Date: Sat, 17 Jul 2010 12:23:23 -0700 (PDT) From: Doug Barton <dougb@FreeBSD.org> To: Kostik Belousov <kostikbel@gmail.com> Cc: freebsd-current@freebsd.org, Rui Paulo <rpaulo@freebsd.org> Subject: Re: Why is intr taking up so much cpu? Message-ID: <alpine.BSF.2.00.1007171222560.1538@qbhto.arg> In-Reply-To: <20100717192128.GM2381@deviant.kiev.zoral.com.ua> References: <alpine.BSF.2.00.1007170013191.7378@qbhto.arg> <A81B337F-5932-44B1-BDB4-D9DD36332A16@lavabit.com> <alpine.BSF.2.00.1007171103060.1546@qbhto.arg> <F653FF83-D9CF-42A2-AE9A-B8F914090065@FreeBSD.org> <alpine.BSF.2.00.1007171208010.1538@qbhto.arg> <20100717192128.GM2381@deviant.kiev.zoral.com.ua>
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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 -- Improve the effectiveness of your Internet presence with a domain name makeover! http://SupersetSolutions.com/ Computers are useless. They can only give you answers. -- Pablo Picasso
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