linux-kernel - Re: [GIT PULL] perf changes for v3.8

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Date:	Wed, 12 Dec 2012 20:25:16 -0700
From:	David Ahern <dsahern@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Ingo Molnar <mingo@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] perf changes for v3.8

On 12/12/12 7:53 PM, Linus Torvalds wrote:
> Hmm. This may be entirely unrelated to this particular pull request, but
>
>     perf record -e cycles:pp
>
> no longer works on my westmere machine (Operation not supported). It
> used to work, but I haven't tried to bisect it, since I hope somebody
> will just go "oh, I know what's up".

One last "I may know what's up" question. I wonder if you are tripping 
on this:

     if (event->attr.precise_ip) {
         int precise = 0;

         if (!event->attr.exclude_guest)
             return -EOPNOTSUPP;

Are you running an older perf binary on the 3.8 kernel?

Does this work: perf record -e cycles:ppH  ...

David
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