linux-kernel - Re: [patch] cache-miss and cache-refs events on P6-mobile CPUs

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Date:	Tue, 11 Aug 2009 11:39:39 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Johannes Stezenbach <js@...21.net>, linux-kernel@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [patch] cache-miss and cache-refs events on P6-mobile CPUs

On Tue, 2009-08-11 at 11:34 +0200, Ingo Molnar wrote:

> @@ -116,8 +116,8 @@ static const u64 p6_perfmon_event_map[] 
>  {
>    [PERF_COUNT_HW_CPU_CYCLES]		= 0x0079,
>    [PERF_COUNT_HW_INSTRUCTIONS]		= 0x00c0,
> -  [PERF_COUNT_HW_CACHE_REFERENCES]	= 0x0000,
> -  [PERF_COUNT_HW_CACHE_MISSES]		= 0x0000,
> +  [PERF_COUNT_HW_CACHE_REFERENCES]	= 0x0f2e,
> +  [PERF_COUNT_HW_CACHE_MISSES]		= 0x012e,

2e is total numer of L2 events,

0f is all mesi states
01 is invalid states

Yes they are numbers, but no they are not full cache refs and misses.


I don't think this is a good patch.

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