linux-kernel - Re: [PATCH 2/5] perf, x86: Enable PDIR precise instruction profiling on IvyBridge

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Message-ID: <20120703040446.GJ11413@one.firstfloor.org>
Date:	Tue, 3 Jul 2012 06:04:46 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Andi Kleen <ak@...ux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andi Kleen <andi@...stfloor.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH 2/5] perf, x86: Enable PDIR precise instruction profiling on IvyBridge

> Well, the only way I can think of would be to request that the
> event be programmed with exclusive mode ALWAYS. That
> should not be to hard to add.

I suspect it would need some special callbacks from the events core,
that's why I only tried on IvyBridge.

Anyways, I'll drop it as the people in charge didn't approve of 
instruction sampling.

-Andi
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