From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161358AbXDXG5V (ORCPT ); Tue, 24 Apr 2007 02:57:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161364AbXDXG5V (ORCPT ); Tue, 24 Apr 2007 02:57:21 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:51889 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161358AbXDXG5U (ORCPT ); Tue, 24 Apr 2007 02:57:20 -0400 Date: Tue, 24 Apr 2007 08:57:09 +0200 From: Ingo Molnar To: Ed Tomlinson Cc: davidsen@posidon.tmr.com, "Kolivas, Con" , Linux Kernel M/L Subject: Re: [REPORT] First "glitch1" results, 2.6.21-rc7-git6-CFSv5 + SD 0.46 Message-ID: <20070424065709.GB19802@elte.hu> References: <462D2BDD.4040406@tmr.com> <200704231945.25613.edt@aei.ca> <200704231949.06108.edt@aei.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200704231949.06108.edt@aei.ca> User-Agent: Mutt/1.4.2.2i X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.1.7 -2.0 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 * Ed Tomlinson wrote: > > SD 0.46 1-2 FPS > > cfs v5 nice -19 219-233 FPS > > cfs v5 nice 0 1000-1996 > cfs v5 nice -10 60-65 FPS the problem is, the glxgears portion of this test is an _inverse_ testcase. The reason? glxgears on true 3D hardware will _not_ use X, it will directly use the 3D driver of the kernel. So by renicing X to -19 you give the xterms more chance to show stuff - the performance of the glxgears will 'degrade' - but that is what you asked for: glxgears is 'just another CPU hog' that competes with X, it's not a "true" X client. if you are after glxgears performance in this test then you'll get the best performance out of this by renicing X to +19 or even SCHED_BATCH. Ingo