On 11/13/2013 12:25 PM, tip-bot for Peter Zijlstra wrote: > Commit-ID: 911b2898b3c9fe0048e9485ad1629ed4fce330fd > Gitweb: http://git.kernel.org/tip/911b2898b3c9fe0048e9485ad1629ed4fce330fd > Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > AuthorDate: Mon, 11 Nov 2013 18:21:56 +0100 > Committer: Ingo Molnar <mingo@xxxxxxxxxx> > 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@xxxxxxxxxx> > Suggested-by: Paul Turner <pjt@xxxxxxxxxx> > Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> > Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Link: http://lkml.kernel.org/r/20131111172925.GG26898@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx > Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Sorry for the delay. I took a vacation. As you know, this patch originally written me, then I already tested this. So, of course, Acked-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> # S-O-B is better? dunno. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html