Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753440AbZKTIr3 (ORCPT ); Fri, 20 Nov 2009 03:47:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751661AbZKTIr2 (ORCPT ); Fri, 20 Nov 2009 03:47:28 -0500 Received: from courier.cs.helsinki.fi ([128.214.9.1]:56220 "EHLO mail.cs.helsinki.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750715AbZKTIr1 (ORCPT ); Fri, 20 Nov 2009 03:47:27 -0500 Message-ID: <4B0657A4.2040606@cs.helsinki.fi> Date: Fri, 20 Nov 2009 10:47:32 +0200 From: Pekka Enberg User-Agent: Thunderbird 2.0.0.23 (Macintosh/20090812) MIME-Version: 1.0 To: Ingo Molnar CC: Li Zefan , Arnaldo Carvalho de Melo , Frederic Weisbecker , Steven Rostedt , Peter Zijlstra , Eduard - Gabriel Munteanu , LKML , "linux-mm@kvack.org" Subject: Re: [RFC][PATCH 1/2] perf: Add 'perf kmem' tool References: <4B064AF5.9060208@cn.fujitsu.com> <20091120081440.GA19778@elte.hu> <84144f020911200019p4978c8e8tc593334d974ee5ff@mail.gmail.com> <20091120083053.GB19778@elte.hu> In-Reply-To: <20091120083053.GB19778@elte.hu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1048 Lines: 22 Ingo Molnar kirjoitti: > Regarding patch 2 - can we set some definitive benchmark threshold for > that? I.e. a list of must-have features in 'perf kmem' before we can do > it? 100% information and analysis equivalency with kmemtrace-user tool? I'd be interested to hear Eduard's comment on that. That said, I'll try to find some time to test "perf kmem" and provide feedback on that. I can ACK the patch when I'm happy with the output. :-) I'm mostly interested in two scenarios: (1) getting a nice report on worst fragmented call-sites (perf kmem needs symbol lookup) and (2) doing "perf kmem record" on machine A (think embedded here) and then "perf kmem report" on machine B. I haven't tried kmemtrace-user for a while but it did support both of them quite nicely at some point. Pekka -- 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/