From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Heffner Subject: Re: [PATCH] TSO Reloaded Date: Tue, 17 May 2005 22:51:53 -0400 Message-ID: <0dd16bed0ea56242244bab0a7f1cf372@psc.edu> References: <20050504230731.12be1bc3.davem@davemloft.net> <46332e5aa197db91aaf012cf140282b4@psc.edu> <20050517.192829.71087792.davem@davemloft.net> Mime-Version: 1.0 (Apple Message framework v622) Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@oss.sgi.com Return-path: In-Reply-To: <20050517.192829.71087792.davem@davemloft.net> To: "David S. Miller" Sender: netdev-bounce@oss.sgi.com Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org On May 17, 2005, at 10:28 PM, David S. Miller wrote: > From: John Heffner > Date: Tue, 17 May 2005 22:26:09 -0400 > >> Though it may be moot by now, I just ran some tests of my own with >> this >> patch. This was on a dual 2.4 GHz Xeon booted with a UP kernel, >> running iperf over an e1000 at a 1500 byte MTU. I measured idle CPU >> by >> running a process which sits in a gettimeofday() loop. Numbers are >> CPU >> utilization, all turned out +/- 1%. >> >> No TSO: 86.6% >> Old TSO: 61.0% >> New TSO: 88.5% > > Yeah, TSO Reloaded really stinks. :-) > > Try the "Super TSO" patch I just posted instead. Interesting timing. :) With the new patch I'm getting 78.0%. -John