From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752839AbXCES3K (ORCPT ); Mon, 5 Mar 2007 13:29:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752844AbXCES3K (ORCPT ); Mon, 5 Mar 2007 13:29:10 -0500 Received: from proxima.lp0.eu ([85.158.45.36]:58171 "EHLO proxima.lp0.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752839AbXCES3J (ORCPT ); Mon, 5 Mar 2007 13:29:09 -0500 Message-ID: <45EC616F.6090809@simon.arlott.org.uk> Date: Mon, 05 Mar 2007 18:29:03 +0000 From: Simon Arlott User-Agent: Thunderbird 1.5.0.5 (X11/20060819) MIME-Version: 1.0 To: Con Kolivas CC: ck list , linux-kernel@vger.kernel.org Subject: Re: [ANNOUNCE] RSDL completely fair starvation free interactive cpu scheduler References: <200703042335.26785.a1426z@gawab.com> <200703050849.29674.kernel@kolivas.org> <45EB45F7.3050208@simon.arlott.org.uk> <200703050927.52563.kernel@kolivas.org> In-Reply-To: <200703050927.52563.kernel@kolivas.org> X-Enigmail-Version: 0.94.1.2 OpenPGP: id=89C93563 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 04/03/07 22:27, Con Kolivas wrote: > On Monday 05 March 2007 09:19, Simon Arlott wrote: >> If I run glxgears, thunderbird/firefox become really slow to >> respond/display and cpu usage isn't even at 100%. I had thunderbird lagging >> on keyboard character repeat earlier but can't reproduce that now even with >> glxgears - however firefox lags really badly on keyboard input with >> glxgears running. > > Hi Simon > > You're hitting a nasty udev bug here that is unrelated to the cpu scheduler Yes, I've already reported this. > and almost certainly responsible for your bad behaviour. What? How do you make the leap from lockdep output on boot to my experience of slow interactive response? > Also this patch was actually for 2.6.20 and you seem to have applied it to > 2.6.21-rc2. I haven't even checked that it cleanly applies to that kernel. It doesn't, a one line fix from Ingo conflicts (and a comment that was changed). 7355690ead6d61f6344072ae61060f985060da29 [PATCH] sched: fix SMT scheduler bug 72fd4a35a824331d7a0f4168d7576502d95d34b3 [PATCH] Numerous fixes to kernel-doc info in source files. I have reverted your patch and the laggy behaviour remains when running glxgears (in fact it seems a bit worse), I don't know about the thunderbird lag while typing since I can't easily reproduce it but I don't recall it ever happening before. So, your patch isn't the cause of a serious slowdown when running glxgears in the background (although it doesn't improve the situation much). It looks like it just slows down X in general rather than using much CPU. -- Simon Arlott