linux-kernel - Re: [patch] clockevents: drivers for i386, fix #2

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Date:	Wed, 4 Oct 2006 09:55:40 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...l.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, Jim Gettys <jg@...top.org>,
	John Stultz <johnstul@...ibm.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: [patch] clockevents: drivers for i386, fix #2


* Andrew Morton <akpm@...l.org> wrote:

> None of the interrupts are doing anything wrong.  oprofile shows 
> nothing alarming.
> 
> Disabling cpufreq in config doesn't fix it.
> 
> Userspace can count to a billion in 3.9 seconds when this problem is 
> present, which is the same time as it takes on a non-slow kernel.
> 
> `sleep 5' takes 5 seconds.
> 
> Yet initscripts take a long time (especially applying the ipfilter 
> firewall rues for some reason), and `startx' takes a long time, etc.  
> This kernel takes 112 seconds to boot to a login prompt - other 
> kernels take 56 seconds (interesting ratio..)

hm, do you have the NMI watchdog enabled by any chance? [in particular, 
do you have nmi_watchdog=2?] Although your bootlog does not show it.

	Ingo
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