From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: NIU - Sun Neptune 10g - Transmit timed out reset (2.6.24) Date: Fri, 09 May 2008 15:07:56 -0700 (PDT) Message-ID: <20080509.150756.157662019.davem@davemloft.net> References: <482498D5.9060008@krogh.cc> <20080509.143229.174354251.davem@davemloft.net> <4824C936.9000103@krogh.cc> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: yhlu.kernel@gmail.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org To: jesper@krogh.cc Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:47138 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751079AbYEIWIC (ORCPT ); Fri, 9 May 2008 18:08:02 -0400 In-Reply-To: <4824C936.9000103@krogh.cc> Sender: netdev-owner@vger.kernel.org List-ID: From: Jesper Krogh Date: Fri, 09 May 2008 23:59:18 +0200 > 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. A single file transfer will not fill the pipe using this card, no matter how many cpus you have :-) The card is designed such that multiple parallel data streams over different connections result in the greatest throughput. > Should this setup not be able to fill the pipe? Nope, not with this card.