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From: Mike Galbraith <efault@gmx.de>
To: Ed Tomlinson <edt@aei.ca>
Cc: Ingo Molnar <mingo@elte.hu>,
	linux-kernel@vger.kernel.org,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Arjan van de Ven <arjan@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Dmitry Adamushko <dmitry.adamushko@gmail.com>,
	Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Subject: Re: [patch] CFS scheduler, -v19
Date: Sun, 15 Jul 2007 07:25:33 +0200	[thread overview]
Message-ID: <1184477133.6378.21.camel@Homer.simpson.net> (raw)
In-Reply-To: <200707141319.13270.edt@aei.ca>

On Sat, 2007-07-14 at 13:19 -0400, Ed Tomlinson wrote:
> Hi,

Hi Ed,

> I run a java application at nice 15.  Its been a background application here for as long
> as SD and CFS have been around.  If I have a compile running at nice 0, with v19 java 
> gets so little cpu that the the wrapper that runs to monitor it is timing out waiting for 
> it to start.  This is new in v19 - something in v19 is not meshing well with my mix 
> of applications...
> 
> Kernel is gentoo 2.6.22-r1 + cfs v19
> 
> How can I help to debug this?

I hear Ingo is off having a genuine long weekend, but in the meantime,
you could try echo 30 > /proc/sys/kernel/sched_features to eliminate the
sleeper fairness changes in v19, since that was the biggest change.

Sending a few seconds of logged /proc/sched_debug will also help get a
picture of what's happening, and lovely would be a method to reproduce
the problem locally.

	-Mike


  reply	other threads:[~2007-07-15  5:25 UTC|newest]

Thread overview: 66+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-06 17:33 Ingo Molnar
2007-07-08 17:46 ` Willy Tarreau
2007-07-09 22:39   ` Ingo Molnar
2007-07-17 21:44     ` Willy Tarreau
2007-07-10  8:08 ` Mike Galbraith
2007-07-11 17:26   ` Bill Davidsen
2007-07-11 20:55     ` Ingo Molnar
2007-07-12 12:41       ` Bill Davidsen
2007-07-13 21:19       ` Bill Davidsen
2007-07-16 21:34         ` Chuck Ebbert
2007-07-16 21:55           ` Ingo Molnar
2007-07-17  4:22             ` Bill Davidsen
2007-07-17  5:01             ` Ian Kent
2007-07-17  7:45               ` Ingo Molnar
2007-07-17 11:17                 ` Ian Kent
2007-07-17 17:16                   ` Ingo Molnar
2007-07-18  1:24                     ` Bill Davidsen
2007-07-18  6:19                       ` Ian Kent
2007-07-17 16:30                 ` Chuck Ebbert
2007-07-17 21:16                 ` David Schwartz
2007-07-18  5:59                   ` Ian Kent
2007-07-18  7:54                     ` Ingo Molnar
2007-07-18 13:50                       ` Bill Davidsen
2007-07-18 17:23                       ` Linus Torvalds
2007-07-18 16:03                 ` Linus Torvalds
2007-07-18 17:31                   ` Ian Kent
2007-07-18 21:37                   ` Bill Davidsen
2007-07-19  8:53                     ` Ingo Molnar
2007-07-19 14:32                     ` Ingo Molnar
2007-07-19 17:06                       ` Bill Davidsen
2007-07-19 17:10                         ` Ingo Molnar
2007-07-19 17:17                         ` Ingo Molnar
2007-07-19 17:26                         ` Bill Davidsen
2007-07-19 17:42                           ` Ingo Molnar
2007-07-20  2:32                       ` Bill Davidsen
2007-07-19  8:16                   ` Ingo Molnar
2007-07-14 11:34 ` Markus
2007-07-14 15:11   ` Markus
2007-07-16  9:41     ` Ingo Molnar
2007-07-16 17:59       ` Markus
2007-07-17  7:37         ` Ingo Molnar
2007-07-17 13:06           ` Markus
2007-07-17 17:06             ` Ingo Molnar
2007-07-17 17:13               ` Ingo Molnar
2007-07-17 19:42               ` Markus
2007-07-17 20:09                 ` Ingo Molnar
2007-07-17 20:37                   ` Linus Torvalds
2007-07-17 20:43                     ` Ingo Molnar
2007-07-17 22:03                       ` Markus
2007-07-20 22:26                       ` Markus
2007-07-22 11:59                         ` konqueror suddenly vanishing, "konqueror: Fatal IO error: client killed" Ingo Molnar
2007-07-22 14:26                           ` Markus
2007-08-09 17:34                       ` [patch] CFS scheduler, -v19 Markus
2007-08-10  7:46                         ` Ingo Molnar
2007-08-14 17:15                           ` Markus
2007-10-17  0:02                       ` Markus
2007-07-14 17:19 ` Ed Tomlinson
2007-07-15  5:25   ` Mike Galbraith [this message]
2007-07-15 12:53     ` Markus
2007-07-15 19:46       ` Mike Galbraith
2007-07-15 21:11         ` Markus
2007-07-16  6:42           ` Mike Galbraith
2007-07-16  8:00     ` Ingo Molnar
2007-07-16  9:17   ` Ingo Molnar
2007-07-16 11:10     ` Ed Tomlinson
2007-07-08 20:51 Al Boldi

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