linux-kernel - Re: Counting FP multiplies on Core 2

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Message-ID: <1262853033.4049.80.camel@laptop>
Date:	Thu, 07 Jan 2010 09:30:33 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: Counting FP multiplies on Core 2

On Thu, 2010-01-07 at 15:52 +1100, Paul Mackerras wrote:
> The Intel manual tells me that event num 12H, umask 00H on Core 2
> counts multiply operations executed, but says "Use IA32_PMC1 only".
> Is there a way in the raw event code to specify a particular PMC, or
> does the code just know that that event can only be counted on PMC1?

Right, this is what Stephane is trying to implement, but he's not very
fast.. maybe I should help him out.

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