Re: [Bugme-new] [Bug 8100] New: dynticks makes ksoftirqd1 use unreasonable amount of cpu time

From: Pavel Machek
Date: Fri Mar 09 2007 - 16:24:11 EST


Hi!

> bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote:
>
> > http://bugzilla.kernel.org/show_bug.cgi?id=8100
> >
> > Summary: dynticks makes ksoftirqd1 use unreasonable amount of cpu
> > time
> > Kernel Version: 2.6.21-rc2
> > Status: NEW
> > Severity: low
> > Owner: johnstul@xxxxxxxxxx
> > Submitter: jkarlson@xxxxxxxxx
> >
> >
> > Most recent kernel where this bug did *NOT* occur:
> > any kernel without dynticks
> >
> > Distribution:
> > Debian etch with linux-2.6.21-rc{2,1}
> >
> > Hardware Environment:
> > Macbook core2 with bios emulation
> >
> > Software Environment:
> > The problem is obvious when listening to shoutcast stream with kmplayer and
> > artsd via wi-fi with wpa (wpa_supplicant)
> >
> > Problem Description:
> > ksoftirqd1 uses ~30% cpu-time (by top) no other symptoms, while
> > without dyntikcs cpu-load in similar circumstances is negligible.
> > This might be a dynticks feature rather than bug.

top lies. top has always lied, now it lies more. Do not trust top.
RESOLVED/INVALID?

Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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