1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
#if defined(OS_LINUX) || defined(OS_FREEBSD)
#include <sys/types.h>
#include <sys/stat.h>
#if defined(OS_FREEBSD)
#include <sys/sysctl.h>
#include <sys/user.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#include <cassert>
#include "MemoryStatisticsOS.h"
#include <Common/logger_useful.h>
#include <base/getPageSize.h>
#include <Common/Exception.h>
#include <IO/ReadBufferFromMemory.h>
#include <IO/ReadHelpers.h>
namespace DB
{
#if defined(OS_LINUX)
namespace ErrorCodes
{
extern const int FILE_DOESNT_EXIST;
extern const int CANNOT_OPEN_FILE;
extern const int CANNOT_READ_FROM_FILE_DESCRIPTOR;
extern const int CANNOT_CLOSE_FILE;
}
static constexpr auto filename = "/proc/self/statm";
MemoryStatisticsOS::MemoryStatisticsOS()
{
fd = ::open(filename, O_RDONLY | O_CLOEXEC);
if (-1 == fd)
throwFromErrno("Cannot open file " + std::string(filename), errno == ENOENT ? ErrorCodes::FILE_DOESNT_EXIST : ErrorCodes::CANNOT_OPEN_FILE);
}
MemoryStatisticsOS::~MemoryStatisticsOS()
{
if (0 != ::close(fd))
{
try
{
throwFromErrno(
"File descriptor for \"" + std::string(filename) + "\" could not be closed. "
"Something seems to have gone wrong. Inspect errno.", ErrorCodes::CANNOT_CLOSE_FILE);
}
catch (const ErrnoException &)
{
DB::tryLogCurrentException(__PRETTY_FUNCTION__);
}
}
}
MemoryStatisticsOS::Data MemoryStatisticsOS::get() const
{
Data data;
constexpr size_t buf_size = 1024;
char buf[buf_size];
ssize_t res = 0;
do
{
res = ::pread(fd, buf, buf_size, 0);
if (-1 == res)
{
if (errno == EINTR)
continue;
throwFromErrno("Cannot read from file " + std::string(filename), ErrorCodes::CANNOT_READ_FROM_FILE_DESCRIPTOR);
}
assert(res >= 0);
break;
} while (true);
ReadBufferFromMemory in(buf, res);
uint64_t unused;
readIntText(data.virt, in);
skipWhitespaceIfAny(in);
readIntText(data.resident, in);
skipWhitespaceIfAny(in);
readIntText(data.shared, in);
skipWhitespaceIfAny(in);
readIntText(data.code, in);
skipWhitespaceIfAny(in);
readIntText(unused, in);
skipWhitespaceIfAny(in);
readIntText(data.data_and_stack, in);
size_t page_size = static_cast<size_t>(::getPageSize());
data.virt *= page_size;
data.resident *= page_size;
data.shared *= page_size;
data.code *= page_size;
data.data_and_stack *= page_size;
return data;
}
#endif
#if defined(OS_FREEBSD)
namespace ErrorCodes
{
extern const int SYSTEM_ERROR;
}
MemoryStatisticsOS::MemoryStatisticsOS()
{
pagesize = static_cast<size_t>(::getPageSize());
self = ::getpid();
}
MemoryStatisticsOS::~MemoryStatisticsOS()
{
}
MemoryStatisticsOS::Data MemoryStatisticsOS::get() const
{
Data data;
int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, self };
struct kinfo_proc kp;
size_t len = sizeof(struct kinfo_proc);
if (-1 == ::sysctl(mib, 4, &kp, &len, nullptr, 0))
throwFromErrno("Cannot sysctl(kern.proc.pid." + std::to_string(self) + ")", ErrorCodes::SYSTEM_ERROR);
if (sizeof(struct kinfo_proc) != len)
throw DB::Exception(DB::ErrorCodes::SYSTEM_ERROR, "Kernel returns structure of {} bytes instead of expected {}",
len, sizeof(struct kinfo_proc));
if (sizeof(struct kinfo_proc) != kp.ki_structsize)
throw DB::Exception(DB::ErrorCodes::SYSTEM_ERROR, "Kernel structure size ({}) does not match expected ({}).",
kp.ki_structsize, sizeof(struct kinfo_proc));
data.virt = kp.ki_size;
data.resident = kp.ki_rssize * pagesize;
data.code = kp.ki_tsize * pagesize;
data.data_and_stack = (kp.ki_dsize + kp.ki_ssize) * pagesize;
return data;
}
#endif
}
#endif
|
