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: Wed, 22 Sep 2004 13:07:08 -0700 Sender: netdev-bounce@oss.sgi.com Message-ID: <4151DB6C.8050906@us.ibm.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: "David S. Miller" , anton@samba.org, netdev@oss.sgi.com Return-path: To: Andi Kleen In-Reply-To: <20040922195515.GA2619@wotan.suse.de> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org Andi Kleen wrote: > With tso off i get the same performance as on 2.6.5. > > I must add that this is a CSA e1000 (directly integrated into > the chipset and doesn't use PCI) and TSO doesn't seem to be > bring any advantage. On 2.6.5 the performance is the same > with both TSO on or off. Andi, was that with a netperf TCP stream test? I would not have thought there would be no difference prior to the changes DaveM made recently (now we obey congestion window). We certainly got quite a bit of a difference running SPECWeb etc, but that was on the e1000s. Nivedita