Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161211AbWJXUoK (ORCPT ); Tue, 24 Oct 2006 16:44:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965188AbWJXUoK (ORCPT ); Tue, 24 Oct 2006 16:44:10 -0400 Received: from iriserv.iradimed.com ([69.44.168.233]:7004 "EHLO iradimed.com") by vger.kernel.org with ESMTP id S965187AbWJXUoI (ORCPT ); Tue, 24 Oct 2006 16:44:08 -0400 Message-ID: <453E7B1F.7020602@cfl.rr.com> Date: Tue, 24 Oct 2006 16:44:15 -0400 From: Phillip Susi User-Agent: Thunderbird 1.5.0.7 (Windows/20060909) MIME-Version: 1.0 To: Martin Peschke CC: Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [Patch 0/5] I/O statistics through request queues References: <1161435423.3054.111.camel@dyn-9-152-230-71.boeblingen.de.ibm.com> <453D0C62.4030601@cfl.rr.com> <453E39B0.2000800@de.ibm.com> In-Reply-To: <453E39B0.2000800@de.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 24 Oct 2006 20:44:21.0892 (UTC) FILETIME=[2F23DC40:01C6F7AD] X-TM-AS-Product-Ver: SMEX-7.2.0.1122-3.6.1039-14772.000 X-TM-AS-Result: No--3.773100-5.000000-31 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 714 Lines: 16 Martin Peschke wrote: > Well, the instrumentation "on demand" aspect is half of the truth. > A probe inserted through kprobes impacts performance more than static > instrumentation. True, but given that there are going to be a number of things you might want to instrument at some point, and that at any given time you might only be interested in a few of those, it likely will be better overall to spend some more time only on the few than less time on the many. - 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/