Date: Sat, 17 Jul 2010 19:24:33 +0100 From: Rui Paulo <rpaulo@FreeBSD.org> To: Doug Barton <dougb@FreeBSD.org> Cc: freebsd-current@FreeBSD.org Subject: Re: Why is intr taking up so much cpu? Message-ID: <F653FF83-D9CF-42A2-AE9A-B8F914090065@FreeBSD.org> In-Reply-To: <alpine.BSF.2.00.1007171103060.1546@qbhto.arg> References: <alpine.BSF.2.00.1007170013191.7378@qbhto.arg> <A81B337F-5932-44B1-BDB4-D9DD36332A16@lavabit.com> <alpine.BSF.2.00.1007171103060.1546@qbhto.arg>
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On 17 Jul 2010, at 19:04, Doug Barton wrote: > On Sat, 17 Jul 2010, Rui Paulo wrote: >=20 >>=20 >> On 17 Jul 2010, at 08:17, Doug Barton wrote: >>=20 >>> This is happening after I open a flash video in firefox and watch it = for >>>> 15 minutes: >>>=20 >>> root 20 -80 - 0K 160K WAIT 0 3:38 14.08% intr >>>=20 >>> After this happens, my system goes into a death spiral and I have to = shut it down. >>>=20 >>> vmstat -i >>> interrupt total rate >>> irq1: atkbd0 10384 0 >>> irq9: acpi0 5 0 >>> irq14: ata0 153410 7 >>> irq15: ata1 58 0 >>> irq17: wpi0 534038 27 >>> irq20: hpet0 uhci0+ 2496833 129 >>> irq22: uhci2 66485 3 >>> cpu0:timer 19238037 999 >>> irq256: hdac0 189713 9 >>> cpu1:timer 19236431 999 >>> Total 41925394 2178 >>>=20 >>>=20 >>> Any suggestions? current (r210135), i386 smp. Dell C2D laptop. >>=20 >> What's vmstat -i before the event happens? >=20 > Here is the output after a clean boot: >=20 > interrupt total rate > irq1: atkbd0 424 4 > irq9: acpi0 2 0 > irq14: ata0 3266 30 > irq15: ata1 58 0 > irq17: wpi0 2012 18 > irq20: hpet0 uhci0+ 13763 129 > irq22: uhci2 16 0 > cpu0:timer 105150 991 > irq256: hdac0 10 0 > cpu1:timer 103716 978 > Total 228417 2154 >=20 > Thanks for the response, This doesn't indicate any problem. I suggest you try to figure out what = interrupt is causing this by adding printfs or disabling drivers one by = one. Regards, -- Rui Paulo
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