linux-kernel - Re: [PATCH 06/12] perf/x86-ibs: Precise event sampling with IBS for AMD CPUs

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Message-ID: <20120427160922.GI18810@erda.amd.com>
Date:	Fri, 27 Apr 2012 18:09:22 +0200
From:	Robert Richter <robert.richter@....com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Stephane Eranian <eranian@...gle.com>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/12] perf/x86-ibs: Precise event sampling with IBS for
 AMD CPUs

On 27.04.12 17:30:33, Peter Zijlstra wrote:
> On Fri, 2012-04-27 at 14:54 +0200, Robert Richter wrote:
> > My suggestions was to use level 1 for all samples and level 2 for
> > samples that only contain a precise rip, saving level 3 for future
> > use. 
> 
> No.

Ok, will look how to handle this in userspace.

But do you agree to have level 1 and 2 mapped to ibs, not just only
level 2 (since I don't want to fail with r076:p)?

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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