linux-kernel - Re: [PATCH 1/5] perf, x86: Don't assume the alternative cycles encoding is architectural

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Date:	Wed, 6 Jun 2012 19:48:12 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Andi Kleen <andi@...stfloor.org>, Andi Kleen <ak@...ux.intel.com>,
	linux-kernel@...r.kernel.org, eranian@...gle.com
Subject: Re: [PATCH 1/5] perf, x86: Don't assume the alternative cycles encoding is architectural

On Wed, Jun 06, 2012 at 07:10:45PM +0200, Peter Zijlstra wrote:
> On Wed, 2012-06-06 at 18:08 +0200, Andi Kleen wrote:
> > How about newer unknown Intel CPUs with arch_perfmon >= 3? Those would get 
> > intel_pmu, correct?  There's no guarantee that they support the trick.
> 
> But they will have no PEBS constraints set, so effectively don't have
> PEBS.

Ok. I see you want to do it tricky instead of obvious.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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