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| author | Sergey Vojtovich <svoj@mariadb.org> | 2015-06-17 18:55:38 +0400 |
|---|---|---|
| committer | Sergey Vojtovich <svoj@mariadb.org> | 2015-06-19 15:06:34 +0400 |
| commit | 8f603bcbcac4a9091b6adbca3fd3655a947e759a (patch) | |
| tree | a1933d1f9e4ed69b7903d5018b584205c4d80510 /include | |
| parent | 2bc6e29afeea374aa0ef4bc36c7a7b649c20d959 (diff) | |
| download | mariadb-git-8f603bcbcac4a9091b6adbca3fd3655a947e759a.tar.gz | |
MDEV-7952 - clock_gettime() takes 0.24% in OLTP RO
Initialize abs_timeout when it is about to be used. This saves one my_hrtime()
call on hot path (when we acquire MDL lock without waiting).
When filling I_S.PROCESSLIST use THD::start_utime/THD::utime_after_query instead
of THD::start_time. This allows us to save 2 clock_gettime() calls.
Overhead change:
__clock_gettime 0.13% -> 0.11% (122 -> 76 calls per OLTP RO transaction)
my_interval_timer 0.07% -> 0.06%
my_hrtime 0.04% -> 0.01%
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions