From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263144AbVFXGRp (ORCPT ); Fri, 24 Jun 2005 02:17:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263168AbVFXGRp (ORCPT ); Fri, 24 Jun 2005 02:17:45 -0400 Received: from dsl027-180-168.sfo1.dsl.speakeasy.net ([216.27.180.168]:40585 "EHLO sunset.davemloft.net") by vger.kernel.org with ESMTP id S263144AbVFXGRK (ORCPT ); Fri, 24 Jun 2005 02:17:10 -0400 Date: Thu, 23 Jun 2005 23:16:55 -0700 (PDT) Message-Id: <20050623.231655.68159153.davem@davemloft.net> To: clameter@engr.sgi.com Cc: linux-kernel@vger.kernel.org, linux-net@vger.kernel.org, shai@scalex86.org, akpm@osdl.org, netdev@vger.kernel.org, herbert@gondor.apana.org.au Subject: Re: [PATCH] dst_entry structure use,lastuse and refcnt abstraction From: "David S. Miller" In-Reply-To: References: <20050623.211140.131918815.davem@davemloft.net> X-Mailer: Mew version 4.2 on Emacs 21.4 / Mule 5.0 (SAKAKI) 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 From: Christoph Lameter Date: Thu, 23 Jun 2005 23:03:45 -0700 (PDT) > Ok. Then we are done. With 58 Itanium processors and 200G Ram I get > more than 10% improvement ;-). With 500 tasks we have 453 vs. 499 j/m/t. > That is 9.21%. For 300 tasks we have 9.4% etc. I am sure that I can push > this some more with bigger counts of processors and also some other NUMA > related performance issues. So it took 7 times more processors to increase the performance gain by just over 3 on a microscopic synthetic benchmark. That's not impressive at all. And you still haven't shown what happens for the workloads I suggested. A web benchmark, with say a thousand unique clients, would be sufficient for one of those btw. That case has very low dst locality, yet dsts are useful because you'll have about 2 or 3 concurrent connections per dst.