From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Miller" Subject: Re: [PATCH] TSO Reloaded Date: Tue, 17 May 2005 19:28:29 -0700 (PDT) Message-ID: <20050517.192829.71087792.davem@davemloft.net> References: <20050504230731.12be1bc3.davem@davemloft.net> <46332e5aa197db91aaf012cf140282b4@psc.edu> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@oss.sgi.com Return-path: To: jheffner@psc.edu In-Reply-To: <46332e5aa197db91aaf012cf140282b4@psc.edu> Sender: netdev-bounce@oss.sgi.com Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org 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.