linux-kernel - Re: [BISECTED] Lots of "rescheduling IPIs" in powertop

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Date:	Tue, 13 May 2008 22:54:40 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Vegard Nossum <vegard.nossum@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	S.Çağlar Onur <caglar@...dus.org.tr>,
	Valdis.Kletnieks@...edu, Matt Mackall <mpm@...enic.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [BISECTED] Lots of "rescheduling IPIs" in powertop

Vegard Nossum <vegard.nossum@...il.com> writes:
>
> This initially showed up on my 2.6.24.5-85.fc8 (Fedora) kernel.
>
> I have two different systems (one laptop, one desktop) which both show the
> same symptoms, please do tell me if you need any more info.

What CPUs do they have?  And does the problem really go away when
you boot with idle=mwait ? And what does the following program 
output? 

#include <asm/msr.h>

main()
{
        printf("%x\n", cpuid_edx(5));
}

-Andi
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