linux-kernel - Re: [Bug #12650] Strange load average and ksoftirqd behavior with 2.6.29-rc2-git1

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Message-ID: <20090216104949.GA23976@localhost.localdomain>
Date:	Mon, 16 Feb 2009 11:49:49 +0100
From:	Damien Wyart <damien.wyart@...e.fr>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>
Subject: Re: [Bug #12650] Strange load average and ksoftirqd behavior with
	2.6.29-rc2-git1

> > > Does it find any TSC time warps?

> > Seems not.

> ok, it's indeed pretty conclusive:

> |  2 CPUs, running 2 parallel test-tasks.
> |  checking for time-warps via:
> |  - read time stamp counter (RDTSC) instruction (cycle resolution)
> | 
> |   | TSC: 0.32us, fail:0 |

> i suspect you ran it for at least a couple of minutes, and the ksoftirqd 
> anomaly occured during it, right?

Yes, that's right. I ran it for a few ten of minutes and the ksoftirqd
anomaly was occuring.

-- 
Damien
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