ydb/library/cpp/yt/error, branch mainMirror of YDB github reposhttps://code.mastervirt.ru/ydb/atom?h=main2026-06-06T22:31:50ZYT-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
YT-26105: Make TError aware of ::TSystemError2026-05-25T08:19:52Zdann239dann239@yandex-team.com2026-05-25T07:58:24Zurn:sha1:b98aa1ad6a725444af35a0070e6dea6f2114f8d3
commit_hash:ca6efe06865fe9fc9ebfd5ca8bbd79c2acbb4ff3
YT: Add missing 16bit types to TErrorAttribute conversions2026-04-30T12:18:42Zdgoleardgolear@yandex-team.com2026-04-30T11:50:22Zurn:sha1:ff286f36b5f9efa572d1fecc8bed6ea553614716
commit_hash:7e973890af2061e2a78b34d31c404f000375a88b
Use implicit bool conversion for null check in origin_attributes.cpp2026-04-27T13:12:31Zbabenkobabenko@yandex-team.com2026-04-27T12:52:34Zurn:sha1:b36733c26de293fbc1562234f05ce2b41f7251a2
commit_hash:cc1f5b9ecc05f6b098f1645ba338fc644c0bb53f
Increase default error attributes string truncation limit to 32K2026-04-17T21:44:40Zbabenkobabenko@yandex-team.com2026-04-17T21:05:14Zurn:sha1:e42e88962f914b154f2993ea19182f392f0a2bdf
commit_hash:da3595c17e930ef69088c3164f42adc50d57f283
Fix some use-after-move bugs2026-04-17T13:37:33Zpavookpavook@yandex-team.com2026-04-17T12:40:13Zurn:sha1:70edb604e93a313f36e434fd25b312527d59f361
commit_hash:4bc357937e76b2b082671bb0f67ac3012ee4dbca
Add TErrorOr::ValueOrCrash2026-04-03T04:44:41Zdann239dann239@yandex-team.com2026-04-03T04:28:04Zurn:sha1:9cefd710e939e2e6e4ce1b91983e3b996d461837
commit_hash:7a04b71703a53450dbaa8ec880141545e019a71e
Intermediate changes2026-03-03T13:03:50Zrobot-pigletrobot-piglet@yandex-team.com2026-03-03T12:21:23Zurn:sha1:eb66a9584abe4b7eb91694cbefec33abe5a9b1d0
commit_hash:a66d1ef65085fb8e8bfe860b8b7a95cbc5793851
Fixed error comparison2026-02-20T19:06:38Zmikarimikari@yandex-team.com2026-02-20T18:39:29Zurn:sha1:7ce6de4e577aa2d195fa5ec995df862c60484b63
commit_hash:76b32cc3992d0c6ce820f0b52a06deade4fa7558