Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261606AbVDEH0V (ORCPT ); Tue, 5 Apr 2005 03:26:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261590AbVDEHZy (ORCPT ); Tue, 5 Apr 2005 03:25:54 -0400 Received: from omx2-ext.sgi.com ([192.48.171.19]:14512 "EHLO omx2.sgi.com") by vger.kernel.org with ESMTP id S261601AbVDEHWq (ORCPT ); Tue, 5 Apr 2005 03:22:46 -0400 Date: Tue, 5 Apr 2005 00:20:58 -0700 From: Paul Jackson To: Andi Kleen Cc: kenneth.w.chen@intel.com, torvalds@osdl.org, nickpiggin@yahoo.com.au, akpm@osdl.org, linux-kernel@vger.kernel.org Subject: Re: [patch] sched: auto-tune migration costs Message-Id: <20050405002058.3d90a2de.pj@engr.sgi.com> In-Reply-To: References: <200504020100.j3210fg04870@unix-os.sc.intel.com> <20050402145351.GA11601@elte.hu> <20050402215332.79ff56cc.pj@engr.sgi.com> <20050403070415.GA18893@elte.hu> <20050403043420.212290a8.pj@engr.sgi.com> <20050403071227.666ac33d.pj@engr.sgi.com> <20050403150102.GA25442@elte.hu> <20050403153056.0ad6ee8e.pj@engr.sgi.com> Organization: SGI X-Mailer: Sylpheed version 1.0.0 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 806 Lines: 21 Andi wrote: > There is already an arch neutral mechanism in sysfs, see > /sys/devices/system/node/node*/distance Excellent - thank-you. > But of course SLIT doesn't know anything about cache latencies. Of course. Though SLIT does know about basic node distances, which tend to correlate with cache migration costs, apparently closely enough for our current modest needs. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.650.933.1373, 1.925.600.0401 - 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/