Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763565AbXFKHhS (ORCPT ); Mon, 11 Jun 2007 03:37:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752394AbXFKHhH (ORCPT ); Mon, 11 Jun 2007 03:37:07 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:42686 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752184AbXFKHhF (ORCPT ); Mon, 11 Jun 2007 03:37:05 -0400 Date: Mon, 11 Jun 2007 09:36:34 +0200 From: Ingo Molnar To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, Thomas Gleixner , Dinakar Guniguntala Subject: Re: v2.6.21.4-rt11 Message-ID: <20070611073634.GB32446@elte.hu> References: <20070609210507.GA29194@elte.hu> <20070611011954.GG27982@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070611011954.GG27982@linux.vnet.ibm.com> User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.0.3 -2.0 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: 806 Lines: 19 * Paul E. McKenney wrote: > 2.6.21.4-rt12 boots on 4-CPU Opteron and passes several hours of > rcutorture. However, if I simply do "modprobe rcutorture", the kernel > threads do not spread across the CPUs as I would expect them to, even > given CFS. Instead, the readers all stack up on a single CPU, and I > have to use the "taskset" command to spread them out manually. Is > there some config parameter I am missing out on? hm, what affinity do they start out with? Could they all be pinned to CPU#0 by default? 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/