Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755082Ab3EFRl4 (ORCPT ); Mon, 6 May 2013 13:41:56 -0400 Received: from mail-ob0-f169.google.com ([209.85.214.169]:65291 "EHLO mail-ob0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754978Ab3EFRlz (ORCPT ); Mon, 6 May 2013 13:41:55 -0400 MIME-Version: 1.0 In-Reply-To: <20130502073252.GG7521@dyad.programming.kicks-ass.net> References: <1367261108-9567-1-git-send-email-andi@firstfloor.org> <20130501090718.GA28253@dyad.programming.kicks-ass.net> <20130501111219.GF28253@dyad.programming.kicks-ass.net> <20130501191342.GH17814@two.firstfloor.org> <20130502073252.GG7521@dyad.programming.kicks-ass.net> Date: Mon, 6 May 2013 19:41:54 +0200 Message-ID: Subject: Re: [PATCH] perf, x86: Add workaround for MEM_*_RETIRED errata BV98 From: Stephane Eranian To: Peter Zijlstra Cc: Andi Kleen , "mingo@elte.hu" , LKML Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1093 Lines: 24 On Thu, May 2, 2013 at 9:32 AM, Peter Zijlstra wrote: > On Wed, May 01, 2013 at 09:21:55PM +0200, Stephane Eranian wrote: >> On Wed, May 1, 2013 at 9:13 PM, Andi Kleen wrote: >> >> Unfortunately, Andi's patch fails to correct the problem though >> >> it is the right approach. As he said, the problem is unfortunately >> > >> > perf stat -a / record -a / top will work. >> > >> But it does not for perf stat -a. Look at my example, run it on your machine. > > > Since nobody seems interested in explaining the exact nature of the hardware > failure I think the best thing we can do is simply blacklist these events. > > Broken hardware is broken after all -- we should jump through too many hoops > pretending its not. Problem is, those events are really important. We need to be able to measure them. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/