From: Ingo Molnar <mingo@elte.hu>
To: Mike Galbraith <efault@gmx.de>
Cc: Al Boldi <a1426z@gawab.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: CFS review
Date: Tue, 28 Aug 2007 09:36:19 +0200 [thread overview]
Message-ID: <20070828073619.GA8267@elte.hu> (raw)
In-Reply-To: <1188286097.6317.12.camel@Homer.simpson.net>
* Mike Galbraith <efault@gmx.de> wrote:
> > I like your analysis, but how do you explain that these stalls
> > vanish when __update_curr is disabled?
>
> When you disable __update_curr(), you're utterly destroying the
> scheduler. There may well be a scheduler connection, but disabling
> __update_curr() doesn't tell you anything meaningful. Basically, you're
> letting all tasks run uninterrupted for just as long as they please
> (which is why busy loops lock your box solid as a rock). I'd suggest
> gathering some sched_debug stats or something... [...]
the output of the following would be nice:
http://people.redhat.com/mingo/cfs-scheduler/tools/cfs-debug-info.sh
captured while the gears are running.
Ingo
next prev parent reply other threads:[~2007-08-28 7:36 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-11 10:44 CFS review Al Boldi
2007-08-12 4:17 ` Ingo Molnar
2007-08-12 15:27 ` Al Boldi
2007-08-12 15:52 ` Ingo Molnar
2007-08-12 19:43 ` Al Boldi
2007-08-21 10:58 ` Ingo Molnar
2007-08-21 22:27 ` Al Boldi
2007-08-24 13:45 ` Ingo Molnar
2007-08-25 22:27 ` Al Boldi
2007-08-25 23:15 ` Ingo Molnar
2007-08-26 16:27 ` Al Boldi
2007-08-26 16:39 ` Ingo Molnar
2007-08-27 4:06 ` Al Boldi
2007-08-27 10:53 ` Ingo Molnar
2007-08-27 14:46 ` Al Boldi
2007-08-27 20:41 ` Ingo Molnar
2007-08-28 4:37 ` Al Boldi
2007-08-28 5:05 ` Linus Torvalds
2007-08-28 5:23 ` Al Boldi
2007-08-28 7:28 ` Mike Galbraith
2007-08-28 7:36 ` Ingo Molnar [this message]
2007-08-28 16:34 ` Linus Torvalds
2007-08-28 16:44 ` Arjan van de Ven
2007-08-28 16:45 ` Ingo Molnar
2007-08-29 4:19 ` Al Boldi
2007-08-29 4:53 ` Ingo Molnar
2007-08-29 5:58 ` Al Boldi
2007-08-29 6:43 ` Ingo Molnar
2007-08-28 20:46 ` Valdis.Kletnieks
2007-08-28 7:43 ` Xavier Bestel
2007-08-28 8:02 ` Ingo Molnar
2007-08-28 19:19 ` Willy Tarreau
2007-08-28 19:55 ` Ingo Molnar
2007-08-29 4:18 ` Ingo Molnar
2007-08-29 4:29 ` Keith Packard
2007-08-29 4:46 ` Ingo Molnar
2007-08-29 7:57 ` Keith Packard
2007-08-29 8:04 ` Ingo Molnar
2007-08-29 8:53 ` Al Boldi
2007-08-29 15:57 ` Keith Packard
2007-08-29 19:56 ` Rene Herman
2007-08-30 7:05 ` Rene Herman
2007-08-30 7:20 ` Ingo Molnar
2007-08-31 6:46 ` Tilman Sauerbeck
2007-08-31 10:44 ` DRM and/or X trouble (was Re: CFS review) Rene Herman
2007-08-31 14:55 ` DRM and/or X trouble Satyam Sharma
2007-08-30 16:06 ` CFS review Chuck Ebbert
2007-08-30 16:48 ` Rene Herman
2007-08-29 4:40 ` Mike Galbraith
2007-08-29 3:42 ` Bill Davidsen
2007-08-29 3:37 ` Bill Davidsen
2007-08-29 3:45 ` Ingo Molnar
2007-08-29 13:11 ` Bill Davidsen
-- strict thread matches above, loose matches on Subject: below --
2007-07-10 8:31 -mm merge plans for 2.6.23 Andrew Morton
2007-07-11 12:43 ` x86 status was " Andi Kleen
2007-07-11 17:42 ` Ingo Molnar
2007-07-11 21:16 ` Andi Kleen
2007-07-11 21:46 ` Andrea Arcangeli
2007-07-11 22:09 ` Linus Torvalds
2007-07-13 2:23 ` Roman Zippel
2007-07-13 4:47 ` Mike Galbraith
2007-07-13 17:23 ` Roman Zippel
2007-07-14 5:04 ` Mike Galbraith
2007-08-01 3:41 ` CFS review Roman Zippel
2007-08-01 7:12 ` Ingo Molnar
2007-08-01 7:26 ` Mike Galbraith
2007-08-01 7:30 ` Ingo Molnar
2007-08-01 7:36 ` Mike Galbraith
2007-08-01 8:49 ` Mike Galbraith
2007-08-01 13:19 ` Roman Zippel
2007-08-01 15:07 ` Ingo Molnar
2007-08-01 17:10 ` Andi Kleen
2007-08-01 16:27 ` Linus Torvalds
2007-08-01 17:48 ` Andi Kleen
2007-08-01 17:50 ` Ingo Molnar
2007-08-01 18:01 ` Roman Zippel
2007-08-01 19:05 ` Ingo Molnar
2007-08-09 23:14 ` Roman Zippel
2007-08-10 5:49 ` Ingo Molnar
2007-08-10 13:52 ` Roman Zippel
2007-08-10 14:18 ` Ingo Molnar
2007-08-10 16:47 ` Mike Galbraith
2007-08-10 17:19 ` Roman Zippel
2007-08-10 16:54 ` Michael Chang
2007-08-10 17:25 ` Roman Zippel
2007-08-10 19:44 ` Ingo Molnar
2007-08-10 19:47 ` Willy Tarreau
2007-08-10 21:15 ` Roman Zippel
2007-08-10 21:36 ` Ingo Molnar
2007-08-10 22:50 ` Roman Zippel
2007-08-11 5:28 ` Willy Tarreau
2007-08-12 5:17 ` Ingo Molnar
2007-08-11 0:30 ` Ingo Molnar
2007-08-20 22:19 ` Roman Zippel
2007-08-21 7:33 ` Mike Galbraith
2007-08-21 8:35 ` Ingo Molnar
2007-08-21 11:54 ` Roman Zippel
2007-08-11 5:15 ` Willy Tarreau
2007-08-10 7:23 ` Mike Galbraith
2007-08-01 11:22 ` Ingo Molnar
2007-08-01 12:21 ` Roman Zippel
2007-08-01 12:23 ` Ingo Molnar
2007-08-01 13:59 ` Ingo Molnar
2007-08-01 14:04 ` Arjan van de Ven
2007-08-01 15:44 ` Roman Zippel
2007-08-01 17:41 ` Ingo Molnar
2007-08-01 18:14 ` Roman Zippel
2007-08-03 3:04 ` Matt Mackall
2007-08-03 3:57 ` Arjan van de Ven
2007-08-03 4:18 ` Willy Tarreau
2007-08-03 4:31 ` Arjan van de Ven
2007-08-03 4:53 ` Willy Tarreau
2007-08-03 4:38 ` Matt Mackall
2007-08-03 8:44 ` Ingo Molnar
2007-08-03 9:29 ` Andi Kleen
2007-08-01 11:37 ` Ingo Molnar
2007-08-01 12:27 ` Roman Zippel
2007-08-01 13:20 ` Andi Kleen
2007-08-01 13:33 ` Roman Zippel
2007-08-01 14:36 ` Ingo Molnar
2007-08-01 16:11 ` Andi Kleen
2007-08-02 2:17 ` Linus Torvalds
2007-08-02 4:57 ` Willy Tarreau
2007-08-02 10:43 ` Andi Kleen
2007-08-02 10:07 ` Willy Tarreau
2007-08-02 16:09 ` Ingo Molnar
2007-08-02 22:38 ` Roman Zippel
2007-08-02 19:16 ` Daniel Phillips
2007-08-02 23:23 ` Roman Zippel
2007-08-01 14:40 ` Ingo Molnar
2007-08-01 14:49 ` Peter Zijlstra
2007-08-02 17:36 ` Roman Zippel
2007-08-02 15:46 ` Ingo Molnar
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