linux-kernel - Re: perf user tool precise attribute broken in 3.5rc1+

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Message-ID: <20120608165319.GC27374@one.firstfloor.org>
Date:	Fri, 8 Jun 2012 18:53:19 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Stephane Eranian <eranian@...gle.com>, jolsa@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: perf user tool precise attribute broken in 3.5rc1+

On Fri, Jun 08, 2012 at 12:48:14PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Jun 08, 2012 at 05:10:09AM +0200, Andi Kleen escreveu:
> > > Are you sure the old one works? Perhaps it silently falls back to
> > > cpu-clock?
>  
> > Yes i'm sure. I was actually debugging some kernel pebs code,
> > and had a heavily instrumented pebs code path and was first trying
> > to figure out what went wrong in the kernel, until I realized 
> > that the userland was broken.
> > 
> > Does :p work for anyone else?
> 
> It seems to work for Linus on Ivy Bridge with what is on tip/perf/urgent

Hmm, maybe some local problem. I'll do some debugging and a bisect.

-Andi
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