From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265953AbUEUUda (ORCPT ); Fri, 21 May 2004 16:33:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266016AbUEUUd3 (ORCPT ); Fri, 21 May 2004 16:33:29 -0400 Received: from e6.ny.us.ibm.com ([32.97.182.106]:38066 "EHLO e6.ny.us.ibm.com") by vger.kernel.org with ESMTP id S265953AbUEUUdA (ORCPT ); Fri, 21 May 2004 16:33:00 -0400 Date: Fri, 21 May 2004 13:32:10 -0700 From: "Martin J. Bligh" To: Andi Kleen cc: linux-kernel@vger.kernel.org, brettspamacct@fastclick.com Subject: Re: How can I optimize a process on a NUMA architecture(x86-64 specifically)? Message-ID: <93090000.1085171530@flay> In-Reply-To: References: <1Y6yr-eM-11@gated-at.bofh.it> <1YbRm-4iF-11@gated-at.bofh.it><1Yma3-4cF-3@gated-at.bofh.it> <1YmjP-4jX-37@gated-at.bofh.it><1YmMN-4Kh-17@gated-at.bofh.it> <1Yn67-50q-7@gated-at.bofh.it> X-Mailer: Mulberry/2.1.2 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > "Martin J. Bligh" writes: > >> For any given situation, you can come up with a scheduler mod that improves >> things. The problem is making something generic that works well in most >> cases. > > The point behind numa api/numactl is that if the defaults > don't work well enough you can tune it by hand to be better. > > There are some setups which can be significantly improved with some > hand tuning, although in many cases the default behaviour is good enough > too. Oh, I'm not denying it can make things better ... just 90% of the people who want to try it would be better off leaving it the hell alone ;-) M.