ydb/library, branch mainMirror of YDB github reposhttps://code.mastervirt.ru/ydb/atom?h=main2026-06-07T01:33:59ZSync branches 260607-01312026-06-07T01:33:59ZYDBotydbot@ydb.tech2026-06-07T01:33:59Zurn:sha1:1d40c26682b2481f3c9daca25b82f8aa18d99281New version of the tld SKIP_CHECK SKIP_REVIEW2026-06-06T23:26:51Zrobot-ratatoskrobot-ratatosk@yandex-team.com2026-06-06T22:54:09Zurn:sha1:7e7a9bdcd5ab83a88fd31c74e70b2347a54ac275
commit_hash:91a2de31f763fca2eb5b8595deb369458d889731
Stroka -> TString, Wtroka -> TUtf16String..2026-06-06T22:57:56Zakhropovakhropov@yandex-team.com2026-06-06T22:19:15Zurn:sha1:19371c4e76c71936ceba67c5113e5b4421e7b922
commit_hash:0f92ee40eb5e4a80c59a5cbdcac895ff7acd22e9
YT-22593: Reduce TString usage in core/misc2026-06-06T22:31:50Zbabenkobabenko@yandex-team.com2026-06-06T22:15:06Zurn:sha1:ffc038d5a916cec181915795ca4b45f07ee2ae05
commit_hash:ba8c42476d6274212745348071682042e780037f
Cache process/thread id getters and use them in TError origin capture2026-06-06T21:16:49Zbabenkobabenko@yandex-team.com2026-06-06T20:52:00Zurn:sha1:f10c7206fb31af8057446bceef9707aabaa9456e
## Motivation
Profiling the YT master Automaton thread showed TOriginAttributes::Capture (run on every non-OK TError) spending ~60% of its time in a getpid() syscall — uncached on glibc >= 2.25. NYT::GetCurrentThreadId() (gettid) feeds hot thread-affinity / log-manager checks on the same thread.
## Changes
- New library/cpp/yt/system/process_id.* with cached GetProcessId(); GetSystemThreadId() now caches the kernel tid in TLS. Both caches reset in the child after fork.
- Moved thread_name.{h,cpp} from misc to system.
- Removed GetCurrentProcessId/GetCurrentThreadId shims from yt/yt/core/misc/proc.{h,cpp}; migrated all callers to NYT::GetProcessId / NYT::GetSystemThreadId.
- TOriginAttributes::Capture uses the cached getters; recorded Tid is now the real kernel tid (matches perf/ps).
- Added microbenchmarks (library/cpp/yt/system/benchmarks, yt/yt/core/benchmarks/error.cpp).
## Microbenchmarks (release)
| | before | after |
|---|---|---|
| getpid | 101 ns | 0.33 ns |
| gettid | 102 ns | 1.64 ns |
| Capture | 161 ns | 50 ns |
| failed TError | 221 ns | 74 ns |
commit_hash:ee37ae57d61a5a2dd33daee935270f4bb93b7ff9
Sync branches 260605-01282026-06-05T01:30:29ZYDBotydbot@ydb.tech2026-06-05T01:30:29Zurn:sha1:027b2c1ab96f197b9b4e9ea09d6a915257814f01[library] Trim dump_clang_coverage2026-06-04T17:50:02Zslizyukalexslizyukalex@yandex-team.com2026-06-04T17:03:22Zurn:sha1:073ad2ac124df7257f1c17304d6cc1483bb4bfb4
`YA_COVERAGE_DUMP_PROFILE_AND_EXIT` is not used anymore
commit_hash:c7158fb4e201d522e6e2c31c91fa9361af4bf50c
Sync branches 260604-09442026-06-04T09:46:48ZYDBotydbot@ydb.tech2026-06-04T09:46:48Zurn:sha1:db5b90517207ed5f41d196b5ac1f40863486503dNew version of the tld SKIP_CHECK SKIP_REVIEW2026-06-04T06:35:28Zrobot-ratatoskrobot-ratatosk@yandex-team.com2026-06-04T06:13:32Zurn:sha1:c34e3d27b414a62bff889a5ed90b735f352f75d9
commit_hash:5cd17c6fa69e4f6a18eb72ebb05a874491ae8ac7
Sync branches 260604-01382026-06-04T01:40:42ZYDBotydbot@ydb.tech2026-06-04T01:40:42Zurn:sha1:257bf799b632de8db40b19b6bbdbaea9e5a38120