Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932086Ab2JVRJU (ORCPT ); Mon, 22 Oct 2012 13:09:20 -0400 Received: from casper.infradead.org ([85.118.1.10]:56783 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755503Ab2JVRJT convert rfc822-to-8bit (ORCPT ); Mon, 22 Oct 2012 13:09:19 -0400 Message-ID: <1350925708.2768.106.camel@twins> Subject: Re: [PATCH v2 1/2] perf tools: add event modifier to request exclusive PMU access From: Peter Zijlstra To: Stephane Eranian Cc: Andi Kleen , LKML , "mingo@elte.hu" , Arnaldo Carvalho de Melo , Jiri Olsa Date: Mon, 22 Oct 2012 19:08:28 +0200 In-Reply-To: References: <1350912052-10066-1-git-send-email-eranian@google.com> <1350912052-10066-2-git-send-email-eranian@google.com> <20121022135358.GJ2095@tassilo.jf.intel.com> <20121022153952.GM2095@tassilo.jf.intel.com> <1350921565.2768.105.camel@twins> Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Evolution 3.2.2- Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 677 Lines: 15 On Mon, 2012-10-22 at 18:08 +0200, Stephane Eranian wrote: > > I'm still wondering if the avg user really thinks 'instructions' is > a > > useful metric for other than obtaining ipc measurements. > > > Yeah, for many users CPI (or IPC) is a useful metric. Right but you don't get that using instruction sampling, right? Or you need to pair it with a cycle count one way or another. And I don't really see PDIST helping with that. -- 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/