linux-kernel - Re: Funny perf

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Date:	Wed, 23 Feb 2011 13:29:04 +0100
From:	Borislav Petkov <bp@...64.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Borislav Petkov <bp@...64.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Funny perf

On Wed, Feb 23, 2011 at 05:21:48AM -0500, Peter Zijlstra wrote:
> On Thu, 2011-02-17 at 19:26 +0100, Borislav Petkov wrote:
> > 
> > so this looks like some of the samples do not belong in the perf.data
> > output with that garbled cpu field. It lets me also assume that the
> > sample->time field is also crap so the timestamp check is falsely
> > tripped. 
> 
> Most interesting, I haven't tried to reproduce, but it does sound
> smelly.
> 
> I did have a quick peek at some code I suspected but that all seems in
> order. I guess someone will have to sit down and figure this out proper,
> if nobody steps up I guess it'll have to be me, but that also means it
> might take a while since I've got some other pending stuff to stare at
> before this :/

Same here, I'll try to play with this a bit more when I get a free
window. I think the first step should be if someone else tries
reproducing this to see whether it really is reproducible or there's
something wrong with my setup.

Thanks.

-- 
Regards/Gruss,
Boris.

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