linux-kernel - Re: [PATCH 1/4] perf: Add memory load/store events generic code

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Message-ID: <20110704215240.GG15637@one.firstfloor.org>
Date:	Mon, 4 Jul 2011 23:52:40 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Lin Ming <ming.m.lin@...el.com>, Ingo Molnar <mingo@...e.hu>,
	Andi Kleen <andi@...stfloor.org>,
	Stephane Eranian <eranian@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] perf: Add memory load/store events generic code

On Mon, Jul 04, 2011 at 01:16:32PM +0200, Peter Zijlstra wrote:
> On Mon, 2011-07-04 at 08:02 +0000, Lin Ming wrote:
> > +#define MEM_STORE_DCU_HIT              (1ULL << 0)
> 
> I'm pretty sure that's not Dublin City University, but what is it?
> Data-Cache-Unit? 

Yes

> what does that mean, L1/L2 or also L3? 

DCU is L1D

(L2 would be MLC, L3 is LLC in Intelnese)

> > +#define MEM_STORE_STLB_HIT             (1ULL << 1)
> 
> What's an sTLB? I know iTLB and dTLB's but sTLBs I've not heard of yet.

Second Level TLB (for both i and d)

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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