From: Lukas Hejtmanek <xhejtman@ics.muni.cz>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>,
mingo@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: 2.6.24-git4+ regression
Date: Mon, 4 Feb 2008 18:00:49 +0100 [thread overview]
Message-ID: <20080204170049.GA4207@ics.muni.cz> (raw)
In-Reply-To: <1202136310.6890.0.camel@lappy>
On Mon, Feb 04, 2008 at 03:45:10PM +0100, Peter Zijlstra wrote:
> > see my previous mail to Ingo (you were Cc.), latency top says that Xorg and
> > gnome-terminal suffers 300+ms latency in scheduler: waiting for cpu.
>
> what happens when you turn CONFIG_FAIR_GROUP_SCHED off?
If I disable CONFIG_FAIR_GROUP_SCHED, it is a lot better. I would not call it
optimal, though.
Xorg has 20ms latency, gnome-terminal another 20ms latency. If I just press
a key (a letter for instance) to see how autorepeat fills terminal, one can
see that autorepeat is not smooth and it is stopping for a little while
(really extra short stops are visible but still visible). But it is really
a ton better that it was with fair group sched.
So, any conclusion? The case is closed or any further investigation should be
done?
--
Lukáš Hejtmánek
next prev parent reply other threads:[~2008-02-04 17:01 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-30 13:56 2.6.24-git4+ regression Lukas Hejtmanek
2008-01-31 10:29 ` Ingo Molnar
2008-01-31 10:55 ` Lukas Hejtmanek
2008-02-04 11:17 ` Lukas Hejtmanek
2008-02-04 11:36 ` Peter Zijlstra
2008-02-04 14:36 ` Lukas Hejtmanek
2008-02-04 14:45 ` Peter Zijlstra
2008-02-04 17:00 ` Lukas Hejtmanek [this message]
2008-02-04 12:01 ` Ingo Molnar
2008-02-04 12:29 ` Lukas Hejtmanek
2008-02-04 13:04 ` Ingo Molnar
2008-02-04 13:49 ` Lukas Hejtmanek
2008-02-14 16:55 ` Srivatsa Vaddagiri
2008-02-17 20:26 ` Lukas Hejtmanek
2008-02-18 4:28 ` Ingo Molnar
2008-02-18 7:38 ` Mike Galbraith
2008-02-18 8:20 ` Srivatsa Vaddagiri
2008-02-18 8:36 ` Mike Galbraith
[not found] ` <1203325554.4889.2.camel@homer.simson.net>
[not found] ` <1203345102.5984.1.camel@homer.simson.net>
2008-02-19 8:15 ` Mike Galbraith
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