Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932723AbVLHXlB (ORCPT ); Thu, 8 Dec 2005 18:41:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932733AbVLHXlB (ORCPT ); Thu, 8 Dec 2005 18:41:01 -0500 Received: from mx2.suse.de ([195.135.220.15]:46571 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S932723AbVLHXlA (ORCPT ); Thu, 8 Dec 2005 18:41:00 -0500 Date: Fri, 9 Dec 2005 00:40:58 +0100 From: Andi Kleen To: Christoph Lameter Cc: Andi Kleen , akpm@osdl.org, Christoph Hellwig , linux-ia64@vger.kernel.org, steiner@sgi.com, linux-kernel@vger.kernel.org, Wu Fengguang , discuss@x86-64.org Subject: Re: [discuss] Re: [PATCH 1/3] Zone reclaim V3: main patch Message-ID: <20051208234058.GA11190@wotan.suse.de> References: <20051208203707.30456.57439.sendpatchset@schroedinger.engr.sgi.com> <20051208210850.GS11190@wotan.suse.de> <20051208225102.GW11190@wotan.suse.de> <20051208232827.GZ11190@wotan.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1144 Lines: 26 On Thu, Dec 08, 2005 at 03:35:05PM -0800, Christoph Lameter wrote: > On Fri, 9 Dec 2005, Andi Kleen wrote: > > > > My experience is that at 20 systems do not need zone reclaim yet. > > > > I really cannot confirm your experience here. > > Maybe the meaning of these numbers varies? I know that 10 is a local > access but the assumption in include/linux/numa.h that 20 is a remote > access is probably already a guess. The spec seems to suggest it's roughly the NUMA factor scaled (so for 1.4 you would get 14). But I haven't actually seen a Opteron with correct SLIT yet so I don't know what they use ... > I know that our Altix machines seem to use 10 for a local and 20 for > nonlocal but same box. The distances then increase from there. Unless non local same box is 2 times as slow as the local I wouldn't consider that correct. (I would expect the Altix to do better than that) -Andi - 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/