Received: with ECARTIS (v1.0.0; list netdev); Wed, 22 Sep 2004 14:57:27 -0700 (PDT) Received: from Cantor.suse.de (cantor.suse.de [195.135.220.2]) by oss.sgi.com (8.13.0/8.13.0) with ESMTP id i8MLvFGA031546 for ; Wed, 22 Sep 2004 14:57:17 -0700 Received: from hermes.suse.de (hermes-ext.suse.de [195.135.221.8]) (using TLSv1 with cipher EDH-RSA-DES-CBC3-SHA (168/168 bits)) (No client certificate requested) by Cantor.suse.de (Postfix) with ESMTP id 48784C50E82; Wed, 22 Sep 2004 23:56:59 +0200 (CEST) Date: Wed, 22 Sep 2004 23:56:57 +0200 From: Andi Kleen To: "David S. Miller" Cc: Nivedita Singhvi , ak@suse.de, anton@samba.org, netdev@oss.sgi.com Subject: Re: bad TSO performance in 2.6.9-rc2-BK Message-ID: <20040922215657.GB2619@wotan.suse.de> References: <20040920063012.GL2825@krispykreme> <20040920203021.GD4242@wotan.suse.de> <20040921155835.18aee381.davem@davemloft.net> <20040922140000.GD27432@wotan.suse.de> <20040922111209.7887df53.davem@davemloft.net> <20040922195515.GA2619@wotan.suse.de> <4151DB6C.8050906@us.ibm.com> <20040922133011.5885640b.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040922133011.5885640b.davem@davemloft.net> X-archive-position: 9328 X-ecartis-version: Ecartis v1.0.0 Sender: netdev-bounce@oss.sgi.com Errors-to: netdev-bounce@oss.sgi.com X-original-sender: ak@suse.de Precedence: bulk X-list: netdev Content-Length: 295 Lines: 11 > I have no idea why people think TSO will make some single > stream TCP test go faster, it doesn't buy you more bytes > on the wire :-) It definitely helps on 10GB/s - without it the maximum for single stream is slower. I suspect with a slow bus you can also see advantages on 1Gb/s. -Andi