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

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Message-ID: <20090216092100.GH6182@elte.hu>
Date:	Mon, 16 Feb 2009 10:21:00 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Damien Wyart <damien.wyart@...e.fr>
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


* Damien Wyart <damien.wyart@...e.fr> wrote:

> > 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?

	Ingo
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