From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261165AbUJYNL5 (ORCPT ); Mon, 25 Oct 2004 09:11:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261517AbUJYNL4 (ORCPT ); Mon, 25 Oct 2004 09:11:56 -0400 Received: from dsl-kpogw5jd0.dial.inet.fi ([80.223.105.208]:35527 "EHLO safari.iki.fi") by vger.kernel.org with ESMTP id S261165AbUJYNLl (ORCPT ); Mon, 25 Oct 2004 09:11:41 -0400 Date: Mon, 25 Oct 2004 16:11:32 +0300 From: Sami Farin <7atbggg02@sneakemail.com> To: linux-kernel Mailing List Subject: Re: Linux 2.6.9 latencies: scheduler bug? Message-ID: <20041025131132.GD9917@m.safari.iki.fi> Mail-Followup-To: linux-kernel Mailing List References: <20041024212618.GA19377@m.safari.iki.fi> <20041025120021.GA9917@m.safari.iki.fi> <20041025125807.GA8432@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041025125807.GA8432@elte.hu> User-Agent: Mutt/1.5.6i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 25, 2004 at 02:58:07PM +0200, Ingo Molnar wrote: > > * Sami Farin <7atbggg02@sneakemail.com> wrote: > > > forget this stupid ip_tables.c patch, latencies have nothing to do with > > netfilter code, but bad interaction between xmms, rtc_latencytest > > and iptables. I now get at max 3.1s (yup, 3100000us) latencies. > > http://safari.iki.fi/2.6.9-xmms-fun-1.png > > if you want to reproduce this: > > 1) run "rtc_latencytest 1024" (can't reproduce with "rtc_latencytest 512") > > 2) press play in xmms > > 3) start iptables-script > > to further debug any latencies please apply the -RT patchset which includes also -mm1... > and enable PREEMPT_TIMING (and LATENCY_TRACING), that enables us to tell us more I guess those are not available as individual patches which could be applied to 2.6.9? Could someone with LATENCY_TRACING+PREEMPT_TIMING try to reproduce that xmms/rtc_latencytest/iptables thing... takes only a minute. Pretty please? > about the latencies. You dont have to enable PREEMPT_REALTIME (the most > experimental feature of the patchset) to measure latencies. > > Ingo --