From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1767465AbXCISlL (ORCPT ); Fri, 9 Mar 2007 13:41:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1767464AbXCISlK (ORCPT ); Fri, 9 Mar 2007 13:41:10 -0500 Received: from waste.org ([66.93.16.53]:53899 "EHLO waste.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767465AbXCISlF (ORCPT ); Fri, 9 Mar 2007 13:41:05 -0500 Date: Fri, 9 Mar 2007 12:27:45 -0600 From: Matt Mackall To: Con Kolivas Cc: linux-kernel , akpm@linux-foundation.org Subject: Re: 2.6.21-rc3-mm1 RSDL results Message-ID: <20070309182744.GC10394@waste.org> References: <20070309053931.GA10459@waste.org> <20070309075358.GA10394@waste.org> <20070309082057.GB10394@waste.org> <200703091939.05535.kernel@kolivas.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200703091939.05535.kernel@kolivas.org> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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. My baseline test was with mainline NO_HZ=y. As an aside, we should not name config options NO_* or DISABLE_* because of the potential for double negation. -- Mathematics is the supreme nostalgia of our time.