Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262485AbUJ0PQ6 (ORCPT ); Wed, 27 Oct 2004 11:16:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262491AbUJ0PQ5 (ORCPT ); Wed, 27 Oct 2004 11:16:57 -0400 Received: from mail4.utc.com ([192.249.46.193]:39347 "EHLO mail4.utc.com") by vger.kernel.org with ESMTP id S262485AbUJ0PQX (ORCPT ); Wed, 27 Oct 2004 11:16:23 -0400 Message-ID: <417FBBB7.3070200@cybsft.com> Date: Wed, 27 Oct 2004 10:16:07 -0500 From: "K.R. Foley" Organization: Cybersoft Solutions, Inc. User-Agent: Mozilla Thunderbird 0.8 (X11/20040913) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Ingo Molnar CC: linux-kernel@vger.kernel.org, Lee Revell , Rui Nuno Capela , Mark_H_Johnson@Raytheon.com, Bill Huey , Adam Heath , Florian Schmidt , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Andrew Morton Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0 References: <20041022155048.GA16240@elte.hu> <20041022175633.GA1864@elte.hu> <20041025104023.GA1960@elte.hu> <417D4B5E.4010509@cybsft.com> <20041025203807.GB27865@elte.hu> <417E2CB7.4090608@cybsft.com> <20041027002455.GC31852@elte.hu> <417F16BB.3030300@cybsft.com> <20041027132926.GA7171@elte.hu> <417FB7F0.4070300@cybsft.com> <20041027150548.GA11233@elte.hu> In-Reply-To: <20041027150548.GA11233@elte.hu> X-Enigmail-Version: 0.86.1.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1036 Lines: 34 Ingo Molnar wrote: > * K.R. Foley wrote: > > >>I use the rtc-debug and amlat to generate histograms of latencies >>which is what I was trying to do when I found the rtc problem the >>first time. I believe that rtc-debug/amlat is much more accurate for >>generating histograms of latencies than realfeel is because the >>instrumentation is in the kernel rather than a userspace program. > > > ah, ok - nice. So rtc-debug+amlat is the only known-reliable way to > produce latency histograms? Don't know that for sure, but it is the most reliable way that I am aware of. > > Btw., rtc-debug's latency results could now be cross-validated with > -V0.4's wakeup tracer (and vice versa), because the two are totally > independent mechanisms. Agreed. :) > > Ingo > kr - 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/