From: Mike Galbraith <efault@gmx.de>
To: Frans Pop <elendil@planet.nl>
Cc: Arjan van de Ven <arjan@infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <peterz@infradead.org>,
linux-wireless@vger.kernel.org
Subject: Re: [.32-rc3] scheduler: iwlagn consistently high in "waiting for CPU"
Date: Fri, 09 Oct 2009 22:06:20 +0200 [thread overview]
Message-ID: <1255118780.7305.13.camel@marge.simson.net> (raw)
In-Reply-To: <200910091827.01774.elendil@planet.nl>
On Fri, 2009-10-09 at 18:27 +0200, Frans Pop wrote:
> On Friday 09 October 2009, Mike Galbraith wrote:
> > sched: update the clock of runqueue select_task_rq() selected.
> >
> > In try_to_wake_up(), we update the runqueue clock, but select_task_rq()
> > may select a different runqueue than the one we updated, leaving the new
> > runqueue's clock stale for a bit.
> >
> > This patch cures occasional huge latencies reported by latencytop when
> > coming out of idle on a mostly idle NO_HZ box.
>
> This patch (without Arjan's previous one applied) also fixes my latency
> issues. Nice work!
Thanks for the confirmation (and kind words).
-Mike
next prev parent reply other threads:[~2009-10-09 20:07 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-05 13:00 [.32-rc3] scheduler: iwlagn consistently high in "waiting for CPU" Frans Pop
2009-10-05 14:13 ` Frans Pop
2009-10-05 14:24 ` Arjan van de Ven
2009-10-06 15:49 ` Frans Pop
2009-10-07 17:10 ` Frans Pop
2009-10-07 18:10 ` Mike Galbraith
2009-10-07 18:34 ` Frans Pop
2009-10-08 4:05 ` Mike Galbraith
2009-10-08 6:23 ` Mike Galbraith
2009-10-08 13:40 ` Arjan van de Ven
2009-10-08 14:13 ` Mike Galbraith
2009-10-08 14:54 ` Mike Galbraith
2009-10-08 14:55 ` Frans Pop
2009-10-08 15:09 ` Arjan van de Ven
2009-10-08 18:23 ` Mike Galbraith
2009-10-08 20:34 ` Markus Trippelsdorf
2009-10-09 3:35 ` Mike Galbraith
2009-10-09 3:51 ` Markus Trippelsdorf
2009-10-08 20:59 ` Frans Pop
2009-10-09 3:04 ` Mike Galbraith
2009-10-09 6:35 ` Mike Galbraith
2009-10-09 7:13 ` Peter Zijlstra
2009-10-09 7:55 ` Sedat Dilek
2009-10-09 8:06 ` Peter Zijlstra
2009-10-09 16:27 ` Frans Pop
2009-10-09 20:06 ` Mike Galbraith [this message]
2009-10-08 11:24 ` Mike Galbraith
2009-10-08 13:09 ` Frans Pop
2009-10-08 13:18 ` Mike Galbraith
2009-10-08 13:45 ` Arjan van de Ven
2009-10-08 14:15 ` Mike Galbraith
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