threads/167308: Performance regression in thread locking on 8-stable [regression]

Thu Apr 26 02:45:33 UTC 2012

On 2012/4/26 9:44, linimon at FreeBSD.org wrote:
> Old Synopsis: Perf regression in thread locking on 8-stable
> New Synopsis: Performance regression in thread locking on 8-stable [regression]
>
> Responsible-Changed-From-To: freebsd-threads->davidxu
> Responsible-Changed-By: linimon
> Responsible-Changed-When: Thu Apr 26 01:41:20 UTC 2012
> Responsible-Changed-Why:
> Over to committer of r234373.
>
> http://www.freebsd.org/cgi/query-pr.cgi?pr=167308
>
This is a known problem that the unlocking is not optimized when the mutex
is heavily contented, I may MFC wake2 later.