From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030963AbXDPVCH (ORCPT ); Mon, 16 Apr 2007 17:02:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030965AbXDPVCH (ORCPT ); Mon, 16 Apr 2007 17:02:07 -0400 Received: from ns.suse.de ([195.135.220.2]:39414 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030963AbXDPVCE (ORCPT ); Mon, 16 Apr 2007 17:02:04 -0400 To: Ingo Molnar Cc: linux-kernel@vger.kernel.org Subject: Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS] References: <20070413202100.GA9957@elte.hu> From: Andi Kleen Date: 17 Apr 2007 00:00:07 +0200 In-Reply-To: <20070413202100.GA9957@elte.hu> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ingo Molnar writes: > [announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS] > > i'm pleased to announce the first release of the "Modular Scheduler Core > and Completely Fair Scheduler [CFS]" patchset: > > http://redhat.com/~mingo/cfs-scheduler/sched-modular+cfs.patch I would suggest to drop the tsc.c change. The "small errors" can be really large on some systems and you can also see large backward jumps. I have a proper (but complicated) solution pending in ftp://ftp.firstfloor.org/pub/ak/x86_64/quilt/sched-clock-share BTW with all this CPU time measurement it would be really nice to report it to the user too. It seems a bit bizarre that the scheduler keeps track of ns, but top only knows jiffies with large sampling errors. -Andi