Why is intr taking up so much cpu?
Dan Nelson
dnelson at allantgroup.com
Sun Jul 18 21:01:44 UTC 2010
In the last episode (Jul 18), Dan Nelson said:
> In the last episode (Jul 18), Doug Barton said:
> > On 07/18/10 12:41, Kostik Belousov wrote:
> > > When intr time starts accumulating again, try to do
> > > "procstat -kk <intr process pid>" and correlate the clock thread tid
> > > with the backtrace. Might be, it helps to guess what callouts are eating
> > > the CPU.
> >
> > Will do, thanks!
>
> You can also use dtrace to get a count of callouts and their time spent.
> Run this for a few seconds then hit ^C:
That may actually be too verbose (you'll get a histogram per callout). Try
the ones at http://wiki.freebsd.org/DTrace/Examples instead.
--
Dan Nelson
dnelson at allantgroup.com
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