From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263811AbTLTDzt (ORCPT ); Fri, 19 Dec 2003 22:55:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263812AbTLTDzt (ORCPT ); Fri, 19 Dec 2003 22:55:49 -0500 Received: from mail-06.iinet.net.au ([203.59.3.38]:49044 "HELO mail.iinet.net.au") by vger.kernel.org with SMTP id S263811AbTLTDzr (ORCPT ); Fri, 19 Dec 2003 22:55:47 -0500 Message-ID: <3FE3C840.4000702@cyberone.com.au> Date: Sat, 20 Dec 2003 14:55:44 +1100 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030827 Debian/1.4-3 X-Accept-Language: en MIME-Version: 1.0 To: Huo Zhigang CC: linux-kernel@vger.kernel.org Subject: Re: lmbench 2.4.20-8(RH9), 2.4.20, 2.6.0 References: <20031220034548.GA4809@lucent> In-Reply-To: <20031220034548.GA4809@lucent> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Huo Zhigang(???) wrote: >Howdy, > >Is the network performance of 2.6.0 so bad or my test >totally wrong? > >Could anyone tell me how to dig into performance >optimization of linux? > This has come up a few times, but nobody is too worried about it. I have profiles showing that more than double the amount of time is spent in copying data for the same amount of work. Its worth noting though, that it is "networking" over localhost. I expect the numbers for remote networking are better, but don't have a good network setup to test it. Do you have any real applications (not benchmarks) that have performance problems?