Messages in this thread | | | Date | Wed, 6 Jun 2012 07:12:47 -0700 | From | Andi Kleen <> | Subject | Re: [PATCH 1/5] perf, x86: Don't assume the alternative cycles encoding is architectural |
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On Wed, Jun 06, 2012 at 12:39:48PM +0200, Peter Zijlstra wrote: > On Tue, 2012-06-05 at 17:56 -0700, Andi Kleen wrote: > > From: Andi Kleen <ak@linux.intel.com> > > > > cycles:p uses an special cycles encoding by default. However that is not > > architectural, so it can only be used when the CPU is known > > (it already caused problems on Sandy Bridge). It may or may not work > > on future CPUs. > > > > So make it opt-in only. Right now I enabled it on Core2, Nehalem, Westmere > > and not on Sandy-Bridge or Atom. > > No.
What do you mean? Are you claiming it's architectural?
> Also, c0 is a PEBS capable event on Atom just fine.
Ok can enable it there.
-Andi
-- ak@linux.intel.com -- Speaking for myself only
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