Messages in this thread |  | | Subject | Re: [tip:sched/urgent] sched: Optimize task_sched_runtime() | From | Davidlohr Bueso <> | Date | Mon, 18 Nov 2013 19:16:42 -0800 |
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On Wed, 2013-11-13 at 09:25 -0800, tip-bot for Peter Zijlstra wrote: > Commit-ID: 911b2898b3c9fe0048e9485ad1629ed4fce330fd > Gitweb: http://git.kernel.org/tip/911b2898b3c9fe0048e9485ad1629ed4fce330fd > Author: Peter Zijlstra <peterz@infradead.org> > AuthorDate: Mon, 11 Nov 2013 18:21:56 +0100 > Committer: Ingo Molnar <mingo@kernel.org> > CommitDate: Wed, 13 Nov 2013 13:33:54 +0100 > > sched: Optimize task_sched_runtime() > > Large multi-threaded apps like to hit this using do_sys_times() and > then queue up on the rq->lock. > > Avoid when possible. > > Larry reported ~20% performance increase his test case. > > Reported-by: Larry Woodman <lwoodman@redhat.com> > Suggested-by: Paul Turner <pjt@google.com> > Signed-off-by: Peter Zijlstra <peterz@infradead.org> > Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> > Cc: Linus Torvalds <torvalds@linux-foundation.org> > Cc: Andrew Morton <akpm@linux-foundation.org> > Link: http://lkml.kernel.org/r/20131111172925.GG26898@twins.programming.kicks-ass.net > Signed-off-by: Ingo Molnar <mingo@kernel.org>
For what it's worth:
Tested-by: Davidlohr Bueso <davidlohr@hp.com>
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