Date: Wed, 10 Mar 2004 15:57:12 -0800
From: Andrew Morton <akpm@osdl.org>
To: Brad Laue <brad@brad-x.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: ksoftirqd using mysteriously high amounts of CPU time
Message-Id: <20040310155712.7472e31c.akpm@osdl.org>
In-Reply-To: <404F85A6.6070505@brad-x.com>
References: <404F85A6.6070505@brad-x.com>
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Brad Laue <brad@brad-x.com> wrote:
>
> I'm running into an issue where ksoftirqd/0 consumes a considerably 
> larger amount of CPU time  than it should, and begins to actively 
> consume 99% CPU time during network operations.

Please ensure that the machine was booted with `profile=1' on
the kernel boot command line.  The cost of this is negligible.

When the problem starts happening, run:

sudo readprofile -r
sleep 10
sudo readprofile -n -v -m /boot/System.map | sort -n +2 | tail -40

(make sure that /boot/System.map refers to the currently-running kernel)
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