linux-kernel - Re: [PATCH 2/2] perf, x86: Don't allow unusual PEBS raw flags

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Message-ID: <CABPqkBQy04g22jdSr=+zJzeBpnneacauq4i=p7GdJp+w_C9Jzg@mail.gmail.com>
Date:	Tue, 30 Apr 2013 01:05:09 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>, stable@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 2/2] perf, x86: Don't allow unusual PEBS raw flags

On Tue, Apr 30, 2013 at 12:34 AM, Andi Kleen <ak@...ux.intel.com> wrote:
>> Could you explain why those listed in the aliases avoid that problem?
>
> The aliases are widely used now (by perf), so as a special case are expected
> to work now (at least as long as we enable it by model number)
>
I don't get that.

uops_retired:cmask=16:i with precise=2 does not measure
that based on your comments. It measures uops_retired
if the filters are ignored with PEBS.
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