From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: Re: 8169 driver with NetGear GA511 card. Date: Thu, 28 Oct 2004 15:49:45 -0700 Sender: netdev-bounce@oss.sgi.com Message-ID: <41817789.4000703@candelatech.com> References: <41802CA8.8070900@candelatech.com> <20041028074827.GA3572@electric-eye.fr.zoreil.com> <418130C4.3010207@candelatech.com> <20041028223754.GA20521@electric-eye.fr.zoreil.com> 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: Francois Romieu In-Reply-To: <20041028223754.GA20521@electric-eye.fr.zoreil.com> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org Francois Romieu wrote: > Ben Greear : > [...] > >>I'm running tests at the ethernet frame (skb) level, so I would not >>expect the IP offload to help much. >> >>Do you have any performance numbers for your 8169 cards for me to >>compare against? > > > Gross numbers: > - with a receiving amd64, nttcp should saturate the GigaE link; > - halved bandwidth for Tx on the same setup. Untested since changes in -mm; > - 10% cpu on a 100bt link; > - TSO saves 5~7% of the cpu when it can be used. Cool, I am glad to know the chipset can handle it at least... >>I'll get this in a bit, as I have locked up the keyboard again. This time, >>I was still using the non-NAPI code which had run over-night at around >>5Mbps... >> >>I tried a different network setup, and noticed that the 8169 was only >>negotiating 10bt/HD. That would explain the poor performance numbers. > > Call me dense but... Are the 5Mbps below in the same unit as the 30Mbps > in your previous message (are they bytes or bits) ? If yes something is > badly broken. Yes, but I think now the problem is that it was stuck at 10bt/HD for whatever reason. There seems to be a way to lock the keyboard by trying to make the NIC change it's negotiate settings. I am going to try to track down exactly how this can be reproduced with minimum number of steps... Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com