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Date: Thu, 24 Feb 2011 15:02:15 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Lin Ming <ming.m.lin@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>, Ingo Molnar <mingo@elte.hu>,
        Stephane Eranian <eranian@google.com>,
        Andi Kleen <andi@firstfloor.org>,
        linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -tip] perf: x86, add SandyBridge support
Message-ID: <20110224140214.GI5818@one.firstfloor.org>
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> +	[ C(OP_READ) ] = {
> +		[ C(RESULT_ACCESS) ] = 0x04d1, /* MEM_LOAD_UOPS_RETIRED.LLC_HIT */
> +		[ C(RESULT_MISS)   ] = 0x0,
> +	},
> +	[ C(OP_WRITE) ] = {
> +		[ C(RESULT_ACCESS) ] = 0x0424, /* L2_RQSTS.RFO_HITS */
> +		[ C(RESULT_MISS)   ] = 0x0824, /* L2_RQSTS.RFO_MISS */

No! You really need offcore here. L2 is not LLC!!!
See the offcore patchkit which fixes this for Nehalem.

-Andi