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Date: Sat, 17 Jul 2010 12:23:23 -0700 (PDT)
From: Doug Barton <dougb@FreeBSD.org>
To: Kostik Belousov <kostikbel@gmail.com>
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Cc: freebsd-current@freebsd.org, Rui Paulo <rpaulo@freebsd.org>
Subject: Re: Why is intr taking up so much cpu?
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On Sat, 17 Jul 2010, Kostik Belousov wrote:

> Note that intr time most likely come from the interrupt threads chewing
> the CPU, not from the real interrupt handlers doing something, and definitely
> not due to the high interrupt rate, as your vmstat -i output already shown.
>
> Run top in the mode where all system threads are shown separately
> (e.g. top -HS seems to do it), then watch what thread eats the processor.

Ok, thanks, I'll definitely do that next time and report the results.


Doug

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