From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1767485AbXCIU0c (ORCPT ); Fri, 9 Mar 2007 15:26:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1767487AbXCIU0c (ORCPT ); Fri, 9 Mar 2007 15:26:32 -0500 Received: from mail07.syd.optusnet.com.au ([211.29.132.188]:34836 "EHLO mail07.syd.optusnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767485AbXCIU0b (ORCPT ); Fri, 9 Mar 2007 15:26:31 -0500 From: Con Kolivas To: Matt Mackall Subject: Re: 2.6.21-rc3-mm1 RSDL results Date: Sat, 10 Mar 2007 07:26:15 +1100 User-Agent: KMail/1.9.5 Cc: linux-kernel , akpm@linux-foundation.org References: <20070309053931.GA10459@waste.org> <20070309182744.GC10394@waste.org> <200703100715.39354.kernel@kolivas.org> In-Reply-To: <200703100715.39354.kernel@kolivas.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200703100726.15517.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Saturday 10 March 2007 07:15, Con Kolivas wrote: > On Saturday 10 March 2007 05:27, Matt Mackall wrote: > > On Fri, Mar 09, 2007 at 07:39:05PM +1100, Con Kolivas wrote: > > > On Friday 09 March 2007 19:20, Matt Mackall wrote: > > > > And I've just rebooted with NO_HZ and things are greatly improved. At > > > > idle, Beryl effects are silky smooth (possibly better than stock) and > > > > shows less load. Under 'make', Beryl is still responsive as is > > > > Galeon. No sign of lagging mouse or typing. > > > > > > > > Under make -j 5, things are intermittent. Galeon scrolling is > > > > sometimes still responsive, but Beryl, terminals and mouse still drag > > > > quite a bit. > > > > > > I just replied before you sent this one out I think our messages passed > > > each other across the ocean somewhere. I don't quite get what > > > combination of factors you're saying here caused great improvement. Was > > > it enabling NO_HZ on mainline cpu scheduler or disabling NO_HZ or on > > > RSDL? > > > > Turning on NO_HZ on RSDL greatly improved it. I have not tried NO_HZ > > on mainline. The first test was with NO_HZ=n, the second was with > > NO_HZ=y. > > How odd. I would have thought that if an interaction was to occur it would > have been without the new feature. Clearly what you describe without NO_HZ > is not the expected behaviour with RSDL. I wonder what went wrong. Are you > on 100HZ on that laptop? While I expect 100HZ should be ok, it might just > not be... My laptop is about the same performance and works fine with 100HZ > under load of all sorts BUT I don't have Beryl (which I would have thought > swayed things in the opposite direction also). Oh and can you grep dmesg for: Scheduler bitmap error If that occurs it's not performing properly. A subtle bug that's busting my chops to try and track down. -- -ck