linux-kernel - Re: x86 perf's dTLB-load-misses broken on IvyBridge? II

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Message-ID: <20140219155432.GN15586@twins.programming.kicks-ass.net>
Date:	Wed, 19 Feb 2014 16:54:32 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Dave Hansen <dave.hansen@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: Re: x86 perf's dTLB-load-misses broken on IvyBridge? II

On Wed, Feb 19, 2014 at 07:40:36AM -0800, Andi Kleen wrote:
> > >  [ C(DTLB) ] = {
> > >         [ C(OP_READ) ] = {
> > >                 [ C(RESULT_ACCESS) ] = 0x81d0, /* MEM_UOP_RETIRED.ALL_LOADS */
> > >                 [ C(RESULT_MISS)   ] = 0x0108, /* DTLB_LOAD_MISSES.CAUSES_A_WALK */
> > >         },
> 
> 
> Actually I tested on the wrong system earlier, sorry The miss event code 
> is wrong on IvyBridge, it should be 0x8108 (DTLB_LOAD_MISSES.DEMAND_LD_MISS_CAUSES_A_WALK),
> not 0x0108.

Ah indeed, that is different between snb and ivb.
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