From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754492AbbBZUeG (ORCPT ); Thu, 26 Feb 2015 15:34:06 -0500 Received: from mga01.intel.com ([192.55.52.88]:55881 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754462AbbBZUeF (ORCPT ); Thu, 26 Feb 2015 15:34:05 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,654,1418112000"; d="scan'208";a="460007801" Date: Thu, 26 Feb 2015 12:34:04 -0800 From: Andi Kleen To: Arnaldo Carvalho de Melo Cc: kan.liang@intel.com, jolsa@redhat.com, namhyung@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V7 1/1] perf tool:perf diff support for different binaries Message-ID: <20150226203404.GF27767@tassilo.jf.intel.com> References: <1423460384-11645-1-git-send-email-kan.liang@intel.com> <20150226151751.GD13373@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150226151751.GD13373@kernel.org> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Having a nice explanation of the problem helps, as my first reaction to > this patch was: "What? This is what this tool is supposed to do, to > compare two versions of a binary, one that is being developed from the > same source, the other with slight modifications, etc", while the > description of the patch made it look as this was a feature that was now > being introduced. AFAIK it was actually to compare multiple runs of the same binary with different setups: e.g. varying number of threads. However in the Linux kernel development world it turns out comparing multiple similar binaries is much more useful. -Andi -- ak@linux.intel.com -- Speaking for myself only