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

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Date:	Wed, 12 Dec 2012 18:53:36 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	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

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".

dmesg says:

  Performance Events: PEBS fmt1+, 16-deep LBR, Westmere events, Intel
PMU driver.
  perf_event_intel: CPUID marked event: 'bus cycles' unavailable
  ... version:                3
  ... bit width:              48
  ... generic registers:      4
  ... value mask:             0000ffffffffffff
  ... max period:             000000007fffffff
  ... fixed-purpose events:   3
  ... event mask:             000000070000000f

Any ideas?

              Linus
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