Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763602AbXFKBUM (ORCPT ); Sun, 10 Jun 2007 21:20:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760073AbXFKBT7 (ORCPT ); Sun, 10 Jun 2007 21:19:59 -0400 Received: from e6.ny.us.ibm.com ([32.97.182.146]:60199 "EHLO e6.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759038AbXFKBT6 (ORCPT ); Sun, 10 Jun 2007 21:19:58 -0400 Date: Sun, 10 Jun 2007 18:19:54 -0700 From: "Paul E. McKenney" To: Ingo Molnar 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: <20070611011954.GG27982@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20070609210507.GA29194@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070609210507.GA29194@elte.hu> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1554 Lines: 35 On Sat, Jun 09, 2007 at 11:05:07PM +0200, Ingo Molnar wrote: > > i'm pleased to announce the v2.6.21.4-rt11 kernel, which can be > downloaded from the usual place: > > http://people.redhat.com/mingo/realtime-preempt/ > > more info about the -rt patchset can be found in the RT wiki: > > http://rt.wiki.kernel.org > > -rt11 is a bit more experimental than usual: it includes the CFS > scheduler. Several people have suggested the inclusion of CFS into the > -rt tree: the determinism of the CFS scheduler is a nice match to the > determinism offered by PREEMPT_RT. The port of CFS to -rt was done by > Dinakar Guniguntala. Tested on i686 and x86_64. > > to build a 2.6.21.4-rt11 tree, the following patches should be applied: > > http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.21.4.tar.bz2 > http://people.redhat.com/mingo/realtime-preempt/patch-2.6.21.4-rt11 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? Thanx, Paul - 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/