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From: drago01 <drago01@gmail.com>
To: kernel list <linux-kernel@vger.kernel.org>
Cc: mingo@redhat.com, Chuck Ebbert <cebbert@redhat.com>
Subject: sched regression introduced by NO_NEW_FAIR_SLEEPERS
Date: Sun, 27 Sep 2009 21:47:10 +0200	[thread overview]
Message-ID: <f6ca9fed0909271247k7fad64b1g1c4c65544196d7ac@mail.gmail.com> (raw)

Hi,

Chuck has backported some scheduler patches from 2.6.32 to the fedora kernel.

I did the following test to test the new scheduler (cpu is a core i7
920 4 cores + HT).

run 8 "md5sum /dev/urandom" task and try to use the desktop (compiz).

The result was that moving windows or rotating the cube is very slow.
(same happens with pure metacity but is is worse in compiz).

Mounting debugfs and doing "echo NEW_FAIR_SLEEPERS > sched_features"
results into a useable desktop while the 8 md5sum tasks are running
(ie. the system behaves as if they where not running at all from an
interactivity pov).


P.S: please CC me when replying.

             reply	other threads:[~2009-09-27 19:47 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-09-27 19:47 drago01 [this message]
2009-09-27 19:50 ` drago01
2009-09-27 19:52   ` drago01
2009-10-03 10:47   ` Ingo Molnar
2009-10-03 13:23     ` drago01
2009-10-03 14:49       ` Ingo Molnar
2009-09-27 20:06 ` drago01

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