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author | Kevin Easton <kevin@guarana.org> | 2015-02-24 23:57:07 -0500 |
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committer | Mike Frysinger <vapier@gentoo.org> | 2015-02-24 23:58:59 -0500 |
commit | 6807b1db8233ed84671f061b5d825622233df303 (patch) | |
tree | bb908172e2818cf53b090c206b213c9d0cb652d2 /nptl/perf.c | |
parent | b433df00ae7b72053b2aac5bea1ded269ea92589 (diff) | |
download | glibc-6807b1db8233ed84671f061b5d825622233df303.zip glibc-6807b1db8233ed84671f061b5d825622233df303.tar.gz glibc-6807b1db8233ed84671f061b5d825622233df303.tar.bz2 |
Reduce lock contention in __tz_convert() [BZ #16145] (partial fix)
This patch is an "easy win" partial fix for BZ #16145, which notes
the heavy contention on tzset_lock when multiple threads are converting
times with localtime_r().
In __tz_convert(), the lock does not need to be held after
__tzfile_compute() / __tz_compute() have been called, so we can move the
unlock up. At this point there is still significant work to be done in
__offtime(), so we see some improvement (in my testing with 8 cores
banging on localtime_r(), ~20% improvement in throughput).
Diffstat (limited to 'nptl/perf.c')
0 files changed, 0 insertions, 0 deletions