Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758052AbXIZJrn (ORCPT ); Wed, 26 Sep 2007 05:47:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754621AbXIZJrd (ORCPT ); Wed, 26 Sep 2007 05:47:33 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:48398 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754068AbXIZJrc (ORCPT ); Wed, 26 Sep 2007 05:47:32 -0400 Date: Wed, 26 Sep 2007 11:47:26 +0200 From: Ingo Molnar To: Martin Michlmayr Cc: Srivatsa Vaddagiri , linux-kernel@vger.kernel.org Subject: Re: Network slowdown due to CFS Message-ID: <20070926094726.GA27006@elte.hu> References: <20070926085202.GE3337@deprecation.cyrius.com> <20070926093445.GA24768@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070926093445.GA24768@elte.hu> User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.1.7-deb -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 905 Lines: 23 * Ingo Molnar wrote: > > What kind of information can I supply so you can track this down? > > as a starter, could you boot the sched-devel.git kernel, with > CONFIG_SCHED_DEBUG=y and CONFIG_SCHEDSTATS=y enabled and could you run > this script while the iperf test is in the middle of its testrun: > > http://people.redhat.com/mingo/cfs-scheduler/tools/cfs-debug-info.sh > > this will gather a good deal of info about the workload in question. > Please send me the resulting debug file. Another thing: please also do the same with the vanilla v2.6.22 kernel, and send me that file too. (so that the two cases can be compared) Ingo - 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/