From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261840AbTFCXQl (ORCPT ); Tue, 3 Jun 2003 19:16:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261868AbTFCXQk (ORCPT ); Tue, 3 Jun 2003 19:16:40 -0400 Received: from pc2-cwma1-4-cust86.swan.cable.ntl.com ([213.105.254.86]:21122 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S261840AbTFCXQk (ORCPT ); Tue, 3 Jun 2003 19:16:40 -0400 Subject: Re: NPTL/SMP/NUMA From: Alan Cox To: William Voorsluys Cc: Linux Kernel Mailing List In-Reply-To: References: Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Message-Id: <1054679535.9233.87.camel@dhcp22.swansea.linux.org.uk> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-5) Date: 03 Jun 2003 23:32:17 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Maw, 2003-06-03 at 23:26, William Voorsluys wrote: > thinking on SMP machines, and which have been made to other purposes? > Is there any feature on the library/kernel that make it possible to > exploit the benefits of NUMA systems? NUMA systems don't have any benefits (well other than engineering considerations like practicality of construction). From a software perspective NUMA is simply a question of making the loss as little as possible. There are patches to do more NUMA aware scheduling which help a bit as well as to do things like replicate the kernel code to each node.