Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756051AbZGDLlg (ORCPT ); Sat, 4 Jul 2009 07:41:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753249AbZGDLl1 (ORCPT ); Sat, 4 Jul 2009 07:41:27 -0400 Received: from 41-052.adsl.zetnet.co.uk ([194.247.41.52]:37689 "EHLO mail.esperi.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752964AbZGDLl0 (ORCPT ); Sat, 4 Jul 2009 07:41:26 -0400 To: Andi Kleen Cc: xb , Linux Kernel Mailing List Subject: Re: Xeon 5500 series support in kernel References: <4A4C770F.6000709@bull.net> <877hyrbeon.fsf@basil.nowhere.org> From: Nix Emacs: more than just a Lisp interpreter, a text editor as well! Date: Sat, 04 Jul 2009 12:41:15 +0100 In-Reply-To: <877hyrbeon.fsf@basil.nowhere.org> (Andi Kleen's message of "2 Jul 2009 10:48:06 +0100") Message-ID: <87k52o65gk.fsf@hades.wkstn.nix> User-Agent: Gnus/5.1008 (Gnus v5.10.8) XEmacs/21.5-b28 (linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-DCC-CTc-dcc2-Metrics: hades 1031; Body=3 Fuz1=3 Fuz2=3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 784 Lines: 19 On 2 Jul 2009, Andi Kleen outgrape: > xb writes: > >> I wonder if there are specific kernel configuration parameters that >> allow to optimize performances on the recent Xeon 5500 processors (aka >> Nehalem). > > The most important optimization is to use a 64bit kernel with NUMA > support enabled (even if you use 32bit userland) Surely NUMA only benefits you if you have a >1 socket system? Where's the nonuniform access on a 1-socket machine? Every core is as far from all the RAM as every other core, isn't it? -- 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/