Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752504Ab1DWHuq (ORCPT ); Sat, 23 Apr 2011 03:50:46 -0400 Received: from casper.infradead.org ([85.118.1.10]:57302 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752172Ab1DWHuc convert rfc822-to-8bit (ORCPT ); Sat, 23 Apr 2011 03:50:32 -0400 Subject: Re: [generalized cache events] Re: [PATCH 1/1] perf tools: Add missing user space support for config1/config2 From: Peter Zijlstra To: Andi Kleen Cc: Ingo Molnar , arun@sharma-home.net, Stephane Eranian , Arnaldo Carvalho de Melo , linux-kernel@vger.kernel.org, Lin Ming , Arnaldo Carvalho de Melo , Thomas Gleixner , eranian@gmail.com, Arun Sharma , Linus Torvalds , Andrew Morton In-Reply-To: <20110423000347.GC9328@tassilo.jf.intel.com> References: <20110422092322.GA1948@elte.hu> <20110422105211.GB1948@elte.hu> <20110422165007.GA18401@vps.sharma-home.net> <20110422203022.GA20573@elte.hu> <20110422203222.GA21219@elte.hu> <20110423000347.GC9328@tassilo.jf.intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Sat, 23 Apr 2011 09:50:12 +0200 Message-ID: <1303545012.2298.44.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1019 Lines: 24 On Fri, 2011-04-22 at 17:03 -0700, Andi Kleen wrote: > > > Yes, and note that with instructions events we even have skid-less PEBS > > > profiling so seeing the precise . > > - location of instructions is possible. > > It was better when it was eaten. PEBS does not actually eliminated > skid unfortunately. The interrupt still occurs later, so the > instruction location is off. > > PEBS merely gives you more information. You're so skilled at not actually saying anything useful. Are you perchance referring to the fact that the IP reported in the PEBS data is exactly _one_ instruction off? Something that is demonstrated to be fixable? Or are you defining skid differently and not telling us your definition? What are you saying? -- 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/