Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932604AbXH2IEt (ORCPT ); Wed, 29 Aug 2007 04:04:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754174AbXH2IEe (ORCPT ); Wed, 29 Aug 2007 04:04:34 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:51953 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753832AbXH2IEd (ORCPT ); Wed, 29 Aug 2007 04:04:33 -0400 Date: Wed, 29 Aug 2007 10:04:18 +0200 From: Ingo Molnar To: Keith Packard Cc: Al Boldi , Peter Zijlstra , Mike Galbraith , Andrew Morton , Linus Torvalds , linux-kernel@vger.kernel.org Subject: Re: CFS review Message-ID: <20070829080417.GB19386@elte.hu> References: <200708111344.42934.a1426z@gawab.com> <200708271746.47685.a1426z@gawab.com> <20070827204116.GA12495@elte.hu> <200708280737.53439.a1426z@gawab.com> <20070829041827.GA8733@elte.hu> <1188361749.21502.123.camel@koto.keithp.com> <20070829044614.GA13225@elte.hu> <1188374249.21502.155.camel@koto.keithp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1188374249.21502.155.camel@koto.keithp.com> User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.1.7-deb -1.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1297 Lines: 35 * Keith Packard wrote: > Make sure the X server isn't running with the smart scheduler > disabled; that will cause precisely the symptoms you're seeing here. > In the normal usptream sources, you'd have to use '-dumbSched' as an X > server command line option. > > The old 'scheduler' would run an entire X client's input buffer dry > before looking for requests from another client. Because glxgears > requests are small but time consuming, this can cause very long delays > between client switching. on the old box where i've reproduced this i've got an ancient X version: neptune:~> X -version X Window System Version 6.8.2 Release Date: 9 February 2005 X Protocol Version 11, Revision 0, Release 6.8.2 Build Operating System: Linux 2.6.9-22.ELsmp i686 [ELF] is that old enough to not have the smart X scheduler? on newer systems i dont see correctly updated glxgears output (probably the GLX bug you mentioned) so i cannot reproduce the bug. Al, could you send us your 'X -version' output? Ingo - 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/