From: Ingo Molnar <mingo@elte.hu>
To: Mike Galbraith <efault@gmx.de>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
Dhaval Giani <dhaval@linux.vnet.ibm.com>,
Dmitry Adamushko <dmitry.adamushko@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [git] CFS-devel, latest code
Date: Tue, 25 Sep 2007 11:13:31 +0200 [thread overview]
Message-ID: <20070925091331.GA22905@elte.hu> (raw)
In-Reply-To: <1190709207.11226.6.camel@Homer.simpson.net>
* Mike Galbraith <efault@gmx.de> wrote:
> > sched_debug (attached) is.. strange.
>
> Disabling CONFIG_FAIR_GROUP_SCHED fixed both. [...]
heh. Evil plan to enable the group scheduler by default worked out as
planned! ;-) [guess how many container users would do ... interactivity
tests like you do??]
> [...] Latencies of up to 336ms hit me during the recompile (make -j3),
> with nothing else running. Since reboot, latencies are, so far, very
> very nice. [...]
'very very nice' == 'best ever' ? :-)
> [...] I'm leaving it disabled for now.
ok, i'm too seeing some sort of latency weirdness with
CONFIG_FAIR_GROUP_SCHED enabled, _if_ there's Xorg involved which runs
under root uid on my box - and hence gets 50% of all CPU time.
Srivatsa, any ideas? It could either be an accounting buglet (less
likely, seems like the group scheduling bits stick to the 50% splitup
nicely), or a preemption buglet. One potential preemption buglet would
be for the group scheduler to not properly preempt a running task when a
task from another uid is woken?
Ingo
next prev parent reply other threads:[~2007-09-25 9:13 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-24 21:45 [git] CFS-devel, latest code Ingo Molnar
2007-09-24 21:55 ` Andrew Morton
2007-09-24 21:59 ` Ingo Molnar
2007-09-25 0:08 ` Daniel Walker
2007-09-25 6:45 ` Ingo Molnar
2007-09-25 15:17 ` Daniel Walker
2007-09-25 6:10 ` Mike Galbraith
2007-09-25 7:35 ` Mike Galbraith
2007-09-25 8:33 ` Mike Galbraith
2007-09-25 8:53 ` Srivatsa Vaddagiri
2007-09-25 9:11 ` Srivatsa Vaddagiri
2007-09-25 9:15 ` Mike Galbraith
2007-09-25 9:12 ` Mike Galbraith
2007-09-25 9:13 ` Ingo Molnar [this message]
2007-09-25 9:17 ` Mike Galbraith
2007-09-25 9:47 ` Ingo Molnar
2007-09-25 10:02 ` Mike Galbraith
2007-09-26 8:04 ` Mike Galbraith
2007-09-28 21:46 ` Bill Davidsen
2007-09-25 9:44 ` Srivatsa Vaddagiri
2007-09-25 9:40 ` Ingo Molnar
2007-09-25 10:10 ` Ingo Molnar
2007-09-25 10:28 ` Srivatsa Vaddagiri
2007-09-25 10:36 ` Ingo Molnar
2007-09-25 11:33 ` Ingo Molnar
2007-09-25 14:48 ` Srivatsa Vaddagiri
2007-09-25 12:51 ` Srivatsa Vaddagiri
2007-09-25 13:35 ` Mike Galbraith
2007-09-25 14:07 ` Srivatsa Vaddagiri
2007-09-25 12:28 ` Mike Galbraith
2007-09-25 12:54 ` Mike Galbraith
[not found] ` <20070925131717.GM26289@linux.vnet.ibm.com>
[not found] ` <1190725693.13716.10.camel@Homer.simpson.net>
[not found] ` <20070925132528.GN26289@linux.vnet.ibm.com>
[not found] ` <1190726682.11260.1.camel@Homer.simpson.net>
[not found] ` <20070925140559.GB26310@linux.vnet.ibm.com>
[not found] ` <20070925143755.GA15594@elte.hu>
[not found] ` <20070926210737.GA8663@elte.hu>
2007-10-01 14:04 ` [RFC/PATCH] Add sysfs control to modify a user's cpu share Dhaval Giani
2007-10-01 14:44 ` Ingo Molnar
2007-10-01 15:32 ` Srivatsa Vaddagiri
2007-10-02 22:12 ` Eric St-Laurent
2007-10-03 4:09 ` Srivatsa Vaddagiri
2007-10-03 17:10 ` [RFC/PATCH -v2] " Dhaval Giani
2007-10-04 7:57 ` Ingo Molnar
2007-10-04 8:54 ` Heiko Carstens
2007-10-04 16:02 ` Bill Davidsen
2007-10-04 17:20 ` Srivatsa Vaddagiri
2007-10-04 21:32 ` Valdis.Kletnieks
2007-10-05 7:01 ` Srivatsa Vaddagiri
2007-10-09 15:12 ` [PATCH sched-devel] Generate uevents for user creation/destruction Srivatsa Vaddagiri
2007-10-10 7:42 ` Ingo Molnar
2007-10-01 16:12 ` [RFC/PATCH] Add sysfs control to modify a user's cpu share Dave Jones
2007-10-01 16:37 ` Srivatsa Vaddagiri
2007-09-25 6:50 ` [git] CFS-devel, latest code S.Çağlar Onur
2007-09-25 9:17 ` Ingo Molnar
2007-09-25 7:41 ` Andrew Morton
2007-09-25 8:43 ` Srivatsa Vaddagiri
2007-09-25 8:48 ` Andrew Morton
2007-09-25 11:00 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2007-09-25 14:44 Ingo Molnar
2007-09-25 16:04 ` Srivatsa Vaddagiri
2007-09-25 16:08 ` Srivatsa Vaddagiri
2007-09-25 21:35 Dmitry Adamushko
2007-09-27 7:56 ` Ingo Molnar
2007-09-30 19:13 Dmitry Adamushko
2007-10-01 6:11 ` Ingo Molnar
2007-09-30 19:15 Dmitry Adamushko
2007-10-01 5:53 ` Mike Galbraith
2007-10-01 5:55 ` Ingo Molnar
2007-09-30 19:18 Dmitry Adamushko
2007-10-02 19:49 Dmitry Adamushko
2007-10-02 19:59 ` Dmitry Adamushko
2007-10-03 4:15 ` Srivatsa Vaddagiri
2007-10-04 7:40 ` Ingo Molnar
2007-10-04 7:41 ` Ingo Molnar
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