From: Ingo Molnar <mingo@elte.hu>
To: "Benjamin K. Stuhl" <benjamin.stuhl@colorado.edu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Thomas Gleixner <tglx@linutronix.de>,
Linux-Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: "sched: add vslice" causes horrible interactivity under load
Date: Sun, 27 Jan 2008 23:14:22 +0100 [thread overview]
Message-ID: <20080127221422.GA17085@elte.hu> (raw)
In-Reply-To: <20080127144400.78e0aec5@colorado.edu>
* Benjamin K. Stuhl <benjamin.stuhl@colorado.edu> wrote:
> I recently upgraded from 2.6.23.x to 2.6.24 and found that whereas
> with 2.6.23.x I could have multiple "make -j3" compilation runs going
> in the background with no real problems (on a dual-core Core 2), with
> 2.6.24 I get multiple-second lags when trying to switch tasks in KDE.
that sounds bad ... Could you send me the output of:
http://people.redhat.com/mingo/cfs-scheduler/tools/cfs-debug-info.sh
while such delays are happening? Please enable CONFIG_SCHED_DEBUG=y and
CONFIG_SCHEDSTATS=y as well before doing the dump. Also please send your
.config.
to get best output from cfs-debug-info.sh, please first run this:
http://people.redhat.com/mingo/cfs-scheduler/tools/cfs-debug-info-clear.sh
then reproduce the delay, and then run cfs-debug-info.sh to capture all
that task stats.
Ingo
next prev parent reply other threads:[~2008-01-27 22:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-27 21:44 "sched: add vslice" causes horrible interactivity under load Benjamin K. Stuhl
2008-01-27 22:14 ` Ingo Molnar [this message]
2008-01-27 22:17 ` Ingo Molnar
2008-01-27 22:19 ` Ingo Molnar
2008-01-28 15:32 ` Benjamin K. Stuhl
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