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Date: Wed, 19 Feb 2014 07:40:36 -0800
From: Andi Kleen <ak@linux.intel.com>
To: Dave Hansen <dave.hansen@linux.intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Subject: Re: x86 perf's dTLB-load-misses broken on IvyBridge? II
Message-ID: <20140219154036.GX12219@tassilo.jf.intel.com>
References: <5303E8BF.9030107@linux.intel.com>
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> >  [ 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.

BTW that event only counts demand loads, no prefetches, that would be a separate event.

dTLB-loads works with and without PEBS.


-Andi