From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nivedita Singhvi Subject: Re: bad TSO performance in 2.6.9-rc2-BK Date: Mon, 20 Sep 2004 08:54:18 -0700 Sender: netdev-bounce@oss.sgi.com Message-ID: <414EFD2A.5000805@us.ibm.com> References: <20040920063012.GL2825@krispykreme> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@oss.sgi.com Return-path: To: Anton Blanchard In-Reply-To: <20040920063012.GL2825@krispykreme> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org Anton Blanchard wrote: > Hi, > > I just tried latest 2.6.9-rc2-BK on a machine with an e1000 on it. With > TSO off it does about 100MB/sec. With TSO on it does between 1MB/sec and > 10MB/sec. Hey Anton, yep, I was just debugging this. TSO mainline reworked implementation is still not cooked. Don't worry, final state won't be this bad :). Could you echo 0 > /proc/sys/net/ipv4/tcp_bic and redo test, please?