From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matheos Worku Subject: Re: NIU - Sun Neptune 10g - Transmit timed out reset (2.6.24) Date: Fri, 09 May 2008 15:09:37 -0700 Message-ID: <4824CBA1.8040703@sun.com> References: <86802c440805071130m62c1f4edydb3316dac4a2aba2@mail.gmail.com> <20080507.141521.193714938.davem@davemloft.net> <482498D5.9060008@krogh.cc> <20080509.143229.174354251.davem@davemloft.net> <4824C936.9000103@krogh.cc> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset=ISO-8859-1 Content-Transfer-Encoding: 7BIT Cc: David Miller , yhlu.kernel@gmail.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org To: Jesper Krogh Return-path: Received: from sca-es-mail-1.Sun.COM ([192.18.43.132]:33029 "EHLO sca-es-mail-1.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753794AbYEIWJj (ORCPT ); Fri, 9 May 2008 18:09:39 -0400 In-reply-to: <4824C936.9000103@krogh.cc> Sender: netdev-owner@vger.kernel.org List-ID: Jesper Krogh wrote: > David Miller wrote: >> From: Jesper Krogh >> Date: Fri, 09 May 2008 20:32:53 +0200 >> >>> When it works I doesnt seem to be able to get it pass 500MB/s. >> >> With this card you really need multiple cpus and multiple threads >> sending data through the card in order to fill the 10Gb pipe. >> >> Single connections will not fill the pipe. > > The server is a Sun X4600 with 8 x dual-core CPU's, setup with 64 > NFS-threads. The other end of the fiber goes into a switch with gigabit > ports connected to 48 dual-core cpus. The test was done doing a dd on a > 4.5GB file from the server to /dev/null on the clients. Are you doing a TX or RX (with respect to the 10G if)? -- matheos > > The number of contextswitches seems enourmous.. over 120.000 sometimes. > When transmitting around the same amount of data (4xgigabit bonded with > 802.3ad) 4x110MB/s the amount of contextswitches only reaches 3-4.000. I > have no idea if this has any relevance. > > Should this setup not be able to fill the pipe? >