Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762267AbZLKCuZ (ORCPT ); Thu, 10 Dec 2009 21:50:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762225AbZLKCuZ (ORCPT ); Thu, 10 Dec 2009 21:50:25 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:62251 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762197AbZLKCuY (ORCPT ); Thu, 10 Dec 2009 21:50:24 -0500 X-Authority-Analysis: v=1.0 c=1 a=aH5DXaW3jXgA:10 a=7U3hwN5JcxgA:10 a=Xu_aML22AAAA:8 a=k93riptPOP-vjxGzZkoA:9 a=mUU1_EjqX81UgPQhmQ_IWb6brqcA:4 X-Cloudmark-Score: 0 X-Originating-IP: 74.67.89.75 Subject: Re: [PATCH 0/4] ftrace - Add function duration tracer to ftrace From: Steven Rostedt Reply-To: rostedt@goodmis.org To: Tim Bird Cc: "Bird, Tim" , linux kernel , Ingo Molnar , Frederic Weisbecker In-Reply-To: <4B21584B.6010405@am.sony.com> References: <4B202753.4010108@am.sony.com> <1260416495.2146.130.camel@gandalf.stny.rr.com> <4B21584B.6010405@am.sony.com> Content-Type: text/plain; charset="ISO-8859-15" Organization: Kihon Technologies Inc. Date: Thu, 10 Dec 2009 21:50:29 -0500 Message-ID: <1260499829.2146.328.camel@gandalf.stny.rr.com> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1326 Lines: 33 On Thu, 2009-12-10 at 12:21 -0800, Tim Bird wrote: > It may be moot, given the ensuing discussion (which I'll respond to > shortly), but here's a link to an uncorrupted version: > > http://elinux.org/images/3/3e/Measuring-function-duration-with-ftrace-october-2009.pdf I just read your presentation, and I like it :-) I still feel that we don't want to add another plugin, but as I also stated, I don't want to stop improving on the current plugins until we have a better alternative. Would it be possible in making this an trace option (for now). And then the function graph tracer would just morph into this duration tracer. No added plugin, but just an option. I do see value in this, and I don't want to keep it from making it into 34 just because we plan to some day phase out the plugins. There's too many times we try to go for broke and end up with nothing at the end. This is why it took so long for streamline_config to make it in. Just make any tools that interface with this flexible, (abstract layer) so that if this does change the tools can cope. -- Steve -- 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/