From: Peter Zijlstra <peterz@infradead.org>
To: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org
Subject: Re: Counting FP multiplies on Core 2
Date: Thu, 07 Jan 2010 09:30:33 +0100 [thread overview]
Message-ID: <1262853033.4049.80.camel@laptop> (raw)
In-Reply-To: <20100107045248.GB30718@drongo>
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.
prev parent reply other threads:[~2010-01-07 8:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-07 4:52 Counting FP multiplies on Core 2 Paul Mackerras
2010-01-07 8:30 ` Peter Zijlstra [this message]
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