Re: [PATCH 2/5] perf, x86: Enable PDIR precise instruction profilingon IvyBridge

From: Stephane Eranian
Date: Thu Jul 05 2012 - 11:45:13 EST

On Tue, Jul 3, 2012 at 6:04 AM, Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:
>> 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.
You could simply add a check in the x86 init code like what is done
with the pebs events and precise mode.

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