Date: Tue, 3 Nov 2009 19:47:59 +0300 From: Igor Sysoev <is@rambler-co.ru> To: Attilio Rao <attilio@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: interrupt threads CPU usage in FreeBSD 8.0 Message-ID: <20091103164759.GI6305@rambler-co.ru> In-Reply-To: <3bbf2fe10911030836r173b4b3boe606e2222fbdfff6@mail.gmail.com> References: <20091021101243.GE3199@rambler-co.ru> <3bbf2fe10911030836r173b4b3boe606e2222fbdfff6@mail.gmail.com>
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On Tue, Nov 03, 2009 at 05:36:55PM +0100, Attilio Rao wrote:
> 2009/10/21 Igor Sysoev <is@rambler-co.ru>:
> > Hi,
> >
> > for some reason in 8.0 top always shows 0% CPU usage for intr kernel
> > process and active interrupt thread, "irq19 bge0" in my case.
> >
> > 8-0 RC1 top -PS:
> >
> > CPU 0: 27.8% user, 0.0% nice, 7.1% system, 0.0% interrupt, 65.0% idle
> > CPU 1: 3.0% user, 0.0% nice, 2.3% system, 7.1% interrupt, 87.6% idle
> >
> > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> > 11 root 2 171 ki31 0K 32K RUN 0 140.7H 152.54% idle
> > 61371 nobody 1 69 -10 384M 289M kqread 0 105:56 17.77% nginx
> > 61372 nobody 1 67 -10 384M 293M CPU0 0 106:15 16.99% nginx
> > 12 root 15 -60 - 0K 240K WAIT 0 54:50 0.00% intr
> >
> > 8.0 RC1 top -PSH:
> >
> > PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> > 11 root 171 ki31 0K 32K RUN 1 71.5H 81.05% {idle: cpu1}
> > 11 root 171 ki31 0K 32K CPU0 0 69.3H 69.19% {idle: cpu0}
> > 61372 nobody 68 -10 384M 294M kqread 0 107:06 18.99% nginx
> > 61371 nobody 68 -10 384M 291M kqread 0 106:45 16.99% nginx
> > 12 root -68 - 0K 240K WAIT 1 50:48 0.00% {irq19: bge0}
> > 17 root 44 - 0K 16K syncer 1 5:23 0.00% syncer
> > 12 root -32 - 0K 240K WAIT 1 3:06 0.00% {swi4: clock}
> >
> > 7.2-STABLE top -PS:
> >
> > CPU 0: 9.0% user, 0.0% nice, 7.9% system, 9.0% interrupt, 74.1% idle
> > CPU 1: 23.3% user, 0.0% nice, 8.3% system, 0.0% interrupt, 68.4% idle
> >
> > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> > 12 root 1 171 ki31 0K 16K RUN 0 275.0H 83.59% idle: cpu0
> > 11 root 1 171 ki31 0K 16K RUN 1 264.2H 76.27% idle: cpu1
> > 16109 nobody 1 68 -10 376M 307M CPU0 1 28:05 21.97% nginx
> > 16110 nobody 1 4 -10 376M 316M RUN 0 28:05 20.17% nginx
> > 26 root 1 -68 - 0K 16K WAIT 0 902:39 6.69% irq19: bge0
>
> How old is your 7.2-STABLE?
I saw this on 7.0-7.2. One of 7.2-S is, for example, from 2009.10.04.23.59.59.
I believe I saw the same CPU usage on FreeBSD-6 too.
--
Igor Sysoev
http://sysoev.ru/en/
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