From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2993318AbXDTTo7 (ORCPT ); Fri, 20 Apr 2007 15:44:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2993315AbXDTTo7 (ORCPT ); Fri, 20 Apr 2007 15:44:59 -0400 Received: from netops-testserver-4-out.sgi.com ([192.48.171.29]:44489 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2993118AbXDTTo7 (ORCPT ); Fri, 20 Apr 2007 15:44:59 -0400 Date: Fri, 20 Apr 2007 12:44:55 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: William Lee Irwin III cc: Ingo Molnar , linux-kernel@vger.kernel.org, Linus Torvalds , Andrew Morton , Con Kolivas , Nick Piggin , Mike Galbraith , Arjan van de Ven , Peter Williams , Thomas Gleixner , caglar@pardus.org.tr, Willy Tarreau , Gene Heskett Subject: Re: [patch] CFS scheduler, v3 In-Reply-To: <20070420193856.GC2986@holomorphy.com> Message-ID: References: <20070418175017.GA5250@elte.hu> <20070418212645.GU2986@holomorphy.com> <20070420192906.GB2986@holomorphy.com> <20070420193856.GC2986@holomorphy.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 20 Apr 2007, William Lee Irwin III wrote: > I'm not really convinced it's all that worthwhile of an optimization, > essentially for the same reasons as you, but presumably there's a > benchmark result somewhere that says it matters. I've just not seen it. If it is true that we frequently remotely write the per cpu runqueue data then we may have a NUMA scalability issue.