Intermediate changes

84 files changed, 7188 insertions, 5900 deletions

diff --git a/contrib/python/hypothesis/py3/.dist-info/METADATA b/contrib/python/hypothesis/py3/.dist-info/METADATA
index 26ae8b8481..d883f6dec6 100644
--- a/contrib/python/hypothesis/py3/.dist-info/METADATA
+++ b/contrib/python/hypothesis/py3/.dist-info/METADATA
@@ -1,6 +1,6 @@
 Metadata-Version: 2.1
 Name: hypothesis
-Version: 6.98.8
+Version: 6.98.9
 Summary: A library for property-based testing
 Home-page: https://hypothesis.works
 Author: David R. MacIver and Zac Hatfield-Dodds
diff --git a/contrib/python/hypothesis/py3/hypothesis/core.py b/contrib/python/hypothesis/py3/hypothesis/core.py
index e000da174f..536d7f0156 100644
--- a/contrib/python/hypothesis/py3/hypothesis/core.py
+++ b/contrib/python/hypothesis/py3/hypothesis/core.py
@@ -834,8 +834,9 @@ class StateForActualGivenExecution:
                     in_drawtime = math.fsum(data.draw_times.values()) - arg_drawtime
                     runtime = datetime.timedelta(seconds=finish - start - in_drawtime)
                     self._timing_features = {
-                        "execute_test": finish - start - in_drawtime,
+                        "execute:test": finish - start - in_drawtime,
                         **data.draw_times,
+                        **data._stateful_run_times,
                     }
 
                 if (current_deadline := self.settings.deadline) is not None:
@@ -927,6 +928,9 @@ class StateForActualGivenExecution:
                     msg, format_arg = data._sampled_from_all_strategies_elements_message
                     add_note(e, msg.format(format_arg))
                 raise
+            finally:
+                if parts := getattr(data, "_stateful_repr_parts", None):
+                    self._string_repr = "\n".join(parts)
 
         # self.test_runner can include the execute_example method, or setup/teardown
         # _example, so it's important to get the PRNG and build context in place first.
@@ -942,7 +946,11 @@ class StateForActualGivenExecution:
         if expected_failure is not None:
             exception, traceback = expected_failure
             if isinstance(exception, DeadlineExceeded) and (
-                runtime_secs := self._timing_features.get("execute_test")
+                runtime_secs := math.fsum(
+                    v
+                    for k, v in self._timing_features.items()
+                    if k.startswith("execute:")
+                )
             ):
                 report(
                     "Unreliable test timings! On an initial run, this "
@@ -1068,6 +1076,7 @@ class StateForActualGivenExecution:
                     arguments={**self._jsonable_arguments, **data._observability_args},
                     timing=self._timing_features,
                     coverage=tractable_coverage_report(trace) or None,
+                    phase=phase,
                 )
                 deliver_json_blob(tc)
             self._timing_features = {}
diff --git a/contrib/python/hypothesis/py3/hypothesis/internal/conjecture/data.py b/contrib/python/hypothesis/py3/hypothesis/internal/conjecture/data.py
index cea40823be..0016f2fa1a 100644
--- a/contrib/python/hypothesis/py3/hypothesis/internal/conjecture/data.py
+++ b/contrib/python/hypothesis/py3/hypothesis/internal/conjecture/data.py
@@ -18,6 +18,7 @@ from typing import (
     TYPE_CHECKING,
     Any,
     Callable,
+    DefaultDict,
     Dict,
     FrozenSet,
     Iterable,
@@ -1468,6 +1469,7 @@ class ConjectureData:
         self.forced_indices: "Set[int]" = set()
         self.interesting_origin: Optional[InterestingOrigin] = None
         self.draw_times: "Dict[str, float]" = {}
+        self._stateful_run_times: "DefaultDict[str, float]" = defaultdict(float)
         self.max_depth = 0
         self.has_discards = False
         self.provider = PrimitiveProvider(self)
@@ -1752,7 +1754,7 @@ class ConjectureData:
                 try:
                     return strategy.do_draw(self)
                 finally:
-                    key = observe_as or f"unlabeled_{len(self.draw_times)}"
+                    key = observe_as or f"generate:unlabeled_{len(self.draw_times)}"
                     self.draw_times[key] = time.perf_counter() - start_time
         finally:
             self.stop_example()
diff --git a/contrib/python/hypothesis/py3/hypothesis/internal/observability.py b/contrib/python/hypothesis/py3/hypothesis/internal/observability.py
index 98753985f1..aff19d805c 100644
--- a/contrib/python/hypothesis/py3/hypothesis/internal/observability.py
+++ b/contrib/python/hypothesis/py3/hypothesis/internal/observability.py
@@ -41,9 +41,12 @@ def make_testcase(
     arguments: Optional[dict] = None,
     timing: Dict[str, float],
     coverage: Optional[Dict[str, List[int]]] = None,
+    phase: Optional[str] = None,
 ) -> dict:
     if data.interesting_origin:
         status_reason = str(data.interesting_origin)
+    elif phase == "shrink" and data.status == Status.OVERRUN:
+        status_reason = "exceeded size of current best example"
     else:
         status_reason = str(data.events.pop("invalid because", ""))
 
diff --git a/contrib/python/hypothesis/py3/hypothesis/stateful.py b/contrib/python/hypothesis/py3/hypothesis/stateful.py
index 2ae5815161..bf7271fc4c 100644
--- a/contrib/python/hypothesis/py3/hypothesis/stateful.py
+++ b/contrib/python/hypothesis/py3/hypothesis/stateful.py
@@ -20,6 +20,7 @@ import inspect
 from copy import copy
 from functools import lru_cache
 from io import StringIO
+from time import perf_counter
 from typing import (
     Any,
     Callable,
@@ -48,6 +49,7 @@ from hypothesis.core import TestFunc, given
 from hypothesis.errors import InvalidArgument, InvalidDefinition
 from hypothesis.internal.conjecture import utils as cu
 from hypothesis.internal.healthcheck import fail_health_check
+from hypothesis.internal.observability import TESTCASE_CALLBACKS
 from hypothesis.internal.reflection import (
     function_digest,
     get_pretty_function_description,
@@ -121,10 +123,17 @@ def run_state_machine_as_test(state_machine_factory, *, settings=None, _min_step
         print_steps = (
             current_build_context().is_final or current_verbosity() >= Verbosity.debug
         )
-        try:
+        cd._stateful_repr_parts = []
+
+        def output(s):
             if print_steps:
-                report(f"state = {machine.__class__.__name__}()")
-            machine.check_invariants(settings)
+                report(s)
+            if TESTCASE_CALLBACKS:
+                cd._stateful_repr_parts.append(s)
+
+        try:
+            output(f"state = {machine.__class__.__name__}()")
+            machine.check_invariants(settings, output, cd._stateful_run_times)
             max_steps = settings.stateful_step_count
             steps_run = 0
 
@@ -141,6 +150,8 @@ def run_state_machine_as_test(state_machine_factory, *, settings=None, _min_step
                     must_stop = True
                 elif steps_run <= _min_steps:
                     must_stop = False
+
+                start_draw = perf_counter()
                 if cd.draw_boolean(p=2**-16, forced=must_stop):
                     break
                 steps_run += 1
@@ -156,12 +167,15 @@ def run_state_machine_as_test(state_machine_factory, *, settings=None, _min_step
                     machine._initialize_rules_to_run.remove(rule)
                 else:
                     rule, data = cd.draw(machine._rules_strategy)
+                draw_label = f"generate:rule:{rule.function.__name__}"
+                cd.draw_times.setdefault(draw_label, 0.0)
+                cd.draw_times[draw_label] += perf_counter() - start_draw
 
                 # Pretty-print the values this rule was called with *before* calling
                 # _add_result_to_targets, to avoid printing arguments which are also
                 # a return value using the variable name they are assigned to.
                 # See https://github.com/HypothesisWorks/hypothesis/issues/2341
-                if print_steps:
+                if print_steps or TESTCASE_CALLBACKS:
                     data_to_print = {
                         k: machine._pretty_print(v) for k, v in data.items()
                     }
@@ -173,7 +187,12 @@ def run_state_machine_as_test(state_machine_factory, *, settings=None, _min_step
                     for k, v in list(data.items()):
                         if isinstance(v, VarReference):
                             data[k] = machine.names_to_values[v.name]
+
+                    label = f"execute:rule:{rule.function.__name__}"
+                    start = perf_counter()
                     result = rule.function(machine, **data)
+                    cd._stateful_run_times[label] += perf_counter() - start
+
                     if rule.targets:
                         if isinstance(result, MultipleResults):
                             for single_result in result.values:
@@ -190,16 +209,15 @@ def run_state_machine_as_test(state_machine_factory, *, settings=None, _min_step
                             HealthCheck.return_value,
                         )
                 finally:
-                    if print_steps:
+                    if print_steps or TESTCASE_CALLBACKS:
                         # 'result' is only used if the step has target bundles.
                         # If it does, and the result is a 'MultipleResult',
                         # then 'print_step' prints a multi-variable assignment.
-                        machine._print_step(rule, data_to_print, result)
-                machine.check_invariants(settings)
+                        output(machine._repr_step(rule, data_to_print, result))
+                machine.check_invariants(settings, output, cd._stateful_run_times)
                 cd.stop_example()
         finally:
-            if print_steps:
-                report("state.teardown()")
+            output("state.teardown()")
             machine.teardown()
 
     # Use a machine digest to identify stateful tests in the example database
@@ -338,7 +356,7 @@ class RuleBasedStateMachine(metaclass=StateMachineMeta):
         cls._invariants_per_class[cls] = target
         return cls._invariants_per_class[cls]
 
-    def _print_step(self, rule, data, result):
+    def _repr_step(self, rule, data, result):
         self.step_count = getattr(self, "step_count", 0) + 1
         output_assignment = ""
         if rule.targets:
@@ -350,13 +368,8 @@ class RuleBasedStateMachine(metaclass=StateMachineMeta):
                     output_assignment = ", ".join(output_names) + " = "
             else:
                 output_assignment = self._last_names(1)[0] + " = "
-        report(
-            "{}state.{}({})".format(
-                output_assignment,
-                rule.function.__name__,
-                ", ".join("%s=%s" % kv for kv in data.items()),
-            )
-        )
+        args = ", ".join("%s=%s" % kv for kv in data.items())
+        return f"{output_assignment}state.{rule.function.__name__}({args})"
 
     def _add_result_to_targets(self, targets, result):
         name = self._new_name()
@@ -367,18 +380,22 @@ class RuleBasedStateMachine(metaclass=StateMachineMeta):
         for target in targets:
             self.bundles.setdefault(target, []).append(VarReference(name))
 
-    def check_invariants(self, settings):
+    def check_invariants(self, settings, output, runtimes):
         for invar in self.invariants():
             if self._initialize_rules_to_run and not invar.check_during_init:
                 continue
             if not all(precond(self) for precond in invar.preconditions):
                 continue
+            name = invar.function.__name__
             if (
                 current_build_context().is_final
                 or settings.verbosity >= Verbosity.debug
+                or TESTCASE_CALLBACKS
             ):
-                report(f"state.{invar.function.__name__}()")
+                output(f"state.{name}()")
+            start = perf_counter()
             result = invar.function(self)
+            runtimes[f"execute:invariant:{name}"] += perf_counter() - start
             if result is not None:
                 fail_health_check(
                     settings,
diff --git a/contrib/python/hypothesis/py3/hypothesis/version.py b/contrib/python/hypothesis/py3/hypothesis/version.py
index 6aafd5421c..f54f8dc42f 100644
--- a/contrib/python/hypothesis/py3/hypothesis/version.py
+++ b/contrib/python/hypothesis/py3/hypothesis/version.py
@@ -8,5 +8,5 @@
 # v. 2.0. If a copy of the MPL was not distributed with this file, You can
 # obtain one at https://mozilla.org/MPL/2.0/.
 
-__version_info__ = (6, 98, 8)
+__version_info__ = (6, 98, 9)
 __version__ = ".".join(map(str, __version_info__))
diff --git a/contrib/python/hypothesis/py3/ya.make b/contrib/python/hypothesis/py3/ya.make
index 1678e159c9..89269430da 100644
--- a/contrib/python/hypothesis/py3/ya.make
+++ b/contrib/python/hypothesis/py3/ya.make
@@ -2,7 +2,7 @@
 
 PY3_LIBRARY()
 
-VERSION(6.98.8)
+VERSION(6.98.9)
 
 LICENSE(MPL-2.0)
 
diff --git a/contrib/python/psutil/py3/.dist-info/METADATA b/contrib/python/psutil/py3/.dist-info/METADATA
index e0d5c4d09b..1815b243bc 100644
--- a/contrib/python/psutil/py3/.dist-info/METADATA
+++ b/contrib/python/psutil/py3/.dist-info/METADATA
@@ -1,11 +1,11 @@
 Metadata-Version: 2.1
 Name: psutil
-Version: 5.8.0
+Version: 5.9.8
 Summary: Cross-platform lib for process and system monitoring in Python.
 Home-page: https://github.com/giampaolo/psutil
 Author: Giampaolo Rodola
 Author-email: g.rodola@gmail.com
-License: BSD
+License: BSD-3-Clause
 Keywords: ps,top,kill,free,lsof,netstat,nice,tty,ionice,uptime,taskmgr,process,df,iotop,iostat,ifconfig,taskset,who,pidof,pmap,smem,pstree,monitoring,ulimit,prlimit,smem,performance,metrics,agent,observability
 Platform: Platform Independent
 Classifier: Development Status :: 5 - Production/Stable
@@ -35,7 +35,6 @@ Classifier: Operating System :: POSIX :: SunOS/Solaris
 Classifier: Operating System :: POSIX
 Classifier: Programming Language :: C
 Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.6
 Classifier: Programming Language :: Python :: 2.7
 Classifier: Programming Language :: Python :: 3
 Classifier: Programming Language :: Python :: Implementation :: CPython
@@ -53,19 +52,19 @@ Classifier: Topic :: System :: Networking
 Classifier: Topic :: System :: Operating System
 Classifier: Topic :: System :: Systems Administration
 Classifier: Topic :: Utilities
-Requires-Python: >=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*
 Description-Content-Type: text/x-rst
+License-File: LICENSE
 Provides-Extra: test
 Requires-Dist: ipaddress ; (python_version < "3.0") and extra == 'test'
 Requires-Dist: mock ; (python_version < "3.0") and extra == 'test'
-Requires-Dist: unittest2 ; (python_version < "3.0") and extra == 'test'
 Requires-Dist: enum34 ; (python_version <= "3.4") and extra == 'test'
 Requires-Dist: pywin32 ; (sys_platform == "win32") and extra == 'test'
 Requires-Dist: wmi ; (sys_platform == "win32") and extra == 'test'
 
-|  |downloads| |stars| |forks| |contributors| |coverage| |quality|
+|  |downloads| |stars| |forks| |contributors| |coverage|
 |  |version| |py-versions| |packages| |license|
-|  |github-actions| |appveyor| |doc| |twitter| |tidelift|
+|  |github-actions-wheels|  |github-actions-bsd| |appveyor| |doc| |twitter| |tidelift|
 
 .. |downloads| image:: https://img.shields.io/pypi/dm/psutil.svg
     :target: https://pepy.tech/project/psutil
@@ -83,24 +82,24 @@ Requires-Dist: wmi ; (sys_platform == "win32") and extra == 'test'
     :target: https://github.com/giampaolo/psutil/graphs/contributors
     :alt: Contributors
 
-.. |quality| image:: https://img.shields.io/codacy/grade/ce63e7f7f69d44b5b59682196e6fbfca.svg
-    :target: https://www.codacy.com/app/g-rodola/psutil?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=giampaolo/psutil&amp;utm_campaign=Badge_Grade
-    :alt: Code quality
+.. |github-actions-wheels| image:: https://img.shields.io/github/actions/workflow/status/giampaolo/psutil/.github/workflows/build.yml?label=Linux%2C%20macOS%2C%20Windows
+    :target: https://github.com/giampaolo/psutil/actions?query=workflow%3Abuild
+    :alt: Linux, macOS, Windows
 
-.. |github-actions| image:: https://img.shields.io/github/workflow/status/giampaolo/psutil/CI?label=Linux%2C%20macOS%2C%20FreeBSD
-    :target: https://github.com/giampaolo/psutil/actions?query=workflow%3ACI
-    :alt: Linux, macOS, Windows tests
+.. |github-actions-bsd| image:: https://img.shields.io/github/actions/workflow/status/giampaolo/psutil/.github/workflows/bsd.yml?label=FreeBSD,%20NetBSD,%20OpenBSD
+    :target: https://github.com/giampaolo/psutil/actions?query=workflow%3Absd-tests
+    :alt: FreeBSD, NetBSD, OpenBSD
 
-.. |appveyor| image:: https://img.shields.io/appveyor/ci/giampaolo/psutil/master.svg?maxAge=3600&label=Windows
+.. |appveyor| image:: https://img.shields.io/appveyor/build/giampaolo/psutil/master.svg?maxAge=3600&label=Windows%20(py2)
     :target: https://ci.appveyor.com/project/giampaolo/psutil
-    :alt: Windows tests (Appveyor)
+    :alt: Windows (Appveyor)
 
 .. |coverage| image:: https://coveralls.io/repos/github/giampaolo/psutil/badge.svg?branch=master
     :target: https://coveralls.io/github/giampaolo/psutil?branch=master
     :alt: Test coverage (coverall.io)
 
 .. |doc| image:: https://readthedocs.org/projects/psutil/badge/?version=latest
-    :target: http://psutil.readthedocs.io/en/latest/?badge=latest
+    :target: https://psutil.readthedocs.io/en/latest/
     :alt: Documentation Status
 
 .. |version| image:: https://img.shields.io/pypi/v/psutil.svg?label=pypi
@@ -108,7 +107,6 @@ Requires-Dist: wmi ; (sys_platform == "win32") and extra == 'test'
     :alt: Latest version
 
 .. |py-versions| image:: https://img.shields.io/pypi/pyversions/psutil.svg
-    :target: https://pypi.org/project/psutil
     :alt: Supported Python versions
 
 .. |packages| image:: https://repology.org/badge/tiny-repos/python:psutil.svg
@@ -161,7 +159,7 @@ psutil currently supports the following platforms:
 - **Sun Solaris**
 - **AIX**
 
-Supported Python versions are **2.6**, **2.7**, **3.4+** and
+Supported Python versions are **2.7**, **3.6+** and
 `PyPy <http://pypy.org/>`__.
 
 Funding
@@ -172,7 +170,7 @@ immensely from some funding.
 Keeping up with bug reports and maintenance has become hardly sustainable for
 me alone in terms of time.
 If you're a company that's making significant use of psutil you can consider
-becoming a sponsor via `GitHub <https://github.com/sponsors/giampaolo>`__,
+becoming a sponsor via `GitHub Sponsors <https://github.com/sponsors/giampaolo>`__,
 `Open Collective <https://opencollective.com/psutil>`__ or
 `PayPal <https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=A9ZS7PKKRM3S8>`__
 and have your logo displayed in here and psutil `doc <https://psutil.readthedocs.io>`__.
@@ -199,7 +197,7 @@ CPU
     >>> import psutil
     >>>
     >>> psutil.cpu_times()
-    scputimes(user=3961.46, nice=169.729, system=2150.659, idle=16900.540, iowait=629.59, irq=0.0, softirq=19.42, steal=0.0, guest=0, nice=0.0)
+    scputimes(user=3961.46, nice=169.729, system=2150.659, idle=16900.540, iowait=629.59, irq=0.0, softirq=19.42, steal=0.0, guest=0, guest_nice=0.0)
     >>>
     >>> for x in range(3):
     ...     psutil.cpu_percent(interval=1)
@@ -254,7 +252,7 @@ Disks
 
     >>> psutil.disk_partitions()
     [sdiskpart(device='/dev/sda1', mountpoint='/', fstype='ext4', opts='rw,nosuid', maxfile=255, maxpath=4096),
-     sdiskpart(device='/dev/sda2', mountpoint='/home', fstype='ext, opts='rw', maxfile=255, maxpath=4096)]
+     sdiskpart(device='/dev/sda2', mountpoint='/home', fstype='ext', opts='rw', maxfile=255, maxpath=4096)]
     >>>
     >>> psutil.disk_usage('/')
     sdiskusage(total=21378641920, used=4809781248, free=15482871808, percent=22.5)
@@ -286,8 +284,8 @@ Network
                snicaddr(family=<AddressFamily.AF_LINK: 17>, address='c4:85:08:45:06:41', netmask=None, broadcast='ff:ff:ff:ff:ff:ff', ptp=None)]}
     >>>
     >>> psutil.net_if_stats()
-    {'lo': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_UNKNOWN: 0>, speed=0, mtu=65536),
-     'wlan0': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=100, mtu=1500)}
+    {'lo': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_UNKNOWN: 0>, speed=0, mtu=65536, flags='up,loopback,running'),
+     'wlan0': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=100, mtu=1500, flags='up,broadcast,running,multicast')}
     >>>
 
 Sensors
@@ -340,39 +338,38 @@ Process management
     >>> p = psutil.Process(7055)
     >>> p
     psutil.Process(pid=7055, name='python3', status='running', started='09:04:44')
+    >>> p.pid
+    7055
     >>> p.name()
-    'python'
+    'python3'
     >>> p.exe()
-    '/usr/bin/python'
+    '/usr/bin/python3'
     >>> p.cwd()
     '/home/giampaolo'
     >>> p.cmdline()
-    ['/usr/bin/python', 'main.py']
+    ['/usr/bin/python3', 'main.py']
     >>>
-    >>> p.pid
-    7055
     >>> p.ppid()
     7054
-    >>> p.children(recursive=True)
-    [psutil.Process(pid=29835, name='python3', status='sleeping', started='11:45:38'),
-     psutil.Process(pid=29836, name='python3', status='waking', started='11:43:39')]
-    >>>
     >>> p.parent()
     psutil.Process(pid=4699, name='bash', status='sleeping', started='09:06:44')
     >>> p.parents()
     [psutil.Process(pid=4699, name='bash', started='09:06:44'),
      psutil.Process(pid=4689, name='gnome-terminal-server', status='sleeping', started='0:06:44'),
      psutil.Process(pid=1, name='systemd', status='sleeping', started='05:56:55')]
+    >>> p.children(recursive=True)
+    [psutil.Process(pid=29835, name='python3', status='sleeping', started='11:45:38'),
+     psutil.Process(pid=29836, name='python3', status='waking', started='11:43:39')]
     >>>
     >>> p.status()
     'running'
-    >>> p.username()
-    'giampaolo'
     >>> p.create_time()
     1267551141.5019531
     >>> p.terminal()
     '/dev/pts/0'
     >>>
+    >>> p.username()
+    'giampaolo'
     >>> p.uids()
     puids(real=1000, effective=1000, saved=1000)
     >>> p.gids()
@@ -412,14 +409,14 @@ Process management
     [pconn(fd=115, family=<AddressFamily.AF_INET: 2>, type=<SocketType.SOCK_STREAM: 1>, laddr=addr(ip='10.0.0.1', port=48776), raddr=addr(ip='93.186.135.91', port=80), status='ESTABLISHED'),
      pconn(fd=117, family=<AddressFamily.AF_INET: 2>, type=<SocketType.SOCK_STREAM: 1>, laddr=addr(ip='10.0.0.1', port=43761), raddr=addr(ip='72.14.234.100', port=80), status='CLOSING')]
     >>>
-    >>> p.num_threads()
-    4
-    >>> p.num_fds()
-    8
     >>> p.threads()
     [pthread(id=5234, user_time=22.5, system_time=9.2891),
      pthread(id=5237, user_time=0.0707, system_time=1.1)]
     >>>
+    >>> p.num_threads()
+    4
+    >>> p.num_fds()
+    8
     >>> p.num_ctx_switches()
     pctxsw(voluntary=78, involuntary=19)
     >>>
@@ -486,23 +483,6 @@ Further process APIs
     >>> gone, alive = psutil.wait_procs(procs_list, timeout=3, callback=on_terminate)
     >>>
 
-Popen wrapper:
-
-.. code-block:: python
-
-    >>> import psutil
-    >>> from subprocess import PIPE
-    >>> p = psutil.Popen(["/usr/bin/python", "-c", "print('hello')"], stdout=PIPE)
-    >>> p.name()
-    'python'
-    >>> p.username()
-    'giampaolo'
-    >>> p.communicate()
-    ('hello\n', None)
-    >>> p.wait(timeout=2)
-    0
-    >>>
-
 Windows services
 ----------------
 
@@ -533,6 +513,7 @@ Here's some I find particularly interesting:
 - https://github.com/google/grr
 - https://github.com/facebook/osquery/
 - https://github.com/nicolargo/glances
+- https://github.com/aristocratos/bpytop
 - https://github.com/Jahaja/psdash
 - https://github.com/ajenti/ajenti
 - https://github.com/home-assistant/home-assistant/
@@ -545,16 +526,5 @@ Portings
 - Rust: https://github.com/rust-psutil/rust-psutil
 - Nim: https://github.com/johnscillieri/psutil-nim
 
-Security
-========
-
-To report a security vulnerability, please use the `Tidelift security
-contact`_.  Tidelift will coordinate the fix and disclosure.
-
-.. _`Giampaolo Rodola`: https://gmpy.dev/about
-.. _`donation`: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=A9ZS7PKKRM3S8
-.. _Tidelift security contact: https://tidelift.com/security
-.. _Tidelift Subscription: https://tidelift.com/subscription/pkg/pypi-psutil?utm_source=pypi-psutil&utm_medium=referral&utm_campaign=readme
-
 
 
diff --git a/contrib/python/psutil/py3/LICENSE b/contrib/python/psutil/py3/LICENSE
index 0bf4a7fc04..cff5eb74e1 100644
--- a/contrib/python/psutil/py3/LICENSE
+++ b/contrib/python/psutil/py3/LICENSE
@@ -1,6 +1,6 @@
 BSD 3-Clause License
 
-Copyright (c) 2009, Jay Loden, Dave Daeschler, Giampaolo Rodola'
+Copyright (c) 2009, Jay Loden, Dave Daeschler, Giampaolo Rodola
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,
diff --git a/contrib/python/psutil/py3/README.rst b/contrib/python/psutil/py3/README.rst
index a9334da283..12bf64254e 100644
--- a/contrib/python/psutil/py3/README.rst
+++ b/contrib/python/psutil/py3/README.rst
@@ -1,6 +1,6 @@
-|  |downloads| |stars| |forks| |contributors| |coverage| |quality|
+|  |downloads| |stars| |forks| |contributors| |coverage|
 |  |version| |py-versions| |packages| |license|
-|  |github-actions| |appveyor| |doc| |twitter| |tidelift|
+|  |github-actions-wheels|  |github-actions-bsd| |appveyor| |doc| |twitter| |tidelift|
 
 .. |downloads| image:: https://img.shields.io/pypi/dm/psutil.svg
     :target: https://pepy.tech/project/psutil
@@ -18,24 +18,24 @@
     :target: https://github.com/giampaolo/psutil/graphs/contributors
     :alt: Contributors
 
-.. |quality| image:: https://img.shields.io/codacy/grade/ce63e7f7f69d44b5b59682196e6fbfca.svg
-    :target: https://www.codacy.com/app/g-rodola/psutil?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=giampaolo/psutil&amp;utm_campaign=Badge_Grade
-    :alt: Code quality
+.. |github-actions-wheels| image:: https://img.shields.io/github/actions/workflow/status/giampaolo/psutil/.github/workflows/build.yml?label=Linux%2C%20macOS%2C%20Windows
+    :target: https://github.com/giampaolo/psutil/actions?query=workflow%3Abuild
+    :alt: Linux, macOS, Windows
 
-.. |github-actions| image:: https://img.shields.io/github/workflow/status/giampaolo/psutil/CI?label=Linux%2C%20macOS%2C%20FreeBSD
-    :target: https://github.com/giampaolo/psutil/actions?query=workflow%3ACI
-    :alt: Linux, macOS, Windows tests
+.. |github-actions-bsd| image:: https://img.shields.io/github/actions/workflow/status/giampaolo/psutil/.github/workflows/bsd.yml?label=FreeBSD,%20NetBSD,%20OpenBSD
+    :target: https://github.com/giampaolo/psutil/actions?query=workflow%3Absd-tests
+    :alt: FreeBSD, NetBSD, OpenBSD
 
-.. |appveyor| image:: https://img.shields.io/appveyor/ci/giampaolo/psutil/master.svg?maxAge=3600&label=Windows
+.. |appveyor| image:: https://img.shields.io/appveyor/build/giampaolo/psutil/master.svg?maxAge=3600&label=Windows%20(py2)
     :target: https://ci.appveyor.com/project/giampaolo/psutil
-    :alt: Windows tests (Appveyor)
+    :alt: Windows (Appveyor)
 
 .. |coverage| image:: https://coveralls.io/repos/github/giampaolo/psutil/badge.svg?branch=master
     :target: https://coveralls.io/github/giampaolo/psutil?branch=master
     :alt: Test coverage (coverall.io)
 
 .. |doc| image:: https://readthedocs.org/projects/psutil/badge/?version=latest
-    :target: http://psutil.readthedocs.io/en/latest/?badge=latest
+    :target: https://psutil.readthedocs.io/en/latest/
     :alt: Documentation Status
 
 .. |version| image:: https://img.shields.io/pypi/v/psutil.svg?label=pypi
@@ -43,7 +43,6 @@
     :alt: Latest version
 
 .. |py-versions| image:: https://img.shields.io/pypi/pyversions/psutil.svg
-    :target: https://pypi.org/project/psutil
     :alt: Supported Python versions
 
 .. |packages| image:: https://repology.org/badge/tiny-repos/python:psutil.svg
@@ -99,7 +98,7 @@ psutil currently supports the following platforms:
 - **Sun Solaris**
 - **AIX**
 
-Supported Python versions are **2.6**, **2.7**, **3.4+** and
+Supported Python versions are **2.7**, **3.6+** and
 `PyPy <http://pypy.org/>`__.
 
 Funding
@@ -110,7 +109,7 @@ immensely from some funding.
 Keeping up with bug reports and maintenance has become hardly sustainable for
 me alone in terms of time.
 If you're a company that's making significant use of psutil you can consider
-becoming a sponsor via `GitHub <https://github.com/sponsors/giampaolo>`__,
+becoming a sponsor via `GitHub Sponsors <https://github.com/sponsors/giampaolo>`__,
 `Open Collective <https://opencollective.com/psutil>`__ or
 `PayPal <https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=A9ZS7PKKRM3S8>`__
 and have your logo displayed in here and psutil `doc <https://psutil.readthedocs.io>`__.
@@ -122,7 +121,11 @@ Sponsors
 
     <div>
         <a href="https://tidelift.com/subscription/pkg/pypi-psutil?utm_source=pypi-psutil&utm_medium=referral&utm_campaign=readme">
-            <img src="https://github.com/giampaolo/psutil/raw/master/docs/_static/tidelift-logo.png" />
+            <img width="185" src="https://github.com/giampaolo/psutil/raw/master/docs/_static/tidelift-logo.svg" />
+        </a>
+        &nbsp;&nbsp
+        <a href="https://sansec.io/">
+            <img src="https://sansec.io/assets/images/logo.svg" />
         </a>
     </div>
     <sup><a href="https://github.com/sponsors/giampaolo">add your logo</a></sup>
@@ -130,16 +133,32 @@ Sponsors
 Supporters
 ==========
 
-None yet.
-
 .. raw:: html
 
+    <div>
+      <a href="https://github.com/dbwiddis"><img height="40" width="40" title="Daniel Widdis" src="https://avatars1.githubusercontent.com/u/9291703?s=88&amp;v=4" /></a>
+      <a href="https://github.com/aristocratos"><img height="40" width="40" title="aristocratos" src="https://avatars3.githubusercontent.com/u/59659483?s=96&amp;v=4" /></a>
+      <a href="https://github.com/cybersecgeek"><img height="40" width="40" title="cybersecgeek" src="https://avatars.githubusercontent.com/u/12847926?v=4" /></a>
+      <a href="https://github.com/scoutapm-sponsorships"><img height="40" width="40" title="scoutapm-sponsorships" src="https://avatars.githubusercontent.com/u/71095532?v=4" /></a>
+      <a href="https://opencollective.com/chenyoo-hao"><img height="40" width="40" title="Chenyoo Hao" src="https://images.opencollective.com/chenyoo-hao/avatar/40.png" /></a>
+      <a href="https://opencollective.com/alexey-vazhnov"><img height="40" width="40" title="Alexey Vazhnov" src="https://images.opencollective.com/alexey-vazhnov/daed334/avatar/40.png" /></a>
+      <a href="https://github.com/indeedeng"><img height="40" width="40" title="indeedeng" src="https://avatars.githubusercontent.com/u/2905043?s=200&v=4" /></a>
+      <a href="https://github.com/PySimpleGUI"><img height="40" width="40" title="PySimpleGUI" src="https://avatars.githubusercontent.com/u/46163555?v=4" /></a>
+      <a href="https://github.com/u93"><img height="40" width="40" title="Eugenio E Breijo" src="https://avatars.githubusercontent.com/u/16807302?v=4" /></a>
+      <a href="https://github.com/guilt"><img height="40" width="40" title="Karthik Kumar Viswanathan" src="https://avatars.githubusercontent.com/u/195178?v=4" /></a>
+      <a href="https://github.com/eallrich"><img height="40" width="40" title="Evan Allrich" src="https://avatars.githubusercontent.com/u/17393?v=4" /></a>
+      <a href="https://github.com/robusta-dev"><img height="40" width="40" title="Robusta" src="https://avatars.githubusercontent.com/u/82757710?s=200&v=4" /></a>
+      <a href="https://github.com/JeremyGrosser"><img height="40" width="40" title="JeremyGrosser" src="https://avatars.githubusercontent.com/u/2151?v=4" /></a>
+      <a href="https://github.com/getsentry"><img height="40" width="40" title="getsentry" src="https://avatars.githubusercontent.com/u/1396951?s=200&v=4" /></a>
+
+    </div>
     <sup><a href="https://github.com/sponsors/giampaolo">add your avatar</a></sup>
 
+
 Contributing
 ============
 
-See `CONTRIBUTING.md <https://github.com/giampaolo/psutil/blob/master/CONTRIBUTING.md>`__ guidelines.
+See `contributing guidelines <https://github.com/giampaolo/psutil/blob/master/CONTRIBUTING.md>`__.
 
 Example usages
 ==============
@@ -154,7 +173,7 @@ CPU
     >>> import psutil
     >>>
     >>> psutil.cpu_times()
-    scputimes(user=3961.46, nice=169.729, system=2150.659, idle=16900.540, iowait=629.59, irq=0.0, softirq=19.42, steal=0.0, guest=0, nice=0.0)
+    scputimes(user=3961.46, nice=169.729, system=2150.659, idle=16900.540, iowait=629.59, irq=0.0, softirq=19.42, steal=0.0, guest=0, guest_nice=0.0)
     >>>
     >>> for x in range(3):
     ...     psutil.cpu_percent(interval=1)
@@ -209,7 +228,7 @@ Disks
 
     >>> psutil.disk_partitions()
     [sdiskpart(device='/dev/sda1', mountpoint='/', fstype='ext4', opts='rw,nosuid', maxfile=255, maxpath=4096),
-     sdiskpart(device='/dev/sda2', mountpoint='/home', fstype='ext, opts='rw', maxfile=255, maxpath=4096)]
+     sdiskpart(device='/dev/sda2', mountpoint='/home', fstype='ext', opts='rw', maxfile=255, maxpath=4096)]
     >>>
     >>> psutil.disk_usage('/')
     sdiskusage(total=21378641920, used=4809781248, free=15482871808, percent=22.5)
@@ -241,8 +260,8 @@ Network
                snicaddr(family=<AddressFamily.AF_LINK: 17>, address='c4:85:08:45:06:41', netmask=None, broadcast='ff:ff:ff:ff:ff:ff', ptp=None)]}
     >>>
     >>> psutil.net_if_stats()
-    {'lo': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_UNKNOWN: 0>, speed=0, mtu=65536),
-     'wlan0': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=100, mtu=1500)}
+    {'lo': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_UNKNOWN: 0>, speed=0, mtu=65536, flags='up,loopback,running'),
+     'wlan0': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=100, mtu=1500, flags='up,broadcast,running,multicast')}
     >>>
 
 Sensors
@@ -295,39 +314,38 @@ Process management
     >>> p = psutil.Process(7055)
     >>> p
     psutil.Process(pid=7055, name='python3', status='running', started='09:04:44')
+    >>> p.pid
+    7055
     >>> p.name()
-    'python'
+    'python3'
     >>> p.exe()
-    '/usr/bin/python'
+    '/usr/bin/python3'
     >>> p.cwd()
     '/home/giampaolo'
     >>> p.cmdline()
-    ['/usr/bin/python', 'main.py']
+    ['/usr/bin/python3', 'main.py']
     >>>
-    >>> p.pid
-    7055
     >>> p.ppid()
     7054
-    >>> p.children(recursive=True)
-    [psutil.Process(pid=29835, name='python3', status='sleeping', started='11:45:38'),
-     psutil.Process(pid=29836, name='python3', status='waking', started='11:43:39')]
-    >>>
     >>> p.parent()
     psutil.Process(pid=4699, name='bash', status='sleeping', started='09:06:44')
     >>> p.parents()
     [psutil.Process(pid=4699, name='bash', started='09:06:44'),
      psutil.Process(pid=4689, name='gnome-terminal-server', status='sleeping', started='0:06:44'),
      psutil.Process(pid=1, name='systemd', status='sleeping', started='05:56:55')]
+    >>> p.children(recursive=True)
+    [psutil.Process(pid=29835, name='python3', status='sleeping', started='11:45:38'),
+     psutil.Process(pid=29836, name='python3', status='waking', started='11:43:39')]
     >>>
     >>> p.status()
     'running'
-    >>> p.username()
-    'giampaolo'
     >>> p.create_time()
     1267551141.5019531
     >>> p.terminal()
     '/dev/pts/0'
     >>>
+    >>> p.username()
+    'giampaolo'
     >>> p.uids()
     puids(real=1000, effective=1000, saved=1000)
     >>> p.gids()
@@ -367,14 +385,14 @@ Process management
     [pconn(fd=115, family=<AddressFamily.AF_INET: 2>, type=<SocketType.SOCK_STREAM: 1>, laddr=addr(ip='10.0.0.1', port=48776), raddr=addr(ip='93.186.135.91', port=80), status='ESTABLISHED'),
      pconn(fd=117, family=<AddressFamily.AF_INET: 2>, type=<SocketType.SOCK_STREAM: 1>, laddr=addr(ip='10.0.0.1', port=43761), raddr=addr(ip='72.14.234.100', port=80), status='CLOSING')]
     >>>
-    >>> p.num_threads()
-    4
-    >>> p.num_fds()
-    8
     >>> p.threads()
     [pthread(id=5234, user_time=22.5, system_time=9.2891),
      pthread(id=5237, user_time=0.0707, system_time=1.1)]
     >>>
+    >>> p.num_threads()
+    4
+    >>> p.num_fds()
+    8
     >>> p.num_ctx_switches()
     pctxsw(voluntary=78, involuntary=19)
     >>>
@@ -441,23 +459,6 @@ Further process APIs
     >>> gone, alive = psutil.wait_procs(procs_list, timeout=3, callback=on_terminate)
     >>>
 
-Popen wrapper:
-
-.. code-block:: python
-
-    >>> import psutil
-    >>> from subprocess import PIPE
-    >>> p = psutil.Popen(["/usr/bin/python", "-c", "print('hello')"], stdout=PIPE)
-    >>> p.name()
-    'python'
-    >>> p.username()
-    'giampaolo'
-    >>> p.communicate()
-    ('hello\n', None)
-    >>> p.wait(timeout=2)
-    0
-    >>>
-
 Windows services
 ----------------
 
@@ -488,6 +489,7 @@ Here's some I find particularly interesting:
 - https://github.com/google/grr
 - https://github.com/facebook/osquery/
 - https://github.com/nicolargo/glances
+- https://github.com/aristocratos/bpytop
 - https://github.com/Jahaja/psdash
 - https://github.com/ajenti/ajenti
 - https://github.com/home-assistant/home-assistant/
@@ -499,14 +501,3 @@ Portings
 - C: https://github.com/hamon-in/cpslib
 - Rust: https://github.com/rust-psutil/rust-psutil
 - Nim: https://github.com/johnscillieri/psutil-nim
-
-Security
-========
-
-To report a security vulnerability, please use the `Tidelift security
-contact`_.  Tidelift will coordinate the fix and disclosure.
-
-.. _`Giampaolo Rodola`: https://gmpy.dev/about
-.. _`donation`: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=A9ZS7PKKRM3S8
-.. _Tidelift security contact: https://tidelift.com/security
-.. _Tidelift Subscription: https://tidelift.com/subscription/pkg/pypi-psutil?utm_source=pypi-psutil&utm_medium=referral&utm_campaign=readme
diff --git a/contrib/python/psutil/py3/psutil/__init__.py b/contrib/python/psutil/py3/psutil/__init__.py
index acd42ac264..8138db41e1 100644
--- a/contrib/python/psutil/py3/psutil/__init__.py
+++ b/contrib/python/psutil/py3/psutil/__init__.py
@@ -17,10 +17,11 @@ sensors) in Python. Supported platforms:
  - Sun Solaris
  - AIX
 
-Works with Python versions from 2.6 to 3.4+.
+Works with Python versions 2.7 and 3.6+.
 """
 
 from __future__ import division
+
 import collections
 import contextlib
 import datetime
@@ -31,24 +32,16 @@ import subprocess
 import sys
 import threading
 import time
+
+
 try:
     import pwd
 except ImportError:
     pwd = None
 
 from . import _common
-from ._common import AccessDenied
-from ._common import Error
-from ._common import memoize_when_activated
-from ._common import NoSuchProcess
-from ._common import TimeoutExpired
-from ._common import wrap_numbers as _wrap_numbers
-from ._common import ZombieProcess
-from ._compat import long
-from ._compat import PermissionError
-from ._compat import ProcessLookupError
-from ._compat import PY3 as _PY3
-
+from ._common import AIX
+from ._common import BSD
 from ._common import CONN_CLOSE
 from ._common import CONN_CLOSE_WAIT
 from ._common import CONN_CLOSING
@@ -61,9 +54,16 @@ from ._common import CONN_NONE
 from ._common import CONN_SYN_RECV
 from ._common import CONN_SYN_SENT
 from ._common import CONN_TIME_WAIT
+from ._common import FREEBSD  # NOQA
+from ._common import LINUX
+from ._common import MACOS
+from ._common import NETBSD  # NOQA
 from ._common import NIC_DUPLEX_FULL
 from ._common import NIC_DUPLEX_HALF
 from ._common import NIC_DUPLEX_UNKNOWN
+from ._common import OPENBSD  # NOQA
+from ._common import OSX  # deprecated alias
+from ._common import POSIX  # NOQA
 from ._common import POWER_TIME_UNKNOWN
 from ._common import POWER_TIME_UNLIMITED
 from ._common import STATUS_DEAD
@@ -78,18 +78,21 @@ from ._common import STATUS_TRACING_STOP
 from ._common import STATUS_WAITING
 from ._common import STATUS_WAKING
 from ._common import STATUS_ZOMBIE
-
-from ._common import AIX
-from ._common import BSD
-from ._common import FREEBSD  # NOQA
-from ._common import LINUX
-from ._common import MACOS
-from ._common import NETBSD  # NOQA
-from ._common import OPENBSD  # NOQA
-from ._common import OSX  # deprecated alias
-from ._common import POSIX  # NOQA
 from ._common import SUNOS
 from ._common import WINDOWS
+from ._common import AccessDenied
+from ._common import Error
+from ._common import NoSuchProcess
+from ._common import TimeoutExpired
+from ._common import ZombieProcess
+from ._common import memoize_when_activated
+from ._common import wrap_numbers as _wrap_numbers
+from ._compat import PY3 as _PY3
+from ._compat import PermissionError
+from ._compat import ProcessLookupError
+from ._compat import SubprocessTimeoutExpired as _SubprocessTimeoutExpired
+from ._compat import long
+
 
 if LINUX:
     # This is public API and it will be retrieved from _pslinux.py
@@ -97,7 +100,6 @@ if LINUX:
     PROCFS_PATH = "/proc"
 
     from . import _pslinux as _psplatform
-
     from ._pslinux import IOPRIO_CLASS_BE  # NOQA
     from ._pslinux import IOPRIO_CLASS_IDLE  # NOQA
     from ._pslinux import IOPRIO_CLASS_NONE  # NOQA
@@ -112,10 +114,10 @@ elif WINDOWS:
     from ._psutil_windows import NORMAL_PRIORITY_CLASS  # NOQA
     from ._psutil_windows import REALTIME_PRIORITY_CLASS  # NOQA
     from ._pswindows import CONN_DELETE_TCB  # NOQA
-    from ._pswindows import IOPRIO_VERYLOW  # NOQA
+    from ._pswindows import IOPRIO_HIGH  # NOQA
     from ._pswindows import IOPRIO_LOW  # NOQA
     from ._pswindows import IOPRIO_NORMAL  # NOQA
-    from ._pswindows import IOPRIO_HIGH  # NOQA
+    from ._pswindows import IOPRIO_VERYLOW  # NOQA
 
 elif MACOS:
     from . import _psosx as _psplatform
@@ -143,6 +145,7 @@ else:  # pragma: no cover
     raise NotImplementedError('platform %s is not supported' % sys.platform)
 
 
+# fmt: off
 __all__ = [
     # exceptions
     "Error", "NoSuchProcess", "ZombieProcess", "AccessDenied",
@@ -189,6 +192,7 @@ __all__ = [
     # "sensors_temperatures", "sensors_battery", "sensors_fans"     # sensors
     "users", "boot_time",                                           # others
 ]
+# fmt: on
 
 
 __all__.extend(_psplatform.__extra__all__)
@@ -209,7 +213,7 @@ if hasattr(_psplatform.Process, "rlimit"):
 AF_LINK = _psplatform.AF_LINK
 
 __author__ = "Giampaolo Rodola'"
-__version__ = "5.8.0"
+__version__ = "5.9.8"
 version_info = tuple([int(num) for num in __version__.split('.')])
 
 _timer = getattr(time, 'monotonic', time.time)
@@ -223,18 +227,25 @@ _SENTINEL = object()
 # was compiled for a different version of psutil.
 # We want to prevent that by failing sooner rather than later.
 # See: https://github.com/giampaolo/psutil/issues/564
-if (int(__version__.replace('.', '')) !=
-        getattr(_psplatform.cext, 'version', None)):
-    msg = "version conflict: %r C extension module was built for another " \
-          "version of psutil" % getattr(_psplatform.cext, "__file__")
+if int(__version__.replace('.', '')) != getattr(
+    _psplatform.cext, 'version', None
+):
+    msg = "version conflict: %r C extension " % _psplatform.cext.__file__
+    msg += "module was built for another version of psutil"
     if hasattr(_psplatform.cext, 'version'):
         msg += " (%s instead of %s)" % (
-            '.'.join([x for x in str(_psplatform.cext.version)]), __version__)
+            '.'.join([x for x in str(_psplatform.cext.version)]),
+            __version__,
+        )
     else:
         msg += " (different than %s)" % __version__
     msg += "; you may try to 'pip uninstall psutil', manually remove %s" % (
-        getattr(_psplatform.cext, "__file__",
-                "the existing psutil install directory"))
+        getattr(
+            _psplatform.cext,
+            "__file__",
+            "the existing psutil install directory",
+        )
+    )
     msg += " or clean the virtual env somehow, then reinstall"
     raise ImportError(msg)
 
@@ -248,6 +259,7 @@ if hasattr(_psplatform, 'ppid_map'):
     # Faster version (Windows and Linux).
     _ppid_map = _psplatform.ppid_map
 else:  # pragma: no cover
+
     def _ppid_map():
         """Return a {pid: ppid, ...} dict for all running processes in
         one shot. Used to speed up Process.children().
@@ -261,26 +273,11 @@ else:  # pragma: no cover
         return ret
 
 
-def _assert_pid_not_reused(fun):
-    """Decorator which raises NoSuchProcess in case a process is no
-    longer running or its PID has been reused.
-    """
-    @functools.wraps(fun)
-    def wrapper(self, *args, **kwargs):
-        if not self.is_running():
-            raise NoSuchProcess(self.pid, self._name)
-        return fun(self, *args, **kwargs)
-    return wrapper
-
-
 def _pprint_secs(secs):
     """Format seconds in a human readable form."""
     now = time.time()
     secs_ago = int(now - secs)
-    if secs_ago < 60 * 60 * 24:
-        fmt = "%H:%M:%S"
-    else:
-        fmt = "%Y-%m-%d %H:%M:%S"
+    fmt = "%H:%M:%S" if secs_ago < 60 * 60 * 24 else "%Y-%m-%d %H:%M:%S"
     return datetime.datetime.fromtimestamp(secs).strftime(fmt)
 
 
@@ -289,7 +286,7 @@ def _pprint_secs(secs):
 # =====================================================================
 
 
-class Process(object):
+class Process(object):  # noqa: UP004
     """Represents an OS process with the given PID.
     If PID is omitted current process PID (os.getpid()) is used.
     Raise NoSuchProcess if PID does not exist.
@@ -319,7 +316,7 @@ class Process(object):
      - use is_running() before querying the process
      - if you're continuously iterating over a set of Process
        instances use process_iter() which pre-emptively checks
-     process identity for every yielded instance
+       process identity for every yielded instance
     """
 
     def __init__(self, pid=None):
@@ -330,15 +327,23 @@ class Process(object):
             pid = os.getpid()
         else:
             if not _PY3 and not isinstance(pid, (int, long)):
-                raise TypeError('pid must be an integer (got %r)' % pid)
+                msg = "pid must be an integer (got %r)" % pid
+                raise TypeError(msg)
             if pid < 0:
-                raise ValueError('pid must be a positive integer (got %s)'
-                                 % pid)
+                msg = "pid must be a positive integer (got %s)" % pid
+                raise ValueError(msg)
+            try:
+                _psplatform.cext.check_pid_range(pid)
+            except OverflowError:
+                msg = "process PID out of range (got %s)" % pid
+                raise NoSuchProcess(pid, msg=msg)
+
         self._pid = pid
         self._name = None
         self._exe = None
         self._create_time = None
         self._gone = False
+        self._pid_reused = False
         self._hash = None
         self._lock = threading.RLock()
         # used for caching on Windows only (on POSIX ppid may change)
@@ -363,21 +368,18 @@ class Process(object):
             pass
         except NoSuchProcess:
             if not _ignore_nsp:
-                msg = 'no process found with pid %s' % pid
-                raise NoSuchProcess(pid, None, msg)
+                msg = "process PID not found"
+                raise NoSuchProcess(pid, msg=msg)
             else:
                 self._gone = True
-        # This pair is supposed to indentify a Process instance
+        # This pair is supposed to identify a Process instance
         # univocally over time (the PID alone is not enough as
         # it might refer to a process whose PID has been reused).
         # This will be used later in __eq__() and is_running().
         self._ident = (self.pid, self._create_time)
 
     def __str__(self):
-        try:
-            info = collections.OrderedDict()
-        except AttributeError:  # pragma: no cover
-            info = {}  # Python 2.6
+        info = collections.OrderedDict()
         info["pid"] = self.pid
         if self._name:
             info['name'] = self._name
@@ -393,12 +395,13 @@ class Process(object):
                 pass
             if self._exitcode not in (_SENTINEL, None):
                 info["exitcode"] = self._exitcode
-            if self._create_time:
+            if self._create_time is not None:
                 info['started'] = _pprint_secs(self._create_time)
             return "%s.%s(%s)" % (
                 self.__class__.__module__,
                 self.__class__.__name__,
-                ", ".join(["%s=%r" % (k, v) for k, v in info.items()]))
+                ", ".join(["%s=%r" % (k, v) for k, v in info.items()]),
+            )
 
     __repr__ = __str__
 
@@ -407,6 +410,20 @@ class Process(object):
         # on PID and creation time.
         if not isinstance(other, Process):
             return NotImplemented
+        if OPENBSD or NETBSD:  # pragma: no cover
+            # Zombie processes on Open/NetBSD have a creation time of
+            # 0.0. This covers the case when a process started normally
+            # (so it has a ctime), then it turned into a zombie. It's
+            # important to do this because is_running() depends on
+            # __eq__.
+            pid1, ctime1 = self._ident
+            pid2, ctime2 = other._ident
+            if pid1 == pid2:
+                if ctime1 and not ctime2:
+                    try:
+                        return self.status() == STATUS_ZOMBIE
+                    except Error:
+                        pass
         return self._ident == other._ident
 
     def __ne__(self, other):
@@ -417,6 +434,18 @@ class Process(object):
             self._hash = hash(self._ident)
         return self._hash
 
+    def _raise_if_pid_reused(self):
+        """Raises NoSuchProcess in case process PID has been reused."""
+        if not self.is_running() and self._pid_reused:
+            # We may directly raise NSP in here already if PID is just
+            # not running, but I prefer NSP to be raised naturally by
+            # the actual Process API call. This way unit tests will tell
+            # us if the API is broken (aka don't raise NSP when it
+            # should). We also remain consistent with all other "get"
+            # APIs which don't use _raise_if_pid_reused().
+            msg = "process no longer exists and its PID has been reused"
+            raise NoSuchProcess(self.pid, self._name, msg=msg)
+
     @property
     def pid(self):
         """The process PID."""
@@ -505,15 +534,18 @@ class Process(object):
         valid_names = _as_dict_attrnames
         if attrs is not None:
             if not isinstance(attrs, (list, tuple, set, frozenset)):
-                raise TypeError("invalid attrs type %s" % type(attrs))
+                msg = "invalid attrs type %s" % type(attrs)
+                raise TypeError(msg)
             attrs = set(attrs)
             invalid_names = attrs - valid_names
             if invalid_names:
-                raise ValueError("invalid attr name%s %s" % (
+                msg = "invalid attr name%s %s" % (
                     "s" if len(invalid_names) > 1 else "",
-                    ", ".join(map(repr, invalid_names))))
+                    ", ".join(map(repr, invalid_names)),
+                )
+                raise ValueError(msg)
 
-        retdict = dict()
+        retdict = {}
         ls = attrs or valid_names
         with self.oneshot():
             for name in ls:
@@ -570,7 +602,7 @@ class Process(object):
         It also checks if PID has been reused by another process in
         which case return False.
         """
-        if self._gone:
+        if self._gone or self._pid_reused:
             return False
         try:
             # Checking if PID is alive is not enough as the PID might
@@ -578,7 +610,8 @@ class Process(object):
             # verify process identity.
             # Process identity / uniqueness over time is guaranteed by
             # (PID + creation time) and that is verified in __eq__.
-            return self == Process(self.pid)
+            self._pid_reused = self != Process(self.pid)
+            return not self._pid_reused
         except ZombieProcess:
             # We should never get here as it's already handled in
             # Process.__init__; here just for extra safety.
@@ -601,6 +634,7 @@ class Process(object):
 
         # XXX should we check creation time here rather than in
         # Process.parent()?
+        self._raise_if_pid_reused()
         if POSIX:
             return self._proc.ppid()
         else:  # pragma: no cover
@@ -622,7 +656,12 @@ class Process(object):
             # Examples are "gnome-keyring-d" vs. "gnome-keyring-daemon".
             try:
                 cmdline = self.cmdline()
-            except AccessDenied:
+            except (AccessDenied, ZombieProcess):
+                # Just pass and return the truncated name: it's better
+                # than nothing. Note: there are actual cases where a
+                # zombie process can return a name() but not a
+                # cmdline(), see:
+                # https://github.com/giampaolo/psutil/issues/2239
                 pass
             else:
                 if cmdline:
@@ -638,6 +677,7 @@ class Process(object):
         May also be an empty string.
         The return value is cached after first call.
         """
+
         def guess_it(fallback):
             # try to guess exe from cmdline[0] in absence of a native
             # exe representation
@@ -647,9 +687,11 @@ class Process(object):
                 # Attempt to guess only in case of an absolute path.
                 # It is not safe otherwise as the process might have
                 # changed cwd.
-                if (os.path.isabs(exe) and
-                        os.path.isfile(exe) and
-                        os.access(exe, os.X_OK)):
+                if (
+                    os.path.isabs(exe)
+                    and os.path.isfile(exe)
+                    and os.access(exe, os.X_OK)
+                ):
                     return exe
             if isinstance(fallback, AccessDenied):
                 raise fallback
@@ -690,8 +732,8 @@ class Process(object):
         if POSIX:
             if pwd is None:
                 # might happen if python was installed from sources
-                raise ImportError(
-                    "requires pwd module shipped with standard python")
+                msg = "requires pwd module shipped with standard python"
+                raise ImportError(msg)
             real_uid = self.uids().real
             try:
                 return pwd.getpwuid(real_uid).pw_name
@@ -719,8 +761,7 @@ class Process(object):
         if value is None:
             return self._proc.nice_get()
         else:
-            if not self.is_running():
-                raise NoSuchProcess(self.pid, self._name)
+            self._raise_if_pid_reused()
             self._proc.nice_set(value)
 
     if POSIX:
@@ -779,9 +820,11 @@ class Process(object):
             """
             if ioclass is None:
                 if value is not None:
-                    raise ValueError("'ioclass' argument must be specified")
+                    msg = "'ioclass' argument must be specified"
+                    raise ValueError(msg)
                 return self._proc.ionice_get()
             else:
+                self._raise_if_pid_reused()
                 return self._proc.ionice_set(ioclass, value)
 
     # Linux / FreeBSD only
@@ -797,6 +840,8 @@ class Process(object):
             See "man prlimit" for further info.
             Available on Linux and FreeBSD only.
             """
+            if limits is not None:
+                self._raise_if_pid_reused()
             return self._proc.rlimit(resource, limits)
 
     # Windows, Linux and FreeBSD only
@@ -813,6 +858,7 @@ class Process(object):
             if cpus is None:
                 return sorted(set(self._proc.cpu_affinity_get()))
             else:
+                self._raise_if_pid_reused()
                 if not cpus:
                     if hasattr(self._proc, "_get_eligible_cpus"):
                         cpus = self._proc._get_eligible_cpus()
@@ -838,7 +884,8 @@ class Process(object):
 
         def environ(self):
             """The environment variables of the process as a dict.  Note: this
-            might not reflect changes made after the process started.  """
+            might not reflect changes made after the process started.
+            """
             return self._proc.environ()
 
     if WINDOWS:
@@ -869,7 +916,6 @@ class Process(object):
             """
             return self._proc.threads()
 
-    @_assert_pid_not_reused
     def children(self, recursive=False):
         """Return the children of this process as a list of Process
         instances, pre-emptively checking whether PID has been reused.
@@ -896,6 +942,7 @@ class Process(object):
         process Y won't be listed as the reference to process A
         is lost.
         """
+        self._raise_if_pid_reused()
         ppid_map = _ppid_map()
         ret = []
         if not recursive:
@@ -976,7 +1023,8 @@ class Process(object):
         """
         blocking = interval is not None and interval > 0.0
         if interval is not None and interval < 0:
-            raise ValueError("interval is not positive (got %r)" % interval)
+            msg = "interval is not positive (got %r)" % interval
+            raise ValueError(msg)
         num_cpus = cpu_count() or 1
 
         def timer():
@@ -1008,7 +1056,7 @@ class Process(object):
             # This is the utilization split evenly between all CPUs.
             # E.g. a busy loop process on a 2-CPU-cores system at this
             # point is reported as 50% instead of 100%.
-            overall_cpus_percent = ((delta_proc / delta_time) * 100)
+            overall_cpus_percent = (delta_proc / delta_time) * 100
         except ZeroDivisionError:
             # interval was too low
             return 0.0
@@ -1047,7 +1095,7 @@ class Process(object):
         """Return a namedtuple with variable fields depending on the
         platform, representing memory information about the process.
 
-        The "portable" fields available on all plaforms are `rss` and `vms`.
+        The "portable" fields available on all platforms are `rss` and `vms`.
 
         All numbers are expressed in bytes.
         """
@@ -1085,10 +1133,16 @@ class Process(object):
         """
         valid_types = list(_psplatform.pfullmem._fields)
         if memtype not in valid_types:
-            raise ValueError("invalid memtype %r; valid types are %r" % (
-                memtype, tuple(valid_types)))
-        fun = self.memory_info if memtype in _psplatform.pmem._fields else \
-            self.memory_full_info
+            msg = "invalid memtype %r; valid types are %r" % (
+                memtype,
+                tuple(valid_types),
+            )
+            raise ValueError(msg)
+        fun = (
+            self.memory_info
+            if memtype in _psplatform.pmem._fields
+            else self.memory_full_info
+        )
         metrics = fun()
         value = getattr(metrics, memtype)
 
@@ -1096,13 +1150,15 @@ class Process(object):
         total_phymem = _TOTAL_PHYMEM or virtual_memory().total
         if not total_phymem > 0:
             # we should never get here
-            raise ValueError(
-                "can't calculate process memory percent because "
-                "total physical system memory is not positive (%r)"
-                % total_phymem)
+            msg = (
+                "can't calculate process memory percent because total physical"
+                " system memory is not positive (%r)" % (total_phymem)
+            )
+            raise ValueError(msg)
         return (value / float(total_phymem)) * 100
 
     if hasattr(_psplatform.Process, "memory_maps"):
+
         def memory_maps(self, grouped=True):
             """Return process' mapped memory regions as a list of namedtuples
             whose fields are variable depending on the platform.
@@ -1164,14 +1220,18 @@ class Process(object):
     # --- signals
 
     if POSIX:
+
         def _send_signal(self, sig):
             assert not self.pid < 0, self.pid
+            self._raise_if_pid_reused()
             if self.pid == 0:
                 # see "man 2 kill"
-                raise ValueError(
+                msg = (
                     "preventing sending signal to process with PID 0 as it "
                     "would affect every process in the process group of the "
-                    "calling process (os.getpid()) instead of PID 0")
+                    "calling process (os.getpid()) instead of PID 0"
+                )
+                raise ValueError(msg)
             try:
                 os.kill(self.pid, sig)
             except ProcessLookupError:
@@ -1185,7 +1245,6 @@ class Process(object):
             except PermissionError:
                 raise AccessDenied(self.pid, self._name)
 
-    @_assert_pid_not_reused
     def send_signal(self, sig):
         """Send a signal *sig* to process pre-emptively checking
         whether PID has been reused (see signal module constants) .
@@ -1195,20 +1254,23 @@ class Process(object):
         if POSIX:
             self._send_signal(sig)
         else:  # pragma: no cover
+            self._raise_if_pid_reused()
+            if sig != signal.SIGTERM and not self.is_running():
+                msg = "process no longer exists"
+                raise NoSuchProcess(self.pid, self._name, msg=msg)
             self._proc.send_signal(sig)
 
-    @_assert_pid_not_reused
     def suspend(self):
         """Suspend process execution with SIGSTOP pre-emptively checking
         whether PID has been reused.
-        On Windows this has the effect ot suspending all process threads.
+        On Windows this has the effect of suspending all process threads.
         """
         if POSIX:
             self._send_signal(signal.SIGSTOP)
         else:  # pragma: no cover
+            self._raise_if_pid_reused()
             self._proc.suspend()
 
-    @_assert_pid_not_reused
     def resume(self):
         """Resume process execution with SIGCONT pre-emptively checking
         whether PID has been reused.
@@ -1217,9 +1279,9 @@ class Process(object):
         if POSIX:
             self._send_signal(signal.SIGCONT)
         else:  # pragma: no cover
+            self._raise_if_pid_reused()
             self._proc.resume()
 
-    @_assert_pid_not_reused
     def terminate(self):
         """Terminate the process with SIGTERM pre-emptively checking
         whether PID has been reused.
@@ -1228,9 +1290,9 @@ class Process(object):
         if POSIX:
             self._send_signal(signal.SIGTERM)
         else:  # pragma: no cover
+            self._raise_if_pid_reused()
             self._proc.kill()
 
-    @_assert_pid_not_reused
     def kill(self):
         """Kill the current process with SIGKILL pre-emptively checking
         whether PID has been reused.
@@ -1238,6 +1300,7 @@ class Process(object):
         if POSIX:
             self._send_signal(signal.SIGKILL)
         else:  # pragma: no cover
+            self._raise_if_pid_reused()
             self._proc.kill()
 
     def wait(self, timeout=None):
@@ -1255,7 +1318,8 @@ class Process(object):
         To wait for multiple Process(es) use psutil.wait_procs().
         """
         if timeout is not None and not timeout >= 0:
-            raise ValueError("timeout must be a positive integer")
+            msg = "timeout must be a positive integer"
+            raise ValueError(msg)
         if self._exitcode is not _SENTINEL:
             return self._exitcode
         self._exitcode = self._proc.wait(timeout)
@@ -1263,11 +1327,13 @@ class Process(object):
 
 
 # The valid attr names which can be processed by Process.as_dict().
+# fmt: off
 _as_dict_attrnames = set(
     [x for x in dir(Process) if not x.startswith('_') and x not in
-     ['send_signal', 'suspend', 'resume', 'terminate', 'kill', 'wait',
+     {'send_signal', 'suspend', 'resume', 'terminate', 'kill', 'wait',
       'is_running', 'as_dict', 'parent', 'parents', 'children', 'rlimit',
-      'memory_info_ex', 'oneshot']])
+      'memory_info_ex', 'oneshot'}])
+# fmt: on
 
 
 # =====================================================================
@@ -1298,7 +1364,7 @@ class Popen(Process):
       >>> p.username()
       'giampaolo'
       >>> p.communicate()
-      ('hi\n', None)
+      ('hi', None)
       >>> p.terminate()
       >>> p.wait(timeout=2)
       0
@@ -1343,13 +1409,16 @@ class Popen(Process):
             try:
                 return object.__getattribute__(self.__subproc, name)
             except AttributeError:
-                raise AttributeError("%s instance has no attribute '%s'"
-                                     % (self.__class__.__name__, name))
+                msg = "%s instance has no attribute '%s'" % (
+                    self.__class__.__name__,
+                    name,
+                )
+                raise AttributeError(msg)
 
     def wait(self, timeout=None):
         if self.__subproc.returncode is not None:
             return self.__subproc.returncode
-        ret = super(Popen, self).wait(timeout)
+        ret = super(Popen, self).wait(timeout)  # noqa
         self.__subproc.returncode = ret
         return ret
 
@@ -1386,7 +1455,6 @@ def pid_exists(pid):
 
 
 _pmap = {}
-_lock = threading.Lock()
 
 
 def process_iter(attrs=None, ad_value=None):
@@ -1410,58 +1478,60 @@ def process_iter(attrs=None, ad_value=None):
     If *attrs* is an empty list it will retrieve all process info
     (slow).
     """
+    global _pmap
+
     def add(pid):
         proc = Process(pid)
         if attrs is not None:
             proc.info = proc.as_dict(attrs=attrs, ad_value=ad_value)
-        with _lock:
-            _pmap[proc.pid] = proc
+        pmap[proc.pid] = proc
         return proc
 
     def remove(pid):
-        with _lock:
-            _pmap.pop(pid, None)
+        pmap.pop(pid, None)
 
+    pmap = _pmap.copy()
     a = set(pids())
-    b = set(_pmap.keys())
+    b = set(pmap.keys())
     new_pids = a - b
     gone_pids = b - a
     for pid in gone_pids:
         remove(pid)
-
-    with _lock:
-        ls = sorted(list(_pmap.items()) +
-                    list(dict.fromkeys(new_pids).items()))
-
-    for pid, proc in ls:
-        try:
-            if proc is None:  # new process
-                yield add(pid)
-            else:
-                # use is_running() to check whether PID has been reused by
-                # another process in which case yield a new Process instance
-                if proc.is_running():
-                    if attrs is not None:
-                        proc.info = proc.as_dict(
-                            attrs=attrs, ad_value=ad_value)
-                    yield proc
-                else:
+    try:
+        ls = sorted(list(pmap.items()) + list(dict.fromkeys(new_pids).items()))
+        for pid, proc in ls:
+            try:
+                if proc is None:  # new process
                     yield add(pid)
-        except NoSuchProcess:
-            remove(pid)
-        except AccessDenied:
-            # Process creation time can't be determined hence there's
-            # no way to tell whether the pid of the cached process
-            # has been reused. Just return the cached version.
-            if proc is None and pid in _pmap:
-                try:
-                    yield _pmap[pid]
-                except KeyError:
-                    # If we get here it is likely that 2 threads were
-                    # using process_iter().
-                    pass
-            else:
-                raise
+                else:
+                    # use is_running() to check whether PID has been
+                    # reused by another process in which case yield a
+                    # new Process instance
+                    if proc.is_running():
+                        if attrs is not None:
+                            proc.info = proc.as_dict(
+                                attrs=attrs, ad_value=ad_value
+                            )
+                        yield proc
+                    else:
+                        yield add(pid)
+            except NoSuchProcess:
+                remove(pid)
+            except AccessDenied:
+                # Process creation time can't be determined hence there's
+                # no way to tell whether the pid of the cached process
+                # has been reused. Just return the cached version.
+                if proc is None and pid in pmap:
+                    try:
+                        yield pmap[pid]
+                    except KeyError:
+                        # If we get here it is likely that 2 threads were
+                        # using process_iter().
+                        pass
+                else:
+                    raise
+    finally:
+        _pmap = pmap
 
 
 def wait_procs(procs, timeout=None, callback=None):
@@ -1500,11 +1570,14 @@ def wait_procs(procs, timeout=None, callback=None):
     >>> for p in alive:
     ...     p.kill()
     """
+
     def check_gone(proc, timeout):
         try:
             returncode = proc.wait(timeout=timeout)
         except TimeoutExpired:
             pass
+        except _SubprocessTimeoutExpired:
+            pass
         else:
             if returncode is not None or not proc.is_running():
                 # Set new Process instance attribute.
@@ -1519,7 +1592,8 @@ def wait_procs(procs, timeout=None, callback=None):
     gone = set()
     alive = set(procs)
     if callback is not None and not callable(callback):
-        raise TypeError("callback %r is not a callable" % callable)
+        msg = "callback %r is not a callable" % callback
+        raise TypeError(msg)
     if timeout is not None:
         deadline = _timer() + timeout
 
@@ -1575,7 +1649,7 @@ def cpu_count(logical=True):
     if logical:
         ret = _psplatform.cpu_count_logical()
     else:
-        ret = _psplatform.cpu_count_physical()
+        ret = _psplatform.cpu_count_cores()
     if ret is not None and ret < 1:
         ret = None
     return ret
@@ -1610,16 +1684,18 @@ def cpu_times(percpu=False):
 
 
 try:
-    _last_cpu_times = cpu_times()
-except Exception:
+    _last_cpu_times = {threading.current_thread().ident: cpu_times()}
+except Exception:  # noqa: BLE001
     # Don't want to crash at import time.
-    _last_cpu_times = None
+    _last_cpu_times = {}
 
 try:
-    _last_per_cpu_times = cpu_times(percpu=True)
-except Exception:
+    _last_per_cpu_times = {
+        threading.current_thread().ident: cpu_times(percpu=True)
+    }
+except Exception:  # noqa: BLE001
     # Don't want to crash at import time.
-    _last_per_cpu_times = None
+    _last_per_cpu_times = {}
 
 
 def _cpu_tot_time(times):
@@ -1713,15 +1789,14 @@ def cpu_percent(interval=None, percpu=False):
       2.9
       >>>
     """
-    global _last_cpu_times
-    global _last_per_cpu_times
+    tid = threading.current_thread().ident
     blocking = interval is not None and interval > 0.0
     if interval is not None and interval < 0:
-        raise ValueError("interval is not positive (got %r)" % interval)
+        msg = "interval is not positive (got %r)" % interval
+        raise ValueError(msg)
 
     def calculate(t1, t2):
         times_delta = _cpu_times_deltas(t1, t2)
-
         all_delta = _cpu_tot_time(times_delta)
         busy_delta = _cpu_busy_time(times_delta)
 
@@ -1738,14 +1813,9 @@ def cpu_percent(interval=None, percpu=False):
             t1 = cpu_times()
             time.sleep(interval)
         else:
-            t1 = _last_cpu_times
-            if t1 is None:
-                # Something bad happened at import time. We'll
-                # get a meaningful result on the next call. See:
-                # https://github.com/giampaolo/psutil/pull/715
-                t1 = cpu_times()
-        _last_cpu_times = cpu_times()
-        return calculate(t1, _last_cpu_times)
+            t1 = _last_cpu_times.get(tid) or cpu_times()
+        _last_cpu_times[tid] = cpu_times()
+        return calculate(t1, _last_cpu_times[tid])
     # per-cpu usage
     else:
         ret = []
@@ -1753,23 +1823,17 @@ def cpu_percent(interval=None, percpu=False):
             tot1 = cpu_times(percpu=True)
             time.sleep(interval)
         else:
-            tot1 = _last_per_cpu_times
-            if tot1 is None:
-                # Something bad happened at import time. We'll
-                # get a meaningful result on the next call. See:
-                # https://github.com/giampaolo/psutil/pull/715
-                tot1 = cpu_times(percpu=True)
-        _last_per_cpu_times = cpu_times(percpu=True)
-        for t1, t2 in zip(tot1, _last_per_cpu_times):
+            tot1 = _last_per_cpu_times.get(tid) or cpu_times(percpu=True)
+        _last_per_cpu_times[tid] = cpu_times(percpu=True)
+        for t1, t2 in zip(tot1, _last_per_cpu_times[tid]):
             ret.append(calculate(t1, t2))
         return ret
 
 
-# Use separate global vars for cpu_times_percent() so that it's
-# independent from cpu_percent() and they can both be used within
-# the same program.
-_last_cpu_times_2 = _last_cpu_times
-_last_per_cpu_times_2 = _last_per_cpu_times
+# Use a separate dict for cpu_times_percent(), so it's independent from
+# cpu_percent() and they can both be used within the same program.
+_last_cpu_times_2 = _last_cpu_times.copy()
+_last_per_cpu_times_2 = _last_per_cpu_times.copy()
 
 
 def cpu_times_percent(interval=None, percpu=False):
@@ -1785,11 +1849,11 @@ def cpu_times_percent(interval=None, percpu=False):
     *interval* and *percpu* arguments have the same meaning as in
     cpu_percent().
     """
-    global _last_cpu_times_2
-    global _last_per_cpu_times_2
+    tid = threading.current_thread().ident
     blocking = interval is not None and interval > 0.0
     if interval is not None and interval < 0:
-        raise ValueError("interval is not positive (got %r)" % interval)
+        msg = "interval is not positive (got %r)" % interval
+        raise ValueError(msg)
 
     def calculate(t1, t2):
         nums = []
@@ -1814,14 +1878,9 @@ def cpu_times_percent(interval=None, percpu=False):
             t1 = cpu_times()
             time.sleep(interval)
         else:
-            t1 = _last_cpu_times_2
-            if t1 is None:
-                # Something bad happened at import time. We'll
-                # get a meaningful result on the next call. See:
-                # https://github.com/giampaolo/psutil/pull/715
-                t1 = cpu_times()
-        _last_cpu_times_2 = cpu_times()
-        return calculate(t1, _last_cpu_times_2)
+            t1 = _last_cpu_times_2.get(tid) or cpu_times()
+        _last_cpu_times_2[tid] = cpu_times()
+        return calculate(t1, _last_cpu_times_2[tid])
     # per-cpu usage
     else:
         ret = []
@@ -1829,14 +1888,9 @@ def cpu_times_percent(interval=None, percpu=False):
             tot1 = cpu_times(percpu=True)
             time.sleep(interval)
         else:
-            tot1 = _last_per_cpu_times_2
-            if tot1 is None:
-                # Something bad happened at import time. We'll
-                # get a meaningful result on the next call. See:
-                # https://github.com/giampaolo/psutil/pull/715
-                tot1 = cpu_times(percpu=True)
-        _last_per_cpu_times_2 = cpu_times(percpu=True)
-        for t1, t2 in zip(tot1, _last_per_cpu_times_2):
+            tot1 = _last_per_cpu_times_2.get(tid) or cpu_times(percpu=True)
+        _last_per_cpu_times_2[tid] = cpu_times(percpu=True)
+        for t1, t2 in zip(tot1, _last_per_cpu_times_2[tid]):
             ret.append(calculate(t1, t2))
         return ret
 
@@ -1849,7 +1903,7 @@ def cpu_stats():
 if hasattr(_psplatform, "cpu_freq"):
 
     def cpu_freq(percpu=False):
-        """Return CPU frequency as a nameduple including current,
+        """Return CPU frequency as a namedtuple including current,
         min and max frequency expressed in Mhz.
 
         If *percpu* is True and the system supports per-cpu frequency
@@ -2004,6 +2058,7 @@ def disk_partitions(all=False):
     If *all* parameter is False return physical devices only and ignore
     all others.
     """
+
     def pathconf(path, name):
         try:
             return os.pathconf(path, name)
@@ -2016,7 +2071,8 @@ def disk_partitions(all=False):
         for item in ret:
             nt = item._replace(
                 maxfile=pathconf(item.mountpoint, 'PC_NAME_MAX'),
-                maxpath=pathconf(item.mountpoint, 'PC_PATH_MAX'))
+                maxpath=pathconf(item.mountpoint, 'PC_PATH_MAX'),
+            )
             new.append(nt)
         return new
     else:
@@ -2067,11 +2123,12 @@ def disk_io_counters(perdisk=False, nowrap=True):
             rawdict[disk] = nt(*fields)
         return rawdict
     else:
-        return nt(*[sum(x) for x in zip(*rawdict.values())])
+        return nt(*(sum(x) for x in zip(*rawdict.values())))
 
 
 disk_io_counters.cache_clear = functools.partial(
-    _wrap_numbers.cache_clear, 'psutil.disk_io_counters')
+    _wrap_numbers.cache_clear, 'psutil.disk_io_counters'
+)
 disk_io_counters.cache_clear.__doc__ = "Clears nowrap argument cache"
 
 
@@ -2103,7 +2160,7 @@ def net_io_counters(pernic=False, nowrap=True):
     and wrap (restart from 0) and add "old value" to "new value" so that
     the returned numbers will always be increasing or remain the same,
     but never decrease.
-    "disk_io_counters.cache_clear()" can be used to invalidate the
+    "net_io_counters.cache_clear()" can be used to invalidate the
     cache.
     """
     rawdict = _psplatform.net_io_counters()
@@ -2120,7 +2177,8 @@ def net_io_counters(pernic=False, nowrap=True):
 
 
 net_io_counters.cache_clear = functools.partial(
-    _wrap_numbers.cache_clear, 'psutil.net_io_counters')
+    _wrap_numbers.cache_clear, 'psutil.net_io_counters'
+)
 net_io_counters.cache_clear.__doc__ = "Clears nowrap argument cache"
 
 
@@ -2171,7 +2229,7 @@ def net_if_addrs():
     Note: you can have more than one address of the same family
     associated with each interface.
     """
-    has_enums = sys.version_info >= (3, 4)
+    has_enums = _PY3
     if has_enums:
         import socket
     rawlist = _psplatform.net_if_addrs()
@@ -2184,8 +2242,10 @@ def net_if_addrs():
             except ValueError:
                 if WINDOWS and fam == -1:
                     fam = _psplatform.AF_LINK
-                elif (hasattr(_psplatform, "AF_LINK") and
-                        _psplatform.AF_LINK == fam):
+                elif (
+                    hasattr(_psplatform, "AF_LINK")
+                    and fam == _psplatform.AF_LINK
+                ):
                     # Linux defines AF_LINK as an alias for AF_PACKET.
                     # We re-set the family here so that repr(family)
                     # will show AF_LINK rather than AF_PACKET
@@ -2232,6 +2292,7 @@ if hasattr(_psplatform, "sensors_temperatures"):
         All temperatures are expressed in celsius unless *fahrenheit*
         is set to True.
         """
+
         def convert(n):
             if n is not None:
                 return (float(n) * 9 / 5) + 32 if fahrenheit else n
@@ -2252,7 +2313,8 @@ if hasattr(_psplatform, "sensors_temperatures"):
                     high = critical
 
                 ret[name].append(
-                    _common.shwtemp(label, current, high, critical))
+                    _common.shwtemp(label, current, high, critical)
+                )
 
         return dict(ret)
 
@@ -2338,16 +2400,28 @@ if WINDOWS:
 # =====================================================================
 
 
+def _set_debug(value):
+    """Enable or disable PSUTIL_DEBUG option, which prints debugging
+    messages to stderr.
+    """
+    import psutil._common
+
+    psutil._common.PSUTIL_DEBUG = bool(value)
+    _psplatform.cext.set_debug(bool(value))
+
+
 def test():  # pragma: no cover
     from ._common import bytes2human
     from ._compat import get_terminal_size
 
     today_day = datetime.date.today()
+    # fmt: off
     templ = "%-10s %5s %5s %7s %7s %5s %6s %6s %6s  %s"
     attrs = ['pid', 'memory_percent', 'name', 'cmdline', 'cpu_times',
              'create_time', 'memory_info', 'status', 'nice', 'username']
     print(templ % ("USER", "PID", "%MEM", "VSZ", "RSS", "NICE",  # NOQA
                    "STATUS", "START", "TIME", "CMDLINE"))
+    # fmt: on
     for p in process_iter(attrs, ad_value=None):
         if p.info['create_time']:
             ctime = datetime.datetime.fromtimestamp(p.info['create_time'])
@@ -2358,8 +2432,9 @@ def test():  # pragma: no cover
         else:
             ctime = ''
         if p.info['cpu_times']:
-            cputime = time.strftime("%M:%S",
-                                    time.localtime(sum(p.info['cpu_times'])))
+            cputime = time.strftime(
+                "%M:%S", time.localtime(sum(p.info['cpu_times']))
+            )
         else:
             cputime = ''
 
@@ -2372,12 +2447,21 @@ def test():  # pragma: no cover
         if user and WINDOWS and '\\' in user:
             user = user.split('\\')[1]
         user = user[:9]
-        vms = bytes2human(p.info['memory_info'].vms) if \
-            p.info['memory_info'] is not None else ''
-        rss = bytes2human(p.info['memory_info'].rss) if \
-            p.info['memory_info'] is not None else ''
-        memp = round(p.info['memory_percent'], 1) if \
-            p.info['memory_percent'] is not None else ''
+        vms = (
+            bytes2human(p.info['memory_info'].vms)
+            if p.info['memory_info'] is not None
+            else ''
+        )
+        rss = (
+            bytes2human(p.info['memory_info'].rss)
+            if p.info['memory_info'] is not None
+            else ''
+        )
+        memp = (
+            round(p.info['memory_percent'], 1)
+            if p.info['memory_percent'] is not None
+            else ''
+        )
         nice = int(p.info['nice']) if p.info['nice'] else ''
         if p.info['cmdline']:
             cmdline = ' '.join(p.info['cmdline'])
@@ -2395,13 +2479,14 @@ def test():  # pragma: no cover
             status,
             ctime,
             cputime,
-            cmdline)
-        print(line[:get_terminal_size()[0]])  # NOQA
+            cmdline,
+        )
+        print(line[: get_terminal_size()[0]])  # NOQA
 
 
 del memoize_when_activated, division
 if sys.version_info[0] < 3:
-    del num, x
+    del num, x  # noqa
 
 if __name__ == "__main__":
     test()
diff --git a/contrib/python/psutil/py3/psutil/_common.py b/contrib/python/psutil/py3/psutil/_common.py
index 771461d692..6989feafda 100644
--- a/contrib/python/psutil/py3/psutil/_common.py
+++ b/contrib/python/psutil/py3/psutil/_common.py
@@ -7,8 +7,10 @@
 # Note: this module is imported by setup.py so it should not import
 # psutil or third-party modules.
 
-from __future__ import division, print_function
+from __future__ import division
+from __future__ import print_function
 
+import collections
 import contextlib
 import errno
 import functools
@@ -18,12 +20,12 @@ import stat
 import sys
 import threading
 import warnings
-from collections import defaultdict
 from collections import namedtuple
 from socket import AF_INET
 from socket import SOCK_DGRAM
 from socket import SOCK_STREAM
 
+
 try:
     from socket import AF_INET6
 except ImportError:
@@ -33,15 +35,19 @@ try:
 except ImportError:
     AF_UNIX = None
 
-if sys.version_info >= (3, 4):
+
+# can't take it from _common.py as this script is imported by setup.py
+PY3 = sys.version_info[0] >= 3
+if PY3:
     import enum
 else:
     enum = None
 
 
-# can't take it from _common.py as this script is imported by setup.py
-PY3 = sys.version_info[0] == 3
+PSUTIL_DEBUG = bool(os.getenv('PSUTIL_DEBUG'))
+_DEFAULT = object()
 
+# fmt: off
 __all__ = [
     # OS constants
     'FREEBSD', 'BSD', 'LINUX', 'NETBSD', 'OPENBSD', 'MACOS', 'OSX', 'POSIX',
@@ -67,10 +73,12 @@ __all__ = [
     'conn_tmap', 'deprecated_method', 'isfile_strict', 'memoize',
     'parse_environ_block', 'path_exists_strict', 'usage_percent',
     'supports_ipv6', 'sockfam_to_enum', 'socktype_to_enum', "wrap_numbers",
+    'open_text', 'open_binary', 'cat', 'bcat',
     'bytes2human', 'conn_to_ntuple', 'debug',
     # shell utils
     'hilite', 'term_supports_colors', 'print_color',
 ]
+# fmt: on
 
 
 # ===================================================================
@@ -83,7 +91,7 @@ WINDOWS = os.name == "nt"
 LINUX = sys.platform.startswith("linux")
 MACOS = sys.platform.startswith("darwin")
 OSX = MACOS  # deprecated alias
-FREEBSD = sys.platform.startswith("freebsd")
+FREEBSD = sys.platform.startswith(("freebsd", "midnightbsd"))
 OPENBSD = sys.platform.startswith("openbsd")
 NETBSD = sys.platform.startswith("netbsd")
 BSD = FREEBSD or OPENBSD or NETBSD
@@ -132,6 +140,7 @@ if enum is None:
     NIC_DUPLEX_HALF = 1
     NIC_DUPLEX_UNKNOWN = 0
 else:
+
     class NicDuplex(enum.IntEnum):
         NIC_DUPLEX_FULL = 2
         NIC_DUPLEX_HALF = 1
@@ -144,6 +153,7 @@ if enum is None:
     POWER_TIME_UNKNOWN = -1
     POWER_TIME_UNLIMITED = -2
 else:
+
     class BatteryTime(enum.IntEnum):
         POWER_TIME_UNKNOWN = -1
         POWER_TIME_UNLIMITED = -2
@@ -168,6 +178,7 @@ else:
 
 # --- for system functions
 
+# fmt: off
 # psutil.swap_memory()
 sswap = namedtuple('sswap', ['total', 'used', 'free', 'percent', 'sin',
                              'sout'])
@@ -194,7 +205,8 @@ sconn = namedtuple('sconn', ['fd', 'family', 'type', 'laddr', 'raddr',
 snicaddr = namedtuple('snicaddr',
                       ['family', 'address', 'netmask', 'broadcast', 'ptp'])
 # psutil.net_if_stats()
-snicstats = namedtuple('snicstats', ['isup', 'duplex', 'speed', 'mtu'])
+snicstats = namedtuple('snicstats',
+                       ['isup', 'duplex', 'speed', 'mtu', 'flags'])
 # psutil.cpu_stats()
 scpustats = namedtuple(
     'scpustats', ['ctx_switches', 'interrupts', 'soft_interrupts', 'syscalls'])
@@ -207,12 +219,14 @@ shwtemp = namedtuple(
 sbattery = namedtuple('sbattery', ['percent', 'secsleft', 'power_plugged'])
 # psutil.sensors_fans()
 sfan = namedtuple('sfan', ['label', 'current'])
+# fmt: on
 
 # --- for Process methods
 
 # psutil.Process.cpu_times()
-pcputimes = namedtuple('pcputimes',
-                       ['user', 'system', 'children_user', 'children_system'])
+pcputimes = namedtuple(
+    'pcputimes', ['user', 'system', 'children_user', 'children_system']
+)
 # psutil.Process.open_files()
 popenfile = namedtuple('popenfile', ['path', 'fd'])
 # psutil.Process.threads()
@@ -222,15 +236,17 @@ puids = namedtuple('puids', ['real', 'effective', 'saved'])
 # psutil.Process.gids()
 pgids = namedtuple('pgids', ['real', 'effective', 'saved'])
 # psutil.Process.io_counters()
-pio = namedtuple('pio', ['read_count', 'write_count',
-                         'read_bytes', 'write_bytes'])
+pio = namedtuple(
+    'pio', ['read_count', 'write_count', 'read_bytes', 'write_bytes']
+)
 # psutil.Process.ionice()
 pionice = namedtuple('pionice', ['ioclass', 'value'])
 # psutil.Process.ctx_switches()
 pctxsw = namedtuple('pctxsw', ['voluntary', 'involuntary'])
 # psutil.Process.connections()
-pconn = namedtuple('pconn', ['fd', 'family', 'type', 'laddr', 'raddr',
-                             'status'])
+pconn = namedtuple(
+    'pconn', ['fd', 'family', 'type', 'laddr', 'raddr', 'status']
+)
 
 # psutil.connections() and psutil.Process.connections()
 addr = namedtuple('addr', ['ip', 'port'])
@@ -259,9 +275,7 @@ if AF_INET6 is not None:
     })
 
 if AF_UNIX is not None:
-    conn_tmap.update({
-        "unix": ([AF_UNIX], [SOCK_STREAM, SOCK_DGRAM]),
-    })
+    conn_tmap.update({"unix": ([AF_UNIX], [SOCK_STREAM, SOCK_DGRAM])})
 
 
 # =====================================================================
@@ -273,36 +287,49 @@ class Error(Exception):
     """Base exception class. All other psutil exceptions inherit
     from this one.
     """
+
     __module__ = 'psutil'
 
-    def __init__(self, msg=""):
-        Exception.__init__(self, msg)
-        self.msg = msg
+    def _infodict(self, attrs):
+        info = collections.OrderedDict()
+        for name in attrs:
+            value = getattr(self, name, None)
+            if value:  # noqa
+                info[name] = value
+            elif name == "pid" and value == 0:
+                info[name] = value
+        return info
+
+    def __str__(self):
+        # invoked on `raise Error`
+        info = self._infodict(("pid", "ppid", "name"))
+        if info:
+            details = "(%s)" % ", ".join(
+                ["%s=%r" % (k, v) for k, v in info.items()]
+            )
+        else:
+            details = None
+        return " ".join([x for x in (getattr(self, "msg", ""), details) if x])
 
     def __repr__(self):
-        ret = "psutil.%s %s" % (self.__class__.__name__, self.msg)
-        return ret.strip()
-
-    __str__ = __repr__
+        # invoked on `repr(Error)`
+        info = self._infodict(("pid", "ppid", "name", "seconds", "msg"))
+        details = ", ".join(["%s=%r" % (k, v) for k, v in info.items()])
+        return "psutil.%s(%s)" % (self.__class__.__name__, details)
 
 
 class NoSuchProcess(Error):
     """Exception raised when a process with a certain PID doesn't
     or no longer exists.
     """
+
     __module__ = 'psutil'
 
     def __init__(self, pid, name=None, msg=None):
-        Error.__init__(self, msg)
+        Error.__init__(self)
         self.pid = pid
         self.name = name
-        self.msg = msg
-        if msg is None:
-            if name:
-                details = "(pid=%s, name=%s)" % (self.pid, repr(self.name))
-            else:
-                details = "(pid=%s)" % self.pid
-            self.msg = "process no longer exists " + details
+        self.msg = msg or "process no longer exists"
 
 
 class ZombieProcess(NoSuchProcess):
@@ -312,57 +339,40 @@ class ZombieProcess(NoSuchProcess):
     On Linux all zombie processes are querable (hence this is never
     raised). Windows doesn't have zombie processes.
     """
+
     __module__ = 'psutil'
 
     def __init__(self, pid, name=None, ppid=None, msg=None):
-        NoSuchProcess.__init__(self, msg)
-        self.pid = pid
+        NoSuchProcess.__init__(self, pid, name, msg)
         self.ppid = ppid
-        self.name = name
-        self.msg = msg
-        if msg is None:
-            args = ["pid=%s" % pid]
-            if name:
-                args.append("name=%s" % repr(self.name))
-            if ppid:
-                args.append("ppid=%s" % self.ppid)
-            details = "(%s)" % ", ".join(args)
-            self.msg = "process still exists but it's a zombie " + details
+        self.msg = msg or "PID still exists but it's a zombie"
 
 
 class AccessDenied(Error):
     """Exception raised when permission to perform an action is denied."""
+
     __module__ = 'psutil'
 
     def __init__(self, pid=None, name=None, msg=None):
-        Error.__init__(self, msg)
+        Error.__init__(self)
         self.pid = pid
         self.name = name
-        self.msg = msg
-        if msg is None:
-            if (pid is not None) and (name is not None):
-                self.msg = "(pid=%s, name=%s)" % (pid, repr(name))
-            elif (pid is not None):
-                self.msg = "(pid=%s)" % self.pid
-            else:
-                self.msg = ""
+        self.msg = msg or ""
 
 
 class TimeoutExpired(Error):
     """Raised on Process.wait(timeout) if timeout expires and process
     is still alive.
     """
+
     __module__ = 'psutil'
 
     def __init__(self, seconds, pid=None, name=None):
-        Error.__init__(self, "timeout after %s seconds" % seconds)
+        Error.__init__(self)
         self.seconds = seconds
         self.pid = pid
         self.name = name
-        if (pid is not None) and (name is not None):
-            self.msg += " (pid=%s, name=%s)" % (pid, repr(name))
-        elif (pid is not None):
-            self.msg += " (pid=%s)" % self.pid
+        self.msg = "timeout after %s seconds" % seconds
 
 
 # ===================================================================
@@ -370,6 +380,26 @@ class TimeoutExpired(Error):
 # ===================================================================
 
 
+# This should be in _compat.py rather than here, but does not work well
+# with setup.py importing this module via a sys.path trick.
+if PY3:
+    if isinstance(__builtins__, dict):  # cpython
+        exec_ = __builtins__["exec"]
+    else:  # pypy
+        exec_ = getattr(__builtins__, "exec")  # noqa
+
+    exec_("""def raise_from(value, from_value):
+    try:
+        raise value from from_value
+    finally:
+        value = None
+    """)
+else:
+
+    def raise_from(value, from_value):
+        raise value
+
+
 def usage_percent(used, total, round_=None):
     """Calculate percentage usage of 'used' against 'total'."""
     try:
@@ -395,14 +425,27 @@ def memoize(fun):
     1
     >>> foo.cache_clear()
     >>>
+
+    It supports:
+     - functions
+     - classes (acts as a @singleton)
+     - staticmethods
+     - classmethods
+
+    It does NOT support:
+     - methods
     """
+
     @functools.wraps(fun)
     def wrapper(*args, **kwargs):
         key = (args, frozenset(sorted(kwargs.items())))
         try:
             return cache[key]
         except KeyError:
-            ret = cache[key] = fun(*args, **kwargs)
+            try:
+                ret = cache[key] = fun(*args, **kwargs)
+            except Exception as err:  # noqa: BLE001
+                raise raise_from(err, None)
             return ret
 
     def cache_clear():
@@ -440,6 +483,7 @@ def memoize_when_activated(fun):
     >>> foo()
     >>>
     """
+
     @functools.wraps(fun)
     def wrapper(self):
         try:
@@ -447,16 +491,29 @@ def memoize_when_activated(fun):
             ret = self._cache[fun]
         except AttributeError:
             # case 2: we never entered oneshot() ctx
-            return fun(self)
+            try:
+                return fun(self)
+            except Exception as err:  # noqa: BLE001
+                raise raise_from(err, None)
         except KeyError:
             # case 3: we entered oneshot() ctx but there's no cache
             # for this entry yet
-            ret = self._cache[fun] = fun(self)
+            try:
+                ret = fun(self)
+            except Exception as err:  # noqa: BLE001
+                raise raise_from(err, None)
+            try:
+                self._cache[fun] = ret
+            except AttributeError:
+                # multi-threading race condition, see:
+                # https://github.com/giampaolo/psutil/issues/1948
+                pass
         return ret
 
     def cache_activate(proc):
         """Activate cache. Expects a Process instance. Cache will be
-        stored as a "_cache" instance attribute."""
+        stored as a "_cache" instance attribute.
+        """
         proc._cache = {}
 
     def cache_deactivate(proc):
@@ -474,7 +531,7 @@ def memoize_when_activated(fun):
 def isfile_strict(path):
     """Same as os.path.isfile() but does not swallow EACCES / EPERM
     exceptions, see:
-    http://mail.python.org/pipermail/python-dev/2012-June/120787.html
+    http://mail.python.org/pipermail/python-dev/2012-June/120787.html.
     """
     try:
         st = os.stat(path)
@@ -488,8 +545,8 @@ def isfile_strict(path):
 
 def path_exists_strict(path):
     """Same as os.path.exists() but does not swallow EACCES / EPERM
-    exceptions, see:
-    http://mail.python.org/pipermail/python-dev/2012-June/120787.html
+    exceptions. See:
+    http://mail.python.org/pipermail/python-dev/2012-June/120787.html.
     """
     try:
         os.stat(path)
@@ -533,7 +590,7 @@ def parse_environ_block(data):
         equal_pos = data.find("=", pos, next_pos)
         if equal_pos > pos:
             key = data[pos:equal_pos]
-            value = data[equal_pos + 1:next_pos]
+            value = data[equal_pos + 1 : next_pos]
             # Windows expects environment variables to be uppercase only
             if WINDOWS_:
                 key = key.upper()
@@ -592,9 +649,12 @@ def deprecated_method(replacement):
     """A decorator which can be used to mark a method as deprecated
     'replcement' is the method name which will be called instead.
     """
+
     def outer(fun):
         msg = "%s() is deprecated and will be removed; use %s() instead" % (
-            fun.__name__, replacement)
+            fun.__name__,
+            replacement,
+        )
         if fun.__doc__ is None:
             fun.__doc__ = msg
 
@@ -602,7 +662,9 @@ def deprecated_method(replacement):
         def inner(self, *args, **kwargs):
             warnings.warn(msg, category=DeprecationWarning, stacklevel=2)
             return getattr(self, replacement)(*args, **kwargs)
+
         return inner
+
     return outer
 
 
@@ -622,8 +684,8 @@ class _WrapNumbers:
         assert name not in self.reminders
         assert name not in self.reminder_keys
         self.cache[name] = input_dict
-        self.reminders[name] = defaultdict(int)
-        self.reminder_keys[name] = defaultdict(set)
+        self.reminders[name] = collections.defaultdict(int)
+        self.reminder_keys[name] = collections.defaultdict(set)
 
     def _remove_dead_reminders(self, input_dict, name):
         """In case the number of keys changed between calls (e.g. a
@@ -638,7 +700,7 @@ class _WrapNumbers:
 
     def run(self, input_dict, name):
         """Cache dict and sum numbers which overflow and wrap.
-        Return an updated copy of `input_dict`
+        Return an updated copy of `input_dict`.
         """
         if name not in self.cache:
             # This was the first call.
@@ -649,7 +711,7 @@ class _WrapNumbers:
 
         old_dict = self.cache[name]
         new_dict = {}
-        for key in input_dict.keys():
+        for key in input_dict:
             input_tuple = input_dict[key]
             try:
                 old_tuple = old_dict[key]
@@ -707,27 +769,79 @@ wrap_numbers.cache_clear = _wn.cache_clear
 wrap_numbers.cache_info = _wn.cache_info
 
 
-def open_binary(fname, **kwargs):
-    return open(fname, "rb", **kwargs)
+# The read buffer size for open() builtin. This (also) dictates how
+# much data we read(2) when iterating over file lines as in:
+#   >>> with open(file) as f:
+#   ...    for line in f:
+#   ...        ...
+# Default per-line buffer size for binary files is 1K. For text files
+# is 8K. We use a bigger buffer (32K) in order to have more consistent
+# results when reading /proc pseudo files on Linux, see:
+# https://github.com/giampaolo/psutil/issues/2050
+# On Python 2 this also speeds up the reading of big files:
+# (namely /proc/{pid}/smaps and /proc/net/*):
+# https://github.com/giampaolo/psutil/issues/708
+FILE_READ_BUFFER_SIZE = 32 * 1024
 
 
-def open_text(fname, **kwargs):
+def open_binary(fname):
+    return open(fname, "rb", buffering=FILE_READ_BUFFER_SIZE)
+
+
+def open_text(fname):
     """On Python 3 opens a file in text mode by using fs encoding and
     a proper en/decoding errors handler.
     On Python 2 this is just an alias for open(name, 'rt').
     """
-    if PY3:
-        # See:
-        # https://github.com/giampaolo/psutil/issues/675
-        # https://github.com/giampaolo/psutil/pull/733
-        kwargs.setdefault('encoding', ENCODING)
-        kwargs.setdefault('errors', ENCODING_ERRS)
-    return open(fname, "rt", **kwargs)
+    if not PY3:
+        return open(fname, buffering=FILE_READ_BUFFER_SIZE)
+
+    # See:
+    # https://github.com/giampaolo/psutil/issues/675
+    # https://github.com/giampaolo/psutil/pull/733
+    fobj = open(
+        fname,
+        buffering=FILE_READ_BUFFER_SIZE,
+        encoding=ENCODING,
+        errors=ENCODING_ERRS,
+    )
+    try:
+        # Dictates per-line read(2) buffer size. Defaults is 8k. See:
+        # https://github.com/giampaolo/psutil/issues/2050#issuecomment-1013387546
+        fobj._CHUNK_SIZE = FILE_READ_BUFFER_SIZE
+    except AttributeError:
+        pass
+    except Exception:
+        fobj.close()
+        raise
+
+    return fobj
+
+
+def cat(fname, fallback=_DEFAULT, _open=open_text):
+    """Read entire file content and return it as a string. File is
+    opened in text mode. If specified, `fallback` is the value
+    returned in case of error, either if the file does not exist or
+    it can't be read().
+    """
+    if fallback is _DEFAULT:
+        with _open(fname) as f:
+            return f.read()
+    else:
+        try:
+            with _open(fname) as f:
+                return f.read()
+        except (IOError, OSError):
+            return fallback
+
+
+def bcat(fname, fallback=_DEFAULT):
+    """Same as above but opens file in binary mode."""
+    return cat(fname, fallback=fallback, _open=open_binary)
 
 
 def bytes2human(n, format="%(value).1f%(symbol)s"):
-    """Used by various scripts. See:
-    http://goo.gl/zeJZl
+    """Used by various scripts. See: http://goo.gl/zeJZl.
 
     >>> bytes2human(10000)
     '9.8K'
@@ -739,7 +853,7 @@ def bytes2human(n, format="%(value).1f%(symbol)s"):
     for i, s in enumerate(symbols[1:]):
         prefix[s] = 1 << (i + 1) * 10
     for symbol in reversed(symbols[1:]):
-        if n >= prefix[symbol]:
+        if abs(n) >= prefix[symbol]:
             value = float(n) / prefix[symbol]
             return format % locals()
     return format % dict(symbol=symbols[0], value=n)
@@ -751,9 +865,12 @@ def get_procfs_path():
 
 
 if PY3:
+
     def decode(s):
         return s.decode(encoding=ENCODING, errors=ENCODING_ERRS)
+
 else:
+
     def decode(s):
         return s
 
@@ -769,10 +886,11 @@ def term_supports_colors(file=sys.stdout):  # pragma: no cover
         return True
     try:
         import curses
+
         assert file.isatty()
         curses.setupterm()
         assert curses.tigetnum("colors") > 0
-    except Exception:
+    except Exception:  # noqa: BLE001
         return False
     else:
         return True
@@ -783,14 +901,24 @@ def hilite(s, color=None, bold=False):  # pragma: no cover
     if not term_supports_colors():
         return s
     attr = []
-    colors = dict(green='32', red='91', brown='33', yellow='93', blue='34',
-                  violet='35', lightblue='36', grey='37', darkgrey='30')
+    colors = dict(
+        blue='34',
+        brown='33',
+        darkgrey='30',
+        green='32',
+        grey='37',
+        lightblue='36',
+        red='91',
+        violet='35',
+        yellow='93',
+    )
     colors[None] = '29'
     try:
         color = colors[color]
     except KeyError:
-        raise ValueError("invalid color %r; choose between %s" % (
-            list(colors.keys())))
+        raise ValueError(
+            "invalid color %r; choose between %s" % (list(colors.keys()))
+        )
     attr.append(color)
     if bold:
         attr.append('1')
@@ -798,7 +926,8 @@ def hilite(s, color=None, bold=False):  # pragma: no cover
 
 
 def print_color(
-        s, color=None, bold=False, file=sys.stdout):  # pragma: no cover
+    s, color=None, bold=False, file=sys.stdout
+):  # pragma: no cover
     """Print a colorized version of string."""
     if not term_supports_colors():
         print(s, file=file)  # NOQA
@@ -809,16 +938,19 @@ def print_color(
 
         DEFAULT_COLOR = 7
         GetStdHandle = ctypes.windll.Kernel32.GetStdHandle
-        SetConsoleTextAttribute = \
+        SetConsoleTextAttribute = (
             ctypes.windll.Kernel32.SetConsoleTextAttribute
+        )
 
         colors = dict(green=2, red=4, brown=6, yellow=6)
         colors[None] = DEFAULT_COLOR
         try:
             color = colors[color]
         except KeyError:
-            raise ValueError("invalid color %r; choose between %r" % (
-                color, list(colors.keys())))
+            raise ValueError(
+                "invalid color %r; choose between %r"
+                % (color, list(colors.keys()))
+            )
         if bold and color <= 7:
             color += 8
 
@@ -827,20 +959,25 @@ def print_color(
         handle = GetStdHandle(handle_id)
         SetConsoleTextAttribute(handle, color)
         try:
-            print(s, file=file)    # NOQA
+            print(s, file=file)  # NOQA
         finally:
             SetConsoleTextAttribute(handle, DEFAULT_COLOR)
 
 
-if bool(os.getenv('PSUTIL_DEBUG', 0)):
-    import inspect
+def debug(msg):
+    """If PSUTIL_DEBUG env var is set, print a debug message to stderr."""
+    if PSUTIL_DEBUG:
+        import inspect
 
-    def debug(msg):
-        """If PSUTIL_DEBUG env var is set, print a debug message to stderr."""
-        fname, lineno, func_name, lines, index = inspect.getframeinfo(
-            inspect.currentframe().f_back)
-        print("psutil-debug [%s:%s]> %s" % (fname, lineno, msg),  # NOQA
-              file=sys.stderr)
-else:
-    def debug(msg):
-        pass
+        fname, lineno, _, lines, index = inspect.getframeinfo(
+            inspect.currentframe().f_back
+        )
+        if isinstance(msg, Exception):
+            if isinstance(msg, (OSError, IOError, EnvironmentError)):
+                # ...because str(exc) may contain info about the file name
+                msg = "ignoring %s" % msg
+            else:
+                msg = "ignoring %r" % msg
+        print(  # noqa
+            "psutil-debug [%s:%s]> %s" % (fname, lineno, msg), file=sys.stderr
+        )
diff --git a/contrib/python/psutil/py3/psutil/_compat.py b/contrib/python/psutil/py3/psutil/_compat.py
index 17f38485e9..3db56c6019 100644
--- a/contrib/python/psutil/py3/psutil/_compat.py
+++ b/contrib/python/psutil/py3/psutil/_compat.py
@@ -8,12 +8,15 @@ Python 3 way of doing things).
 """
 
 import collections
+import contextlib
 import errno
 import functools
 import os
 import sys
 import types
 
+
+# fmt: off
 __all__ = [
     # constants
     "PY3",
@@ -25,12 +28,16 @@ __all__ = [
     "lru_cache",
     # shutil module
     "which", "get_terminal_size",
+    # contextlib module
+    "redirect_stderr",
     # python 3 exceptions
     "FileNotFoundError", "PermissionError", "ProcessLookupError",
-    "InterruptedError", "ChildProcessError", "FileExistsError"]
+    "InterruptedError", "ChildProcessError", "FileExistsError",
+]
+# fmt: on
 
 
-PY3 = sys.version_info[0] == 3
+PY3 = sys.version_info[0] >= 3
 _SENTINEL = object()
 
 if PY3:
@@ -45,6 +52,7 @@ if PY3:
 
     def b(s):
         return s.encode("latin-1")
+
 else:
     long = long
     range = xrange
@@ -79,7 +87,8 @@ else:
                 # Get the function's first positional argument.
                 type_or_obj = f.f_locals[f.f_code.co_varnames[0]]
             except (IndexError, KeyError):
-                raise RuntimeError('super() used in a function with no args')
+                msg = 'super() used in a function with no args'
+                raise RuntimeError(msg)
             try:
                 # Get the MRO so we can crawl it.
                 mro = type_or_obj.__mro__
@@ -87,7 +96,8 @@ else:
                 try:
                     mro = type_or_obj.__class__.__mro__
                 except AttributeError:
-                    raise RuntimeError('super() used in a non-newstyle class')
+                    msg = 'super() used in a non-newstyle class'
+                    raise RuntimeError(msg)
             for type_ in mro:
                 #  Find the class that owns the currently-executing method.
                 for meth in type_.__dict__.values():
@@ -114,7 +124,8 @@ else:
                     continue
                 break  # found
             else:
-                raise RuntimeError('super() called outside a method')
+                msg = 'super() called outside a method'
+                raise RuntimeError(msg)
 
         # Dispatch to builtin super().
         if type_or_obj is not _SENTINEL:
@@ -140,7 +151,6 @@ else:
     def _instance_checking_exception(base_exception=Exception):
         def wrapped(instance_checker):
             class TemporaryClass(base_exception):
-
                 def __init__(self, *args, **kwargs):
                     if len(args) == 1 and isinstance(args[0], TemporaryClass):
                         unwrap_me = args[0]
@@ -148,7 +158,9 @@ else:
                             if not attr.startswith('__'):
                                 setattr(self, attr, getattr(unwrap_me, attr))
                     else:
-                        super(TemporaryClass, self).__init__(*args, **kwargs)
+                        super(TemporaryClass, self).__init__(  # noqa
+                            *args, **kwargs
+                        )
 
                 class __metaclass__(type):
                     def __instancecheck__(cls, inst):
@@ -174,8 +186,7 @@ else:
 
     @_instance_checking_exception(EnvironmentError)
     def PermissionError(inst):
-        return getattr(inst, 'errno', _SENTINEL) in (
-            errno.EACCES, errno.EPERM)
+        return getattr(inst, 'errno', _SENTINEL) in (errno.EACCES, errno.EPERM)
 
     @_instance_checking_exception(EnvironmentError)
     def InterruptedError(inst):
@@ -195,9 +206,11 @@ else:
         except FileExistsError:
             pass
         except OSError:
-            raise RuntimeError(
+            msg = (
                 "broken or incompatible Python implementation, see: "
-                "https://github.com/giampaolo/psutil/issues/1659")
+                "https://github.com/giampaolo/psutil/issues/1659"
+            )
+            raise RuntimeError(msg)
 
 
 # --- stdlib additions
@@ -215,10 +228,11 @@ except ImportError:
         from dummy_threading import RLock
 
     _CacheInfo = collections.namedtuple(
-        "CacheInfo", ["hits", "misses", "maxsize", "currsize"])
+        "CacheInfo", ["hits", "misses", "maxsize", "currsize"]
+    )
 
     class _HashedSeq(list):
-        __slots__ = 'hashvalue'
+        __slots__ = ('hashvalue',)
 
         def __init__(self, tup, hash=hash):
             self[:] = tup
@@ -227,10 +241,17 @@ except ImportError:
         def __hash__(self):
             return self.hashvalue
 
-    def _make_key(args, kwds, typed,
-                  kwd_mark=(object(), ),
-                  fasttypes=set((int, str, frozenset, type(None))),
-                  sorted=sorted, tuple=tuple, type=type, len=len):
+    def _make_key(
+        args,
+        kwds,
+        typed,
+        kwd_mark=(_SENTINEL,),
+        fasttypes=set((int, str, frozenset, type(None))),  # noqa
+        sorted=sorted,
+        tuple=tuple,
+        type=type,
+        len=len,
+    ):
         key = args
         if kwds:
             sorted_items = sorted(kwds.items())
@@ -247,10 +268,11 @@ except ImportError:
 
     def lru_cache(maxsize=100, typed=False):
         """Least-recently-used cache decorator, see:
-        http://docs.python.org/3/library/functools.html#functools.lru_cache
+        http://docs.python.org/3/library/functools.html#functools.lru_cache.
         """
+
         def decorating_function(user_function):
-            cache = dict()
+            cache = {}
             stats = [0, 0]
             HITS, MISSES = 0, 1
             make_key = _make_key
@@ -262,11 +284,14 @@ except ImportError:
             nonlocal_root = [root]
             PREV, NEXT, KEY, RESULT = 0, 1, 2, 3
             if maxsize == 0:
+
                 def wrapper(*args, **kwds):
                     result = user_function(*args, **kwds)
                     stats[MISSES] += 1
                     return result
+
             elif maxsize is None:
+
                 def wrapper(*args, **kwds):
                     key = make_key(args, kwds, typed)
                     result = cache_get(key, root)
@@ -277,7 +302,9 @@ except ImportError:
                     cache[key] = result
                     stats[MISSES] += 1
                     return result
+
             else:
+
                 def wrapper(*args, **kwds):
                     if kwds or typed:
                         key = make_key(args, kwds, typed)
@@ -287,7 +314,7 @@ except ImportError:
                     try:
                         link = cache_get(key)
                         if link is not None:
-                            root, = nonlocal_root
+                            (root,) = nonlocal_root
                             link_prev, link_next, key, result = link
                             link_prev[NEXT] = link_next
                             link_next[PREV] = link_prev
@@ -302,7 +329,7 @@ except ImportError:
                     result = user_function(*args, **kwds)
                     lock.acquire()
                     try:
-                        root, = nonlocal_root
+                        (root,) = nonlocal_root
                         if key in cache:
                             pass
                         elif _len(cache) >= maxsize:
@@ -324,16 +351,17 @@ except ImportError:
                     return result
 
             def cache_info():
-                """Report cache statistics"""
+                """Report cache statistics."""
                 lock.acquire()
                 try:
-                    return _CacheInfo(stats[HITS], stats[MISSES], maxsize,
-                                      len(cache))
+                    return _CacheInfo(
+                        stats[HITS], stats[MISSES], maxsize, len(cache)
+                    )
                 finally:
                     lock.release()
 
             def cache_clear():
-                """Clear the cache and cache statistics"""
+                """Clear the cache and cache statistics."""
                 lock.acquire()
                 try:
                     cache.clear()
@@ -355,6 +383,7 @@ except ImportError:
 try:
     from shutil import which
 except ImportError:
+
     def which(cmd, mode=os.F_OK | os.X_OK, path=None):
         """Given a command, mode, and a PATH string, return the path which
         conforms to the given mode on the PATH, or None if there is no such
@@ -364,9 +393,13 @@ except ImportError:
         of os.environ.get("PATH"), or can be overridden with a custom search
         path.
         """
+
         def _access_check(fn, mode):
-            return (os.path.exists(fn) and os.access(fn, mode) and
-                    not os.path.isdir(fn))
+            return (
+                os.path.exists(fn)
+                and os.access(fn, mode)
+                and not os.path.isdir(fn)
+            )
 
         if os.path.dirname(cmd):
             if _access_check(cmd, mode):
@@ -407,18 +440,44 @@ except ImportError:
 try:
     from shutil import get_terminal_size
 except ImportError:
+
     def get_terminal_size(fallback=(80, 24)):
         try:
             import fcntl
-            import termios
             import struct
+            import termios
         except ImportError:
             return fallback
         else:
             try:
                 # This should work on Linux.
                 res = struct.unpack(
-                    'hh', fcntl.ioctl(1, termios.TIOCGWINSZ, '1234'))
+                    'hh', fcntl.ioctl(1, termios.TIOCGWINSZ, '1234')
+                )
                 return (res[1], res[0])
-            except Exception:
+            except Exception:  # noqa: BLE001
                 return fallback
+
+
+# python 3.3
+try:
+    from subprocess import TimeoutExpired as SubprocessTimeoutExpired
+except ImportError:
+
+    class SubprocessTimeoutExpired(Exception):
+        pass
+
+
+# python 3.5
+try:
+    from contextlib import redirect_stderr
+except ImportError:
+
+    @contextlib.contextmanager
+    def redirect_stderr(new_target):
+        original = sys.stderr
+        try:
+            sys.stderr = new_target
+            yield new_target
+        finally:
+            sys.stderr = original
diff --git a/contrib/python/psutil/py3/psutil/_psaix.py b/contrib/python/psutil/py3/psutil/_psaix.py
index 7160ecd63a..7310ab6c3d 100644
--- a/contrib/python/psutil/py3/psutil/_psaix.py
+++ b/contrib/python/psutil/py3/psutil/_psaix.py
@@ -18,20 +18,20 @@ from . import _common
 from . import _psposix
 from . import _psutil_aix as cext
 from . import _psutil_posix as cext_posix
-from ._common import AccessDenied
-from ._common import conn_to_ntuple
-from ._common import get_procfs_path
-from ._common import memoize_when_activated
 from ._common import NIC_DUPLEX_FULL
 from ._common import NIC_DUPLEX_HALF
 from ._common import NIC_DUPLEX_UNKNOWN
+from ._common import AccessDenied
 from ._common import NoSuchProcess
-from ._common import usage_percent
 from ._common import ZombieProcess
+from ._common import conn_to_ntuple
+from ._common import get_procfs_path
+from ._common import memoize_when_activated
+from ._common import usage_percent
+from ._compat import PY3
 from ._compat import FileNotFoundError
 from ._compat import PermissionError
 from ._compat import ProcessLookupError
-from ._compat import PY3
 
 
 __extra__all__ = ["PROCFS_PATH"]
@@ -53,7 +53,7 @@ PROC_STATUSES = {
     cext.SIDL: _common.STATUS_IDLE,
     cext.SZOMB: _common.STATUS_ZOMBIE,
     cext.SACTIVE: _common.STATUS_RUNNING,
-    cext.SSWAP: _common.STATUS_RUNNING,      # TODO what status is this?
+    cext.SSWAP: _common.STATUS_RUNNING,  # TODO what status is this?
     cext.SSTOP: _common.STATUS_STOPPED,
 }
 
@@ -80,7 +80,8 @@ proc_info_map = dict(
     nice=4,
     num_threads=5,
     status=6,
-    ttynr=7)
+    ttynr=7,
+)
 
 
 # =====================================================================
@@ -123,13 +124,13 @@ def swap_memory():
 
 
 def cpu_times():
-    """Return system-wide CPU times as a named tuple"""
+    """Return system-wide CPU times as a named tuple."""
     ret = cext.per_cpu_times()
     return scputimes(*[sum(x) for x in zip(*ret)])
 
 
 def per_cpu_times():
-    """Return system per-CPU times as a list of named tuples"""
+    """Return system per-CPU times as a list of named tuples."""
     ret = cext.per_cpu_times()
     return [scputimes(*x) for x in ret]
 
@@ -143,14 +144,14 @@ def cpu_count_logical():
         return None
 
 
-def cpu_count_physical():
-    cmd = "lsdev -Cc processor"
-    p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,
-                         stderr=subprocess.PIPE)
+def cpu_count_cores():
+    cmd = ["lsdev", "-Cc", "processor"]
+    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     stdout, stderr = p.communicate()
     if PY3:
-        stdout, stderr = [x.decode(sys.stdout.encoding)
-                          for x in (stdout, stderr)]
+        stdout, stderr = (
+            x.decode(sys.stdout.encoding) for x in (stdout, stderr)
+        )
     if p.returncode != 0:
         raise RuntimeError("%r command error\n%s" % (cmd, stderr))
     processors = stdout.strip().splitlines()
@@ -161,7 +162,8 @@ def cpu_stats():
     """Return various CPU stats as a named tuple."""
     ctx_switches, interrupts, soft_interrupts, syscalls = cext.cpu_stats()
     return _common.scpustats(
-        ctx_switches, interrupts, soft_interrupts, syscalls)
+        ctx_switches, interrupts, soft_interrupts, syscalls
+    )
 
 
 # =====================================================================
@@ -190,8 +192,9 @@ def disk_partitions(all=False):
             if not disk_usage(mountpoint).total:
                 continue
         maxfile = maxpath = None  # set later
-        ntuple = _common.sdiskpart(device, mountpoint, fstype, opts,
-                                   maxfile, maxpath)
+        ntuple = _common.sdiskpart(
+            device, mountpoint, fstype, opts, maxfile, maxpath
+        )
         retlist.append(ntuple)
     return retlist
 
@@ -213,8 +216,10 @@ def net_connections(kind, _pid=-1):
     """
     cmap = _common.conn_tmap
     if kind not in cmap:
-        raise ValueError("invalid %r kind argument; choose between %s"
-                         % (kind, ', '.join([repr(x) for x in cmap])))
+        raise ValueError(
+            "invalid %r kind argument; choose between %s"
+            % (kind, ', '.join([repr(x) for x in cmap]))
+        )
     families, types = _common.conn_tmap[kind]
     rawlist = cext.net_connections(_pid)
     ret = []
@@ -224,41 +229,56 @@ def net_connections(kind, _pid=-1):
             continue
         if type_ not in types:
             continue
-        nt = conn_to_ntuple(fd, fam, type_, laddr, raddr, status,
-                            TCP_STATUSES, pid=pid if _pid == -1 else None)
+        nt = conn_to_ntuple(
+            fd,
+            fam,
+            type_,
+            laddr,
+            raddr,
+            status,
+            TCP_STATUSES,
+            pid=pid if _pid == -1 else None,
+        )
         ret.append(nt)
     return ret
 
 
 def net_if_stats():
     """Get NIC stats (isup, duplex, speed, mtu)."""
-    duplex_map = {"Full": NIC_DUPLEX_FULL,
-                  "Half": NIC_DUPLEX_HALF}
+    duplex_map = {"Full": NIC_DUPLEX_FULL, "Half": NIC_DUPLEX_HALF}
     names = set([x[0] for x in net_if_addrs()])
     ret = {}
     for name in names:
-        isup, mtu = cext.net_if_stats(name)
+        mtu = cext_posix.net_if_mtu(name)
+        flags = cext_posix.net_if_flags(name)
 
         # try to get speed and duplex
         # TODO: rewrite this in C (entstat forks, so use truss -f to follow.
         # looks like it is using an undocumented ioctl?)
         duplex = ""
         speed = 0
-        p = subprocess.Popen(["/usr/bin/entstat", "-d", name],
-                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        p = subprocess.Popen(
+            ["/usr/bin/entstat", "-d", name],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+        )
         stdout, stderr = p.communicate()
         if PY3:
-            stdout, stderr = [x.decode(sys.stdout.encoding)
-                              for x in (stdout, stderr)]
+            stdout, stderr = (
+                x.decode(sys.stdout.encoding) for x in (stdout, stderr)
+            )
         if p.returncode == 0:
             re_result = re.search(
-                r"Running: (\d+) Mbps.*?(\w+) Duplex", stdout)
+                r"Running: (\d+) Mbps.*?(\w+) Duplex", stdout
+            )
             if re_result is not None:
                 speed = int(re_result.group(1))
                 duplex = re_result.group(2)
 
+        output_flags = ','.join(flags)
+        isup = 'running' in flags
         duplex = duplex_map.get(duplex, NIC_DUPLEX_UNKNOWN)
-        ret[name] = _common.snicstats(isup, duplex, speed, mtu)
+        ret[name] = _common.snicstats(isup, duplex, speed, mtu, output_flags)
     return ret
 
 
@@ -310,6 +330,7 @@ def wrap_exceptions(fun):
     """Call callable into a try/except clause and translate ENOENT,
     EACCES and EPERM in NoSuchProcess or AccessDenied exceptions.
     """
+
     @functools.wraps(fun)
     def wrapper(self, *args, **kwargs):
         try:
@@ -324,10 +345,11 @@ def wrap_exceptions(fun):
                 raise ZombieProcess(self.pid, self._name, self._ppid)
         except PermissionError:
             raise AccessDenied(self.pid, self._name)
+
     return wrapper
 
 
-class Process(object):
+class Process:
     """Wrapper class around underlying C implementation."""
 
     __slots__ = ["pid", "_name", "_ppid", "_procfs_path", "_cache"]
@@ -376,17 +398,20 @@ class Process(object):
             if not os.path.isabs(exe):
                 # if cwd has changed, we're out of luck - this may be wrong!
                 exe = os.path.abspath(os.path.join(self.cwd(), exe))
-            if (os.path.isabs(exe) and
-                    os.path.isfile(exe) and
-                    os.access(exe, os.X_OK)):
+            if (
+                os.path.isabs(exe)
+                and os.path.isfile(exe)
+                and os.access(exe, os.X_OK)
+            ):
                 return exe
             # not found, move to search in PATH using basename only
             exe = os.path.basename(exe)
         # search for exe name PATH
         for path in os.environ["PATH"].split(":"):
             possible_exe = os.path.abspath(os.path.join(path, exe))
-            if (os.path.isfile(possible_exe) and
-                    os.access(possible_exe, os.X_OK)):
+            if os.path.isfile(possible_exe) and os.access(
+                possible_exe, os.X_OK
+            ):
                 return possible_exe
         return ''
 
@@ -407,6 +432,7 @@ class Process(object):
         return self._proc_basic_info()[proc_info_map['num_threads']]
 
     if HAS_THREADS:
+
         @wrap_exceptions
         def threads(self):
             rawlist = cext.proc_threads(self.pid)
@@ -462,14 +488,14 @@ class Process(object):
 
     @wrap_exceptions
     def cpu_times(self):
-        cpu_times = cext.proc_cpu_times(self.pid, self._procfs_path)
-        return _common.pcputimes(*cpu_times)
+        t = cext.proc_cpu_times(self.pid, self._procfs_path)
+        return _common.pcputimes(*t)
 
     @wrap_exceptions
     def terminal(self):
         ttydev = self._proc_basic_info()[proc_info_map['ttynr']]
         # convert from 64-bit dev_t to 32-bit dev_t and then map the device
-        ttydev = (((ttydev & 0x0000FFFF00000000) >> 16) | (ttydev & 0xFFFF))
+        ttydev = ((ttydev & 0x0000FFFF00000000) >> 16) | (ttydev & 0xFFFF)
         # try to match rdev of /dev/pts/* files ttydev
         for dev in glob.glob("/dev/**/*"):
             if os.stat(dev).st_rdev == ttydev:
@@ -484,7 +510,7 @@ class Process(object):
             return result.rstrip('/')
         except FileNotFoundError:
             os.stat("%s/%s" % (procfs_path, self.pid))  # raise NSP or AD
-            return None
+            return ""
 
     @wrap_exceptions
     def memory_info(self):
@@ -504,12 +530,16 @@ class Process(object):
     def open_files(self):
         # TODO rewrite without using procfiles (stat /proc/pid/fd/* and then
         # find matching name of the inode)
-        p = subprocess.Popen(["/usr/bin/procfiles", "-n", str(self.pid)],
-                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        p = subprocess.Popen(
+            ["/usr/bin/procfiles", "-n", str(self.pid)],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+        )
         stdout, stderr = p.communicate()
         if PY3:
-            stdout, stderr = [x.decode(sys.stdout.encoding)
-                              for x in (stdout, stderr)]
+            stdout, stderr = (
+                x.decode(sys.stdout.encoding) for x in (stdout, stderr)
+            )
         if "no such process" in stderr.lower():
             raise NoSuchProcess(self.pid, self._name)
         procfiles = re.findall(r"(\d+): S_IFREG.*\s*.*name:(.*)\n", stdout)
@@ -525,20 +555,20 @@ class Process(object):
 
     @wrap_exceptions
     def num_fds(self):
-        if self.pid == 0:       # no /proc/0/fd
+        if self.pid == 0:  # no /proc/0/fd
             return 0
         return len(os.listdir("%s/%s/fd" % (self._procfs_path, self.pid)))
 
     @wrap_exceptions
     def num_ctx_switches(self):
-        return _common.pctxsw(
-            *cext.proc_num_ctx_switches(self.pid))
+        return _common.pctxsw(*cext.proc_num_ctx_switches(self.pid))
 
     @wrap_exceptions
     def wait(self, timeout=None):
         return _psposix.wait_pid(self.pid, timeout, self._name)
 
     if HAS_PROC_IO_COUNTERS:
+
         @wrap_exceptions
         def io_counters(self):
             try:
diff --git a/contrib/python/psutil/py3/psutil/_psbsd.py b/contrib/python/psutil/py3/psutil/_psbsd.py
index 764463e980..da68f5efd5 100644
--- a/contrib/python/psutil/py3/psutil/_psbsd.py
+++ b/contrib/python/psutil/py3/psutil/_psbsd.py
@@ -8,25 +8,26 @@ import contextlib
 import errno
 import functools
 import os
-import xml.etree.ElementTree as ET
-from collections import namedtuple
 from collections import defaultdict
+from collections import namedtuple
+from xml.etree import ElementTree
 
 from . import _common
 from . import _psposix
 from . import _psutil_bsd as cext
 from . import _psutil_posix as cext_posix
+from ._common import FREEBSD
+from ._common import NETBSD
+from ._common import OPENBSD
 from ._common import AccessDenied
+from ._common import NoSuchProcess
+from ._common import ZombieProcess
 from ._common import conn_tmap
 from ._common import conn_to_ntuple
-from ._common import FREEBSD
+from ._common import debug
 from ._common import memoize
 from ._common import memoize_when_activated
-from ._common import NETBSD
-from ._common import NoSuchProcess
-from ._common import OPENBSD
 from ._common import usage_percent
-from ._common import ZombieProcess
 from ._compat import FileNotFoundError
 from ._compat import PermissionError
 from ._compat import ProcessLookupError
@@ -140,6 +141,7 @@ kinfo_proc_map = dict(
 # =====================================================================
 
 
+# fmt: off
 # psutil.virtual_memory()
 svmem = namedtuple(
     'svmem', ['total', 'available', 'percent', 'used', 'free',
@@ -169,6 +171,7 @@ if FREEBSD:
 else:
     sdiskio = namedtuple('sdiskio', ['read_count', 'write_count',
                                      'read_bytes', 'write_bytes'])
+# fmt: on
 
 
 # =====================================================================
@@ -177,10 +180,9 @@ else:
 
 
 def virtual_memory():
-    """System virtual memory as a namedtuple."""
     mem = cext.virtual_mem()
-    total, free, active, inactive, wired, cached, buffers, shared = mem
     if NETBSD:
+        total, free, active, inactive, wired, cached = mem
         # On NetBSD buffers and shared mem is determined via /proc.
         # The C ext set them to 0.
         with open('/proc/meminfo', 'rb') as f:
@@ -189,11 +191,39 @@ def virtual_memory():
                     buffers = int(line.split()[1]) * 1024
                 elif line.startswith(b'MemShared:'):
                     shared = int(line.split()[1]) * 1024
-    avail = inactive + cached + free
-    used = active + wired + cached
+        # Before avail was calculated as (inactive + cached + free),
+        # same as zabbix, but it turned out it could exceed total (see
+        # #2233), so zabbix seems to be wrong. Htop calculates it
+        # differently, and the used value seem more realistic, so let's
+        # match htop.
+        # https://github.com/htop-dev/htop/blob/e7f447b/netbsd/NetBSDProcessList.c#L162  # noqa
+        # https://github.com/zabbix/zabbix/blob/af5e0f8/src/libs/zbxsysinfo/netbsd/memory.c#L135  # noqa
+        used = active + wired
+        avail = total - used
+    else:
+        total, free, active, inactive, wired, cached, buffers, shared = mem
+        # matches freebsd-memory CLI:
+        # * https://people.freebsd.org/~rse/dist/freebsd-memory
+        # * https://www.cyberciti.biz/files/scripts/freebsd-memory.pl.txt
+        # matches zabbix:
+        # * https://github.com/zabbix/zabbix/blob/af5e0f8/src/libs/zbxsysinfo/freebsd/memory.c#L143  # noqa
+        avail = inactive + cached + free
+        used = active + wired + cached
+
     percent = usage_percent((total - avail), total, round_=1)
-    return svmem(total, avail, percent, used, free,
-                 active, inactive, buffers, cached, shared, wired)
+    return svmem(
+        total,
+        avail,
+        percent,
+        used,
+        free,
+        active,
+        inactive,
+        buffers,
+        cached,
+        shared,
+        wired,
+    )
 
 
 def swap_memory():
@@ -209,20 +239,22 @@ def swap_memory():
 
 
 def cpu_times():
-    """Return system per-CPU times as a namedtuple"""
+    """Return system per-CPU times as a namedtuple."""
     user, nice, system, idle, irq = cext.cpu_times()
     return scputimes(user, nice, system, idle, irq)
 
 
 if HAS_PER_CPU_TIMES:
+
     def per_cpu_times():
-        """Return system CPU times as a namedtuple"""
+        """Return system CPU times as a namedtuple."""
         ret = []
         for cpu_t in cext.per_cpu_times():
             user, nice, system, idle, irq = cpu_t
             item = scputimes(user, nice, system, idle, irq)
             ret.append(item)
         return ret
+
 else:
     # XXX
     # Ok, this is very dirty.
@@ -232,11 +264,12 @@ else:
     # crash at psutil import time.
     # Next calls will fail with NotImplementedError
     def per_cpu_times():
-        """Return system CPU times as a namedtuple"""
+        """Return system CPU times as a namedtuple."""
         if cpu_count_logical() == 1:
             return [cpu_times()]
         if per_cpu_times.__called__:
-            raise NotImplementedError("supported only starting from FreeBSD 8")
+            msg = "supported only starting from FreeBSD 8"
+            raise NotImplementedError(msg)
         per_cpu_times.__called__ = True
         return [cpu_times()]
 
@@ -249,33 +282,35 @@ def cpu_count_logical():
 
 
 if OPENBSD or NETBSD:
-    def cpu_count_physical():
+
+    def cpu_count_cores():
         # OpenBSD and NetBSD do not implement this.
         return 1 if cpu_count_logical() == 1 else None
+
 else:
-    def cpu_count_physical():
-        """Return the number of physical CPUs in the system."""
+
+    def cpu_count_cores():
+        """Return the number of CPU cores in the system."""
         # From the C module we'll get an XML string similar to this:
         # http://manpages.ubuntu.com/manpages/precise/man4/smp.4freebsd.html
         # We may get None in case "sysctl kern.sched.topology_spec"
         # is not supported on this BSD version, in which case we'll mimic
         # os.cpu_count() and return None.
         ret = None
-        s = cext.cpu_count_phys()
+        s = cext.cpu_topology()
         if s is not None:
             # get rid of padding chars appended at the end of the string
             index = s.rfind("</groups>")
             if index != -1:
-                s = s[:index + 9]
-                root = ET.fromstring(s)
+                s = s[: index + 9]
+                root = ElementTree.fromstring(s)
                 try:
                     ret = len(root.findall('group/children/group/cpu')) or None
                 finally:
                     # needed otherwise it will memleak
                     root.clear()
         if not ret:
-            # If logical CPUs are 1 it's obvious we'll have only 1
-            # physical CPU.
+            # If logical CPUs == 1 it's obvious we' have only 1 core.
             if cpu_count_logical() == 1:
                 return 1
         return ret
@@ -297,8 +332,9 @@ def cpu_stats():
         #
         # Note: the C ext is returning some metrics we are not exposing:
         # traps, faults and forks.
-        ctxsw, intrs, soft_intrs, syscalls, traps, faults, forks = \
+        ctxsw, intrs, soft_intrs, syscalls, traps, faults, forks = (
             cext.cpu_stats()
+        )
         with open('/proc/stat', 'rb') as f:
             for line in f:
                 if line.startswith(b'intr'):
@@ -306,11 +342,45 @@ def cpu_stats():
     elif OPENBSD:
         # Note: the C ext is returning some metrics we are not exposing:
         # traps, faults and forks.
-        ctxsw, intrs, soft_intrs, syscalls, traps, faults, forks = \
+        ctxsw, intrs, soft_intrs, syscalls, traps, faults, forks = (
             cext.cpu_stats()
+        )
     return _common.scpustats(ctxsw, intrs, soft_intrs, syscalls)
 
 
+if FREEBSD:
+
+    def cpu_freq():
+        """Return frequency metrics for CPUs. As of Dec 2018 only
+        CPU 0 appears to be supported by FreeBSD and all other cores
+        match the frequency of CPU 0.
+        """
+        ret = []
+        num_cpus = cpu_count_logical()
+        for cpu in range(num_cpus):
+            try:
+                current, available_freq = cext.cpu_freq(cpu)
+            except NotImplementedError:
+                continue
+            if available_freq:
+                try:
+                    min_freq = int(available_freq.split(" ")[-1].split("/")[0])
+                except (IndexError, ValueError):
+                    min_freq = None
+                try:
+                    max_freq = int(available_freq.split(" ")[0].split("/")[0])
+                except (IndexError, ValueError):
+                    max_freq = None
+            ret.append(_common.scpufreq(current, min_freq, max_freq))
+        return ret
+
+elif OPENBSD:
+
+    def cpu_freq():
+        curr = float(cext.cpu_freq())
+        return [_common.scpufreq(curr, 0.0, 0.0)]
+
+
 # =====================================================================
 # --- disks
 # =====================================================================
@@ -319,15 +389,16 @@ def cpu_stats():
 def disk_partitions(all=False):
     """Return mounted disk partitions as a list of namedtuples.
     'all' argument is ignored, see:
-    https://github.com/giampaolo/psutil/issues/906
+    https://github.com/giampaolo/psutil/issues/906.
     """
     retlist = []
     partitions = cext.disk_partitions()
     for partition in partitions:
         device, mountpoint, fstype, opts = partition
         maxfile = maxpath = None  # set later
-        ntuple = _common.sdiskpart(device, mountpoint, fstype, opts,
-                                   maxfile, maxpath)
+        ntuple = _common.sdiskpart(
+            device, mountpoint, fstype, opts, maxfile, maxpath
+        )
         retlist.append(ntuple)
     return retlist
 
@@ -352,7 +423,7 @@ def net_if_stats():
     for name in names:
         try:
             mtu = cext_posix.net_if_mtu(name)
-            isup = cext_posix.net_if_is_running(name)
+            flags = cext_posix.net_if_flags(name)
             duplex, speed = cext_posix.net_if_duplex_speed(name)
         except OSError as err:
             # https://github.com/giampaolo/psutil/issues/1279
@@ -361,42 +432,37 @@ def net_if_stats():
         else:
             if hasattr(_common, 'NicDuplex'):
                 duplex = _common.NicDuplex(duplex)
-            ret[name] = _common.snicstats(isup, duplex, speed, mtu)
+            output_flags = ','.join(flags)
+            isup = 'running' in flags
+            ret[name] = _common.snicstats(
+                isup, duplex, speed, mtu, output_flags
+            )
     return ret
 
 
 def net_connections(kind):
     """System-wide network connections."""
-    if OPENBSD:
-        ret = []
-        for pid in pids():
-            try:
-                cons = Process(pid).connections(kind)
-            except (NoSuchProcess, ZombieProcess):
-                continue
-            else:
-                for conn in cons:
-                    conn = list(conn)
-                    conn.append(pid)
-                    ret.append(_common.sconn(*conn))
-        return ret
-
     if kind not in _common.conn_tmap:
-        raise ValueError("invalid %r kind argument; choose between %s"
-                         % (kind, ', '.join([repr(x) for x in conn_tmap])))
+        raise ValueError(
+            "invalid %r kind argument; choose between %s"
+            % (kind, ', '.join([repr(x) for x in conn_tmap]))
+        )
     families, types = conn_tmap[kind]
     ret = set()
-    if NETBSD:
-        rawlist = cext.net_connections(-1)
-    else:
-        rawlist = cext.net_connections()
+
+    if OPENBSD:
+        rawlist = cext.net_connections(-1, families, types)
+    elif NETBSD:
+        rawlist = cext.net_connections(-1, kind)
+    else:  # FreeBSD
+        rawlist = cext.net_connections(families, types)
+
     for item in rawlist:
         fd, fam, type, laddr, raddr, status, pid = item
-        # TODO: apply filter at C level
-        if fam in families and type in types:
-            nt = conn_to_ntuple(fd, fam, type, laddr, raddr, status,
-                                TCP_STATUSES, pid)
-            ret.add(nt)
+        nt = conn_to_ntuple(
+            fd, fam, type, laddr, raddr, status, TCP_STATUSES, pid
+        )
+        ret.add(nt)
     return list(ret)
 
 
@@ -424,7 +490,7 @@ if FREEBSD:
         return _common.sbattery(percent, secsleft, power_plugged)
 
     def sensors_temperatures():
-        "Return CPU cores temperatures if available, else an empty dict."
+        """Return CPU cores temperatures if available, else an empty dict."""
         ret = defaultdict(list)
         num_cpus = cpu_count_logical()
         for cpu in range(num_cpus):
@@ -434,36 +500,13 @@ if FREEBSD:
                     high = None
                 name = "Core %s" % cpu
                 ret["coretemp"].append(
-                    _common.shwtemp(name, current, high, high))
+                    _common.shwtemp(name, current, high, high)
+                )
             except NotImplementedError:
                 pass
 
         return ret
 
-    def cpu_freq():
-        """Return frequency metrics for CPUs. As of Dec 2018 only
-        CPU 0 appears to be supported by FreeBSD and all other cores
-        match the frequency of CPU 0.
-        """
-        ret = []
-        num_cpus = cpu_count_logical()
-        for cpu in range(num_cpus):
-            try:
-                current, available_freq = cext.cpu_frequency(cpu)
-            except NotImplementedError:
-                continue
-            if available_freq:
-                try:
-                    min_freq = int(available_freq.split(" ")[-1].split("/")[0])
-                except(IndexError, ValueError):
-                    min_freq = None
-                try:
-                    max_freq = int(available_freq.split(" ")[0].split("/")[0])
-                except(IndexError, ValueError):
-                    max_freq = None
-            ret.append(_common.scpufreq(current, min_freq, max_freq))
-        return ret
-
 
 # =====================================================================
 #  --- other system functions
@@ -519,6 +562,7 @@ def pids():
 
 
 if OPENBSD or NETBSD:
+
     def pid_exists(pid):
         """Return True if pid exists."""
         exists = _psposix.pid_exists(pid)
@@ -528,6 +572,7 @@ if OPENBSD or NETBSD:
             return pid in pids()
         else:
             return True
+
 else:
     pid_exists = _psposix.pid_exists
 
@@ -535,8 +580,8 @@ else:
 def is_zombie(pid):
     try:
         st = cext.proc_oneshot_info(pid)[kinfo_proc_map['status']]
-        return st == cext.SZOMB
-    except Exception:
+        return PROC_STATUSES.get(st) == _common.STATUS_ZOMBIE
+    except OSError:
         return False
 
 
@@ -544,6 +589,7 @@ def wrap_exceptions(fun):
     """Decorator which translates bare OSError exceptions into
     NoSuchProcess and AccessDenied.
     """
+
     @functools.wraps(fun)
     def wrapper(self, *args, **kwargs):
         try:
@@ -562,6 +608,7 @@ def wrap_exceptions(fun):
                 else:
                     raise
             raise
+
     return wrapper
 
 
@@ -582,7 +629,7 @@ def wrap_exceptions_procfs(inst):
         raise AccessDenied(inst.pid, inst._name)
 
 
-class Process(object):
+class Process:
     """Wrapper class around underlying C implementation."""
 
     __slots__ = ["pid", "_name", "_ppid", "_cache"]
@@ -646,10 +693,10 @@ class Process(object):
         if OPENBSD and self.pid == 0:
             return []  # ...else it crashes
         elif NETBSD:
-            # XXX - most of the times the underlying sysctl() call on Net
-            # and Open BSD returns a truncated string.
-            # Also /proc/pid/cmdline behaves the same so it looks
-            # like this is a kernel bug.
+            # XXX - most of the times the underlying sysctl() call on
+            # NetBSD and OpenBSD returns a truncated string. Also
+            # /proc/pid/cmdline behaves the same so it looks like this
+            # is a kernel bug.
             try:
                 return cext.proc_cmdline(self.pid)
             except OSError as err:
@@ -661,6 +708,7 @@ class Process(object):
                     else:
                         # XXX: this happens with unicode tests. It means the C
                         # routine is unable to decode invalid unicode chars.
+                        debug("ignoring %r and returning an empty list" % err)
                         return []
                 else:
                     raise
@@ -691,7 +739,8 @@ class Process(object):
         return _common.puids(
             rawtuple[kinfo_proc_map['real_uid']],
             rawtuple[kinfo_proc_map['effective_uid']],
-            rawtuple[kinfo_proc_map['saved_uid']])
+            rawtuple[kinfo_proc_map['saved_uid']],
+        )
 
     @wrap_exceptions
     def gids(self):
@@ -699,7 +748,8 @@ class Process(object):
         return _common.pgids(
             rawtuple[kinfo_proc_map['real_gid']],
             rawtuple[kinfo_proc_map['effective_gid']],
-            rawtuple[kinfo_proc_map['saved_gid']])
+            rawtuple[kinfo_proc_map['saved_gid']],
+        )
 
     @wrap_exceptions
     def cpu_times(self):
@@ -708,9 +758,11 @@ class Process(object):
             rawtuple[kinfo_proc_map['user_time']],
             rawtuple[kinfo_proc_map['sys_time']],
             rawtuple[kinfo_proc_map['ch_user_time']],
-            rawtuple[kinfo_proc_map['ch_sys_time']])
+            rawtuple[kinfo_proc_map['ch_sys_time']],
+        )
 
     if FREEBSD:
+
         @wrap_exceptions
         def cpu_num(self):
             return self.oneshot()[kinfo_proc_map['cpunum']]
@@ -723,7 +775,8 @@ class Process(object):
             rawtuple[kinfo_proc_map['vms']],
             rawtuple[kinfo_proc_map['memtext']],
             rawtuple[kinfo_proc_map['memdata']],
-            rawtuple[kinfo_proc_map['memstack']])
+            rawtuple[kinfo_proc_map['memstack']],
+        )
 
     memory_full_info = memory_info
 
@@ -744,7 +797,8 @@ class Process(object):
         rawtuple = self.oneshot()
         return _common.pctxsw(
             rawtuple[kinfo_proc_map['ctx_switches_vol']],
-            rawtuple[kinfo_proc_map['ctx_switches_unvol']])
+            rawtuple[kinfo_proc_map['ctx_switches_unvol']],
+        )
 
     @wrap_exceptions
     def threads(self):
@@ -761,35 +815,31 @@ class Process(object):
     @wrap_exceptions
     def connections(self, kind='inet'):
         if kind not in conn_tmap:
-            raise ValueError("invalid %r kind argument; choose between %s"
-                             % (kind, ', '.join([repr(x) for x in conn_tmap])))
+            raise ValueError(
+                "invalid %r kind argument; choose between %s"
+                % (kind, ', '.join([repr(x) for x in conn_tmap]))
+            )
+        families, types = conn_tmap[kind]
+        ret = []
 
         if NETBSD:
-            families, types = conn_tmap[kind]
-            ret = []
-            rawlist = cext.net_connections(self.pid)
-            for item in rawlist:
-                fd, fam, type, laddr, raddr, status, pid = item
-                assert pid == self.pid
-                if fam in families and type in types:
-                    nt = conn_to_ntuple(fd, fam, type, laddr, raddr, status,
-                                        TCP_STATUSES)
-                    ret.append(nt)
-            self._assert_alive()
-            return list(ret)
+            rawlist = cext.net_connections(self.pid, kind)
+        elif OPENBSD:
+            rawlist = cext.net_connections(self.pid, families, types)
+        else:
+            rawlist = cext.proc_connections(self.pid, families, types)
 
-        families, types = conn_tmap[kind]
-        rawlist = cext.proc_connections(self.pid, families, types)
-        ret = []
         for item in rawlist:
-            fd, fam, type, laddr, raddr, status = item
-            nt = conn_to_ntuple(fd, fam, type, laddr, raddr, status,
-                                TCP_STATUSES)
+            fd, fam, type, laddr, raddr, status = item[:6]
+            if FREEBSD:
+                if (fam not in families) or (type not in types):
+                    continue
+            nt = conn_to_ntuple(
+                fd, fam, type, laddr, raddr, status, TCP_STATUSES
+            )
             ret.append(nt)
 
-        if OPENBSD:
-            self._assert_alive()
-
+        self._assert_alive()
         return ret
 
     @wrap_exceptions
@@ -817,7 +867,8 @@ class Process(object):
             rawtuple[kinfo_proc_map['read_io_count']],
             rawtuple[kinfo_proc_map['write_io_count']],
             -1,
-            -1)
+            -1,
+        )
 
     @wrap_exceptions
     def cwd(self):
@@ -825,20 +876,22 @@ class Process(object):
         # sometimes we get an empty string, in which case we turn
         # it into None
         if OPENBSD and self.pid == 0:
-            return None  # ...else it would raise EINVAL
+            return ""  # ...else it would raise EINVAL
         elif NETBSD or HAS_PROC_OPEN_FILES:
             # FreeBSD < 8 does not support functions based on
             # kinfo_getfile() and kinfo_getvmmap()
-            return cext.proc_cwd(self.pid) or None
+            return cext.proc_cwd(self.pid)
         else:
             raise NotImplementedError(
-                "supported only starting from FreeBSD 8" if
-                FREEBSD else "")
+                "supported only starting from FreeBSD 8" if FREEBSD else ""
+            )
 
     nt_mmap_grouped = namedtuple(
-        'mmap', 'path rss, private, ref_count, shadow_count')
+        'mmap', 'path rss, private, ref_count, shadow_count'
+    )
     nt_mmap_ext = namedtuple(
-        'mmap', 'addr, perms path rss, private, ref_count, shadow_count')
+        'mmap', 'addr, perms path rss, private, ref_count, shadow_count'
+    )
 
     def _not_implemented(self):
         raise NotImplementedError
@@ -846,17 +899,20 @@ class Process(object):
     # FreeBSD < 8 does not support functions based on kinfo_getfile()
     # and kinfo_getvmmap()
     if HAS_PROC_OPEN_FILES:
+
         @wrap_exceptions
         def open_files(self):
             """Return files opened by process as a list of namedtuples."""
             rawlist = cext.proc_open_files(self.pid)
             return [_common.popenfile(path, fd) for path, fd in rawlist]
+
     else:
         open_files = _not_implemented
 
     # FreeBSD < 8 does not support functions based on kinfo_getfile()
     # and kinfo_getvmmap()
     if HAS_PROC_NUM_FDS:
+
         @wrap_exceptions
         def num_fds(self):
             """Return the number of file descriptors opened by this process."""
@@ -864,6 +920,7 @@ class Process(object):
             if NETBSD:
                 self._assert_alive()
             return ret
+
     else:
         num_fds = _not_implemented
 
@@ -883,8 +940,9 @@ class Process(object):
             allcpus = tuple(range(len(per_cpu_times())))
             for cpu in cpus:
                 if cpu not in allcpus:
-                    raise ValueError("invalid CPU #%i (choose between %s)"
-                                     % (cpu, allcpus))
+                    raise ValueError(
+                        "invalid CPU #%i (choose between %s)" % (cpu, allcpus)
+                    )
             try:
                 cext.proc_cpu_affinity_set(self.pid, cpus)
             except OSError as err:
@@ -896,8 +954,9 @@ class Process(object):
                     for cpu in cpus:
                         if cpu not in allcpus:
                             raise ValueError(
-                                "invalid CPU #%i (choose between %s)" % (
-                                    cpu, allcpus))
+                                "invalid CPU #%i (choose between %s)"
+                                % (cpu, allcpus)
+                            )
                 raise
 
         @wrap_exceptions
@@ -911,7 +970,8 @@ class Process(object):
             else:
                 if len(limits) != 2:
                     raise ValueError(
-                        "second argument must be a (soft, hard) tuple, "
-                        "got %s" % repr(limits))
+                        "second argument must be a (soft, hard) tuple, got %s"
+                        % repr(limits)
+                    )
                 soft, hard = limits
                 return cext.proc_setrlimit(self.pid, resource, soft, hard)
diff --git a/contrib/python/psutil/py3/psutil/_pslinux.py b/contrib/python/psutil/py3/psutil/_pslinux.py
index c1dc52dd5f..bab70b5d20 100644
--- a/contrib/python/psutil/py3/psutil/_pslinux.py
+++ b/contrib/python/psutil/py3/psutil/_pslinux.py
@@ -16,7 +16,6 @@ import re
 import socket
 import struct
 import sys
-import traceback
 import warnings
 from collections import defaultdict
 from collections import namedtuple
@@ -25,37 +24,41 @@ from . import _common
 from . import _psposix
 from . import _psutil_linux as cext
 from . import _psutil_posix as cext_posix
+from ._common import NIC_DUPLEX_FULL
+from ._common import NIC_DUPLEX_HALF
+from ._common import NIC_DUPLEX_UNKNOWN
 from ._common import AccessDenied
+from ._common import NoSuchProcess
+from ._common import ZombieProcess
+from ._common import bcat
+from ._common import cat
 from ._common import debug
 from ._common import decode
 from ._common import get_procfs_path
 from ._common import isfile_strict
 from ._common import memoize
 from ._common import memoize_when_activated
-from ._common import NIC_DUPLEX_FULL
-from ._common import NIC_DUPLEX_HALF
-from ._common import NIC_DUPLEX_UNKNOWN
-from ._common import NoSuchProcess
 from ._common import open_binary
 from ._common import open_text
 from ._common import parse_environ_block
 from ._common import path_exists_strict
 from ._common import supports_ipv6
 from ._common import usage_percent
-from ._common import ZombieProcess
-from ._compat import b
-from ._compat import basestring
+from ._compat import PY3
 from ._compat import FileNotFoundError
 from ._compat import PermissionError
 from ._compat import ProcessLookupError
-from ._compat import PY3
+from ._compat import b
+from ._compat import basestring
+
 
-if sys.version_info >= (3, 4):
+if PY3:
     import enum
 else:
     enum = None
 
 
+# fmt: off
 __extra__all__ = [
     #
     'PROCFS_PATH',
@@ -65,7 +68,9 @@ __extra__all__ = [
     # connection status constants
     "CONN_ESTABLISHED", "CONN_SYN_SENT", "CONN_SYN_RECV", "CONN_FIN_WAIT1",
     "CONN_FIN_WAIT2", "CONN_TIME_WAIT", "CONN_CLOSE", "CONN_CLOSE_WAIT",
-    "CONN_LAST_ACK", "CONN_LISTEN", "CONN_CLOSING", ]
+    "CONN_LAST_ACK", "CONN_LISTEN", "CONN_CLOSING",
+]
+# fmt: on
 
 
 # =====================================================================
@@ -74,19 +79,15 @@ __extra__all__ = [
 
 
 POWER_SUPPLY_PATH = "/sys/class/power_supply"
-HAS_SMAPS = os.path.exists('/proc/%s/smaps' % os.getpid())
+HAS_PROC_SMAPS = os.path.exists('/proc/%s/smaps' % os.getpid())
+HAS_PROC_SMAPS_ROLLUP = os.path.exists('/proc/%s/smaps_rollup' % os.getpid())
 HAS_PROC_IO_PRIORITY = hasattr(cext, "proc_ioprio_get")
 HAS_CPU_AFFINITY = hasattr(cext, "proc_cpu_affinity_get")
-_DEFAULT = object()
 
 # Number of clock ticks per second
 CLOCK_TICKS = os.sysconf("SC_CLK_TCK")
 PAGESIZE = cext_posix.getpagesize()
 BOOT_TIME = None  # set later
-# Used when reading "big" files, namely /proc/{pid}/smaps and /proc/net/*.
-# On Python 2, using a buffer with open() for such files may result in a
-# speedup, see: https://github.com/giampaolo/psutil/issues/708
-BIGFILE_BUFFERING = -1 if PY3 else 8192
 LITTLE_ENDIAN = sys.byteorder == 'little'
 
 # "man iostat" states that sectors are equivalent with blocks and have
@@ -105,8 +106,9 @@ DISK_SECTOR_SIZE = 512
 if enum is None:
     AF_LINK = socket.AF_PACKET
 else:
-    AddressFamily = enum.IntEnum('AddressFamily',
-                                 {'AF_LINK': int(socket.AF_PACKET)})
+    AddressFamily = enum.IntEnum(
+        'AddressFamily', {'AF_LINK': int(socket.AF_PACKET)}
+    )
     AF_LINK = AddressFamily.AF_LINK
 
 # ioprio_* constants http://linux.die.net/man/2/ioprio_get
@@ -116,6 +118,7 @@ if enum is None:
     IOPRIO_CLASS_BE = 2
     IOPRIO_CLASS_IDLE = 3
 else:
+
     class IOPriority(enum.IntEnum):
         IOPRIO_CLASS_NONE = 0
         IOPRIO_CLASS_RT = 1
@@ -155,7 +158,7 @@ TCP_STATUSES = {
     "08": _common.CONN_CLOSE_WAIT,
     "09": _common.CONN_LAST_ACK,
     "0A": _common.CONN_LISTEN,
-    "0B": _common.CONN_CLOSING
+    "0B": _common.CONN_CLOSING,
 }
 
 
@@ -164,6 +167,7 @@ TCP_STATUSES = {
 # =====================================================================
 
 
+# fmt: off
 # psutil.virtual_memory()
 svmem = namedtuple(
     'svmem', ['total', 'available', 'percent', 'used', 'free',
@@ -198,6 +202,7 @@ pio = namedtuple('pio', ['read_count', 'write_count',
 pcputimes = namedtuple('pcputimes',
                        ['user', 'system', 'children_user', 'children_system',
                         'iowait'])
+# fmt: on
 
 
 # =====================================================================
@@ -244,7 +249,7 @@ def is_storage_device(name):
     "nvme0n1p1"). If name is a virtual device (e.g. "loop1", "ram")
     return True.
     """
-    # Readapted from iostat source code, see:
+    # Re-adapted from iostat source code, see:
     # https://github.com/sysstat/sysstat/blob/
     #     97912938cd476645b267280069e83b1c8dc0e1c7/common.c#L208
     # Some devices may have a slash in their name (e.g. cciss/c0d0...).
@@ -282,27 +287,11 @@ def set_scputimes_ntuple(procfs_path):
     scputimes = namedtuple('scputimes', fields)
 
 
-def cat(fname, fallback=_DEFAULT, binary=True):
-    """Return file content.
-    fallback: the value returned in case the file does not exist or
-              cannot be read
-    binary: whether to open the file in binary or text mode.
-    """
-    try:
-        with open_binary(fname) if binary else open_text(fname) as f:
-            return f.read().strip()
-    except (IOError, OSError):
-        if fallback is not _DEFAULT:
-            return fallback
-        else:
-            raise
-
-
 try:
     set_scputimes_ntuple("/proc")
-except Exception:  # pragma: no cover
+except Exception as err:  # noqa: BLE001
     # Don't want to crash at import time.
-    traceback.print_exc()
+    debug("ignoring exception on import: %r" % err)
     scputimes = namedtuple('scputimes', 'user system idle')(0.0, 0.0, 0.0)
 
 
@@ -331,8 +320,10 @@ except ImportError:
 
         def prlimit(pid, resource_, limits=None):
             class StructRlimit(ctypes.Structure):
-                _fields_ = [('rlim_cur', ctypes.c_longlong),
-                            ('rlim_max', ctypes.c_longlong)]
+                _fields_ = [
+                    ('rlim_cur', ctypes.c_longlong),
+                    ('rlim_max', ctypes.c_longlong),
+                ]
 
             current = StructRlimit()
             if limits is None:
@@ -344,17 +335,19 @@ except ImportError:
                 new.rlim_cur = limits[0]
                 new.rlim_max = limits[1]
                 ret = libc.prlimit(
-                    pid, resource_, ctypes.byref(new), ctypes.byref(current))
+                    pid, resource_, ctypes.byref(new), ctypes.byref(current)
+                )
 
             if ret != 0:
-                errno = ctypes.get_errno()
-                raise OSError(errno, os.strerror(errno))
+                errno_ = ctypes.get_errno()
+                raise OSError(errno_, os.strerror(errno_))
             return (current.rlim_cur, current.rlim_max)
 
 
 if prlimit is not None:
     __extra__all__.extend(
-        [x for x in dir(cext) if x.startswith('RLIM') and x.isupper()])
+        [x for x in dir(cext) if x.startswith('RLIM') and x.isupper()]
+    )
 
 
 # =====================================================================
@@ -364,34 +357,46 @@ if prlimit is not None:
 
 def calculate_avail_vmem(mems):
     """Fallback for kernels < 3.14 where /proc/meminfo does not provide
-    "MemAvailable:" column, see:
-    https://blog.famzah.net/2014/09/24/
+    "MemAvailable", see:
+    https://blog.famzah.net/2014/09/24/.
+
     This code reimplements the algorithm outlined here:
     https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/
         commit/?id=34e431b0ae398fc54ea69ff85ec700722c9da773
 
-    XXX: on recent kernels this calculation differs by ~1.5% than
-    "MemAvailable:" as it's calculated slightly differently, see:
-    https://gitlab.com/procps-ng/procps/issues/42
-    https://github.com/famzah/linux-memavailable-procfs/issues/2
+    We use this function also when "MemAvailable" returns 0 (possibly a
+    kernel bug, see: https://github.com/giampaolo/psutil/issues/1915).
+    In that case this routine matches "free" CLI tool result ("available"
+    column).
+
+    XXX: on recent kernels this calculation may differ by ~1.5% compared
+    to "MemAvailable:", as it's calculated slightly differently.
     It is still way more realistic than doing (free + cached) though.
+    See:
+    * https://gitlab.com/procps-ng/procps/issues/42
+    * https://github.com/famzah/linux-memavailable-procfs/issues/2
     """
-    # Fallback for very old distros. According to
+    # Note about "fallback" value. According to:
     # https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/
     #     commit/?id=34e431b0ae398fc54ea69ff85ec700722c9da773
-    # ...long ago "avail" was calculated as (free + cached).
-    # We might fallback in such cases:
-    # "Active(file)" not available: 2.6.28 / Dec 2008
-    # "Inactive(file)" not available: 2.6.28 / Dec 2008
-    # "SReclaimable:" not available: 2.6.19 / Nov 2006
-    # /proc/zoneinfo not available: 2.6.13 / Aug 2005
+    # ...long ago "available" memory was calculated as (free + cached),
+    # We use fallback when one of these is missing from /proc/meminfo:
+    # "Active(file)": introduced in 2.6.28 / Dec 2008
+    # "Inactive(file)": introduced in 2.6.28 / Dec 2008
+    # "SReclaimable": introduced in 2.6.19 / Nov 2006
+    # /proc/zoneinfo: introduced in 2.6.13 / Aug 2005
     free = mems[b'MemFree:']
     fallback = free + mems.get(b"Cached:", 0)
     try:
         lru_active_file = mems[b'Active(file):']
         lru_inactive_file = mems[b'Inactive(file):']
         slab_reclaimable = mems[b'SReclaimable:']
-    except KeyError:
+    except KeyError as err:
+        debug(
+            "%s is missing from /proc/meminfo; using an approximation for "
+            "calculating available memory"
+            % err.args[0]
+        )
         return fallback
     try:
         f = open_binary('%s/zoneinfo' % get_procfs_path())
@@ -416,19 +421,11 @@ def calculate_avail_vmem(mems):
 
 def virtual_memory():
     """Report virtual memory stats.
-    This implementation matches "free" and "vmstat -s" cmdline
-    utility values and procps-ng-3.3.12 source was used as a reference
-    (2016-09-18):
+    This implementation mimicks procps-ng-3.3.12, aka "free" CLI tool:
     https://gitlab.com/procps-ng/procps/blob/
-        24fd2605c51fccc375ab0287cec33aa767f06718/proc/sysinfo.c
-    For reference, procps-ng-3.3.10 is the version available on Ubuntu
-    16.04.
-
-    Note about "available" memory: up until psutil 4.3 it was
-    calculated as "avail = (free + buffers + cached)". Now
-    "MemAvailable:" column (kernel 3.14) from /proc/meminfo is used as
-    it's more accurate.
-    That matches "available" column in newer versions of "free".
+        24fd2605c51fccc375ab0287cec33aa767f06718/proc/sysinfo.c#L778-791
+    The returned values are supposed to match both "free" and "vmstat -s"
+    CLI tools.
     """
     missing_fields = []
     mems = {}
@@ -480,10 +477,11 @@ def virtual_memory():
         inactive = mems[b"Inactive:"]
     except KeyError:
         try:
-            inactive = \
-                mems[b"Inact_dirty:"] + \
-                mems[b"Inact_clean:"] + \
-                mems[b"Inact_laundry:"]
+            inactive = (
+                mems[b"Inact_dirty:"]
+                + mems[b"Inact_clean:"]
+                + mems[b"Inact_laundry:"]
+            )
         except KeyError:
             inactive = 0
             missing_fields.append('inactive')
@@ -510,17 +508,23 @@ def virtual_memory():
         avail = mems[b'MemAvailable:']
     except KeyError:
         avail = calculate_avail_vmem(mems)
+    else:
+        if avail == 0:
+            # Yes, it can happen (probably a kernel bug):
+            # https://github.com/giampaolo/psutil/issues/1915
+            # In this case "free" CLI tool makes an estimate. We do the same,
+            # and it matches "free" CLI tool.
+            avail = calculate_avail_vmem(mems)
 
     if avail < 0:
         avail = 0
         missing_fields.append('available')
-
-    # If avail is greater than total or our calculation overflows,
-    # that's symptomatic of running within a LCX container where such
-    # values will be dramatically distorted over those of the host.
-    # https://gitlab.com/procps-ng/procps/blob/
-    #     24fd2605c51fccc375ab0287cec33aa767f06718/proc/sysinfo.c#L764
-    if avail > total:
+    elif avail > total:
+        # If avail is greater than total or our calculation overflows,
+        # that's symptomatic of running within a LCX container where such
+        # values will be dramatically distorted over those of the host.
+        # https://gitlab.com/procps-ng/procps/blob/
+        #     24fd2605c51fccc375ab0287cec33aa767f06718/proc/sysinfo.c#L764
         avail = free
 
     percent = usage_percent((total - avail), total, round_=1)
@@ -529,11 +533,23 @@ def virtual_memory():
     if missing_fields:
         msg = "%s memory stats couldn't be determined and %s set to 0" % (
             ", ".join(missing_fields),
-            "was" if len(missing_fields) == 1 else "were")
-        warnings.warn(msg, RuntimeWarning)
-
-    return svmem(total, avail, percent, used, free,
-                 active, inactive, buffers, cached, shared, slab)
+            "was" if len(missing_fields) == 1 else "were",
+        )
+        warnings.warn(msg, RuntimeWarning, stacklevel=2)
+
+    return svmem(
+        total,
+        avail,
+        percent,
+        used,
+        free,
+        active,
+        inactive,
+        buffers,
+        cached,
+        shared,
+        slab,
+    )
 
 
 def swap_memory():
@@ -562,9 +578,11 @@ def swap_memory():
         f = open_binary("%s/vmstat" % get_procfs_path())
     except IOError as err:
         # see https://github.com/giampaolo/psutil/issues/722
-        msg = "'sin' and 'sout' swap memory stats couldn't " \
-              "be determined and were set to 0 (%s)" % str(err)
-        warnings.warn(msg, RuntimeWarning)
+        msg = (
+            "'sin' and 'sout' swap memory stats couldn't "
+            + "be determined and were set to 0 (%s)" % str(err)
+        )
+        warnings.warn(msg, RuntimeWarning, stacklevel=2)
         sin = sout = 0
     else:
         with f:
@@ -582,9 +600,9 @@ def swap_memory():
                 # we might get here when dealing with exotic Linux
                 # flavors, see:
                 # https://github.com/giampaolo/psutil/issues/313
-                msg = "'sin' and 'sout' swap memory stats couldn't " \
-                      "be determined and were set to 0"
-                warnings.warn(msg, RuntimeWarning)
+                msg = "'sin' and 'sout' swap memory stats couldn't "
+                msg += "be determined and were set to 0"
+                warnings.warn(msg, RuntimeWarning, stacklevel=2)
                 sin = sout = 0
     return _common.sswap(total, used, free, percent, sin, sout)
 
@@ -605,7 +623,7 @@ def cpu_times():
     set_scputimes_ntuple(procfs_path)
     with open_binary('%s/stat' % procfs_path) as f:
         values = f.readline().split()
-    fields = values[1:len(scputimes._fields) + 1]
+    fields = values[1 : len(scputimes._fields) + 1]
     fields = [float(x) / CLOCK_TICKS for x in fields]
     return scputimes(*fields)
 
@@ -623,7 +641,7 @@ def per_cpu_times():
         for line in f:
             if line.startswith(b'cpu'):
                 values = line.split()
-                fields = values[1:len(scputimes._fields) + 1]
+                fields = values[1 : len(scputimes._fields) + 1]
                 fields = [float(x) / CLOCK_TICKS for x in fields]
                 entry = scputimes(*fields)
                 cpus.append(entry)
@@ -659,8 +677,8 @@ def cpu_count_logical():
         return num
 
 
-def cpu_count_physical():
-    """Return the number of physical cores in the system."""
+def cpu_count_cores():
+    """Return the number of CPU cores in the system."""
     # Method #1
     ls = set()
     # These 2 files are the same but */core_cpus_list is newer while
@@ -686,8 +704,9 @@ def cpu_count_physical():
             if not line:
                 # new section
                 try:
-                    mapping[current_info[b'physical id']] = \
-                        current_info[b'cpu cores']
+                    mapping[current_info[b'physical id']] = current_info[
+                        b'cpu cores'
+                    ]
                 except KeyError:
                     pass
                 current_info = {}
@@ -714,66 +733,71 @@ def cpu_stats():
                 interrupts = int(line.split()[1])
             elif line.startswith(b'softirq'):
                 soft_interrupts = int(line.split()[1])
-            if ctx_switches is not None and soft_interrupts is not None \
-                    and interrupts is not None:
+            if (
+                ctx_switches is not None
+                and soft_interrupts is not None
+                and interrupts is not None
+            ):
                 break
     syscalls = 0
     return _common.scpustats(
-        ctx_switches, interrupts, soft_interrupts, syscalls)
+        ctx_switches, interrupts, soft_interrupts, syscalls
+    )
+
+
+def _cpu_get_cpuinfo_freq():
+    """Return current CPU frequency from cpuinfo if available."""
+    ret = []
+    with open_binary('%s/cpuinfo' % get_procfs_path()) as f:
+        for line in f:
+            if line.lower().startswith(b'cpu mhz'):
+                ret.append(float(line.split(b':', 1)[1]))
+    return ret
 
 
-if os.path.exists("/sys/devices/system/cpu/cpufreq/policy0") or \
-        os.path.exists("/sys/devices/system/cpu/cpu0/cpufreq"):
+if os.path.exists("/sys/devices/system/cpu/cpufreq/policy0") or os.path.exists(
+    "/sys/devices/system/cpu/cpu0/cpufreq"
+):
+
     def cpu_freq():
         """Return frequency metrics for all CPUs.
         Contrarily to other OSes, Linux updates these values in
         real-time.
         """
-        def get_path(num):
-            for p in ("/sys/devices/system/cpu/cpufreq/policy%s" % num,
-                      "/sys/devices/system/cpu/cpu%s/cpufreq" % num):
-                if os.path.exists(p):
-                    return p
-
+        cpuinfo_freqs = _cpu_get_cpuinfo_freq()
+        paths = glob.glob(
+            "/sys/devices/system/cpu/cpufreq/policy[0-9]*"
+        ) or glob.glob("/sys/devices/system/cpu/cpu[0-9]*/cpufreq")
+        paths.sort(key=lambda x: int(re.search(r"[0-9]+", x).group()))
         ret = []
-        for n in range(cpu_count_logical()):
-            path = get_path(n)
-            if not path:
-                continue
-
-            pjoin = os.path.join
-            curr = cat(pjoin(path, "scaling_cur_freq"), fallback=None)
+        pjoin = os.path.join
+        for i, path in enumerate(paths):
+            if len(paths) == len(cpuinfo_freqs):
+                # take cached value from cpuinfo if available, see:
+                # https://github.com/giampaolo/psutil/issues/1851
+                curr = cpuinfo_freqs[i] * 1000
+            else:
+                curr = bcat(pjoin(path, "scaling_cur_freq"), fallback=None)
             if curr is None:
                 # Likely an old RedHat, see:
                 # https://github.com/giampaolo/psutil/issues/1071
-                curr = cat(pjoin(path, "cpuinfo_cur_freq"), fallback=None)
+                curr = bcat(pjoin(path, "cpuinfo_cur_freq"), fallback=None)
                 if curr is None:
-                    raise NotImplementedError(
-                        "can't find current frequency file")
+                    msg = "can't find current frequency file"
+                    raise NotImplementedError(msg)
             curr = int(curr) / 1000
-            max_ = int(cat(pjoin(path, "scaling_max_freq"))) / 1000
-            min_ = int(cat(pjoin(path, "scaling_min_freq"))) / 1000
+            max_ = int(bcat(pjoin(path, "scaling_max_freq"))) / 1000
+            min_ = int(bcat(pjoin(path, "scaling_min_freq"))) / 1000
             ret.append(_common.scpufreq(curr, min_, max_))
         return ret
 
-elif os.path.exists("/proc/cpuinfo"):
+else:
+
     def cpu_freq():
         """Alternate implementation using /proc/cpuinfo.
         min and max frequencies are not available and are set to None.
         """
-        ret = []
-        with open_binary('%s/cpuinfo' % get_procfs_path()) as f:
-            for line in f:
-                if line.lower().startswith(b'cpu mhz'):
-                    key, value = line.split(b':', 1)
-                    ret.append(_common.scpufreq(float(value), 0., 0.))
-        return ret
-
-else:
-    def cpu_freq():
-        """Dummy implementation when none of the above files are present.
-        """
-        return []
+        return [_common.scpufreq(x, 0.0, 0.0) for x in _cpu_get_cpuinfo_freq()]
 
 
 # =====================================================================
@@ -837,6 +861,10 @@ class Connections:
                 if err.errno == errno.EINVAL:
                     # not a link
                     continue
+                if err.errno == errno.ENAMETOOLONG:
+                    # file name too long
+                    debug(err)
+                    continue
                 raise
             else:
                 if inode.startswith('socket:['):
@@ -899,11 +927,13 @@ class Connections:
                 if LITTLE_ENDIAN:
                     ip = socket.inet_ntop(
                         socket.AF_INET6,
-                        struct.pack('>4I', *struct.unpack('<4I', ip)))
+                        struct.pack('>4I', *struct.unpack('<4I', ip)),
+                    )
                 else:
                     ip = socket.inet_ntop(
                         socket.AF_INET6,
-                        struct.pack('<4I', *struct.unpack('<4I', ip)))
+                        struct.pack('<4I', *struct.unpack('<4I', ip)),
+                    )
             except ValueError:
                 # see: https://github.com/giampaolo/psutil/issues/623
                 if not supports_ipv6():
@@ -918,22 +948,24 @@ class Connections:
         if file.endswith('6') and not os.path.exists(file):
             # IPv6 not supported
             return
-        with open_text(file, buffering=BIGFILE_BUFFERING) as f:
+        with open_text(file) as f:
             f.readline()  # skip the first line
             for lineno, line in enumerate(f, 1):
                 try:
-                    _, laddr, raddr, status, _, _, _, _, _, inode = \
+                    _, laddr, raddr, status, _, _, _, _, _, inode = (
                         line.split()[:10]
+                    )
                 except ValueError:
                     raise RuntimeError(
-                        "error while parsing %s; malformed line %s %r" % (
-                            file, lineno, line))
+                        "error while parsing %s; malformed line %s %r"
+                        % (file, lineno, line)
+                    )
                 if inode in inodes:
                     # # We assume inet sockets are unique, so we error
                     # # out if there are multiple references to the
                     # # same inode. We won't do this for UNIX sockets.
                     # if len(inodes[inode]) > 1 and family != socket.AF_UNIX:
-                    #     raise ValueError("ambiguos inode with multiple "
+                    #     raise ValueError("ambiguous inode with multiple "
                     #                      "PIDs references")
                     pid, fd = inodes[inode][0]
                 else:
@@ -955,7 +987,7 @@ class Connections:
     @staticmethod
     def process_unix(file, family, inodes, filter_pid=None):
         """Parse /proc/net/unix files."""
-        with open_text(file, buffering=BIGFILE_BUFFERING) as f:
+        with open_text(file) as f:
             f.readline()  # skip the first line
             for line in f:
                 tokens = line.split()
@@ -966,9 +998,10 @@ class Connections:
                         # see: https://github.com/giampaolo/psutil/issues/766
                         continue
                     raise RuntimeError(
-                        "error while parsing %s; malformed line %r" % (
-                            file, line))
-                if inode in inodes:
+                        "error while parsing %s; malformed line %r"
+                        % (file, line)
+                    )
+                if inode in inodes:  # noqa
                     # With UNIX sockets we can have a single inode
                     # referencing many file descriptors.
                     pairs = inodes[inode]
@@ -978,10 +1011,7 @@ class Connections:
                     if filter_pid is not None and filter_pid != pid:
                         continue
                     else:
-                        if len(tokens) == 8:
-                            path = tokens[-1]
-                        else:
-                            path = ""
+                        path = tokens[-1] if len(tokens) == 8 else ''
                         type_ = _common.socktype_to_enum(int(type_))
                         # XXX: determining the remote endpoint of a
                         # UNIX socket on Linux is not possible, see:
@@ -992,8 +1022,10 @@ class Connections:
 
     def retrieve(self, kind, pid=None):
         if kind not in self.tmap:
-            raise ValueError("invalid %r kind argument; choose between %s"
-                             % (kind, ', '.join([repr(x) for x in self.tmap])))
+            raise ValueError(
+                "invalid %r kind argument; choose between %s"
+                % (kind, ', '.join([repr(x) for x in self.tmap]))
+            )
         self._procfs_path = get_procfs_path()
         if pid is not None:
             inodes = self.get_proc_inodes(pid)
@@ -1007,17 +1039,19 @@ class Connections:
             path = "%s/net/%s" % (self._procfs_path, proto_name)
             if family in (socket.AF_INET, socket.AF_INET6):
                 ls = self.process_inet(
-                    path, family, type_, inodes, filter_pid=pid)
+                    path, family, type_, inodes, filter_pid=pid
+                )
             else:
-                ls = self.process_unix(
-                    path, family, inodes, filter_pid=pid)
+                ls = self.process_unix(path, family, inodes, filter_pid=pid)
             for fd, family, type_, laddr, raddr, status, bound_pid in ls:
                 if pid:
-                    conn = _common.pconn(fd, family, type_, laddr, raddr,
-                                         status)
+                    conn = _common.pconn(
+                        fd, family, type_, laddr, raddr, status
+                    )
                 else:
-                    conn = _common.sconn(fd, family, type_, laddr, raddr,
-                                         status, bound_pid)
+                    conn = _common.sconn(
+                        fd, family, type_, laddr, raddr, status, bound_pid
+                    )
                 ret.add(conn)
         return list(ret)
 
@@ -1041,50 +1075,68 @@ def net_io_counters():
         colon = line.rfind(':')
         assert colon > 0, repr(line)
         name = line[:colon].strip()
-        fields = line[colon + 1:].strip().split()
+        fields = line[colon + 1 :].strip().split()
 
         # in
-        (bytes_recv,
-         packets_recv,
-         errin,
-         dropin,
-         fifoin,  # unused
-         framein,  # unused
-         compressedin,  # unused
-         multicastin,  # unused
-         # out
-         bytes_sent,
-         packets_sent,
-         errout,
-         dropout,
-         fifoout,  # unused
-         collisionsout,  # unused
-         carrierout,  # unused
-         compressedout) = map(int, fields)
-
-        retdict[name] = (bytes_sent, bytes_recv, packets_sent, packets_recv,
-                         errin, errout, dropin, dropout)
+        (
+            bytes_recv,
+            packets_recv,
+            errin,
+            dropin,
+            fifoin,  # unused
+            framein,  # unused
+            compressedin,  # unused
+            multicastin,  # unused
+            # out
+            bytes_sent,
+            packets_sent,
+            errout,
+            dropout,
+            fifoout,  # unused
+            collisionsout,  # unused
+            carrierout,  # unused
+            compressedout,
+        ) = map(int, fields)
+
+        retdict[name] = (
+            bytes_sent,
+            bytes_recv,
+            packets_sent,
+            packets_recv,
+            errin,
+            errout,
+            dropin,
+            dropout,
+        )
     return retdict
 
 
 def net_if_stats():
     """Get NIC stats (isup, duplex, speed, mtu)."""
-    duplex_map = {cext.DUPLEX_FULL: NIC_DUPLEX_FULL,
-                  cext.DUPLEX_HALF: NIC_DUPLEX_HALF,
-                  cext.DUPLEX_UNKNOWN: NIC_DUPLEX_UNKNOWN}
+    duplex_map = {
+        cext.DUPLEX_FULL: NIC_DUPLEX_FULL,
+        cext.DUPLEX_HALF: NIC_DUPLEX_HALF,
+        cext.DUPLEX_UNKNOWN: NIC_DUPLEX_UNKNOWN,
+    }
     names = net_io_counters().keys()
     ret = {}
     for name in names:
         try:
             mtu = cext_posix.net_if_mtu(name)
-            isup = cext_posix.net_if_is_running(name)
+            flags = cext_posix.net_if_flags(name)
             duplex, speed = cext.net_if_duplex_speed(name)
         except OSError as err:
             # https://github.com/giampaolo/psutil/issues/1279
             if err.errno != errno.ENODEV:
                 raise
+            else:
+                debug(err)
         else:
-            ret[name] = _common.snicstats(isup, duplex_map[duplex], speed, mtu)
+            output_flags = ','.join(flags)
+            isup = 'running' in flags
+            ret[name] = _common.snicstats(
+                isup, duplex_map[duplex], speed, mtu, output_flags
+            )
     return ret
 
 
@@ -1100,6 +1152,7 @@ def disk_io_counters(perdisk=False):
     """Return disk I/O statistics for every disk installed on the
     system as a dict of raw tuples.
     """
+
     def read_procfs():
         # OK, this is a bit confusing. The format of /proc/diskstats can
         # have 3 variations.
@@ -1122,6 +1175,7 @@ def disk_io_counters(perdisk=False):
         for line in lines:
             fields = line.split()
             flen = len(fields)
+            # fmt: off
             if flen == 15:
                 # Linux 2.4
                 name = fields[3]
@@ -1142,6 +1196,7 @@ def disk_io_counters(perdisk=False):
                 raise ValueError("not sure how to interpret line %r" % line)
             yield (name, reads, writes, rbytes, wbytes, rtime, wtime,
                    reads_merged, writes_merged, busy_time)
+            # fmt: on
 
     def read_sysfs():
         for block in os.listdir('/sys/block'):
@@ -1151,10 +1206,12 @@ def disk_io_counters(perdisk=False):
                 with open_text(os.path.join(root, 'stat')) as f:
                     fields = f.read().strip().split()
                 name = os.path.basename(root)
+                # fmt: off
                 (reads, reads_merged, rbytes, rtime, writes, writes_merged,
                     wbytes, wtime, _, busy_time) = map(int, fields[:10])
                 yield (name, reads, writes, rbytes, wbytes, rtime,
                        wtime, reads_merged, writes_merged, busy_time)
+                # fmt: on
 
     if os.path.exists('%s/diskstats' % get_procfs_path()):
         gen = read_procfs()
@@ -1163,10 +1220,13 @@ def disk_io_counters(perdisk=False):
     else:
         raise NotImplementedError(
             "%s/diskstats nor /sys/block filesystem are available on this "
-            "system" % get_procfs_path())
+            "system"
+            % get_procfs_path()
+        )
 
     retdict = {}
     for entry in gen:
+        # fmt: off
         (name, reads, writes, rbytes, wbytes, rtime, wtime, reads_merged,
             writes_merged, busy_time) = entry
         if not perdisk and not is_storage_device(name):
@@ -1187,24 +1247,101 @@ def disk_io_counters(perdisk=False):
         wbytes *= DISK_SECTOR_SIZE
         retdict[name] = (reads, writes, rbytes, wbytes, rtime, wtime,
                          reads_merged, writes_merged, busy_time)
+        # fmt: on
 
     return retdict
 
 
+class RootFsDeviceFinder:
+    """disk_partitions() may return partitions with device == "/dev/root"
+    or "rootfs". This container class uses different strategies to try to
+    obtain the real device path. Resources:
+    https://bootlin.com/blog/find-root-device/
+    https://www.systutorials.com/how-to-find-the-disk-where-root-is-on-in-bash-on-linux/.
+    """
+
+    __slots__ = ['major', 'minor']
+
+    def __init__(self):
+        dev = os.stat("/").st_dev
+        self.major = os.major(dev)
+        self.minor = os.minor(dev)
+
+    def ask_proc_partitions(self):
+        with open_text("%s/partitions" % get_procfs_path()) as f:
+            for line in f.readlines()[2:]:
+                fields = line.split()
+                if len(fields) < 4:  # just for extra safety
+                    continue
+                major = int(fields[0]) if fields[0].isdigit() else None
+                minor = int(fields[1]) if fields[1].isdigit() else None
+                name = fields[3]
+                if major == self.major and minor == self.minor:
+                    if name:  # just for extra safety
+                        return "/dev/%s" % name
+
+    def ask_sys_dev_block(self):
+        path = "/sys/dev/block/%s:%s/uevent" % (self.major, self.minor)
+        with open_text(path) as f:
+            for line in f:
+                if line.startswith("DEVNAME="):
+                    name = line.strip().rpartition("DEVNAME=")[2]
+                    if name:  # just for extra safety
+                        return "/dev/%s" % name
+
+    def ask_sys_class_block(self):
+        needle = "%s:%s" % (self.major, self.minor)
+        files = glob.iglob("/sys/class/block/*/dev")
+        for file in files:
+            try:
+                f = open_text(file)
+            except FileNotFoundError:  # race condition
+                continue
+            else:
+                with f:
+                    data = f.read().strip()
+                    if data == needle:
+                        name = os.path.basename(os.path.dirname(file))
+                        return "/dev/%s" % name
+
+    def find(self):
+        path = None
+        if path is None:
+            try:
+                path = self.ask_proc_partitions()
+            except (IOError, OSError) as err:
+                debug(err)
+        if path is None:
+            try:
+                path = self.ask_sys_dev_block()
+            except (IOError, OSError) as err:
+                debug(err)
+        if path is None:
+            try:
+                path = self.ask_sys_class_block()
+            except (IOError, OSError) as err:
+                debug(err)
+        # We use exists() because the "/dev/*" part of the path is hard
+        # coded, so we want to be sure.
+        if path is not None and os.path.exists(path):
+            return path
+
+
 def disk_partitions(all=False):
     """Return mounted disk partitions as a list of namedtuples."""
     fstypes = set()
     procfs_path = get_procfs_path()
-    with open_text("%s/filesystems" % procfs_path) as f:
-        for line in f:
-            line = line.strip()
-            if not line.startswith("nodev"):
-                fstypes.add(line.strip())
-            else:
-                # ignore all lines starting with "nodev" except "nodev zfs"
-                fstype = line.split("\t")[1]
-                if fstype == "zfs":
-                    fstypes.add("zfs")
+    if not all:
+        with open_text("%s/filesystems" % procfs_path) as f:
+            for line in f:
+                line = line.strip()
+                if not line.startswith("nodev"):
+                    fstypes.add(line.strip())
+                else:
+                    # ignore all lines starting with "nodev" except "nodev zfs"
+                    fstype = line.split("\t")[1]
+                    if fstype == "zfs":
+                        fstypes.add("zfs")
 
     # See: https://github.com/giampaolo/psutil/issues/1307
     if procfs_path == "/proc" and os.path.isfile('/etc/mtab'):
@@ -1218,12 +1355,15 @@ def disk_partitions(all=False):
         device, mountpoint, fstype, opts = partition
         if device == 'none':
             device = ''
+        if device in ("/dev/root", "rootfs"):
+            device = RootFsDeviceFinder().find() or device
         if not all:
             if device == '' or fstype not in fstypes:
                 continue
         maxfile = maxpath = None  # set later
-        ntuple = _common.sdiskpart(device, mountpoint, fstype, opts,
-                                   maxfile, maxpath)
+        ntuple = _common.sdiskpart(
+            device, mountpoint, fstype, opts, maxfile, maxpath
+        )
         retlist.append(ntuple)
 
     return retlist
@@ -1260,7 +1400,8 @@ def sensors_temperatures():
     # https://github.com/giampaolo/psutil/issues/1708
     # https://github.com/giampaolo/psutil/pull/1648
     basenames2 = glob.glob(
-        '/sys/devices/platform/coretemp.*/hwmon/hwmon*/temp*_*')
+        '/sys/devices/platform/coretemp.*/hwmon/hwmon*/temp*_*'
+    )
     repl = re.compile('/sys/devices/platform/coretemp.*/hwmon/')
     for name in basenames2:
         altname = repl.sub('/sys/class/hwmon/', name)
@@ -1270,9 +1411,9 @@ def sensors_temperatures():
     for base in basenames:
         try:
             path = base + '_input'
-            current = float(cat(path)) / 1000.0
+            current = float(bcat(path)) / 1000.0
             path = os.path.join(os.path.dirname(base), 'name')
-            unit_name = cat(path, binary=False)
+            unit_name = cat(path).strip()
         except (IOError, OSError, ValueError):
             # A lot of things can go wrong here, so let's just skip the
             # whole entry. Sure thing is Linux's /sys/class/hwmon really
@@ -1284,9 +1425,9 @@ def sensors_temperatures():
             # https://github.com/giampaolo/psutil/issues/1323
             continue
 
-        high = cat(base + '_max', fallback=None)
-        critical = cat(base + '_crit', fallback=None)
-        label = cat(base + '_label', fallback='', binary=False)
+        high = bcat(base + '_max', fallback=None)
+        critical = bcat(base + '_crit', fallback=None)
+        label = cat(base + '_label', fallback='').strip()
 
         if high is not None:
             try:
@@ -1309,27 +1450,31 @@ def sensors_temperatures():
         for base in basenames:
             try:
                 path = os.path.join(base, 'temp')
-                current = float(cat(path)) / 1000.0
+                current = float(bcat(path)) / 1000.0
                 path = os.path.join(base, 'type')
-                unit_name = cat(path, binary=False)
+                unit_name = cat(path).strip()
             except (IOError, OSError, ValueError) as err:
-                debug("ignoring %r for file %r" % (err, path))
+                debug(err)
                 continue
 
             trip_paths = glob.glob(base + '/trip_point*')
-            trip_points = set(['_'.join(
-                os.path.basename(p).split('_')[0:3]) for p in trip_paths])
+            trip_points = set([
+                '_'.join(os.path.basename(p).split('_')[0:3])
+                for p in trip_paths
+            ])
             critical = None
             high = None
             for trip_point in trip_points:
                 path = os.path.join(base, trip_point + "_type")
-                trip_type = cat(path, fallback='', binary=False)
+                trip_type = cat(path, fallback='').strip()
                 if trip_type == 'critical':
-                    critical = cat(os.path.join(base, trip_point + "_temp"),
-                                   fallback=None)
+                    critical = bcat(
+                        os.path.join(base, trip_point + "_temp"), fallback=None
+                    )
                 elif trip_type == 'high':
-                    high = cat(os.path.join(base, trip_point + "_temp"),
-                               fallback=None)
+                    high = bcat(
+                        os.path.join(base, trip_point + "_temp"), fallback=None
+                    )
 
                 if high is not None:
                     try:
@@ -1367,13 +1512,12 @@ def sensors_fans():
     basenames = sorted(set([x.split('_')[0] for x in basenames]))
     for base in basenames:
         try:
-            current = int(cat(base + '_input'))
+            current = int(bcat(base + '_input'))
         except (IOError, OSError) as err:
-            warnings.warn("ignoring %r" % err, RuntimeWarning)
+            debug(err)
             continue
-        unit_name = cat(os.path.join(os.path.dirname(base), 'name'),
-                        binary=False)
-        label = cat(base + '_label', fallback='', binary=False)
+        unit_name = cat(os.path.join(os.path.dirname(base), 'name')).strip()
+        label = cat(base + '_label', fallback='').strip()
         ret[unit_name].append(_common.sfan(label, current))
 
     return dict(ret)
@@ -1384,22 +1528,28 @@ def sensors_battery():
     Implementation note: it appears /sys/class/power_supply/BAT0/
     directory structure may vary and provide files with the same
     meaning but under different names, see:
-    https://github.com/giampaolo/psutil/issues/966
+    https://github.com/giampaolo/psutil/issues/966.
     """
     null = object()
 
-    def multi_cat(*paths):
+    def multi_bcat(*paths):
         """Attempt to read the content of multiple files which may
         not exist. If none of them exist return None.
         """
         for path in paths:
-            ret = cat(path, fallback=null)
+            ret = bcat(path, fallback=null)
             if ret != null:
-                return int(ret) if ret.isdigit() else ret
+                try:
+                    return int(ret)
+                except ValueError:
+                    return ret.strip()
         return None
 
-    bats = [x for x in os.listdir(POWER_SUPPLY_PATH) if x.startswith('BAT') or
-            'battery' in x.lower()]
+    bats = [
+        x
+        for x in os.listdir(POWER_SUPPLY_PATH)
+        if x.startswith('BAT') or 'battery' in x.lower()
+    ]
     if not bats:
         return None
     # Get the first available battery. Usually this is "BAT0", except
@@ -1408,16 +1558,10 @@ def sensors_battery():
     root = os.path.join(POWER_SUPPLY_PATH, sorted(bats)[0])
 
     # Base metrics.
-    energy_now = multi_cat(
-        root + "/energy_now",
-        root + "/charge_now")
-    power_now = multi_cat(
-        root + "/power_now",
-        root + "/current_now")
-    energy_full = multi_cat(
-        root + "/energy_full",
-        root + "/charge_full")
-    time_to_empty = multi_cat(root + "/time_to_empty_now")
+    energy_now = multi_bcat(root + "/energy_now", root + "/charge_now")
+    power_now = multi_bcat(root + "/power_now", root + "/current_now")
+    energy_full = multi_bcat(root + "/energy_full", root + "/charge_full")
+    time_to_empty = multi_bcat(root + "/time_to_empty_now")
 
     # Percent. If we have energy_full the percentage will be more
     # accurate compared to reading /capacity file (float vs. int).
@@ -1435,13 +1579,14 @@ def sensors_battery():
     # Note: AC0 is not always available and sometimes (e.g. CentOS7)
     # it's called "AC".
     power_plugged = None
-    online = multi_cat(
+    online = multi_bcat(
         os.path.join(POWER_SUPPLY_PATH, "AC0/online"),
-        os.path.join(POWER_SUPPLY_PATH, "AC/online"))
+        os.path.join(POWER_SUPPLY_PATH, "AC/online"),
+    )
     if online is not None:
         power_plugged = online == 1
     else:
-        status = cat(root + "/status", fallback="", binary=False).lower()
+        status = cat(root + "/status", fallback="").strip().lower()
         if status == "discharging":
             power_plugged = False
         elif status in ("charging", "full"):
@@ -1478,14 +1623,7 @@ def users():
     retlist = []
     rawlist = cext.users()
     for item in rawlist:
-        user, tty, hostname, tstamp, user_process, pid = item
-        # note: the underlying C function includes entries about
-        # system boot, run level and others.  We might want
-        # to use them in the future.
-        if not user_process:
-            continue
-        if hostname in (':0.0', ':0'):
-            hostname = 'localhost'
+        user, tty, hostname, tstamp, pid = item
         nt = _common.suser(user, tty or None, hostname, tstamp, pid)
         retlist.append(nt)
     return retlist
@@ -1501,8 +1639,7 @@ def boot_time():
                 ret = float(line.strip().split()[1])
                 BOOT_TIME = ret
                 return ret
-        raise RuntimeError(
-            "line 'btime' not found in %s" % path)
+        raise RuntimeError("line 'btime' not found in %s" % path)
 
 
 # =====================================================================
@@ -1563,7 +1700,7 @@ def ppid_map():
             pass
         else:
             rpar = data.rfind(b')')
-            dset = data[rpar + 2:].split()
+            dset = data[rpar + 2 :].split()
             ppid = int(dset[1])
             ret[pid] = ppid
     return ret
@@ -1573,6 +1710,7 @@ def wrap_exceptions(fun):
     """Decorator which translates bare OSError and IOError exceptions
     into NoSuchProcess and AccessDenied.
     """
+
     @functools.wraps(fun)
     def wrapper(self, *args, **kwargs):
         try:
@@ -1580,17 +1718,18 @@ def wrap_exceptions(fun):
         except PermissionError:
             raise AccessDenied(self.pid, self._name)
         except ProcessLookupError:
+            self._raise_if_zombie()
             raise NoSuchProcess(self.pid, self._name)
         except FileNotFoundError:
+            self._raise_if_zombie()
             if not os.path.exists("%s/%s" % (self._procfs_path, self.pid)):
                 raise NoSuchProcess(self.pid, self._name)
-            # Note: zombies will keep existing under /proc until they're
-            # gone so there's no way to distinguish them in here.
             raise
+
     return wrapper
 
 
-class Process(object):
+class Process:
     """Linux process implementation."""
 
     __slots__ = ["pid", "_name", "_ppid", "_procfs_path", "_cache"]
@@ -1601,7 +1740,27 @@ class Process(object):
         self._ppid = None
         self._procfs_path = get_procfs_path()
 
-    def _assert_alive(self):
+    def _is_zombie(self):
+        # Note: most of the times Linux is able to return info about the
+        # process even if it's a zombie, and /proc/{pid} will exist.
+        # There are some exceptions though, like exe(), cmdline() and
+        # memory_maps(). In these cases /proc/{pid}/{file} exists but
+        # it's empty. Instead of returning a "null" value we'll raise an
+        # exception.
+        try:
+            data = bcat("%s/%s/stat" % (self._procfs_path, self.pid))
+        except (IOError, OSError):
+            return False
+        else:
+            rpar = data.rfind(b')')
+            status = data[rpar + 2 : rpar + 3]
+            return status == b"Z"
+
+    def _raise_if_zombie(self):
+        if self._is_zombie():
+            raise ZombieProcess(self.pid, self._name, self._ppid)
+
+    def _raise_if_not_alive(self):
         """Raise NSP if the process disappeared on us."""
         # For those C function who do not raise NSP, possibly returning
         # incorrect or incomplete result.
@@ -1613,19 +1772,18 @@ class Process(object):
         """Parse /proc/{pid}/stat file and return a dict with various
         process info.
         Using "man proc" as a reference: where "man proc" refers to
-        position N always substract 3 (e.g ppid position 4 in
+        position N always subtract 3 (e.g ppid position 4 in
         'man proc' == position 1 in here).
         The return value is cached in case oneshot() ctx manager is
         in use.
         """
-        with open_binary("%s/%s/stat" % (self._procfs_path, self.pid)) as f:
-            data = f.read()
+        data = bcat("%s/%s/stat" % (self._procfs_path, self.pid))
         # Process name is between parentheses. It can contain spaces and
         # other parentheses. This is taken into account by looking for
-        # the first occurrence of "(" and the last occurence of ")".
+        # the first occurrence of "(" and the last occurrence of ")".
         rpar = data.rfind(b')')
-        name = data[data.find(b'(') + 1:rpar]
-        fields = data[rpar + 2:].split()
+        name = data[data.find(b'(') + 1 : rpar]
+        fields = data[rpar + 2 :].split()
 
         ret = {}
         ret['name'] = name
@@ -1655,8 +1813,7 @@ class Process(object):
     @wrap_exceptions
     @memoize_when_activated
     def _read_smaps_file(self):
-        with open_binary("%s/%s/smaps" % (self._procfs_path, self.pid),
-                         buffering=BIGFILE_BUFFERING) as f:
+        with open_binary("%s/%s/smaps" % (self._procfs_path, self.pid)) as f:
             return f.read().strip()
 
     def oneshot_enter(self):
@@ -1677,22 +1834,18 @@ class Process(object):
         # XXX - gets changed later and probably needs refactoring
         return name
 
+    @wrap_exceptions
     def exe(self):
         try:
             return readlink("%s/%s/exe" % (self._procfs_path, self.pid))
         except (FileNotFoundError, ProcessLookupError):
+            self._raise_if_zombie()
             # no such file error; might be raised also if the
             # path actually exists for system processes with
             # low pids (about 0-20)
             if os.path.lexists("%s/%s" % (self._procfs_path, self.pid)):
                 return ""
-            else:
-                if not pid_exists(self.pid):
-                    raise NoSuchProcess(self.pid, self._name)
-                else:
-                    raise ZombieProcess(self.pid, self._name, self._ppid)
-        except PermissionError:
-            raise AccessDenied(self.pid, self._name)
+            raise
 
     @wrap_exceptions
     def cmdline(self):
@@ -1700,6 +1853,7 @@ class Process(object):
             data = f.read()
         if not data:
             # may happen in case of zombie process
+            self._raise_if_zombie()
             return []
         # 'man proc' states that args are separated by null bytes '\0'
         # and last char is supposed to be a null byte. Nevertheless
@@ -1736,6 +1890,7 @@ class Process(object):
 
     # May not be available on old kernels.
     if os.path.exists('/proc/%s/io' % os.getpid()):
+
         @wrap_exceptions
         def io_counters(self):
             fname = "%s/%s/io" % (self._procfs_path, self.pid)
@@ -1764,8 +1919,10 @@ class Process(object):
                     fields[b'wchar'],  # write chars
                 )
             except KeyError as err:
-                raise ValueError("%r field was not found in %s; found fields "
-                                 "are %r" % (err[0], fname, fields))
+                raise ValueError(
+                    "%r field was not found in %s; found fields are %r"
+                    % (err.args[0], fname, fields)
+                )
 
     @wrap_exceptions
     def cpu_times(self):
@@ -1811,22 +1968,47 @@ class Process(object):
         # | dirty  | dirty pages (unused in Linux 2.6)   | dt   |      |
         #  ============================================================
         with open_binary("%s/%s/statm" % (self._procfs_path, self.pid)) as f:
-            vms, rss, shared, text, lib, data, dirty = \
-                [int(x) * PAGESIZE for x in f.readline().split()[:7]]
+            vms, rss, shared, text, lib, data, dirty = (
+                int(x) * PAGESIZE for x in f.readline().split()[:7]
+            )
         return pmem(rss, vms, shared, text, lib, data, dirty)
 
-    # /proc/pid/smaps does not exist on kernels < 2.6.14 or if
-    # CONFIG_MMU kernel configuration option is not enabled.
-    if HAS_SMAPS:
+    if HAS_PROC_SMAPS_ROLLUP or HAS_PROC_SMAPS:
+
+        def _parse_smaps_rollup(self):
+            # /proc/pid/smaps_rollup was added to Linux in 2017. Faster
+            # than /proc/pid/smaps. It reports higher PSS than */smaps
+            # (from 1k up to 200k higher; tested against all processes).
+            # IMPORTANT: /proc/pid/smaps_rollup is weird, because it
+            # raises ESRCH / ENOENT for many PIDs, even if they're alive
+            # (also as root). In that case we'll use /proc/pid/smaps as
+            # fallback, which is slower but has a +50% success rate
+            # compared to /proc/pid/smaps_rollup.
+            uss = pss = swap = 0
+            with open_binary(
+                "{}/{}/smaps_rollup".format(self._procfs_path, self.pid)
+            ) as f:
+                for line in f:
+                    if line.startswith(b"Private_"):
+                        # Private_Clean, Private_Dirty, Private_Hugetlb
+                        uss += int(line.split()[1]) * 1024
+                    elif line.startswith(b"Pss:"):
+                        pss = int(line.split()[1]) * 1024
+                    elif line.startswith(b"Swap:"):
+                        swap = int(line.split()[1]) * 1024
+            return (uss, pss, swap)
 
         @wrap_exceptions
-        def memory_full_info(
-                self,
-                # Gets Private_Clean, Private_Dirty, Private_Hugetlb.
-                _private_re=re.compile(br"\nPrivate.*:\s+(\d+)"),
-                _pss_re=re.compile(br"\nPss\:\s+(\d+)"),
-                _swap_re=re.compile(br"\nSwap\:\s+(\d+)")):
-            basic_mem = self.memory_info()
+        def _parse_smaps(
+            self,
+            # Gets Private_Clean, Private_Dirty, Private_Hugetlb.
+            _private_re=re.compile(br"\nPrivate.*:\s+(\d+)"),
+            _pss_re=re.compile(br"\nPss\:\s+(\d+)"),
+            _swap_re=re.compile(br"\nSwap\:\s+(\d+)"),
+        ):
+            # /proc/pid/smaps does not exist on kernels < 2.6.14 or if
+            # CONFIG_MMU kernel configuration option is not enabled.
+
             # Note: using 3 regexes is faster than reading the file
             # line by line.
             # XXX: on Python 3 the 2 regexes are 30% slower than on
@@ -1845,22 +2027,35 @@ class Process(object):
             uss = sum(map(int, _private_re.findall(smaps_data))) * 1024
             pss = sum(map(int, _pss_re.findall(smaps_data))) * 1024
             swap = sum(map(int, _swap_re.findall(smaps_data))) * 1024
+            return (uss, pss, swap)
+
+        @wrap_exceptions
+        def memory_full_info(self):
+            if HAS_PROC_SMAPS_ROLLUP:  # faster
+                try:
+                    uss, pss, swap = self._parse_smaps_rollup()
+                except (ProcessLookupError, FileNotFoundError):
+                    uss, pss, swap = self._parse_smaps()
+            else:
+                uss, pss, swap = self._parse_smaps()
+            basic_mem = self.memory_info()
             return pfullmem(*basic_mem + (uss, pss, swap))
 
     else:
         memory_full_info = memory_info
 
-    if HAS_SMAPS:
+    if HAS_PROC_SMAPS:
 
         @wrap_exceptions
         def memory_maps(self):
             """Return process's mapped memory regions as a list of named
             tuples. Fields are explained in 'man proc'; here is an updated
-            (Apr 2012) version: http://goo.gl/fmebo
+            (Apr 2012) version: http://goo.gl/fmebo.
 
             /proc/{PID}/smaps does not exist on kernels < 2.6.14 or if
             CONFIG_MMU kernel configuration option is not enabled.
             """
+
             def get_blocks(lines, current_block):
                 data = {}
                 for line in lines:
@@ -1877,13 +2072,17 @@ class Process(object):
                                 # see issue #369
                                 continue
                             else:
-                                raise ValueError("don't know how to inte"
-                                                 "rpret line %r" % line)
+                                raise ValueError(
+                                    "don't know how to interpret line %r"
+                                    % line
+                                )
                 yield (current_block.pop(), data)
 
             data = self._read_smaps_file()
-            # Note: smaps file can be empty for certain processes.
+            # Note: smaps file can be empty for certain processes or for
+            # zombies.
             if not data:
+                self._raise_if_zombie()
                 return []
             lines = data.split(b'\n')
             ls = []
@@ -1894,19 +2093,21 @@ class Process(object):
                 try:
                     addr, perms, offset, dev, inode, path = hfields
                 except ValueError:
-                    addr, perms, offset, dev, inode, path = \
-                        hfields + ['']
+                    addr, perms, offset, dev, inode, path = hfields + ['']
                 if not path:
                     path = '[anon]'
                 else:
                     if PY3:
                         path = decode(path)
                     path = path.strip()
-                    if (path.endswith(' (deleted)') and not
-                            path_exists_strict(path)):
+                    if path.endswith(' (deleted)') and not path_exists_strict(
+                        path
+                    ):
                         path = path[:-10]
                 ls.append((
-                    decode(addr), decode(perms), path,
+                    decode(addr),
+                    decode(perms),
+                    path,
                     data.get(b'Rss:', 0),
                     data.get(b'Size:', 0),
                     data.get(b'Pss:', 0),
@@ -1916,32 +2117,26 @@ class Process(object):
                     data.get(b'Private_Dirty:', 0),
                     data.get(b'Referenced:', 0),
                     data.get(b'Anonymous:', 0),
-                    data.get(b'Swap:', 0)
+                    data.get(b'Swap:', 0),
                 ))
             return ls
 
     @wrap_exceptions
     def cwd(self):
-        try:
-            return readlink("%s/%s/cwd" % (self._procfs_path, self.pid))
-        except (FileNotFoundError, ProcessLookupError):
-            # https://github.com/giampaolo/psutil/issues/986
-            if not pid_exists(self.pid):
-                raise NoSuchProcess(self.pid, self._name)
-            else:
-                raise ZombieProcess(self.pid, self._name, self._ppid)
+        return readlink("%s/%s/cwd" % (self._procfs_path, self.pid))
 
     @wrap_exceptions
-    def num_ctx_switches(self,
-                         _ctxsw_re=re.compile(br'ctxt_switches:\t(\d+)')):
+    def num_ctx_switches(
+        self, _ctxsw_re=re.compile(br'ctxt_switches:\t(\d+)')
+    ):
         data = self._read_status_file()
         ctxsw = _ctxsw_re.findall(data)
         if not ctxsw:
             raise NotImplementedError(
                 "'voluntary_ctxt_switches' and 'nonvoluntary_ctxt_switches'"
                 "lines were not found in %s/%s/status; the kernel is "
-                "probably older than 2.6.23" % (
-                    self._procfs_path, self.pid))
+                "probably older than 2.6.23" % (self._procfs_path, self.pid)
+            )
         else:
             return _common.pctxsw(int(ctxsw[0]), int(ctxsw[1]))
 
@@ -1961,24 +2156,27 @@ class Process(object):
         hit_enoent = False
         for thread_id in thread_ids:
             fname = "%s/%s/task/%s/stat" % (
-                self._procfs_path, self.pid, thread_id)
+                self._procfs_path,
+                self.pid,
+                thread_id,
+            )
             try:
                 with open_binary(fname) as f:
                     st = f.read().strip()
-            except FileNotFoundError:
-                # no such file or directory; it means thread
-                # disappeared on us
+            except (FileNotFoundError, ProcessLookupError):
+                # no such file or directory or no such process;
+                # it means thread disappeared on us
                 hit_enoent = True
                 continue
             # ignore the first two values ("pid (exe)")
-            st = st[st.find(b')') + 2:]
+            st = st[st.find(b')') + 2 :]
             values = st.split(b' ')
             utime = float(values[11]) / CLOCK_TICKS
             stime = float(values[12]) / CLOCK_TICKS
             ntuple = _common.pthread(int(thread_id), utime, stime)
             retlist.append(ntuple)
         if hit_enoent:
-            self._assert_alive()
+            self._raise_if_not_alive()
         return retlist
 
     @wrap_exceptions
@@ -2002,7 +2200,8 @@ class Process(object):
             return cext.proc_cpu_affinity_get(self.pid)
 
         def _get_eligible_cpus(
-                self, _re=re.compile(br"Cpus_allowed_list:\t(\d+)-(\d+)")):
+            self, _re=re.compile(br"Cpus_allowed_list:\t(\d+)-(\d+)")
+        ):
             # See: https://github.com/giampaolo/psutil/issues/956
             data = self._read_status_file()
             match = _re.findall(data)
@@ -2022,12 +2221,14 @@ class Process(object):
                     for cpu in cpus:
                         if cpu not in all_cpus:
                             raise ValueError(
-                                "invalid CPU number %r; choose between %s" % (
-                                    cpu, eligible_cpus))
+                                "invalid CPU number %r; choose between %s"
+                                % (cpu, eligible_cpus)
+                            )
                         if cpu not in eligible_cpus:
                             raise ValueError(
                                 "CPU number %r is not eligible; choose "
-                                "between %s" % (cpu, eligible_cpus))
+                                "between %s" % (cpu, eligible_cpus)
+                            )
                 raise
 
     # only starting from kernel 2.6.13
@@ -2047,7 +2248,8 @@ class Process(object):
             if value and ioclass in (IOPRIO_CLASS_IDLE, IOPRIO_CLASS_NONE):
                 raise ValueError("%r ioclass accepts no value" % ioclass)
             if value < 0 or value > 7:
-                raise ValueError("value not in 0-7 range")
+                msg = "value not in 0-7 range"
+                raise ValueError(msg)
             return cext.proc_ioprio_set(self.pid, ioclass, value)
 
     if prlimit is not None:
@@ -2058,7 +2260,8 @@ class Process(object):
             # we don't want that. We should never get here though as
             # PID 0 is not supported on Linux.
             if self.pid == 0:
-                raise ValueError("can't use prlimit() against PID 0 process")
+                msg = "can't use prlimit() against PID 0 process"
+                raise ValueError(msg)
             try:
                 if limits is None:
                     # get
@@ -2066,17 +2269,18 @@ class Process(object):
                 else:
                     # set
                     if len(limits) != 2:
-                        raise ValueError(
-                            "second argument must be a (soft, hard) tuple, "
-                            "got %s" % repr(limits))
+                        msg = (
+                            "second argument must be a (soft, hard) "
+                            + "tuple, got %s" % repr(limits)
+                        )
+                        raise ValueError(msg)
                     prlimit(self.pid, resource_, limits)
             except OSError as err:
-                if err.errno == errno.ENOSYS and pid_exists(self.pid):
+                if err.errno == errno.ENOSYS:
                     # I saw this happening on Travis:
                     # https://travis-ci.org/giampaolo/psutil/jobs/51368273
-                    raise ZombieProcess(self.pid, self._name, self._ppid)
-                else:
-                    raise
+                    self._raise_if_zombie()
+                raise
 
     @wrap_exceptions
     def status(self):
@@ -2103,6 +2307,10 @@ class Process(object):
                 if err.errno == errno.EINVAL:
                     # not a link
                     continue
+                if err.errno == errno.ENAMETOOLONG:
+                    # file name too long
+                    debug(err)
+                    continue
                 raise
             else:
                 # If path is not an absolute there's no way to tell
@@ -2112,28 +2320,32 @@ class Process(object):
                 if path.startswith('/') and isfile_strict(path):
                     # Get file position and flags.
                     file = "%s/%s/fdinfo/%s" % (
-                        self._procfs_path, self.pid, fd)
+                        self._procfs_path,
+                        self.pid,
+                        fd,
+                    )
                     try:
                         with open_binary(file) as f:
                             pos = int(f.readline().split()[1])
                             flags = int(f.readline().split()[1], 8)
-                    except FileNotFoundError:
+                    except (FileNotFoundError, ProcessLookupError):
                         # fd gone in the meantime; process may
                         # still be alive
                         hit_enoent = True
                     else:
                         mode = file_flags_to_mode(flags)
                         ntuple = popenfile(
-                            path, int(fd), int(pos), mode, flags)
+                            path, int(fd), int(pos), mode, flags
+                        )
                         retlist.append(ntuple)
         if hit_enoent:
-            self._assert_alive()
+            self._raise_if_not_alive()
         return retlist
 
     @wrap_exceptions
     def connections(self, kind='inet'):
         ret = _connections.retrieve(kind, self.pid)
-        self._assert_alive()
+        self._raise_if_not_alive()
         return ret
 
     @wrap_exceptions
diff --git a/contrib/python/psutil/py3/psutil/_psosx.py b/contrib/python/psutil/py3/psutil/_psosx.py
index c7770d6591..673ac0db75 100644
--- a/contrib/python/psutil/py3/psutil/_psosx.py
+++ b/contrib/python/psutil/py3/psutil/_psosx.py
@@ -4,7 +4,6 @@
 
 """macOS platform implementation."""
 
-import contextlib
 import errno
 import functools
 import os
@@ -15,14 +14,14 @@ from . import _psposix
 from . import _psutil_osx as cext
 from . import _psutil_posix as cext_posix
 from ._common import AccessDenied
+from ._common import NoSuchProcess
+from ._common import ZombieProcess
 from ._common import conn_tmap
 from ._common import conn_to_ntuple
 from ._common import isfile_strict
 from ._common import memoize_when_activated
-from ._common import NoSuchProcess
 from ._common import parse_environ_block
 from ._common import usage_percent
-from ._common import ZombieProcess
 from ._compat import PermissionError
 from ._compat import ProcessLookupError
 
@@ -92,6 +91,7 @@ pidtaskinfo_map = dict(
 # =====================================================================
 
 
+# fmt: off
 # psutil.cpu_times()
 scputimes = namedtuple('scputimes', ['user', 'nice', 'system', 'idle'])
 # psutil.virtual_memory()
@@ -102,6 +102,7 @@ svmem = namedtuple(
 pmem = namedtuple('pmem', ['rss', 'vms', 'pfaults', 'pageins'])
 # psutil.Process.memory_full_info()
 pfullmem = namedtuple('pfullmem', pmem._fields + ('uss', ))
+# fmt: on
 
 
 # =====================================================================
@@ -122,8 +123,7 @@ def virtual_memory():
     # cmdline utility.
     free -= speculative
     percent = usage_percent((total - avail), total, round_=1)
-    return svmem(total, avail, percent, used, free,
-                 active, inactive, wired)
+    return svmem(total, avail, percent, used, free, active, inactive, wired)
 
 
 def swap_memory():
@@ -145,7 +145,7 @@ def cpu_times():
 
 
 def per_cpu_times():
-    """Return system CPU times as a named tuple"""
+    """Return system CPU times as a named tuple."""
     ret = []
     for cpu_t in cext.per_cpu_times():
         user, nice, system, idle = cpu_t
@@ -159,23 +159,25 @@ def cpu_count_logical():
     return cext.cpu_count_logical()
 
 
-def cpu_count_physical():
-    """Return the number of physical CPUs in the system."""
-    return cext.cpu_count_phys()
+def cpu_count_cores():
+    """Return the number of CPU cores in the system."""
+    return cext.cpu_count_cores()
 
 
 def cpu_stats():
-    ctx_switches, interrupts, soft_interrupts, syscalls, traps = \
+    ctx_switches, interrupts, soft_interrupts, syscalls, traps = (
         cext.cpu_stats()
+    )
     return _common.scpustats(
-        ctx_switches, interrupts, soft_interrupts, syscalls)
+        ctx_switches, interrupts, soft_interrupts, syscalls
+    )
 
 
 def cpu_freq():
     """Return CPU frequency.
     On macOS per-cpu frequency is not supported.
     Also, the returned frequency never changes, see:
-    https://arstechnica.com/civis/viewtopic.php?f=19&t=465002
+    https://arstechnica.com/civis/viewtopic.php?f=19&t=465002.
     """
     curr, min_, max_ = cext.cpu_freq()
     return [_common.scpufreq(curr, min_, max_)]
@@ -202,8 +204,9 @@ def disk_partitions(all=False):
             if not os.path.isabs(device) or not os.path.exists(device):
                 continue
         maxfile = maxpath = None  # set later
-        ntuple = _common.sdiskpart(device, mountpoint, fstype, opts,
-                                   maxfile, maxpath)
+        ntuple = _common.sdiskpart(
+            device, mountpoint, fstype, opts, maxfile, maxpath
+        )
         retlist.append(ntuple)
     return retlist
 
@@ -264,7 +267,7 @@ def net_if_stats():
     for name in names:
         try:
             mtu = cext_posix.net_if_mtu(name)
-            isup = cext_posix.net_if_is_running(name)
+            flags = cext_posix.net_if_flags(name)
             duplex, speed = cext_posix.net_if_duplex_speed(name)
         except OSError as err:
             # https://github.com/giampaolo/psutil/issues/1279
@@ -273,7 +276,11 @@ def net_if_stats():
         else:
             if hasattr(_common, 'NicDuplex'):
                 duplex = _common.NicDuplex(duplex)
-            ret[name] = _common.snicstats(isup, duplex, speed, mtu)
+            output_flags = ','.join(flags)
+            isup = 'running' in flags
+            ret[name] = _common.snicstats(
+                isup, duplex, speed, mtu, output_flags
+            )
     return ret
 
 
@@ -330,7 +337,7 @@ def is_zombie(pid):
     try:
         st = cext.proc_kinfo_oneshot(pid)[kinfo_proc_map['status']]
         return st == cext.SZOMB
-    except Exception:
+    except OSError:
         return False
 
 
@@ -338,6 +345,7 @@ def wrap_exceptions(fun):
     """Decorator which translates bare OSError exceptions into
     NoSuchProcess and AccessDenied.
     """
+
     @functools.wraps(fun)
     def wrapper(self, *args, **kwargs):
         try:
@@ -349,38 +357,11 @@ def wrap_exceptions(fun):
                 raise NoSuchProcess(self.pid, self._name)
         except PermissionError:
             raise AccessDenied(self.pid, self._name)
-        except cext.ZombieProcessError:
-            raise ZombieProcess(self.pid, self._name, self._ppid)
-    return wrapper
-
 
-@contextlib.contextmanager
-def catch_zombie(proc):
-    """There are some poor C APIs which incorrectly raise ESRCH when
-    the process is still alive or it's a zombie, or even RuntimeError
-    (those who don't set errno). This is here in order to solve:
-    https://github.com/giampaolo/psutil/issues/1044
-    """
-    try:
-        yield
-    except (OSError, RuntimeError) as err:
-        if isinstance(err, RuntimeError) or err.errno == errno.ESRCH:
-            try:
-                # status() is not supposed to lie and correctly detect
-                # zombies so if it raises ESRCH it's true.
-                status = proc.status()
-            except NoSuchProcess:
-                raise err
-            else:
-                if status == _common.STATUS_ZOMBIE:
-                    raise ZombieProcess(proc.pid, proc._name, proc._ppid)
-                else:
-                    raise AccessDenied(proc.pid, proc._name)
-        else:
-            raise
+    return wrapper
 
 
-class Process(object):
+class Process:
     """Wrapper class around underlying C implementation."""
 
     __slots__ = ["pid", "_name", "_ppid", "_cache"]
@@ -402,8 +383,7 @@ class Process(object):
     @memoize_when_activated
     def _get_pidtaskinfo(self):
         # Note: should work for PIDs owned by user only.
-        with catch_zombie(self):
-            ret = cext.proc_pidtaskinfo_oneshot(self.pid)
+        ret = cext.proc_pidtaskinfo_oneshot(self.pid)
         assert len(ret) == len(pidtaskinfo_map)
         return ret
 
@@ -422,18 +402,15 @@ class Process(object):
 
     @wrap_exceptions
     def exe(self):
-        with catch_zombie(self):
-            return cext.proc_exe(self.pid)
+        return cext.proc_exe(self.pid)
 
     @wrap_exceptions
     def cmdline(self):
-        with catch_zombie(self):
-            return cext.proc_cmdline(self.pid)
+        return cext.proc_cmdline(self.pid)
 
     @wrap_exceptions
     def environ(self):
-        with catch_zombie(self):
-            return parse_environ_block(cext.proc_environ(self.pid))
+        return parse_environ_block(cext.proc_environ(self.pid))
 
     @wrap_exceptions
     def ppid(self):
@@ -442,8 +419,7 @@ class Process(object):
 
     @wrap_exceptions
     def cwd(self):
-        with catch_zombie(self):
-            return cext.proc_cwd(self.pid)
+        return cext.proc_cwd(self.pid)
 
     @wrap_exceptions
     def uids(self):
@@ -451,7 +427,8 @@ class Process(object):
         return _common.puids(
             rawtuple[kinfo_proc_map['ruid']],
             rawtuple[kinfo_proc_map['euid']],
-            rawtuple[kinfo_proc_map['suid']])
+            rawtuple[kinfo_proc_map['suid']],
+        )
 
     @wrap_exceptions
     def gids(self):
@@ -459,7 +436,8 @@ class Process(object):
         return _common.puids(
             rawtuple[kinfo_proc_map['rgid']],
             rawtuple[kinfo_proc_map['egid']],
-            rawtuple[kinfo_proc_map['sgid']])
+            rawtuple[kinfo_proc_map['sgid']],
+        )
 
     @wrap_exceptions
     def terminal(self):
@@ -484,7 +462,7 @@ class Process(object):
     def memory_full_info(self):
         basic_mem = self.memory_info()
         uss = cext.proc_memory_uss(self.pid)
-        return pfullmem(*basic_mem + (uss, ))
+        return pfullmem(*basic_mem + (uss,))
 
     @wrap_exceptions
     def cpu_times(self):
@@ -493,7 +471,9 @@ class Process(object):
             rawtuple[pidtaskinfo_map['cpuutime']],
             rawtuple[pidtaskinfo_map['cpustime']],
             # children user / system times are not retrievable (set to 0)
-            0.0, 0.0)
+            0.0,
+            0.0,
+        )
 
     @wrap_exceptions
     def create_time(self):
@@ -516,8 +496,7 @@ class Process(object):
         if self.pid == 0:
             return []
         files = []
-        with catch_zombie(self):
-            rawlist = cext.proc_open_files(self.pid)
+        rawlist = cext.proc_open_files(self.pid)
         for path, fd in rawlist:
             if isfile_strict(path):
                 ntuple = _common.popenfile(path, fd)
@@ -527,16 +506,18 @@ class Process(object):
     @wrap_exceptions
     def connections(self, kind='inet'):
         if kind not in conn_tmap:
-            raise ValueError("invalid %r kind argument; choose between %s"
-                             % (kind, ', '.join([repr(x) for x in conn_tmap])))
+            raise ValueError(
+                "invalid %r kind argument; choose between %s"
+                % (kind, ', '.join([repr(x) for x in conn_tmap]))
+            )
         families, types = conn_tmap[kind]
-        with catch_zombie(self):
-            rawlist = cext.proc_connections(self.pid, families, types)
+        rawlist = cext.proc_connections(self.pid, families, types)
         ret = []
         for item in rawlist:
             fd, fam, type, laddr, raddr, status = item
-            nt = conn_to_ntuple(fd, fam, type, laddr, raddr, status,
-                                TCP_STATUSES)
+            nt = conn_to_ntuple(
+                fd, fam, type, laddr, raddr, status, TCP_STATUSES
+            )
             ret.append(nt)
         return ret
 
@@ -544,8 +525,7 @@ class Process(object):
     def num_fds(self):
         if self.pid == 0:
             return 0
-        with catch_zombie(self):
-            return cext.proc_num_fds(self.pid)
+        return cext.proc_num_fds(self.pid)
 
     @wrap_exceptions
     def wait(self, timeout=None):
@@ -553,13 +533,11 @@ class Process(object):
 
     @wrap_exceptions
     def nice_get(self):
-        with catch_zombie(self):
-            return cext_posix.getpriority(self.pid)
+        return cext_posix.getpriority(self.pid)
 
     @wrap_exceptions
     def nice_set(self, value):
-        with catch_zombie(self):
-            return cext_posix.setpriority(self.pid, value)
+        return cext_posix.setpriority(self.pid, value)
 
     @wrap_exceptions
     def status(self):
diff --git a/contrib/python/psutil/py3/psutil/_psposix.py b/contrib/python/psutil/py3/psutil/_psposix.py
index 706dab9ae8..42bdfa7ef6 100644
--- a/contrib/python/psutil/py3/psutil/_psposix.py
+++ b/contrib/python/psutil/py3/psutil/_psposix.py
@@ -10,19 +10,25 @@ import signal
 import sys
 import time
 
+from ._common import MACOS
+from ._common import TimeoutExpired
 from ._common import memoize
 from ._common import sdiskusage
-from ._common import TimeoutExpired
 from ._common import usage_percent
+from ._compat import PY3
 from ._compat import ChildProcessError
 from ._compat import FileNotFoundError
 from ._compat import InterruptedError
 from ._compat import PermissionError
 from ._compat import ProcessLookupError
-from ._compat import PY3
 from ._compat import unicode
 
-if sys.version_info >= (3, 4):
+
+if MACOS:
+    from . import _psutil_osx
+
+
+if PY3:
     import enum
 else:
     enum = None
@@ -57,7 +63,8 @@ def pid_exists(pid):
 # https://bugs.python.org/issue21076
 if enum is not None and hasattr(signal, "Signals"):
     Negsignal = enum.IntEnum(
-        'Negsignal', dict([(x.name, -x.value) for x in signal.Signals]))
+        'Negsignal', dict([(x.name, -x.value) for x in signal.Signals])
+    )
 
     def negsig_to_enum(num):
         """Convert a negative signal value to an enum."""
@@ -65,17 +72,23 @@ if enum is not None and hasattr(signal, "Signals"):
             return Negsignal(num)
         except ValueError:
             return num
+
 else:  # pragma: no cover
+
     def negsig_to_enum(num):
         return num
 
 
-def wait_pid(pid, timeout=None, proc_name=None,
-             _waitpid=os.waitpid,
-             _timer=getattr(time, 'monotonic', time.time),
-             _min=min,
-             _sleep=time.sleep,
-             _pid_exists=pid_exists):
+def wait_pid(
+    pid,
+    timeout=None,
+    proc_name=None,
+    _waitpid=os.waitpid,
+    _timer=getattr(time, 'monotonic', time.time),  # noqa: B008
+    _min=min,
+    _sleep=time.sleep,
+    _pid_exists=pid_exists,
+):
     """Wait for a process PID to terminate.
 
     If the process terminated normally by calling exit(3) or _exit(2),
@@ -94,7 +107,9 @@ def wait_pid(pid, timeout=None, proc_name=None,
     timeout=0 is also possible (either return immediately or raise).
     """
     if pid <= 0:
-        raise ValueError("can't wait for PID 0")  # see "man waitpid"
+        # see "man waitpid"
+        msg = "can't wait for PID 0"
+        raise ValueError(msg)
     interval = 0.0001
     flags = 0
     if timeout is not None:
@@ -130,7 +145,8 @@ def wait_pid(pid, timeout=None, proc_name=None,
                 # WNOHANG flag was used and PID is still running.
                 interval = sleep(interval)
                 continue
-            elif os.WIFEXITED(status):
+
+            if os.WIFEXITED(status):
                 # Process terminated normally by calling exit(3) or _exit(2),
                 # or by returning from main(). The return value is the
                 # positive integer passed to *exit().
@@ -185,13 +201,16 @@ def disk_usage(path):
 
     # Total space which is only available to root (unless changed
     # at system level).
-    total = (st.f_blocks * st.f_frsize)
+    total = st.f_blocks * st.f_frsize
     # Remaining free space usable by root.
-    avail_to_root = (st.f_bfree * st.f_frsize)
+    avail_to_root = st.f_bfree * st.f_frsize
     # Remaining free space usable by user.
-    avail_to_user = (st.f_bavail * st.f_frsize)
+    avail_to_user = st.f_bavail * st.f_frsize
     # Total space being used in general.
-    used = (total - avail_to_root)
+    used = total - avail_to_root
+    if MACOS:
+        # see: https://github.com/giampaolo/psutil/pull/2152
+        used = _psutil_osx.disk_usage_used(path, used)
     # Total space which is available to user (same as 'total' but
     # for the user).
     total_user = used + avail_to_user
@@ -204,13 +223,14 @@ def disk_usage(path):
     # reserved blocks that we are currently not considering:
     # https://github.com/giampaolo/psutil/issues/829#issuecomment-223750462
     return sdiskusage(
-        total=total, used=used, free=avail_to_user, percent=usage_percent_user)
+        total=total, used=used, free=avail_to_user, percent=usage_percent_user
+    )
 
 
 @memoize
 def get_terminal_map():
     """Get a map of device-id -> path as a dict.
-    Used by Process.terminal()
+    Used by Process.terminal().
     """
     ret = {}
     ls = glob.glob('/dev/tty*') + glob.glob('/dev/pts/*')
diff --git a/contrib/python/psutil/py3/psutil/_pssunos.py b/contrib/python/psutil/py3/psutil/_pssunos.py
index 5618bd4460..dddbece1f3 100644
--- a/contrib/python/psutil/py3/psutil/_pssunos.py
+++ b/contrib/python/psutil/py3/psutil/_pssunos.py
@@ -17,22 +17,22 @@ from . import _common
 from . import _psposix
 from . import _psutil_posix as cext_posix
 from . import _psutil_sunos as cext
-from ._common import AccessDenied
 from ._common import AF_INET6
+from ._common import AccessDenied
+from ._common import NoSuchProcess
+from ._common import ZombieProcess
 from ._common import debug
 from ._common import get_procfs_path
 from ._common import isfile_strict
 from ._common import memoize_when_activated
-from ._common import NoSuchProcess
 from ._common import sockfam_to_enum
 from ._common import socktype_to_enum
 from ._common import usage_percent
-from ._common import ZombieProcess
-from ._compat import b
+from ._compat import PY3
 from ._compat import FileNotFoundError
 from ._compat import PermissionError
 from ._compat import ProcessLookupError
-from ._compat import PY3
+from ._compat import b
 
 
 __extra__all__ = ["CONN_IDLE", "CONN_BOUND", "PROCFS_PATH"]
@@ -89,7 +89,8 @@ proc_info_map = dict(
     uid=8,
     euid=9,
     gid=10,
-    egid=11)
+    egid=11,
+)
 
 
 # =====================================================================
@@ -100,19 +101,22 @@ proc_info_map = dict(
 # psutil.cpu_times()
 scputimes = namedtuple('scputimes', ['user', 'system', 'idle', 'iowait'])
 # psutil.cpu_times(percpu=True)
-pcputimes = namedtuple('pcputimes',
-                       ['user', 'system', 'children_user', 'children_system'])
+pcputimes = namedtuple(
+    'pcputimes', ['user', 'system', 'children_user', 'children_system']
+)
 # psutil.virtual_memory()
 svmem = namedtuple('svmem', ['total', 'available', 'percent', 'used', 'free'])
 # psutil.Process.memory_info()
 pmem = namedtuple('pmem', ['rss', 'vms'])
 pfullmem = pmem
 # psutil.Process.memory_maps(grouped=True)
-pmmap_grouped = namedtuple('pmmap_grouped',
-                           ['path', 'rss', 'anonymous', 'locked'])
+pmmap_grouped = namedtuple(
+    'pmmap_grouped', ['path', 'rss', 'anonymous', 'locked']
+)
 # psutil.Process.memory_maps(grouped=False)
 pmmap_ext = namedtuple(
-    'pmmap_ext', 'addr perms ' + ' '.join(pmmap_grouped._fields))
+    'pmmap_ext', 'addr perms ' + ' '.join(pmmap_grouped._fields)
+)
 
 
 # =====================================================================
@@ -140,10 +144,16 @@ def swap_memory():
     #     usr/src/cmd/swap/swap.c
     # ...nevertheless I can't manage to obtain the same numbers as 'swap'
     # cmdline utility, so let's parse its output (sigh!)
-    p = subprocess.Popen(['/usr/bin/env', 'PATH=/usr/sbin:/sbin:%s' %
-                          os.environ['PATH'], 'swap', '-l'],
-                         stdout=subprocess.PIPE)
-    stdout, stderr = p.communicate()
+    p = subprocess.Popen(
+        [
+            '/usr/bin/env',
+            'PATH=/usr/sbin:/sbin:%s' % os.environ['PATH'],
+            'swap',
+            '-l',
+        ],
+        stdout=subprocess.PIPE,
+    )
+    stdout, _ = p.communicate()
     if PY3:
         stdout = stdout.decode(sys.stdout.encoding)
     if p.returncode != 0:
@@ -151,17 +161,19 @@ def swap_memory():
 
     lines = stdout.strip().split('\n')[1:]
     if not lines:
-        raise RuntimeError('no swap device(s) configured')
+        msg = 'no swap device(s) configured'
+        raise RuntimeError(msg)
     total = free = 0
     for line in lines:
         line = line.split()
-        t, f = line[3:4]
+        t, f = line[3:5]
         total += int(int(t) * 512)
         free += int(int(f) * 512)
     used = total - free
     percent = usage_percent(used, total, round_=1)
-    return _common.sswap(total, used, free, percent,
-                         sin * PAGE_SIZE, sout * PAGE_SIZE)
+    return _common.sswap(
+        total, used, free, percent, sin * PAGE_SIZE, sout * PAGE_SIZE
+    )
 
 
 # =====================================================================
@@ -170,13 +182,13 @@ def swap_memory():
 
 
 def cpu_times():
-    """Return system-wide CPU times as a named tuple"""
+    """Return system-wide CPU times as a named tuple."""
     ret = cext.per_cpu_times()
     return scputimes(*[sum(x) for x in zip(*ret)])
 
 
 def per_cpu_times():
-    """Return system per-CPU times as a list of named tuples"""
+    """Return system per-CPU times as a list of named tuples."""
     ret = cext.per_cpu_times()
     return [scputimes(*x) for x in ret]
 
@@ -190,17 +202,18 @@ def cpu_count_logical():
         return None
 
 
-def cpu_count_physical():
-    """Return the number of physical CPUs in the system."""
-    return cext.cpu_count_phys()
+def cpu_count_cores():
+    """Return the number of CPU cores in the system."""
+    return cext.cpu_count_cores()
 
 
 def cpu_stats():
     """Return various CPU stats as a named tuple."""
     ctx_switches, interrupts, syscalls, traps = cext.cpu_stats()
     soft_interrupts = 0
-    return _common.scpustats(ctx_switches, interrupts, soft_interrupts,
-                             syscalls)
+    return _common.scpustats(
+        ctx_switches, interrupts, soft_interrupts, syscalls
+    )
 
 
 # =====================================================================
@@ -231,11 +244,12 @@ def disk_partitions(all=False):
                     continue
             except OSError as err:
                 # https://github.com/giampaolo/psutil/issues/1674
-                debug("skipping %r: %r" % (mountpoint, err))
+                debug("skipping %r: %s" % (mountpoint, err))
                 continue
         maxfile = maxpath = None  # set later
-        ntuple = _common.sdiskpart(device, mountpoint, fstype, opts,
-                                   maxfile, maxpath)
+        ntuple = _common.sdiskpart(
+            device, mountpoint, fstype, opts, maxfile, maxpath
+        )
         retlist.append(ntuple)
     return retlist
 
@@ -258,8 +272,10 @@ def net_connections(kind, _pid=-1):
     if _pid == -1:
         cmap.pop('unix', 0)
     if kind not in cmap:
-        raise ValueError("invalid %r kind argument; choose between %s"
-                         % (kind, ', '.join([repr(x) for x in cmap])))
+        raise ValueError(
+            "invalid %r kind argument; choose between %s"
+            % (kind, ', '.join([repr(x) for x in cmap]))
+        )
     families, types = _common.conn_tmap[kind]
     rawlist = cext.net_connections(_pid)
     ret = set()
@@ -293,7 +309,7 @@ def net_if_stats():
         isup, duplex, speed, mtu = items
         if hasattr(_common, 'NicDuplex'):
             duplex = _common.NicDuplex(duplex)
-        ret[name] = _common.snicstats(isup, duplex, speed, mtu)
+        ret[name] = _common.snicstats(isup, duplex, speed, mtu, '')
     return ret
 
 
@@ -345,6 +361,7 @@ def wrap_exceptions(fun):
     """Call callable into a try/except clause and translate ENOENT,
     EACCES and EPERM in NoSuchProcess or AccessDenied exceptions.
     """
+
     @functools.wraps(fun)
     def wrapper(self, *args, **kwargs):
         try:
@@ -366,10 +383,11 @@ def wrap_exceptions(fun):
                 else:
                     raise
             raise
+
     return wrapper
 
 
-class Process(object):
+class Process:
     """Wrapper class around underlying C implementation."""
 
     __slots__ = ["pid", "_name", "_ppid", "_procfs_path", "_cache"]
@@ -404,8 +422,9 @@ class Process(object):
     @wrap_exceptions
     @memoize_when_activated
     def _proc_basic_info(self):
-        if self.pid == 0 and not \
-                os.path.exists('%s/%s/psinfo' % (self._procfs_path, self.pid)):
+        if self.pid == 0 and not os.path.exists(
+            '%s/%s/psinfo' % (self._procfs_path, self.pid)
+        ):
             raise AccessDenied(self.pid)
         ret = cext.proc_basic_info(self.pid, self._procfs_path)
         assert len(ret) == len(proc_info_map)
@@ -425,9 +444,10 @@ class Process(object):
     def exe(self):
         try:
             return os.readlink(
-                "%s/%s/path/a.out" % (self._procfs_path, self.pid))
+                "%s/%s/path/a.out" % (self._procfs_path, self.pid)
+            )
         except OSError:
-            pass    # continue and guess the exe name from the cmdline
+            pass  # continue and guess the exe name from the cmdline
         # Will be guessed later from cmdline but we want to explicitly
         # invoke cmdline here in order to get an AccessDenied
         # exception if the user has not enough privileges.
@@ -518,13 +538,13 @@ class Process(object):
     def terminal(self):
         procfs_path = self._procfs_path
         hit_enoent = False
-        tty = wrap_exceptions(
-            self._proc_basic_info()[proc_info_map['ttynr']])
+        tty = wrap_exceptions(self._proc_basic_info()[proc_info_map['ttynr']])
         if tty != cext.PRNODEV:
             for x in (0, 1, 2, 255):
                 try:
                     return os.readlink(
-                        '%s/%d/path/%d' % (procfs_path, self.pid, x))
+                        '%s/%d/path/%d' % (procfs_path, self.pid, x)
+                    )
                 except FileNotFoundError:
                     hit_enoent = True
                     continue
@@ -542,7 +562,7 @@ class Process(object):
             return os.readlink("%s/%s/path/cwd" % (procfs_path, self.pid))
         except FileNotFoundError:
             os.stat("%s/%s" % (procfs_path, self.pid))  # raise NSP or AD
-            return None
+            return ""
 
     @wrap_exceptions
     def memory_info(self):
@@ -569,7 +589,8 @@ class Process(object):
             tid = int(tid)
             try:
                 utime, stime = cext.query_process_thread(
-                    self.pid, tid, procfs_path)
+                    self.pid, tid, procfs_path
+                )
             except EnvironmentError as err:
                 if err.errno == errno.EOVERFLOW and not IS_64_BIT:
                     # We may get here if we attempt to query a 64bit process
@@ -617,13 +638,15 @@ class Process(object):
         """Get UNIX sockets used by process by parsing 'pfiles' output."""
         # TODO: rewrite this in C (...but the damn netstat source code
         # does not include this part! Argh!!)
-        cmd = "pfiles %s" % pid
-        p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,
-                             stderr=subprocess.PIPE)
+        cmd = ["pfiles", str(pid)]
+        p = subprocess.Popen(
+            cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE
+        )
         stdout, stderr = p.communicate()
         if PY3:
-            stdout, stderr = [x.decode(sys.stdout.encoding)
-                              for x in (stdout, stderr)]
+            stdout, stderr = (
+                x.decode(sys.stdout.encoding) for x in (stdout, stderr)
+            )
         if p.returncode != 0:
             if 'permission denied' in stderr.lower():
                 raise AccessDenied(self.pid, self._name)
@@ -659,8 +682,10 @@ class Process(object):
 
         # UNIX sockets
         if kind in ('all', 'unix'):
-            ret.extend([_common.pconn(*conn) for conn in
-                        self._get_unix_sockets(self.pid)])
+            ret.extend([
+                _common.pconn(*conn)
+                for conn in self._get_unix_sockets(self.pid)
+            ])
         return ret
 
     nt_mmap_grouped = namedtuple('mmap', 'path rss anon locked')
@@ -669,8 +694,10 @@ class Process(object):
     @wrap_exceptions
     def memory_maps(self):
         def toaddr(start, end):
-            return '%s-%s' % (hex(start)[2:].strip('L'),
-                              hex(end)[2:].strip('L'))
+            return '%s-%s' % (
+                hex(start)[2:].strip('L'),
+                hex(end)[2:].strip('L'),
+            )
 
         procfs_path = self._procfs_path
         retlist = []
@@ -695,7 +722,8 @@ class Process(object):
             if not name.startswith('['):
                 try:
                     name = os.readlink(
-                        '%s/%s/path/%s' % (procfs_path, self.pid, name))
+                        '%s/%s/path/%s' % (procfs_path, self.pid, name)
+                    )
                 except OSError as err:
                     if err.errno == errno.ENOENT:
                         # sometimes the link may not be resolved by
@@ -720,7 +748,8 @@ class Process(object):
     @wrap_exceptions
     def num_ctx_switches(self):
         return _common.pctxsw(
-            *cext.proc_num_ctx_switches(self.pid, self._procfs_path))
+            *cext.proc_num_ctx_switches(self.pid, self._procfs_path)
+        )
 
     @wrap_exceptions
     def wait(self, timeout=None):
diff --git a/contrib/python/psutil/py3/psutil/_psutil_common.c b/contrib/python/psutil/py3/psutil/_psutil_common.c
index f371167f3e..76b197917b 100644
--- a/contrib/python/psutil/py3/psutil/_psutil_common.c
+++ b/contrib/python/psutil/py3/psutil/_psutil_common.c
@@ -15,15 +15,13 @@
 // ====================================================================
 
 int PSUTIL_DEBUG = 0;
-int PSUTIL_TESTING = 0;
-// PSUTIL_CONN_NONE
 
 
 // ====================================================================
 // --- Backward compatibility with missing Python.h APIs
 // ====================================================================
 
-// PyPy on Windows
+// PyPy on Windows. Missing APIs added in PyPy 7.3.14.
 #if defined(PSUTIL_WINDOWS) && defined(PYPY_VERSION)
 #if !defined(PyErr_SetFromWindowsErrWithFilename)
 PyObject *
@@ -61,6 +59,18 @@ error:
 #endif  // !defined(PyErr_SetFromWindowsErrWithFilename)
 
 
+#if !defined(PyErr_SetExcFromWindowsErrWithFilenameObject)
+PyObject *
+PyErr_SetExcFromWindowsErrWithFilenameObject(PyObject *type,
+                                             int ierr,
+                                             PyObject *filename) {
+    // Original function is too complex. Just raise OSError without
+    // filename.
+    return PyErr_SetFromWindowsErrWithFilename(ierr, NULL);
+}
+#endif // !defined(PyErr_SetExcFromWindowsErrWithFilenameObject)
+
+
 // PyPy 2.7
 #if !defined(PyErr_SetFromWindowsErr)
 PyObject *
@@ -84,8 +94,9 @@ PyErr_SetFromOSErrnoWithSyscall(const char *syscall) {
     char fullmsg[1024];
 
 #ifdef PSUTIL_WINDOWS
+    DWORD dwLastError = GetLastError();
     sprintf(fullmsg, "(originated from %s)", syscall);
-    PyErr_SetFromWindowsErrWithFilename(GetLastError(), fullmsg);
+    PyErr_SetFromWindowsErrWithFilename(dwLastError, fullmsg);
 #else
     PyObject *exc;
     sprintf(fullmsg, "%s (originated from %s)", strerror(errno), syscall);
@@ -130,51 +141,47 @@ AccessDenied(const char *syscall) {
     return NULL;
 }
 
-
-// ====================================================================
-// --- Global utils
-// ====================================================================
-
 /*
- * Enable testing mode. This has the same effect as setting PSUTIL_TESTING
- * env var. This dual method exists because updating os.environ on
- * Windows has no effect. Called on unit tests setup.
+ * Raise OverflowError if Python int value overflowed when converting to pid_t.
+ * Raise ValueError if Python int value is negative.
+ * Otherwise, return None.
  */
 PyObject *
-psutil_set_testing(PyObject *self, PyObject *args) {
-    PSUTIL_TESTING = 1;
-    PSUTIL_DEBUG = 1;
-    Py_INCREF(Py_None);
-    return Py_None;
-}
-
+psutil_check_pid_range(PyObject *self, PyObject *args) {
+#ifdef PSUTIL_WINDOWS
+    DWORD pid;
+#else
+    pid_t pid;
+#endif
 
-/*
- * Print a debug message on stderr. No-op if PSUTIL_DEBUG env var is not set.
- */
-void
-psutil_debug(const char* format, ...) {
-    va_list argptr;
-    if (PSUTIL_DEBUG) {
-        va_start(argptr, format);
-        fprintf(stderr, "psutil-debug> ");
-        vfprintf(stderr, format, argptr);
-        fprintf(stderr, "\n");
-        va_end(argptr);
+    if (!PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    if (pid < 0) {
+        PyErr_SetString(PyExc_ValueError, "pid must be a positive integer");
+        return NULL;
     }
+    Py_RETURN_NONE;
 }
 
+// Enable or disable PSUTIL_DEBUG messages.
+PyObject *
+psutil_set_debug(PyObject *self, PyObject *args) {
+    PyObject *value;
+    int x;
 
-/*
- * Called on module import on all platforms.
- */
-int
-psutil_setup(void) {
-    if (getenv("PSUTIL_DEBUG") != NULL)
+    if (!PyArg_ParseTuple(args, "O", &value))
+        return NULL;
+    x = PyObject_IsTrue(value);
+    if (x < 0) {
+        return NULL;
+    }
+    else if (x == 0) {
+        PSUTIL_DEBUG = 0;
+    }
+    else {
         PSUTIL_DEBUG = 1;
-    if (getenv("PSUTIL_TESTING") != NULL)
-        PSUTIL_TESTING = 1;
-    return 0;
+    }
+    Py_RETURN_NONE;
 }
 
 
@@ -197,6 +204,15 @@ convert_kvm_err(const char *syscall, char *errbuf) {
 }
 #endif
 
+// ====================================================================
+// --- macOS
+// ====================================================================
+
+#ifdef PSUTIL_OSX
+#include <mach/mach_time.h>
+
+struct mach_timebase_info PSUTIL_MACH_TIMEBASE_INFO;
+#endif
 
 // ====================================================================
 // --- Windows
@@ -337,7 +353,7 @@ psutil_loadlibs() {
     // minimum requirement: Win 7
     GetActiveProcessorCount = psutil_GetProcAddress(
         "kernel32", "GetActiveProcessorCount");
-    // minumum requirement: Win 7
+    // minimum requirement: Win 7
     GetLogicalProcessorInformationEx = psutil_GetProcAddressFromLib(
         "kernel32", "GetLogicalProcessorInformationEx");
     // minimum requirements: Windows Server Core
@@ -380,18 +396,6 @@ psutil_set_winver() {
 }
 
 
-int
-psutil_load_globals() {
-    if (psutil_loadlibs() != 0)
-        return 1;
-    if (psutil_set_winver() != 0)
-        return 1;
-    GetSystemInfo(&PSUTIL_SYSTEM_INFO);
-    InitializeCriticalSection(&PSUTIL_CRITICAL_SECTION);
-    return 0;
-}
-
-
 /*
  * Convert the hi and lo parts of a FILETIME structure or a LARGE_INTEGER
  * to a UNIX time.
@@ -427,3 +431,24 @@ psutil_LargeIntegerToUnixTime(LARGE_INTEGER li) {
                          (ULONGLONG)li.LowPart);
 }
 #endif  // PSUTIL_WINDOWS
+
+
+// Called on module import on all platforms.
+int
+psutil_setup(void) {
+    if (getenv("PSUTIL_DEBUG") != NULL)
+        PSUTIL_DEBUG = 1;
+
+#ifdef PSUTIL_WINDOWS
+    if (psutil_loadlibs() != 0)
+        return 1;
+    if (psutil_set_winver() != 0)
+        return 1;
+    GetSystemInfo(&PSUTIL_SYSTEM_INFO);
+    InitializeCriticalSection(&PSUTIL_CRITICAL_SECTION);
+#endif
+#ifdef PSUTIL_OSX
+    mach_timebase_info(&PSUTIL_MACH_TIMEBASE_INFO);
+#endif
+    return 0;
+}
diff --git a/contrib/python/psutil/py3/psutil/_psutil_common.h b/contrib/python/psutil/py3/psutil/_psutil_common.h
index cb0b399d8e..20c03ebd7c 100644
--- a/contrib/python/psutil/py3/psutil/_psutil_common.h
+++ b/contrib/python/psutil/py3/psutil/_psutil_common.h
@@ -10,7 +10,6 @@
 // --- Global vars / constants
 // ====================================================================
 
-extern int PSUTIL_TESTING;
 extern int PSUTIL_DEBUG;
 // a signaler for connections without an actual status
 static const int PSUTIL_CONN_NONE = 128;
@@ -32,11 +31,15 @@ static const int PSUTIL_CONN_NONE = 128;
     #define PyUnicode_DecodeFSDefaultAndSize   PyString_FromStringAndSize
 #endif
 
-#if defined(PSUTIL_WINDOWS) && \
-        defined(PYPY_VERSION) && \
-        !defined(PyErr_SetFromWindowsErrWithFilename)
-    PyObject *PyErr_SetFromWindowsErrWithFilename(int ierr,
-                                                  const char *filename);
+#if defined(PSUTIL_WINDOWS) && defined(PYPY_VERSION)
+    #if !defined(PyErr_SetFromWindowsErrWithFilename)
+        PyObject *PyErr_SetFromWindowsErrWithFilename(int ierr,
+                                                      const char *filename);
+    #endif
+    #if !defined(PyErr_SetExcFromWindowsErrWithFilenameObject)
+        PyObject *PyErr_SetExcFromWindowsErrWithFilenameObject(
+            PyObject *type, int ierr, PyObject *filename);
+    #endif
 #endif
 
 // --- _Py_PARSE_PID
@@ -100,10 +103,20 @@ PyObject* PyErr_SetFromOSErrnoWithSyscall(const char *syscall);
 // --- Global utils
 // ====================================================================
 
-PyObject* psutil_set_testing(PyObject *self, PyObject *args);
-void psutil_debug(const char* format, ...);
+PyObject* psutil_check_pid_range(PyObject *self, PyObject *args);
+PyObject* psutil_set_debug(PyObject *self, PyObject *args);
 int psutil_setup(void);
 
+
+// Print a debug message on stderr.
+#define psutil_debug(...) do { \
+    if (! PSUTIL_DEBUG) \
+        break; \
+    fprintf(stderr, "psutil-debug [%s:%d]> ", __FILE__, __LINE__); \
+    fprintf(stderr, __VA_ARGS__); \
+    fprintf(stderr, "\n");} while(0)
+
+
 // ====================================================================
 // --- BSD
 // ====================================================================
@@ -111,6 +124,16 @@ int psutil_setup(void);
 void convert_kvm_err(const char *syscall, char *errbuf);
 
 // ====================================================================
+// --- macOS
+// ====================================================================
+
+#ifdef PSUTIL_OSX
+    #include <mach/mach_time.h>
+
+    extern struct mach_timebase_info PSUTIL_MACH_TIMEBASE_INFO;
+#endif
+
+// ====================================================================
 // --- Windows
 // ====================================================================
 
@@ -149,7 +172,6 @@ void convert_kvm_err(const char *syscall, char *errbuf);
         #define AF_INET6 23
     #endif
 
-    int psutil_load_globals();
     PVOID psutil_GetProcAddress(LPCSTR libname, LPCSTR procname);
     PVOID psutil_GetProcAddressFromLib(LPCSTR libname, LPCSTR procname);
     PVOID psutil_SetFromNTStatusErr(NTSTATUS Status, const char *syscall);
diff --git a/contrib/python/psutil/py3/psutil/_psutil_linux.c b/contrib/python/psutil/py3/psutil/_psutil_linux.c
index 5836cd6b78..292e1c5524 100644
--- a/contrib/python/psutil/py3/psutil/_psutil_linux.c
+++ b/contrib/python/psutil/py3/psutil/_psutil_linux.c
@@ -10,504 +10,42 @@
     #define _GNU_SOURCE 1
 #endif
 #include <Python.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <mntent.h>
-#include <features.h>
-#include <utmp.h>
-#include <sched.h>
-#include <linux/version.h>
-#include <sys/syscall.h>
-#include <sys/sysinfo.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <linux/sockios.h>
-#include <linux/if.h>
-#include <sys/resource.h>
-
-// see: https://github.com/giampaolo/psutil/issues/659
-#ifdef PSUTIL_ETHTOOL_MISSING_TYPES
-    #include <linux/types.h>
-    typedef __u64 u64;
-    typedef __u32 u32;
-    typedef __u16 u16;
-    typedef __u8 u8;
-#endif
-/* Avoid redefinition of struct sysinfo with musl libc */
-#define _LINUX_SYSINFO_H
-#include <linux/ethtool.h>
-
-/* The minimum number of CPUs allocated in a cpu_set_t */
-static const int NCPUS_START = sizeof(unsigned long) * CHAR_BIT;
-
-// Linux >= 2.6.13
-#define PSUTIL_HAVE_IOPRIO defined(__NR_ioprio_get) && defined(__NR_ioprio_set)
-
-// Should exist starting from CentOS 6 (year 2011).
-#ifdef CPU_ALLOC
-    #define PSUTIL_HAVE_CPU_AFFINITY
-#endif
+#include <linux/ethtool.h>  // DUPLEX_*
 
 #include "_psutil_common.h"
-#include "_psutil_posix.h"
-
-// May happen on old RedHat versions, see:
-// https://github.com/giampaolo/psutil/issues/607
-#ifndef DUPLEX_UNKNOWN
-    #define DUPLEX_UNKNOWN 0xff
-#endif
-
-
-#if PSUTIL_HAVE_IOPRIO
-enum {
-    IOPRIO_WHO_PROCESS = 1,
-};
-
-static inline int
-ioprio_get(int which, int who) {
-    return syscall(__NR_ioprio_get, which, who);
-}
-
-static inline int
-ioprio_set(int which, int who, int ioprio) {
-    return syscall(__NR_ioprio_set, which, who, ioprio);
-}
-
-#define IOPRIO_CLASS_SHIFT 13
-#define IOPRIO_PRIO_MASK ((1UL << IOPRIO_CLASS_SHIFT) - 1)
-
-#define IOPRIO_PRIO_CLASS(mask) ((mask) >> IOPRIO_CLASS_SHIFT)
-#define IOPRIO_PRIO_DATA(mask) ((mask) & IOPRIO_PRIO_MASK)
-#define IOPRIO_PRIO_VALUE(class, data) (((class) << IOPRIO_CLASS_SHIFT) | data)
-
-
-/*
- * Return a (ioclass, iodata) Python tuple representing process I/O priority.
- */
-static PyObject *
-psutil_proc_ioprio_get(PyObject *self, PyObject *args) {
-    pid_t pid;
-    int ioprio, ioclass, iodata;
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    ioprio = ioprio_get(IOPRIO_WHO_PROCESS, pid);
-    if (ioprio == -1)
-        return PyErr_SetFromErrno(PyExc_OSError);
-    ioclass = IOPRIO_PRIO_CLASS(ioprio);
-    iodata = IOPRIO_PRIO_DATA(ioprio);
-    return Py_BuildValue("ii", ioclass, iodata);
-}
-
-
-/*
- * A wrapper around ioprio_set(); sets process I/O priority.
- * ioclass can be either IOPRIO_CLASS_RT, IOPRIO_CLASS_BE, IOPRIO_CLASS_IDLE
- * or 0. iodata goes from 0 to 7 depending on ioclass specified.
- */
-static PyObject *
-psutil_proc_ioprio_set(PyObject *self, PyObject *args) {
-    pid_t pid;
-    int ioprio, ioclass, iodata;
-    int retval;
-
-    if (! PyArg_ParseTuple(
-            args, _Py_PARSE_PID "ii", &pid, &ioclass, &iodata)) {
-        return NULL;
-    }
-    ioprio = IOPRIO_PRIO_VALUE(ioclass, iodata);
-    retval = ioprio_set(IOPRIO_WHO_PROCESS, pid, ioprio);
-    if (retval == -1)
-        return PyErr_SetFromErrno(PyExc_OSError);
-    Py_RETURN_NONE;
-}
-#endif
-
-
-/*
- * Return disk mounted partitions as a list of tuples including device,
- * mount point and filesystem type
- */
-static PyObject *
-psutil_disk_partitions(PyObject *self, PyObject *args) {
-    FILE *file = NULL;
-    struct mntent *entry;
-    char *mtab_path;
-    PyObject *py_dev = NULL;
-    PyObject *py_mountp = NULL;
-    PyObject *py_tuple = NULL;
-    PyObject *py_retlist = PyList_New(0);
-
-    if (py_retlist == NULL)
-        return NULL;
-
-    if (!PyArg_ParseTuple(args, "s", &mtab_path))
-        return NULL;
-
-    Py_BEGIN_ALLOW_THREADS
-    file = setmntent(mtab_path, "r");
-    Py_END_ALLOW_THREADS
-    if ((file == 0) || (file == NULL)) {
-        psutil_debug("setmntent() failed");
-        PyErr_SetFromErrnoWithFilename(PyExc_OSError, mtab_path);
-        goto error;
-    }
-
-    while ((entry = getmntent(file))) {
-        if (entry == NULL) {
-            PyErr_Format(PyExc_RuntimeError, "getmntent() syscall failed");
-            goto error;
-        }
-        py_dev = PyUnicode_DecodeFSDefault(entry->mnt_fsname);
-        if (! py_dev)
-            goto error;
-        py_mountp = PyUnicode_DecodeFSDefault(entry->mnt_dir);
-        if (! py_mountp)
-            goto error;
-        py_tuple = Py_BuildValue("(OOss)",
-                                 py_dev,             // device
-                                 py_mountp,          // mount point
-                                 entry->mnt_type,    // fs type
-                                 entry->mnt_opts);   // options
-        if (! py_tuple)
-            goto error;
-        if (PyList_Append(py_retlist, py_tuple))
-            goto error;
-        Py_CLEAR(py_dev);
-        Py_CLEAR(py_mountp);
-        Py_CLEAR(py_tuple);
-    }
-    endmntent(file);
-    return py_retlist;
-
-error:
-    if (file != NULL)
-        endmntent(file);
-    Py_XDECREF(py_dev);
-    Py_XDECREF(py_mountp);
-    Py_XDECREF(py_tuple);
-    Py_DECREF(py_retlist);
-    return NULL;
-}
-
-
-/*
- * A wrapper around sysinfo(), return system memory usage statistics.
- */
-static PyObject *
-psutil_linux_sysinfo(PyObject *self, PyObject *args) {
-    struct sysinfo info;
-
-    if (sysinfo(&info) != 0)
-        return PyErr_SetFromErrno(PyExc_OSError);
-    // note: boot time might also be determined from here
-    return Py_BuildValue(
-        "(kkkkkkI)",
-        info.totalram,  // total
-        info.freeram,  // free
-        info.bufferram, // buffer
-        info.sharedram, // shared
-        info.totalswap, // swap tot
-        info.freeswap,  // swap free
-        info.mem_unit  // multiplier
-    );
-}
-
-
-/*
- * Return process CPU affinity as a Python list
- */
-#ifdef PSUTIL_HAVE_CPU_AFFINITY
-
-static PyObject *
-psutil_proc_cpu_affinity_get(PyObject *self, PyObject *args) {
-    int cpu, ncpus, count, cpucount_s;
-    pid_t pid;
-    size_t setsize;
-    cpu_set_t *mask = NULL;
-    PyObject *py_list = NULL;
+#include "arch/linux/disk.h"
+#include "arch/linux/mem.h"
+#include "arch/linux/net.h"
+#include "arch/linux/proc.h"
+#include "arch/linux/users.h"
 
-    if (!PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    ncpus = NCPUS_START;
-    while (1) {
-        setsize = CPU_ALLOC_SIZE(ncpus);
-        mask = CPU_ALLOC(ncpus);
-        if (mask == NULL) {
-            psutil_debug("CPU_ALLOC() failed");
-            return PyErr_NoMemory();
-        }
-        if (sched_getaffinity(pid, setsize, mask) == 0)
-            break;
-        CPU_FREE(mask);
-        if (errno != EINVAL)
-            return PyErr_SetFromErrno(PyExc_OSError);
-        if (ncpus > INT_MAX / 2) {
-            PyErr_SetString(PyExc_OverflowError, "could not allocate "
-                            "a large enough CPU set");
-            return NULL;
-        }
-        ncpus = ncpus * 2;
-    }
-
-    py_list = PyList_New(0);
-    if (py_list == NULL)
-        goto error;
-
-    cpucount_s = CPU_COUNT_S(setsize, mask);
-    for (cpu = 0, count = cpucount_s; count; cpu++) {
-        if (CPU_ISSET_S(cpu, setsize, mask)) {
-#if PY_MAJOR_VERSION >= 3
-            PyObject *cpu_num = PyLong_FromLong(cpu);
-#else
-            PyObject *cpu_num = PyInt_FromLong(cpu);
-#endif
-            if (cpu_num == NULL)
-                goto error;
-            if (PyList_Append(py_list, cpu_num)) {
-                Py_DECREF(cpu_num);
-                goto error;
-            }
-            Py_DECREF(cpu_num);
-            --count;
-        }
-    }
-    CPU_FREE(mask);
-    return py_list;
-
-error:
-    if (mask)
-        CPU_FREE(mask);
-    Py_XDECREF(py_list);
-    return NULL;
-}
-
-
-/*
- * Set process CPU affinity; expects a bitmask
- */
-static PyObject *
-psutil_proc_cpu_affinity_set(PyObject *self, PyObject *args) {
-    cpu_set_t cpu_set;
-    size_t len;
-    pid_t pid;
-    int i, seq_len;
-    PyObject *py_cpu_set;
-    PyObject *py_cpu_seq = NULL;
-
-    if (!PyArg_ParseTuple(args, _Py_PARSE_PID "O", &pid, &py_cpu_set))
-        return NULL;
-
-    if (!PySequence_Check(py_cpu_set)) {
-        PyErr_Format(PyExc_TypeError, "sequence argument expected, got %s",
-                     Py_TYPE(py_cpu_set)->tp_name);
-        goto error;
-    }
-
-    py_cpu_seq = PySequence_Fast(py_cpu_set, "expected a sequence or integer");
-    if (!py_cpu_seq)
-        goto error;
-    seq_len = PySequence_Fast_GET_SIZE(py_cpu_seq);
-    CPU_ZERO(&cpu_set);
-    for (i = 0; i < seq_len; i++) {
-        PyObject *item = PySequence_Fast_GET_ITEM(py_cpu_seq, i);
-#if PY_MAJOR_VERSION >= 3
-        long value = PyLong_AsLong(item);
-#else
-        long value = PyInt_AsLong(item);
-#endif
-        if ((value == -1) || PyErr_Occurred()) {
-            if (!PyErr_Occurred())
-                PyErr_SetString(PyExc_ValueError, "invalid CPU value");
-            goto error;
-        }
-        CPU_SET(value, &cpu_set);
-    }
-
-    len = sizeof(cpu_set);
-    if (sched_setaffinity(pid, len, &cpu_set)) {
-        PyErr_SetFromErrno(PyExc_OSError);
-        goto error;
-    }
-
-    Py_DECREF(py_cpu_seq);
-    Py_RETURN_NONE;
-
-error:
-    if (py_cpu_seq != NULL)
-        Py_DECREF(py_cpu_seq);
-    return NULL;
-}
-#endif  /* PSUTIL_HAVE_CPU_AFFINITY */
-
-
-/*
- * Return currently connected users as a list of tuples.
- */
-static PyObject *
-psutil_users(PyObject *self, PyObject *args) {
-    struct utmp *ut;
-    PyObject *py_retlist = PyList_New(0);
-    PyObject *py_tuple = NULL;
-    PyObject *py_username = NULL;
-    PyObject *py_tty = NULL;
-    PyObject *py_hostname = NULL;
-    PyObject *py_user_proc = NULL;
-
-    if (py_retlist == NULL)
-        return NULL;
-    setutent();
-    while (NULL != (ut = getutent())) {
-        py_tuple = NULL;
-        py_user_proc = NULL;
-        if (ut->ut_type == USER_PROCESS)
-            py_user_proc = Py_True;
-        else
-            py_user_proc = Py_False;
-        py_username = PyUnicode_DecodeFSDefault(ut->ut_user);
-        if (! py_username)
-            goto error;
-        py_tty = PyUnicode_DecodeFSDefault(ut->ut_line);
-        if (! py_tty)
-            goto error;
-        py_hostname = PyUnicode_DecodeFSDefault(ut->ut_host);
-        if (! py_hostname)
-            goto error;
-
-        py_tuple = Py_BuildValue(
-            "OOOfO" _Py_PARSE_PID,
-            py_username,              // username
-            py_tty,                   // tty
-            py_hostname,              // hostname
-            (float)ut->ut_tv.tv_sec,  // tstamp
-            py_user_proc,             // (bool) user process
-            ut->ut_pid                // process id
-        );
-        if (! py_tuple)
-            goto error;
-        if (PyList_Append(py_retlist, py_tuple))
-            goto error;
-        Py_CLEAR(py_username);
-        Py_CLEAR(py_tty);
-        Py_CLEAR(py_hostname);
-        Py_CLEAR(py_tuple);
-    }
-    endutent();
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_username);
-    Py_XDECREF(py_tty);
-    Py_XDECREF(py_hostname);
-    Py_XDECREF(py_tuple);
-    Py_DECREF(py_retlist);
-    endutent();
-    return NULL;
-}
-
-
-/*
- * Return stats about a particular network
- * interface.  References:
- * https://github.com/dpaleino/wicd/blob/master/wicd/backends/be-ioctl.py
- * http://www.i-scream.org/libstatgrab/
- */
-static PyObject*
-psutil_net_if_duplex_speed(PyObject* self, PyObject* args) {
-    char *nic_name;
-    int sock = 0;
-    int ret;
-    int duplex;
-    int speed;
-    struct ifreq ifr;
-    struct ethtool_cmd ethcmd;
-    PyObject *py_retlist = NULL;
-
-    if (! PyArg_ParseTuple(args, "s", &nic_name))
-        return NULL;
-
-    sock = socket(AF_INET, SOCK_DGRAM, 0);
-    if (sock == -1)
-        return PyErr_SetFromOSErrnoWithSyscall("socket()");
-    PSUTIL_STRNCPY(ifr.ifr_name, nic_name, sizeof(ifr.ifr_name));
-
-    // duplex and speed
-    memset(&ethcmd, 0, sizeof ethcmd);
-    ethcmd.cmd = ETHTOOL_GSET;
-    ifr.ifr_data = (void *)&ethcmd;
-    ret = ioctl(sock, SIOCETHTOOL, &ifr);
-
-    if (ret != -1) {
-        duplex = ethcmd.duplex;
-        speed = ethcmd.speed;
-    }
-    else {
-        if ((errno == EOPNOTSUPP) || (errno == EINVAL)) {
-            // EOPNOTSUPP may occur in case of wi-fi cards.
-            // For EINVAL see:
-            // https://github.com/giampaolo/psutil/issues/797
-            //     #issuecomment-202999532
-            duplex = DUPLEX_UNKNOWN;
-            speed = 0;
-        }
-        else {
-            PyErr_SetFromOSErrnoWithSyscall("ioctl(SIOCETHTOOL)");
-            goto error;
-        }
-    }
-
-    py_retlist = Py_BuildValue("[ii]", duplex, speed);
-    if (!py_retlist)
-        goto error;
-    close(sock);
-    return py_retlist;
-
-error:
-    if (sock != -1)
-        close(sock);
-    return NULL;
-}
-
-
-/*
- * Module init.
- */
 
 static PyMethodDef mod_methods[] = {
     // --- per-process functions
-
-#if PSUTIL_HAVE_IOPRIO
-    {"proc_ioprio_get", psutil_proc_ioprio_get, METH_VARARGS,
-     "Get process I/O priority"},
-    {"proc_ioprio_set", psutil_proc_ioprio_set, METH_VARARGS,
-     "Set process I/O priority"},
+#ifdef PSUTIL_HAVE_IOPRIO
+    {"proc_ioprio_get", psutil_proc_ioprio_get, METH_VARARGS},
+    {"proc_ioprio_set", psutil_proc_ioprio_set, METH_VARARGS},
 #endif
 #ifdef PSUTIL_HAVE_CPU_AFFINITY
-    {"proc_cpu_affinity_get", psutil_proc_cpu_affinity_get, METH_VARARGS,
-     "Return process CPU affinity as a Python long (the bitmask)."},
-    {"proc_cpu_affinity_set", psutil_proc_cpu_affinity_set, METH_VARARGS,
-     "Set process CPU affinity; expects a bitmask."},
+    {"proc_cpu_affinity_get", psutil_proc_cpu_affinity_get, METH_VARARGS},
+    {"proc_cpu_affinity_set", psutil_proc_cpu_affinity_set, METH_VARARGS},
 #endif
-
     // --- system related functions
-
-    {"disk_partitions", psutil_disk_partitions, METH_VARARGS,
-     "Return disk mounted partitions as a list of tuples including "
-     "device, mount point and filesystem type"},
-    {"users", psutil_users, METH_VARARGS,
-     "Return currently connected users as a list of tuples"},
-    {"net_if_duplex_speed", psutil_net_if_duplex_speed, METH_VARARGS,
-     "Return duplex and speed info about a NIC"},
-
+    {"disk_partitions", psutil_disk_partitions, METH_VARARGS},
+    {"users", psutil_users, METH_VARARGS},
+    {"net_if_duplex_speed", psutil_net_if_duplex_speed, METH_VARARGS},
     // --- linux specific
-
-    {"linux_sysinfo", psutil_linux_sysinfo, METH_VARARGS,
-     "A wrapper around sysinfo(), return system memory usage statistics"},
+    {"linux_sysinfo", psutil_linux_sysinfo, METH_VARARGS},
     // --- others
-    {"set_testing", psutil_set_testing, METH_NOARGS,
-     "Set psutil in testing mode"},
-
+    {"check_pid_range", psutil_check_pid_range, METH_VARARGS},
+    {"set_debug", psutil_set_debug, METH_VARARGS},
     {NULL, NULL, 0, NULL}
 };
+// May happen on old RedHat versions, see:
+// https://github.com/giampaolo/psutil/issues/607
+#ifndef DUPLEX_UNKNOWN
+    #define DUPLEX_UNKNOWN 0xff
+#endif
 
 
 #if PY_MAJOR_VERSION >= 3
diff --git a/contrib/python/psutil/py3/psutil/_psutil_osx.c b/contrib/python/psutil/py3/psutil/_psutil_osx.c
index 13d0bb6856..369fbbfb48 100644
--- a/contrib/python/psutil/py3/psutil/_psutil_osx.c
+++ b/contrib/python/psutil/py3/psutil/_psutil_osx.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
@@ -7,1816 +7,55 @@
  */
 
 #include <Python.h>
-#include <assert.h>
-#include <errno.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <utmpx.h>
-#include <sys/sysctl.h>
-#include <sys/vmmeter.h>
-#include <libproc.h>
-#include <sys/proc_info.h>
+#include <sys/proc.h>
 #include <netinet/tcp_fsm.h>
-#include <arpa/inet.h>
-#include <net/if_dl.h>
-#include <pwd.h>
-#include <unistd.h>
-
-#include <mach/mach.h>
-#include <mach/task.h>
-#include <mach/mach_init.h>
-#include <mach/host_info.h>
-#include <mach/mach_host.h>
-#include <mach/mach_traps.h>
-#include <mach/mach_vm.h>
-#include <mach/shared_region.h>
-
-#include <mach-o/loader.h>
-
-#include <CoreFoundation/CoreFoundation.h>
-#include <IOKit/IOKitLib.h>
-#include <IOKit/storage/IOBlockStorageDriver.h>
-#include <IOKit/storage/IOMedia.h>
-#include <IOKit/IOBSD.h>
-#include <IOKit/ps/IOPowerSources.h>
-#include <IOKit/ps/IOPSKeys.h>
 
 #include "_psutil_common.h"
-#include "_psutil_posix.h"
-#include "arch/osx/process_info.h"
-
-
-#define PSUTIL_TV2DOUBLE(t) ((t).tv_sec + (t).tv_usec / 1000000.0)
-
-static PyObject *ZombieProcessError;
-
-
-/*
- * A wrapper around host_statistics() invoked with HOST_VM_INFO.
- */
-int
-psutil_sys_vminfo(vm_statistics_data_t *vmstat) {
-    kern_return_t ret;
-    mach_msg_type_number_t count = sizeof(*vmstat) / sizeof(integer_t);
-    mach_port_t mport = mach_host_self();
-
-    ret = host_statistics(mport, HOST_VM_INFO, (host_info_t)vmstat, &count);
-    if (ret != KERN_SUCCESS) {
-        PyErr_Format(
-            PyExc_RuntimeError,
-            "host_statistics(HOST_VM_INFO) syscall failed: %s",
-            mach_error_string(ret));
-        return 0;
-    }
-    mach_port_deallocate(mach_task_self(), mport);
-    return 1;
-}
-
-
-/*
- * A wrapper around task_for_pid() which sucks big time:
- * - it's not documented
- * - errno is set only sometimes
- * - sometimes errno is ENOENT (?!?)
- * - for PIDs != getpid() or PIDs which are not members of the procmod
- *   it requires root
- * As such we can only guess what the heck went wrong and fail either
- * with NoSuchProcess, ZombieProcessError or giveup with AccessDenied.
- * Here's some history:
- * https://github.com/giampaolo/psutil/issues/1181
- * https://github.com/giampaolo/psutil/issues/1209
- * https://github.com/giampaolo/psutil/issues/1291#issuecomment-396062519
- */
-int
-psutil_task_for_pid(pid_t pid, mach_port_t *task)
-{
-    // See: https://github.com/giampaolo/psutil/issues/1181
-    kern_return_t err = KERN_SUCCESS;
-
-    err = task_for_pid(mach_task_self(), pid, task);
-    if (err != KERN_SUCCESS) {
-        if (psutil_pid_exists(pid) == 0)
-            NoSuchProcess("task_for_pid");
-        else if (psutil_is_zombie(pid) == 1)
-            PyErr_SetString(ZombieProcessError,
-                            "task_for_pid -> psutil_is_zombie -> 1");
-        else {
-            psutil_debug(
-                "task_for_pid() failed (pid=%ld, err=%i, errno=%i, msg='%s'); "
-                "setting AccessDenied()",
-                pid, err, errno, mach_error_string(err));
-            AccessDenied("task_for_pid");
-        }
-        return 1;
-    }
-    return 0;
-}
-
-
-/*
- * Return a Python list of all the PIDs running on the system.
- */
-static PyObject *
-psutil_pids(PyObject *self, PyObject *args) {
-    kinfo_proc *proclist = NULL;
-    kinfo_proc *orig_address = NULL;
-    size_t num_processes;
-    size_t idx;
-    PyObject *py_pid = NULL;
-    PyObject *py_retlist = PyList_New(0);
-
-    if (py_retlist == NULL)
-        return NULL;
-
-    if (psutil_get_proc_list(&proclist, &num_processes) != 0)
-        goto error;
-
-    // save the address of proclist so we can free it later
-    orig_address = proclist;
-    for (idx = 0; idx < num_processes; idx++) {
-        py_pid = PyLong_FromPid(proclist->kp_proc.p_pid);
-        if (! py_pid)
-            goto error;
-        if (PyList_Append(py_retlist, py_pid))
-            goto error;
-        Py_CLEAR(py_pid);
-        proclist++;
-    }
-    free(orig_address);
-
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_pid);
-    Py_DECREF(py_retlist);
-    if (orig_address != NULL)
-        free(orig_address);
-    return NULL;
-}
-
-
-/*
- * Return multiple process info as a Python tuple in one shot by
- * using sysctl() and filling up a kinfo_proc struct.
- * It should be possible to do this for all processes without
- * incurring into permission (EPERM) errors.
- * This will also succeed for zombie processes returning correct
- * information.
- */
-static PyObject *
-psutil_proc_kinfo_oneshot(PyObject *self, PyObject *args) {
-    pid_t pid;
-    struct kinfo_proc kp;
-    PyObject *py_name;
-    PyObject *py_retlist;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    if (psutil_get_kinfo_proc(pid, &kp) == -1)
-        return NULL;
-
-    py_name = PyUnicode_DecodeFSDefault(kp.kp_proc.p_comm);
-    if (! py_name) {
-        // Likely a decoding error. We don't want to fail the whole
-        // operation. The python module may retry with proc_name().
-        PyErr_Clear();
-        py_name = Py_None;
-    }
-
-    py_retlist = Py_BuildValue(
-        _Py_PARSE_PID "llllllidiO",
-        kp.kp_eproc.e_ppid,                        // (pid_t) ppid
-        (long)kp.kp_eproc.e_pcred.p_ruid,          // (long) real uid
-        (long)kp.kp_eproc.e_ucred.cr_uid,          // (long) effective uid
-        (long)kp.kp_eproc.e_pcred.p_svuid,         // (long) saved uid
-        (long)kp.kp_eproc.e_pcred.p_rgid,          // (long) real gid
-        (long)kp.kp_eproc.e_ucred.cr_groups[0],    // (long) effective gid
-        (long)kp.kp_eproc.e_pcred.p_svgid,         // (long) saved gid
-        kp.kp_eproc.e_tdev,                        // (int) tty nr
-        PSUTIL_TV2DOUBLE(kp.kp_proc.p_starttime),  // (double) create time
-        (int)kp.kp_proc.p_stat,                    // (int) status
-        py_name                                    // (pystr) name
-    );
-
-    if (py_retlist != NULL) {
-        // XXX shall we decref() also in case of Py_BuildValue() error?
-        Py_DECREF(py_name);
-    }
-    return py_retlist;
-}
-
-
-/*
- * Return multiple process info as a Python tuple in one shot by
- * using proc_pidinfo(PROC_PIDTASKINFO) and filling a proc_taskinfo
- * struct.
- * Contrarily from proc_kinfo above this function will fail with
- * EACCES for PIDs owned by another user and with ESRCH for zombie
- * processes.
- */
-static PyObject *
-psutil_proc_pidtaskinfo_oneshot(PyObject *self, PyObject *args) {
-    pid_t pid;
-    struct proc_taskinfo pti;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    if (psutil_proc_pidinfo(pid, PROC_PIDTASKINFO, 0, &pti, sizeof(pti)) <= 0)
-        return NULL;
-
-    return Py_BuildValue(
-        "(ddKKkkkk)",
-        (float)pti.pti_total_user / 1000000000.0,     // (float) cpu user time
-        (float)pti.pti_total_system / 1000000000.0,   // (float) cpu sys time
-        // Note about memory: determining other mem stats on macOS is a mess:
-        // http://www.opensource.apple.com/source/top/top-67/libtop.c?txt
-        // I just give up.
-        // struct proc_regioninfo pri;
-        // psutil_proc_pidinfo(pid, PROC_PIDREGIONINFO, 0, &pri, sizeof(pri))
-        pti.pti_resident_size,  // (uns long long) rss
-        pti.pti_virtual_size,   // (uns long long) vms
-        pti.pti_faults,         // (uns long) number of page faults (pages)
-        pti.pti_pageins,        // (uns long) number of actual pageins (pages)
-        pti.pti_threadnum,      // (uns long) num threads
-        // Unvoluntary value seems not to be available;
-        // pti.pti_csw probably refers to the sum of the two;
-        // getrusage() numbers seems to confirm this theory.
-        pti.pti_csw             // (uns long) voluntary ctx switches
-    );
-}
-
-
-/*
- * Return process name from kinfo_proc as a Python string.
- */
-static PyObject *
-psutil_proc_name(PyObject *self, PyObject *args) {
-    pid_t pid;
-    struct kinfo_proc kp;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    if (psutil_get_kinfo_proc(pid, &kp) == -1)
-        return NULL;
-    return PyUnicode_DecodeFSDefault(kp.kp_proc.p_comm);
-}
-
-
-/*
- * Return process current working directory.
- * Raises NSP in case of zombie process.
- */
-static PyObject *
-psutil_proc_cwd(PyObject *self, PyObject *args) {
-    pid_t pid;
-    struct proc_vnodepathinfo pathinfo;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    if (psutil_proc_pidinfo(
-            pid, PROC_PIDVNODEPATHINFO, 0, &pathinfo, sizeof(pathinfo)) <= 0)
-    {
-        return NULL;
-    }
-
-    return PyUnicode_DecodeFSDefault(pathinfo.pvi_cdir.vip_path);
-}
-
-
-/*
- * Return path of the process executable.
- */
-static PyObject *
-psutil_proc_exe(PyObject *self, PyObject *args) {
-    pid_t pid;
-    char buf[PATH_MAX];
-    int ret;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    errno = 0;
-    ret = proc_pidpath(pid, &buf, sizeof(buf));
-    if (ret == 0) {
-        if (pid == 0) {
-            AccessDenied("automatically set for PID 0");
-            return NULL;
-        }
-        else if (errno == ENOENT) {
-            // It may happen (file not found error) if the process is
-            // still alive but the executable which launched it got
-            // deleted, see:
-            // https://github.com/giampaolo/psutil/issues/1738
-            return Py_BuildValue("s", "");
-        }
-        else {
-            psutil_raise_for_pid(pid, "proc_pidpath()");
-            return NULL;
-        }
-    }
-    return PyUnicode_DecodeFSDefault(buf);
-}
-
-
-/*
- * Return process cmdline as a Python list of cmdline arguments.
- */
-static PyObject *
-psutil_proc_cmdline(PyObject *self, PyObject *args) {
-    pid_t pid;
-    PyObject *py_retlist = NULL;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    // get the commandline, defined in arch/osx/process_info.c
-    py_retlist = psutil_get_cmdline(pid);
-    return py_retlist;
-}
-
-
-/*
- * Return process environment as a Python string.
- */
-static PyObject *
-psutil_proc_environ(PyObject *self, PyObject *args) {
-    pid_t pid;
-    PyObject *py_retdict = NULL;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    // get the environment block, defined in arch/osx/process_info.c
-    py_retdict = psutil_get_environ(pid);
-    return py_retdict;
-}
-
-
-/*
- * Return the number of logical CPUs in the system.
- * XXX this could be shared with BSD.
- */
-static PyObject *
-psutil_cpu_count_logical(PyObject *self, PyObject *args) {
-    /*
-    int mib[2];
-    int ncpu;
-    size_t len;
-    mib[0] = CTL_HW;
-    mib[1] = HW_NCPU;
-    len = sizeof(ncpu);
-
-    if (sysctl(mib, 2, &ncpu, &len, NULL, 0) == -1)
-        Py_RETURN_NONE;  // mimic os.cpu_count()
-    else
-        return Py_BuildValue("i", ncpu);
-    */
-    int num;
-    size_t size = sizeof(int);
-
-    if (sysctlbyname("hw.logicalcpu", &num, &size, NULL, 2))
-        Py_RETURN_NONE;  // mimic os.cpu_count()
-    else
-        return Py_BuildValue("i", num);
-}
-
-
-/*
- * Return the number of physical CPUs in the system.
- */
-static PyObject *
-psutil_cpu_count_phys(PyObject *self, PyObject *args) {
-    int num;
-    size_t size = sizeof(int);
-
-    if (sysctlbyname("hw.physicalcpu", &num, &size, NULL, 0))
-        Py_RETURN_NONE;  // mimic os.cpu_count()
-    else
-        return Py_BuildValue("i", num);
-}
-
-
-/*
- * Indicates if the given virtual address on the given architecture is in the
- * shared VM region.
- */
-static bool
-psutil_in_shared_region(mach_vm_address_t addr, cpu_type_t type) {
-    mach_vm_address_t base;
-    mach_vm_address_t size;
-
-    switch (type) {
-        case CPU_TYPE_ARM:
-            base = SHARED_REGION_BASE_ARM;
-            size = SHARED_REGION_SIZE_ARM;
-            break;
-        case CPU_TYPE_I386:
-            base = SHARED_REGION_BASE_I386;
-            size = SHARED_REGION_SIZE_I386;
-            break;
-        case CPU_TYPE_X86_64:
-            base = SHARED_REGION_BASE_X86_64;
-            size = SHARED_REGION_SIZE_X86_64;
-            break;
-        default:
-            return false;
-    }
-
-    return base <= addr && addr < (base + size);
-}
-
-
-/*
- * Returns the USS (unique set size) of the process. Reference:
- * https://dxr.mozilla.org/mozilla-central/source/xpcom/base/
- *     nsMemoryReporterManager.cpp
- */
-static PyObject *
-psutil_proc_memory_uss(PyObject *self, PyObject *args) {
-    pid_t pid;
-    size_t len;
-    cpu_type_t cpu_type;
-    size_t private_pages = 0;
-    mach_vm_size_t size = 0;
-    mach_msg_type_number_t info_count = VM_REGION_TOP_INFO_COUNT;
-    kern_return_t kr;
-    long pagesize = psutil_getpagesize();
-    mach_vm_address_t addr = MACH_VM_MIN_ADDRESS;
-    mach_port_t task = MACH_PORT_NULL;
-    vm_region_top_info_data_t info;
-    mach_port_t object_name;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    if (psutil_task_for_pid(pid, &task) != 0)
-        return NULL;
-
-    len = sizeof(cpu_type);
-    if (sysctlbyname("sysctl.proc_cputype", &cpu_type, &len, NULL, 0) != 0) {
-        return PyErr_SetFromOSErrnoWithSyscall(
-            "sysctlbyname('sysctl.proc_cputype')");
-    }
-
-    // Roughly based on libtop_update_vm_regions in
-    // http://www.opensource.apple.com/source/top/top-100.1.2/libtop.c
-    for (addr = 0; ; addr += size) {
-        kr = mach_vm_region(
-            task, &addr, &size, VM_REGION_TOP_INFO, (vm_region_info_t)&info,
-            &info_count, &object_name);
-        if (kr == KERN_INVALID_ADDRESS) {
-            // Done iterating VM regions.
-            break;
-        }
-        else if (kr != KERN_SUCCESS) {
-            PyErr_Format(
-                PyExc_RuntimeError,
-                "mach_vm_region(VM_REGION_TOP_INFO) syscall failed");
-            return NULL;
-        }
-
-        if (psutil_in_shared_region(addr, cpu_type) &&
-                info.share_mode != SM_PRIVATE) {
-            continue;
-        }
-
-        switch (info.share_mode) {
-#ifdef SM_LARGE_PAGE
-            case SM_LARGE_PAGE:
-                // NB: Large pages are not shareable and always resident.
-#endif
-            case SM_PRIVATE:
-                private_pages += info.private_pages_resident;
-                private_pages += info.shared_pages_resident;
-                break;
-            case SM_COW:
-                private_pages += info.private_pages_resident;
-                if (info.ref_count == 1) {
-                    // Treat copy-on-write pages as private if they only
-                    // have one reference.
-                    private_pages += info.shared_pages_resident;
-                }
-                break;
-            case SM_SHARED:
-            default:
-                break;
-        }
-    }
-
-    mach_port_deallocate(mach_task_self(), task);
-    return Py_BuildValue("K", private_pages * pagesize);
-}
-
-
-/*
- * Return system virtual memory stats.
- * See:
- * https://opensource.apple.com/source/system_cmds/system_cmds-790/
- *     vm_stat.tproj/vm_stat.c.auto.html
- */
-static PyObject *
-psutil_virtual_mem(PyObject *self, PyObject *args) {
-    int      mib[2];
-    uint64_t total;
-    size_t   len = sizeof(total);
-    vm_statistics_data_t vm;
-    long pagesize = psutil_getpagesize();
-    // physical mem
-    mib[0] = CTL_HW;
-    mib[1] = HW_MEMSIZE;
-
-    // This is also available as sysctlbyname("hw.memsize").
-    if (sysctl(mib, 2, &total, &len, NULL, 0)) {
-        if (errno != 0)
-            PyErr_SetFromErrno(PyExc_OSError);
-        else
-            PyErr_Format(
-                PyExc_RuntimeError, "sysctl(HW_MEMSIZE) syscall failed");
-        return NULL;
-    }
-
-    // vm
-    if (!psutil_sys_vminfo(&vm))
-        return NULL;
-
-    return Py_BuildValue(
-        "KKKKKK",
-        total,
-        (unsigned long long) vm.active_count * pagesize,  // active
-        (unsigned long long) vm.inactive_count * pagesize,  // inactive
-        (unsigned long long) vm.wire_count * pagesize,  // wired
-        (unsigned long long) vm.free_count * pagesize,  // free
-        (unsigned long long) vm.speculative_count * pagesize  // speculative
-    );
-}
-
-
-/*
- * Return stats about swap memory.
- */
-static PyObject *
-psutil_swap_mem(PyObject *self, PyObject *args) {
-    int mib[2];
-    size_t size;
-    struct xsw_usage totals;
-    vm_statistics_data_t vmstat;
-    long pagesize = psutil_getpagesize();
-
-    mib[0] = CTL_VM;
-    mib[1] = VM_SWAPUSAGE;
-    size = sizeof(totals);
-    if (sysctl(mib, 2, &totals, &size, NULL, 0) == -1) {
-        if (errno != 0)
-            PyErr_SetFromErrno(PyExc_OSError);
-        else
-            PyErr_Format(
-                PyExc_RuntimeError, "sysctl(VM_SWAPUSAGE) syscall failed");
-        return NULL;
-    }
-    if (!psutil_sys_vminfo(&vmstat))
-        return NULL;
-
-    return Py_BuildValue(
-        "LLLKK",
-        totals.xsu_total,
-        totals.xsu_used,
-        totals.xsu_avail,
-        (unsigned long long)vmstat.pageins * pagesize,
-        (unsigned long long)vmstat.pageouts * pagesize);
-}
-
-
-/*
- * Return a Python tuple representing user, kernel and idle CPU times
- */
-static PyObject *
-psutil_cpu_times(PyObject *self, PyObject *args) {
-    mach_msg_type_number_t count = HOST_CPU_LOAD_INFO_COUNT;
-    kern_return_t error;
-    host_cpu_load_info_data_t r_load;
-
-    mach_port_t host_port = mach_host_self();
-    error = host_statistics(host_port, HOST_CPU_LOAD_INFO,
-                            (host_info_t)&r_load, &count);
-    if (error != KERN_SUCCESS) {
-        return PyErr_Format(
-            PyExc_RuntimeError,
-            "host_statistics(HOST_CPU_LOAD_INFO) syscall failed: %s",
-            mach_error_string(error));
-    }
-    mach_port_deallocate(mach_task_self(), host_port);
-
-    return Py_BuildValue(
-        "(dddd)",
-        (double)r_load.cpu_ticks[CPU_STATE_USER] / CLK_TCK,
-        (double)r_load.cpu_ticks[CPU_STATE_NICE] / CLK_TCK,
-        (double)r_load.cpu_ticks[CPU_STATE_SYSTEM] / CLK_TCK,
-        (double)r_load.cpu_ticks[CPU_STATE_IDLE] / CLK_TCK
-    );
-}
-
-
-/*
- * Return a Python list of tuple representing per-cpu times
- */
-static PyObject *
-psutil_per_cpu_times(PyObject *self, PyObject *args) {
-    natural_t cpu_count;
-    natural_t i;
-    processor_info_array_t info_array;
-    mach_msg_type_number_t info_count;
-    kern_return_t error;
-    processor_cpu_load_info_data_t *cpu_load_info = NULL;
-    int ret;
-    PyObject *py_retlist = PyList_New(0);
-    PyObject *py_cputime = NULL;
-
-    if (py_retlist == NULL)
-        return NULL;
-
-    mach_port_t host_port = mach_host_self();
-    error = host_processor_info(host_port, PROCESSOR_CPU_LOAD_INFO,
-                                &cpu_count, &info_array, &info_count);
-    if (error != KERN_SUCCESS) {
-        PyErr_Format(
-            PyExc_RuntimeError,
-            "host_processor_info(PROCESSOR_CPU_LOAD_INFO) syscall failed: %s",
-             mach_error_string(error));
-        goto error;
-    }
-    mach_port_deallocate(mach_task_self(), host_port);
-
-    cpu_load_info = (processor_cpu_load_info_data_t *) info_array;
-
-    for (i = 0; i < cpu_count; i++) {
-        py_cputime = Py_BuildValue(
-            "(dddd)",
-            (double)cpu_load_info[i].cpu_ticks[CPU_STATE_USER] / CLK_TCK,
-            (double)cpu_load_info[i].cpu_ticks[CPU_STATE_NICE] / CLK_TCK,
-            (double)cpu_load_info[i].cpu_ticks[CPU_STATE_SYSTEM] / CLK_TCK,
-            (double)cpu_load_info[i].cpu_ticks[CPU_STATE_IDLE] / CLK_TCK
-        );
-        if (!py_cputime)
-            goto error;
-        if (PyList_Append(py_retlist, py_cputime))
-            goto error;
-        Py_CLEAR(py_cputime);
-    }
-
-    ret = vm_deallocate(mach_task_self(), (vm_address_t)info_array,
-                        info_count * sizeof(int));
-    if (ret != KERN_SUCCESS)
-        PyErr_WarnEx(PyExc_RuntimeWarning, "vm_deallocate() failed", 2);
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_cputime);
-    Py_DECREF(py_retlist);
-    if (cpu_load_info != NULL) {
-        ret = vm_deallocate(mach_task_self(), (vm_address_t)info_array,
-                            info_count * sizeof(int));
-        if (ret != KERN_SUCCESS)
-            PyErr_WarnEx(PyExc_RuntimeWarning, "vm_deallocate() failed", 2);
-    }
-    return NULL;
-}
-
-
-/*
- * Retrieve CPU frequency.
- */
-static PyObject *
-psutil_cpu_freq(PyObject *self, PyObject *args) {
-    int64_t curr;
-    int64_t min;
-    int64_t max;
-    size_t size = sizeof(int64_t);
-
-    if (sysctlbyname("hw.cpufrequency", &curr, &size, NULL, 0)) {
-        return PyErr_SetFromOSErrnoWithSyscall(
-            "sysctlbyname('hw.cpufrequency')");
-    }
-    if (sysctlbyname("hw.cpufrequency_min", &min, &size, NULL, 0)) {
-        return PyErr_SetFromOSErrnoWithSyscall(
-            "sysctlbyname('hw.cpufrequency_min')");
-    }
-    if (sysctlbyname("hw.cpufrequency_max", &max, &size, NULL, 0)) {
-        return PyErr_SetFromOSErrnoWithSyscall(
-            "sysctlbyname('hw.cpufrequency_max')");
-    }
-
-    return Py_BuildValue(
-        "KKK",
-        curr / 1000 / 1000,
-        min / 1000 / 1000,
-        max / 1000 / 1000);
-}
-
-
-/*
- * Return a Python float indicating the system boot time expressed in
- * seconds since the epoch.
- */
-static PyObject *
-psutil_boot_time(PyObject *self, PyObject *args) {
-    // fetch sysctl "kern.boottime"
-    static int request[2] = { CTL_KERN, KERN_BOOTTIME };
-    struct timeval result;
-    size_t result_len = sizeof result;
-    time_t boot_time = 0;
-
-    if (sysctl(request, 2, &result, &result_len, NULL, 0) == -1)
-        return PyErr_SetFromErrno(PyExc_OSError);
-    boot_time = result.tv_sec;
-    return Py_BuildValue("f", (float)boot_time);
-}
-
-
-/*
- * Return a list of tuples including device, mount point and fs type
- * for all partitions mounted on the system.
- */
-static PyObject *
-psutil_disk_partitions(PyObject *self, PyObject *args) {
-    int num;
-    int i;
-    int len;
-    uint64_t flags;
-    char opts[400];
-    struct statfs *fs = NULL;
-    PyObject *py_dev = NULL;
-    PyObject *py_mountp = NULL;
-    PyObject *py_tuple = NULL;
-    PyObject *py_retlist = PyList_New(0);
+#include "arch/osx/cpu.h"
+#include "arch/osx/disk.h"
+#include "arch/osx/mem.h"
+#include "arch/osx/net.h"
+#include "arch/osx/proc.h"
+#include "arch/osx/sensors.h"
+#include "arch/osx/sys.h"
 
-    if (py_retlist == NULL)
-        return NULL;
 
-    // get the number of mount points
-    Py_BEGIN_ALLOW_THREADS
-    num = getfsstat(NULL, 0, MNT_NOWAIT);
-    Py_END_ALLOW_THREADS
-    if (num == -1) {
-        PyErr_SetFromErrno(PyExc_OSError);
-        goto error;
-    }
-
-    len = sizeof(*fs) * num;
-    fs = malloc(len);
-    if (fs == NULL) {
-        PyErr_NoMemory();
-        goto error;
-    }
-
-    Py_BEGIN_ALLOW_THREADS
-    num = getfsstat(fs, len, MNT_NOWAIT);
-    Py_END_ALLOW_THREADS
-    if (num == -1) {
-        PyErr_SetFromErrno(PyExc_OSError);
-        goto error;
-    }
-
-    for (i = 0; i < num; i++) {
-        opts[0] = 0;
-        flags = fs[i].f_flags;
-
-        // see sys/mount.h
-        if (flags & MNT_RDONLY)
-            strlcat(opts, "ro", sizeof(opts));
-        else
-            strlcat(opts, "rw", sizeof(opts));
-        if (flags & MNT_SYNCHRONOUS)
-            strlcat(opts, ",sync", sizeof(opts));
-        if (flags & MNT_NOEXEC)
-            strlcat(opts, ",noexec", sizeof(opts));
-        if (flags & MNT_NOSUID)
-            strlcat(opts, ",nosuid", sizeof(opts));
-        if (flags & MNT_UNION)
-            strlcat(opts, ",union", sizeof(opts));
-        if (flags & MNT_ASYNC)
-            strlcat(opts, ",async", sizeof(opts));
-        if (flags & MNT_EXPORTED)
-            strlcat(opts, ",exported", sizeof(opts));
-        if (flags & MNT_QUARANTINE)
-            strlcat(opts, ",quarantine", sizeof(opts));
-        if (flags & MNT_LOCAL)
-            strlcat(opts, ",local", sizeof(opts));
-        if (flags & MNT_QUOTA)
-            strlcat(opts, ",quota", sizeof(opts));
-        if (flags & MNT_ROOTFS)
-            strlcat(opts, ",rootfs", sizeof(opts));
-        if (flags & MNT_DOVOLFS)
-            strlcat(opts, ",dovolfs", sizeof(opts));
-        if (flags & MNT_DONTBROWSE)
-            strlcat(opts, ",dontbrowse", sizeof(opts));
-        if (flags & MNT_IGNORE_OWNERSHIP)
-            strlcat(opts, ",ignore-ownership", sizeof(opts));
-        if (flags & MNT_AUTOMOUNTED)
-            strlcat(opts, ",automounted", sizeof(opts));
-        if (flags & MNT_JOURNALED)
-            strlcat(opts, ",journaled", sizeof(opts));
-        if (flags & MNT_NOUSERXATTR)
-            strlcat(opts, ",nouserxattr", sizeof(opts));
-        if (flags & MNT_DEFWRITE)
-            strlcat(opts, ",defwrite", sizeof(opts));
-        if (flags & MNT_MULTILABEL)
-            strlcat(opts, ",multilabel", sizeof(opts));
-        if (flags & MNT_NOATIME)
-            strlcat(opts, ",noatime", sizeof(opts));
-        if (flags & MNT_UPDATE)
-            strlcat(opts, ",update", sizeof(opts));
-        if (flags & MNT_RELOAD)
-            strlcat(opts, ",reload", sizeof(opts));
-        if (flags & MNT_FORCE)
-            strlcat(opts, ",force", sizeof(opts));
-        if (flags & MNT_CMDFLAGS)
-            strlcat(opts, ",cmdflags", sizeof(opts));
-
-        py_dev = PyUnicode_DecodeFSDefault(fs[i].f_mntfromname);
-        if (! py_dev)
-            goto error;
-        py_mountp = PyUnicode_DecodeFSDefault(fs[i].f_mntonname);
-        if (! py_mountp)
-            goto error;
-        py_tuple = Py_BuildValue(
-            "(OOss)",
-            py_dev,               // device
-            py_mountp,            // mount point
-            fs[i].f_fstypename,   // fs type
-            opts);                // options
-        if (!py_tuple)
-            goto error;
-        if (PyList_Append(py_retlist, py_tuple))
-            goto error;
-        Py_CLEAR(py_dev);
-        Py_CLEAR(py_mountp);
-        Py_CLEAR(py_tuple);
-    }
-
-    free(fs);
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_dev);
-    Py_XDECREF(py_mountp);
-    Py_XDECREF(py_tuple);
-    Py_DECREF(py_retlist);
-    if (fs != NULL)
-        free(fs);
-    return NULL;
-}
-
-
-/*
- * Return process threads
- */
-static PyObject *
-psutil_proc_threads(PyObject *self, PyObject *args) {
-    pid_t pid;
-    int err, ret;
-    kern_return_t kr;
-    unsigned int info_count = TASK_BASIC_INFO_COUNT;
-    mach_port_t task = MACH_PORT_NULL;
-    struct task_basic_info tasks_info;
-    thread_act_port_array_t thread_list = NULL;
-    thread_info_data_t thinfo_basic;
-    thread_basic_info_t basic_info_th;
-    mach_msg_type_number_t thread_count, thread_info_count, j;
-
-    PyObject *py_tuple = NULL;
-    PyObject *py_retlist = PyList_New(0);
-
-    if (py_retlist == NULL)
-        return NULL;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        goto error;
-
-    if (psutil_task_for_pid(pid, &task) != 0)
-        goto error;
-
-    info_count = TASK_BASIC_INFO_COUNT;
-    err = task_info(task, TASK_BASIC_INFO, (task_info_t)&tasks_info,
-                    &info_count);
-    if (err != KERN_SUCCESS) {
-        // errcode 4 is "invalid argument" (access denied)
-        if (err == 4) {
-            AccessDenied("task_info");
-        }
-        else {
-            // otherwise throw a runtime error with appropriate error code
-            PyErr_Format(PyExc_RuntimeError,
-                         "task_info(TASK_BASIC_INFO) syscall failed");
-        }
-        goto error;
-    }
-
-    err = task_threads(task, &thread_list, &thread_count);
-    if (err != KERN_SUCCESS) {
-        PyErr_Format(PyExc_RuntimeError, "task_threads() syscall failed");
-        goto error;
-    }
-
-    for (j = 0; j < thread_count; j++) {
-        thread_info_count = THREAD_INFO_MAX;
-        kr = thread_info(thread_list[j], THREAD_BASIC_INFO,
-                         (thread_info_t)thinfo_basic, &thread_info_count);
-        if (kr != KERN_SUCCESS) {
-            PyErr_Format(PyExc_RuntimeError,
-                         "thread_info(THREAD_BASIC_INFO) syscall failed");
-            goto error;
-        }
-
-        basic_info_th = (thread_basic_info_t)thinfo_basic;
-        py_tuple = Py_BuildValue(
-            "Iff",
-            j + 1,
-            basic_info_th->user_time.seconds + \
-                (float)basic_info_th->user_time.microseconds / 1000000.0,
-            basic_info_th->system_time.seconds + \
-                (float)basic_info_th->system_time.microseconds / 1000000.0
-        );
-        if (!py_tuple)
-            goto error;
-        if (PyList_Append(py_retlist, py_tuple))
-            goto error;
-        Py_CLEAR(py_tuple);
-    }
-
-    ret = vm_deallocate(task, (vm_address_t)thread_list,
-                        thread_count * sizeof(int));
-    if (ret != KERN_SUCCESS)
-        PyErr_WarnEx(PyExc_RuntimeWarning, "vm_deallocate() failed", 2);
-
-    mach_port_deallocate(mach_task_self(), task);
-
-    return py_retlist;
-
-error:
-    if (task != MACH_PORT_NULL)
-        mach_port_deallocate(mach_task_self(), task);
-    Py_XDECREF(py_tuple);
-    Py_DECREF(py_retlist);
-    if (thread_list != NULL) {
-        ret = vm_deallocate(task, (vm_address_t)thread_list,
-                            thread_count * sizeof(int));
-        if (ret != KERN_SUCCESS)
-            PyErr_WarnEx(PyExc_RuntimeWarning, "vm_deallocate() failed", 2);
-    }
-    return NULL;
-}
-
-
-/*
- * Return process open files as a Python tuple.
- * References:
- * - lsof source code: http://goo.gl/SYW79 and http://goo.gl/m78fd
- * - /usr/include/sys/proc_info.h
- */
-static PyObject *
-psutil_proc_open_files(PyObject *self, PyObject *args) {
-    pid_t pid;
-    int pidinfo_result;
-    int iterations;
-    int i;
-    unsigned long nb;
-
-    struct proc_fdinfo *fds_pointer = NULL;
-    struct proc_fdinfo *fdp_pointer;
-    struct vnode_fdinfowithpath vi;
-
-    PyObject *py_retlist = PyList_New(0);
-    PyObject *py_tuple = NULL;
-    PyObject *py_path = NULL;
-
-    if (py_retlist == NULL)
-        return NULL;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        goto error;
-
-    pidinfo_result = psutil_proc_pidinfo(pid, PROC_PIDLISTFDS, 0, NULL, 0);
-    if (pidinfo_result <= 0)
-        goto error;
-
-    fds_pointer = malloc(pidinfo_result);
-    if (fds_pointer == NULL) {
-        PyErr_NoMemory();
-        goto error;
-    }
-    pidinfo_result = psutil_proc_pidinfo(
-        pid, PROC_PIDLISTFDS, 0, fds_pointer, pidinfo_result);
-    if (pidinfo_result <= 0)
-        goto error;
-
-    iterations = (pidinfo_result / PROC_PIDLISTFD_SIZE);
-
-    for (i = 0; i < iterations; i++) {
-        fdp_pointer = &fds_pointer[i];
-
-        if (fdp_pointer->proc_fdtype == PROX_FDTYPE_VNODE) {
-            errno = 0;
-            nb = proc_pidfdinfo((pid_t)pid,
-                                fdp_pointer->proc_fd,
-                                PROC_PIDFDVNODEPATHINFO,
-                                &vi,
-                                sizeof(vi));
-
-            // --- errors checking
-            if ((nb <= 0) || nb < sizeof(vi)) {
-                if ((errno == ENOENT) || (errno == EBADF)) {
-                    // no such file or directory or bad file descriptor;
-                    // let's assume the file has been closed or removed
-                    continue;
-                }
-                else {
-                    psutil_raise_for_pid(
-                        pid, "proc_pidinfo(PROC_PIDFDVNODEPATHINFO)");
-                    goto error;
-                }
-            }
-            // --- /errors checking
-
-            // --- construct python list
-            py_path = PyUnicode_DecodeFSDefault(vi.pvip.vip_path);
-            if (! py_path)
-                goto error;
-            py_tuple = Py_BuildValue(
-                "(Oi)",
-                py_path,
-                (int)fdp_pointer->proc_fd);
-            if (!py_tuple)
-                goto error;
-            if (PyList_Append(py_retlist, py_tuple))
-                goto error;
-            Py_CLEAR(py_tuple);
-            Py_CLEAR(py_path);
-            // --- /construct python list
-        }
-    }
-
-    free(fds_pointer);
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_tuple);
-    Py_XDECREF(py_path);
-    Py_DECREF(py_retlist);
-    if (fds_pointer != NULL)
-        free(fds_pointer);
-    return NULL;  // exception has already been set earlier
-}
-
-
-/*
- * Return process TCP and UDP connections as a list of tuples.
- * Raises NSP in case of zombie process.
- * References:
- * - lsof source code: http://goo.gl/SYW79 and http://goo.gl/wNrC0
- * - /usr/include/sys/proc_info.h
- */
-static PyObject *
-psutil_proc_connections(PyObject *self, PyObject *args) {
-    pid_t pid;
-    int pidinfo_result;
-    int iterations;
-    int i;
-    unsigned long nb;
-
-    struct proc_fdinfo *fds_pointer = NULL;
-    struct proc_fdinfo *fdp_pointer;
-    struct socket_fdinfo si;
-
-    PyObject *py_retlist = PyList_New(0);
-    PyObject *py_tuple = NULL;
-    PyObject *py_laddr = NULL;
-    PyObject *py_raddr = NULL;
-    PyObject *py_af_filter = NULL;
-    PyObject *py_type_filter = NULL;
-
-    if (py_retlist == NULL)
-        return NULL;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "OO", &pid, &py_af_filter,
-                           &py_type_filter)) {
-        goto error;
-    }
-
-    if (!PySequence_Check(py_af_filter) || !PySequence_Check(py_type_filter)) {
-        PyErr_SetString(PyExc_TypeError, "arg 2 or 3 is not a sequence");
-        goto error;
-    }
-
-    if (pid == 0)
-        return py_retlist;
-    pidinfo_result = psutil_proc_pidinfo(pid, PROC_PIDLISTFDS, 0, NULL, 0);
-    if (pidinfo_result <= 0)
-        goto error;
-
-    fds_pointer = malloc(pidinfo_result);
-    if (fds_pointer == NULL) {
-        PyErr_NoMemory();
-        goto error;
-    }
-
-    pidinfo_result = psutil_proc_pidinfo(
-        pid, PROC_PIDLISTFDS, 0, fds_pointer, pidinfo_result);
-    if (pidinfo_result <= 0)
-        goto error;
-
-    iterations = (pidinfo_result / PROC_PIDLISTFD_SIZE);
-    for (i = 0; i < iterations; i++) {
-        py_tuple = NULL;
-        py_laddr = NULL;
-        py_raddr = NULL;
-        fdp_pointer = &fds_pointer[i];
-
-        if (fdp_pointer->proc_fdtype == PROX_FDTYPE_SOCKET) {
-            errno = 0;
-            nb = proc_pidfdinfo(pid, fdp_pointer->proc_fd,
-                                PROC_PIDFDSOCKETINFO, &si, sizeof(si));
-
-            // --- errors checking
-            if ((nb <= 0) || (nb < sizeof(si))) {
-                if (errno == EBADF) {
-                    // let's assume socket has been closed
-                    continue;
-                }
-                else {
-                    psutil_raise_for_pid(
-                        pid, "proc_pidinfo(PROC_PIDFDSOCKETINFO)");
-                    goto error;
-                }
-            }
-            // --- /errors checking
-
-            //
-            int fd, family, type, lport, rport, state;
-            char lip[200], rip[200];
-            int inseq;
-            PyObject *py_family;
-            PyObject *py_type;
-
-            fd = (int)fdp_pointer->proc_fd;
-            family = si.psi.soi_family;
-            type = si.psi.soi_type;
-
-            // apply filters
-            py_family = PyLong_FromLong((long)family);
-            inseq = PySequence_Contains(py_af_filter, py_family);
-            Py_DECREF(py_family);
-            if (inseq == 0)
-                continue;
-            py_type = PyLong_FromLong((long)type);
-            inseq = PySequence_Contains(py_type_filter, py_type);
-            Py_DECREF(py_type);
-            if (inseq == 0)
-                continue;
-
-            if (errno != 0) {
-                PyErr_SetFromErrno(PyExc_OSError);
-                goto error;
-            }
-
-            if ((family == AF_INET) || (family == AF_INET6)) {
-                if (family == AF_INET) {
-                    inet_ntop(AF_INET,
-                              &si.psi.soi_proto.pri_tcp.tcpsi_ini. \
-                                  insi_laddr.ina_46.i46a_addr4,
-                              lip,
-                              sizeof(lip));
-                    inet_ntop(AF_INET,
-                              &si.psi.soi_proto.pri_tcp.tcpsi_ini.insi_faddr. \
-                                  ina_46.i46a_addr4,
-                              rip,
-                              sizeof(rip));
-                }
-                else {
-                    inet_ntop(AF_INET6,
-                              &si.psi.soi_proto.pri_tcp.tcpsi_ini. \
-                                  insi_laddr.ina_6,
-                              lip, sizeof(lip));
-                    inet_ntop(AF_INET6,
-                              &si.psi.soi_proto.pri_tcp.tcpsi_ini. \
-                                  insi_faddr.ina_6,
-                              rip, sizeof(rip));
-                }
-
-                // check for inet_ntop failures
-                if (errno != 0) {
-                    PyErr_SetFromOSErrnoWithSyscall("inet_ntop()");
-                    goto error;
-                }
-
-                lport = ntohs(si.psi.soi_proto.pri_tcp.tcpsi_ini.insi_lport);
-                rport = ntohs(si.psi.soi_proto.pri_tcp.tcpsi_ini.insi_fport);
-                if (type == SOCK_STREAM)
-                    state = (int)si.psi.soi_proto.pri_tcp.tcpsi_state;
-                else
-                    state = PSUTIL_CONN_NONE;
-
-                py_laddr = Py_BuildValue("(si)", lip, lport);
-                if (!py_laddr)
-                    goto error;
-                if (rport != 0)
-                    py_raddr = Py_BuildValue("(si)", rip, rport);
-                else
-                    py_raddr = Py_BuildValue("()");
-                if (!py_raddr)
-                    goto error;
-
-                // construct the python list
-                py_tuple = Py_BuildValue(
-                    "(iiiNNi)", fd, family, type, py_laddr, py_raddr, state);
-                if (!py_tuple)
-                    goto error;
-                if (PyList_Append(py_retlist, py_tuple))
-                    goto error;
-                Py_CLEAR(py_tuple);
-            }
-            else if (family == AF_UNIX) {
-                py_laddr = PyUnicode_DecodeFSDefault(
-                    si.psi.soi_proto.pri_un.unsi_addr.ua_sun.sun_path);
-                if (!py_laddr)
-                    goto error;
-                py_raddr = PyUnicode_DecodeFSDefault(
-                    si.psi.soi_proto.pri_un.unsi_caddr.ua_sun.sun_path);
-                if (!py_raddr)
-                    goto error;
-                // construct the python list
-                py_tuple = Py_BuildValue(
-                    "(iiiOOi)",
-                    fd, family, type,
-                    py_laddr,
-                    py_raddr,
-                    PSUTIL_CONN_NONE);
-                if (!py_tuple)
-                    goto error;
-                if (PyList_Append(py_retlist, py_tuple))
-                    goto error;
-                Py_CLEAR(py_tuple);
-                Py_CLEAR(py_laddr);
-                Py_CLEAR(py_raddr);
-            }
-        }
-    }
-
-    free(fds_pointer);
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_tuple);
-    Py_XDECREF(py_laddr);
-    Py_XDECREF(py_raddr);
-    Py_DECREF(py_retlist);
-    if (fds_pointer != NULL)
-        free(fds_pointer);
-    return NULL;
-}
-
-
-/*
- * Return number of file descriptors opened by process.
- * Raises NSP in case of zombie process.
- */
-static PyObject *
-psutil_proc_num_fds(PyObject *self, PyObject *args) {
-    pid_t pid;
-    int pidinfo_result;
-    int num;
-    struct proc_fdinfo *fds_pointer;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    pidinfo_result = proc_pidinfo(pid, PROC_PIDLISTFDS, 0, NULL, 0);
-    if (pidinfo_result <= 0)
-        return PyErr_SetFromErrno(PyExc_OSError);
-
-    fds_pointer = malloc(pidinfo_result);
-    if (fds_pointer == NULL)
-        return PyErr_NoMemory();
-    pidinfo_result = proc_pidinfo(pid, PROC_PIDLISTFDS, 0, fds_pointer,
-                                  pidinfo_result);
-    if (pidinfo_result <= 0) {
-        free(fds_pointer);
-        return PyErr_SetFromErrno(PyExc_OSError);
-    }
-
-    num = (pidinfo_result / PROC_PIDLISTFD_SIZE);
-    free(fds_pointer);
-    return Py_BuildValue("i", num);
-}
-
-
-/*
- * Return a Python list of named tuples with overall network I/O information
- */
-static PyObject *
-psutil_net_io_counters(PyObject *self, PyObject *args) {
-    char *buf = NULL, *lim, *next;
-    struct if_msghdr *ifm;
-    int mib[6];
-    mib[0] = CTL_NET;          // networking subsystem
-    mib[1] = PF_ROUTE;         // type of information
-    mib[2] = 0;                // protocol (IPPROTO_xxx)
-    mib[3] = 0;                // address family
-    mib[4] = NET_RT_IFLIST2;   // operation
-    mib[5] = 0;
-    size_t len;
-    PyObject *py_ifc_info = NULL;
-    PyObject *py_retdict = PyDict_New();
-
-    if (py_retdict == NULL)
-        return NULL;
-
-    if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
-        PyErr_SetFromErrno(PyExc_OSError);
-        goto error;
-    }
-
-    buf = malloc(len);
-    if (buf == NULL) {
-        PyErr_NoMemory();
-        goto error;
-    }
-
-    if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
-        PyErr_SetFromErrno(PyExc_OSError);
-        goto error;
-    }
-
-    lim = buf + len;
-
-    for (next = buf; next < lim; ) {
-        ifm = (struct if_msghdr *)next;
-        next += ifm->ifm_msglen;
-
-        if (ifm->ifm_type == RTM_IFINFO2) {
-            py_ifc_info = NULL;
-            struct if_msghdr2 *if2m = (struct if_msghdr2 *)ifm;
-            struct sockaddr_dl *sdl = (struct sockaddr_dl *)(if2m + 1);
-            char ifc_name[32];
-
-            strncpy(ifc_name, sdl->sdl_data, sdl->sdl_nlen);
-            ifc_name[sdl->sdl_nlen] = 0;
-
-            py_ifc_info = Py_BuildValue(
-                "(KKKKKKKi)",
-                if2m->ifm_data.ifi_obytes,
-                if2m->ifm_data.ifi_ibytes,
-                if2m->ifm_data.ifi_opackets,
-                if2m->ifm_data.ifi_ipackets,
-                if2m->ifm_data.ifi_ierrors,
-                if2m->ifm_data.ifi_oerrors,
-                if2m->ifm_data.ifi_iqdrops,
-                0);  // dropout not supported
-
-            if (!py_ifc_info)
-                goto error;
-            if (PyDict_SetItemString(py_retdict, ifc_name, py_ifc_info))
-                goto error;
-            Py_CLEAR(py_ifc_info);
-        }
-        else {
-            continue;
-        }
-    }
-
-    free(buf);
-    return py_retdict;
-
-error:
-    Py_XDECREF(py_ifc_info);
-    Py_DECREF(py_retdict);
-    if (buf != NULL)
-        free(buf);
-    return NULL;
-}
-
-
-/*
- * Return a Python dict of tuples for disk I/O information
- */
-static PyObject *
-psutil_disk_io_counters(PyObject *self, PyObject *args) {
-    CFDictionaryRef parent_dict;
-    CFDictionaryRef props_dict;
-    CFDictionaryRef stats_dict;
-    io_registry_entry_t parent;
-    io_registry_entry_t disk;
-    io_iterator_t disk_list;
-    PyObject *py_disk_info = NULL;
-    PyObject *py_retdict = PyDict_New();
-
-    if (py_retdict == NULL)
-        return NULL;
-
-    // Get list of disks
-    if (IOServiceGetMatchingServices(kIOMasterPortDefault,
-                                     IOServiceMatching(kIOMediaClass),
-                                     &disk_list) != kIOReturnSuccess) {
-        PyErr_SetString(
-            PyExc_RuntimeError, "unable to get the list of disks.");
-        goto error;
-    }
-
-    // Iterate over disks
-    while ((disk = IOIteratorNext(disk_list)) != 0) {
-        py_disk_info = NULL;
-        parent_dict = NULL;
-        props_dict = NULL;
-        stats_dict = NULL;
-
-        if (IORegistryEntryGetParentEntry(disk, kIOServicePlane, &parent)
-                != kIOReturnSuccess) {
-            PyErr_SetString(PyExc_RuntimeError,
-                            "unable to get the disk's parent.");
-            IOObjectRelease(disk);
-            goto error;
-        }
-
-        if (IOObjectConformsTo(parent, "IOBlockStorageDriver")) {
-            if (IORegistryEntryCreateCFProperties(
-                    disk,
-                    (CFMutableDictionaryRef *) &parent_dict,
-                    kCFAllocatorDefault,
-                    kNilOptions
-                ) != kIOReturnSuccess)
-            {
-                PyErr_SetString(PyExc_RuntimeError,
-                                "unable to get the parent's properties.");
-                IOObjectRelease(disk);
-                IOObjectRelease(parent);
-                goto error;
-            }
-
-            if (IORegistryEntryCreateCFProperties(
-                    parent,
-                    (CFMutableDictionaryRef *) &props_dict,
-                    kCFAllocatorDefault,
-                    kNilOptions
-                ) != kIOReturnSuccess)
-            {
-                PyErr_SetString(PyExc_RuntimeError,
-                                "unable to get the disk properties.");
-                CFRelease(props_dict);
-                IOObjectRelease(disk);
-                IOObjectRelease(parent);
-                goto error;
-            }
-
-            const int kMaxDiskNameSize = 64;
-            CFStringRef disk_name_ref = (CFStringRef)CFDictionaryGetValue(
-                parent_dict, CFSTR(kIOBSDNameKey));
-            char disk_name[kMaxDiskNameSize];
-
-            CFStringGetCString(disk_name_ref,
-                               disk_name,
-                               kMaxDiskNameSize,
-                               CFStringGetSystemEncoding());
-
-            stats_dict = (CFDictionaryRef)CFDictionaryGetValue(
-                props_dict, CFSTR(kIOBlockStorageDriverStatisticsKey));
-
-            if (stats_dict == NULL) {
-                PyErr_SetString(PyExc_RuntimeError,
-                                "Unable to get disk stats.");
-                goto error;
-            }
-
-            CFNumberRef number;
-            int64_t reads = 0;
-            int64_t writes = 0;
-            int64_t read_bytes = 0;
-            int64_t write_bytes = 0;
-            int64_t read_time = 0;
-            int64_t write_time = 0;
-
-            // Get disk reads/writes
-            if ((number = (CFNumberRef)CFDictionaryGetValue(
-                    stats_dict,
-                    CFSTR(kIOBlockStorageDriverStatisticsReadsKey))))
-            {
-                CFNumberGetValue(number, kCFNumberSInt64Type, &reads);
-            }
-            if ((number = (CFNumberRef)CFDictionaryGetValue(
-                    stats_dict,
-                    CFSTR(kIOBlockStorageDriverStatisticsWritesKey))))
-            {
-                CFNumberGetValue(number, kCFNumberSInt64Type, &writes);
-            }
-
-            // Get disk bytes read/written
-            if ((number = (CFNumberRef)CFDictionaryGetValue(
-                    stats_dict,
-                    CFSTR(kIOBlockStorageDriverStatisticsBytesReadKey))))
-            {
-                CFNumberGetValue(number, kCFNumberSInt64Type, &read_bytes);
-            }
-            if ((number = (CFNumberRef)CFDictionaryGetValue(
-                    stats_dict,
-                    CFSTR(kIOBlockStorageDriverStatisticsBytesWrittenKey))))
-            {
-                CFNumberGetValue(number, kCFNumberSInt64Type, &write_bytes);
-            }
-
-            // Get disk time spent reading/writing (nanoseconds)
-            if ((number = (CFNumberRef)CFDictionaryGetValue(
-                    stats_dict,
-                    CFSTR(kIOBlockStorageDriverStatisticsTotalReadTimeKey))))
-            {
-                CFNumberGetValue(number, kCFNumberSInt64Type, &read_time);
-            }
-            if ((number = (CFNumberRef)CFDictionaryGetValue(
-                    stats_dict,
-                    CFSTR(kIOBlockStorageDriverStatisticsTotalWriteTimeKey))))
-            {
-                CFNumberGetValue(number, kCFNumberSInt64Type, &write_time);
-            }
-
-            // Read/Write time on macOS comes back in nanoseconds and in psutil
-            // we've standardized on milliseconds so do the conversion.
-            py_disk_info = Py_BuildValue(
-                "(KKKKKK)",
-                reads,
-                writes,
-                read_bytes,
-                write_bytes,
-                read_time / 1000 / 1000,
-                write_time / 1000 / 1000);
-           if (!py_disk_info)
-                goto error;
-            if (PyDict_SetItemString(py_retdict, disk_name, py_disk_info))
-                goto error;
-            Py_CLEAR(py_disk_info);
-
-            CFRelease(parent_dict);
-            IOObjectRelease(parent);
-            CFRelease(props_dict);
-            IOObjectRelease(disk);
-        }
-    }
-
-    IOObjectRelease (disk_list);
-
-    return py_retdict;
-
-error:
-    Py_XDECREF(py_disk_info);
-    Py_DECREF(py_retdict);
-    return NULL;
-}
-
-
-/*
- * Return currently connected users as a list of tuples.
- */
-static PyObject *
-psutil_users(PyObject *self, PyObject *args) {
-    struct utmpx *utx;
-    PyObject *py_username = NULL;
-    PyObject *py_tty = NULL;
-    PyObject *py_hostname = NULL;
-    PyObject *py_tuple = NULL;
-    PyObject *py_retlist = PyList_New(0);
-
-    if (py_retlist == NULL)
-        return NULL;
-    while ((utx = getutxent()) != NULL) {
-        if (utx->ut_type != USER_PROCESS)
-            continue;
-        py_username = PyUnicode_DecodeFSDefault(utx->ut_user);
-        if (! py_username)
-            goto error;
-        py_tty = PyUnicode_DecodeFSDefault(utx->ut_line);
-        if (! py_tty)
-            goto error;
-        py_hostname = PyUnicode_DecodeFSDefault(utx->ut_host);
-        if (! py_hostname)
-            goto error;
-        py_tuple = Py_BuildValue(
-            "(OOOfi)",
-            py_username,              // username
-            py_tty,                   // tty
-            py_hostname,              // hostname
-            (float)utx->ut_tv.tv_sec, // start time
-            utx->ut_pid               // process id
-        );
-        if (!py_tuple) {
-            endutxent();
-            goto error;
-        }
-        if (PyList_Append(py_retlist, py_tuple)) {
-            endutxent();
-            goto error;
-        }
-        Py_CLEAR(py_username);
-        Py_CLEAR(py_tty);
-        Py_CLEAR(py_hostname);
-        Py_CLEAR(py_tuple);
-    }
-
-    endutxent();
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_username);
-    Py_XDECREF(py_tty);
-    Py_XDECREF(py_hostname);
-    Py_XDECREF(py_tuple);
-    Py_DECREF(py_retlist);
-    return NULL;
-}
-
-
-/*
- * Return CPU statistics.
- */
-static PyObject *
-psutil_cpu_stats(PyObject *self, PyObject *args) {
-    struct vmmeter vmstat;
-    kern_return_t ret;
-    mach_msg_type_number_t count = sizeof(vmstat) / sizeof(integer_t);
-    mach_port_t mport = mach_host_self();
-
-    ret = host_statistics(mport, HOST_VM_INFO, (host_info_t)&vmstat, &count);
-    if (ret != KERN_SUCCESS) {
-        PyErr_Format(
-            PyExc_RuntimeError,
-            "host_statistics(HOST_VM_INFO) failed: %s",
-            mach_error_string(ret));
-        return NULL;
-    }
-    mach_port_deallocate(mach_task_self(), mport);
-
-    return Py_BuildValue(
-        "IIIII",
-        vmstat.v_swtch,  // ctx switches
-        vmstat.v_intr,  // interrupts
-        vmstat.v_soft,  // software interrupts
-        vmstat.v_syscall,  // syscalls
-        vmstat.v_trap  // traps
-    );
-}
-
-
-/*
- * Return battery information.
- */
-static PyObject *
-psutil_sensors_battery(PyObject *self, PyObject *args) {
-    PyObject *py_tuple = NULL;
-    CFTypeRef power_info = NULL;
-    CFArrayRef power_sources_list = NULL;
-    CFDictionaryRef power_sources_information = NULL;
-    CFNumberRef capacity_ref = NULL;
-    CFNumberRef time_to_empty_ref = NULL;
-    CFStringRef ps_state_ref = NULL;
-    uint32_t capacity;     /* units are percent */
-    int time_to_empty;     /* units are minutes */
-    int is_power_plugged;
-
-    power_info = IOPSCopyPowerSourcesInfo();
-
-    if (!power_info) {
-        PyErr_SetString(PyExc_RuntimeError,
-            "IOPSCopyPowerSourcesInfo() syscall failed");
-        goto error;
-    }
-
-    power_sources_list = IOPSCopyPowerSourcesList(power_info);
-    if (!power_sources_list) {
-        PyErr_SetString(PyExc_RuntimeError,
-            "IOPSCopyPowerSourcesList() syscall failed");
-        goto error;
-    }
-
-    /* Should only get one source. But in practice, check for > 0 sources */
-    if (!CFArrayGetCount(power_sources_list)) {
-        PyErr_SetString(PyExc_NotImplementedError, "no battery");
-        goto error;
-    }
-
-    power_sources_information = IOPSGetPowerSourceDescription(
-        power_info, CFArrayGetValueAtIndex(power_sources_list, 0));
-
-    capacity_ref = (CFNumberRef)  CFDictionaryGetValue(
-        power_sources_information, CFSTR(kIOPSCurrentCapacityKey));
-    if (!CFNumberGetValue(capacity_ref, kCFNumberSInt32Type, &capacity)) {
-        PyErr_SetString(PyExc_RuntimeError,
-            "No battery capacity infomration in power sources info");
-        goto error;
-    }
-
-    ps_state_ref = (CFStringRef) CFDictionaryGetValue(
-        power_sources_information, CFSTR(kIOPSPowerSourceStateKey));
-    is_power_plugged = CFStringCompare(
-        ps_state_ref, CFSTR(kIOPSACPowerValue), 0)
-        == kCFCompareEqualTo;
-
-    time_to_empty_ref = (CFNumberRef) CFDictionaryGetValue(
-        power_sources_information, CFSTR(kIOPSTimeToEmptyKey));
-    if (!CFNumberGetValue(time_to_empty_ref,
-                          kCFNumberIntType, &time_to_empty)) {
-        /* This value is recommended for non-Apple power sources, so it's not
-         * an error if it doesn't exist. We'll return -1 for "unknown" */
-        /* A value of -1 indicates "Still Calculating the Time" also for
-         * apple power source */
-        time_to_empty = -1;
-    }
-
-    py_tuple = Py_BuildValue("Iii",
-        capacity, time_to_empty, is_power_plugged);
-    if (!py_tuple) {
-        goto error;
-    }
-
-    CFRelease(power_info);
-    CFRelease(power_sources_list);
-    /* Caller should NOT release power_sources_information */
-
-    return py_tuple;
-
-error:
-    if (power_info)
-        CFRelease(power_info);
-    if (power_sources_list)
-        CFRelease(power_sources_list);
-    Py_XDECREF(py_tuple);
-    return NULL;
-}
-
-
-/*
- * define the psutil C module methods and initialize the module.
- */
 static PyMethodDef mod_methods[] = {
     // --- per-process functions
-
-    {"proc_kinfo_oneshot", psutil_proc_kinfo_oneshot, METH_VARARGS,
-     "Return multiple process info."},
-    {"proc_pidtaskinfo_oneshot", psutil_proc_pidtaskinfo_oneshot, METH_VARARGS,
-     "Return multiple process info."},
-    {"proc_name", psutil_proc_name, METH_VARARGS,
-     "Return process name"},
-    {"proc_cmdline", psutil_proc_cmdline, METH_VARARGS,
-     "Return process cmdline as a list of cmdline arguments"},
-    {"proc_environ", psutil_proc_environ, METH_VARARGS,
-     "Return process environment data"},
-    {"proc_exe", psutil_proc_exe, METH_VARARGS,
-     "Return path of the process executable"},
-    {"proc_cwd", psutil_proc_cwd, METH_VARARGS,
-     "Return process current working directory."},
-    {"proc_memory_uss", psutil_proc_memory_uss, METH_VARARGS,
-     "Return process USS memory"},
-    {"proc_threads", psutil_proc_threads, METH_VARARGS,
-     "Return process threads as a list of tuples"},
-    {"proc_open_files", psutil_proc_open_files, METH_VARARGS,
-     "Return files opened by process as a list of tuples"},
-    {"proc_num_fds", psutil_proc_num_fds, METH_VARARGS,
-     "Return the number of fds opened by process."},
-    {"proc_connections", psutil_proc_connections, METH_VARARGS,
-     "Get process TCP and UDP connections as a list of tuples"},
+    {"proc_cmdline", psutil_proc_cmdline, METH_VARARGS},
+    {"proc_connections", psutil_proc_connections, METH_VARARGS},
+    {"proc_cwd", psutil_proc_cwd, METH_VARARGS},
+    {"proc_environ", psutil_proc_environ, METH_VARARGS},
+    {"proc_exe", psutil_proc_exe, METH_VARARGS},
+    {"proc_kinfo_oneshot", psutil_proc_kinfo_oneshot, METH_VARARGS},
+    {"proc_memory_uss", psutil_proc_memory_uss, METH_VARARGS},
+    {"proc_name", psutil_proc_name, METH_VARARGS},
+    {"proc_num_fds", psutil_proc_num_fds, METH_VARARGS},
+    {"proc_open_files", psutil_proc_open_files, METH_VARARGS},
+    {"proc_pidtaskinfo_oneshot", psutil_proc_pidtaskinfo_oneshot, METH_VARARGS},
+    {"proc_threads", psutil_proc_threads, METH_VARARGS},
 
     // --- system-related functions
-
-    {"pids", psutil_pids, METH_VARARGS,
-     "Returns a list of PIDs currently running on the system"},
-    {"cpu_count_logical", psutil_cpu_count_logical, METH_VARARGS,
-     "Return number of logical CPUs on the system"},
-    {"cpu_count_phys", psutil_cpu_count_phys, METH_VARARGS,
-     "Return number of physical CPUs on the system"},
-    {"virtual_mem", psutil_virtual_mem, METH_VARARGS,
-     "Return system virtual memory stats"},
-    {"swap_mem", psutil_swap_mem, METH_VARARGS,
-     "Return stats about swap memory, in bytes"},
-    {"cpu_times", psutil_cpu_times, METH_VARARGS,
-     "Return system cpu times as a tuple (user, system, nice, idle, irc)"},
-    {"per_cpu_times", psutil_per_cpu_times, METH_VARARGS,
-     "Return system per-cpu times as a list of tuples"},
-    {"cpu_freq", psutil_cpu_freq, METH_VARARGS,
-     "Return cpu current frequency"},
-    {"boot_time", psutil_boot_time, METH_VARARGS,
-     "Return the system boot time expressed in seconds since the epoch."},
-    {"disk_partitions", psutil_disk_partitions, METH_VARARGS,
-     "Return a list of tuples including device, mount point and "
-     "fs type for all partitions mounted on the system."},
-    {"net_io_counters", psutil_net_io_counters, METH_VARARGS,
-     "Return dict of tuples of networks I/O information."},
-    {"disk_io_counters", psutil_disk_io_counters, METH_VARARGS,
-     "Return dict of tuples of disks I/O information."},
-    {"users", psutil_users, METH_VARARGS,
-     "Return currently connected users as a list of tuples"},
-    {"cpu_stats", psutil_cpu_stats, METH_VARARGS,
-     "Return CPU statistics"},
-    {"sensors_battery", psutil_sensors_battery, METH_VARARGS,
-     "Return battery information."},
+    {"boot_time", psutil_boot_time, METH_VARARGS},
+    {"cpu_count_cores", psutil_cpu_count_cores, METH_VARARGS},
+    {"cpu_count_logical", psutil_cpu_count_logical, METH_VARARGS},
+    {"cpu_freq", psutil_cpu_freq, METH_VARARGS},
+    {"cpu_stats", psutil_cpu_stats, METH_VARARGS},
+    {"cpu_times", psutil_cpu_times, METH_VARARGS},
+    {"disk_io_counters", psutil_disk_io_counters, METH_VARARGS},
+    {"disk_partitions", psutil_disk_partitions, METH_VARARGS},
+    {"disk_usage_used", psutil_disk_usage_used, METH_VARARGS},
+    {"net_io_counters", psutil_net_io_counters, METH_VARARGS},
+    {"per_cpu_times", psutil_per_cpu_times, METH_VARARGS},
+    {"pids", psutil_pids, METH_VARARGS},
+    {"sensors_battery", psutil_sensors_battery, METH_VARARGS},
+    {"swap_mem", psutil_swap_mem, METH_VARARGS},
+    {"users", psutil_users, METH_VARARGS},
+    {"virtual_mem", psutil_virtual_mem, METH_VARARGS},
 
     // --- others
-    {"set_testing", psutil_set_testing, METH_NOARGS,
-     "Set psutil in testing mode"},
+    {"check_pid_range", psutil_check_pid_range, METH_VARARGS},
+    {"set_debug", psutil_set_debug, METH_VARARGS},
 
     {NULL, NULL, 0, NULL}
 };
@@ -1895,17 +134,6 @@ static PyMethodDef mod_methods[] = {
     if (PyModule_AddIntConstant(mod, "PSUTIL_CONN_NONE", PSUTIL_CONN_NONE))
         INITERR;
 
-    // Exception.
-    ZombieProcessError = PyErr_NewException(
-        "_psutil_osx.ZombieProcessError", NULL, NULL);
-    if (ZombieProcessError == NULL)
-        INITERR;
-    Py_INCREF(ZombieProcessError);
-    if (PyModule_AddObject(mod, "ZombieProcessError", ZombieProcessError)) {
-        Py_DECREF(ZombieProcessError);
-        INITERR;
-    }
-
     if (mod == NULL)
         INITERR;
 #if PY_MAJOR_VERSION >= 3
diff --git a/contrib/python/psutil/py3/psutil/_psutil_posix.c b/contrib/python/psutil/py3/psutil/_psutil_posix.c
index 3447fc9017..ad0d4b17ee 100644
--- a/contrib/python/psutil/py3/psutil/_psutil_posix.c
+++ b/contrib/python/psutil/py3/psutil/_psutil_posix.c
@@ -147,7 +147,7 @@ psutil_pid_exists(pid_t pid) {
  */
 void
 psutil_raise_for_pid(long pid, char *syscall) {
-    if (errno != 0)  // unlikely
+    if (errno != 0)
         PyErr_SetFromOSErrnoWithSyscall(syscall);
     else if (psutil_pid_exists(pid) == 0)
         NoSuchProcess(syscall);
@@ -429,6 +429,210 @@ error:
     return PyErr_SetFromErrno(PyExc_OSError);
 }
 
+static int
+append_flag(PyObject *py_retlist, const char * flag_name)
+{
+    PyObject *py_str = NULL;
+
+#if PY_MAJOR_VERSION >= 3
+    py_str = PyUnicode_FromString(flag_name);
+#else
+    py_str = PyString_FromString(flag_name);
+#endif
+    if (! py_str)
+        return 0;
+    if (PyList_Append(py_retlist, py_str)) {
+        Py_DECREF(py_str);
+        return 0;
+    }
+    Py_CLEAR(py_str);
+
+    return 1;
+}
+
+/*
+ * Get all of the NIC flags and return them.
+ */
+static PyObject *
+psutil_net_if_flags(PyObject *self, PyObject *args) {
+    char *nic_name;
+    int sock = -1;
+    int ret;
+    struct ifreq ifr;
+    PyObject *py_retlist = PyList_New(0);
+    short int flags;
+
+    if (py_retlist == NULL)
+        return NULL;
+
+    if (! PyArg_ParseTuple(args, "s", &nic_name))
+        goto error;
+
+    sock = socket(AF_INET, SOCK_DGRAM, 0);
+    if (sock == -1) {
+        PyErr_SetFromOSErrnoWithSyscall("socket(SOCK_DGRAM)");
+        goto error;
+    }
+
+    PSUTIL_STRNCPY(ifr.ifr_name, nic_name, sizeof(ifr.ifr_name));
+    ret = ioctl(sock, SIOCGIFFLAGS, &ifr);
+    if (ret == -1) {
+        PyErr_SetFromOSErrnoWithSyscall("ioctl(SIOCGIFFLAGS)");
+        goto error;
+    }
+
+    close(sock);
+    sock = -1;
+
+    flags = ifr.ifr_flags & 0xFFFF;
+
+    // Linux/glibc IFF flags: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/gnu/net/if.h;h=251418f82331c0426e58707fe4473d454893b132;hb=HEAD
+    // macOS IFF flags: https://opensource.apple.com/source/xnu/xnu-792/bsd/net/if.h.auto.html
+    // AIX IFF flags: https://www.ibm.com/support/pages/how-hexadecimal-flags-displayed-ifconfig-are-calculated
+    // FreeBSD IFF flags: https://www.freebsd.org/cgi/man.cgi?query=if_allmulti&apropos=0&sektion=0&manpath=FreeBSD+10-current&format=html
+
+#ifdef IFF_UP
+    // Available in (at least) Linux, macOS, AIX, BSD
+    if (flags & IFF_UP)
+        if (!append_flag(py_retlist, "up"))
+            goto error;
+#endif
+#ifdef IFF_BROADCAST
+    // Available in (at least) Linux, macOS, AIX, BSD
+    if (flags & IFF_BROADCAST)
+        if (!append_flag(py_retlist, "broadcast"))
+            goto error;
+#endif
+#ifdef IFF_DEBUG
+    // Available in (at least) Linux, macOS, BSD
+    if (flags & IFF_DEBUG)
+        if (!append_flag(py_retlist, "debug"))
+            goto error;
+#endif
+#ifdef IFF_LOOPBACK
+    // Available in (at least) Linux, macOS, BSD
+    if (flags & IFF_LOOPBACK)
+        if (!append_flag(py_retlist, "loopback"))
+            goto error;
+#endif
+#ifdef IFF_POINTOPOINT
+    // Available in (at least) Linux, macOS, BSD
+    if (flags & IFF_POINTOPOINT)
+        if (!append_flag(py_retlist, "pointopoint"))
+            goto error;
+#endif
+#ifdef IFF_NOTRAILERS
+    // Available in (at least) Linux, macOS, AIX
+    if (flags & IFF_NOTRAILERS)
+        if (!append_flag(py_retlist, "notrailers"))
+            goto error;
+#endif
+#ifdef IFF_RUNNING
+    // Available in (at least) Linux, macOS, AIX, BSD
+    if (flags & IFF_RUNNING)
+        if (!append_flag(py_retlist, "running"))
+            goto error;
+#endif
+#ifdef IFF_NOARP
+    // Available in (at least) Linux, macOS, BSD
+    if (flags & IFF_NOARP)
+        if (!append_flag(py_retlist, "noarp"))
+            goto error;
+#endif
+#ifdef IFF_PROMISC
+    // Available in (at least) Linux, macOS, BSD
+    if (flags & IFF_PROMISC)
+        if (!append_flag(py_retlist, "promisc"))
+            goto error;
+#endif
+#ifdef IFF_ALLMULTI
+    // Available in (at least) Linux, macOS, BSD
+    if (flags & IFF_ALLMULTI)
+        if (!append_flag(py_retlist, "allmulti"))
+            goto error;
+#endif
+#ifdef IFF_MASTER
+    // Available in (at least) Linux
+    if (flags & IFF_MASTER)
+        if (!append_flag(py_retlist, "master"))
+            goto error;
+#endif
+#ifdef IFF_SLAVE
+    // Available in (at least) Linux
+    if (flags & IFF_SLAVE)
+        if (!append_flag(py_retlist, "slave"))
+            goto error;
+#endif
+#ifdef IFF_MULTICAST
+    // Available in (at least) Linux, macOS, BSD
+    if (flags & IFF_MULTICAST)
+        if (!append_flag(py_retlist, "multicast"))
+            goto error;
+#endif
+#ifdef IFF_PORTSEL
+    // Available in (at least) Linux
+    if (flags & IFF_PORTSEL)
+        if (!append_flag(py_retlist, "portsel"))
+            goto error;
+#endif
+#ifdef IFF_AUTOMEDIA
+    // Available in (at least) Linux
+    if (flags & IFF_AUTOMEDIA)
+        if (!append_flag(py_retlist, "automedia"))
+            goto error;
+#endif
+#ifdef IFF_DYNAMIC
+    // Available in (at least) Linux
+    if (flags & IFF_DYNAMIC)
+        if (!append_flag(py_retlist, "dynamic"))
+            goto error;
+#endif
+#ifdef IFF_OACTIVE
+    // Available in (at least) macOS, BSD
+    if (flags & IFF_OACTIVE)
+        if (!append_flag(py_retlist, "oactive"))
+            goto error;
+#endif
+#ifdef IFF_SIMPLEX
+    // Available in (at least) macOS, AIX, BSD
+    if (flags & IFF_SIMPLEX)
+        if (!append_flag(py_retlist, "simplex"))
+            goto error;
+#endif
+#ifdef IFF_LINK0
+    // Available in (at least) macOS, BSD
+    if (flags & IFF_LINK0)
+        if (!append_flag(py_retlist, "link0"))
+            goto error;
+#endif
+#ifdef IFF_LINK1
+    // Available in (at least) macOS, BSD
+    if (flags & IFF_LINK1)
+        if (!append_flag(py_retlist, "link1"))
+            goto error;
+#endif
+#ifdef IFF_LINK2
+    // Available in (at least) macOS, BSD
+    if (flags & IFF_LINK2)
+        if (!append_flag(py_retlist, "link2"))
+            goto error;
+#endif
+#ifdef IFF_D2
+    // Available in (at least) AIX
+    if (flags & IFF_D2)
+        if (!append_flag(py_retlist, "d2"))
+            goto error;
+#endif
+
+    return py_retlist;
+
+error:
+    Py_DECREF(py_retlist);
+    if (sock != -1)
+        close(sock);
+    return NULL;
+}
+
 
 /*
  * Inspect NIC flags, returns a bool indicating whether the NIC is
@@ -504,13 +708,14 @@ int psutil_get_nic_speed(int ifm_active) {
                 case(IFM_1000_LX):  // 1000baseLX - single-mode fiber
                 case(IFM_1000_CX):  // 1000baseCX - 150ohm STP
 #if defined(IFM_1000_TX) && !defined(PSUTIL_OPENBSD)
+                #define HAS_CASE_IFM_1000_TX 1
                 // FreeBSD 4 and others (but NOT OpenBSD) -> #define IFM_1000_T in net/if_media.h
                 case(IFM_1000_TX):
 #endif
 #ifdef IFM_1000_FX
                 case(IFM_1000_FX):
 #endif
-#ifdef IFM_1000_T
+#if defined(IFM_1000_T) && (!HAS_CASE_IFM_1000_TX || IFM_1000_T != IFM_1000_TX)
                 case(IFM_1000_T):
 #endif
                     return 1000;
@@ -664,21 +869,15 @@ extern "C" {
  * define the psutil C module methods and initialize the module.
  */
 static PyMethodDef mod_methods[] = {
-    {"getpriority", psutil_posix_getpriority, METH_VARARGS,
-     "Return process priority"},
-    {"setpriority", psutil_posix_setpriority, METH_VARARGS,
-     "Set process priority"},
-    {"net_if_addrs", psutil_net_if_addrs, METH_VARARGS,
-     "Retrieve NICs information"},
-    {"net_if_mtu", psutil_net_if_mtu, METH_VARARGS,
-     "Retrieve NIC MTU"},
-    {"net_if_is_running", psutil_net_if_is_running, METH_VARARGS,
-     "Return True if the NIC is running."},
-    {"getpagesize", psutil_getpagesize_pywrapper, METH_VARARGS,
-     "Return memory page size."},
+    {"getpagesize", psutil_getpagesize_pywrapper, METH_VARARGS},
+    {"getpriority", psutil_posix_getpriority, METH_VARARGS},
+    {"net_if_addrs", psutil_net_if_addrs, METH_VARARGS},
+    {"net_if_flags", psutil_net_if_flags, METH_VARARGS},
+    {"net_if_is_running", psutil_net_if_is_running, METH_VARARGS},
+    {"net_if_mtu", psutil_net_if_mtu, METH_VARARGS},
+    {"setpriority", psutil_posix_setpriority, METH_VARARGS},
 #if defined(PSUTIL_BSD) || defined(PSUTIL_OSX)
-    {"net_if_duplex_speed", psutil_net_if_duplex_speed, METH_VARARGS,
-     "Return NIC stats."},
+    {"net_if_duplex_speed", psutil_net_if_duplex_speed, METH_VARARGS},
 #endif
     {NULL, NULL, 0, NULL}
 };
diff --git a/contrib/python/psutil/py3/psutil/_psutil_windows.c b/contrib/python/psutil/py3/psutil/_psutil_windows.c
index a2154e923e..bb6e12ff80 100644
--- a/contrib/python/psutil/py3/psutil/_psutil_windows.c
+++ b/contrib/python/psutil/py3/psutil/_psutil_windows.c
@@ -14,1536 +14,25 @@
  * - NtResumeProcess
  */
 
-// Fixes clash between winsock2.h and windows.h
-#define WIN32_LEAN_AND_MEAN
-
 #include <Python.h>
 #include <windows.h>
-#include <Psapi.h>  // memory_info(), memory_maps()
-#include <signal.h>
-#include <tlhelp32.h>  // threads(), PROCESSENTRY32
-
-// Link with Iphlpapi.lib
-#pragma comment(lib, "IPHLPAPI.lib")
 
 #include "_psutil_common.h"
-#include "arch/windows/security.h"
-#include "arch/windows/process_utils.h"
-#include "arch/windows/process_info.h"
-#include "arch/windows/process_handles.h"
-#include "arch/windows/disk.h"
 #include "arch/windows/cpu.h"
+#include "arch/windows/disk.h"
+#include "arch/windows/mem.h"
 #include "arch/windows/net.h"
+#include "arch/windows/proc.h"
+#include "arch/windows/proc_handles.h"
+#include "arch/windows/proc_info.h"
+#include "arch/windows/proc_utils.h"
+#include "arch/windows/security.h"
+#include "arch/windows/sensors.h"
 #include "arch/windows/services.h"
 #include "arch/windows/socks.h"
+#include "arch/windows/sys.h"
 #include "arch/windows/wmi.h"
 
-// Raised by Process.wait().
-static PyObject *TimeoutExpired;
-static PyObject *TimeoutAbandoned;
-
-
-/*
- * Return the number of logical, active CPUs. Return 0 if undetermined.
- * See discussion at: https://bugs.python.org/issue33166#msg314631
- */
-unsigned int
-psutil_get_num_cpus(int fail_on_err) {
-    unsigned int ncpus = 0;
-
-    // Minimum requirement: Windows 7
-    if (GetActiveProcessorCount != NULL) {
-        ncpus = GetActiveProcessorCount(ALL_PROCESSOR_GROUPS);
-        if ((ncpus == 0) && (fail_on_err == 1)) {
-            PyErr_SetFromWindowsErr(0);
-        }
-    }
-    else {
-        psutil_debug("GetActiveProcessorCount() not available; "
-                     "using GetSystemInfo()");
-        ncpus = (unsigned int)PSUTIL_SYSTEM_INFO.dwNumberOfProcessors;
-        if ((ncpus <= 0) && (fail_on_err == 1)) {
-            PyErr_SetString(
-                PyExc_RuntimeError,
-                "GetSystemInfo() failed to retrieve CPU count");
-        }
-    }
-    return ncpus;
-}
-
-
-/*
- * Return a Python float representing the system uptime expressed in seconds
- * since the epoch.
- */
-static PyObject *
-psutil_boot_time(PyObject *self, PyObject *args) {
-    ULONGLONG upTime;
-    FILETIME fileTime;
-
-    GetSystemTimeAsFileTime(&fileTime);
-    // Number of milliseconds that have elapsed since the system was started.
-    upTime = GetTickCount64() / 1000ull;
-    return Py_BuildValue("d", psutil_FiletimeToUnixTime(fileTime) - upTime);
-}
-
-
-/*
- * Return 1 if PID exists in the current process list, else 0.
- */
-static PyObject *
-psutil_pid_exists(PyObject *self, PyObject *args) {
-    DWORD pid;
-    int status;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    status = psutil_pid_is_running(pid);
-    if (-1 == status)
-        return NULL; // exception raised in psutil_pid_is_running()
-    return PyBool_FromLong(status);
-}
-
-
-/*
- * Return a Python list of all the PIDs running on the system.
- */
-static PyObject *
-psutil_pids(PyObject *self, PyObject *args) {
-    DWORD *proclist = NULL;
-    DWORD numberOfReturnedPIDs;
-    DWORD i;
-    PyObject *py_pid = NULL;
-    PyObject *py_retlist = PyList_New(0);
-
-    if (py_retlist == NULL)
-        return NULL;
-    proclist = psutil_get_pids(&numberOfReturnedPIDs);
-    if (proclist == NULL)
-        goto error;
-
-    for (i = 0; i < numberOfReturnedPIDs; i++) {
-        py_pid = PyLong_FromPid(proclist[i]);
-        if (!py_pid)
-            goto error;
-        if (PyList_Append(py_retlist, py_pid))
-            goto error;
-        Py_CLEAR(py_pid);
-    }
-
-    // free C array allocated for PIDs
-    free(proclist);
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_pid);
-    Py_DECREF(py_retlist);
-    if (proclist != NULL)
-        free(proclist);
-    return NULL;
-}
-
-
-/*
- * Kill a process given its PID.
- */
-static PyObject *
-psutil_proc_kill(PyObject *self, PyObject *args) {
-    HANDLE hProcess;
-    DWORD pid;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    if (pid == 0)
-        return AccessDenied("automatically set for PID 0");
-
-    hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
-    hProcess = psutil_check_phandle(hProcess, pid, 0);
-    if (hProcess == NULL) {
-        return NULL;
-    }
-
-    if (! TerminateProcess(hProcess, SIGTERM)) {
-        // ERROR_ACCESS_DENIED may happen if the process already died. See:
-        // https://github.com/giampaolo/psutil/issues/1099
-        // http://bugs.python.org/issue14252
-        if (GetLastError() != ERROR_ACCESS_DENIED) {
-            PyErr_SetFromOSErrnoWithSyscall("TerminateProcess");
-            return NULL;
-        }
-    }
-
-    CloseHandle(hProcess);
-    Py_RETURN_NONE;
-}
-
-
-/*
- * Wait for process to terminate and return its exit code.
- */
-static PyObject *
-psutil_proc_wait(PyObject *self, PyObject *args) {
-    HANDLE hProcess;
-    DWORD ExitCode;
-    DWORD retVal;
-    DWORD pid;
-    long timeout;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "l", &pid, &timeout))
-        return NULL;
-    if (pid == 0)
-        return AccessDenied("automatically set for PID 0");
-
-    hProcess = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
-                           FALSE, pid);
-    if (hProcess == NULL) {
-        if (GetLastError() == ERROR_INVALID_PARAMETER) {
-            // no such process; we do not want to raise NSP but
-            // return None instead.
-            Py_RETURN_NONE;
-        }
-        else {
-            PyErr_SetFromOSErrnoWithSyscall("OpenProcess");
-            return NULL;
-        }
-    }
-
-    // wait until the process has terminated
-    Py_BEGIN_ALLOW_THREADS
-    retVal = WaitForSingleObject(hProcess, timeout);
-    Py_END_ALLOW_THREADS
-
-    // handle return code
-    if (retVal == WAIT_FAILED) {
-        PyErr_SetFromOSErrnoWithSyscall("WaitForSingleObject");
-        CloseHandle(hProcess);
-        return NULL;
-    }
-    if (retVal == WAIT_TIMEOUT) {
-        PyErr_SetString(TimeoutExpired,
-                        "WaitForSingleObject() returned WAIT_TIMEOUT");
-        CloseHandle(hProcess);
-        return NULL;
-    }
-    if (retVal == WAIT_ABANDONED) {
-        psutil_debug("WaitForSingleObject() -> WAIT_ABANDONED");
-        PyErr_SetString(TimeoutAbandoned,
-                        "WaitForSingleObject() returned WAIT_ABANDONED");
-        CloseHandle(hProcess);
-        return NULL;
-    }
-
-    // WaitForSingleObject() returned WAIT_OBJECT_0. It means the
-    // process is gone so we can get its process exit code. The PID
-    // may still stick around though but we'll handle that from Python.
-    if (GetExitCodeProcess(hProcess, &ExitCode) == 0) {
-        PyErr_SetFromOSErrnoWithSyscall("GetExitCodeProcess");
-        CloseHandle(hProcess);
-        return NULL;
-    }
-
-    CloseHandle(hProcess);
-
-#if PY_MAJOR_VERSION >= 3
-    return PyLong_FromLong((long) ExitCode);
-#else
-    return PyInt_FromLong((long) ExitCode);
-#endif
-}
-
-
-/*
- * Return a Python tuple (user_time, kernel_time)
- */
-static PyObject *
-psutil_proc_times(PyObject *self, PyObject *args) {
-    DWORD       pid;
-    HANDLE      hProcess;
-    FILETIME    ftCreate, ftExit, ftKernel, ftUser;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
-
-    if (hProcess == NULL)
-        return NULL;
-    if (! GetProcessTimes(hProcess, &ftCreate, &ftExit, &ftKernel, &ftUser)) {
-        if (GetLastError() == ERROR_ACCESS_DENIED) {
-            // usually means the process has died so we throw a NoSuchProcess
-            // here
-            NoSuchProcess("GetProcessTimes -> ERROR_ACCESS_DENIED");
-        }
-        else {
-            PyErr_SetFromWindowsErr(0);
-        }
-        CloseHandle(hProcess);
-        return NULL;
-    }
-
-    CloseHandle(hProcess);
-
-    /*
-     * User and kernel times are represented as a FILETIME structure
-     * which contains a 64-bit value representing the number of
-     * 100-nanosecond intervals since January 1, 1601 (UTC):
-     * http://msdn.microsoft.com/en-us/library/ms724284(VS.85).aspx
-     * To convert it into a float representing the seconds that the
-     * process has executed in user/kernel mode I borrowed the code
-     * below from Python's Modules/posixmodule.c
-     */
-    return Py_BuildValue(
-       "(ddd)",
-       (double)(ftUser.dwHighDateTime * HI_T + \
-                ftUser.dwLowDateTime * LO_T),
-       (double)(ftKernel.dwHighDateTime * HI_T + \
-                ftKernel.dwLowDateTime * LO_T),
-       psutil_FiletimeToUnixTime(ftCreate)
-   );
-}
-
-
-/*
- * Return process cmdline as a Python list of cmdline arguments.
- */
-static PyObject *
-psutil_proc_cmdline(PyObject *self, PyObject *args, PyObject *kwdict) {
-    DWORD pid;
-    int pid_return;
-    int use_peb;
-    PyObject *py_usepeb = Py_True;
-    static char *keywords[] = {"pid", "use_peb", NULL};
-
-    if (!PyArg_ParseTupleAndKeywords(args, kwdict, _Py_PARSE_PID "|O",
-                                     keywords, &pid, &py_usepeb))
-    {
-        return NULL;
-    }
-    if ((pid == 0) || (pid == 4))
-        return Py_BuildValue("[]");
-
-    pid_return = psutil_pid_is_running(pid);
-    if (pid_return == 0)
-        return NoSuchProcess("psutil_pid_is_running -> 0");
-    if (pid_return == -1)
-        return NULL;
-
-    use_peb = (py_usepeb == Py_True) ? 1 : 0;
-    return psutil_get_cmdline(pid, use_peb);
-}
-
-
-/*
- * Return process cmdline as a Python list of cmdline arguments.
- */
-static PyObject *
-psutil_proc_environ(PyObject *self, PyObject *args) {
-    DWORD pid;
-    int pid_return;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    if ((pid == 0) || (pid == 4))
-        return Py_BuildValue("s", "");
-
-    pid_return = psutil_pid_is_running(pid);
-    if (pid_return == 0)
-        return NoSuchProcess("psutil_pid_is_running -> 0");
-    if (pid_return == -1)
-        return NULL;
-
-    return psutil_get_environ(pid);
-}
-
-
-/*
- * Return process executable path. Works for all processes regardless of
- * privilege. NtQuerySystemInformation has some sort of internal cache,
- * since it succeeds even when a process is gone (but not if a PID never
- * existed).
- */
-static PyObject *
-psutil_proc_exe(PyObject *self, PyObject *args) {
-    DWORD pid;
-    NTSTATUS status;
-    PVOID buffer;
-    ULONG bufferSize = 0x100;
-    SYSTEM_PROCESS_ID_INFORMATION processIdInfo;
-    PyObject *py_exe;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    if (pid == 0)
-        return AccessDenied("automatically set for PID 0");
-
-    buffer = MALLOC_ZERO(bufferSize);
-    if (! buffer)
-        return PyErr_NoMemory();
-    processIdInfo.ProcessId = (HANDLE)(ULONG_PTR)pid;
-    processIdInfo.ImageName.Length = 0;
-    processIdInfo.ImageName.MaximumLength = (USHORT)bufferSize;
-    processIdInfo.ImageName.Buffer = buffer;
-
-    status = NtQuerySystemInformation(
-        SystemProcessIdInformation,
-        &processIdInfo,
-        sizeof(SYSTEM_PROCESS_ID_INFORMATION),
-        NULL);
-
-    if (status == STATUS_INFO_LENGTH_MISMATCH) {
-        // Required length is stored in MaximumLength.
-        FREE(buffer);
-        buffer = MALLOC_ZERO(processIdInfo.ImageName.MaximumLength);
-        if (! buffer)
-            return PyErr_NoMemory();
-        processIdInfo.ImageName.Buffer = buffer;
-
-        status = NtQuerySystemInformation(
-            SystemProcessIdInformation,
-            &processIdInfo,
-            sizeof(SYSTEM_PROCESS_ID_INFORMATION),
-            NULL);
-    }
-
-    if (! NT_SUCCESS(status)) {
-        FREE(buffer);
-        if (psutil_pid_is_running(pid) == 0)
-            NoSuchProcess("psutil_pid_is_running -> 0");
-        else
-            psutil_SetFromNTStatusErr(status, "NtQuerySystemInformation");
-        return NULL;
-    }
-
-    if (processIdInfo.ImageName.Buffer == NULL) {
-        // Happens for PID 4.
-        py_exe = Py_BuildValue("s", "");
-    }
-    else {
-        py_exe = PyUnicode_FromWideChar(processIdInfo.ImageName.Buffer,
-                                        processIdInfo.ImageName.Length / 2);
-    }
-    FREE(buffer);
-    return py_exe;
-}
-
-
-/*
- * Return process memory information as a Python tuple.
- */
-static PyObject *
-psutil_proc_memory_info(PyObject *self, PyObject *args) {
-    HANDLE hProcess;
-    DWORD pid;
-    PROCESS_MEMORY_COUNTERS_EX cnt;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
-    if (NULL == hProcess)
-        return NULL;
-
-    if (! GetProcessMemoryInfo(hProcess, (PPROCESS_MEMORY_COUNTERS)&cnt,
-                               sizeof(cnt))) {
-        PyErr_SetFromWindowsErr(0);
-        CloseHandle(hProcess);
-        return NULL;
-    }
-    CloseHandle(hProcess);
-
-    // PROCESS_MEMORY_COUNTERS values are defined as SIZE_T which on 64bits
-    // is an (unsigned long long) and on 32bits is an (unsigned int).
-    // "_WIN64" is defined if we're running a 64bit Python interpreter not
-    // exclusively if the *system* is 64bit.
-#if defined(_WIN64)
-    return Py_BuildValue(
-        "(kKKKKKKKKK)",
-        cnt.PageFaultCount,  // unsigned long
-        (unsigned long long)cnt.PeakWorkingSetSize,
-        (unsigned long long)cnt.WorkingSetSize,
-        (unsigned long long)cnt.QuotaPeakPagedPoolUsage,
-        (unsigned long long)cnt.QuotaPagedPoolUsage,
-        (unsigned long long)cnt.QuotaPeakNonPagedPoolUsage,
-        (unsigned long long)cnt.QuotaNonPagedPoolUsage,
-        (unsigned long long)cnt.PagefileUsage,
-        (unsigned long long)cnt.PeakPagefileUsage,
-        (unsigned long long)cnt.PrivateUsage);
-#else
-    return Py_BuildValue(
-        "(kIIIIIIIII)",
-        cnt.PageFaultCount,    // unsigned long
-        (unsigned int)cnt.PeakWorkingSetSize,
-        (unsigned int)cnt.WorkingSetSize,
-        (unsigned int)cnt.QuotaPeakPagedPoolUsage,
-        (unsigned int)cnt.QuotaPagedPoolUsage,
-        (unsigned int)cnt.QuotaPeakNonPagedPoolUsage,
-        (unsigned int)cnt.QuotaNonPagedPoolUsage,
-        (unsigned int)cnt.PagefileUsage,
-        (unsigned int)cnt.PeakPagefileUsage,
-        (unsigned int)cnt.PrivateUsage);
-#endif
-}
-
-
-static int
-psutil_GetProcWsetInformation(
-        DWORD pid,
-        HANDLE hProcess,
-        PMEMORY_WORKING_SET_INFORMATION *wSetInfo)
-{
-    NTSTATUS status;
-    PVOID buffer;
-    SIZE_T bufferSize;
-
-    bufferSize = 0x8000;
-    buffer = MALLOC_ZERO(bufferSize);
-    if (! buffer) {
-        PyErr_NoMemory();
-        return 1;
-    }
-
-    while ((status = NtQueryVirtualMemory(
-            hProcess,
-            NULL,
-            MemoryWorkingSetInformation,
-            buffer,
-            bufferSize,
-            NULL)) == STATUS_INFO_LENGTH_MISMATCH)
-    {
-        FREE(buffer);
-        bufferSize *= 2;
-        // Fail if we're resizing the buffer to something very large.
-        if (bufferSize > 256 * 1024 * 1024) {
-            PyErr_SetString(PyExc_RuntimeError,
-                            "NtQueryVirtualMemory bufsize is too large");
-            return 1;
-        }
-        buffer = MALLOC_ZERO(bufferSize);
-        if (! buffer) {
-            PyErr_NoMemory();
-            return 1;
-        }
-    }
-
-    if (!NT_SUCCESS(status)) {
-        if (status == STATUS_ACCESS_DENIED) {
-            AccessDenied("NtQueryVirtualMemory -> STATUS_ACCESS_DENIED");
-        }
-        else if (psutil_pid_is_running(pid) == 0) {
-            NoSuchProcess("psutil_pid_is_running -> 0");
-        }
-        else {
-            PyErr_Clear();
-            psutil_SetFromNTStatusErr(
-                status, "NtQueryVirtualMemory(MemoryWorkingSetInformation)");
-        }
-        HeapFree(GetProcessHeap(), 0, buffer);
-        return 1;
-    }
-
-    *wSetInfo = (PMEMORY_WORKING_SET_INFORMATION)buffer;
-    return 0;
-}
-
-
-/*
- * Returns the USS of the process.
- * Reference:
- * https://dxr.mozilla.org/mozilla-central/source/xpcom/base/
- *     nsMemoryReporterManager.cpp
- */
-static PyObject *
-psutil_proc_memory_uss(PyObject *self, PyObject *args) {
-    DWORD pid;
-    HANDLE hProcess;
-    PSUTIL_PROCESS_WS_COUNTERS wsCounters;
-    PMEMORY_WORKING_SET_INFORMATION wsInfo;
-    ULONG_PTR i;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_INFORMATION);
-    if (hProcess == NULL)
-        return NULL;
-
-    if (psutil_GetProcWsetInformation(pid, hProcess, &wsInfo) != 0) {
-        CloseHandle(hProcess);
-        return NULL;
-    }
-    memset(&wsCounters, 0, sizeof(PSUTIL_PROCESS_WS_COUNTERS));
-
-    for (i = 0; i < wsInfo->NumberOfEntries; i++) {
-        // This is what ProcessHacker does.
-        /*
-        wsCounters.NumberOfPages++;
-        if (wsInfo->WorkingSetInfo[i].ShareCount > 1)
-            wsCounters.NumberOfSharedPages++;
-        if (wsInfo->WorkingSetInfo[i].ShareCount == 0)
-            wsCounters.NumberOfPrivatePages++;
-        if (wsInfo->WorkingSetInfo[i].Shared)
-            wsCounters.NumberOfShareablePages++;
-        */
-
-        // This is what we do: count shared pages that only one process
-        // is using as private (USS).
-        if (!wsInfo->WorkingSetInfo[i].Shared ||
-                wsInfo->WorkingSetInfo[i].ShareCount <= 1) {
-            wsCounters.NumberOfPrivatePages++;
-        }
-    }
-
-    HeapFree(GetProcessHeap(), 0, wsInfo);
-    CloseHandle(hProcess);
-
-    return Py_BuildValue("I", wsCounters.NumberOfPrivatePages);
-}
-
-
-/*
- * Return a Python integer indicating the total amount of physical memory
- * in bytes.
- */
-static PyObject *
-psutil_virtual_mem(PyObject *self, PyObject *args) {
-    MEMORYSTATUSEX memInfo;
-    memInfo.dwLength = sizeof(MEMORYSTATUSEX);
-
-    if (! GlobalMemoryStatusEx(&memInfo)) {
-        PyErr_SetFromWindowsErr(0);
-        return NULL;
-    }
-    return Py_BuildValue("(LLLLLL)",
-                         memInfo.ullTotalPhys,      // total
-                         memInfo.ullAvailPhys,      // avail
-                         memInfo.ullTotalPageFile,  // total page file
-                         memInfo.ullAvailPageFile,  // avail page file
-                         memInfo.ullTotalVirtual,   // total virtual
-                         memInfo.ullAvailVirtual);  // avail virtual
-}
-
-
-/*
- * Return process current working directory as a Python string.
- */
-static PyObject *
-psutil_proc_cwd(PyObject *self, PyObject *args) {
-    DWORD pid;
-    int pid_return;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    pid_return = psutil_pid_is_running(pid);
-    if (pid_return == 0)
-        return NoSuchProcess("psutil_pid_is_running -> 0");
-    if (pid_return == -1)
-        return NULL;
-
-    return psutil_get_cwd(pid);
-}
-
-
-/*
- * Resume or suspends a process
- */
-static PyObject *
-psutil_proc_suspend_or_resume(PyObject *self, PyObject *args) {
-    DWORD pid;
-    NTSTATUS status;
-    HANDLE hProcess;
-    PyObject* suspend;
-
-        if (! PyArg_ParseTuple(args, _Py_PARSE_PID "O", &pid, &suspend))
-            return NULL;
-
-    hProcess = psutil_handle_from_pid(pid, PROCESS_SUSPEND_RESUME);
-    if (hProcess == NULL)
-        return NULL;
-
-    if (PyObject_IsTrue(suspend))
-        status = NtSuspendProcess(hProcess);
-    else
-        status = NtResumeProcess(hProcess);
-
-    if (! NT_SUCCESS(status)) {
-        CloseHandle(hProcess);
-        return psutil_SetFromNTStatusErr(status, "NtSuspend|ResumeProcess");
-    }
-
-    CloseHandle(hProcess);
-    Py_RETURN_NONE;
-}
-
-
-static PyObject *
-psutil_proc_threads(PyObject *self, PyObject *args) {
-    HANDLE hThread = NULL;
-    THREADENTRY32 te32 = {0};
-    DWORD pid;
-    int pid_return;
-    int rc;
-    FILETIME ftDummy, ftKernel, ftUser;
-    HANDLE hThreadSnap = NULL;
-    PyObject *py_tuple = NULL;
-    PyObject *py_retlist = PyList_New(0);
-
-    if (py_retlist == NULL)
-        return NULL;
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        goto error;
-    if (pid == 0) {
-        // raise AD instead of returning 0 as procexp is able to
-        // retrieve useful information somehow
-        AccessDenied("forced for PID 0");
-        goto error;
-    }
-
-    pid_return = psutil_pid_is_running(pid);
-    if (pid_return == 0) {
-        NoSuchProcess("psutil_pid_is_running -> 0");
-        goto error;
-    }
-    if (pid_return == -1)
-        goto error;
-
-    hThreadSnap = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
-    if (hThreadSnap == INVALID_HANDLE_VALUE) {
-        PyErr_SetFromOSErrnoWithSyscall("CreateToolhelp32Snapshot");
-        goto error;
-    }
-
-    // Fill in the size of the structure before using it
-    te32.dwSize = sizeof(THREADENTRY32);
-
-    if (! Thread32First(hThreadSnap, &te32)) {
-        PyErr_SetFromOSErrnoWithSyscall("Thread32First");
-        goto error;
-    }
-
-    // Walk the thread snapshot to find all threads of the process.
-    // If the thread belongs to the process, increase the counter.
-    do {
-        if (te32.th32OwnerProcessID == pid) {
-            py_tuple = NULL;
-            hThread = NULL;
-            hThread = OpenThread(THREAD_QUERY_INFORMATION,
-                                 FALSE, te32.th32ThreadID);
-            if (hThread == NULL) {
-                // thread has disappeared on us
-                continue;
-            }
-
-            rc = GetThreadTimes(hThread, &ftDummy, &ftDummy, &ftKernel,
-                                &ftUser);
-            if (rc == 0) {
-                PyErr_SetFromOSErrnoWithSyscall("GetThreadTimes");
-                goto error;
-            }
-
-            /*
-             * User and kernel times are represented as a FILETIME structure
-             * which contains a 64-bit value representing the number of
-             * 100-nanosecond intervals since January 1, 1601 (UTC):
-             * http://msdn.microsoft.com/en-us/library/ms724284(VS.85).aspx
-             * To convert it into a float representing the seconds that the
-             * process has executed in user/kernel mode I borrowed the code
-             * below from Python's Modules/posixmodule.c
-             */
-            py_tuple = Py_BuildValue(
-                "kdd",
-                te32.th32ThreadID,
-                (double)(ftUser.dwHighDateTime * HI_T + \
-                         ftUser.dwLowDateTime * LO_T),
-                (double)(ftKernel.dwHighDateTime * HI_T + \
-                         ftKernel.dwLowDateTime * LO_T));
-            if (!py_tuple)
-                goto error;
-            if (PyList_Append(py_retlist, py_tuple))
-                goto error;
-            Py_CLEAR(py_tuple);
-
-            CloseHandle(hThread);
-        }
-    } while (Thread32Next(hThreadSnap, &te32));
-
-    CloseHandle(hThreadSnap);
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_tuple);
-    Py_DECREF(py_retlist);
-    if (hThread != NULL)
-        CloseHandle(hThread);
-    if (hThreadSnap != NULL)
-        CloseHandle(hThreadSnap);
-    return NULL;
-}
-
-
-static PyObject *
-psutil_proc_open_files(PyObject *self, PyObject *args) {
-    DWORD pid;
-    HANDLE processHandle;
-    DWORD access = PROCESS_DUP_HANDLE | PROCESS_QUERY_INFORMATION;
-    PyObject *py_retlist;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    processHandle = psutil_handle_from_pid(pid, access);
-    if (processHandle == NULL)
-        return NULL;
-
-    py_retlist = psutil_get_open_files(pid, processHandle);
-    CloseHandle(processHandle);
-    return py_retlist;
-}
-
-
-static PTOKEN_USER
-_psutil_user_token_from_pid(DWORD pid) {
-    HANDLE hProcess = NULL;
-    HANDLE hToken = NULL;
-    PTOKEN_USER userToken = NULL;
-    ULONG bufferSize = 0x100;
-
-    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
-    if (hProcess == NULL)
-        return NULL;
-
-    if (!OpenProcessToken(hProcess, TOKEN_QUERY, &hToken)) {
-        PyErr_SetFromOSErrnoWithSyscall("OpenProcessToken");
-        goto error;
-    }
-
-    // Get the user SID.
-    while (1) {
-        userToken = malloc(bufferSize);
-        if (userToken == NULL) {
-            PyErr_NoMemory();
-            goto error;
-        }
-        if (!GetTokenInformation(hToken, TokenUser, userToken, bufferSize,
-                                 &bufferSize))
-        {
-            if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
-                free(userToken);
-                continue;
-            }
-            else {
-                PyErr_SetFromOSErrnoWithSyscall("GetTokenInformation");
-                goto error;
-            }
-        }
-        break;
-    }
-
-    CloseHandle(hProcess);
-    CloseHandle(hToken);
-    return userToken;
-
-error:
-    if (hProcess != NULL)
-        CloseHandle(hProcess);
-    if (hToken != NULL)
-        CloseHandle(hToken);
-    return NULL;
-}
-
-
-/*
- * Return process username as a "DOMAIN//USERNAME" string.
- */
-static PyObject *
-psutil_proc_username(PyObject *self, PyObject *args) {
-    DWORD pid;
-    PTOKEN_USER userToken = NULL;
-    WCHAR *userName = NULL;
-    WCHAR *domainName = NULL;
-    ULONG nameSize = 0x100;
-    ULONG domainNameSize = 0x100;
-    SID_NAME_USE nameUse;
-    PyObject *py_username = NULL;
-    PyObject *py_domain = NULL;
-    PyObject *py_tuple = NULL;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    userToken = _psutil_user_token_from_pid(pid);
-    if (userToken == NULL)
-        return NULL;
-
-    // resolve the SID to a name
-    while (1) {
-        userName = malloc(nameSize * sizeof(WCHAR));
-        if (userName == NULL) {
-            PyErr_NoMemory();
-            goto error;
-        }
-        domainName = malloc(domainNameSize * sizeof(WCHAR));
-        if (domainName == NULL) {
-            PyErr_NoMemory();
-            goto error;
-        }
-        if (!LookupAccountSidW(NULL, userToken->User.Sid, userName, &nameSize,
-                               domainName, &domainNameSize, &nameUse))
-        {
-            if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
-                free(userName);
-                free(domainName);
-                continue;
-            }
-            else if (GetLastError() == ERROR_NONE_MAPPED) {
-                // From MS doc:
-                // https://docs.microsoft.com/en-us/windows/win32/api/winbase/
-                //     nf-winbase-lookupaccountsida
-                // If the function cannot find an account name for the SID,
-                // GetLastError returns ERROR_NONE_MAPPED. This can occur if
-                // a network time-out prevents the function from finding the
-                // name. It also occurs for SIDs that have no corresponding
-                // account name, such as a logon SID that identifies a logon
-                // session.
-                AccessDenied("LookupAccountSidW -> ERROR_NONE_MAPPED");
-                goto error;
-            }
-            else {
-                PyErr_SetFromOSErrnoWithSyscall("LookupAccountSidW");
-                goto error;
-            }
-        }
-        break;
-    }
-
-    py_domain = PyUnicode_FromWideChar(domainName, wcslen(domainName));
-    if (! py_domain)
-        goto error;
-    py_username = PyUnicode_FromWideChar(userName, wcslen(userName));
-    if (! py_username)
-        goto error;
-    py_tuple = Py_BuildValue("OO", py_domain, py_username);
-    if (! py_tuple)
-        goto error;
-    Py_DECREF(py_domain);
-    Py_DECREF(py_username);
-
-    free(userName);
-    free(domainName);
-    free(userToken);
-    return py_tuple;
-
-error:
-    if (userName != NULL)
-        free(userName);
-    if (domainName != NULL)
-        free(domainName);
-    if (userToken != NULL)
-        free(userToken);
-    Py_XDECREF(py_domain);
-    Py_XDECREF(py_username);
-    Py_XDECREF(py_tuple);
-    return NULL;
-}
-
-
-/*
- * Get process priority as a Python integer.
- */
-static PyObject *
-psutil_proc_priority_get(PyObject *self, PyObject *args) {
-    DWORD pid;
-    DWORD priority;
-    HANDLE hProcess;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
-    if (hProcess == NULL)
-        return NULL;
-
-    priority = GetPriorityClass(hProcess);
-    if (priority == 0) {
-        PyErr_SetFromWindowsErr(0);
-        CloseHandle(hProcess);
-        return NULL;
-    }
-    CloseHandle(hProcess);
-    return Py_BuildValue("i", priority);
-}
-
-
-/*
- * Set process priority.
- */
-static PyObject *
-psutil_proc_priority_set(PyObject *self, PyObject *args) {
-    DWORD pid;
-    int priority;
-    int retval;
-    HANDLE hProcess;
-    DWORD access = PROCESS_QUERY_INFORMATION | PROCESS_SET_INFORMATION;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "i", &pid, &priority))
-        return NULL;
-    hProcess = psutil_handle_from_pid(pid, access);
-    if (hProcess == NULL)
-        return NULL;
-
-    retval = SetPriorityClass(hProcess, priority);
-    if (retval == 0) {
-        PyErr_SetFromWindowsErr(0);
-        CloseHandle(hProcess);
-        return NULL;
-    }
-
-    CloseHandle(hProcess);
-    Py_RETURN_NONE;
-}
-
-
-/*
- * Get process IO priority as a Python integer.
- */
-static PyObject *
-psutil_proc_io_priority_get(PyObject *self, PyObject *args) {
-    DWORD pid;
-    HANDLE hProcess;
-    DWORD IoPriority;
-    NTSTATUS status;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-
-    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
-    if (hProcess == NULL)
-        return NULL;
-
-    status = NtQueryInformationProcess(
-        hProcess,
-        ProcessIoPriority,
-        &IoPriority,
-        sizeof(DWORD),
-        NULL
-    );
-
-    CloseHandle(hProcess);
-    if (! NT_SUCCESS(status))
-        return psutil_SetFromNTStatusErr(status, "NtQueryInformationProcess");
-    return Py_BuildValue("i", IoPriority);
-}
-
-
-/*
- * Set process IO priority.
- */
-static PyObject *
-psutil_proc_io_priority_set(PyObject *self, PyObject *args) {
-    DWORD pid;
-    DWORD prio;
-    HANDLE hProcess;
-    NTSTATUS status;
-    DWORD access = PROCESS_QUERY_INFORMATION | PROCESS_SET_INFORMATION;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "i", &pid, &prio))
-        return NULL;
-
-    hProcess = psutil_handle_from_pid(pid, access);
-    if (hProcess == NULL)
-        return NULL;
-
-    status = NtSetInformationProcess(
-        hProcess,
-        ProcessIoPriority,
-        (PVOID)&prio,
-        sizeof(DWORD)
-    );
-
-    CloseHandle(hProcess);
-    if (! NT_SUCCESS(status))
-        return psutil_SetFromNTStatusErr(status, "NtSetInformationProcess");
-    Py_RETURN_NONE;
-}
-
-
-/*
- * Return a Python tuple referencing process I/O counters.
- */
-static PyObject *
-psutil_proc_io_counters(PyObject *self, PyObject *args) {
-    DWORD pid;
-    HANDLE hProcess;
-    IO_COUNTERS IoCounters;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
-    if (NULL == hProcess)
-        return NULL;
-
-    if (! GetProcessIoCounters(hProcess, &IoCounters)) {
-        PyErr_SetFromWindowsErr(0);
-        CloseHandle(hProcess);
-        return NULL;
-    }
-
-    CloseHandle(hProcess);
-    return Py_BuildValue("(KKKKKK)",
-                         IoCounters.ReadOperationCount,
-                         IoCounters.WriteOperationCount,
-                         IoCounters.ReadTransferCount,
-                         IoCounters.WriteTransferCount,
-                         IoCounters.OtherOperationCount,
-                         IoCounters.OtherTransferCount);
-}
-
-
-/*
- * Return process CPU affinity as a bitmask
- */
-static PyObject *
-psutil_proc_cpu_affinity_get(PyObject *self, PyObject *args) {
-    DWORD pid;
-    HANDLE hProcess;
-    DWORD_PTR proc_mask;
-    DWORD_PTR system_mask;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
-    if (hProcess == NULL) {
-        return NULL;
-    }
-    if (GetProcessAffinityMask(hProcess, &proc_mask, &system_mask) == 0) {
-        PyErr_SetFromWindowsErr(0);
-        CloseHandle(hProcess);
-        return NULL;
-    }
-
-    CloseHandle(hProcess);
-#ifdef _WIN64
-    return Py_BuildValue("K", (unsigned long long)proc_mask);
-#else
-    return Py_BuildValue("k", (unsigned long)proc_mask);
-#endif
-}
-
-
-/*
- * Set process CPU affinity
- */
-static PyObject *
-psutil_proc_cpu_affinity_set(PyObject *self, PyObject *args) {
-    DWORD pid;
-    HANDLE hProcess;
-    DWORD access = PROCESS_QUERY_INFORMATION | PROCESS_SET_INFORMATION;
-    DWORD_PTR mask;
-
-#ifdef _WIN64
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "K", &pid, &mask))
-#else
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "k", &pid, &mask))
-#endif
-    {
-        return NULL;
-    }
-    hProcess = psutil_handle_from_pid(pid, access);
-    if (hProcess == NULL)
-        return NULL;
-
-    if (SetProcessAffinityMask(hProcess, mask) == 0) {
-        PyErr_SetFromWindowsErr(0);
-        CloseHandle(hProcess);
-        return NULL;
-    }
-
-    CloseHandle(hProcess);
-    Py_RETURN_NONE;
-}
-
-
-/*
- * Return True if all process threads are in waiting/suspended state.
- */
-static PyObject *
-psutil_proc_is_suspended(PyObject *self, PyObject *args) {
-    DWORD pid;
-    ULONG i;
-    PSYSTEM_PROCESS_INFORMATION process;
-    PVOID buffer;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    if (! psutil_get_proc_info(pid, &process, &buffer))
-        return NULL;
-    for (i = 0; i < process->NumberOfThreads; i++) {
-        if (process->Threads[i].ThreadState != Waiting ||
-                process->Threads[i].WaitReason != Suspended)
-        {
-            free(buffer);
-            Py_RETURN_FALSE;
-        }
-    }
-    free(buffer);
-    Py_RETURN_TRUE;
-}
-
-
-/*
- * Return a Python dict of tuples for disk I/O information
- */
-static PyObject *
-psutil_users(PyObject *self, PyObject *args) {
-    HANDLE hServer = WTS_CURRENT_SERVER_HANDLE;
-    LPWSTR buffer_user = NULL;
-    LPWSTR buffer_addr = NULL;
-    LPWSTR buffer_info = NULL;
-    PWTS_SESSION_INFOW sessions = NULL;
-    DWORD count;
-    DWORD i;
-    DWORD sessionId;
-    DWORD bytes;
-    PWTS_CLIENT_ADDRESS address;
-    char address_str[50];
-    PWTSINFOW wts_info;
-    PyObject *py_tuple = NULL;
-    PyObject *py_address = NULL;
-    PyObject *py_username = NULL;
-    PyObject *py_retlist = PyList_New(0);
-
-    if (py_retlist == NULL)
-        return NULL;
-
-    if (WTSEnumerateSessionsW == NULL ||
-        WTSQuerySessionInformationW == NULL ||
-        WTSFreeMemory == NULL) {
-            // If we don't run in an environment that is a Remote Desktop Services environment
-            // the Wtsapi32 proc might not be present.
-            // https://docs.microsoft.com/en-us/windows/win32/termserv/run-time-linking-to-wtsapi32-dll
-            return py_retlist;
-    }
-
-    if (WTSEnumerateSessionsW(hServer, 0, 1, &sessions, &count) == 0) {
-        if (ERROR_CALL_NOT_IMPLEMENTED == GetLastError()) {
-            // On Windows Nano server, the Wtsapi32 API can be present, but return WinError 120.
-            return py_retlist;
-        }
-        PyErr_SetFromOSErrnoWithSyscall("WTSEnumerateSessionsW");
-        goto error;
-    }
-
-    for (i = 0; i < count; i++) {
-        py_address = NULL;
-        py_tuple = NULL;
-        sessionId = sessions[i].SessionId;
-        if (buffer_user != NULL)
-            WTSFreeMemory(buffer_user);
-        if (buffer_addr != NULL)
-            WTSFreeMemory(buffer_addr);
-        if (buffer_info != NULL)
-            WTSFreeMemory(buffer_info);
-
-        buffer_user = NULL;
-        buffer_addr = NULL;
-        buffer_info = NULL;
-
-        // username
-        bytes = 0;
-        if (WTSQuerySessionInformationW(hServer, sessionId, WTSUserName,
-                                        &buffer_user, &bytes) == 0) {
-            PyErr_SetFromOSErrnoWithSyscall("WTSQuerySessionInformationW");
-            goto error;
-        }
-        if (bytes <= 2)
-            continue;
-
-        // address
-        bytes = 0;
-        if (WTSQuerySessionInformationW(hServer, sessionId, WTSClientAddress,
-                                        &buffer_addr, &bytes) == 0) {
-            PyErr_SetFromOSErrnoWithSyscall("WTSQuerySessionInformationW");
-            goto error;
-        }
-
-        address = (PWTS_CLIENT_ADDRESS)buffer_addr;
-        if (address->AddressFamily == 2) {  // AF_INET == 2
-            sprintf_s(address_str,
-                      _countof(address_str),
-                      "%u.%u.%u.%u",
-                      // The IP address is offset by two bytes from the start of the Address member of the WTS_CLIENT_ADDRESS structure.
-                      address->Address[2],
-                      address->Address[3],
-                      address->Address[4],
-                      address->Address[5]);
-            py_address = Py_BuildValue("s", address_str);
-            if (!py_address)
-                goto error;
-        }
-        else {
-            py_address = Py_None;
-        }
-
-        // login time
-        bytes = 0;
-        if (WTSQuerySessionInformationW(hServer, sessionId, WTSSessionInfo,
-                                        &buffer_info, &bytes) == 0) {
-            PyErr_SetFromOSErrnoWithSyscall("WTSQuerySessionInformationW");
-            goto error;
-        }
-        wts_info = (PWTSINFOW)buffer_info;
-
-        py_username = PyUnicode_FromWideChar(buffer_user, wcslen(buffer_user));
-        if (py_username == NULL)
-            goto error;
-
-        py_tuple = Py_BuildValue(
-            "OOd",
-            py_username,
-            py_address,
-            psutil_LargeIntegerToUnixTime(wts_info->ConnectTime)
-        );
-        if (!py_tuple)
-            goto error;
-        if (PyList_Append(py_retlist, py_tuple))
-            goto error;
-        Py_CLEAR(py_username);
-        Py_CLEAR(py_address);
-        Py_CLEAR(py_tuple);
-    }
-
-    WTSFreeMemory(sessions);
-    WTSFreeMemory(buffer_user);
-    WTSFreeMemory(buffer_addr);
-    WTSFreeMemory(buffer_info);
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_username);
-    Py_XDECREF(py_tuple);
-    Py_XDECREF(py_address);
-    Py_DECREF(py_retlist);
-
-    if (sessions != NULL)
-        WTSFreeMemory(sessions);
-    if (buffer_user != NULL)
-        WTSFreeMemory(buffer_user);
-    if (buffer_addr != NULL)
-        WTSFreeMemory(buffer_addr);
-    if (buffer_info != NULL)
-        WTSFreeMemory(buffer_info);
-    return NULL;
-}
-
-
-/*
- * Return the number of handles opened by process.
- */
-static PyObject *
-psutil_proc_num_handles(PyObject *self, PyObject *args) {
-    DWORD pid;
-    HANDLE hProcess;
-    DWORD handleCount;
-
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        return NULL;
-    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
-    if (NULL == hProcess)
-        return NULL;
-    if (! GetProcessHandleCount(hProcess, &handleCount)) {
-        PyErr_SetFromWindowsErr(0);
-        CloseHandle(hProcess);
-        return NULL;
-    }
-    CloseHandle(hProcess);
-    return Py_BuildValue("k", handleCount);
-}
-
-
-static char *get_region_protection_string(ULONG protection) {
-    switch (protection & 0xff) {
-        case PAGE_NOACCESS:
-            return "";
-        case PAGE_READONLY:
-            return "r";
-        case PAGE_READWRITE:
-            return "rw";
-        case PAGE_WRITECOPY:
-            return "wc";
-        case PAGE_EXECUTE:
-            return "x";
-        case PAGE_EXECUTE_READ:
-            return "xr";
-        case PAGE_EXECUTE_READWRITE:
-            return "xrw";
-        case PAGE_EXECUTE_WRITECOPY:
-            return "xwc";
-        default:
-            return "?";
-    }
-}
-
-
-/*
- * Return a list of process's memory mappings.
- */
-static PyObject *
-psutil_proc_memory_maps(PyObject *self, PyObject *args) {
-    MEMORY_BASIC_INFORMATION basicInfo;
-    DWORD pid;
-    HANDLE hProcess = NULL;
-    PVOID baseAddress;
-    WCHAR mappedFileName[MAX_PATH];
-    LPVOID maxAddr;
-    // required by GetMappedFileNameW
-    DWORD access = PROCESS_QUERY_INFORMATION | PROCESS_VM_READ;
-    PyObject *py_retlist = PyList_New(0);
-    PyObject *py_tuple = NULL;
-    PyObject *py_str = NULL;
-
-    if (py_retlist == NULL)
-        return NULL;
-    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
-        goto error;
-    hProcess = psutil_handle_from_pid(pid, access);
-    if (NULL == hProcess)
-        goto error;
-
-    maxAddr = PSUTIL_SYSTEM_INFO.lpMaximumApplicationAddress;
-    baseAddress = NULL;
-
-    while (VirtualQueryEx(hProcess, baseAddress, &basicInfo,
-                          sizeof(MEMORY_BASIC_INFORMATION)))
-    {
-        py_tuple = NULL;
-        if (baseAddress > maxAddr)
-            break;
-        if (GetMappedFileNameW(hProcess, baseAddress, mappedFileName,
-                               sizeof(mappedFileName)))
-        {
-            py_str = PyUnicode_FromWideChar(mappedFileName,
-                                            wcslen(mappedFileName));
-            if (py_str == NULL)
-                goto error;
-#ifdef _WIN64
-           py_tuple = Py_BuildValue(
-              "(KsOI)",
-              (unsigned long long)baseAddress,
-#else
-           py_tuple = Py_BuildValue(
-              "(ksOI)",
-              (unsigned long)baseAddress,
-#endif
-              get_region_protection_string(basicInfo.Protect),
-              py_str,
-              basicInfo.RegionSize);
-
-            if (!py_tuple)
-                goto error;
-            if (PyList_Append(py_retlist, py_tuple))
-                goto error;
-            Py_CLEAR(py_tuple);
-            Py_CLEAR(py_str);
-        }
-        baseAddress = (PCHAR)baseAddress + basicInfo.RegionSize;
-    }
-
-    CloseHandle(hProcess);
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_tuple);
-    Py_XDECREF(py_str);
-    Py_DECREF(py_retlist);
-    if (hProcess != NULL)
-        CloseHandle(hProcess);
-    return NULL;
-}
-
-
-/*
- * Return a {pid:ppid, ...} dict for all running processes.
- */
-static PyObject *
-psutil_ppid_map(PyObject *self, PyObject *args) {
-    PyObject *py_pid = NULL;
-    PyObject *py_ppid = NULL;
-    PyObject *py_retdict = PyDict_New();
-    HANDLE handle = NULL;
-    PROCESSENTRY32 pe = {0};
-    pe.dwSize = sizeof(PROCESSENTRY32);
-
-    if (py_retdict == NULL)
-        return NULL;
-    handle = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
-    if (handle == INVALID_HANDLE_VALUE) {
-        PyErr_SetFromWindowsErr(0);
-        Py_DECREF(py_retdict);
-        return NULL;
-    }
-
-    if (Process32First(handle, &pe)) {
-        do {
-            py_pid = PyLong_FromPid(pe.th32ProcessID);
-            if (py_pid == NULL)
-                goto error;
-            py_ppid = PyLong_FromPid(pe.th32ParentProcessID);
-            if (py_ppid == NULL)
-                goto error;
-            if (PyDict_SetItem(py_retdict, py_pid, py_ppid))
-                goto error;
-            Py_CLEAR(py_pid);
-            Py_CLEAR(py_ppid);
-        } while (Process32Next(handle, &pe));
-    }
-
-    CloseHandle(handle);
-    return py_retdict;
-
-error:
-    Py_XDECREF(py_pid);
-    Py_XDECREF(py_ppid);
-    Py_DECREF(py_retdict);
-    CloseHandle(handle);
-    return NULL;
-}
-
-
-/*
- * Return battery usage stats.
- */
-static PyObject *
-psutil_sensors_battery(PyObject *self, PyObject *args) {
-    SYSTEM_POWER_STATUS sps;
-
-    if (GetSystemPowerStatus(&sps) == 0) {
-        PyErr_SetFromWindowsErr(0);
-        return NULL;
-    }
-    return Py_BuildValue(
-        "iiiI",
-        sps.ACLineStatus,  // whether AC is connected: 0=no, 1=yes, 255=unknown
-        // status flag:
-        // 1, 2, 4 = high, low, critical
-        // 8 = charging
-        // 128 = no battery
-        sps.BatteryFlag,
-        sps.BatteryLifePercent,  // percent
-        sps.BatteryLifeTime  // remaining secs
-    );
-}
-
-
-/*
- * System memory page size as an int.
- */
-static PyObject *
-psutil_getpagesize(PyObject *self, PyObject *args) {
-    // XXX: we may want to use GetNativeSystemInfo to differentiate
-    // page size for WoW64 processes (but am not sure).
-    return Py_BuildValue("I", PSUTIL_SYSTEM_INFO.dwPageSize);
-}
-
 
 // ------------------------ Python init ---------------------------
 
@@ -1551,127 +40,73 @@ static PyMethodDef
 PsutilMethods[] = {
     // --- per-process functions
     {"proc_cmdline", (PyCFunction)(void(*)(void))psutil_proc_cmdline,
-        METH_VARARGS | METH_KEYWORDS,
-     "Return process cmdline as a list of cmdline arguments"},
-    {"proc_environ", psutil_proc_environ, METH_VARARGS,
-     "Return process environment data"},
-    {"proc_exe", psutil_proc_exe, METH_VARARGS,
-     "Return path of the process executable"},
-    {"proc_kill", psutil_proc_kill, METH_VARARGS,
-     "Kill the process identified by the given PID"},
-    {"proc_times", psutil_proc_times, METH_VARARGS,
-     "Return tuple of user/kern time for the given PID"},
-    {"proc_memory_info", psutil_proc_memory_info, METH_VARARGS,
-     "Return a tuple of process memory information"},
-    {"proc_memory_uss", psutil_proc_memory_uss, METH_VARARGS,
-     "Return the USS of the process"},
-    {"proc_cwd", psutil_proc_cwd, METH_VARARGS,
-     "Return process current working directory"},
-    {"proc_suspend_or_resume", psutil_proc_suspend_or_resume, METH_VARARGS,
-     "Suspend or resume a process"},
-    {"proc_open_files", psutil_proc_open_files, METH_VARARGS,
-     "Return files opened by process"},
-    {"proc_username", psutil_proc_username, METH_VARARGS,
-     "Return the username of a process"},
-    {"proc_threads", psutil_proc_threads, METH_VARARGS,
-     "Return process threads information as a list of tuple"},
-    {"proc_wait", psutil_proc_wait, METH_VARARGS,
-     "Wait for process to terminate and return its exit code."},
-    {"proc_priority_get", psutil_proc_priority_get, METH_VARARGS,
-     "Return process priority."},
-    {"proc_priority_set", psutil_proc_priority_set, METH_VARARGS,
-     "Set process priority."},
-    {"proc_io_priority_get", psutil_proc_io_priority_get, METH_VARARGS,
-     "Return process IO priority."},
-    {"proc_io_priority_set", psutil_proc_io_priority_set, METH_VARARGS,
-     "Set process IO priority."},
-    {"proc_cpu_affinity_get", psutil_proc_cpu_affinity_get, METH_VARARGS,
-     "Return process CPU affinity as a bitmask."},
-    {"proc_cpu_affinity_set", psutil_proc_cpu_affinity_set, METH_VARARGS,
-     "Set process CPU affinity."},
-    {"proc_io_counters", psutil_proc_io_counters, METH_VARARGS,
-     "Get process I/O counters."},
-    {"proc_is_suspended", psutil_proc_is_suspended, METH_VARARGS,
-     "Return True if one of the process threads is in a suspended state"},
-    {"proc_num_handles", psutil_proc_num_handles, METH_VARARGS,
-     "Return the number of handles opened by process."},
-    {"proc_memory_maps", psutil_proc_memory_maps, METH_VARARGS,
-     "Return a list of process's memory mappings"},
+     METH_VARARGS | METH_KEYWORDS},
+    {"proc_cpu_affinity_get", psutil_proc_cpu_affinity_get, METH_VARARGS},
+    {"proc_cpu_affinity_set", psutil_proc_cpu_affinity_set, METH_VARARGS},
+    {"proc_cwd", psutil_proc_cwd, METH_VARARGS},
+    {"proc_environ", psutil_proc_environ, METH_VARARGS},
+    {"proc_exe", psutil_proc_exe, METH_VARARGS},
+    {"proc_io_counters", psutil_proc_io_counters, METH_VARARGS},
+    {"proc_io_priority_get", psutil_proc_io_priority_get, METH_VARARGS},
+    {"proc_io_priority_set", psutil_proc_io_priority_set, METH_VARARGS},
+    {"proc_is_suspended", psutil_proc_is_suspended, METH_VARARGS},
+    {"proc_kill", psutil_proc_kill, METH_VARARGS},
+    {"proc_memory_info", psutil_proc_memory_info, METH_VARARGS},
+    {"proc_memory_maps", psutil_proc_memory_maps, METH_VARARGS},
+    {"proc_memory_uss", psutil_proc_memory_uss, METH_VARARGS},
+    {"proc_num_handles", psutil_proc_num_handles, METH_VARARGS},
+    {"proc_open_files", psutil_proc_open_files, METH_VARARGS},
+    {"proc_priority_get", psutil_proc_priority_get, METH_VARARGS},
+    {"proc_priority_set", psutil_proc_priority_set, METH_VARARGS},
+    {"proc_suspend_or_resume", psutil_proc_suspend_or_resume, METH_VARARGS},
+    {"proc_threads", psutil_proc_threads, METH_VARARGS},
+    {"proc_times", psutil_proc_times, METH_VARARGS},
+    {"proc_username", psutil_proc_username, METH_VARARGS},
+    {"proc_wait", psutil_proc_wait, METH_VARARGS},
 
     // --- alternative pinfo interface
-    {"proc_info", psutil_proc_info, METH_VARARGS,
-     "Various process information"},
+    {"proc_info", psutil_proc_info, METH_VARARGS},
 
     // --- system-related functions
-    {"pids", psutil_pids, METH_VARARGS,
-     "Returns a list of PIDs currently running on the system"},
-    {"ppid_map", psutil_ppid_map, METH_VARARGS,
-     "Return a {pid:ppid, ...} dict for all running processes"},
-    {"pid_exists", psutil_pid_exists, METH_VARARGS,
-     "Determine if the process exists in the current process list."},
-    {"cpu_count_logical", psutil_cpu_count_logical, METH_VARARGS,
-     "Returns the number of logical CPUs on the system"},
-    {"cpu_count_phys", psutil_cpu_count_phys, METH_VARARGS,
-     "Returns the number of physical CPUs on the system"},
-    {"boot_time", psutil_boot_time, METH_VARARGS,
-     "Return the system boot time expressed in seconds since the epoch."},
-    {"virtual_mem", psutil_virtual_mem, METH_VARARGS,
-     "Return the total amount of physical memory, in bytes"},
-    {"cpu_times", psutil_cpu_times, METH_VARARGS,
-     "Return system cpu times as a list"},
-    {"per_cpu_times", psutil_per_cpu_times, METH_VARARGS,
-     "Return system per-cpu times as a list of tuples"},
-    {"disk_usage", psutil_disk_usage, METH_VARARGS,
-     "Return path's disk total and free as a Python tuple."},
-    {"net_io_counters", psutil_net_io_counters, METH_VARARGS,
-     "Return dict of tuples of networks I/O information."},
-    {"disk_io_counters", psutil_disk_io_counters, METH_VARARGS,
-     "Return dict of tuples of disks I/O information."},
-    {"users", psutil_users, METH_VARARGS,
-     "Return a list of currently connected users."},
-    {"disk_partitions", psutil_disk_partitions, METH_VARARGS,
-     "Return disk partitions."},
-    {"net_connections", psutil_net_connections, METH_VARARGS,
-     "Return system-wide connections"},
-    {"net_if_addrs", psutil_net_if_addrs, METH_VARARGS,
-     "Return NICs addresses."},
-    {"net_if_stats", psutil_net_if_stats, METH_VARARGS,
-     "Return NICs stats."},
-    {"cpu_stats", psutil_cpu_stats, METH_VARARGS,
-     "Return NICs stats."},
-    {"cpu_freq", psutil_cpu_freq, METH_VARARGS,
-     "Return CPU frequency."},
-    {"init_loadavg_counter", (PyCFunction)psutil_init_loadavg_counter,
-     METH_VARARGS,
-     "Initializes the emulated load average calculator."},
-    {"getloadavg", (PyCFunction)psutil_get_loadavg, METH_VARARGS,
-     "Returns the emulated POSIX-like load average."},
-    {"sensors_battery", psutil_sensors_battery, METH_VARARGS,
-     "Return battery metrics usage."},
-    {"getpagesize", psutil_getpagesize, METH_VARARGS,
-     "Return system memory page size."},
+    {"boot_time", psutil_boot_time, METH_VARARGS},
+    {"cpu_count_cores", psutil_cpu_count_cores, METH_VARARGS},
+    {"cpu_count_logical", psutil_cpu_count_logical, METH_VARARGS},
+    {"cpu_freq", psutil_cpu_freq, METH_VARARGS},
+    {"cpu_stats", psutil_cpu_stats, METH_VARARGS},
+    {"cpu_times", psutil_cpu_times, METH_VARARGS},
+    {"disk_io_counters", psutil_disk_io_counters, METH_VARARGS},
+    {"disk_partitions", psutil_disk_partitions, METH_VARARGS},
+    {"disk_usage", psutil_disk_usage, METH_VARARGS},
+    {"getloadavg", (PyCFunction)psutil_get_loadavg, METH_VARARGS},
+    {"getpagesize", psutil_getpagesize, METH_VARARGS},
+    {"swap_percent", psutil_swap_percent, METH_VARARGS},
+    {"init_loadavg_counter", (PyCFunction)psutil_init_loadavg_counter, METH_VARARGS},
+    {"net_connections", psutil_net_connections, METH_VARARGS},
+    {"net_if_addrs", psutil_net_if_addrs, METH_VARARGS},
+    {"net_if_stats", psutil_net_if_stats, METH_VARARGS},
+    {"net_io_counters", psutil_net_io_counters, METH_VARARGS},
+    {"per_cpu_times", psutil_per_cpu_times, METH_VARARGS},
+    {"pid_exists", psutil_pid_exists, METH_VARARGS},
+    {"pids", psutil_pids, METH_VARARGS},
+    {"ppid_map", psutil_ppid_map, METH_VARARGS},
+    {"sensors_battery", psutil_sensors_battery, METH_VARARGS},
+    {"users", psutil_users, METH_VARARGS},
+    {"virtual_mem", psutil_virtual_mem, METH_VARARGS},
 
     // --- windows services
-    {"winservice_enumerate", psutil_winservice_enumerate, METH_VARARGS,
-     "List all services"},
-    {"winservice_query_config", psutil_winservice_query_config, METH_VARARGS,
-     "Return service config"},
-    {"winservice_query_status", psutil_winservice_query_status, METH_VARARGS,
-     "Return service config"},
-    {"winservice_query_descr", psutil_winservice_query_descr, METH_VARARGS,
-     "Return the description of a service"},
-    {"winservice_start", psutil_winservice_start, METH_VARARGS,
-     "Start a service"},
-    {"winservice_stop", psutil_winservice_stop, METH_VARARGS,
-     "Stop a service"},
+    {"winservice_enumerate", psutil_winservice_enumerate, METH_VARARGS},
+    {"winservice_query_config", psutil_winservice_query_config, METH_VARARGS},
+    {"winservice_query_descr", psutil_winservice_query_descr, METH_VARARGS},
+    {"winservice_query_status", psutil_winservice_query_status, METH_VARARGS},
+    {"winservice_start", psutil_winservice_start, METH_VARARGS},
+    {"winservice_stop", psutil_winservice_stop, METH_VARARGS},
 
     // --- windows API bindings
-    {"win32_QueryDosDevice", psutil_win32_QueryDosDevice, METH_VARARGS,
-     "QueryDosDevice binding"},
+    {"QueryDosDevice", psutil_QueryDosDevice, METH_VARARGS},
 
     // --- others
-    {"set_testing", psutil_set_testing, METH_NOARGS,
-     "Set psutil in testing mode"},
+    {"check_pid_range", psutil_check_pid_range, METH_VARARGS},
+    {"set_debug", psutil_set_debug, METH_VARARGS},
 
     {NULL, NULL, 0, NULL}
 };
@@ -1732,8 +167,6 @@ void init_psutil_windows(void)
 
     if (psutil_setup() != 0)
         INITERROR;
-    if (psutil_load_globals() != 0)
-        INITERROR;
     if (psutil_set_se_debug() != 0)
         INITERROR;
 
diff --git a/contrib/python/psutil/py3/psutil/_pswindows.py b/contrib/python/psutil/py3/psutil/_pswindows.py
index 98baef5955..2d3a0c9fdb 100644
--- a/contrib/python/psutil/py3/psutil/_pswindows.py
+++ b/contrib/python/psutil/py3/psutil/_pswindows.py
@@ -14,22 +14,22 @@ import time
 from collections import namedtuple
 
 from . import _common
+from ._common import ENCODING
+from ._common import ENCODING_ERRS
 from ._common import AccessDenied
+from ._common import NoSuchProcess
+from ._common import TimeoutExpired
 from ._common import conn_tmap
 from ._common import conn_to_ntuple
 from ._common import debug
-from ._common import ENCODING
-from ._common import ENCODING_ERRS
 from ._common import isfile_strict
 from ._common import memoize
 from ._common import memoize_when_activated
-from ._common import NoSuchProcess
 from ._common import parse_environ_block
-from ._common import TimeoutExpired
 from ._common import usage_percent
+from ._compat import PY3
 from ._compat import long
 from ._compat import lru_cache
-from ._compat import PY3
 from ._compat import range
 from ._compat import unicode
 from ._psutil_windows import ABOVE_NORMAL_PRIORITY_CLASS
@@ -39,11 +39,14 @@ from ._psutil_windows import IDLE_PRIORITY_CLASS
 from ._psutil_windows import NORMAL_PRIORITY_CLASS
 from ._psutil_windows import REALTIME_PRIORITY_CLASS
 
+
 try:
     from . import _psutil_windows as cext
 except ImportError as err:
-    if str(err).lower().startswith("dll load failed") and \
-            sys.getwindowsversion()[0] < 6:
+    if (
+        str(err).lower().startswith("dll load failed")
+        and sys.getwindowsversion()[0] < 6
+    ):
         # We may get here if:
         # 1) we are on an old Windows version
         # 2) psutil was installed via pip + wheel
@@ -55,13 +58,14 @@ except ImportError as err:
     else:
         raise
 
-if sys.version_info >= (3, 4):
+if PY3:
     import enum
 else:
     enum = None
 
 # process priority constants, import from __init__.py:
 # http://msdn.microsoft.com/en-us/library/ms686219(v=vs.85).aspx
+# fmt: off
 __extra__all__ = [
     "win_service_iter", "win_service_get",
     # Process priority
@@ -73,6 +77,7 @@ __extra__all__ = [
     # others
     "CONN_DELETE_TCB", "AF_LINK",
 ]
+# fmt: on
 
 
 # =====================================================================
@@ -106,6 +111,7 @@ TCP_STATUSES = {
 }
 
 if enum is not None:
+
     class Priority(enum.IntEnum):
         ABOVE_NORMAL_PRIORITY_CLASS = ABOVE_NORMAL_PRIORITY_CLASS
         BELOW_NORMAL_PRIORITY_CLASS = BELOW_NORMAL_PRIORITY_CLASS
@@ -122,11 +128,13 @@ if enum is None:
     IOPRIO_NORMAL = 2
     IOPRIO_HIGH = 3
 else:
+
     class IOPriority(enum.IntEnum):
         IOPRIO_VERYLOW = 0
         IOPRIO_LOW = 1
         IOPRIO_NORMAL = 2
         IOPRIO_HIGH = 3
+
     globals().update(IOPriority.__members__)
 
 pinfo_map = dict(
@@ -160,6 +168,7 @@ pinfo_map = dict(
 # =====================================================================
 
 
+# fmt: off
 # psutil.cpu_times()
 scputimes = namedtuple('scputimes',
                        ['user', 'system', 'idle', 'interrupt', 'dpc'])
@@ -182,6 +191,7 @@ pmmap_ext = namedtuple(
 pio = namedtuple('pio', ['read_count', 'write_count',
                          'read_bytes', 'write_bytes',
                          'other_count', 'other_bytes'])
+# fmt: on
 
 
 # =====================================================================
@@ -194,11 +204,11 @@ def convert_dos_path(s):
     r"""Convert paths using native DOS format like:
         "\Device\HarddiskVolume1\Windows\systemew\file.txt"
     into:
-        "C:\Windows\systemew\file.txt"
+        "C:\Windows\systemew\file.txt".
     """
     rawdrive = '\\'.join(s.split('\\')[:3])
-    driveletter = cext.win32_QueryDosDevice(rawdrive)
-    remainder = s[len(rawdrive):]
+    driveletter = cext.QueryDosDevice(rawdrive)
+    remainder = s[len(rawdrive) :]
     return os.path.join(driveletter, remainder)
 
 
@@ -228,7 +238,7 @@ def getpagesize():
 def virtual_memory():
     """System virtual memory as a namedtuple."""
     mem = cext.virtual_mem()
-    totphys, availphys, totpagef, availpagef, totvirt, freevirt = mem
+    totphys, availphys, totsys, availsys = mem
     #
     total = totphys
     avail = availphys
@@ -241,10 +251,26 @@ def virtual_memory():
 def swap_memory():
     """Swap system memory as a (total, used, free, sin, sout) tuple."""
     mem = cext.virtual_mem()
-    total = mem[2]
-    free = mem[3]
-    used = total - free
-    percent = usage_percent(used, total, round_=1)
+
+    total_phys = mem[0]
+    total_system = mem[2]
+
+    # system memory (commit total/limit) is the sum of physical and swap
+    # thus physical memory values need to be subtracted to get swap values
+    total = total_system - total_phys
+    # commit total is incremented immediately (decrementing free_system)
+    # while the corresponding free physical value is not decremented until
+    # pages are accessed, so we can't use free system memory for swap.
+    # instead, we calculate page file usage based on performance counter
+    if total > 0:
+        percentswap = cext.swap_percent()
+        used = int(0.01 * percentswap * total)
+    else:
+        percentswap = 0.0
+        used = 0
+
+    free = total - used
+    percent = round(percentswap, 1)
     return _common.sswap(total, used, free, percent, 0, 0)
 
 
@@ -286,8 +312,9 @@ def cpu_times():
     # interrupt and dpc times. cext.per_cpu_times() does, so we
     # rely on it to get those only.
     percpu_summed = scputimes(*[sum(n) for n in zip(*cext.per_cpu_times())])
-    return scputimes(user, system, idle,
-                     percpu_summed.interrupt, percpu_summed.dpc)
+    return scputimes(
+        user, system, idle, percpu_summed.interrupt, percpu_summed.dpc
+    )
 
 
 def per_cpu_times():
@@ -304,17 +331,18 @@ def cpu_count_logical():
     return cext.cpu_count_logical()
 
 
-def cpu_count_physical():
-    """Return the number of physical CPU cores in the system."""
-    return cext.cpu_count_phys()
+def cpu_count_cores():
+    """Return the number of CPU cores in the system."""
+    return cext.cpu_count_cores()
 
 
 def cpu_stats():
     """Return CPU statistics."""
     ctx_switches, interrupts, dpcs, syscalls = cext.cpu_stats()
     soft_interrupts = 0
-    return _common.scpustats(ctx_switches, interrupts, soft_interrupts,
-                             syscalls)
+    return _common.scpustats(
+        ctx_switches, interrupts, soft_interrupts, syscalls
+    )
 
 
 def cpu_freq():
@@ -331,7 +359,8 @@ _loadavg_inititialized = False
 
 def getloadavg():
     """Return the number of processes in the system run queue averaged
-    over the last 1, 5, and 15 minutes respectively as a tuple"""
+    over the last 1, 5, and 15 minutes respectively as a tuple.
+    """
     global _loadavg_inititialized
 
     if not _loadavg_inititialized:
@@ -353,15 +382,25 @@ def net_connections(kind, _pid=-1):
     connections (as opposed to connections opened by one process only).
     """
     if kind not in conn_tmap:
-        raise ValueError("invalid %r kind argument; choose between %s"
-                         % (kind, ', '.join([repr(x) for x in conn_tmap])))
+        raise ValueError(
+            "invalid %r kind argument; choose between %s"
+            % (kind, ', '.join([repr(x) for x in conn_tmap]))
+        )
     families, types = conn_tmap[kind]
     rawlist = cext.net_connections(_pid, families, types)
     ret = set()
     for item in rawlist:
         fd, fam, type, laddr, raddr, status, pid = item
-        nt = conn_to_ntuple(fd, fam, type, laddr, raddr, status, TCP_STATUSES,
-                            pid=pid if _pid == -1 else None)
+        nt = conn_to_ntuple(
+            fd,
+            fam,
+            type,
+            laddr,
+            raddr,
+            status,
+            TCP_STATUSES,
+            pid=pid if _pid == -1 else None,
+        )
         ret.add(nt)
     return list(ret)
 
@@ -377,7 +416,7 @@ def net_if_stats():
         isup, duplex, speed, mtu = items
         if hasattr(_common, 'NicDuplex'):
             duplex = _common.NicDuplex(duplex)
-        ret[name] = _common.snicstats(isup, duplex, speed, mtu)
+        ret[name] = _common.snicstats(isup, duplex, speed, mtu, '')
     return ret
 
 
@@ -476,7 +515,7 @@ def win_service_get(name):
     return service
 
 
-class WindowsService(object):
+class WindowsService:
     """Represents an installed Windows service."""
 
     def __init__(self, name, display_name):
@@ -485,7 +524,9 @@ class WindowsService(object):
 
     def __str__(self):
         details = "(name=%r, display_name=%r)" % (
-            self._name, self._display_name)
+            self._name,
+            self._display_name,
+        )
         return "%s%s" % (self.__class__.__name__, details)
 
     def __repr__(self):
@@ -503,14 +544,16 @@ class WindowsService(object):
 
     def _query_config(self):
         with self._wrap_exceptions():
-            display_name, binpath, username, start_type = \
+            display_name, binpath, username, start_type = (
                 cext.winservice_query_config(self._name)
+            )
         # XXX - update _self.display_name?
         return dict(
             display_name=py2_strencode(display_name),
             binpath=py2_strencode(binpath),
             username=py2_strencode(username),
-            start_type=py2_strencode(start_type))
+            start_type=py2_strencode(start_type),
+        )
 
     def _query_status(self):
         with self._wrap_exceptions():
@@ -528,15 +571,17 @@ class WindowsService(object):
             yield
         except OSError as err:
             if is_permission_err(err):
-                raise AccessDenied(
-                    pid=None, name=self._name,
-                    msg="service %r is not querable (not enough privileges)" %
-                        self._name)
-            elif err.winerror in (cext.ERROR_INVALID_NAME,
-                                  cext.ERROR_SERVICE_DOES_NOT_EXIST):
-                raise NoSuchProcess(
-                    pid=None, name=self._name,
-                    msg="service %r does not exist)" % self._name)
+                msg = (
+                    "service %r is not querable (not enough privileges)"
+                    % self._name
+                )
+                raise AccessDenied(pid=None, name=self._name, msg=msg)
+            elif err.winerror in (
+                cext.ERROR_INVALID_NAME,
+                cext.ERROR_SERVICE_DOES_NOT_EXIST,
+            ):
+                msg = "service %r does not exist" % self._name
+                raise NoSuchProcess(pid=None, name=self._name, msg=msg)
             else:
                 raise
 
@@ -653,12 +698,17 @@ ppid_map = cext.ppid_map  # used internally by Process.children()
 def is_permission_err(exc):
     """Return True if this is a permission error."""
     assert isinstance(exc, OSError), exc
+    if exc.errno in (errno.EPERM, errno.EACCES):
+        return True
     # On Python 2 OSError doesn't always have 'winerror'. Sometimes
     # it does, in which case the original exception was WindowsError
     # (which is a subclass of OSError).
-    return exc.errno in (errno.EPERM, errno.EACCES) or \
-        getattr(exc, "winerror", -1) in (cext.ERROR_ACCESS_DENIED,
-                                         cext.ERROR_PRIVILEGE_NOT_HELD)
+    if getattr(exc, "winerror", -1) in (
+        cext.ERROR_ACCESS_DENIED,
+        cext.ERROR_PRIVILEGE_NOT_HELD,
+    ):
+        return True
+    return False
 
 
 def convert_oserror(exc, pid=None, name=None):
@@ -673,24 +723,27 @@ def convert_oserror(exc, pid=None, name=None):
 
 def wrap_exceptions(fun):
     """Decorator which converts OSError into NoSuchProcess or AccessDenied."""
+
     @functools.wraps(fun)
     def wrapper(self, *args, **kwargs):
         try:
             return fun(self, *args, **kwargs)
         except OSError as err:
             raise convert_oserror(err, pid=self.pid, name=self._name)
+
     return wrapper
 
 
 def retry_error_partial_copy(fun):
     """Workaround for https://github.com/giampaolo/psutil/issues/875.
-    See: https://stackoverflow.com/questions/4457745#4457745
+    See: https://stackoverflow.com/questions/4457745#4457745.
     """
+
     @functools.wraps(fun)
     def wrapper(self, *args, **kwargs):
         delay = 0.0001
         times = 33
-        for x in range(times):  # retries for roughly 1 second
+        for _ in range(times):  # retries for roughly 1 second
             try:
                 return fun(self, *args, **kwargs)
             except WindowsError as _:
@@ -699,16 +752,17 @@ def retry_error_partial_copy(fun):
                     time.sleep(delay)
                     delay = min(delay * 2, 0.04)
                     continue
-                else:
-                    raise
-        else:
-            msg = "%s retried %s times, converted to AccessDenied as it's " \
-                "still returning %r" % (fun, times, err)
-            raise AccessDenied(pid=self.pid, name=self._name, msg=msg)
+                raise
+        msg = (
+            "{} retried {} times, converted to AccessDenied as it's still"
+            "returning {}".format(fun, times, err)
+        )
+        raise AccessDenied(pid=self.pid, name=self._name, msg=msg)
+
     return wrapper
 
 
-class Process(object):
+class Process:
     """Wrapper class around underlying C implementation."""
 
     __slots__ = ["pid", "_name", "_ppid", "_cache"]
@@ -759,7 +813,7 @@ class Process(object):
                 # 24 = ERROR_TOO_MANY_OPEN_FILES. Not sure why this happens
                 # (perhaps PyPy's JIT delaying garbage collection of files?).
                 if err.errno == 24:
-                    debug("%r forced into AccessDenied" % err)
+                    debug("%r translated into AccessDenied" % err)
                     raise AccessDenied(self.pid, self._name)
                 raise
         else:
@@ -834,14 +888,14 @@ class Process(object):
         t = self._get_raw_meminfo()
         rss = t[2]  # wset
         vms = t[7]  # pagefile
-        return pmem(*(rss, vms, ) + t)
+        return pmem(*(rss, vms) + t)
 
     @wrap_exceptions
     def memory_full_info(self):
         basic_mem = self.memory_info()
         uss = cext.proc_memory_uss(self.pid)
         uss *= getpagesize()
-        return pfullmem(*basic_mem + (uss, ))
+        return pfullmem(*basic_mem + (uss,))
 
     def memory_maps(self):
         try:
@@ -867,13 +921,17 @@ class Process(object):
         if sig == signal.SIGTERM:
             cext.proc_kill(self.pid)
         # py >= 2.7
-        elif sig in (getattr(signal, "CTRL_C_EVENT", object()),
-                     getattr(signal, "CTRL_BREAK_EVENT", object())):
+        elif sig in (
+            getattr(signal, "CTRL_C_EVENT", object()),
+            getattr(signal, "CTRL_BREAK_EVENT", object()),
+        ):
             os.kill(self.pid, sig)
         else:
-            raise ValueError(
+            msg = (
                 "only SIGTERM, CTRL_C_EVENT and CTRL_BREAK_EVENT signals "
-                "are supported on Windows")
+                "are supported on Windows"
+            )
+            raise ValueError(msg)
 
     @wrap_exceptions
     def wait(self, timeout=None):
@@ -1025,9 +1083,14 @@ class Process(object):
     @wrap_exceptions
     def ionice_set(self, ioclass, value):
         if value:
-            raise TypeError("value argument not accepted on Windows")
-        if ioclass not in (IOPRIO_VERYLOW, IOPRIO_LOW, IOPRIO_NORMAL,
-                           IOPRIO_HIGH):
+            msg = "value argument not accepted on Windows"
+            raise TypeError(msg)
+        if ioclass not in (
+            IOPRIO_VERYLOW,
+            IOPRIO_LOW,
+            IOPRIO_NORMAL,
+            IOPRIO_HIGH,
+        ):
             raise ValueError("%s is not a valid priority" % ioclass)
         cext.proc_io_priority_set(self.pid, ioclass)
 
@@ -1061,6 +1124,7 @@ class Process(object):
     def cpu_affinity_get(self):
         def from_bitmask(x):
             return [i for i in range(64) if (1 << i) & x]
+
         bitmask = cext.proc_cpu_affinity_get(self.pid)
         return from_bitmask(bitmask)
 
@@ -1071,7 +1135,7 @@ class Process(object):
                 raise ValueError("invalid argument %r" % ls)
             out = 0
             for b in ls:
-                out |= 2 ** b
+                out |= 2**b
             return out
 
         # SetProcessAffinityMask() states that ERROR_INVALID_PARAMETER
@@ -1082,7 +1146,8 @@ class Process(object):
             if cpu not in allcpus:
                 if not isinstance(cpu, (int, long)):
                     raise TypeError(
-                        "invalid CPU %r; an integer is required" % cpu)
+                        "invalid CPU %r; an integer is required" % cpu
+                    )
                 else:
                     raise ValueError("invalid CPU %r" % cpu)
 
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/disk.c b/contrib/python/psutil/py3/psutil/arch/linux/disk.c
new file mode 100644
index 0000000000..692a7d5d47
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/disk.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+#include <mntent.h>
+
+#include "../../_psutil_common.h"
+
+
+// Return disk mounted partitions as a list of tuples including device,
+// mount point and filesystem type.
+PyObject *
+psutil_disk_partitions(PyObject *self, PyObject *args) {
+    FILE *file = NULL;
+    struct mntent *entry;
+    char *mtab_path;
+    PyObject *py_dev = NULL;
+    PyObject *py_mountp = NULL;
+    PyObject *py_tuple = NULL;
+    PyObject *py_retlist = PyList_New(0);
+
+    if (py_retlist == NULL)
+        return NULL;
+
+    if (!PyArg_ParseTuple(args, "s", &mtab_path))
+        return NULL;
+
+    Py_BEGIN_ALLOW_THREADS
+    file = setmntent(mtab_path, "r");
+    Py_END_ALLOW_THREADS
+    if ((file == 0) || (file == NULL)) {
+        psutil_debug("setmntent() failed");
+        PyErr_SetFromErrnoWithFilename(PyExc_OSError, mtab_path);
+        goto error;
+    }
+
+    while ((entry = getmntent(file))) {
+        if (entry == NULL) {
+            PyErr_Format(PyExc_RuntimeError, "getmntent() syscall failed");
+            goto error;
+        }
+        py_dev = PyUnicode_DecodeFSDefault(entry->mnt_fsname);
+        if (! py_dev)
+            goto error;
+        py_mountp = PyUnicode_DecodeFSDefault(entry->mnt_dir);
+        if (! py_mountp)
+            goto error;
+        py_tuple = Py_BuildValue("(OOss)",
+                                 py_dev,             // device
+                                 py_mountp,          // mount point
+                                 entry->mnt_type,    // fs type
+                                 entry->mnt_opts);   // options
+        if (! py_tuple)
+            goto error;
+        if (PyList_Append(py_retlist, py_tuple))
+            goto error;
+        Py_CLEAR(py_dev);
+        Py_CLEAR(py_mountp);
+        Py_CLEAR(py_tuple);
+    }
+    endmntent(file);
+    return py_retlist;
+
+error:
+    if (file != NULL)
+        endmntent(file);
+    Py_XDECREF(py_dev);
+    Py_XDECREF(py_mountp);
+    Py_XDECREF(py_tuple);
+    Py_DECREF(py_retlist);
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/disk.h b/contrib/python/psutil/py3/psutil/arch/linux/disk.h
new file mode 100644
index 0000000000..90a86d611b
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/disk.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_disk_partitions(PyObject* self, PyObject* args);
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/mem.c b/contrib/python/psutil/py3/psutil/arch/linux/mem.c
new file mode 100644
index 0000000000..3b9b4fef3f
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/mem.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+#include <sys/sysinfo.h>
+
+#include "../../_psutil_common.h"
+
+
+PyObject *
+psutil_linux_sysinfo(PyObject *self, PyObject *args) {
+    struct sysinfo info;
+
+    if (sysinfo(&info) != 0)
+        return PyErr_SetFromErrno(PyExc_OSError);
+    // note: boot time might also be determined from here
+    return Py_BuildValue(
+        "(kkkkkkI)",
+        info.totalram,  // total
+        info.freeram,  // free
+        info.bufferram, // buffer
+        info.sharedram, // shared
+        info.totalswap, // swap tot
+        info.freeswap,  // swap free
+        info.mem_unit  // multiplier
+    );
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/mem.h b/contrib/python/psutil/py3/psutil/arch/linux/mem.h
new file mode 100644
index 0000000000..582d3e0314
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/mem.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_linux_sysinfo(PyObject* self, PyObject* args);
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/net.c b/contrib/python/psutil/py3/psutil/arch/linux/net.c
new file mode 100644
index 0000000000..d193e94087
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/net.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+#include <linux/sockios.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <linux/if.h>
+#include <linux/version.h>
+#include <unistd.h>
+
+// see: https://github.com/giampaolo/psutil/issues/659
+#ifdef PSUTIL_ETHTOOL_MISSING_TYPES
+    #include <linux/types.h>
+    typedef __u64 u64;
+    typedef __u32 u32;
+    typedef __u16 u16;
+    typedef __u8 u8;
+#endif
+
+// Avoid redefinition of struct sysinfo with musl libc.
+#define _LINUX_SYSINFO_H
+#include <linux/ethtool.h>
+
+#include "../../_psutil_common.h"
+
+
+// * defined in linux/ethtool.h but not always available (e.g. Android)
+// * #ifdef check needed for old kernels, see:
+//   https://github.com/giampaolo/psutil/issues/2164
+static inline uint32_t
+psutil_ethtool_cmd_speed(const struct ethtool_cmd *ecmd) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 27)
+    return ecmd->speed;
+#else
+    return (ecmd->speed_hi << 16) | ecmd->speed;
+#endif
+}
+
+// May happen on old RedHat versions, see:
+// https://github.com/giampaolo/psutil/issues/607
+#ifndef DUPLEX_UNKNOWN
+    #define DUPLEX_UNKNOWN 0xff
+#endif
+// https://github.com/giampaolo/psutil/pull/2156
+#ifndef SPEED_UNKNOWN
+    #define SPEED_UNKNOWN -1
+#endif
+
+
+// References:
+// * https://github.com/dpaleino/wicd/blob/master/wicd/backends/be-ioctl.py
+// * http://www.i-scream.org/libstatgrab/
+PyObject*
+psutil_net_if_duplex_speed(PyObject* self, PyObject* args) {
+    char *nic_name;
+    int sock = 0;
+    int ret;
+    int duplex;
+    __u32 uint_speed;
+    int speed;
+    struct ifreq ifr;
+    struct ethtool_cmd ethcmd;
+    PyObject *py_retlist = NULL;
+
+    if (! PyArg_ParseTuple(args, "s", &nic_name))
+        return NULL;
+
+    sock = socket(AF_INET, SOCK_DGRAM, 0);
+    if (sock == -1)
+        return PyErr_SetFromOSErrnoWithSyscall("socket()");
+    PSUTIL_STRNCPY(ifr.ifr_name, nic_name, sizeof(ifr.ifr_name));
+
+    // duplex and speed
+    memset(&ethcmd, 0, sizeof ethcmd);
+    ethcmd.cmd = ETHTOOL_GSET;
+    ifr.ifr_data = (void *)&ethcmd;
+    ret = ioctl(sock, SIOCETHTOOL, &ifr);
+
+    if (ret != -1) {
+        duplex = ethcmd.duplex;
+        // speed is returned from ethtool as a __u32 ranging from 0 to INT_MAX
+        // or SPEED_UNKNOWN (-1)
+        uint_speed = psutil_ethtool_cmd_speed(&ethcmd);
+        if (uint_speed == (__u32)SPEED_UNKNOWN || uint_speed > INT_MAX) {
+            speed = 0;
+        }
+        else {
+            speed = (int)uint_speed;
+        }
+    }
+    else {
+        if ((errno == EOPNOTSUPP) || (errno == EINVAL)) {
+            // EOPNOTSUPP may occur in case of wi-fi cards.
+            // For EINVAL see:
+            // https://github.com/giampaolo/psutil/issues/797
+            //     #issuecomment-202999532
+            duplex = DUPLEX_UNKNOWN;
+            speed = 0;
+        }
+        else {
+            PyErr_SetFromOSErrnoWithSyscall("ioctl(SIOCETHTOOL)");
+            goto error;
+        }
+    }
+
+    py_retlist = Py_BuildValue("[ii]", duplex, speed);
+    if (!py_retlist)
+        goto error;
+    close(sock);
+    return py_retlist;
+
+error:
+    if (sock != -1)
+        close(sock);
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/net.h b/contrib/python/psutil/py3/psutil/arch/linux/net.h
new file mode 100644
index 0000000000..55095c06c9
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/net.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_net_if_duplex_speed(PyObject* self, PyObject* args);
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/proc.c b/contrib/python/psutil/py3/psutil/arch/linux/proc.c
new file mode 100644
index 0000000000..b58a3ce2a2
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/proc.c
@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+#include <sys/syscall.h>
+#include <sched.h>
+#include <unistd.h>
+
+#include "proc.h"
+#include "../../_psutil_common.h"
+
+
+#ifdef PSUTIL_HAVE_IOPRIO
+enum {
+    IOPRIO_WHO_PROCESS = 1,
+};
+
+static inline int
+ioprio_get(int which, int who) {
+    return syscall(__NR_ioprio_get, which, who);
+}
+
+static inline int
+ioprio_set(int which, int who, int ioprio) {
+    return syscall(__NR_ioprio_set, which, who, ioprio);
+}
+
+#define IOPRIO_CLASS_SHIFT 13
+#define IOPRIO_PRIO_MASK ((1UL << IOPRIO_CLASS_SHIFT) - 1)
+
+#define IOPRIO_PRIO_CLASS(mask) ((mask) >> IOPRIO_CLASS_SHIFT)
+#define IOPRIO_PRIO_DATA(mask) ((mask) & IOPRIO_PRIO_MASK)
+#define IOPRIO_PRIO_VALUE(class, data) (((class) << IOPRIO_CLASS_SHIFT) | data)
+
+
+// Return a (ioclass, iodata) Python tuple representing process I/O
+// priority.
+PyObject *
+psutil_proc_ioprio_get(PyObject *self, PyObject *args) {
+    pid_t pid;
+    int ioprio, ioclass, iodata;
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    ioprio = ioprio_get(IOPRIO_WHO_PROCESS, pid);
+    if (ioprio == -1)
+        return PyErr_SetFromErrno(PyExc_OSError);
+    ioclass = IOPRIO_PRIO_CLASS(ioprio);
+    iodata = IOPRIO_PRIO_DATA(ioprio);
+    return Py_BuildValue("ii", ioclass, iodata);
+}
+
+
+// A wrapper around ioprio_set(); sets process I/O priority. ioclass
+// can be either IOPRIO_CLASS_RT, IOPRIO_CLASS_BE, IOPRIO_CLASS_IDLE or
+// 0. iodata goes from 0 to 7 depending on ioclass specified.
+PyObject *
+psutil_proc_ioprio_set(PyObject *self, PyObject *args) {
+    pid_t pid;
+    int ioprio, ioclass, iodata;
+    int retval;
+
+    if (! PyArg_ParseTuple(
+            args, _Py_PARSE_PID "ii", &pid, &ioclass, &iodata)) {
+        return NULL;
+    }
+    ioprio = IOPRIO_PRIO_VALUE(ioclass, iodata);
+    retval = ioprio_set(IOPRIO_WHO_PROCESS, pid, ioprio);
+    if (retval == -1)
+        return PyErr_SetFromErrno(PyExc_OSError);
+    Py_RETURN_NONE;
+}
+#endif  // PSUTIL_HAVE_IOPRIO
+
+
+#ifdef PSUTIL_HAVE_CPU_AFFINITY
+
+// Return process CPU affinity as a Python list.
+PyObject *
+psutil_proc_cpu_affinity_get(PyObject *self, PyObject *args) {
+    int cpu, ncpus, count, cpucount_s;
+    pid_t pid;
+    size_t setsize;
+    cpu_set_t *mask = NULL;
+    PyObject *py_list = NULL;
+
+    if (!PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    // The minimum number of CPUs allocated in a cpu_set_t.
+    ncpus = sizeof(unsigned long) * CHAR_BIT;
+    while (1) {
+        setsize = CPU_ALLOC_SIZE(ncpus);
+        mask = CPU_ALLOC(ncpus);
+        if (mask == NULL) {
+            psutil_debug("CPU_ALLOC() failed");
+            return PyErr_NoMemory();
+        }
+        if (sched_getaffinity(pid, setsize, mask) == 0)
+            break;
+        CPU_FREE(mask);
+        if (errno != EINVAL)
+            return PyErr_SetFromErrno(PyExc_OSError);
+        if (ncpus > INT_MAX / 2) {
+            PyErr_SetString(PyExc_OverflowError, "could not allocate "
+                            "a large enough CPU set");
+            return NULL;
+        }
+        ncpus = ncpus * 2;
+    }
+
+    py_list = PyList_New(0);
+    if (py_list == NULL)
+        goto error;
+
+    cpucount_s = CPU_COUNT_S(setsize, mask);
+    for (cpu = 0, count = cpucount_s; count; cpu++) {
+        if (CPU_ISSET_S(cpu, setsize, mask)) {
+#if PY_MAJOR_VERSION >= 3
+            PyObject *cpu_num = PyLong_FromLong(cpu);
+#else
+            PyObject *cpu_num = PyInt_FromLong(cpu);
+#endif
+            if (cpu_num == NULL)
+                goto error;
+            if (PyList_Append(py_list, cpu_num)) {
+                Py_DECREF(cpu_num);
+                goto error;
+            }
+            Py_DECREF(cpu_num);
+            --count;
+        }
+    }
+    CPU_FREE(mask);
+    return py_list;
+
+error:
+    if (mask)
+        CPU_FREE(mask);
+    Py_XDECREF(py_list);
+    return NULL;
+}
+
+
+// Set process CPU affinity; expects a bitmask.
+PyObject *
+psutil_proc_cpu_affinity_set(PyObject *self, PyObject *args) {
+    cpu_set_t cpu_set;
+    size_t len;
+    pid_t pid;
+    Py_ssize_t i, seq_len;
+    PyObject *py_cpu_set;
+
+    if (!PyArg_ParseTuple(args, _Py_PARSE_PID "O", &pid, &py_cpu_set))
+        return NULL;
+
+    if (!PySequence_Check(py_cpu_set)) {
+        return PyErr_Format(
+            PyExc_TypeError,
+#if PY_MAJOR_VERSION >= 3
+            "sequence argument expected, got %R", Py_TYPE(py_cpu_set)
+#else
+            "sequence argument expected, got %s", Py_TYPE(py_cpu_set)->tp_name
+#endif
+        );
+    }
+
+    seq_len = PySequence_Size(py_cpu_set);
+    if (seq_len < 0) {
+        return NULL;
+    }
+    CPU_ZERO(&cpu_set);
+    for (i = 0; i < seq_len; i++) {
+        PyObject *item = PySequence_GetItem(py_cpu_set, i);
+        if (!item) {
+            return NULL;
+        }
+#if PY_MAJOR_VERSION >= 3
+        long value = PyLong_AsLong(item);
+#else
+        long value = PyInt_AsLong(item);
+#endif
+        Py_XDECREF(item);
+        if ((value == -1) || PyErr_Occurred()) {
+            if (!PyErr_Occurred())
+                PyErr_SetString(PyExc_ValueError, "invalid CPU value");
+            return NULL;
+        }
+        CPU_SET(value, &cpu_set);
+    }
+
+    len = sizeof(cpu_set);
+    if (sched_setaffinity(pid, len, &cpu_set)) {
+        return PyErr_SetFromErrno(PyExc_OSError);
+    }
+
+    Py_RETURN_NONE;
+}
+#endif  // PSUTIL_HAVE_CPU_AFFINITY
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/proc.h b/contrib/python/psutil/py3/psutil/arch/linux/proc.h
new file mode 100644
index 0000000000..94a84c62ec
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/proc.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+#include <sys/syscall.h>  // __NR_*
+#include <sched.h> // CPU_ALLOC
+
+// Linux >= 2.6.13
+#if defined(__NR_ioprio_get) && defined(__NR_ioprio_set)
+    #define PSUTIL_HAVE_IOPRIO
+
+    PyObject *psutil_proc_ioprio_get(PyObject *self, PyObject *args);
+    PyObject *psutil_proc_ioprio_set(PyObject *self, PyObject *args);
+#endif
+
+// Should exist starting from CentOS 6 (year 2011).
+#ifdef CPU_ALLOC
+    #define PSUTIL_HAVE_CPU_AFFINITY
+
+    PyObject *psutil_proc_cpu_affinity_get(PyObject *self, PyObject *args);
+    PyObject *psutil_proc_cpu_affinity_set(PyObject *self, PyObject *args);
+#endif
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/users.c b/contrib/python/psutil/py3/psutil/arch/linux/users.c
new file mode 100644
index 0000000000..546e29ee98
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/users.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+#include <utmp.h>
+#include <string.h>
+
+#include "../../_psutil_common.h"
+
+
+PyObject *
+psutil_users(PyObject *self, PyObject *args) {
+    struct utmp *ut;
+    PyObject *py_retlist = PyList_New(0);
+    PyObject *py_tuple = NULL;
+    PyObject *py_username = NULL;
+    PyObject *py_tty = NULL;
+    PyObject *py_hostname = NULL;
+
+    if (py_retlist == NULL)
+        return NULL;
+    setutent();
+    while (NULL != (ut = getutent())) {
+        if (ut->ut_type != USER_PROCESS)
+            continue;
+        py_tuple = NULL;
+        py_username = PyUnicode_DecodeFSDefault(ut->ut_user);
+        if (! py_username)
+            goto error;
+        py_tty = PyUnicode_DecodeFSDefault(ut->ut_line);
+        if (! py_tty)
+            goto error;
+        if (strcmp(ut->ut_host, ":0") || strcmp(ut->ut_host, ":0.0"))
+            py_hostname = PyUnicode_DecodeFSDefault("localhost");
+        else
+            py_hostname = PyUnicode_DecodeFSDefault(ut->ut_host);
+        if (! py_hostname)
+            goto error;
+
+        py_tuple = Py_BuildValue(
+            "OOOd" _Py_PARSE_PID,
+            py_username,              // username
+            py_tty,                   // tty
+            py_hostname,              // hostname
+            (double)ut->ut_tv.tv_sec,  // tstamp
+            ut->ut_pid                // process id
+        );
+        if (! py_tuple)
+            goto error;
+        if (PyList_Append(py_retlist, py_tuple))
+            goto error;
+        Py_CLEAR(py_username);
+        Py_CLEAR(py_tty);
+        Py_CLEAR(py_hostname);
+        Py_CLEAR(py_tuple);
+    }
+    endutent();
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_username);
+    Py_XDECREF(py_tty);
+    Py_XDECREF(py_hostname);
+    Py_XDECREF(py_tuple);
+    Py_DECREF(py_retlist);
+    endutent();
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/linux/users.h b/contrib/python/psutil/py3/psutil/arch/linux/users.h
new file mode 100644
index 0000000000..ba2735d1d2
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/linux/users.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_users(PyObject* self, PyObject* args);
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/cpu.c b/contrib/python/psutil/py3/psutil/arch/osx/cpu.c
new file mode 100644
index 0000000000..3759dda44e
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/cpu.c
@@ -0,0 +1,326 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+System-wide CPU related functions.
+
+Original code was refactored and moved from psutil/_psutil_osx.c in 2020
+right before a4c0a0eb0d2a872ab7a45e47fcf37ef1fde5b012.
+For reference, here's the git history with original implementations:
+
+- CPU count logical: 3d291d425b856077e65163e43244050fb188def1
+- CPU count physical: 4263e354bb4984334bc44adf5dd2f32013d69fba
+- CPU times: 32488bdf54aed0f8cef90d639c1667ffaa3c31c7
+- CPU stat: fa00dfb961ef63426c7818899340866ced8d2418
+- CPU frequency: 6ba1ac4ebfcd8c95fca324b15606ab0ec1412d39
+*/
+
+#include <Python.h>
+#include <mach/mach_error.h>
+#include <mach/mach_host.h>
+#include <mach/mach_port.h>
+#include <mach/mach_vm.h>
+#include <sys/sysctl.h>
+#include <sys/vmmeter.h>
+#include <mach/mach.h>
+#if defined(__arm64__) || defined(__aarch64__)
+#include <CoreFoundation/CoreFoundation.h>
+#include <IOKit/IOKitLib.h>
+#endif
+
+#if (defined __MAC_OS_X_VERSION_MIN_REQUIRED) && (__MAC_OS_X_VERSION_MIN_REQUIRED < 120000)
+#define kIOMainPortDefault kIOMasterPortDefault
+#endif
+
+#include "../../_psutil_common.h"
+#include "../../_psutil_posix.h"
+
+
+PyObject *
+psutil_cpu_count_logical(PyObject *self, PyObject *args) {
+    int num;
+    size_t size = sizeof(int);
+
+    if (sysctlbyname("hw.logicalcpu", &num, &size, NULL, 2))
+        Py_RETURN_NONE;  // mimic os.cpu_count()
+    else
+        return Py_BuildValue("i", num);
+}
+
+
+PyObject *
+psutil_cpu_count_cores(PyObject *self, PyObject *args) {
+    int num;
+    size_t size = sizeof(int);
+
+    if (sysctlbyname("hw.physicalcpu", &num, &size, NULL, 0))
+        Py_RETURN_NONE;  // mimic os.cpu_count()
+    else
+        return Py_BuildValue("i", num);
+}
+
+
+PyObject *
+psutil_cpu_times(PyObject *self, PyObject *args) {
+    mach_msg_type_number_t count = HOST_CPU_LOAD_INFO_COUNT;
+    kern_return_t error;
+    host_cpu_load_info_data_t r_load;
+
+    mach_port_t host_port = mach_host_self();
+    error = host_statistics(host_port, HOST_CPU_LOAD_INFO,
+                            (host_info_t)&r_load, &count);
+    if (error != KERN_SUCCESS) {
+        return PyErr_Format(
+            PyExc_RuntimeError,
+            "host_statistics(HOST_CPU_LOAD_INFO) syscall failed: %s",
+            mach_error_string(error));
+    }
+    mach_port_deallocate(mach_task_self(), host_port);
+
+    return Py_BuildValue(
+        "(dddd)",
+        (double)r_load.cpu_ticks[CPU_STATE_USER] / CLK_TCK,
+        (double)r_load.cpu_ticks[CPU_STATE_NICE] / CLK_TCK,
+        (double)r_load.cpu_ticks[CPU_STATE_SYSTEM] / CLK_TCK,
+        (double)r_load.cpu_ticks[CPU_STATE_IDLE] / CLK_TCK
+    );
+}
+
+
+PyObject *
+psutil_cpu_stats(PyObject *self, PyObject *args) {
+    struct vmmeter vmstat;
+    kern_return_t ret;
+    mach_msg_type_number_t count = sizeof(vmstat) / sizeof(integer_t);
+    mach_port_t mport = mach_host_self();
+
+    ret = host_statistics(mport, HOST_VM_INFO, (host_info_t)&vmstat, &count);
+    if (ret != KERN_SUCCESS) {
+        PyErr_Format(
+            PyExc_RuntimeError,
+            "host_statistics(HOST_VM_INFO) failed: %s",
+            mach_error_string(ret));
+        return NULL;
+    }
+    mach_port_deallocate(mach_task_self(), mport);
+
+    return Py_BuildValue(
+        "IIIII",
+        vmstat.v_swtch,  // ctx switches
+        vmstat.v_intr,  // interrupts
+        vmstat.v_soft,  // software interrupts
+        vmstat.v_syscall,  // syscalls
+        vmstat.v_trap  // traps
+    );
+}
+
+#if defined(__arm64__) || defined(__aarch64__)
+PyObject *
+psutil_cpu_freq(PyObject *self, PyObject *args) {
+    uint32_t min;
+    uint32_t curr;
+    uint32_t pMin;
+    uint32_t eMin;
+    uint32_t max;
+    kern_return_t status;
+    CFDictionaryRef matching = NULL;
+    CFTypeRef pCoreRef = NULL;
+    CFTypeRef eCoreRef = NULL;
+    io_iterator_t iter = 0;
+    io_registry_entry_t entry = 0;
+    io_name_t name;
+
+    matching = IOServiceMatching("AppleARMIODevice");
+    if (matching == 0) {
+        return PyErr_Format(
+            PyExc_RuntimeError,
+            "IOServiceMatching call failed, 'AppleARMIODevice' not found"
+        );
+    }
+
+    status = IOServiceGetMatchingServices(kIOMainPortDefault, matching, &iter);
+    if (status != KERN_SUCCESS) {
+        PyErr_Format(
+            PyExc_RuntimeError, "IOServiceGetMatchingServices call failed"
+        );
+        goto error;
+    }
+
+    while ((entry = IOIteratorNext(iter)) != 0) {
+        status = IORegistryEntryGetName(entry, name);
+        if (status != KERN_SUCCESS) {
+            IOObjectRelease(entry);
+            continue;
+        }
+        if (strcmp(name, "pmgr") == 0) {
+            break;
+        }
+        IOObjectRelease(entry);
+    }
+
+    if (entry == 0) {
+        PyErr_Format(
+            PyExc_RuntimeError,
+            "'pmgr' entry was not found in AppleARMIODevice service"
+        );
+        goto error;
+    }
+
+    pCoreRef = IORegistryEntryCreateCFProperty(
+        entry, CFSTR("voltage-states5-sram"), kCFAllocatorDefault, 0);
+    if (pCoreRef == NULL) {
+        PyErr_Format(
+            PyExc_RuntimeError, "'voltage-states5-sram' property not found");
+        goto error;
+    }
+
+    eCoreRef = IORegistryEntryCreateCFProperty(
+        entry, CFSTR("voltage-states1-sram"), kCFAllocatorDefault, 0);
+    if (eCoreRef == NULL) {
+        PyErr_Format(
+            PyExc_RuntimeError, "'voltage-states1-sram' property not found");
+        goto error;
+    }
+
+    size_t pCoreLength = CFDataGetLength(pCoreRef);
+    size_t eCoreLength = CFDataGetLength(eCoreRef);
+    if (pCoreLength < 8) {
+        PyErr_Format(
+            PyExc_RuntimeError,
+            "expected 'voltage-states5-sram' buffer to have at least size 8"
+        );
+        goto error;
+    }
+    if (eCoreLength < 4) {
+        PyErr_Format(
+            PyExc_RuntimeError,
+            "expected 'voltage-states1-sram' buffer to have at least size 4"
+        );
+        goto error;
+    }
+
+    CFDataGetBytes(pCoreRef, CFRangeMake(0, 4), (UInt8 *) &pMin);
+    CFDataGetBytes(eCoreRef, CFRangeMake(0, 4), (UInt8 *) &eMin);
+    CFDataGetBytes(pCoreRef, CFRangeMake(pCoreLength - 8, 4), (UInt8 *) &max);
+
+    min = pMin < eMin ? pMin : eMin;
+    curr = max;
+
+    CFRelease(pCoreRef);
+    CFRelease(eCoreRef);
+    IOObjectRelease(iter);
+    IOObjectRelease(entry);
+
+    return Py_BuildValue(
+        "IKK",
+        curr / 1000 / 1000,
+        min / 1000 / 1000,
+        max / 1000 / 1000
+    );
+
+error:
+    if (pCoreRef != NULL)
+        CFRelease(pCoreRef);
+    if (eCoreRef != NULL)
+        CFRelease(eCoreRef);
+    if (iter != 0)
+        IOObjectRelease(iter);
+    if (entry != 0)
+        IOObjectRelease(entry);
+    return NULL;
+}
+#else
+PyObject *
+psutil_cpu_freq(PyObject *self, PyObject *args) {
+    unsigned int curr;
+    int64_t min = 0;
+    int64_t max = 0;
+    int mib[2];
+    size_t len = sizeof(curr);
+    size_t size = sizeof(min);
+
+    // also available as "hw.cpufrequency" but it's deprecated
+    mib[0] = CTL_HW;
+    mib[1] = HW_CPU_FREQ;
+
+    if (sysctl(mib, 2, &curr, &len, NULL, 0) < 0)
+        return PyErr_SetFromOSErrnoWithSyscall("sysctl(HW_CPU_FREQ)");
+
+    if (sysctlbyname("hw.cpufrequency_min", &min, &size, NULL, 0))
+        psutil_debug("sysctl('hw.cpufrequency_min') failed (set to 0)");
+
+    if (sysctlbyname("hw.cpufrequency_max", &max, &size, NULL, 0))
+        psutil_debug("sysctl('hw.cpufrequency_min') failed (set to 0)");
+
+    return Py_BuildValue(
+        "IKK",
+        curr / 1000 / 1000,
+        min / 1000 / 1000,
+        max / 1000 / 1000);
+}
+#endif
+
+PyObject *
+psutil_per_cpu_times(PyObject *self, PyObject *args) {
+    natural_t cpu_count;
+    natural_t i;
+    processor_info_array_t info_array;
+    mach_msg_type_number_t info_count;
+    kern_return_t error;
+    processor_cpu_load_info_data_t *cpu_load_info = NULL;
+    int ret;
+    PyObject *py_retlist = PyList_New(0);
+    PyObject *py_cputime = NULL;
+
+    if (py_retlist == NULL)
+        return NULL;
+
+    mach_port_t host_port = mach_host_self();
+    error = host_processor_info(host_port, PROCESSOR_CPU_LOAD_INFO,
+                                &cpu_count, &info_array, &info_count);
+    if (error != KERN_SUCCESS) {
+        PyErr_Format(
+            PyExc_RuntimeError,
+            "host_processor_info(PROCESSOR_CPU_LOAD_INFO) syscall failed: %s",
+             mach_error_string(error));
+        goto error;
+    }
+    mach_port_deallocate(mach_task_self(), host_port);
+
+    cpu_load_info = (processor_cpu_load_info_data_t *) info_array;
+
+    for (i = 0; i < cpu_count; i++) {
+        py_cputime = Py_BuildValue(
+            "(dddd)",
+            (double)cpu_load_info[i].cpu_ticks[CPU_STATE_USER] / CLK_TCK,
+            (double)cpu_load_info[i].cpu_ticks[CPU_STATE_NICE] / CLK_TCK,
+            (double)cpu_load_info[i].cpu_ticks[CPU_STATE_SYSTEM] / CLK_TCK,
+            (double)cpu_load_info[i].cpu_ticks[CPU_STATE_IDLE] / CLK_TCK
+        );
+        if (!py_cputime)
+            goto error;
+        if (PyList_Append(py_retlist, py_cputime))
+            goto error;
+        Py_CLEAR(py_cputime);
+    }
+
+    ret = vm_deallocate(mach_task_self(), (vm_address_t)info_array,
+                        info_count * sizeof(int));
+    if (ret != KERN_SUCCESS)
+        PyErr_WarnEx(PyExc_RuntimeWarning, "vm_deallocate() failed", 2);
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_cputime);
+    Py_DECREF(py_retlist);
+    if (cpu_load_info != NULL) {
+        ret = vm_deallocate(mach_task_self(), (vm_address_t)info_array,
+                            info_count * sizeof(int));
+        if (ret != KERN_SUCCESS)
+            PyErr_WarnEx(PyExc_RuntimeWarning, "vm_deallocate() failed", 2);
+    }
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/cpu.h b/contrib/python/psutil/py3/psutil/arch/osx/cpu.h
new file mode 100644
index 0000000000..6cf92f82b3
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/cpu.h
@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_cpu_count_cores(PyObject *self, PyObject *args);
+PyObject *psutil_cpu_count_logical(PyObject *self, PyObject *args);
+PyObject *psutil_cpu_freq(PyObject *self, PyObject *args);
+PyObject *psutil_cpu_stats(PyObject *self, PyObject *args);
+PyObject *psutil_cpu_times(PyObject *self, PyObject *args);
+PyObject *psutil_per_cpu_times(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/disk.c b/contrib/python/psutil/py3/psutil/arch/osx/disk.c
new file mode 100644
index 0000000000..961fc42a48
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/disk.c
@@ -0,0 +1,377 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// Disk related functions. Original code was refactored and moved
+// from psutil/_psutil_osx.c in 2023. This is the GIT blame before the move:
+// https://github.com/giampaolo/psutil/blame/efd7ed3/psutil/_psutil_osx.c
+
+#include <Python.h>
+#include <sys/param.h>
+#include <sys/ucred.h>
+#include <sys/mount.h>
+#include <CoreFoundation/CoreFoundation.h>
+#include <IOKit/IOKitLib.h>
+#include <IOKit/storage/IOBlockStorageDriver.h>
+#include <IOKit/storage/IOMedia.h>
+#include <IOKit/IOBSD.h>
+
+#include "../../_psutil_common.h"
+
+
+/*
+ * Return a list of tuples including device, mount point and fs type
+ * for all partitions mounted on the system.
+ */
+PyObject *
+psutil_disk_partitions(PyObject *self, PyObject *args) {
+    int num;
+    int i;
+    int len;
+    uint64_t flags;
+    char opts[400];
+    struct statfs *fs = NULL;
+    PyObject *py_dev = NULL;
+    PyObject *py_mountp = NULL;
+    PyObject *py_tuple = NULL;
+    PyObject *py_retlist = PyList_New(0);
+
+    if (py_retlist == NULL)
+        return NULL;
+
+    // get the number of mount points
+    Py_BEGIN_ALLOW_THREADS
+    num = getfsstat(NULL, 0, MNT_NOWAIT);
+    Py_END_ALLOW_THREADS
+    if (num == -1) {
+        PyErr_SetFromErrno(PyExc_OSError);
+        goto error;
+    }
+
+    len = sizeof(*fs) * num;
+    fs = malloc(len);
+    if (fs == NULL) {
+        PyErr_NoMemory();
+        goto error;
+    }
+
+    Py_BEGIN_ALLOW_THREADS
+    num = getfsstat(fs, len, MNT_NOWAIT);
+    Py_END_ALLOW_THREADS
+    if (num == -1) {
+        PyErr_SetFromErrno(PyExc_OSError);
+        goto error;
+    }
+
+    for (i = 0; i < num; i++) {
+        opts[0] = 0;
+        flags = fs[i].f_flags;
+
+        // see sys/mount.h
+        if (flags & MNT_RDONLY)
+            strlcat(opts, "ro", sizeof(opts));
+        else
+            strlcat(opts, "rw", sizeof(opts));
+        if (flags & MNT_SYNCHRONOUS)
+            strlcat(opts, ",sync", sizeof(opts));
+        if (flags & MNT_NOEXEC)
+            strlcat(opts, ",noexec", sizeof(opts));
+        if (flags & MNT_NOSUID)
+            strlcat(opts, ",nosuid", sizeof(opts));
+        if (flags & MNT_UNION)
+            strlcat(opts, ",union", sizeof(opts));
+        if (flags & MNT_ASYNC)
+            strlcat(opts, ",async", sizeof(opts));
+        if (flags & MNT_EXPORTED)
+            strlcat(opts, ",exported", sizeof(opts));
+        if (flags & MNT_QUARANTINE)
+            strlcat(opts, ",quarantine", sizeof(opts));
+        if (flags & MNT_LOCAL)
+            strlcat(opts, ",local", sizeof(opts));
+        if (flags & MNT_QUOTA)
+            strlcat(opts, ",quota", sizeof(opts));
+        if (flags & MNT_ROOTFS)
+            strlcat(opts, ",rootfs", sizeof(opts));
+        if (flags & MNT_DOVOLFS)
+            strlcat(opts, ",dovolfs", sizeof(opts));
+        if (flags & MNT_DONTBROWSE)
+            strlcat(opts, ",dontbrowse", sizeof(opts));
+        if (flags & MNT_IGNORE_OWNERSHIP)
+            strlcat(opts, ",ignore-ownership", sizeof(opts));
+        if (flags & MNT_AUTOMOUNTED)
+            strlcat(opts, ",automounted", sizeof(opts));
+        if (flags & MNT_JOURNALED)
+            strlcat(opts, ",journaled", sizeof(opts));
+        if (flags & MNT_NOUSERXATTR)
+            strlcat(opts, ",nouserxattr", sizeof(opts));
+        if (flags & MNT_DEFWRITE)
+            strlcat(opts, ",defwrite", sizeof(opts));
+        if (flags & MNT_MULTILABEL)
+            strlcat(opts, ",multilabel", sizeof(opts));
+        if (flags & MNT_NOATIME)
+            strlcat(opts, ",noatime", sizeof(opts));
+        if (flags & MNT_UPDATE)
+            strlcat(opts, ",update", sizeof(opts));
+        if (flags & MNT_RELOAD)
+            strlcat(opts, ",reload", sizeof(opts));
+        if (flags & MNT_FORCE)
+            strlcat(opts, ",force", sizeof(opts));
+        if (flags & MNT_CMDFLAGS)
+            strlcat(opts, ",cmdflags", sizeof(opts));
+
+        py_dev = PyUnicode_DecodeFSDefault(fs[i].f_mntfromname);
+        if (! py_dev)
+            goto error;
+        py_mountp = PyUnicode_DecodeFSDefault(fs[i].f_mntonname);
+        if (! py_mountp)
+            goto error;
+        py_tuple = Py_BuildValue(
+            "(OOss)",
+            py_dev,               // device
+            py_mountp,            // mount point
+            fs[i].f_fstypename,   // fs type
+            opts);                // options
+        if (!py_tuple)
+            goto error;
+        if (PyList_Append(py_retlist, py_tuple))
+            goto error;
+        Py_CLEAR(py_dev);
+        Py_CLEAR(py_mountp);
+        Py_CLEAR(py_tuple);
+    }
+
+    free(fs);
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_dev);
+    Py_XDECREF(py_mountp);
+    Py_XDECREF(py_tuple);
+    Py_DECREF(py_retlist);
+    if (fs != NULL)
+        free(fs);
+    return NULL;
+}
+
+
+PyObject *
+psutil_disk_usage_used(PyObject *self, PyObject *args) {
+    PyObject *py_default_value;
+    PyObject *py_mount_point_bytes = NULL;
+    char* mount_point;
+
+#if PY_MAJOR_VERSION >= 3
+    if (!PyArg_ParseTuple(args, "O&O", PyUnicode_FSConverter, &py_mount_point_bytes, &py_default_value)) {
+        return NULL;
+    }
+    mount_point = PyBytes_AsString(py_mount_point_bytes);
+    if (NULL == mount_point) {
+        Py_XDECREF(py_mount_point_bytes);
+        return NULL;
+    }
+#else
+    if (!PyArg_ParseTuple(args, "sO", &mount_point, &py_default_value)) {
+        return NULL;
+    }
+#endif
+
+#ifdef ATTR_VOL_SPACEUSED
+    /* Call getattrlist(ATTR_VOL_SPACEUSED) to get used space info. */
+    int ret;
+    struct {
+        uint32_t size;
+        uint64_t spaceused;
+    } __attribute__((aligned(4), packed)) attrbuf = {0};
+    struct attrlist attrs = {0};
+
+    attrs.bitmapcount = ATTR_BIT_MAP_COUNT;
+    attrs.volattr = ATTR_VOL_INFO | ATTR_VOL_SPACEUSED;
+    Py_BEGIN_ALLOW_THREADS
+    ret = getattrlist(mount_point, &attrs, &attrbuf, sizeof(attrbuf), 0);
+    Py_END_ALLOW_THREADS
+    if (ret == 0) {
+        Py_XDECREF(py_mount_point_bytes);
+        return PyLong_FromUnsignedLongLong(attrbuf.spaceused);
+    }
+    psutil_debug("getattrlist(ATTR_VOL_SPACEUSED) failed, fall-back to default value");
+#endif
+    Py_XDECREF(py_mount_point_bytes);
+    Py_INCREF(py_default_value);
+    return py_default_value;
+}
+
+
+/*
+ * Return a Python dict of tuples for disk I/O information
+ */
+PyObject *
+psutil_disk_io_counters(PyObject *self, PyObject *args) {
+    CFDictionaryRef parent_dict;
+    CFDictionaryRef props_dict;
+    CFDictionaryRef stats_dict;
+    io_registry_entry_t parent;
+    io_registry_entry_t disk;
+    io_iterator_t disk_list;
+    PyObject *py_disk_info = NULL;
+    PyObject *py_retdict = PyDict_New();
+
+    if (py_retdict == NULL)
+        return NULL;
+
+    // Get list of disks
+    if (IOServiceGetMatchingServices(kIOMasterPortDefault,
+                                     IOServiceMatching(kIOMediaClass),
+                                     &disk_list) != kIOReturnSuccess) {
+        PyErr_SetString(
+            PyExc_RuntimeError, "unable to get the list of disks.");
+        goto error;
+    }
+
+    // Iterate over disks
+    while ((disk = IOIteratorNext(disk_list)) != 0) {
+        py_disk_info = NULL;
+        parent_dict = NULL;
+        props_dict = NULL;
+        stats_dict = NULL;
+
+        if (IORegistryEntryGetParentEntry(disk, kIOServicePlane, &parent)
+                != kIOReturnSuccess) {
+            PyErr_SetString(PyExc_RuntimeError,
+                            "unable to get the disk's parent.");
+            IOObjectRelease(disk);
+            goto error;
+        }
+
+        if (IOObjectConformsTo(parent, "IOBlockStorageDriver")) {
+            if (IORegistryEntryCreateCFProperties(
+                    disk,
+                    (CFMutableDictionaryRef *) &parent_dict,
+                    kCFAllocatorDefault,
+                    kNilOptions
+                ) != kIOReturnSuccess)
+            {
+                PyErr_SetString(PyExc_RuntimeError,
+                                "unable to get the parent's properties.");
+                IOObjectRelease(disk);
+                IOObjectRelease(parent);
+                goto error;
+            }
+
+            if (IORegistryEntryCreateCFProperties(
+                    parent,
+                    (CFMutableDictionaryRef *) &props_dict,
+                    kCFAllocatorDefault,
+                    kNilOptions
+                ) != kIOReturnSuccess)
+            {
+                PyErr_SetString(PyExc_RuntimeError,
+                                "unable to get the disk properties.");
+                CFRelease(props_dict);
+                IOObjectRelease(disk);
+                IOObjectRelease(parent);
+                goto error;
+            }
+
+            const int kMaxDiskNameSize = 64;
+            CFStringRef disk_name_ref = (CFStringRef)CFDictionaryGetValue(
+                parent_dict, CFSTR(kIOBSDNameKey));
+            char disk_name[kMaxDiskNameSize];
+
+            CFStringGetCString(disk_name_ref,
+                               disk_name,
+                               kMaxDiskNameSize,
+                               CFStringGetSystemEncoding());
+
+            stats_dict = (CFDictionaryRef)CFDictionaryGetValue(
+                props_dict, CFSTR(kIOBlockStorageDriverStatisticsKey));
+
+            if (stats_dict == NULL) {
+                PyErr_SetString(PyExc_RuntimeError,
+                                "Unable to get disk stats.");
+                goto error;
+            }
+
+            CFNumberRef number;
+            int64_t reads = 0;
+            int64_t writes = 0;
+            int64_t read_bytes = 0;
+            int64_t write_bytes = 0;
+            int64_t read_time = 0;
+            int64_t write_time = 0;
+
+            // Get disk reads/writes
+            if ((number = (CFNumberRef)CFDictionaryGetValue(
+                    stats_dict,
+                    CFSTR(kIOBlockStorageDriverStatisticsReadsKey))))
+            {
+                CFNumberGetValue(number, kCFNumberSInt64Type, &reads);
+            }
+            if ((number = (CFNumberRef)CFDictionaryGetValue(
+                    stats_dict,
+                    CFSTR(kIOBlockStorageDriverStatisticsWritesKey))))
+            {
+                CFNumberGetValue(number, kCFNumberSInt64Type, &writes);
+            }
+
+            // Get disk bytes read/written
+            if ((number = (CFNumberRef)CFDictionaryGetValue(
+                    stats_dict,
+                    CFSTR(kIOBlockStorageDriverStatisticsBytesReadKey))))
+            {
+                CFNumberGetValue(number, kCFNumberSInt64Type, &read_bytes);
+            }
+            if ((number = (CFNumberRef)CFDictionaryGetValue(
+                    stats_dict,
+                    CFSTR(kIOBlockStorageDriverStatisticsBytesWrittenKey))))
+            {
+                CFNumberGetValue(number, kCFNumberSInt64Type, &write_bytes);
+            }
+
+            // Get disk time spent reading/writing (nanoseconds)
+            if ((number = (CFNumberRef)CFDictionaryGetValue(
+                    stats_dict,
+                    CFSTR(kIOBlockStorageDriverStatisticsTotalReadTimeKey))))
+            {
+                CFNumberGetValue(number, kCFNumberSInt64Type, &read_time);
+            }
+            if ((number = (CFNumberRef)CFDictionaryGetValue(
+                    stats_dict,
+                    CFSTR(kIOBlockStorageDriverStatisticsTotalWriteTimeKey))))
+            {
+                CFNumberGetValue(number, kCFNumberSInt64Type, &write_time);
+            }
+
+            // Read/Write time on macOS comes back in nanoseconds and in psutil
+            // we've standardized on milliseconds so do the conversion.
+            py_disk_info = Py_BuildValue(
+                "(KKKKKK)",
+                reads,
+                writes,
+                read_bytes,
+                write_bytes,
+                read_time / 1000 / 1000,
+                write_time / 1000 / 1000);
+           if (!py_disk_info)
+                goto error;
+            if (PyDict_SetItemString(py_retdict, disk_name, py_disk_info))
+                goto error;
+            Py_CLEAR(py_disk_info);
+
+            CFRelease(parent_dict);
+            IOObjectRelease(parent);
+            CFRelease(props_dict);
+            IOObjectRelease(disk);
+        }
+    }
+
+    IOObjectRelease (disk_list);
+
+    return py_retdict;
+
+error:
+    Py_XDECREF(py_disk_info);
+    Py_DECREF(py_retdict);
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/disk.h b/contrib/python/psutil/py3/psutil/arch/osx/disk.h
new file mode 100644
index 0000000000..88ca9a28b1
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/disk.h
@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_disk_io_counters(PyObject *self, PyObject *args);
+PyObject *psutil_disk_partitions(PyObject *self, PyObject *args);
+PyObject *psutil_disk_usage_used(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/mem.c b/contrib/python/psutil/py3/psutil/arch/osx/mem.c
new file mode 100644
index 0000000000..53493065c2
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/mem.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// System memory related functions. Original code was refactored and moved
+// from psutil/_psutil_osx.c in 2023. This is the GIT blame before the move:
+// https://github.com/giampaolo/psutil/blame/efd7ed3/psutil/_psutil_osx.c
+
+#include <Python.h>
+#include <mach/host_info.h>
+#include <sys/sysctl.h>
+#include <mach/mach.h>
+
+#include "../../_psutil_posix.h"
+
+
+static int
+psutil_sys_vminfo(vm_statistics_data_t *vmstat) {
+    kern_return_t ret;
+    mach_msg_type_number_t count = sizeof(*vmstat) / sizeof(integer_t);
+    mach_port_t mport = mach_host_self();
+
+    ret = host_statistics(mport, HOST_VM_INFO, (host_info_t)vmstat, &count);
+    if (ret != KERN_SUCCESS) {
+        PyErr_Format(
+            PyExc_RuntimeError,
+            "host_statistics(HOST_VM_INFO) syscall failed: %s",
+            mach_error_string(ret));
+        return 0;
+    }
+    mach_port_deallocate(mach_task_self(), mport);
+    return 1;
+}
+
+
+/*
+ * Return system virtual memory stats.
+ * See:
+ * https://opensource.apple.com/source/system_cmds/system_cmds-790/
+ *     vm_stat.tproj/vm_stat.c.auto.html
+ */
+PyObject *
+psutil_virtual_mem(PyObject *self, PyObject *args) {
+    int      mib[2];
+    uint64_t total;
+    size_t   len = sizeof(total);
+    vm_statistics_data_t vm;
+    long pagesize = psutil_getpagesize();
+    // physical mem
+    mib[0] = CTL_HW;
+    mib[1] = HW_MEMSIZE;
+
+    // This is also available as sysctlbyname("hw.memsize").
+    if (sysctl(mib, 2, &total, &len, NULL, 0)) {
+        if (errno != 0)
+            PyErr_SetFromErrno(PyExc_OSError);
+        else
+            PyErr_Format(
+                PyExc_RuntimeError, "sysctl(HW_MEMSIZE) syscall failed");
+        return NULL;
+    }
+
+    // vm
+    if (!psutil_sys_vminfo(&vm))
+        return NULL;
+
+    return Py_BuildValue(
+        "KKKKKK",
+        total,
+        (unsigned long long) vm.active_count * pagesize,  // active
+        (unsigned long long) vm.inactive_count * pagesize,  // inactive
+        (unsigned long long) vm.wire_count * pagesize,  // wired
+        (unsigned long long) vm.free_count * pagesize,  // free
+        (unsigned long long) vm.speculative_count * pagesize  // speculative
+    );
+}
+
+
+/*
+ * Return stats about swap memory.
+ */
+PyObject *
+psutil_swap_mem(PyObject *self, PyObject *args) {
+    int mib[2];
+    size_t size;
+    struct xsw_usage totals;
+    vm_statistics_data_t vmstat;
+    long pagesize = psutil_getpagesize();
+
+    mib[0] = CTL_VM;
+    mib[1] = VM_SWAPUSAGE;
+    size = sizeof(totals);
+    if (sysctl(mib, 2, &totals, &size, NULL, 0) == -1) {
+        if (errno != 0)
+            PyErr_SetFromErrno(PyExc_OSError);
+        else
+            PyErr_Format(
+                PyExc_RuntimeError, "sysctl(VM_SWAPUSAGE) syscall failed");
+        return NULL;
+    }
+    if (!psutil_sys_vminfo(&vmstat))
+        return NULL;
+
+    return Py_BuildValue(
+        "LLLKK",
+        totals.xsu_total,
+        totals.xsu_used,
+        totals.xsu_avail,
+        (unsigned long long)vmstat.pageins * pagesize,
+        (unsigned long long)vmstat.pageouts * pagesize);
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/mem.h b/contrib/python/psutil/py3/psutil/arch/osx/mem.h
new file mode 100644
index 0000000000..dc4cd74388
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/mem.h
@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_swap_mem(PyObject *self, PyObject *args);
+PyObject *psutil_virtual_mem(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/net.c b/contrib/python/psutil/py3/psutil/arch/osx/net.c
new file mode 100644
index 0000000000..e9cc61e9b1
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/net.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// Networks related functions. Original code was refactored and moved
+// from psutil/_psutil_osx.c in 2023. This is the GIT blame before the move:
+// https://github.com/giampaolo/psutil/blame/efd7ed3/psutil/_psutil_osx.c
+
+#include <Python.h>
+#include <net/if_dl.h>
+#include <net/route.h>
+#include <sys/sysctl.h>
+#include <sys/socket.h>
+#include <net/if.h>
+
+#include "../../_psutil_common.h"
+
+
+PyObject *
+psutil_net_io_counters(PyObject *self, PyObject *args) {
+    char *buf = NULL, *lim, *next;
+    struct if_msghdr *ifm;
+    int mib[6];
+    mib[0] = CTL_NET;          // networking subsystem
+    mib[1] = PF_ROUTE;         // type of information
+    mib[2] = 0;                // protocol (IPPROTO_xxx)
+    mib[3] = 0;                // address family
+    mib[4] = NET_RT_IFLIST2;   // operation
+    mib[5] = 0;
+    size_t len;
+    PyObject *py_ifc_info = NULL;
+    PyObject *py_retdict = PyDict_New();
+
+    if (py_retdict == NULL)
+        return NULL;
+
+    if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
+        PyErr_SetFromErrno(PyExc_OSError);
+        goto error;
+    }
+
+    buf = malloc(len);
+    if (buf == NULL) {
+        PyErr_NoMemory();
+        goto error;
+    }
+
+    if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
+        PyErr_SetFromErrno(PyExc_OSError);
+        goto error;
+    }
+
+    lim = buf + len;
+
+    for (next = buf; next < lim; ) {
+        ifm = (struct if_msghdr *)next;
+        next += ifm->ifm_msglen;
+
+        if (ifm->ifm_type == RTM_IFINFO2) {
+            py_ifc_info = NULL;
+            struct if_msghdr2 *if2m = (struct if_msghdr2 *)ifm;
+            struct sockaddr_dl *sdl = (struct sockaddr_dl *)(if2m + 1);
+            char ifc_name[32];
+
+            strncpy(ifc_name, sdl->sdl_data, sdl->sdl_nlen);
+            ifc_name[sdl->sdl_nlen] = 0;
+
+            py_ifc_info = Py_BuildValue(
+                "(KKKKKKKi)",
+                if2m->ifm_data.ifi_obytes,
+                if2m->ifm_data.ifi_ibytes,
+                if2m->ifm_data.ifi_opackets,
+                if2m->ifm_data.ifi_ipackets,
+                if2m->ifm_data.ifi_ierrors,
+                if2m->ifm_data.ifi_oerrors,
+                if2m->ifm_data.ifi_iqdrops,
+                0);  // dropout not supported
+
+            if (!py_ifc_info)
+                goto error;
+            if (PyDict_SetItemString(py_retdict, ifc_name, py_ifc_info))
+                goto error;
+            Py_CLEAR(py_ifc_info);
+        }
+        else {
+            continue;
+        }
+    }
+
+    free(buf);
+    return py_retdict;
+
+error:
+    Py_XDECREF(py_ifc_info);
+    Py_DECREF(py_retdict);
+    if (buf != NULL)
+        free(buf);
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/net.h b/contrib/python/psutil/py3/psutil/arch/osx/net.h
new file mode 100644
index 0000000000..99079523c1
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/net.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_net_io_counters(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/proc.c b/contrib/python/psutil/py3/psutil/arch/osx/proc.c
new file mode 100644
index 0000000000..6f66c8613f
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/proc.c
@@ -0,0 +1,1267 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// Process related functions. Original code was moved in here from
+// psutil/_psutil_osx.c and psutil/arc/osx/process_info.c in 2023.
+// For reference, here's the GIT blame history before the move:
+// https://github.com/giampaolo/psutil/blame/59504a5/psutil/_psutil_osx.c
+// https://github.com/giampaolo/psutil/blame/efd7ed3/psutil/arch/osx/process_info.c
+
+#include <Python.h>
+#include <assert.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/sysctl.h>
+#include <libproc.h>
+#include <sys/proc_info.h>
+#include <sys/sysctl.h>
+#include <netinet/tcp_fsm.h>
+#include <arpa/inet.h>
+#include <pwd.h>
+#include <unistd.h>
+#include <mach/mach.h>
+#include <mach/mach_vm.h>
+#include <mach/shared_region.h>
+#include <mach-o/loader.h>
+
+#include "../../_psutil_common.h"
+#include "../../_psutil_posix.h"
+
+
+#define PSUTIL_TV2DOUBLE(t) ((t).tv_sec + (t).tv_usec / 1000000.0)
+typedef struct kinfo_proc kinfo_proc;
+
+
+// ====================================================================
+// --- utils
+// ====================================================================
+
+/*
+ * Returns a list of all BSD processes on the system.  This routine
+ * allocates the list and puts it in *procList and a count of the
+ * number of entries in *procCount.  You are responsible for freeing
+ * this list (use "free" from System framework).
+ * On success, the function returns 0.
+ * On error, the function returns a BSD errno value.
+ */
+static int
+psutil_get_proc_list(kinfo_proc **procList, size_t *procCount) {
+    int mib[3];
+    size_t size, size2;
+    void *ptr;
+    int err;
+    int lim = 8;  // some limit
+
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC;
+    mib[2] = KERN_PROC_ALL;
+    *procCount = 0;
+
+    /*
+     * We start by calling sysctl with ptr == NULL and size == 0.
+     * That will succeed, and set size to the appropriate length.
+     * We then allocate a buffer of at least that size and call
+     * sysctl with that buffer.  If that succeeds, we're done.
+     * If that call fails with ENOMEM, we throw the buffer away
+     * and try again.
+     * Note that the loop calls sysctl with NULL again.  This is
+     * is necessary because the ENOMEM failure case sets size to
+     * the amount of data returned, not the amount of data that
+     * could have been returned.
+     */
+    while (lim-- > 0) {
+        size = 0;
+        if (sysctl((int *)mib, 3, NULL, &size, NULL, 0) == -1) {
+            PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_PROC_ALL)");
+            return 1;
+        }
+        size2 = size + (size >> 3);  // add some
+        if (size2 > size) {
+            ptr = malloc(size2);
+            if (ptr == NULL)
+                ptr = malloc(size);
+            else
+                size = size2;
+        }
+        else {
+            ptr = malloc(size);
+        }
+        if (ptr == NULL) {
+            PyErr_NoMemory();
+            return 1;
+        }
+
+        if (sysctl((int *)mib, 3, ptr, &size, NULL, 0) == -1) {
+            err = errno;
+            free(ptr);
+            if (err != ENOMEM) {
+                PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_PROC_ALL)");
+                return 1;
+            }
+        }
+        else {
+            *procList = (kinfo_proc *)ptr;
+            *procCount = size / sizeof(kinfo_proc);
+            if (procCount <= 0) {
+                PyErr_Format(PyExc_RuntimeError, "no PIDs found");
+                return 1;
+            }
+            return 0;  // success
+        }
+    }
+
+    PyErr_Format(PyExc_RuntimeError, "couldn't collect PIDs list");
+    return 1;
+}
+
+
+// Read the maximum argument size for processes
+static int
+psutil_sysctl_argmax() {
+    int argmax;
+    int mib[2];
+    size_t size = sizeof(argmax);
+
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_ARGMAX;
+
+    if (sysctl(mib, 2, &argmax, &size, NULL, 0) == 0)
+        return argmax;
+    PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_ARGMAX)");
+    return 0;
+}
+
+
+// Read process argument space.
+static int
+psutil_sysctl_procargs(pid_t pid, char *procargs, size_t *argmax) {
+    int mib[3];
+
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROCARGS2;
+    mib[2] = pid;
+
+    if (sysctl(mib, 3, procargs, argmax, NULL, 0) < 0) {
+        if (psutil_pid_exists(pid) == 0) {
+            NoSuchProcess("psutil_pid_exists -> 0");
+            return 1;
+        }
+        // In case of zombie process we'll get EINVAL. We translate it
+        // to NSP and _psosx.py will translate it to ZP.
+        if (errno == EINVAL) {
+            psutil_debug("sysctl(KERN_PROCARGS2) -> EINVAL translated to NSP");
+            NoSuchProcess("sysctl(KERN_PROCARGS2) -> EINVAL");
+            return 1;
+        }
+        // There's nothing we can do other than raising AD.
+        if (errno == EIO) {
+            psutil_debug("sysctl(KERN_PROCARGS2) -> EIO translated to AD");
+            AccessDenied("sysctl(KERN_PROCARGS2) -> EIO");
+            return 1;
+        }
+        PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_PROCARGS2)");
+        return 1;
+    }
+    return 0;
+}
+
+
+static int
+psutil_get_kinfo_proc(pid_t pid, struct kinfo_proc *kp) {
+    int mib[4];
+    size_t len;
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC;
+    mib[2] = KERN_PROC_PID;
+    mib[3] = pid;
+
+    // fetch the info with sysctl()
+    len = sizeof(struct kinfo_proc);
+
+    // now read the data from sysctl
+    if (sysctl(mib, 4, kp, &len, NULL, 0) == -1) {
+        // raise an exception and throw errno as the error
+        PyErr_SetFromOSErrnoWithSyscall("sysctl");
+        return -1;
+    }
+
+    // sysctl succeeds but len is zero, happens when process has gone away
+    if (len == 0) {
+        NoSuchProcess("sysctl(kinfo_proc), len == 0");
+        return -1;
+    }
+    return 0;
+}
+
+
+/*
+ * A wrapper around proc_pidinfo().
+ * https://opensource.apple.com/source/xnu/xnu-2050.7.9/bsd/kern/proc_info.c
+ * Returns 0 on failure.
+ */
+static int
+psutil_proc_pidinfo(pid_t pid, int flavor, uint64_t arg, void *pti, int size) {
+    errno = 0;
+    int ret;
+
+    ret = proc_pidinfo(pid, flavor, arg, pti, size);
+    if (ret <= 0) {
+        psutil_raise_for_pid(pid, "proc_pidinfo()");
+        return 0;
+    }
+    if ((unsigned long)ret < sizeof(pti)) {
+        psutil_raise_for_pid(
+            pid, "proc_pidinfo() return size < sizeof(struct_pointer)");
+        return 0;
+    }
+    return ret;
+}
+
+
+/*
+ * A wrapper around task_for_pid() which sucks big time:
+ * - it's not documented
+ * - errno is set only sometimes
+ * - sometimes errno is ENOENT (?!?)
+ * - for PIDs != getpid() or PIDs which are not members of the procmod
+ *   it requires root
+ * As such we can only guess what the heck went wrong and fail either
+ * with NoSuchProcess or giveup with AccessDenied.
+ * Here's some history:
+ * https://github.com/giampaolo/psutil/issues/1181
+ * https://github.com/giampaolo/psutil/issues/1209
+ * https://github.com/giampaolo/psutil/issues/1291#issuecomment-396062519
+ */
+static int
+psutil_task_for_pid(pid_t pid, mach_port_t *task)
+{
+    // See: https://github.com/giampaolo/psutil/issues/1181
+    kern_return_t err = KERN_SUCCESS;
+
+    err = task_for_pid(mach_task_self(), pid, task);
+    if (err != KERN_SUCCESS) {
+        if (psutil_pid_exists(pid) == 0)
+            NoSuchProcess("task_for_pid");
+        // Now done in Python.
+        // else if (psutil_is_zombie(pid) == 1)
+        //     PyErr_SetString(ZombieProcessError,
+        //                     "task_for_pid -> psutil_is_zombie -> 1");
+        else {
+            psutil_debug(
+                "task_for_pid() failed (pid=%ld, err=%i, errno=%i, msg='%s'); "
+                "setting AccessDenied()",
+                (long)pid, err, errno, mach_error_string(err));
+            AccessDenied("task_for_pid");
+        }
+        return 1;
+    }
+    return 0;
+}
+
+
+/*
+ * A wrapper around proc_pidinfo(PROC_PIDLISTFDS), which dynamically sets
+ * the buffer size.
+ */
+static struct proc_fdinfo*
+psutil_proc_list_fds(pid_t pid, int *num_fds) {
+    int ret;
+    int fds_size = 0;
+    int max_size = 24 * 1024 * 1024;  // 24M
+    struct proc_fdinfo *fds_pointer = NULL;
+
+    errno = 0;
+    ret = proc_pidinfo(pid, PROC_PIDLISTFDS, 0, NULL, 0);
+    if (ret <= 0) {
+        psutil_raise_for_pid(pid, "proc_pidinfo(PROC_PIDLISTFDS) 1/2");
+        goto error;
+    }
+
+    while (1) {
+        if (ret > fds_size) {
+            while (ret > fds_size) {
+                fds_size += PROC_PIDLISTFD_SIZE * 32;
+                if (fds_size > max_size) {
+                    PyErr_Format(PyExc_RuntimeError,
+                                 "prevent malloc() to allocate > 24M");
+                    goto error;
+                }
+            }
+
+            if (fds_pointer != NULL) {
+                free(fds_pointer);
+            }
+            fds_pointer = malloc(fds_size);
+
+            if (fds_pointer == NULL) {
+                PyErr_NoMemory();
+                goto error;
+            }
+        }
+
+        errno = 0;
+        ret = proc_pidinfo(pid, PROC_PIDLISTFDS, 0, fds_pointer, fds_size);
+        if (ret <= 0) {
+            psutil_raise_for_pid(pid, "proc_pidinfo(PROC_PIDLISTFDS) 2/2");
+            goto error;
+        }
+
+        if (ret + (int)PROC_PIDLISTFD_SIZE >= fds_size) {
+            psutil_debug("PROC_PIDLISTFDS: make room for 1 extra fd");
+            ret = fds_size + (int)PROC_PIDLISTFD_SIZE;
+            continue;
+        }
+
+        break;
+    }
+
+    *num_fds = (ret / (int)PROC_PIDLISTFD_SIZE);
+    return fds_pointer;
+
+error:
+    if (fds_pointer != NULL)
+        free(fds_pointer);
+    return NULL;
+}
+
+
+// ====================================================================
+// --- Python APIs
+// ====================================================================
+
+
+/*
+ * Return a Python list of all the PIDs running on the system.
+ */
+PyObject *
+psutil_pids(PyObject *self, PyObject *args) {
+    kinfo_proc *proclist = NULL;
+    kinfo_proc *orig_address = NULL;
+    size_t num_processes;
+    size_t idx;
+    PyObject *py_pid = NULL;
+    PyObject *py_retlist = PyList_New(0);
+
+    if (py_retlist == NULL)
+        return NULL;
+
+    if (psutil_get_proc_list(&proclist, &num_processes) != 0)
+        goto error;
+
+    // save the address of proclist so we can free it later
+    orig_address = proclist;
+    for (idx = 0; idx < num_processes; idx++) {
+        py_pid = PyLong_FromPid(proclist->kp_proc.p_pid);
+        if (! py_pid)
+            goto error;
+        if (PyList_Append(py_retlist, py_pid))
+            goto error;
+        Py_CLEAR(py_pid);
+        proclist++;
+    }
+    free(orig_address);
+
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_pid);
+    Py_DECREF(py_retlist);
+    if (orig_address != NULL)
+        free(orig_address);
+    return NULL;
+}
+
+
+/*
+ * Return multiple process info as a Python tuple in one shot by
+ * using sysctl() and filling up a kinfo_proc struct.
+ * It should be possible to do this for all processes without
+ * incurring into permission (EPERM) errors.
+ * This will also succeed for zombie processes returning correct
+ * information.
+ */
+PyObject *
+psutil_proc_kinfo_oneshot(PyObject *self, PyObject *args) {
+    pid_t pid;
+    struct kinfo_proc kp;
+    PyObject *py_name;
+    PyObject *py_retlist;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    if (psutil_get_kinfo_proc(pid, &kp) == -1)
+        return NULL;
+
+    py_name = PyUnicode_DecodeFSDefault(kp.kp_proc.p_comm);
+    if (! py_name) {
+        // Likely a decoding error. We don't want to fail the whole
+        // operation. The python module may retry with proc_name().
+        PyErr_Clear();
+        py_name = Py_None;
+    }
+
+    py_retlist = Py_BuildValue(
+        _Py_PARSE_PID "llllllidiO",
+        kp.kp_eproc.e_ppid,                        // (pid_t) ppid
+        (long)kp.kp_eproc.e_pcred.p_ruid,          // (long) real uid
+        (long)kp.kp_eproc.e_ucred.cr_uid,          // (long) effective uid
+        (long)kp.kp_eproc.e_pcred.p_svuid,         // (long) saved uid
+        (long)kp.kp_eproc.e_pcred.p_rgid,          // (long) real gid
+        (long)kp.kp_eproc.e_ucred.cr_groups[0],    // (long) effective gid
+        (long)kp.kp_eproc.e_pcred.p_svgid,         // (long) saved gid
+        kp.kp_eproc.e_tdev,                        // (int) tty nr
+        PSUTIL_TV2DOUBLE(kp.kp_proc.p_starttime),  // (double) create time
+        (int)kp.kp_proc.p_stat,                    // (int) status
+        py_name                                    // (pystr) name
+    );
+
+    if (py_retlist != NULL) {
+        // XXX shall we decref() also in case of Py_BuildValue() error?
+        Py_DECREF(py_name);
+    }
+    return py_retlist;
+}
+
+
+/*
+ * Return multiple process info as a Python tuple in one shot by
+ * using proc_pidinfo(PROC_PIDTASKINFO) and filling a proc_taskinfo
+ * struct.
+ * Contrarily from proc_kinfo above this function will fail with
+ * EACCES for PIDs owned by another user and with ESRCH for zombie
+ * processes.
+ */
+PyObject *
+psutil_proc_pidtaskinfo_oneshot(PyObject *self, PyObject *args) {
+    pid_t pid;
+    struct proc_taskinfo pti;
+    uint64_t total_user;
+    uint64_t total_system;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    if (psutil_proc_pidinfo(pid, PROC_PIDTASKINFO, 0, &pti, sizeof(pti)) <= 0)
+        return NULL;
+
+    total_user = pti.pti_total_user * PSUTIL_MACH_TIMEBASE_INFO.numer;
+    total_user /= PSUTIL_MACH_TIMEBASE_INFO.denom;
+    total_system = pti.pti_total_system * PSUTIL_MACH_TIMEBASE_INFO.numer;
+    total_system /= PSUTIL_MACH_TIMEBASE_INFO.denom;
+
+    return Py_BuildValue(
+        "(ddKKkkkk)",
+        (float)total_user / 1000000000.0,     // (float) cpu user time
+        (float)total_system / 1000000000.0,   // (float) cpu sys time
+        // Note about memory: determining other mem stats on macOS is a mess:
+        // http://www.opensource.apple.com/source/top/top-67/libtop.c?txt
+        // I just give up.
+        // struct proc_regioninfo pri;
+        // psutil_proc_pidinfo(pid, PROC_PIDREGIONINFO, 0, &pri, sizeof(pri))
+        pti.pti_resident_size,  // (uns long long) rss
+        pti.pti_virtual_size,   // (uns long long) vms
+        pti.pti_faults,         // (uns long) number of page faults (pages)
+        pti.pti_pageins,        // (uns long) number of actual pageins (pages)
+        pti.pti_threadnum,      // (uns long) num threads
+        // Unvoluntary value seems not to be available;
+        // pti.pti_csw probably refers to the sum of the two;
+        // getrusage() numbers seems to confirm this theory.
+        pti.pti_csw             // (uns long) voluntary ctx switches
+    );
+}
+
+
+/*
+ * Return process name from kinfo_proc as a Python string.
+ */
+PyObject *
+psutil_proc_name(PyObject *self, PyObject *args) {
+    pid_t pid;
+    struct kinfo_proc kp;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    if (psutil_get_kinfo_proc(pid, &kp) == -1)
+        return NULL;
+    return PyUnicode_DecodeFSDefault(kp.kp_proc.p_comm);
+}
+
+
+/*
+ * Return process current working directory.
+ * Raises NSP in case of zombie process.
+ */
+PyObject *
+psutil_proc_cwd(PyObject *self, PyObject *args) {
+    pid_t pid;
+    struct proc_vnodepathinfo pathinfo;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    if (psutil_proc_pidinfo(
+            pid, PROC_PIDVNODEPATHINFO, 0, &pathinfo, sizeof(pathinfo)) <= 0)
+    {
+        return NULL;
+    }
+
+    return PyUnicode_DecodeFSDefault(pathinfo.pvi_cdir.vip_path);
+}
+
+
+/*
+ * Return path of the process executable.
+ */
+PyObject *
+psutil_proc_exe(PyObject *self, PyObject *args) {
+    pid_t pid;
+    char buf[PATH_MAX];
+    int ret;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    errno = 0;
+    ret = proc_pidpath(pid, &buf, sizeof(buf));
+    if (ret == 0) {
+        if (pid == 0) {
+            AccessDenied("automatically set for PID 0");
+            return NULL;
+        }
+        else if (errno == ENOENT) {
+            // It may happen (file not found error) if the process is
+            // still alive but the executable which launched it got
+            // deleted, see:
+            // https://github.com/giampaolo/psutil/issues/1738
+            return Py_BuildValue("s", "");
+        }
+        else {
+            psutil_raise_for_pid(pid, "proc_pidpath()");
+            return NULL;
+        }
+    }
+    return PyUnicode_DecodeFSDefault(buf);
+}
+
+
+/*
+ * Indicates if the given virtual address on the given architecture is in the
+ * shared VM region.
+ */
+static bool
+psutil_in_shared_region(mach_vm_address_t addr, cpu_type_t type) {
+    mach_vm_address_t base;
+    mach_vm_address_t size;
+
+    switch (type) {
+        case CPU_TYPE_ARM:
+            base = SHARED_REGION_BASE_ARM;
+            size = SHARED_REGION_SIZE_ARM;
+            break;
+        case CPU_TYPE_I386:
+            base = SHARED_REGION_BASE_I386;
+            size = SHARED_REGION_SIZE_I386;
+            break;
+        case CPU_TYPE_X86_64:
+            base = SHARED_REGION_BASE_X86_64;
+            size = SHARED_REGION_SIZE_X86_64;
+            break;
+        default:
+            return false;
+    }
+
+    return base <= addr && addr < (base + size);
+}
+
+
+/*
+ * Returns the USS (unique set size) of the process. Reference:
+ * https://dxr.mozilla.org/mozilla-central/source/xpcom/base/
+ *     nsMemoryReporterManager.cpp
+ */
+PyObject *
+psutil_proc_memory_uss(PyObject *self, PyObject *args) {
+    pid_t pid;
+    size_t len;
+    cpu_type_t cpu_type;
+    size_t private_pages = 0;
+    mach_vm_size_t size = 0;
+    mach_msg_type_number_t info_count = VM_REGION_TOP_INFO_COUNT;
+    kern_return_t kr;
+    long pagesize = psutil_getpagesize();
+    mach_vm_address_t addr = MACH_VM_MIN_ADDRESS;
+    mach_port_t task = MACH_PORT_NULL;
+    vm_region_top_info_data_t info;
+    mach_port_t object_name;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    if (psutil_task_for_pid(pid, &task) != 0)
+        return NULL;
+
+    len = sizeof(cpu_type);
+    if (sysctlbyname("sysctl.proc_cputype", &cpu_type, &len, NULL, 0) != 0) {
+        return PyErr_SetFromOSErrnoWithSyscall(
+            "sysctlbyname('sysctl.proc_cputype')");
+    }
+
+    // Roughly based on libtop_update_vm_regions in
+    // http://www.opensource.apple.com/source/top/top-100.1.2/libtop.c
+    for (addr = 0; ; addr += size) {
+        kr = mach_vm_region(
+            task, &addr, &size, VM_REGION_TOP_INFO, (vm_region_info_t)&info,
+            &info_count, &object_name);
+        if (kr == KERN_INVALID_ADDRESS) {
+            // Done iterating VM regions.
+            break;
+        }
+        else if (kr != KERN_SUCCESS) {
+            PyErr_Format(
+                PyExc_RuntimeError,
+                "mach_vm_region(VM_REGION_TOP_INFO) syscall failed");
+            return NULL;
+        }
+
+        if (psutil_in_shared_region(addr, cpu_type) &&
+                info.share_mode != SM_PRIVATE) {
+            continue;
+        }
+
+        switch (info.share_mode) {
+#ifdef SM_LARGE_PAGE
+            case SM_LARGE_PAGE:
+                // NB: Large pages are not shareable and always resident.
+#endif
+            case SM_PRIVATE:
+                private_pages += info.private_pages_resident;
+                private_pages += info.shared_pages_resident;
+                break;
+            case SM_COW:
+                private_pages += info.private_pages_resident;
+                if (info.ref_count == 1) {
+                    // Treat copy-on-write pages as private if they only
+                    // have one reference.
+                    private_pages += info.shared_pages_resident;
+                }
+                break;
+            case SM_SHARED:
+            default:
+                break;
+        }
+    }
+
+    mach_port_deallocate(mach_task_self(), task);
+    return Py_BuildValue("K", private_pages * pagesize);
+}
+
+
+/*
+ * Return process threads
+ */
+PyObject *
+psutil_proc_threads(PyObject *self, PyObject *args) {
+    pid_t pid;
+    int err, ret;
+    kern_return_t kr;
+    unsigned int info_count = TASK_BASIC_INFO_COUNT;
+    mach_port_t task = MACH_PORT_NULL;
+    struct task_basic_info tasks_info;
+    thread_act_port_array_t thread_list = NULL;
+    thread_info_data_t thinfo_basic;
+    thread_basic_info_t basic_info_th;
+    mach_msg_type_number_t thread_count, thread_info_count, j;
+
+    PyObject *py_tuple = NULL;
+    PyObject *py_retlist = PyList_New(0);
+
+    if (py_retlist == NULL)
+        return NULL;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        goto error;
+
+    if (psutil_task_for_pid(pid, &task) != 0)
+        goto error;
+
+    info_count = TASK_BASIC_INFO_COUNT;
+    err = task_info(task, TASK_BASIC_INFO, (task_info_t)&tasks_info,
+                    &info_count);
+    if (err != KERN_SUCCESS) {
+        // errcode 4 is "invalid argument" (access denied)
+        if (err == 4) {
+            AccessDenied("task_info(TASK_BASIC_INFO)");
+        }
+        else {
+            // otherwise throw a runtime error with appropriate error code
+            PyErr_Format(PyExc_RuntimeError,
+                         "task_info(TASK_BASIC_INFO) syscall failed");
+        }
+        goto error;
+    }
+
+    err = task_threads(task, &thread_list, &thread_count);
+    if (err != KERN_SUCCESS) {
+        PyErr_Format(PyExc_RuntimeError, "task_threads() syscall failed");
+        goto error;
+    }
+
+    for (j = 0; j < thread_count; j++) {
+        thread_info_count = THREAD_INFO_MAX;
+        kr = thread_info(thread_list[j], THREAD_BASIC_INFO,
+                         (thread_info_t)thinfo_basic, &thread_info_count);
+        if (kr != KERN_SUCCESS) {
+            PyErr_Format(PyExc_RuntimeError,
+                         "thread_info(THREAD_BASIC_INFO) syscall failed");
+            goto error;
+        }
+
+        basic_info_th = (thread_basic_info_t)thinfo_basic;
+        py_tuple = Py_BuildValue(
+            "Iff",
+            j + 1,
+            basic_info_th->user_time.seconds + \
+                (float)basic_info_th->user_time.microseconds / 1000000.0,
+            basic_info_th->system_time.seconds + \
+                (float)basic_info_th->system_time.microseconds / 1000000.0
+        );
+        if (!py_tuple)
+            goto error;
+        if (PyList_Append(py_retlist, py_tuple))
+            goto error;
+        Py_CLEAR(py_tuple);
+    }
+
+    ret = vm_deallocate(task, (vm_address_t)thread_list,
+                        thread_count * sizeof(int));
+    if (ret != KERN_SUCCESS)
+        PyErr_WarnEx(PyExc_RuntimeWarning, "vm_deallocate() failed", 2);
+
+    mach_port_deallocate(mach_task_self(), task);
+
+    return py_retlist;
+
+error:
+    if (task != MACH_PORT_NULL)
+        mach_port_deallocate(mach_task_self(), task);
+    Py_XDECREF(py_tuple);
+    Py_DECREF(py_retlist);
+    if (thread_list != NULL) {
+        ret = vm_deallocate(task, (vm_address_t)thread_list,
+                            thread_count * sizeof(int));
+        if (ret != KERN_SUCCESS)
+            PyErr_WarnEx(PyExc_RuntimeWarning, "vm_deallocate() failed", 2);
+    }
+    return NULL;
+}
+
+
+/*
+ * Return process open files as a Python tuple.
+ * References:
+ * - lsof source code: http://goo.gl/SYW79 and http://goo.gl/m78fd
+ * - /usr/include/sys/proc_info.h
+ */
+PyObject *
+psutil_proc_open_files(PyObject *self, PyObject *args) {
+    pid_t pid;
+    int num_fds;
+    int i;
+    unsigned long nb;
+    struct proc_fdinfo *fds_pointer = NULL;
+    struct proc_fdinfo *fdp_pointer;
+    struct vnode_fdinfowithpath vi;
+    PyObject *py_retlist = PyList_New(0);
+    PyObject *py_tuple = NULL;
+    PyObject *py_path = NULL;
+
+    if (py_retlist == NULL)
+        return NULL;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        goto error;
+
+    // see: https://github.com/giampaolo/psutil/issues/2116
+    if (pid == 0)
+        return py_retlist;
+
+    fds_pointer = psutil_proc_list_fds(pid, &num_fds);
+    if (fds_pointer == NULL)
+        goto error;
+
+    for (i = 0; i < num_fds; i++) {
+        fdp_pointer = &fds_pointer[i];
+
+        if (fdp_pointer->proc_fdtype == PROX_FDTYPE_VNODE) {
+            errno = 0;
+            nb = proc_pidfdinfo((pid_t)pid,
+                                fdp_pointer->proc_fd,
+                                PROC_PIDFDVNODEPATHINFO,
+                                &vi,
+                                sizeof(vi));
+
+            // --- errors checking
+            if ((nb <= 0) || nb < sizeof(vi)) {
+                if ((errno == ENOENT) || (errno == EBADF)) {
+                    // no such file or directory or bad file descriptor;
+                    // let's assume the file has been closed or removed
+                    continue;
+                }
+                else {
+                    psutil_raise_for_pid(
+                        pid, "proc_pidinfo(PROC_PIDFDVNODEPATHINFO)");
+                    goto error;
+                }
+            }
+            // --- /errors checking
+
+            // --- construct python list
+            py_path = PyUnicode_DecodeFSDefault(vi.pvip.vip_path);
+            if (! py_path)
+                goto error;
+            py_tuple = Py_BuildValue(
+                "(Oi)",
+                py_path,
+                (int)fdp_pointer->proc_fd);
+            if (!py_tuple)
+                goto error;
+            if (PyList_Append(py_retlist, py_tuple))
+                goto error;
+            Py_CLEAR(py_tuple);
+            Py_CLEAR(py_path);
+            // --- /construct python list
+        }
+    }
+
+    free(fds_pointer);
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_tuple);
+    Py_XDECREF(py_path);
+    Py_DECREF(py_retlist);
+    if (fds_pointer != NULL)
+        free(fds_pointer);
+    return NULL;  // exception has already been set earlier
+}
+
+
+/*
+ * Return process TCP and UDP connections as a list of tuples.
+ * Raises NSP in case of zombie process.
+ * References:
+ * - lsof source code: http://goo.gl/SYW79 and http://goo.gl/wNrC0
+ * - /usr/include/sys/proc_info.h
+ */
+PyObject *
+psutil_proc_connections(PyObject *self, PyObject *args) {
+    pid_t pid;
+    int num_fds;
+    int i;
+    unsigned long nb;
+    struct proc_fdinfo *fds_pointer = NULL;
+    struct proc_fdinfo *fdp_pointer;
+    struct socket_fdinfo si;
+    PyObject *py_retlist = PyList_New(0);
+    PyObject *py_tuple = NULL;
+    PyObject *py_laddr = NULL;
+    PyObject *py_raddr = NULL;
+    PyObject *py_af_filter = NULL;
+    PyObject *py_type_filter = NULL;
+
+    if (py_retlist == NULL)
+        return NULL;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "OO", &pid, &py_af_filter,
+                           &py_type_filter)) {
+        goto error;
+    }
+
+    // see: https://github.com/giampaolo/psutil/issues/2116
+    if (pid == 0)
+        return py_retlist;
+
+    if (!PySequence_Check(py_af_filter) || !PySequence_Check(py_type_filter)) {
+        PyErr_SetString(PyExc_TypeError, "arg 2 or 3 is not a sequence");
+        goto error;
+    }
+
+    fds_pointer = psutil_proc_list_fds(pid, &num_fds);
+    if (fds_pointer == NULL)
+        goto error;
+
+    for (i = 0; i < num_fds; i++) {
+        py_tuple = NULL;
+        py_laddr = NULL;
+        py_raddr = NULL;
+        fdp_pointer = &fds_pointer[i];
+
+        if (fdp_pointer->proc_fdtype == PROX_FDTYPE_SOCKET) {
+            errno = 0;
+            nb = proc_pidfdinfo(pid, fdp_pointer->proc_fd,
+                                PROC_PIDFDSOCKETINFO, &si, sizeof(si));
+
+            // --- errors checking
+            if ((nb <= 0) || (nb < sizeof(si)) || (errno != 0)) {
+                if (errno == EBADF) {
+                    // let's assume socket has been closed
+                    psutil_debug("proc_pidfdinfo(PROC_PIDFDSOCKETINFO) -> "
+                                 "EBADF (ignored)");
+                    continue;
+                }
+                else if (errno == EOPNOTSUPP) {
+                    // may happen sometimes, see:
+                    // https://github.com/giampaolo/psutil/issues/1512
+                    psutil_debug("proc_pidfdinfo(PROC_PIDFDSOCKETINFO) -> "
+                                 "EOPNOTSUPP (ignored)");
+                    continue;
+                }
+                else {
+                    psutil_raise_for_pid(
+                        pid, "proc_pidinfo(PROC_PIDFDSOCKETINFO)");
+                    goto error;
+                }
+            }
+            // --- /errors checking
+
+            //
+            int fd, family, type, lport, rport, state;
+            // TODO: use INET6_ADDRSTRLEN instead of 200
+            char lip[200], rip[200];
+            int inseq;
+            PyObject *py_family;
+            PyObject *py_type;
+
+            fd = (int)fdp_pointer->proc_fd;
+            family = si.psi.soi_family;
+            type = si.psi.soi_type;
+
+            // apply filters
+            py_family = PyLong_FromLong((long)family);
+            inseq = PySequence_Contains(py_af_filter, py_family);
+            Py_DECREF(py_family);
+            if (inseq == 0)
+                continue;
+            py_type = PyLong_FromLong((long)type);
+            inseq = PySequence_Contains(py_type_filter, py_type);
+            Py_DECREF(py_type);
+            if (inseq == 0)
+                continue;
+
+            if ((family == AF_INET) || (family == AF_INET6)) {
+                if (family == AF_INET) {
+                    inet_ntop(AF_INET,
+                              &si.psi.soi_proto.pri_tcp.tcpsi_ini. \
+                                  insi_laddr.ina_46.i46a_addr4,
+                              lip,
+                              sizeof(lip));
+                    inet_ntop(AF_INET,
+                              &si.psi.soi_proto.pri_tcp.tcpsi_ini.insi_faddr. \
+                                  ina_46.i46a_addr4,
+                              rip,
+                              sizeof(rip));
+                }
+                else {
+                    inet_ntop(AF_INET6,
+                              &si.psi.soi_proto.pri_tcp.tcpsi_ini. \
+                                  insi_laddr.ina_6,
+                              lip, sizeof(lip));
+                    inet_ntop(AF_INET6,
+                              &si.psi.soi_proto.pri_tcp.tcpsi_ini. \
+                                  insi_faddr.ina_6,
+                              rip, sizeof(rip));
+                }
+
+                // check for inet_ntop failures
+                if (errno != 0) {
+                    PyErr_SetFromOSErrnoWithSyscall("inet_ntop()");
+                    goto error;
+                }
+
+                lport = ntohs(si.psi.soi_proto.pri_tcp.tcpsi_ini.insi_lport);
+                rport = ntohs(si.psi.soi_proto.pri_tcp.tcpsi_ini.insi_fport);
+                if (type == SOCK_STREAM)
+                    state = (int)si.psi.soi_proto.pri_tcp.tcpsi_state;
+                else
+                    state = PSUTIL_CONN_NONE;
+
+                py_laddr = Py_BuildValue("(si)", lip, lport);
+                if (!py_laddr)
+                    goto error;
+                if (rport != 0)
+                    py_raddr = Py_BuildValue("(si)", rip, rport);
+                else
+                    py_raddr = Py_BuildValue("()");
+                if (!py_raddr)
+                    goto error;
+
+                // construct the python list
+                py_tuple = Py_BuildValue(
+                    "(iiiNNi)", fd, family, type, py_laddr, py_raddr, state);
+                if (!py_tuple)
+                    goto error;
+                if (PyList_Append(py_retlist, py_tuple))
+                    goto error;
+                Py_CLEAR(py_tuple);
+            }
+            else if (family == AF_UNIX) {
+                py_laddr = PyUnicode_DecodeFSDefault(
+                    si.psi.soi_proto.pri_un.unsi_addr.ua_sun.sun_path);
+                if (!py_laddr)
+                    goto error;
+                py_raddr = PyUnicode_DecodeFSDefault(
+                    si.psi.soi_proto.pri_un.unsi_caddr.ua_sun.sun_path);
+                if (!py_raddr)
+                    goto error;
+                // construct the python list
+                py_tuple = Py_BuildValue(
+                    "(iiiOOi)",
+                    fd, family, type,
+                    py_laddr,
+                    py_raddr,
+                    PSUTIL_CONN_NONE);
+                if (!py_tuple)
+                    goto error;
+                if (PyList_Append(py_retlist, py_tuple))
+                    goto error;
+                Py_CLEAR(py_tuple);
+                Py_CLEAR(py_laddr);
+                Py_CLEAR(py_raddr);
+            }
+        }
+    }
+
+    free(fds_pointer);
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_tuple);
+    Py_XDECREF(py_laddr);
+    Py_XDECREF(py_raddr);
+    Py_DECREF(py_retlist);
+    if (fds_pointer != NULL)
+        free(fds_pointer);
+    return NULL;
+}
+
+
+/*
+ * Return number of file descriptors opened by process.
+ * Raises NSP in case of zombie process.
+ */
+PyObject *
+psutil_proc_num_fds(PyObject *self, PyObject *args) {
+    pid_t pid;
+    int num_fds;
+    struct proc_fdinfo *fds_pointer;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    fds_pointer = psutil_proc_list_fds(pid, &num_fds);
+    if (fds_pointer == NULL)
+        return NULL;
+
+    free(fds_pointer);
+    return Py_BuildValue("i", num_fds);
+}
+
+
+// return process args as a python list
+PyObject *
+psutil_proc_cmdline(PyObject *self, PyObject *args) {
+    pid_t pid;
+    int nargs;
+    size_t len;
+    char *procargs = NULL;
+    char *arg_ptr;
+    char *arg_end;
+    char *curr_arg;
+    size_t argmax;
+    PyObject *py_retlist = PyList_New(0);
+    PyObject *py_arg = NULL;
+
+    if (py_retlist == NULL)
+        return NULL;
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        goto error;
+
+    // special case for PID 0 (kernel_task) where cmdline cannot be fetched
+    if (pid == 0)
+        return py_retlist;
+
+    // read argmax and allocate memory for argument space.
+    argmax = psutil_sysctl_argmax();
+    if (! argmax)
+        goto error;
+
+    procargs = (char *)malloc(argmax);
+    if (NULL == procargs) {
+        PyErr_NoMemory();
+        goto error;
+    }
+
+    if (psutil_sysctl_procargs(pid, procargs, &argmax) != 0)
+        goto error;
+
+    arg_end = &procargs[argmax];
+    // copy the number of arguments to nargs
+    memcpy(&nargs, procargs, sizeof(nargs));
+
+    arg_ptr = procargs + sizeof(nargs);
+    len = strlen(arg_ptr);
+    arg_ptr += len + 1;
+
+    if (arg_ptr == arg_end) {
+        free(procargs);
+        return py_retlist;
+    }
+
+    // skip ahead to the first argument
+    for (; arg_ptr < arg_end; arg_ptr++) {
+        if (*arg_ptr != '\0')
+            break;
+    }
+
+    // iterate through arguments
+    curr_arg = arg_ptr;
+    while (arg_ptr < arg_end && nargs > 0) {
+        if (*arg_ptr++ == '\0') {
+            py_arg = PyUnicode_DecodeFSDefault(curr_arg);
+            if (! py_arg)
+                goto error;
+            if (PyList_Append(py_retlist, py_arg))
+                goto error;
+            Py_DECREF(py_arg);
+            // iterate to next arg and decrement # of args
+            curr_arg = arg_ptr;
+            nargs--;
+        }
+    }
+
+    free(procargs);
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_arg);
+    Py_XDECREF(py_retlist);
+    if (procargs != NULL)
+        free(procargs);
+    return NULL;
+}
+
+
+// Return process environment as a python string.
+// On Big Sur this function returns an empty string unless:
+// * kernel is DEVELOPMENT || DEBUG
+// * target process is same as current_proc()
+// * target process is not cs_restricted
+// * SIP is off
+// * caller has an entitlement
+// See: https://github.com/apple/darwin-xnu/blob/2ff845c2e033bd0ff64b5b6aa6063a1f8f65aa32/bsd/kern/kern_sysctl.c#L1315-L1321
+PyObject *
+psutil_proc_environ(PyObject *self, PyObject *args) {
+    pid_t pid;
+    int nargs;
+    char *procargs = NULL;
+    char *procenv = NULL;
+    char *arg_ptr;
+    char *arg_end;
+    char *env_start;
+    size_t argmax;
+    PyObject *py_ret = NULL;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    // special case for PID 0 (kernel_task) where cmdline cannot be fetched
+    if (pid == 0)
+        goto empty;
+
+    // read argmax and allocate memory for argument space.
+    argmax = psutil_sysctl_argmax();
+    if (! argmax)
+        goto error;
+
+    procargs = (char *)malloc(argmax);
+    if (NULL == procargs) {
+        PyErr_NoMemory();
+        goto error;
+    }
+
+    if (psutil_sysctl_procargs(pid, procargs, &argmax) != 0)
+        goto error;
+
+    arg_end = &procargs[argmax];
+    // copy the number of arguments to nargs
+    memcpy(&nargs, procargs, sizeof(nargs));
+
+    // skip executable path
+    arg_ptr = procargs + sizeof(nargs);
+    arg_ptr = memchr(arg_ptr, '\0', arg_end - arg_ptr);
+
+    if (arg_ptr == NULL || arg_ptr == arg_end) {
+        psutil_debug(
+            "(arg_ptr == NULL || arg_ptr == arg_end); set environ to empty");
+        goto empty;
+    }
+
+    // skip ahead to the first argument
+    for (; arg_ptr < arg_end; arg_ptr++) {
+        if (*arg_ptr != '\0')
+            break;
+    }
+
+    // iterate through arguments
+    while (arg_ptr < arg_end && nargs > 0) {
+        if (*arg_ptr++ == '\0')
+            nargs--;
+    }
+
+    // build an environment variable block
+    env_start = arg_ptr;
+
+    procenv = calloc(1, arg_end - arg_ptr);
+    if (procenv == NULL) {
+        PyErr_NoMemory();
+        goto error;
+    }
+
+    while (*arg_ptr != '\0' && arg_ptr < arg_end) {
+        char *s = memchr(arg_ptr + 1, '\0', arg_end - arg_ptr);
+        if (s == NULL)
+            break;
+        memcpy(procenv + (arg_ptr - env_start), arg_ptr, s - arg_ptr);
+        arg_ptr = s + 1;
+    }
+
+    py_ret = PyUnicode_DecodeFSDefaultAndSize(
+        procenv, arg_ptr - env_start + 1);
+    if (!py_ret) {
+        // XXX: don't want to free() this as per:
+        // https://github.com/giampaolo/psutil/issues/926
+        // It sucks but not sure what else to do.
+        procargs = NULL;
+        goto error;
+    }
+
+    free(procargs);
+    free(procenv);
+    return py_ret;
+
+empty:
+    if (procargs != NULL)
+        free(procargs);
+    return Py_BuildValue("s", "");
+
+error:
+    Py_XDECREF(py_ret);
+    if (procargs != NULL)
+        free(procargs);
+    if (procenv != NULL)
+        free(procargs);
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/proc.h b/contrib/python/psutil/py3/psutil/arch/osx/proc.h
new file mode 100644
index 0000000000..63f16ccdd2
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/proc.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_pids(PyObject *self, PyObject *args);
+PyObject *psutil_proc_cmdline(PyObject *self, PyObject *args);
+PyObject *psutil_proc_connections(PyObject *self, PyObject *args);
+PyObject *psutil_proc_cwd(PyObject *self, PyObject *args);
+PyObject *psutil_proc_environ(PyObject *self, PyObject *args);
+PyObject *psutil_proc_exe(PyObject *self, PyObject *args);
+PyObject *psutil_proc_kinfo_oneshot(PyObject *self, PyObject *args);
+PyObject *psutil_proc_memory_uss(PyObject *self, PyObject *args);
+PyObject *psutil_proc_name(PyObject *self, PyObject *args);
+PyObject *psutil_proc_num_fds(PyObject *self, PyObject *args);
+PyObject *psutil_proc_open_files(PyObject *self, PyObject *args);
+PyObject *psutil_proc_pidtaskinfo_oneshot(PyObject *self, PyObject *args);
+PyObject *psutil_proc_threads(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/process_info.c b/contrib/python/psutil/py3/psutil/arch/osx/process_info.c
deleted file mode 100644
index fb9f24ffac..0000000000
--- a/contrib/python/psutil/py3/psutil/arch/osx/process_info.c
+++ /dev/null
@@ -1,384 +0,0 @@
-/*
- * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
- * Helper functions related to fetching process information.
- * Used by _psutil_osx module methods.
- */
-
-
-#include <Python.h>
-#include <errno.h>
-#include <sys/sysctl.h>
-#include <libproc.h>
-
-#include "../../_psutil_common.h"
-#include "../../_psutil_posix.h"
-#include "process_info.h"
-
-
-/*
- * Returns a list of all BSD processes on the system.  This routine
- * allocates the list and puts it in *procList and a count of the
- * number of entries in *procCount.  You are responsible for freeing
- * this list (use "free" from System framework).
- * On success, the function returns 0.
- * On error, the function returns a BSD errno value.
- */
-int
-psutil_get_proc_list(kinfo_proc **procList, size_t *procCount) {
-    int mib[3];
-    size_t size, size2;
-    void *ptr;
-    int err;
-    int lim = 8;  // some limit
-
-    mib[0] = CTL_KERN;
-    mib[1] = KERN_PROC;
-    mib[2] = KERN_PROC_ALL;
-    *procCount = 0;
-
-    /*
-     * We start by calling sysctl with ptr == NULL and size == 0.
-     * That will succeed, and set size to the appropriate length.
-     * We then allocate a buffer of at least that size and call
-     * sysctl with that buffer.  If that succeeds, we're done.
-     * If that call fails with ENOMEM, we throw the buffer away
-     * and try again.
-     * Note that the loop calls sysctl with NULL again.  This is
-     * is necessary because the ENOMEM failure case sets size to
-     * the amount of data returned, not the amount of data that
-     * could have been returned.
-     */
-    while (lim-- > 0) {
-        size = 0;
-        if (sysctl((int *)mib, 3, NULL, &size, NULL, 0) == -1) {
-            PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_PROC_ALL)");
-            return 1;
-        }
-        size2 = size + (size >> 3);  // add some
-        if (size2 > size) {
-            ptr = malloc(size2);
-            if (ptr == NULL)
-                ptr = malloc(size);
-            else
-                size = size2;
-        }
-        else {
-            ptr = malloc(size);
-        }
-        if (ptr == NULL) {
-            PyErr_NoMemory();
-            return 1;
-        }
-
-        if (sysctl((int *)mib, 3, ptr, &size, NULL, 0) == -1) {
-            err = errno;
-            free(ptr);
-            if (err != ENOMEM) {
-                PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_PROC_ALL)");
-                return 1;
-            }
-        }
-        else {
-            *procList = (kinfo_proc *)ptr;
-            *procCount = size / sizeof(kinfo_proc);
-            if (procCount <= 0) {
-                PyErr_Format(PyExc_RuntimeError, "no PIDs found");
-                return 1;
-            }
-            return 0;  // success
-        }
-    }
-
-    PyErr_Format(PyExc_RuntimeError, "couldn't collect PIDs list");
-    return 1;
-}
-
-
-// Read the maximum argument size for processes
-static int
-psutil_sysctl_argmax() {
-    int argmax;
-    int mib[2];
-    size_t size = sizeof(argmax);
-
-    mib[0] = CTL_KERN;
-    mib[1] = KERN_ARGMAX;
-
-    if (sysctl(mib, 2, &argmax, &size, NULL, 0) == 0)
-        return argmax;
-    PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_ARGMAX)");
-    return 0;
-}
-
-
-// Read process argument space.
-static int
-psutil_sysctl_procargs(pid_t pid, char *procargs, size_t argmax) {
-    int mib[3];
-
-    mib[0] = CTL_KERN;
-    mib[1] = KERN_PROCARGS2;
-    mib[2] = pid;
-
-    if (sysctl(mib, 3, procargs, &argmax, NULL, 0) < 0) {
-        if (psutil_pid_exists(pid) == 0) {
-            NoSuchProcess("psutil_pid_exists -> 0");
-            return 1;
-        }
-        // In case of zombie process we'll get EINVAL. We translate it
-        // to NSP and _psosx.py will translate it to ZP.
-        if (errno == EINVAL) {
-            psutil_debug("sysctl(KERN_PROCARGS2) -> EINVAL translated to NSP");
-            NoSuchProcess("sysctl(KERN_PROCARGS2) -> EINVAL");
-            return 1;
-        }
-        // There's nothing we can do other than raising AD.
-        if (errno == EIO) {
-            psutil_debug("sysctl(KERN_PROCARGS2) -> EIO translated to AD");
-            AccessDenied("sysctl(KERN_PROCARGS2) -> EIO");
-            return 1;
-        }
-        PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_PROCARGS2)");
-        return 1;
-    }
-    return 0;
-}
-
-
-// Return 1 if pid refers to a zombie process else 0.
-int
-psutil_is_zombie(pid_t pid) {
-    struct kinfo_proc kp;
-
-    if (psutil_get_kinfo_proc(pid, &kp) == -1)
-        return 0;
-    return (kp.kp_proc.p_stat == SZOMB) ? 1 : 0;
-}
-
-
-// return process args as a python list
-PyObject *
-psutil_get_cmdline(pid_t pid) {
-    int nargs;
-    size_t len;
-    char *procargs = NULL;
-    char *arg_ptr;
-    char *arg_end;
-    char *curr_arg;
-    size_t argmax;
-
-    PyObject *py_arg = NULL;
-    PyObject *py_retlist = NULL;
-
-    // special case for PID 0 (kernel_task) where cmdline cannot be fetched
-    if (pid == 0)
-        return Py_BuildValue("[]");
-
-    // read argmax and allocate memory for argument space.
-    argmax = psutil_sysctl_argmax();
-    if (! argmax)
-        goto error;
-
-    procargs = (char *)malloc(argmax);
-    if (NULL == procargs) {
-        PyErr_NoMemory();
-        goto error;
-    }
-
-    if (psutil_sysctl_procargs(pid, procargs, argmax) != 0)
-        goto error;
-
-    arg_end = &procargs[argmax];
-    // copy the number of arguments to nargs
-    memcpy(&nargs, procargs, sizeof(nargs));
-
-    arg_ptr = procargs + sizeof(nargs);
-    len = strlen(arg_ptr);
-    arg_ptr += len + 1;
-
-    if (arg_ptr == arg_end) {
-        free(procargs);
-        return Py_BuildValue("[]");
-    }
-
-    // skip ahead to the first argument
-    for (; arg_ptr < arg_end; arg_ptr++) {
-        if (*arg_ptr != '\0')
-            break;
-    }
-
-    // iterate through arguments
-    curr_arg = arg_ptr;
-    py_retlist = Py_BuildValue("[]");
-    if (!py_retlist)
-        goto error;
-    while (arg_ptr < arg_end && nargs > 0) {
-        if (*arg_ptr++ == '\0') {
-            py_arg = PyUnicode_DecodeFSDefault(curr_arg);
-            if (! py_arg)
-                goto error;
-            if (PyList_Append(py_retlist, py_arg))
-                goto error;
-            Py_DECREF(py_arg);
-            // iterate to next arg and decrement # of args
-            curr_arg = arg_ptr;
-            nargs--;
-        }
-    }
-
-    free(procargs);
-    return py_retlist;
-
-error:
-    Py_XDECREF(py_arg);
-    Py_XDECREF(py_retlist);
-    if (procargs != NULL)
-        free(procargs);
-    return NULL;
-}
-
-
-// return process environment as a python string
-PyObject *
-psutil_get_environ(pid_t pid) {
-    int nargs;
-    char *procargs = NULL;
-    char *procenv = NULL;
-    char *arg_ptr;
-    char *arg_end;
-    char *env_start;
-    size_t argmax;
-    PyObject *py_ret = NULL;
-
-    // special case for PID 0 (kernel_task) where cmdline cannot be fetched
-    if (pid == 0)
-        goto empty;
-
-    // read argmax and allocate memory for argument space.
-    argmax = psutil_sysctl_argmax();
-    if (! argmax)
-        goto error;
-
-    procargs = (char *)malloc(argmax);
-    if (NULL == procargs) {
-        PyErr_NoMemory();
-        goto error;
-    }
-
-    if (psutil_sysctl_procargs(pid, procargs, argmax) != 0)
-        goto error;
-
-    arg_end = &procargs[argmax];
-    // copy the number of arguments to nargs
-    memcpy(&nargs, procargs, sizeof(nargs));
-
-    // skip executable path
-    arg_ptr = procargs + sizeof(nargs);
-    arg_ptr = memchr(arg_ptr, '\0', arg_end - arg_ptr);
-
-    if (arg_ptr == NULL || arg_ptr == arg_end)
-        goto empty;
-
-    // skip ahead to the first argument
-    for (; arg_ptr < arg_end; arg_ptr++) {
-        if (*arg_ptr != '\0')
-            break;
-    }
-
-    // iterate through arguments
-    while (arg_ptr < arg_end && nargs > 0) {
-        if (*arg_ptr++ == '\0')
-            nargs--;
-    }
-
-    // build an environment variable block
-    env_start = arg_ptr;
-
-    procenv = calloc(1, arg_end - arg_ptr);
-    if (procenv == NULL) {
-        PyErr_NoMemory();
-        goto error;
-    }
-
-    while (*arg_ptr != '\0' && arg_ptr < arg_end) {
-        char *s = memchr(arg_ptr + 1, '\0', arg_end - arg_ptr);
-        if (s == NULL)
-            break;
-        memcpy(procenv + (arg_ptr - env_start), arg_ptr, s - arg_ptr);
-        arg_ptr = s + 1;
-    }
-
-    py_ret = PyUnicode_DecodeFSDefaultAndSize(
-        procenv, arg_ptr - env_start + 1);
-    if (!py_ret) {
-        // XXX: don't want to free() this as per:
-        // https://github.com/giampaolo/psutil/issues/926
-        // It sucks but not sure what else to do.
-        procargs = NULL;
-        goto error;
-    }
-
-    free(procargs);
-    free(procenv);
-    return py_ret;
-
-empty:
-    if (procargs != NULL)
-        free(procargs);
-    return Py_BuildValue("s", "");
-
-error:
-    Py_XDECREF(py_ret);
-    if (procargs != NULL)
-        free(procargs);
-    if (procenv != NULL)
-        free(procargs);
-    return NULL;
-}
-
-
-int
-psutil_get_kinfo_proc(pid_t pid, struct kinfo_proc *kp) {
-    int mib[4];
-    size_t len;
-    mib[0] = CTL_KERN;
-    mib[1] = KERN_PROC;
-    mib[2] = KERN_PROC_PID;
-    mib[3] = pid;
-
-    // fetch the info with sysctl()
-    len = sizeof(struct kinfo_proc);
-
-    // now read the data from sysctl
-    if (sysctl(mib, 4, kp, &len, NULL, 0) == -1) {
-        // raise an exception and throw errno as the error
-        PyErr_SetFromOSErrnoWithSyscall("sysctl");
-        return -1;
-    }
-
-    // sysctl succeeds but len is zero, happens when process has gone away
-    if (len == 0) {
-        NoSuchProcess("sysctl (len == 0)");
-        return -1;
-    }
-    return 0;
-}
-
-
-/*
- * A wrapper around proc_pidinfo().
- * Returns 0 on failure (and Python exception gets already set).
- */
-int
-psutil_proc_pidinfo(pid_t pid, int flavor, uint64_t arg, void *pti, int size) {
-    errno = 0;
-    int ret = proc_pidinfo(pid, flavor, arg, pti, size);
-    if ((ret <= 0) || ((unsigned long)ret < sizeof(pti))) {
-        psutil_raise_for_pid(pid, "proc_pidinfo()");
-        return 0;
-    }
-    return ret;
-}
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/process_info.h b/contrib/python/psutil/py3/psutil/arch/osx/process_info.h
deleted file mode 100644
index ffa6230f7c..0000000000
--- a/contrib/python/psutil/py3/psutil/arch/osx/process_info.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include <Python.h>
-
-typedef struct kinfo_proc kinfo_proc;
-
-int psutil_is_zombie(pid_t pid);
-int psutil_get_kinfo_proc(pid_t pid, struct kinfo_proc *kp);
-int psutil_get_proc_list(kinfo_proc **procList, size_t *procCount);
-int psutil_proc_pidinfo(
-    pid_t pid, int flavor, uint64_t arg, void *pti, int size);
-PyObject* psutil_get_cmdline(pid_t pid);
-PyObject* psutil_get_environ(pid_t pid);
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/sensors.c b/contrib/python/psutil/py3/psutil/arch/osx/sensors.c
new file mode 100644
index 0000000000..a2faa157c4
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/sensors.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// Sensors related functions. Original code was refactored and moved
+// from psutil/_psutil_osx.c in 2023. This is the GIT blame before the move:
+// https://github.com/giampaolo/psutil/blame/efd7ed3/psutil/_psutil_osx.c
+// Original battery code:
+// https://github.com/giampaolo/psutil/commit/e0df5da
+
+
+#include <Python.h>
+#include <IOKit/ps/IOPowerSources.h>
+#include <IOKit/ps/IOPSKeys.h>
+
+#include "../../_psutil_common.h"
+
+
+PyObject *
+psutil_sensors_battery(PyObject *self, PyObject *args) {
+    PyObject *py_tuple = NULL;
+    CFTypeRef power_info = NULL;
+    CFArrayRef power_sources_list = NULL;
+    CFDictionaryRef power_sources_information = NULL;
+    CFNumberRef capacity_ref = NULL;
+    CFNumberRef time_to_empty_ref = NULL;
+    CFStringRef ps_state_ref = NULL;
+    uint32_t capacity;     /* units are percent */
+    int time_to_empty;     /* units are minutes */
+    int is_power_plugged;
+
+    power_info = IOPSCopyPowerSourcesInfo();
+
+    if (!power_info) {
+        PyErr_SetString(PyExc_RuntimeError,
+            "IOPSCopyPowerSourcesInfo() syscall failed");
+        goto error;
+    }
+
+    power_sources_list = IOPSCopyPowerSourcesList(power_info);
+    if (!power_sources_list) {
+        PyErr_SetString(PyExc_RuntimeError,
+            "IOPSCopyPowerSourcesList() syscall failed");
+        goto error;
+    }
+
+    /* Should only get one source. But in practice, check for > 0 sources */
+    if (!CFArrayGetCount(power_sources_list)) {
+        PyErr_SetString(PyExc_NotImplementedError, "no battery");
+        goto error;
+    }
+
+    power_sources_information = IOPSGetPowerSourceDescription(
+        power_info, CFArrayGetValueAtIndex(power_sources_list, 0));
+
+    capacity_ref = (CFNumberRef)  CFDictionaryGetValue(
+        power_sources_information, CFSTR(kIOPSCurrentCapacityKey));
+    if (!CFNumberGetValue(capacity_ref, kCFNumberSInt32Type, &capacity)) {
+        PyErr_SetString(PyExc_RuntimeError,
+            "No battery capacity infomration in power sources info");
+        goto error;
+    }
+
+    ps_state_ref = (CFStringRef) CFDictionaryGetValue(
+        power_sources_information, CFSTR(kIOPSPowerSourceStateKey));
+    is_power_plugged = CFStringCompare(
+        ps_state_ref, CFSTR(kIOPSACPowerValue), 0)
+        == kCFCompareEqualTo;
+
+    time_to_empty_ref = (CFNumberRef) CFDictionaryGetValue(
+        power_sources_information, CFSTR(kIOPSTimeToEmptyKey));
+    if (!CFNumberGetValue(time_to_empty_ref,
+                          kCFNumberIntType, &time_to_empty)) {
+        /* This value is recommended for non-Apple power sources, so it's not
+         * an error if it doesn't exist. We'll return -1 for "unknown" */
+        /* A value of -1 indicates "Still Calculating the Time" also for
+         * apple power source */
+        time_to_empty = -1;
+    }
+
+    py_tuple = Py_BuildValue("Iii",
+        capacity, time_to_empty, is_power_plugged);
+    if (!py_tuple) {
+        goto error;
+    }
+
+    CFRelease(power_info);
+    CFRelease(power_sources_list);
+    /* Caller should NOT release power_sources_information */
+
+    return py_tuple;
+
+error:
+    if (power_info)
+        CFRelease(power_info);
+    if (power_sources_list)
+        CFRelease(power_sources_list);
+    Py_XDECREF(py_tuple);
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/sensors.h b/contrib/python/psutil/py3/psutil/arch/osx/sensors.h
new file mode 100644
index 0000000000..edace25d3d
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/sensors.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_sensors_battery(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/sys.c b/contrib/python/psutil/py3/psutil/arch/osx/sys.c
new file mode 100644
index 0000000000..4fe6642597
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/sys.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// System related functions. Original code was refactored and moved
+// from psutil/_psutil_osx.c in 2023. This is the GIT blame before the move:
+// https://github.com/giampaolo/psutil/blame/efd7ed3/psutil/_psutil_osx.c
+
+#include <Python.h>
+#include <sys/sysctl.h>
+#include <utmpx.h>
+
+#include "../../_psutil_common.h"
+
+
+PyObject *
+psutil_boot_time(PyObject *self, PyObject *args) {
+    // fetch sysctl "kern.boottime"
+    static int request[2] = { CTL_KERN, KERN_BOOTTIME };
+    struct timeval result;
+    size_t result_len = sizeof result;
+    time_t boot_time = 0;
+
+    if (sysctl(request, 2, &result, &result_len, NULL, 0) == -1)
+        return PyErr_SetFromErrno(PyExc_OSError);
+    boot_time = result.tv_sec;
+    return Py_BuildValue("f", (float)boot_time);
+}
+
+
+PyObject *
+psutil_users(PyObject *self, PyObject *args) {
+    struct utmpx *utx;
+    PyObject *py_username = NULL;
+    PyObject *py_tty = NULL;
+    PyObject *py_hostname = NULL;
+    PyObject *py_tuple = NULL;
+    PyObject *py_retlist = PyList_New(0);
+
+    if (py_retlist == NULL)
+        return NULL;
+    while ((utx = getutxent()) != NULL) {
+        if (utx->ut_type != USER_PROCESS)
+            continue;
+        py_username = PyUnicode_DecodeFSDefault(utx->ut_user);
+        if (! py_username)
+            goto error;
+        py_tty = PyUnicode_DecodeFSDefault(utx->ut_line);
+        if (! py_tty)
+            goto error;
+        py_hostname = PyUnicode_DecodeFSDefault(utx->ut_host);
+        if (! py_hostname)
+            goto error;
+        py_tuple = Py_BuildValue(
+            "(OOOdi)",
+            py_username,              // username
+            py_tty,                   // tty
+            py_hostname,              // hostname
+            (double)utx->ut_tv.tv_sec, // start time
+            utx->ut_pid               // process id
+        );
+        if (!py_tuple) {
+            endutxent();
+            goto error;
+        }
+        if (PyList_Append(py_retlist, py_tuple)) {
+            endutxent();
+            goto error;
+        }
+        Py_CLEAR(py_username);
+        Py_CLEAR(py_tty);
+        Py_CLEAR(py_hostname);
+        Py_CLEAR(py_tuple);
+    }
+
+    endutxent();
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_username);
+    Py_XDECREF(py_tty);
+    Py_XDECREF(py_hostname);
+    Py_XDECREF(py_tuple);
+    Py_DECREF(py_retlist);
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/osx/sys.h b/contrib/python/psutil/py3/psutil/arch/osx/sys.h
new file mode 100644
index 0000000000..344ca21d42
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/osx/sys.h
@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_boot_time(PyObject *self, PyObject *args);
+PyObject *psutil_users(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/cpu.c b/contrib/python/psutil/py3/psutil/arch/windows/cpu.c
index 18f32e5983..9d89e5bb6c 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/cpu.c
+++ b/contrib/python/psutil/py3/psutil/arch/windows/cpu.c
@@ -100,7 +100,7 @@ psutil_per_cpu_times(PyObject *self, PyObject *args) {
         goto error;
     }
 
-    // gets cpu time informations
+    // gets cpu time information
     status = NtQuerySystemInformation(
         SystemProcessorPerformanceInformation,
         sppi,
@@ -172,16 +172,15 @@ psutil_cpu_count_logical(PyObject *self, PyObject *args) {
     if (ncpus != 0)
         return Py_BuildValue("I", ncpus);
     else
-        Py_RETURN_NONE;  // mimick os.cpu_count()
+        Py_RETURN_NONE;  // mimic os.cpu_count()
 }
 
 
 /*
- * Return the number of physical CPU cores (hyper-thread CPUs count
- * is excluded).
+ * Return the number of CPU cores (non hyper-threading).
  */
 PyObject *
-psutil_cpu_count_phys(PyObject *self, PyObject *args) {
+psutil_cpu_count_cores(PyObject *self, PyObject *args) {
     DWORD rc;
     PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX buffer = NULL;
     PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX ptr = NULL;
@@ -196,7 +195,7 @@ psutil_cpu_count_phys(PyObject *self, PyObject *args) {
     // than 64 CPUs. See:
     // https://bugs.python.org/issue33166
     if (GetLogicalProcessorInformationEx == NULL) {
-        psutil_debug("Win < 7; cpu_count_phys() forced to None");
+        psutil_debug("Win < 7; cpu_count_cores() forced to None");
         Py_RETURN_NONE;
     }
 
@@ -216,7 +215,7 @@ psutil_cpu_count_phys(PyObject *self, PyObject *args) {
                 }
             }
             else {
-                psutil_debug("GetLogicalProcessorInformationEx() returned ",
+                psutil_debug("GetLogicalProcessorInformationEx() returned %u",
                              GetLastError());
                 goto return_none;
             }
@@ -249,7 +248,7 @@ psutil_cpu_count_phys(PyObject *self, PyObject *args) {
     }
     else {
         psutil_debug("GetLogicalProcessorInformationEx() count was 0");
-        Py_RETURN_NONE;  // mimick os.cpu_count()
+        Py_RETURN_NONE;  // mimic os.cpu_count()
     }
 
 return_none:
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/cpu.h b/contrib/python/psutil/py3/psutil/arch/windows/cpu.h
index d88c221210..1ef3ff1f04 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/cpu.h
+++ b/contrib/python/psutil/py3/psutil/arch/windows/cpu.h
@@ -7,7 +7,7 @@
 #include <Python.h>
 
 PyObject *psutil_cpu_count_logical(PyObject *self, PyObject *args);
-PyObject *psutil_cpu_count_phys(PyObject *self, PyObject *args);
+PyObject *psutil_cpu_count_cores(PyObject *self, PyObject *args);
 PyObject *psutil_cpu_freq(PyObject *self, PyObject *args);
 PyObject *psutil_cpu_stats(PyObject *self, PyObject *args);
 PyObject *psutil_cpu_times(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/disk.c b/contrib/python/psutil/py3/psutil/arch/windows/disk.c
index 2288f22c56..e72e3a7554 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/disk.c
+++ b/contrib/python/psutil/py3/psutil/arch/windows/disk.c
@@ -45,6 +45,8 @@ PyObject *
 psutil_disk_usage(PyObject *self, PyObject *args) {
     BOOL retval;
     ULARGE_INTEGER _, total, free;
+
+#if PY_MAJOR_VERSION <= 2
     char *path;
 
     if (PyArg_ParseTuple(args, "u", &path)) {
@@ -56,7 +58,6 @@ psutil_disk_usage(PyObject *self, PyObject *args) {
 
     // on Python 2 we also want to accept plain strings other
     // than Unicode
-#if PY_MAJOR_VERSION <= 2
     PyErr_Clear();  // drop the argument parsing error
     if (PyArg_ParseTuple(args, "s", &path)) {
         Py_BEGIN_ALLOW_THREADS
@@ -64,15 +65,35 @@ psutil_disk_usage(PyObject *self, PyObject *args) {
         Py_END_ALLOW_THREADS
         goto return_;
     }
-#endif
 
     return NULL;
 
 return_:
     if (retval == 0)
         return PyErr_SetFromWindowsErrWithFilename(0, path);
-    else
-        return Py_BuildValue("(LL)", total.QuadPart, free.QuadPart);
+#else
+    PyObject *py_path;
+    wchar_t *path;
+
+    if (!PyArg_ParseTuple(args, "U", &py_path)) {
+        return NULL;
+    }
+
+    path = PyUnicode_AsWideCharString(py_path, NULL);
+    if (path == NULL) {
+        return NULL;
+    }
+
+    Py_BEGIN_ALLOW_THREADS
+    retval = GetDiskFreeSpaceExW(path, &_, &total, &free);
+    Py_END_ALLOW_THREADS
+
+    PyMem_Free(path);
+
+    if (retval == 0)
+        return PyErr_SetExcFromWindowsErrWithFilenameObject(PyExc_OSError, 0, py_path);
+#endif
+    return Py_BuildValue("(LL)", total.QuadPart, free.QuadPart);
 }
 
 
@@ -202,7 +223,7 @@ psutil_disk_partitions(PyObject *self, PyObject *args) {
     int type;
     int ret;
     unsigned int old_mode = 0;
-    char opts[20];
+    char opts[50];
     HANDLE mp_h;
     BOOL mp_flag= TRUE;
     LPTSTR fs_type[MAX_PATH + 1] = { 0 };
@@ -291,6 +312,7 @@ psutil_disk_partitions(PyObject *self, PyObject *args) {
                 mp_h = FindFirstVolumeMountPoint(
                     drive_letter, mp_buf, MAX_PATH);
                 if (mp_h != INVALID_HANDLE_VALUE) {
+                    mp_flag = TRUE;
                     while (mp_flag) {
                         // Append full mount path with drive letter
                         strcpy_s(mp_path, _countof(mp_path), drive_letter);
@@ -365,7 +387,7 @@ error:
  If no match is found return an empty string.
 */
 PyObject *
-psutil_win32_QueryDosDevice(PyObject *self, PyObject *args) {
+psutil_QueryDosDevice(PyObject *self, PyObject *args) {
     LPCTSTR lpDevicePath;
     TCHAR d = TEXT('A');
     TCHAR szBuff[5];
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/disk.h b/contrib/python/psutil/py3/psutil/arch/windows/disk.h
index 298fb6ba0e..28bed22b54 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/disk.h
+++ b/contrib/python/psutil/py3/psutil/arch/windows/disk.h
@@ -9,4 +9,4 @@
 PyObject *psutil_disk_io_counters(PyObject *self, PyObject *args);
 PyObject *psutil_disk_partitions(PyObject *self, PyObject *args);
 PyObject *psutil_disk_usage(PyObject *self, PyObject *args);
-PyObject *psutil_win32_QueryDosDevice(PyObject *self, PyObject *args);
+PyObject *psutil_QueryDosDevice(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/mem.c b/contrib/python/psutil/py3/psutil/arch/windows/mem.c
new file mode 100644
index 0000000000..24dc15ad0e
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/windows/mem.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+#include <windows.h>
+#include <Psapi.h>
+#include <pdh.h>
+
+#include "../../_psutil_common.h"
+
+
+PyObject *
+psutil_getpagesize(PyObject *self, PyObject *args) {
+    // XXX: we may want to use GetNativeSystemInfo to differentiate
+    // page size for WoW64 processes (but am not sure).
+    return Py_BuildValue("I", PSUTIL_SYSTEM_INFO.dwPageSize);
+}
+
+
+PyObject *
+psutil_virtual_mem(PyObject *self, PyObject *args) {
+    unsigned long long totalPhys, availPhys, totalSys, availSys, pageSize;
+    PERFORMANCE_INFORMATION perfInfo;
+
+    if (! GetPerformanceInfo(&perfInfo, sizeof(PERFORMANCE_INFORMATION))) {
+        PyErr_SetFromWindowsErr(0);
+        return NULL;
+    }
+    // values are size_t, widen (if needed) to long long
+    pageSize = perfInfo.PageSize;
+    totalPhys = perfInfo.PhysicalTotal * pageSize;
+    availPhys = perfInfo.PhysicalAvailable * pageSize;
+    totalSys = perfInfo.CommitLimit * pageSize;
+    availSys = totalSys - perfInfo.CommitTotal * pageSize;
+    return Py_BuildValue(
+        "(LLLL)",
+        totalPhys,
+        availPhys,
+        totalSys,
+        availSys);
+}
+
+
+// Return a float representing the percent usage of all paging files on
+// the system.
+PyObject *
+psutil_swap_percent(PyObject *self, PyObject *args) {
+    WCHAR *szCounterPath = L"\\Paging File(_Total)\\% Usage";
+    PDH_STATUS s;
+    HQUERY hQuery;
+    HCOUNTER hCounter;
+    PDH_FMT_COUNTERVALUE counterValue;
+    double percentUsage;
+
+    if ((PdhOpenQueryW(NULL, 0, &hQuery)) != ERROR_SUCCESS) {
+        PyErr_Format(PyExc_RuntimeError, "PdhOpenQueryW failed");
+        return NULL;
+    }
+
+    s = PdhAddEnglishCounterW(hQuery, szCounterPath, 0, &hCounter);
+    if (s != ERROR_SUCCESS) {
+        PdhCloseQuery(hQuery);
+        PyErr_Format(
+            PyExc_RuntimeError,
+            "PdhAddEnglishCounterW failed. Performance counters may be disabled."
+        );
+        return NULL;
+    }
+
+    s = PdhCollectQueryData(hQuery);
+    if (s != ERROR_SUCCESS) {
+        // If swap disabled this will fail.
+        psutil_debug("PdhCollectQueryData failed; assume swap percent is 0");
+        percentUsage = 0;
+    }
+    else {
+        s = PdhGetFormattedCounterValue(
+            (PDH_HCOUNTER)hCounter, PDH_FMT_DOUBLE, 0, &counterValue);
+        if (s != ERROR_SUCCESS) {
+            PdhCloseQuery(hQuery);
+            PyErr_Format(
+                PyExc_RuntimeError, "PdhGetFormattedCounterValue failed");
+            return NULL;
+        }
+        percentUsage = counterValue.doubleValue;
+    }
+
+    PdhRemoveCounter(hCounter);
+    PdhCloseQuery(hQuery);
+    return Py_BuildValue("d", percentUsage);
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/mem.h b/contrib/python/psutil/py3/psutil/arch/windows/mem.h
new file mode 100644
index 0000000000..48d3dadee6
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/windows/mem.h
@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_getpagesize(PyObject *self, PyObject *args);
+PyObject *psutil_virtual_mem(PyObject *self, PyObject *args);
+PyObject *psutil_swap_percent(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/ntextapi.h b/contrib/python/psutil/py3/psutil/arch/windows/ntextapi.h
index a3cc932470..6323152a59 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/ntextapi.h
+++ b/contrib/python/psutil/py3/psutil/arch/windows/ntextapi.h
@@ -403,7 +403,7 @@ typedef struct _WTSINFOW {
 
 #define PWTSINFO PWTSINFOW
 
-// cpu_count_phys()
+// cpu_count_cores()
 #if (_WIN32_WINNT < 0x0601)  // Windows < 7 (Vista and XP)
 typedef struct _SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX {
     LOGICAL_PROCESSOR_RELATIONSHIP Relationship;
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/proc.c b/contrib/python/psutil/py3/psutil/arch/windows/proc.c
new file mode 100644
index 0000000000..af3df267ac
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/windows/proc.c
@@ -0,0 +1,1251 @@
+/*
+ * Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+ * Process related functions. Original code was moved in here from
+ * psutil/_psutil_windows.c in 2023. For reference, here's the GIT blame
+ * history before the move:
+ * https://github.com/giampaolo/psutil/blame/59504a5/psutil/_psutil_windows.c
+*/
+
+// Fixes clash between winsock2.h and windows.h
+#define WIN32_LEAN_AND_MEAN
+
+#include <Python.h>
+#include <windows.h>
+#include <Psapi.h>  // memory_info(), memory_maps()
+#include <signal.h>
+#include <tlhelp32.h>  // threads(), PROCESSENTRY32
+
+// Link with Iphlpapi.lib
+#pragma comment(lib, "IPHLPAPI.lib")
+
+#include "../../_psutil_common.h"
+#include "proc.h"
+#include "proc_info.h"
+#include "proc_handles.h"
+#include "proc_utils.h"
+
+
+// Raised by Process.wait().
+PyObject *TimeoutExpired;
+PyObject *TimeoutAbandoned;
+
+
+/*
+ * Return 1 if PID exists in the current process list, else 0.
+ */
+PyObject *
+psutil_pid_exists(PyObject *self, PyObject *args) {
+    DWORD pid;
+    int status;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    status = psutil_pid_is_running(pid);
+    if (-1 == status)
+        return NULL; // exception raised in psutil_pid_is_running()
+    return PyBool_FromLong(status);
+}
+
+
+/*
+ * Return a Python list of all the PIDs running on the system.
+ */
+PyObject *
+psutil_pids(PyObject *self, PyObject *args) {
+    DWORD *proclist = NULL;
+    DWORD numberOfReturnedPIDs;
+    DWORD i;
+    PyObject *py_pid = NULL;
+    PyObject *py_retlist = PyList_New(0);
+
+    if (py_retlist == NULL)
+        return NULL;
+    proclist = psutil_get_pids(&numberOfReturnedPIDs);
+    if (proclist == NULL)
+        goto error;
+
+    for (i = 0; i < numberOfReturnedPIDs; i++) {
+        py_pid = PyLong_FromPid(proclist[i]);
+        if (!py_pid)
+            goto error;
+        if (PyList_Append(py_retlist, py_pid))
+            goto error;
+        Py_CLEAR(py_pid);
+    }
+
+    // free C array allocated for PIDs
+    free(proclist);
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_pid);
+    Py_DECREF(py_retlist);
+    if (proclist != NULL)
+        free(proclist);
+    return NULL;
+}
+
+
+/*
+ * Kill a process given its PID.
+ */
+PyObject *
+psutil_proc_kill(PyObject *self, PyObject *args) {
+    HANDLE hProcess;
+    DWORD pid;
+    DWORD access = PROCESS_TERMINATE | PROCESS_QUERY_LIMITED_INFORMATION;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    if (pid == 0)
+        return AccessDenied("automatically set for PID 0");
+
+    hProcess = psutil_handle_from_pid(pid, access);
+    if (hProcess == NULL) {
+        return NULL;
+    }
+
+    if (! TerminateProcess(hProcess, SIGTERM)) {
+        // ERROR_ACCESS_DENIED may happen if the process already died. See:
+        // https://github.com/giampaolo/psutil/issues/1099
+        // http://bugs.python.org/issue14252
+        if (GetLastError() != ERROR_ACCESS_DENIED) {
+            PyErr_SetFromOSErrnoWithSyscall("TerminateProcess");
+            return NULL;
+        }
+    }
+
+    CloseHandle(hProcess);
+    Py_RETURN_NONE;
+}
+
+
+/*
+ * Wait for process to terminate and return its exit code.
+ */
+PyObject *
+psutil_proc_wait(PyObject *self, PyObject *args) {
+    HANDLE hProcess;
+    DWORD ExitCode;
+    DWORD retVal;
+    DWORD pid;
+    long timeout;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "l", &pid, &timeout))
+        return NULL;
+    if (pid == 0)
+        return AccessDenied("automatically set for PID 0");
+
+    hProcess = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
+                           FALSE, pid);
+    if (hProcess == NULL) {
+        if (GetLastError() == ERROR_INVALID_PARAMETER) {
+            // no such process; we do not want to raise NSP but
+            // return None instead.
+            Py_RETURN_NONE;
+        }
+        else {
+            PyErr_SetFromOSErrnoWithSyscall("OpenProcess");
+            return NULL;
+        }
+    }
+
+    // wait until the process has terminated
+    Py_BEGIN_ALLOW_THREADS
+    retVal = WaitForSingleObject(hProcess, timeout);
+    Py_END_ALLOW_THREADS
+
+    // handle return code
+    if (retVal == WAIT_FAILED) {
+        PyErr_SetFromOSErrnoWithSyscall("WaitForSingleObject");
+        CloseHandle(hProcess);
+        return NULL;
+    }
+    if (retVal == WAIT_TIMEOUT) {
+        PyErr_SetString(TimeoutExpired,
+                        "WaitForSingleObject() returned WAIT_TIMEOUT");
+        CloseHandle(hProcess);
+        return NULL;
+    }
+    if (retVal == WAIT_ABANDONED) {
+        psutil_debug("WaitForSingleObject() -> WAIT_ABANDONED");
+        PyErr_SetString(TimeoutAbandoned,
+                        "WaitForSingleObject() returned WAIT_ABANDONED");
+        CloseHandle(hProcess);
+        return NULL;
+    }
+
+    // WaitForSingleObject() returned WAIT_OBJECT_0. It means the
+    // process is gone so we can get its process exit code. The PID
+    // may still stick around though but we'll handle that from Python.
+    if (GetExitCodeProcess(hProcess, &ExitCode) == 0) {
+        PyErr_SetFromOSErrnoWithSyscall("GetExitCodeProcess");
+        CloseHandle(hProcess);
+        return NULL;
+    }
+
+    CloseHandle(hProcess);
+
+#if PY_MAJOR_VERSION >= 3
+    return PyLong_FromLong((long) ExitCode);
+#else
+    return PyInt_FromLong((long) ExitCode);
+#endif
+}
+
+
+/*
+ * Return a Python tuple (user_time, kernel_time)
+ */
+PyObject *
+psutil_proc_times(PyObject *self, PyObject *args) {
+    DWORD       pid;
+    HANDLE      hProcess;
+    FILETIME    ftCreate, ftExit, ftKernel, ftUser;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
+
+    if (hProcess == NULL)
+        return NULL;
+    if (! GetProcessTimes(hProcess, &ftCreate, &ftExit, &ftKernel, &ftUser)) {
+        if (GetLastError() == ERROR_ACCESS_DENIED) {
+            // usually means the process has died so we throw a NoSuchProcess
+            // here
+            NoSuchProcess("GetProcessTimes -> ERROR_ACCESS_DENIED");
+        }
+        else {
+            PyErr_SetFromWindowsErr(0);
+        }
+        CloseHandle(hProcess);
+        return NULL;
+    }
+
+    CloseHandle(hProcess);
+
+    /*
+     * User and kernel times are represented as a FILETIME structure
+     * which contains a 64-bit value representing the number of
+     * 100-nanosecond intervals since January 1, 1601 (UTC):
+     * http://msdn.microsoft.com/en-us/library/ms724284(VS.85).aspx
+     * To convert it into a float representing the seconds that the
+     * process has executed in user/kernel mode I borrowed the code
+     * below from Python's Modules/posixmodule.c
+     */
+    return Py_BuildValue(
+       "(ddd)",
+       (double)(ftUser.dwHighDateTime * HI_T + \
+                ftUser.dwLowDateTime * LO_T),
+       (double)(ftKernel.dwHighDateTime * HI_T + \
+                ftKernel.dwLowDateTime * LO_T),
+       psutil_FiletimeToUnixTime(ftCreate)
+   );
+}
+
+
+/*
+ * Return process executable path. Works for all processes regardless of
+ * privilege. NtQuerySystemInformation has some sort of internal cache,
+ * since it succeeds even when a process is gone (but not if a PID never
+ * existed).
+ */
+PyObject *
+psutil_proc_exe(PyObject *self, PyObject *args) {
+    DWORD pid;
+    NTSTATUS status;
+    PVOID buffer = NULL;
+    ULONG bufferSize = 0x104 * 2; // WIN_MAX_PATH * sizeof(wchar_t)
+    SYSTEM_PROCESS_ID_INFORMATION processIdInfo;
+    PyObject *py_exe;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    if (pid == 0)
+        return AccessDenied("automatically set for PID 0");
+
+    // ...because NtQuerySystemInformation can succeed for terminated
+    // processes.
+    if (psutil_pid_is_running(pid) == 0)
+        return NoSuchProcess("psutil_pid_is_running -> 0");
+
+    buffer = MALLOC_ZERO(bufferSize);
+    if (! buffer) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+
+    processIdInfo.ProcessId = (HANDLE)(ULONG_PTR)pid;
+    processIdInfo.ImageName.Length = 0;
+    processIdInfo.ImageName.MaximumLength = (USHORT)bufferSize;
+    processIdInfo.ImageName.Buffer = buffer;
+
+    status = NtQuerySystemInformation(
+        SystemProcessIdInformation,
+        &processIdInfo,
+        sizeof(SYSTEM_PROCESS_ID_INFORMATION),
+        NULL);
+
+    if ((status == STATUS_INFO_LENGTH_MISMATCH) &&
+            (processIdInfo.ImageName.MaximumLength <= bufferSize))
+    {
+        // Required length was NOT stored in MaximumLength (WOW64 issue).
+        ULONG maxBufferSize = 0x7FFF * 2;  // NTFS_MAX_PATH * sizeof(wchar_t)
+        do {
+            // Iteratively double the size of the buffer up to maxBufferSize
+            bufferSize *= 2;
+            FREE(buffer);
+            buffer = MALLOC_ZERO(bufferSize);
+            if (! buffer) {
+                PyErr_NoMemory();
+                return NULL;
+            }
+
+            processIdInfo.ImageName.MaximumLength = (USHORT)bufferSize;
+            processIdInfo.ImageName.Buffer = buffer;
+
+            status = NtQuerySystemInformation(
+                SystemProcessIdInformation,
+                &processIdInfo,
+                sizeof(SYSTEM_PROCESS_ID_INFORMATION),
+                NULL);
+        } while ((status == STATUS_INFO_LENGTH_MISMATCH) &&
+                    (bufferSize <= maxBufferSize));
+    }
+    else if (status == STATUS_INFO_LENGTH_MISMATCH) {
+        // Required length is stored in MaximumLength.
+        FREE(buffer);
+        buffer = MALLOC_ZERO(processIdInfo.ImageName.MaximumLength);
+        if (! buffer) {
+            PyErr_NoMemory();
+            return NULL;
+        }
+
+        processIdInfo.ImageName.Buffer = buffer;
+
+        status = NtQuerySystemInformation(
+            SystemProcessIdInformation,
+            &processIdInfo,
+            sizeof(SYSTEM_PROCESS_ID_INFORMATION),
+            NULL);
+    }
+
+    if (! NT_SUCCESS(status)) {
+        FREE(buffer);
+        if (psutil_pid_is_running(pid) == 0)
+            NoSuchProcess("psutil_pid_is_running -> 0");
+        else
+            psutil_SetFromNTStatusErr(status, "NtQuerySystemInformation");
+        return NULL;
+    }
+
+    if (processIdInfo.ImageName.Buffer == NULL) {
+        // Happens for PID 4.
+        py_exe = Py_BuildValue("s", "");
+    }
+    else {
+        py_exe = PyUnicode_FromWideChar(processIdInfo.ImageName.Buffer,
+                                        processIdInfo.ImageName.Length / 2);
+    }
+    FREE(buffer);
+    return py_exe;
+}
+
+
+/*
+ * Return process memory information as a Python tuple.
+ */
+PyObject *
+psutil_proc_memory_info(PyObject *self, PyObject *args) {
+    HANDLE hProcess;
+    DWORD pid;
+    PROCESS_MEMORY_COUNTERS_EX cnt;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
+    if (NULL == hProcess)
+        return NULL;
+
+    if (! GetProcessMemoryInfo(hProcess, (PPROCESS_MEMORY_COUNTERS)&cnt,
+                               sizeof(cnt))) {
+        PyErr_SetFromWindowsErr(0);
+        CloseHandle(hProcess);
+        return NULL;
+    }
+    CloseHandle(hProcess);
+
+    // PROCESS_MEMORY_COUNTERS values are defined as SIZE_T which on 64bits
+    // is an (unsigned long long) and on 32bits is an (unsigned int).
+    // "_WIN64" is defined if we're running a 64bit Python interpreter not
+    // exclusively if the *system* is 64bit.
+#if defined(_WIN64)
+    return Py_BuildValue(
+        "(kKKKKKKKKK)",
+        cnt.PageFaultCount,  // unsigned long
+        (unsigned long long)cnt.PeakWorkingSetSize,
+        (unsigned long long)cnt.WorkingSetSize,
+        (unsigned long long)cnt.QuotaPeakPagedPoolUsage,
+        (unsigned long long)cnt.QuotaPagedPoolUsage,
+        (unsigned long long)cnt.QuotaPeakNonPagedPoolUsage,
+        (unsigned long long)cnt.QuotaNonPagedPoolUsage,
+        (unsigned long long)cnt.PagefileUsage,
+        (unsigned long long)cnt.PeakPagefileUsage,
+        (unsigned long long)cnt.PrivateUsage);
+#else
+    return Py_BuildValue(
+        "(kIIIIIIIII)",
+        cnt.PageFaultCount,    // unsigned long
+        (unsigned int)cnt.PeakWorkingSetSize,
+        (unsigned int)cnt.WorkingSetSize,
+        (unsigned int)cnt.QuotaPeakPagedPoolUsage,
+        (unsigned int)cnt.QuotaPagedPoolUsage,
+        (unsigned int)cnt.QuotaPeakNonPagedPoolUsage,
+        (unsigned int)cnt.QuotaNonPagedPoolUsage,
+        (unsigned int)cnt.PagefileUsage,
+        (unsigned int)cnt.PeakPagefileUsage,
+        (unsigned int)cnt.PrivateUsage);
+#endif
+}
+
+
+static int
+psutil_GetProcWsetInformation(
+        DWORD pid,
+        HANDLE hProcess,
+        PMEMORY_WORKING_SET_INFORMATION *wSetInfo)
+{
+    NTSTATUS status;
+    PVOID buffer;
+    SIZE_T bufferSize;
+
+    bufferSize = 0x8000;
+    buffer = MALLOC_ZERO(bufferSize);
+    if (! buffer) {
+        PyErr_NoMemory();
+        return 1;
+    }
+
+    while ((status = NtQueryVirtualMemory(
+            hProcess,
+            NULL,
+            MemoryWorkingSetInformation,
+            buffer,
+            bufferSize,
+            NULL)) == STATUS_INFO_LENGTH_MISMATCH)
+    {
+        FREE(buffer);
+        bufferSize *= 2;
+        // Fail if we're resizing the buffer to something very large.
+        if (bufferSize > 256 * 1024 * 1024) {
+            PyErr_SetString(PyExc_RuntimeError,
+                            "NtQueryVirtualMemory bufsize is too large");
+            return 1;
+        }
+        buffer = MALLOC_ZERO(bufferSize);
+        if (! buffer) {
+            PyErr_NoMemory();
+            return 1;
+        }
+    }
+
+    if (!NT_SUCCESS(status)) {
+        if (status == STATUS_ACCESS_DENIED) {
+            AccessDenied("NtQueryVirtualMemory -> STATUS_ACCESS_DENIED");
+        }
+        else if (psutil_pid_is_running(pid) == 0) {
+            NoSuchProcess("psutil_pid_is_running -> 0");
+        }
+        else {
+            PyErr_Clear();
+            psutil_SetFromNTStatusErr(
+                status, "NtQueryVirtualMemory(MemoryWorkingSetInformation)");
+        }
+        HeapFree(GetProcessHeap(), 0, buffer);
+        return 1;
+    }
+
+    *wSetInfo = (PMEMORY_WORKING_SET_INFORMATION)buffer;
+    return 0;
+}
+
+
+/*
+ * Returns the USS of the process.
+ * Reference:
+ * https://dxr.mozilla.org/mozilla-central/source/xpcom/base/
+ *     nsMemoryReporterManager.cpp
+ */
+PyObject *
+psutil_proc_memory_uss(PyObject *self, PyObject *args) {
+    DWORD pid;
+    HANDLE hProcess;
+    PSUTIL_PROCESS_WS_COUNTERS wsCounters;
+    PMEMORY_WORKING_SET_INFORMATION wsInfo;
+    ULONG_PTR i;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_INFORMATION);
+    if (hProcess == NULL)
+        return NULL;
+
+    if (psutil_GetProcWsetInformation(pid, hProcess, &wsInfo) != 0) {
+        CloseHandle(hProcess);
+        return NULL;
+    }
+    memset(&wsCounters, 0, sizeof(PSUTIL_PROCESS_WS_COUNTERS));
+
+    for (i = 0; i < wsInfo->NumberOfEntries; i++) {
+        // This is what ProcessHacker does.
+        /*
+        wsCounters.NumberOfPages++;
+        if (wsInfo->WorkingSetInfo[i].ShareCount > 1)
+            wsCounters.NumberOfSharedPages++;
+        if (wsInfo->WorkingSetInfo[i].ShareCount == 0)
+            wsCounters.NumberOfPrivatePages++;
+        if (wsInfo->WorkingSetInfo[i].Shared)
+            wsCounters.NumberOfShareablePages++;
+        */
+
+        // This is what we do: count shared pages that only one process
+        // is using as private (USS).
+        if (!wsInfo->WorkingSetInfo[i].Shared ||
+                wsInfo->WorkingSetInfo[i].ShareCount <= 1) {
+            wsCounters.NumberOfPrivatePages++;
+        }
+    }
+
+    HeapFree(GetProcessHeap(), 0, wsInfo);
+    CloseHandle(hProcess);
+
+    return Py_BuildValue("I", wsCounters.NumberOfPrivatePages);
+}
+
+
+/*
+ * Resume or suspends a process
+ */
+PyObject *
+psutil_proc_suspend_or_resume(PyObject *self, PyObject *args) {
+    DWORD pid;
+    NTSTATUS status;
+    HANDLE hProcess;
+    DWORD access = PROCESS_SUSPEND_RESUME | PROCESS_QUERY_LIMITED_INFORMATION;
+    PyObject* suspend;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "O", &pid, &suspend))
+        return NULL;
+
+    hProcess = psutil_handle_from_pid(pid, access);
+    if (hProcess == NULL)
+        return NULL;
+
+    if (PyObject_IsTrue(suspend))
+        status = NtSuspendProcess(hProcess);
+    else
+        status = NtResumeProcess(hProcess);
+
+    if (! NT_SUCCESS(status)) {
+        CloseHandle(hProcess);
+        return psutil_SetFromNTStatusErr(status, "NtSuspend|ResumeProcess");
+    }
+
+    CloseHandle(hProcess);
+    Py_RETURN_NONE;
+}
+
+
+PyObject *
+psutil_proc_threads(PyObject *self, PyObject *args) {
+    HANDLE hThread = NULL;
+    THREADENTRY32 te32 = {0};
+    DWORD pid;
+    int pid_return;
+    int rc;
+    FILETIME ftDummy, ftKernel, ftUser;
+    HANDLE hThreadSnap = NULL;
+    PyObject *py_tuple = NULL;
+    PyObject *py_retlist = PyList_New(0);
+
+    if (py_retlist == NULL)
+        return NULL;
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        goto error;
+    if (pid == 0) {
+        // raise AD instead of returning 0 as procexp is able to
+        // retrieve useful information somehow
+        AccessDenied("forced for PID 0");
+        goto error;
+    }
+
+    pid_return = psutil_pid_is_running(pid);
+    if (pid_return == 0) {
+        NoSuchProcess("psutil_pid_is_running -> 0");
+        goto error;
+    }
+    if (pid_return == -1)
+        goto error;
+
+    hThreadSnap = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
+    if (hThreadSnap == INVALID_HANDLE_VALUE) {
+        PyErr_SetFromOSErrnoWithSyscall("CreateToolhelp32Snapshot");
+        goto error;
+    }
+
+    // Fill in the size of the structure before using it
+    te32.dwSize = sizeof(THREADENTRY32);
+
+    if (! Thread32First(hThreadSnap, &te32)) {
+        PyErr_SetFromOSErrnoWithSyscall("Thread32First");
+        goto error;
+    }
+
+    // Walk the thread snapshot to find all threads of the process.
+    // If the thread belongs to the process, increase the counter.
+    do {
+        if (te32.th32OwnerProcessID == pid) {
+            py_tuple = NULL;
+            hThread = NULL;
+            hThread = OpenThread(THREAD_QUERY_INFORMATION,
+                                 FALSE, te32.th32ThreadID);
+            if (hThread == NULL) {
+                // thread has disappeared on us
+                continue;
+            }
+
+            rc = GetThreadTimes(hThread, &ftDummy, &ftDummy, &ftKernel,
+                                &ftUser);
+            if (rc == 0) {
+                PyErr_SetFromOSErrnoWithSyscall("GetThreadTimes");
+                goto error;
+            }
+
+            /*
+             * User and kernel times are represented as a FILETIME structure
+             * which contains a 64-bit value representing the number of
+             * 100-nanosecond intervals since January 1, 1601 (UTC):
+             * http://msdn.microsoft.com/en-us/library/ms724284(VS.85).aspx
+             * To convert it into a float representing the seconds that the
+             * process has executed in user/kernel mode I borrowed the code
+             * below from Python's Modules/posixmodule.c
+             */
+            py_tuple = Py_BuildValue(
+                "kdd",
+                te32.th32ThreadID,
+                (double)(ftUser.dwHighDateTime * HI_T + \
+                         ftUser.dwLowDateTime * LO_T),
+                (double)(ftKernel.dwHighDateTime * HI_T + \
+                         ftKernel.dwLowDateTime * LO_T));
+            if (!py_tuple)
+                goto error;
+            if (PyList_Append(py_retlist, py_tuple))
+                goto error;
+            Py_CLEAR(py_tuple);
+
+            CloseHandle(hThread);
+        }
+    } while (Thread32Next(hThreadSnap, &te32));
+
+    CloseHandle(hThreadSnap);
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_tuple);
+    Py_DECREF(py_retlist);
+    if (hThread != NULL)
+        CloseHandle(hThread);
+    if (hThreadSnap != NULL)
+        CloseHandle(hThreadSnap);
+    return NULL;
+}
+
+
+PyObject *
+psutil_proc_open_files(PyObject *self, PyObject *args) {
+    DWORD pid;
+    HANDLE processHandle;
+    DWORD access = PROCESS_DUP_HANDLE | PROCESS_QUERY_INFORMATION;
+    PyObject *py_retlist;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    processHandle = psutil_handle_from_pid(pid, access);
+    if (processHandle == NULL)
+        return NULL;
+
+    py_retlist = psutil_get_open_files(pid, processHandle);
+    CloseHandle(processHandle);
+    return py_retlist;
+}
+
+
+static PTOKEN_USER
+_psutil_user_token_from_pid(DWORD pid) {
+    HANDLE hProcess = NULL;
+    HANDLE hToken = NULL;
+    PTOKEN_USER userToken = NULL;
+    ULONG bufferSize = 0x100;
+
+    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
+    if (hProcess == NULL)
+        return NULL;
+
+    if (!OpenProcessToken(hProcess, TOKEN_QUERY, &hToken)) {
+        PyErr_SetFromOSErrnoWithSyscall("OpenProcessToken");
+        goto error;
+    }
+
+    // Get the user SID.
+    while (1) {
+        userToken = malloc(bufferSize);
+        if (userToken == NULL) {
+            PyErr_NoMemory();
+            goto error;
+        }
+        if (!GetTokenInformation(hToken, TokenUser, userToken, bufferSize,
+                                 &bufferSize))
+        {
+            if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
+                free(userToken);
+                continue;
+            }
+            else {
+                PyErr_SetFromOSErrnoWithSyscall("GetTokenInformation");
+                goto error;
+            }
+        }
+        break;
+    }
+
+    CloseHandle(hProcess);
+    CloseHandle(hToken);
+    return userToken;
+
+error:
+    if (hProcess != NULL)
+        CloseHandle(hProcess);
+    if (hToken != NULL)
+        CloseHandle(hToken);
+    return NULL;
+}
+
+
+/*
+ * Return process username as a "DOMAIN//USERNAME" string.
+ */
+PyObject *
+psutil_proc_username(PyObject *self, PyObject *args) {
+    DWORD pid;
+    PTOKEN_USER userToken = NULL;
+    WCHAR *userName = NULL;
+    WCHAR *domainName = NULL;
+    ULONG nameSize = 0x100;
+    ULONG domainNameSize = 0x100;
+    SID_NAME_USE nameUse;
+    PyObject *py_username = NULL;
+    PyObject *py_domain = NULL;
+    PyObject *py_tuple = NULL;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    userToken = _psutil_user_token_from_pid(pid);
+    if (userToken == NULL)
+        return NULL;
+
+    // resolve the SID to a name
+    while (1) {
+        userName = malloc(nameSize * sizeof(WCHAR));
+        if (userName == NULL) {
+            PyErr_NoMemory();
+            goto error;
+        }
+        domainName = malloc(domainNameSize * sizeof(WCHAR));
+        if (domainName == NULL) {
+            PyErr_NoMemory();
+            goto error;
+        }
+        if (!LookupAccountSidW(NULL, userToken->User.Sid, userName, &nameSize,
+                               domainName, &domainNameSize, &nameUse))
+        {
+            if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
+                free(userName);
+                free(domainName);
+                continue;
+            }
+            else if (GetLastError() == ERROR_NONE_MAPPED) {
+                // From MS doc:
+                // https://docs.microsoft.com/en-us/windows/win32/api/winbase/
+                //     nf-winbase-lookupaccountsida
+                // If the function cannot find an account name for the SID,
+                // GetLastError returns ERROR_NONE_MAPPED. This can occur if
+                // a network time-out prevents the function from finding the
+                // name. It also occurs for SIDs that have no corresponding
+                // account name, such as a logon SID that identifies a logon
+                // session.
+                AccessDenied("LookupAccountSidW -> ERROR_NONE_MAPPED");
+                goto error;
+            }
+            else {
+                PyErr_SetFromOSErrnoWithSyscall("LookupAccountSidW");
+                goto error;
+            }
+        }
+        break;
+    }
+
+    py_domain = PyUnicode_FromWideChar(domainName, wcslen(domainName));
+    if (! py_domain)
+        goto error;
+    py_username = PyUnicode_FromWideChar(userName, wcslen(userName));
+    if (! py_username)
+        goto error;
+    py_tuple = Py_BuildValue("OO", py_domain, py_username);
+    if (! py_tuple)
+        goto error;
+    Py_DECREF(py_domain);
+    Py_DECREF(py_username);
+
+    free(userName);
+    free(domainName);
+    free(userToken);
+    return py_tuple;
+
+error:
+    if (userName != NULL)
+        free(userName);
+    if (domainName != NULL)
+        free(domainName);
+    if (userToken != NULL)
+        free(userToken);
+    Py_XDECREF(py_domain);
+    Py_XDECREF(py_username);
+    Py_XDECREF(py_tuple);
+    return NULL;
+}
+
+
+/*
+ * Get process priority as a Python integer.
+ */
+PyObject *
+psutil_proc_priority_get(PyObject *self, PyObject *args) {
+    DWORD pid;
+    DWORD priority;
+    HANDLE hProcess;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
+    if (hProcess == NULL)
+        return NULL;
+
+    priority = GetPriorityClass(hProcess);
+    if (priority == 0) {
+        PyErr_SetFromWindowsErr(0);
+        CloseHandle(hProcess);
+        return NULL;
+    }
+    CloseHandle(hProcess);
+    return Py_BuildValue("i", priority);
+}
+
+
+/*
+ * Set process priority.
+ */
+PyObject *
+psutil_proc_priority_set(PyObject *self, PyObject *args) {
+    DWORD pid;
+    int priority;
+    int retval;
+    HANDLE hProcess;
+    DWORD access = PROCESS_QUERY_INFORMATION | PROCESS_SET_INFORMATION;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "i", &pid, &priority))
+        return NULL;
+    hProcess = psutil_handle_from_pid(pid, access);
+    if (hProcess == NULL)
+        return NULL;
+
+    retval = SetPriorityClass(hProcess, priority);
+    if (retval == 0) {
+        PyErr_SetFromWindowsErr(0);
+        CloseHandle(hProcess);
+        return NULL;
+    }
+
+    CloseHandle(hProcess);
+    Py_RETURN_NONE;
+}
+
+
+/*
+ * Get process IO priority as a Python integer.
+ */
+PyObject *
+psutil_proc_io_priority_get(PyObject *self, PyObject *args) {
+    DWORD pid;
+    HANDLE hProcess;
+    DWORD IoPriority;
+    NTSTATUS status;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
+    if (hProcess == NULL)
+        return NULL;
+
+    status = NtQueryInformationProcess(
+        hProcess,
+        ProcessIoPriority,
+        &IoPriority,
+        sizeof(DWORD),
+        NULL
+    );
+
+    CloseHandle(hProcess);
+    if (! NT_SUCCESS(status))
+        return psutil_SetFromNTStatusErr(status, "NtQueryInformationProcess");
+    return Py_BuildValue("i", IoPriority);
+}
+
+
+/*
+ * Set process IO priority.
+ */
+PyObject *
+psutil_proc_io_priority_set(PyObject *self, PyObject *args) {
+    DWORD pid;
+    DWORD prio;
+    HANDLE hProcess;
+    NTSTATUS status;
+    DWORD access = PROCESS_QUERY_INFORMATION | PROCESS_SET_INFORMATION;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "i", &pid, &prio))
+        return NULL;
+
+    hProcess = psutil_handle_from_pid(pid, access);
+    if (hProcess == NULL)
+        return NULL;
+
+    status = NtSetInformationProcess(
+        hProcess,
+        ProcessIoPriority,
+        (PVOID)&prio,
+        sizeof(DWORD)
+    );
+
+    CloseHandle(hProcess);
+    if (! NT_SUCCESS(status))
+        return psutil_SetFromNTStatusErr(status, "NtSetInformationProcess");
+    Py_RETURN_NONE;
+}
+
+
+/*
+ * Return a Python tuple referencing process I/O counters.
+ */
+PyObject *
+psutil_proc_io_counters(PyObject *self, PyObject *args) {
+    DWORD pid;
+    HANDLE hProcess;
+    IO_COUNTERS IoCounters;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
+    if (NULL == hProcess)
+        return NULL;
+
+    if (! GetProcessIoCounters(hProcess, &IoCounters)) {
+        PyErr_SetFromWindowsErr(0);
+        CloseHandle(hProcess);
+        return NULL;
+    }
+
+    CloseHandle(hProcess);
+    return Py_BuildValue("(KKKKKK)",
+                         IoCounters.ReadOperationCount,
+                         IoCounters.WriteOperationCount,
+                         IoCounters.ReadTransferCount,
+                         IoCounters.WriteTransferCount,
+                         IoCounters.OtherOperationCount,
+                         IoCounters.OtherTransferCount);
+}
+
+
+/*
+ * Return process CPU affinity as a bitmask
+ */
+PyObject *
+psutil_proc_cpu_affinity_get(PyObject *self, PyObject *args) {
+    DWORD pid;
+    HANDLE hProcess;
+    DWORD_PTR proc_mask;
+    DWORD_PTR system_mask;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
+    if (hProcess == NULL) {
+        return NULL;
+    }
+    if (GetProcessAffinityMask(hProcess, &proc_mask, &system_mask) == 0) {
+        PyErr_SetFromWindowsErr(0);
+        CloseHandle(hProcess);
+        return NULL;
+    }
+
+    CloseHandle(hProcess);
+#ifdef _WIN64
+    return Py_BuildValue("K", (unsigned long long)proc_mask);
+#else
+    return Py_BuildValue("k", (unsigned long)proc_mask);
+#endif
+}
+
+
+/*
+ * Set process CPU affinity
+ */
+PyObject *
+psutil_proc_cpu_affinity_set(PyObject *self, PyObject *args) {
+    DWORD pid;
+    HANDLE hProcess;
+    DWORD access = PROCESS_QUERY_INFORMATION | PROCESS_SET_INFORMATION;
+    DWORD_PTR mask;
+
+#ifdef _WIN64
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "K", &pid, &mask))
+#else
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID "k", &pid, &mask))
+#endif
+    {
+        return NULL;
+    }
+    hProcess = psutil_handle_from_pid(pid, access);
+    if (hProcess == NULL)
+        return NULL;
+
+    if (SetProcessAffinityMask(hProcess, mask) == 0) {
+        PyErr_SetFromWindowsErr(0);
+        CloseHandle(hProcess);
+        return NULL;
+    }
+
+    CloseHandle(hProcess);
+    Py_RETURN_NONE;
+}
+
+
+/*
+ * Return True if all process threads are in waiting/suspended state.
+ */
+PyObject *
+psutil_proc_is_suspended(PyObject *self, PyObject *args) {
+    DWORD pid;
+    ULONG i;
+    PSYSTEM_PROCESS_INFORMATION process;
+    PVOID buffer;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    if (! psutil_get_proc_info(pid, &process, &buffer))
+        return NULL;
+    for (i = 0; i < process->NumberOfThreads; i++) {
+        if (process->Threads[i].ThreadState != Waiting ||
+                process->Threads[i].WaitReason != Suspended)
+        {
+            free(buffer);
+            Py_RETURN_FALSE;
+        }
+    }
+    free(buffer);
+    Py_RETURN_TRUE;
+}
+
+
+/*
+ * Return the number of handles opened by process.
+ */
+PyObject *
+psutil_proc_num_handles(PyObject *self, PyObject *args) {
+    DWORD pid;
+    HANDLE hProcess;
+    DWORD handleCount;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    hProcess = psutil_handle_from_pid(pid, PROCESS_QUERY_LIMITED_INFORMATION);
+    if (NULL == hProcess)
+        return NULL;
+    if (! GetProcessHandleCount(hProcess, &handleCount)) {
+        PyErr_SetFromWindowsErr(0);
+        CloseHandle(hProcess);
+        return NULL;
+    }
+    CloseHandle(hProcess);
+    return Py_BuildValue("k", handleCount);
+}
+
+
+static char *get_region_protection_string(ULONG protection) {
+    switch (protection & 0xff) {
+        case PAGE_NOACCESS:
+            return "";
+        case PAGE_READONLY:
+            return "r";
+        case PAGE_READWRITE:
+            return "rw";
+        case PAGE_WRITECOPY:
+            return "wc";
+        case PAGE_EXECUTE:
+            return "x";
+        case PAGE_EXECUTE_READ:
+            return "xr";
+        case PAGE_EXECUTE_READWRITE:
+            return "xrw";
+        case PAGE_EXECUTE_WRITECOPY:
+            return "xwc";
+        default:
+            return "?";
+    }
+}
+
+
+/*
+ * Return a list of process's memory mappings.
+ */
+PyObject *
+psutil_proc_memory_maps(PyObject *self, PyObject *args) {
+    MEMORY_BASIC_INFORMATION basicInfo;
+    DWORD pid;
+    HANDLE hProcess = NULL;
+    PVOID baseAddress;
+    WCHAR mappedFileName[MAX_PATH];
+    LPVOID maxAddr;
+    // required by GetMappedFileNameW
+    DWORD access = PROCESS_QUERY_INFORMATION | PROCESS_VM_READ;
+    PyObject *py_retlist = PyList_New(0);
+    PyObject *py_tuple = NULL;
+    PyObject *py_str = NULL;
+
+    if (py_retlist == NULL)
+        return NULL;
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        goto error;
+    hProcess = psutil_handle_from_pid(pid, access);
+    if (NULL == hProcess)
+        goto error;
+
+    maxAddr = PSUTIL_SYSTEM_INFO.lpMaximumApplicationAddress;
+    baseAddress = NULL;
+
+    while (VirtualQueryEx(hProcess, baseAddress, &basicInfo,
+                          sizeof(MEMORY_BASIC_INFORMATION)))
+    {
+        py_tuple = NULL;
+        if (baseAddress > maxAddr)
+            break;
+        if (GetMappedFileNameW(hProcess, baseAddress, mappedFileName,
+                               sizeof(mappedFileName)))
+        {
+            py_str = PyUnicode_FromWideChar(mappedFileName,
+                                            wcslen(mappedFileName));
+            if (py_str == NULL)
+                goto error;
+#ifdef _WIN64
+           py_tuple = Py_BuildValue(
+              "(KsOI)",
+              (unsigned long long)baseAddress,
+#else
+           py_tuple = Py_BuildValue(
+              "(ksOI)",
+              (unsigned long)baseAddress,
+#endif
+              get_region_protection_string(basicInfo.Protect),
+              py_str,
+              basicInfo.RegionSize);
+
+            if (!py_tuple)
+                goto error;
+            if (PyList_Append(py_retlist, py_tuple))
+                goto error;
+            Py_CLEAR(py_tuple);
+            Py_CLEAR(py_str);
+        }
+        baseAddress = (PCHAR)baseAddress + basicInfo.RegionSize;
+    }
+
+    CloseHandle(hProcess);
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_tuple);
+    Py_XDECREF(py_str);
+    Py_DECREF(py_retlist);
+    if (hProcess != NULL)
+        CloseHandle(hProcess);
+    return NULL;
+}
+
+
+/*
+ * Return a {pid:ppid, ...} dict for all running processes.
+ */
+PyObject *
+psutil_ppid_map(PyObject *self, PyObject *args) {
+    PyObject *py_pid = NULL;
+    PyObject *py_ppid = NULL;
+    PyObject *py_retdict = PyDict_New();
+    HANDLE handle = NULL;
+    PROCESSENTRY32 pe = {0};
+    pe.dwSize = sizeof(PROCESSENTRY32);
+
+    if (py_retdict == NULL)
+        return NULL;
+    handle = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
+    if (handle == INVALID_HANDLE_VALUE) {
+        PyErr_SetFromWindowsErr(0);
+        Py_DECREF(py_retdict);
+        return NULL;
+    }
+
+    if (Process32First(handle, &pe)) {
+        do {
+            py_pid = PyLong_FromPid(pe.th32ProcessID);
+            if (py_pid == NULL)
+                goto error;
+            py_ppid = PyLong_FromPid(pe.th32ParentProcessID);
+            if (py_ppid == NULL)
+                goto error;
+            if (PyDict_SetItem(py_retdict, py_pid, py_ppid))
+                goto error;
+            Py_CLEAR(py_pid);
+            Py_CLEAR(py_ppid);
+        } while (Process32Next(handle, &pe));
+    }
+
+    CloseHandle(handle);
+    return py_retdict;
+
+error:
+    Py_XDECREF(py_pid);
+    Py_XDECREF(py_ppid);
+    Py_DECREF(py_retdict);
+    CloseHandle(handle);
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/proc.h b/contrib/python/psutil/py3/psutil/arch/windows/proc.h
new file mode 100644
index 0000000000..048d27dd7c
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/windows/proc.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+extern PyObject *TimeoutExpired;
+extern PyObject *TimeoutAbandoned;
+
+PyObject *psutil_pid_exists(PyObject *self, PyObject *args);
+PyObject *psutil_pids(PyObject *self, PyObject *args);
+PyObject *psutil_ppid_map(PyObject *self, PyObject *args);
+PyObject *psutil_proc_cpu_affinity_get(PyObject *self, PyObject *args);
+PyObject *psutil_proc_cpu_affinity_set(PyObject *self, PyObject *args);
+PyObject *psutil_proc_exe(PyObject *self, PyObject *args);
+PyObject *psutil_proc_io_counters(PyObject *self, PyObject *args);
+PyObject *psutil_proc_io_priority_get(PyObject *self, PyObject *args);
+PyObject *psutil_proc_io_priority_set(PyObject *self, PyObject *args);
+PyObject *psutil_proc_is_suspended(PyObject *self, PyObject *args);
+PyObject *psutil_proc_kill(PyObject *self, PyObject *args);
+PyObject *psutil_proc_memory_info(PyObject *self, PyObject *args);
+PyObject *psutil_proc_memory_maps(PyObject *self, PyObject *args);
+PyObject *psutil_proc_memory_uss(PyObject *self, PyObject *args);
+PyObject *psutil_proc_num_handles(PyObject *self, PyObject *args);
+PyObject *psutil_proc_open_files(PyObject *self, PyObject *args);
+PyObject *psutil_proc_priority_get(PyObject *self, PyObject *args);
+PyObject *psutil_proc_priority_set(PyObject *self, PyObject *args);
+PyObject *psutil_proc_suspend_or_resume(PyObject *self, PyObject *args);
+PyObject *psutil_proc_threads(PyObject *self, PyObject *args);
+PyObject *psutil_proc_times(PyObject *self, PyObject *args);
+PyObject *psutil_proc_username(PyObject *self, PyObject *args);
+PyObject *psutil_proc_wait(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/process_handles.c b/contrib/python/psutil/py3/psutil/arch/windows/proc_handles.c
index 72e3f4d41e..30e7cd2d84 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/process_handles.c
+++ b/contrib/python/psutil/py3/psutil/arch/windows/proc_handles.c
@@ -23,7 +23,7 @@
 #include <Python.h>
 
 #include "../../_psutil_common.h"
-#include "process_utils.h"
+#include "proc_utils.h"
 
 
 #define THREAD_TIMEOUT 100  // ms
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/process_handles.h b/contrib/python/psutil/py3/psutil/arch/windows/proc_handles.h
index d1be3152d5..d1be3152d5 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/process_handles.h
+++ b/contrib/python/psutil/py3/psutil/arch/windows/proc_handles.h
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/process_info.c b/contrib/python/psutil/py3/psutil/arch/windows/proc_info.c
index d44c4eb75e..5d16b8133d 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/process_info.c
+++ b/contrib/python/psutil/py3/psutil/arch/windows/proc_info.c
@@ -11,8 +11,8 @@
 #include <windows.h>
 
 #include "../../_psutil_common.h"
-#include "process_info.h"
-#include "process_utils.h"
+#include "proc_info.h"
+#include "proc_utils.h"
 
 
 #ifndef _WIN64
@@ -24,6 +24,13 @@ typedef NTSTATUS (NTAPI *__NtQueryInformationProcess)(
     PDWORD ReturnLength);
 #endif
 
+#define PSUTIL_FIRST_PROCESS(Processes) ( \
+    (PSYSTEM_PROCESS_INFORMATION)(Processes))
+#define PSUTIL_NEXT_PROCESS(Process) ( \
+   ((PSYSTEM_PROCESS_INFORMATION)(Process))->NextEntryOffset ? \
+   (PSYSTEM_PROCESS_INFORMATION)((PCHAR)(Process) + \
+        ((PSYSTEM_PROCESS_INFORMATION)(Process))->NextEntryOffset) : NULL)
+
 
 /*
  * Given a pointer into a process's memory, figure out how much
@@ -535,15 +542,38 @@ error:
  * with given pid or NULL on error.
  */
 PyObject *
-psutil_get_cmdline(DWORD pid, int use_peb) {
-    PyObject *ret = NULL;
+psutil_proc_cmdline(PyObject *self, PyObject *args, PyObject *kwdict) {
     WCHAR *data = NULL;
+    LPWSTR *szArglist = NULL;
     SIZE_T size;
+    int nArgs;
+    int i;
+    int func_ret;
+    DWORD pid;
+    int pid_return;
+    int use_peb;
+    // TODO: shouldn't this be decref-ed in case of error on
+    // PyArg_ParseTuple?
+    PyObject *py_usepeb = Py_True;
     PyObject *py_retlist = NULL;
     PyObject *py_unicode = NULL;
-    LPWSTR *szArglist = NULL;
-    int nArgs, i;
-    int func_ret;
+    static char *keywords[] = {"pid", "use_peb", NULL};
+
+    if (! PyArg_ParseTupleAndKeywords(args, kwdict, _Py_PARSE_PID "|O",
+                                      keywords, &pid, &py_usepeb))
+    {
+        return NULL;
+    }
+    if ((pid == 0) || (pid == 4))
+        return Py_BuildValue("[]");
+
+    pid_return = psutil_pid_is_running(pid);
+    if (pid_return == 0)
+        return NoSuchProcess("psutil_pid_is_running -> 0");
+    if (pid_return == -1)
+        return NULL;
+
+    use_peb = (py_usepeb == Py_True) ? 1 : 0;
 
     /*
     Reading the PEB to get the cmdline seem to be the best method if
@@ -559,47 +589,60 @@ psutil_get_cmdline(DWORD pid, int use_peb) {
     else
         func_ret = psutil_cmdline_query_proc(pid, &data, &size);
     if (func_ret != 0)
-        goto out;
+        goto error;
 
     // attempt to parse the command line using Win32 API
     szArglist = CommandLineToArgvW(data, &nArgs);
     if (szArglist == NULL) {
         PyErr_SetFromOSErrnoWithSyscall("CommandLineToArgvW");
-        goto out;
+        goto error;
     }
 
     // arglist parsed as array of UNICODE_STRING, so convert each to
     // Python string object and add to arg list
     py_retlist = PyList_New(nArgs);
     if (py_retlist == NULL)
-        goto out;
+        goto error;
     for (i = 0; i < nArgs; i++) {
         py_unicode = PyUnicode_FromWideChar(szArglist[i],
             wcslen(szArglist[i]));
         if (py_unicode == NULL)
-            goto out;
-        PyList_SET_ITEM(py_retlist, i, py_unicode);
+            goto error;
+        PyList_SetItem(py_retlist, i, py_unicode);
         py_unicode = NULL;
     }
-    ret = py_retlist;
-    py_retlist = NULL;
 
-out:
+    LocalFree(szArglist);
+    free(data);
+    return py_retlist;
+
+error:
     if (szArglist != NULL)
         LocalFree(szArglist);
     if (data != NULL)
         free(data);
     Py_XDECREF(py_unicode);
     Py_XDECREF(py_retlist);
-    return ret;
+    return NULL;
 }
 
 
 PyObject *
-psutil_get_cwd(DWORD pid) {
+psutil_proc_cwd(PyObject *self, PyObject *args) {
+    DWORD pid;
     PyObject *ret = NULL;
     WCHAR *data = NULL;
     SIZE_T size;
+    int pid_return;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+
+    pid_return = psutil_pid_is_running(pid);
+    if (pid_return == 0)
+        return NoSuchProcess("psutil_pid_is_running -> 0");
+    if (pid_return == -1)
+        return NULL;
 
     if (psutil_get_process_data(pid, KIND_CWD, &data, &size) != 0)
         goto out;
@@ -620,10 +663,23 @@ out:
  * process with given pid or NULL on error.
  */
 PyObject *
-psutil_get_environ(DWORD pid) {
-    PyObject *ret = NULL;
+psutil_proc_environ(PyObject *self, PyObject *args) {
+    DWORD pid;
     WCHAR *data = NULL;
     SIZE_T size;
+    int pid_return;
+    PyObject *ret = NULL;
+
+    if (! PyArg_ParseTuple(args, _Py_PARSE_PID, &pid))
+        return NULL;
+    if ((pid == 0) || (pid == 4))
+        return Py_BuildValue("s", "");
+
+    pid_return = psutil_pid_is_running(pid);
+    if (pid_return == 0)
+        return NoSuchProcess("psutil_pid_is_running -> 0");
+    if (pid_return == -1)
+        return NULL;
 
     if (psutil_get_process_data(pid, KIND_ENVIRON, &data, &size) != 0)
         goto out;
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/process_info.h b/contrib/python/psutil/py3/psutil/arch/windows/proc_info.h
index 5e89ddebdf..b7795451dc 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/process_info.h
+++ b/contrib/python/psutil/py3/psutil/arch/windows/proc_info.h
@@ -5,6 +5,9 @@
  */
 
 #include <Python.h>
+#include <windows.h>
+
+#include "ntextapi.h"
 
 #define PSUTIL_FIRST_PROCESS(Processes) ( \
     (PSYSTEM_PROCESS_INFORMATION)(Processes))
@@ -15,7 +18,7 @@
 
 int psutil_get_proc_info(DWORD pid, PSYSTEM_PROCESS_INFORMATION *retProcess,
                          PVOID *retBuffer);
-PyObject* psutil_get_cmdline(DWORD pid, int use_peb);
-PyObject* psutil_get_cwd(DWORD pid);
-PyObject* psutil_get_environ(DWORD pid);
+PyObject* psutil_proc_cmdline(PyObject *self, PyObject *args, PyObject *kwdict);
+PyObject* psutil_proc_cwd(PyObject *self, PyObject *args);
+PyObject* psutil_proc_environ(PyObject *self, PyObject *args);
 PyObject* psutil_proc_info(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/process_utils.c b/contrib/python/psutil/py3/psutil/arch/windows/proc_utils.c
index acbda301a4..dac1129c0f 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/process_utils.c
+++ b/contrib/python/psutil/py3/psutil/arch/windows/proc_utils.c
@@ -11,7 +11,7 @@
 #include <Psapi.h>  // EnumProcesses
 
 #include "../../_psutil_common.h"
-#include "process_utils.h"
+#include "proc_utils.h"
 
 
 DWORD *
@@ -160,7 +160,7 @@ psutil_handle_from_pid(DWORD pid, DWORD access) {
 }
 
 
-// Check for PID existance. Return 1 if pid exists, 0 if not, -1 on error.
+// Check for PID existence. Return 1 if pid exists, 0 if not, -1 on error.
 int
 psutil_pid_is_running(DWORD pid) {
     HANDLE hProcess;
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/process_utils.h b/contrib/python/psutil/py3/psutil/arch/windows/proc_utils.h
index dca7c991a5..dca7c991a5 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/process_utils.h
+++ b/contrib/python/psutil/py3/psutil/arch/windows/proc_utils.h
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/sensors.c b/contrib/python/psutil/py3/psutil/arch/windows/sensors.c
new file mode 100644
index 0000000000..fbe2c2fe9f
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/windows/sensors.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+#include <windows.h>
+
+
+// Added in https://github.com/giampaolo/psutil/commit/109f873 in 2017.
+// Moved in here in 2023.
+PyObject *
+psutil_sensors_battery(PyObject *self, PyObject *args) {
+    SYSTEM_POWER_STATUS sps;
+
+    if (GetSystemPowerStatus(&sps) == 0) {
+        PyErr_SetFromWindowsErr(0);
+        return NULL;
+    }
+    return Py_BuildValue(
+        "iiiI",
+        sps.ACLineStatus,  // whether AC is connected: 0=no, 1=yes, 255=unknown
+        // status flag:
+        // 1, 2, 4 = high, low, critical
+        // 8 = charging
+        // 128 = no battery
+        sps.BatteryFlag,
+        sps.BatteryLifePercent,  // percent
+        sps.BatteryLifeTime  // remaining secs
+    );
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/sensors.h b/contrib/python/psutil/py3/psutil/arch/windows/sensors.h
new file mode 100644
index 0000000000..edace25d3d
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/windows/sensors.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_sensors_battery(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/services.c b/contrib/python/psutil/py3/psutil/arch/windows/services.c
index a91cb8f797..fa3e646e51 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/services.c
+++ b/contrib/python/psutil/py3/psutil/arch/windows/services.c
@@ -433,6 +433,7 @@ psutil_winservice_start(PyObject *self, PyObject *args) {
         goto error;
     }
 
+    CloseServiceHandle(hService);
     Py_RETURN_NONE;
 
 error:
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/socks.c b/contrib/python/psutil/py3/psutil/arch/windows/socks.c
index 5e4c2df802..0dc77f2d9d 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/socks.c
+++ b/contrib/python/psutil/py3/psutil/arch/windows/socks.c
@@ -12,7 +12,7 @@
 #include <ws2tcpip.h>
 
 #include "../../_psutil_common.h"
-#include "process_utils.h"
+#include "proc_utils.h"
 
 
 #define BYTESWAP_USHORT(x) ((((USHORT)(x) << 8) | ((USHORT)(x) >> 8)) & 0xffff)
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/sys.c b/contrib/python/psutil/py3/psutil/arch/windows/sys.c
new file mode 100644
index 0000000000..3e12e71b72
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/windows/sys.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+System related functions. Original code moved in here from
+psutil/_psutil_windows.c in 2023. For reference, here's the GIT blame
+history before the move:
+
+* boot_time(): https://github.com/giampaolo/psutil/blame/efd7ed3/psutil/_psutil_windows.c#L51-L60
+* users(): https://github.com/giampaolo/psutil/blame/efd7ed3/psutil/_psutil_windows.c#L1103-L1244
+*/
+
+#include <Python.h>
+#include <windows.h>
+
+#include "ntextapi.h"
+#include "../../_psutil_common.h"
+
+
+// Return a Python float representing the system uptime expressed in
+// seconds since the epoch.
+PyObject *
+psutil_boot_time(PyObject *self, PyObject *args) {
+    ULONGLONG upTime;
+    FILETIME fileTime;
+
+    GetSystemTimeAsFileTime(&fileTime);
+    // Number of milliseconds that have elapsed since the system was started.
+    upTime = GetTickCount64() / 1000ull;
+    return Py_BuildValue("d", psutil_FiletimeToUnixTime(fileTime) - upTime);
+}
+
+
+PyObject *
+psutil_users(PyObject *self, PyObject *args) {
+    HANDLE hServer = WTS_CURRENT_SERVER_HANDLE;
+    LPWSTR buffer_user = NULL;
+    LPWSTR buffer_addr = NULL;
+    LPWSTR buffer_info = NULL;
+    PWTS_SESSION_INFOW sessions = NULL;
+    DWORD count;
+    DWORD i;
+    DWORD sessionId;
+    DWORD bytes;
+    PWTS_CLIENT_ADDRESS address;
+    char address_str[50];
+    PWTSINFOW wts_info;
+    PyObject *py_tuple = NULL;
+    PyObject *py_address = NULL;
+    PyObject *py_username = NULL;
+    PyObject *py_retlist = PyList_New(0);
+
+    if (py_retlist == NULL)
+        return NULL;
+
+    if (WTSEnumerateSessionsW == NULL ||
+        WTSQuerySessionInformationW == NULL ||
+        WTSFreeMemory == NULL) {
+            // If we don't run in an environment that is a Remote Desktop Services environment
+            // the Wtsapi32 proc might not be present.
+            // https://docs.microsoft.com/en-us/windows/win32/termserv/run-time-linking-to-wtsapi32-dll
+            return py_retlist;
+    }
+
+    if (WTSEnumerateSessionsW(hServer, 0, 1, &sessions, &count) == 0) {
+        if (ERROR_CALL_NOT_IMPLEMENTED == GetLastError()) {
+            // On Windows Nano server, the Wtsapi32 API can be present, but return WinError 120.
+            return py_retlist;
+        }
+        PyErr_SetFromOSErrnoWithSyscall("WTSEnumerateSessionsW");
+        goto error;
+    }
+
+    for (i = 0; i < count; i++) {
+        py_address = NULL;
+        py_tuple = NULL;
+        sessionId = sessions[i].SessionId;
+        if (buffer_user != NULL)
+            WTSFreeMemory(buffer_user);
+        if (buffer_addr != NULL)
+            WTSFreeMemory(buffer_addr);
+        if (buffer_info != NULL)
+            WTSFreeMemory(buffer_info);
+
+        buffer_user = NULL;
+        buffer_addr = NULL;
+        buffer_info = NULL;
+
+        // username
+        bytes = 0;
+        if (WTSQuerySessionInformationW(hServer, sessionId, WTSUserName,
+                                        &buffer_user, &bytes) == 0) {
+            PyErr_SetFromOSErrnoWithSyscall("WTSQuerySessionInformationW");
+            goto error;
+        }
+        if (bytes <= 2)
+            continue;
+
+        // address
+        bytes = 0;
+        if (WTSQuerySessionInformationW(hServer, sessionId, WTSClientAddress,
+                                        &buffer_addr, &bytes) == 0) {
+            PyErr_SetFromOSErrnoWithSyscall("WTSQuerySessionInformationW");
+            goto error;
+        }
+
+        address = (PWTS_CLIENT_ADDRESS)buffer_addr;
+        if (address->AddressFamily == 2) {  // AF_INET == 2
+            sprintf_s(address_str,
+                      _countof(address_str),
+                      "%u.%u.%u.%u",
+                      // The IP address is offset by two bytes from the start of the Address member of the WTS_CLIENT_ADDRESS structure.
+                      address->Address[2],
+                      address->Address[3],
+                      address->Address[4],
+                      address->Address[5]);
+            py_address = Py_BuildValue("s", address_str);
+            if (!py_address)
+                goto error;
+        }
+        else {
+            Py_INCREF(Py_None);
+            py_address = Py_None;
+        }
+
+        // login time
+        bytes = 0;
+        if (WTSQuerySessionInformationW(hServer, sessionId, WTSSessionInfo,
+                                        &buffer_info, &bytes) == 0) {
+            PyErr_SetFromOSErrnoWithSyscall("WTSQuerySessionInformationW");
+            goto error;
+        }
+        wts_info = (PWTSINFOW)buffer_info;
+
+        py_username = PyUnicode_FromWideChar(buffer_user, wcslen(buffer_user));
+        if (py_username == NULL)
+            goto error;
+
+        py_tuple = Py_BuildValue(
+            "OOd",
+            py_username,
+            py_address,
+            psutil_LargeIntegerToUnixTime(wts_info->ConnectTime)
+        );
+        if (!py_tuple)
+            goto error;
+        if (PyList_Append(py_retlist, py_tuple))
+            goto error;
+        Py_CLEAR(py_username);
+        Py_CLEAR(py_address);
+        Py_CLEAR(py_tuple);
+    }
+
+    WTSFreeMemory(sessions);
+    WTSFreeMemory(buffer_user);
+    WTSFreeMemory(buffer_addr);
+    WTSFreeMemory(buffer_info);
+    return py_retlist;
+
+error:
+    Py_XDECREF(py_username);
+    Py_XDECREF(py_tuple);
+    Py_XDECREF(py_address);
+    Py_DECREF(py_retlist);
+
+    if (sessions != NULL)
+        WTSFreeMemory(sessions);
+    if (buffer_user != NULL)
+        WTSFreeMemory(buffer_user);
+    if (buffer_addr != NULL)
+        WTSFreeMemory(buffer_addr);
+    if (buffer_info != NULL)
+        WTSFreeMemory(buffer_info);
+    return NULL;
+}
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/sys.h b/contrib/python/psutil/py3/psutil/arch/windows/sys.h
new file mode 100644
index 0000000000..344ca21d42
--- /dev/null
+++ b/contrib/python/psutil/py3/psutil/arch/windows/sys.h
@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <Python.h>
+
+PyObject *psutil_boot_time(PyObject *self, PyObject *args);
+PyObject *psutil_users(PyObject *self, PyObject *args);
diff --git a/contrib/python/psutil/py3/psutil/arch/windows/wmi.c b/contrib/python/psutil/py3/psutil/arch/windows/wmi.c
index f9a847d3bf..fc7a66529e 100644
--- a/contrib/python/psutil/py3/psutil/arch/windows/wmi.c
+++ b/contrib/python/psutil/py3/psutil/arch/windows/wmi.c
@@ -64,22 +64,31 @@ psutil_init_loadavg_counter(PyObject *self, PyObject *args) {
     HANDLE event;
     HANDLE waitHandle;
 
-    if ((PdhOpenQueryW(NULL, 0, &hQuery)) != ERROR_SUCCESS)
-        goto error;
+    if ((PdhOpenQueryW(NULL, 0, &hQuery)) != ERROR_SUCCESS) {
+        PyErr_Format(PyExc_RuntimeError, "PdhOpenQueryW failed");
+        return NULL;
+    }
 
     s = PdhAddEnglishCounterW(hQuery, szCounterPath, 0, &hCounter);
-    if (s != ERROR_SUCCESS)
-        goto error;
+    if (s != ERROR_SUCCESS) {
+        PyErr_Format(
+            PyExc_RuntimeError,
+            "PdhAddEnglishCounterW failed. Performance counters may be disabled."
+        );
+        return NULL;
+    }
 
     event = CreateEventW(NULL, FALSE, FALSE, L"LoadUpdateEvent");
     if (event == NULL) {
-        PyErr_SetFromWindowsErr(0);
+        PyErr_SetFromOSErrnoWithSyscall("CreateEventW");
         return NULL;
     }
 
     s = PdhCollectQueryDataEx(hQuery, SAMPLING_INTERVAL, event);
-    if (s != ERROR_SUCCESS)
-        goto error;
+    if (s != ERROR_SUCCESS) {
+        PyErr_Format(PyExc_RuntimeError, "PdhCollectQueryDataEx failed");
+        return NULL;
+    }
 
     ret = RegisterWaitForSingleObject(
         &waitHandle,
@@ -91,15 +100,11 @@ psutil_init_loadavg_counter(PyObject *self, PyObject *args) {
         WT_EXECUTEDEFAULT);
 
     if (ret == 0) {
-        PyErr_SetFromWindowsErr(0);
+        PyErr_SetFromOSErrnoWithSyscall("RegisterWaitForSingleObject");
         return NULL;
     }
 
     Py_RETURN_NONE;
-
-error:
-    PyErr_SetFromWindowsErr(0);
-    return NULL;
 }
 
 
diff --git a/contrib/python/psutil/py3/ya.make b/contrib/python/psutil/py3/ya.make
index 16c79983b7..5ae4714a6a 100644
--- a/contrib/python/psutil/py3/ya.make
+++ b/contrib/python/psutil/py3/ya.make
@@ -1,6 +1,6 @@
 PY3_LIBRARY()
 
-VERSION(5.8.0)
+VERSION(5.9.8)
 
 LICENSE(BSD-3-Clause)
 
@@ -24,7 +24,7 @@ NO_CHECK_IMPORTS(
 NO_UTIL()
 
 CFLAGS(
-    -DPSUTIL_VERSION=580
+    -DPSUTIL_VERSION=598
 )
 
 SRCS(
@@ -40,6 +40,11 @@ IF (OS_LINUX)
     SRCS(
         psutil/_psutil_linux.c
         psutil/_psutil_posix.c
+        psutil/arch/linux/disk.c
+        psutil/arch/linux/mem.c
+        psutil/arch/linux/net.c
+        psutil/arch/linux/proc.c
+        psutil/arch/linux/users.c
     )
 
     PY_REGISTER(
@@ -62,7 +67,13 @@ IF (OS_DARWIN)
     SRCS(
         psutil/_psutil_osx.c
         psutil/_psutil_posix.c
-        psutil/arch/osx/process_info.c
+        psutil/arch/osx/cpu.c
+        psutil/arch/osx/disk.c
+        psutil/arch/osx/mem.c
+        psutil/arch/osx/net.c
+        psutil/arch/osx/proc.c
+        psutil/arch/osx/sensors.c
+        psutil/arch/osx/sys.c
     )
 
     PY_REGISTER(
@@ -88,13 +99,17 @@ IF (OS_WINDOWS)
         psutil/_psutil_windows.c
         psutil/arch/windows/cpu.c
         psutil/arch/windows/disk.c
+        psutil/arch/windows/mem.c
         psutil/arch/windows/net.c
-        psutil/arch/windows/process_handles.c
-        psutil/arch/windows/process_info.c
-        psutil/arch/windows/process_utils.c
+        psutil/arch/windows/proc.c
+        psutil/arch/windows/proc_handles.c
+        psutil/arch/windows/proc_info.c
+        psutil/arch/windows/proc_utils.c
         psutil/arch/windows/security.c
+        psutil/arch/windows/sensors.c
         psutil/arch/windows/services.c
         psutil/arch/windows/socks.c
+        psutil/arch/windows/sys.c
         psutil/arch/windows/wmi.c
     )
 
diff --git a/ya b/ya
index 96c1fc2354..55a03de605 100755
--- a/ya
+++ b/ya
@@ -23,6 +23,11 @@ exit 2
 import os
 import sys
 import platform
+import time
+
+def add_stage_start_to_environ(stage_name):
+    stages = os.environ.get('YA_STAGES', '')
+    os.environ['YA_STAGES'] = stages + (':' if stages else '') + '{}@{}'.format(stage_name, time.time())
 
 RETRIES = 5
 HASH_PREFIX = 10
@@ -66,6 +71,7 @@ PLATFORM_MAP = {
     }
 } # End of mapping
 
+add_stage_start_to_environ('ya-script-initialization')
 
 def create_dirs(path):
     try:
@@ -158,6 +164,8 @@ def _fetch(url, into):
 
     _tune_ssl()
 
+    add_stage_start_to_environ('ya-script-download')
+
     from urllib.request import urlopen
     from urllib.request import Request
     from urllib.parse import urlparse
@@ -240,8 +248,6 @@ def _get(urls, md5):
                 if iter + 1 == RETRIES:
                     raise
                 else:
-                    import time
-
                     time.sleep(iter)
 
     return dest_path
@@ -260,6 +266,8 @@ def _get_dir(urls, md5, ya_name):
             return dest_dir
         raise
 
+    add_stage_start_to_environ('ya-script-extract')
+
     tmp_dir = dest_dir + '.' + uniq()
     try:
         try:
@@ -325,6 +333,7 @@ def main():
 
     ya_name = {'win32': 'ya-bin.exe', 'win32-clang-cl': 'ya-bin.exe'}.get(best_key, 'ya-bin')  # XXX
     ya_dir = _get_dir(value['urls'], value['md5'], ya_name)
+    add_stage_start_to_environ('ya-script-prepare')
 
     # Popen `args` must have `str` type
     ya_path = str(os.path.join(ya_dir, ya_name))
diff --git a/yt/yt/core/bus/tcp/client.cpp b/yt/yt/core/bus/tcp/client.cpp
index 770375ddfe..6fe8a08856 100644
--- a/yt/yt/core/bus/tcp/client.cpp
+++ b/yt/yt/core/bus/tcp/client.cpp
@@ -141,11 +141,9 @@ class TTcpBusClient
 public:
     TTcpBusClient(
         TBusClientConfigPtr config,
-        IPacketTranscoderFactory* packetTranscoderFactory,
-        IMemoryUsageTrackerPtr memoryUsageTracker)
+        IPacketTranscoderFactory* packetTranscoderFactory)
         : Config_(std::move(config))
         , PacketTranscoderFactory_(packetTranscoderFactory)
-        , MemoryUsageTracker_(std::move(memoryUsageTracker))
     {
         if (Config_->Address) {
             EndpointDescription_ = *Config_->Address;
@@ -206,8 +204,7 @@ public:
             Config_->UnixDomainSocketPath,
             std::move(handler),
             std::move(poller),
-            PacketTranscoderFactory_,
-            MemoryUsageTracker_);
+            PacketTranscoderFactory_);
         connection->Start();
 
         return New<TTcpClientBusProxy>(std::move(connection));
@@ -218,8 +215,6 @@ private:
 
     IPacketTranscoderFactory* const PacketTranscoderFactory_;
 
-    const IMemoryUsageTrackerPtr MemoryUsageTracker_;
-
     TString EndpointDescription_;
     IAttributeDictionaryPtr EndpointAttributes_;
 };
@@ -228,13 +223,9 @@ private:
 
 IBusClientPtr CreateBusClient(
     TBusClientConfigPtr config,
-    IPacketTranscoderFactory* packetTranscoderFactory,
-    IMemoryUsageTrackerPtr memoryUsageTracker)
+    IPacketTranscoderFactory* packetTranscoderFactory)
 {
-    return New<TTcpBusClient>(
-        std::move(config),
-        packetTranscoderFactory,
-        std::move(memoryUsageTracker));
+    return New<TTcpBusClient>(std::move(config), packetTranscoderFactory);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/yt/yt/core/bus/tcp/client.h b/yt/yt/core/bus/tcp/client.h
index bebb0b3209..5b38dd1d51 100644
--- a/yt/yt/core/bus/tcp/client.h
+++ b/yt/yt/core/bus/tcp/client.h
@@ -11,8 +11,7 @@ namespace NYT::NBus {
 //! Initializes a new client for communicating with a given address.
 IBusClientPtr CreateBusClient(
     TBusClientConfigPtr config,
-    IPacketTranscoderFactory* packetTranscoderFactory = GetYTPacketTranscoderFactory(),
-    IMemoryUsageTrackerPtr memoryUsageTracker = nullptr);
+    IPacketTranscoderFactory* packetTranscoderFactory = GetYTPacketTranscoderFactory());
 
 ////////////////////////////////////////////////////////////////////////////////
 
diff --git a/yt/yt/core/bus/tcp/connection.cpp b/yt/yt/core/bus/tcp/connection.cpp
index 8fd3321ab5..07904d9fbe 100644
--- a/yt/yt/core/bus/tcp/connection.cpp
+++ b/yt/yt/core/bus/tcp/connection.cpp
@@ -97,50 +97,6 @@ void TTcpConnection::TPacket::EnableCancel(TTcpConnectionPtr connection)
 
 ////////////////////////////////////////////////////////////////////////////////
 
-TTcpConnection::TBlobWithMemoryUsageGuard::TBlobWithMemoryUsageGuard(
-    TBlob&& blob,
-    TMemoryUsageTrackerGuard&& guard)
-    : Blob_(std::move(blob))
-    , Guard_(std::move(guard))
-{ }
-
-char* TTcpConnection::TBlobWithMemoryUsageGuard::Begin()
-{
-    return Blob_.Begin();
-}
-
-char* TTcpConnection::TBlobWithMemoryUsageGuard::End()
-{
-    return Blob_.End();
-}
-
-size_t TTcpConnection::TBlobWithMemoryUsageGuard::Capacity()
-{
-    return Blob_.Capacity();
-}
-
-i64 TTcpConnection::TBlobWithMemoryUsageGuard::Size()
-{
-    return Blob_.Size();
-}
-
-void TTcpConnection::TBlobWithMemoryUsageGuard::Append(TRef ref)
-{
-    Blob_.Append(ref);
-}
-
-void TTcpConnection::TBlobWithMemoryUsageGuard::Clear()
-{
-    Blob_.Clear();
-}
-
-void TTcpConnection::TBlobWithMemoryUsageGuard::Reserve(i64 size)
-{
-    Blob_.Reserve(size);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-
 TTcpConnection::TTcpConnection(
     TBusConfigPtr config,
     EConnectionType connectionType,
@@ -154,8 +110,7 @@ TTcpConnection::TTcpConnection(
     const std::optional<TString>& unixDomainSocketPath,
     IMessageHandlerPtr handler,
     IPollerPtr poller,
-    IPacketTranscoderFactory* packetTranscoderFactory,
-    IMemoryUsageTrackerPtr memoryUsageTracker)
+    IPacketTranscoderFactory* packetTranscoderFactory)
     : Config_(std::move(config))
     , ConnectionType_(connectionType)
     , Id_(id)
@@ -182,7 +137,6 @@ TTcpConnection::TTcpConnection(
     , WriteStallTimeout_(NProfiling::DurationToCpuDuration(Config_->WriteStallTimeout))
     , EncryptionMode_(Config_->EncryptionMode)
     , VerificationMode_(Config_->VerificationMode)
-    , MemoryUsageTracker_(std::move(memoryUsageTracker))
 { }
 
 TTcpConnection::~TTcpConnection()
@@ -257,14 +211,7 @@ void TTcpConnection::Start()
     }
 
     TTcpDispatcher::TImpl::Get()->RegisterConnection(this);
-
-    auto result = InitBuffers();
-
-    if (!result.IsOK()) {
-        YT_LOG_ERROR(result, "I/O buffers allocation error");
-        Abort(TError(NBus::EErrorCode::TransportError, "I/O buffers allocation error"));
-        return;
-    }
+    InitBuffers();
 
     switch (ConnectionType_) {
         case EConnectionType::Client:
@@ -601,34 +548,12 @@ bool TTcpConnection::AbortIfNetworkingDisabled()
     return true;
 }
 
-TError TTcpConnection::InitBuffers()
+void TTcpConnection::InitBuffers()
 {
-    auto readBufferGuardOrError = MemoryUsageTracker_
-        ? TMemoryUsageTrackerGuard::TryAcquire(MemoryUsageTracker_, ReadBufferSize)
-        : TMemoryUsageTrackerGuard();
-    auto writeBufferGuardOrError = MemoryUsageTracker_
-        ? TMemoryUsageTrackerGuard::TryAcquire(MemoryUsageTracker_, WriteBufferSize)
-        : TMemoryUsageTrackerGuard();
+    ReadBuffer_ = TBlob(GetRefCountedTypeCookie<TTcpConnectionReadBufferTag>(), ReadBufferSize, /*initializeStorage*/ false);
 
-    if (!readBufferGuardOrError.IsOK()) {
-        return readBufferGuardOrError.Wrap();
-    }
-
-    if (!writeBufferGuardOrError.IsOK()) {
-        return writeBufferGuardOrError.Wrap();
-    }
-
-    ReadBuffer_ = TBlobWithMemoryUsageGuard(
-        TBlob(GetRefCountedTypeCookie<TTcpConnectionReadBufferTag>(), ReadBufferSize, /*initializeStorage*/ false),
-        std::move(readBufferGuardOrError.Value())
-    );
-
-    WriteBuffers_.push_back(std::make_unique<TBlobWithMemoryUsageGuard>(
-        TBlob(GetRefCountedTypeCookie<TTcpConnectionWriteBufferTag>()),
-        std::move(writeBufferGuardOrError.Value())));
+    WriteBuffers_.push_back(std::make_unique<TBlob>(GetRefCountedTypeCookie<TTcpConnectionWriteBufferTag>()));
     WriteBuffers_[0]->Reserve(WriteBufferSize);
-
-    return TError();
 }
 
 int TTcpConnection::GetSocketPort()
@@ -1520,18 +1445,10 @@ bool TTcpConnection::MaybeEncodeFragments()
         if (buffer->Size() + fragment.Size() > buffer->Capacity()) {
             // Make sure we never reallocate.
             flushCoalesced();
-
-            auto writeBufferGuard = MemoryUsageTracker_
-                ? TMemoryUsageTrackerGuard::Acquire(MemoryUsageTracker_, WriteBufferSize)
-                : TMemoryUsageTrackerGuard();
-            WriteBuffers_.push_back(std::make_unique<TBlobWithMemoryUsageGuard>(
-                TBlob(GetRefCountedTypeCookie<TTcpConnectionWriteBufferTag>()),
-                std::move(writeBufferGuard)));
-
+            WriteBuffers_.push_back(std::make_unique<TBlob>(GetRefCountedTypeCookie<TTcpConnectionWriteBufferTag>()));
             buffer = WriteBuffers_.back().get();
             buffer->Reserve(std::max(WriteBufferSize, fragment.Size()));
         }
-
         buffer->Append(fragment);
         coalescedSize += fragment.Size();
     };
diff --git a/yt/yt/core/bus/tcp/connection.h b/yt/yt/core/bus/tcp/connection.h
index 37ac4a4ba9..0f5d758152 100644
--- a/yt/yt/core/bus/tcp/connection.h
+++ b/yt/yt/core/bus/tcp/connection.h
@@ -20,7 +20,6 @@
 #include <yt/yt/core/misc/mpsc_stack.h>
 #include <yt/yt/core/misc/ring_queue.h>
 #include <yt/yt/core/misc/atomic_ptr.h>
-#include <yt/yt/core/misc/memory_usage_tracker.h>
 
 #include <yt/yt/core/net/public.h>
 
@@ -87,8 +86,7 @@ public:
         const std::optional<TString>& unixDomainSocketPath,
         IMessageHandlerPtr handler,
         NConcurrency::IPollerPtr poller,
-        IPacketTranscoderFactory* packetTranscoderFactory,
-        IMemoryUsageTrackerPtr memoryUsageTracker);
+        IPacketTranscoderFactory* packetTranscoderFactory);
 
     ~TTcpConnection();
 
@@ -183,39 +181,6 @@ private:
         void EnableCancel(TTcpConnectionPtr connection);
     };
 
-    class TBlobWithMemoryUsageGuard {
-    public:
-        TBlobWithMemoryUsageGuard(
-            TBlob&& blob,
-            TMemoryUsageTrackerGuard&& guard);
-
-        TBlobWithMemoryUsageGuard() = default;
-        TBlobWithMemoryUsageGuard(const TBlobWithMemoryUsageGuard& other) = delete;
-        TBlobWithMemoryUsageGuard(TBlobWithMemoryUsageGuard&& other) = default;
-        ~TBlobWithMemoryUsageGuard() = default;
-
-        TBlobWithMemoryUsageGuard& operator=(const TBlobWithMemoryUsageGuard& other) = delete;
-        TBlobWithMemoryUsageGuard& operator=(TBlobWithMemoryUsageGuard&& other) = default;
-
-        char* Begin();
-
-        char* End();
-
-        size_t Capacity();
-
-        i64 Size();
-
-        void Append(TRef ref);
-
-        void Clear();
-
-        void Reserve(i64 size);
-
-    private:
-        TBlob Blob_;
-        TMemoryUsageTrackerGuard Guard_;
-    };
-
     using TPacketPtr = TIntrusivePtr<TPacket>;
 
     const TBusConfigPtr Config_;
@@ -274,7 +239,7 @@ private:
     std::unique_ptr<IPacketDecoder> Decoder_;
     const NProfiling::TCpuDuration ReadStallTimeout_;
     std::atomic<NProfiling::TCpuInstant> LastIncompleteReadTime_ = std::numeric_limits<NProfiling::TCpuInstant>::max();
-    TBlobWithMemoryUsageGuard ReadBuffer_;
+    TBlob ReadBuffer_;
 
     TRingQueue<TPacketPtr> QueuedPackets_;
     TRingQueue<TPacketPtr> EncodedPackets_;
@@ -283,7 +248,7 @@ private:
     std::unique_ptr<IPacketEncoder> Encoder_;
     const NProfiling::TCpuDuration WriteStallTimeout_;
     std::atomic<NProfiling::TCpuInstant> LastIncompleteWriteTime_ = std::numeric_limits<NProfiling::TCpuInstant>::max();
-    std::vector<std::unique_ptr<TBlobWithMemoryUsageGuard>> WriteBuffers_;
+    std::vector<std::unique_ptr<TBlob>> WriteBuffers_;
     TRingQueue<TRef> EncodedFragments_;
     TRingQueue<size_t> EncodedPacketSizes_;
 
@@ -312,8 +277,6 @@ private:
     const EEncryptionMode EncryptionMode_;
     const EVerificationMode VerificationMode_;
 
-    const IMemoryUsageTrackerPtr MemoryUsageTracker_;
-
     NYTree::IAttributeDictionaryPtr PeerAttributes_;
 
     size_t MaxFragmentsPerWrite_ = 256;
@@ -326,7 +289,7 @@ private:
     bool AbortIfNetworkingDisabled();
     void AbortSslSession();
 
-    TError InitBuffers();
+    void InitBuffers();
 
     int GetSocketPort();
 
diff --git a/yt/yt/core/bus/tcp/packet.cpp b/yt/yt/core/bus/tcp/packet.cpp
index bfd59be96d..a6cd02de4f 100644
--- a/yt/yt/core/bus/tcp/packet.cpp
+++ b/yt/yt/core/bus/tcp/packet.cpp
@@ -160,17 +160,13 @@ class TPacketDecoder
     , public TPacketTranscoderBase<TPacketDecoder>
 {
 public:
-    TPacketDecoder(
-        const NLogging::TLogger& logger,
-        bool verifyChecksum,
-        IMemoryUsageTrackerPtr memoryUsageTracker)
+    TPacketDecoder(const NLogging::TLogger& logger, bool verifyChecksum)
         : TPacketTranscoderBase(logger)
         , Allocator_(
             PacketDecoderChunkSize,
             TChunkedMemoryAllocator::DefaultMaxSmallBlockSizeRatio,
             GetRefCountedTypeCookie<TPacketDecoderTag>())
         , VerifyChecksum_(verifyChecksum)
-        , MemoryUsageTracker_(std::move(memoryUsageTracker))
     {
         Restart();
     }
@@ -205,7 +201,6 @@ public:
         Phase_ = EPacketPhase::FixedHeader;
         PacketSize_ = 0;
         Parts_.clear();
-        MemoryGuards_.clear();
         PartIndex_ = -1;
         Message_.Reset();
 
@@ -248,14 +243,11 @@ private:
     TChunkedMemoryAllocator Allocator_;
 
     std::vector<TSharedRef> Parts_;
-    std::vector<TMemoryUsageTrackerGuard> MemoryGuards_;
 
     size_t PacketSize_ = 0;
 
     const bool VerifyChecksum_;
 
-    const IMemoryUsageTrackerPtr MemoryUsageTracker_;
-
     bool EndFixedHeaderPhase()
     {
         if (FixedHeader_.Signature != PacketSignature) {
@@ -358,10 +350,6 @@ private:
             } else if (partSize == 0) {
                 Parts_.push_back(TSharedRef::MakeEmpty());
             } else {
-                if (MemoryUsageTracker_) {
-                    MemoryGuards_.push_back(TMemoryUsageTrackerGuard::Acquire(MemoryUsageTracker_, partSize));
-                }
-
                 auto part = Allocator_.AllocateAligned(partSize);
                 BeginPhase(EPacketPhase::MessagePart, part.Begin(), part.Size());
                 Parts_.push_back(std::move(part));
@@ -506,19 +494,14 @@ private:
 
 ////////////////////////////////////////////////////////////////////////////////
 
-class TPacketTranscoderFactory
+struct TPacketTranscoderFactory
     : public IPacketTranscoderFactory
 {
-public:
-    TPacketTranscoderFactory(IMemoryUsageTrackerPtr memoryUsageTracker)
-        : MemoryUsageTracker_(std::move(memoryUsageTracker))
-    { }
-
     std::unique_ptr<IPacketDecoder> CreateDecoder(
         const NLogging::TLogger& logger,
         bool verifyChecksum) const override
     {
-        return std::make_unique<TPacketDecoder>(logger, verifyChecksum, MemoryUsageTracker_);
+        return std::make_unique<TPacketDecoder>(logger, verifyChecksum);
     }
 
     std::unique_ptr<IPacketEncoder> CreateEncoder(
@@ -526,16 +509,13 @@ public:
     {
         return std::make_unique<TPacketEncoder>(logger);
     }
-
-private:
-    const IMemoryUsageTrackerPtr MemoryUsageTracker_;
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 
-IPacketTranscoderFactory* GetYTPacketTranscoderFactory(IMemoryUsageTrackerPtr memoryUsageTracker)
+IPacketTranscoderFactory* GetYTPacketTranscoderFactory()
 {
-    return LeakySingleton<TPacketTranscoderFactory>(std::move(memoryUsageTracker));
+    return LeakySingleton<TPacketTranscoderFactory>();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/yt/yt/core/bus/tcp/packet.h b/yt/yt/core/bus/tcp/packet.h
index 8182fbae40..05e4693128 100644
--- a/yt/yt/core/bus/tcp/packet.h
+++ b/yt/yt/core/bus/tcp/packet.h
@@ -2,8 +2,6 @@
 
 #include "private.h"
 
-#include <yt/yt/core/misc/memory_usage_tracker.h>
-
 namespace NYT::NBus {
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -78,7 +76,7 @@ struct IPacketTranscoderFactory
 
 ////////////////////////////////////////////////////////////////////////////////
 
-IPacketTranscoderFactory* GetYTPacketTranscoderFactory(IMemoryUsageTrackerPtr memoryUsageTracker = nullptr);
+IPacketTranscoderFactory* GetYTPacketTranscoderFactory();
 
 ////////////////////////////////////////////////////////////////////////////////
 
diff --git a/yt/yt/core/bus/tcp/server.cpp b/yt/yt/core/bus/tcp/server.cpp
index ddc15d7889..aa46ee9068 100644
--- a/yt/yt/core/bus/tcp/server.cpp
+++ b/yt/yt/core/bus/tcp/server.cpp
@@ -43,13 +43,11 @@ public:
         TBusServerConfigPtr config,
         IPollerPtr poller,
         IMessageHandlerPtr handler,
-        IPacketTranscoderFactory* packetTranscoderFactory,
-        IMemoryUsageTrackerPtr memoryUsageTracker)
+        IPacketTranscoderFactory* packetTranscoderFactory)
         : Config_(std::move(config))
         , Poller_(std::move(poller))
         , Handler_(std::move(handler))
         , PacketTranscoderFactory_(std::move(packetTranscoderFactory))
-        , MemoryUsageTracker_(std::move(memoryUsageTracker))
     {
         YT_VERIFY(Config_);
         YT_VERIFY(Poller_);
@@ -125,8 +123,6 @@ protected:
 
     IPacketTranscoderFactory* const PacketTranscoderFactory_;
 
-    const IMemoryUsageTrackerPtr MemoryUsageTracker_;
-
     YT_DECLARE_SPIN_LOCK(NThreading::TSpinLock, ControlSpinLock_);
     SOCKET ServerSocket_ = INVALID_SOCKET;
 
@@ -257,8 +253,7 @@ protected:
                 std::nullopt,
                 Handler_,
                 std::move(poller),
-                PacketTranscoderFactory_,
-                MemoryUsageTracker_);
+                PacketTranscoderFactory_);
 
             {
                 auto guard = WriterGuard(ConnectionsSpinLock_);
@@ -352,14 +347,12 @@ public:
         TBusServerConfigPtr config,
         IPollerPtr poller,
         IMessageHandlerPtr handler,
-        IPacketTranscoderFactory* packetTranscoderFactory,
-        IMemoryUsageTrackerPtr memoryUsageTracker)
+        IPacketTranscoderFactory* packetTranscoderFactory)
         : TTcpBusServerBase(
             std::move(config),
             std::move(poller),
             std::move(handler),
-            packetTranscoderFactory,
-            std::move(memoryUsageTracker))
+            packetTranscoderFactory)
     { }
 
 private:
@@ -397,11 +390,9 @@ class TTcpBusServerProxy
 public:
     explicit TTcpBusServerProxy(
         TBusServerConfigPtr config,
-        IPacketTranscoderFactory* packetTranscoderFactory,
-        IMemoryUsageTrackerPtr memoryUsageTracker)
+        IPacketTranscoderFactory* packetTranscoderFactory)
         : Config_(std::move(config))
         , PacketTranscoderFactory_(packetTranscoderFactory)
-        , MemoryUsageTracker_(std::move(memoryUsageTracker))
     {
         YT_VERIFY(Config_);
     }
@@ -417,8 +408,7 @@ public:
             Config_,
             TTcpDispatcher::TImpl::Get()->GetAcceptorPoller(),
             std::move(handler),
-            PacketTranscoderFactory_,
-            MemoryUsageTracker_);
+            PacketTranscoderFactory_);
 
         Server_.Store(server);
         server->Start();
@@ -438,8 +428,6 @@ private:
 
     IPacketTranscoderFactory* const PacketTranscoderFactory_;
 
-    const IMemoryUsageTrackerPtr MemoryUsageTracker_;
-
     TAtomicIntrusivePtr<TServer> Server_;
 };
 
@@ -479,8 +467,7 @@ private:
 
 IBusServerPtr CreateBusServer(
     TBusServerConfigPtr config,
-    IPacketTranscoderFactory* packetTranscoderFactory,
-    IMemoryUsageTrackerPtr memoryUsageTracker)
+    IPacketTranscoderFactory* packetTranscoderFactory)
 {
     std::vector<IBusServerPtr> servers;
 
@@ -488,16 +475,14 @@ IBusServerPtr CreateBusServer(
         servers.push_back(
             New<TTcpBusServerProxy<TRemoteTcpBusServer>>(
                 config,
-                packetTranscoderFactory,
-                memoryUsageTracker));
+                packetTranscoderFactory));
     }
 #ifdef _linux_
     // Abstract unix sockets are supported only on Linux.
     servers.push_back(
         New<TTcpBusServerProxy<TLocalTcpBusServer>>(
             config,
-            packetTranscoderFactory,
-            memoryUsageTracker));
+            packetTranscoderFactory));
 #endif
 
     return New<TCompositeBusServer>(std::move(servers));
diff --git a/yt/yt/core/bus/tcp/server.h b/yt/yt/core/bus/tcp/server.h
index e50ce5320b..7dcb351e10 100644
--- a/yt/yt/core/bus/tcp/server.h
+++ b/yt/yt/core/bus/tcp/server.h
@@ -10,8 +10,7 @@ namespace NYT::NBus {
 
 IBusServerPtr CreateBusServer(
     TBusServerConfigPtr config,
-    IPacketTranscoderFactory* packetTranscoderFactory = GetYTPacketTranscoderFactory(),
-    IMemoryUsageTrackerPtr memoryUsageTracker = nullptr);
+    IPacketTranscoderFactory* packetTranscoderFactory = GetYTPacketTranscoderFactory());
 
 ////////////////////////////////////////////////////////////////////////////////