From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933014AbXCFImo (ORCPT ); Tue, 6 Mar 2007 03:42:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933040AbXCFImo (ORCPT ); Tue, 6 Mar 2007 03:42:44 -0500 Received: from smtp23.orange.fr ([193.252.22.30]:7528 "EHLO smtp23.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933014AbXCFImn (ORCPT ); Tue, 6 Mar 2007 03:42:43 -0500 X-ME-UUID: 20070306084241444.6C6087008BEE@mwinf2329.orange.fr Subject: Re: [ck] Re: [ANNOUNCE] RSDL completely fair starvation free interactive cpu scheduler From: Xavier Bestel To: Con Kolivas Cc: Al Boldi , Markus =?ISO-8859-1?Q?T=F6rnqvist?= , ck list , linux-kernel@vger.kernel.org In-Reply-To: <200703060910.06343.kernel@kolivas.org> References: <200703042335.26785.a1426z@gawab.com> <200703052329.45217.kernel@kolivas.org> <200703052123.01095.a1426z@gawab.com> <200703060910.06343.kernel@kolivas.org> Content-Type: text/plain Date: Tue, 06 Mar 2007 09:42:34 +0100 Message-Id: <1173170554.5835.385.camel@frg-rhel40-em64t-03> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-27) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2007-03-06 at 09:10 +1100, Con Kolivas wrote: > Hah I just wish gears would go away. If I get hardware where it runs at just > the right speed it looks like it doesn't move at all. On other hardware the > wheels go backwards and forwards where the screen refresh rate is just > perfectly a factor of the frames per second (or something like that). > > This is not a cpu scheduler test and you're inferring that there are cpu > scheduling artefacts based on an application that has bottlenecks at > different places depending on the hardware combination. I'd add that Xorg has its own scheduler (for X11 operations, of course), that has its own quirks, and chances are that it is the one you're testing with glxgears. And as Con said, as long as glxgears does more FPS than your screen refresh rate, its flickering its completely meaningless: it doesn't even attempt to sync with vblank. Al, you'd better try with Quake3 or Nexuiz, or even Blender if you want to test 3D interactivity under load. Xav