[Bug 195098] pthread lock performance degradation on single CPU VM in FreeBSD 10.0
bugzilla-noreply at freebsd.org
bugzilla-noreply at freebsd.org
Fri Dec 5 14:38:28 UTC 2014
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195098
Ed Maste <emaste at freebsd.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|New |Closed
Resolution|--- |Unable to Reproduce
Summary|pthread lock performance |pthread lock performance
|degradation on single CPU |degradation on single CPU
|VM |VM in FreeBSD 10.0
--- Comment #4 from Ed Maste <emaste at freebsd.org> ---
In comment 2 I missed including in the reproduction detail that this was the
10.0-REL VM. When I mentioned this kib@ pointed out that this is fixed already
in r270423, and is included in the FreeBSD 10.1 release.
> Restore pre-r239157 handling of sched_yield(), when thread time slice was
> aborted, allowing other threads to run. Without this change thread is just
> rescheduled again, that was illustrated by provided test tool.
HEAD: r270423
https://svnweb.freebsd.org/base?view=revision&revision=270423
stable/10: r271194
https://svnweb.freebsd.org/base?view=revision&revision=271194
stable/9: r271195
https://svnweb.freebsd.org/base?view=revision&revision=271195
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