Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 30 Dec 2001 18:21:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 30 Dec 2001 18:21:36 -0500 Received: from ns.ithnet.com ([217.64.64.10]:34318 "HELO heather.ithnet.com") by vger.kernel.org with SMTP id ; Sun, 30 Dec 2001 18:21:20 -0500 Message-Id: <200112302320.AAA10992@webserver.ithnet.com> Cc: Timothy Covell , Dieter =?iso-8859-1?q?N=FCtzel?= , Robert Love , Linux Kernel List Date: Mon, 31 Dec 2001 00:20:29 +0100 Subject: Re: [PATCH] Balanced Multi Queue Scheduler ... To: Davide Libenzi Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT MIME-Version: 1.0 User-Agent: IMHO/0.97.1 (Webmail for Roxen) In-Reply-To: From: Stephan von Krawczynski Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > On Sun, 30 Dec 2001, Timothy Covell wrote: > > > each CPU? And this reminds me of how "make -j3 bzlilo" is slower than > > "make -j2 bzlilo". > > Running N CPU bound tasks on an M way SMP machine with N > M is never > going to improve your performace. On the contrary, expecially with the > current scheduler that keeps rotating the three tasks between the two > CPUs, you're going to suffer a slight performance degradation. And can you please post a patch for this? ;-) Honestly: it _should_ be fixed, there is a better way of doing it, and this is the base for a patch. Regards, Stephan - 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/