Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757354AbYBIAa5 (ORCPT ); Fri, 8 Feb 2008 19:30:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753217AbYBIAau (ORCPT ); Fri, 8 Feb 2008 19:30:50 -0500 Received: from lixom.net ([66.141.50.11]:45202 "EHLO mail.lixom.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754272AbYBIAat (ORCPT ); Fri, 8 Feb 2008 19:30:49 -0500 Date: Fri, 8 Feb 2008 18:32:20 -0600 From: Olof Johansson To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Peter Zijlstra Subject: Re: Scheduler(?) regression from 2.6.22 to 2.6.24 for short-lived threads Message-ID: <20080209003220.GA21395@lixom.net> References: <20080209000456.GA21021@lixom.net> <20080209000829.GA29986@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080209000829.GA29986@elte.hu> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 867 Lines: 26 On Sat, Feb 09, 2008 at 01:08:30AM +0100, Ingo Molnar wrote: > > * Olof Johansson wrote: > > > 2.6.22: 3332 ms > > 2.6.23: 4397 ms > > 2.6.24: 8953 ms > > 2.6.24-git19: 8986 ms > > if you enable SCHED_DEBUG, and subtract 4 from the value of > /proc/sys/kernel/sched_features, does it get any better? > > if not, does writing 0 into /proc/sys/kernel/sched_features have any > impact? Doesn't seem to make a difference, either of them. I can unfortunately not retest on x86 at the moment, only powerpc. But it made no noticable difference in runtime w/ pasemi_defconfig and current mainline. -Olof -- 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/