Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759665AbXENX53 (ORCPT ); Mon, 14 May 2007 19:57:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756382AbXENX5X (ORCPT ); Mon, 14 May 2007 19:57:23 -0400 Received: from holomorphy.com ([66.93.40.71]:54449 "EHLO holomorphy.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755289AbXENX5W (ORCPT ); Mon, 14 May 2007 19:57:22 -0400 Date: Mon, 14 May 2007 16:57:59 -0700 From: William Lee Irwin III To: Ingo Molnar Cc: Srivatsa Vaddagiri , efault@gmx.de, tingy@cs.umass.edu, linux-kernel@vger.kernel.org Subject: Re: fair clock use in CFS Message-ID: <20070514235759.GN31925@holomorphy.com> References: <20070514083358.GA29775@in.ibm.com> <20070514102929.GL31925@holomorphy.com> <20070514103120.GA23766@elte.hu> <20070514110500.GV19966@holomorphy.com> <20070514112259.GC28348@in.ibm.com> <20070514112016.GW19966@holomorphy.com> <20070514120405.GA3364@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070514120405.GA3364@elte.hu> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1388 Lines: 30 * William Lee Irwin III wrote: >> [...] I'm suspicious of EEVDF's timekeeping now as well. On Mon, May 14, 2007 at 02:04:05PM +0200, Ingo Molnar wrote: > well, EEVDF is a paper-only academic scheduler, one out of thousands > that never touched real hardware. For nearly every mathematically > possible scheduling algorithm i suspect there's at least one paper out > there already describing it ;-) But this time the EEVDF paper got it > right and you got it wrong. But really, if you want to make an impact on > how CFS looks like then please try it and send test feedback and/or > patches - not words. =B-) Perhaps the paper was inspired by preexisting code. Perhaps the code dated back to the 70's. The weight consistency testcase is largely done on account of Davide Libenzi's already having written such a load generator apart from incorporating the already-written code to postprocess the results. I have no particular need to rely on the cfs patches for whatever scheduler patches I'd care to write. I suppose I could write some if I feel particularly inspired. Code review is not my forte anyway. -- wli - 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/