linux-kernel - Re: 2.6.24-git4+ regression

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Message-ID: <20080204143622.GC4329@ics.muni.cz>
Date:	Mon, 4 Feb 2008 15:36:22 +0100
From:	Lukas Hejtmanek <xhejtman@....muni.cz>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Ingo Molnar <mingo@...e.hu>, mingo@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.24-git4+ regression

On Mon, Feb 04, 2008 at 12:36:36PM +0100, Peter Zijlstra wrote:
> I can't reproduce this with a pure cpu load. I started 10 
>   while :; do :; done &
> instances and aside from slowing down, nothing bad happened.

yes, while true; do true; does nothing wrong. But running make -j2 in kernel
sources or mesa sources is catastrophic.
 
> May I suggest you try latency top to see if there is something in your
> build scenario that generates horrible latencies (some IO path or
> whatnot).

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.

-- 
Lukáš Hejtmánek
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