From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262372AbTICFoe (ORCPT ); Wed, 3 Sep 2003 01:44:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262821AbTICFoe (ORCPT ); Wed, 3 Sep 2003 01:44:34 -0400 Received: from swm.pp.se ([195.54.133.5]:63617 "EHLO uplift.swm.pp.se") by vger.kernel.org with ESMTP id S262372AbTICFod (ORCPT ); Wed, 3 Sep 2003 01:44:33 -0400 Date: Wed, 3 Sep 2003 07:44:32 +0200 (CEST) From: Mikael Abrahamsson To: linux-kernel@vger.kernel.org Subject: Re: Scaling noise In-Reply-To: <20030903050859.GD10257@work.bitmover.com> Message-ID: Organization: People's Front Against WWW 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 On Tue, 2 Sep 2003, Larry McVoy wrote: > It's called asymptotic behavior. After a while you can look at the graph > and see that more CPUs on the same memory doesn't make sense. It hasn't > made sense for a decade, what makes anyone think that is changing? It didnt make sense two decades ago either, the VAX 8300 could be made to go 6way and it stopped going faster around the third processor added. (my memory is a bit rusty, but I believe this is what we came up with when we got donated a few of those in the mid 90ties and yes, they're not from 83 but perhaps from 86-87 so not two decades ago either). -- Mikael Abrahamsson email: swmike@swm.pp.se