From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anders =?iso-8859-1?Q?Bostr=F6m?= Subject: Re: Bug#565404: linux-image-2.6.26-2-amd64: atl1e: TSO is broken Date: Wed, 20 Jan 2010 10:27:04 +0100 (CET) Message-ID: <20100120.102704.295948365864962720.anders@netinsight.net> References: <1263767939.8876.94.camel@localhost> <20100118.154347.314005348620400016.anders@netinsight.net> Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: ben@decadent.org.uk, netdev@vger.kernel.org, 565404@bugs.debian.org, Xiong.Huang@Atheros.com To: Jie.Yang@Atheros.com Return-path: Received: from ernst.netinsight.se ([194.16.221.21]:10612 "HELO ernst.netinsight.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751061Ab0ATJ1P convert rfc822-to-8bit (ORCPT ); Wed, 20 Jan 2010 04:27:15 -0500 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: >>>>> "JY" =3D=3D Jie Yang writes: JY> Anders Bostr=F6m wrote: >> It is an ASUS M4A78 PRO motherboard with the Atheros >> AR8121/AR8113/AR8114 on-board. >>=20 >> >> ~25Mbyte/s performance. I get ~5000 retransmitted packets >> per GByte >> data, according to RetransSegs in >> /proc/net/snmp . wireshark in the >> client show that the >> server send out a sequence of frames. All but the >> last >> one are 1500 bytes IP-packets. The last one is shorter, but >> the >> IP-header still say 1500 byte. The client then >> requests retransmit, >> and the retransmitted frame arrives >> with correct IP-header. JY> i just test it on Linux localhost.localdomain 2.6.31.5-127.fc12.x8= 6_64 #1 SMP Sat Nov 7 21:11:14 EST 2009 x86_64 x86_64 x86_64 GNU/Linux. JY> with hardware, Atheros AR8121/AR8113/AR8114 PCI-E Ethernet Control= ler (rev b0) JY> device id : 1969:1026 (rev b0) JY> i upload/download a 382M it work well with retransmit packet: Have you tested NFS over TCP? The block-size the application uses can have an effect on this. What application did you use? Block-size? / Anders