linux-kernel - Re: [PATCH] perf/x86: Fix LLC-* and node-* events on Intel SandyBridge

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Date:	Mon, 23 Jul 2012 14:22:23 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	"Yan, Zheng" <yanzheng@...n.com>
Cc:	"Yan, Zheng" <zheng.z.yan@...el.com>, mingo@...e.hu,
	andi@...stfloor.org, linux-kernel@...r.kernel.org,
	Stephane Eranian <eranian@...il.com>
Subject: Re: [PATCH] perf/x86: Fix LLC-* and node-* events on Intel
 SandyBridge

On Sun, 2012-07-22 at 19:43 +0800, Yan, Zheng wrote:
> On Sat, Jul 21, 2012 at 12:48 AM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> > On Tue, 2012-07-17 at 17:27 +0800, Yan, Zheng wrote:
> >> From: "Yan, Zheng" <zheng.z.yan@...el.com>
> >>
> >> LLC-* and node-* events require using the OFFCORE_RESPONSE events
> >> on SandyBridge, but the hw_cache_extra_regs is left uninitialized.
> >> This patch adds the missing extra register configure table for
> >> SandyBridge.
> >
> > Last time I tried this I couldn't get sane numbers out of it..
> >
> > Does these encodings work, if so, do explain them.
> >
> 
> I have tested them and compared the results with Nehalme. I think
> they do work.

OK, great, thanks!

> > I guess I can take this as an 'official' publication of this fact?
> >
> > (I knew those bits meant this, but I never got a response if I could
> > publish that information.)
> >
> See chapter 18.8.7 of Intel 64 SDM Volume 3 (Order Number 325384)

D'0h, that's confusing.. I was staring at 18.8.5..
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