Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761107AbXH1UrF (ORCPT ); Tue, 28 Aug 2007 16:47:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753193AbXH1Uqy (ORCPT ); Tue, 28 Aug 2007 16:46:54 -0400 Received: from turing-police.cc.vt.edu ([128.173.14.107]:53370 "EHLO turing-police.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752345AbXH1Uqx (ORCPT ); Tue, 28 Aug 2007 16:46:53 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.2 To: Linus Torvalds Cc: Al Boldi , Ingo Molnar , Peter Zijlstra , Mike Galbraith , Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: CFS review In-Reply-To: Your message of "Mon, 27 Aug 2007 22:05:37 PDT." From: Valdis.Kletnieks@vt.edu References: <200708111344.42934.a1426z@gawab.com> <200708271746.47685.a1426z@gawab.com> <20070827204116.GA12495@elte.hu> <200708280737.53439.a1426z@gawab.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1188334665_3159P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Tue, 28 Aug 2007 16:46:08 -0400 Message-ID: <14311.1188333968@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1604 Lines: 49 --==_Exmh_1188334665_3159P Content-Type: text/plain; charset=us-ascii On Mon, 27 Aug 2007 22:05:37 PDT, Linus Torvalds said: > > > On Tue, 28 Aug 2007, Al Boldi wrote: > > > > No need for framebuffer. All you need is X using the X.org vesa-driver. > > Then start gears like this: > > > > # gears & gears & gears & > > > > Then lay them out side by side to see the periodic stallings for ~10sec. > > I don't think this is a good test. > > Why? > > If you're not using direct rendering, what you have is the X server doing > all the rendering, which in turn means that what you are testing is quite > possibly not so much about the *kernel* scheduling, but about *X-server* > scheduling! I wonder - can people who are doing this as a test please specify whether they're using an older X that has the libX11 or the newer libxcb code? That may have a similar impact as well. (libxcb is pretty new - it landed in Fedora Rawhide just about a month ago, after Fedora 7 shipped. Not sure what other distros have it now...) --==_Exmh_1188334665_3159P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFG1ImQcC3lWbTT17ARAqc1AJ4hU1D9OS3uZgXTJBeHx6izl+HEtQCgqZxP I0hfqqjkVb9a58tkrXB7qu4= =0rP7 -----END PGP SIGNATURE----- --==_Exmh_1188334665_3159P-- - 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/