From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: Why is LRO off by default on ixgbe? Date: Wed, 23 Sep 2009 09:29:59 -0700 Message-ID: <4ABA4D07.50107@candelatech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: NetDev Return-path: Received: from mail.candelatech.com ([208.74.158.172]:43783 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751232AbZIWQ34 (ORCPT ); Wed, 23 Sep 2009 12:29:56 -0400 Received: from [192.168.100.195] (firewall.candelatech.com [70.89.124.249]) (authenticated bits=0) by ns3.lanforge.com (8.14.2/8.14.2) with ESMTP id n8NGTxqd003314 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 23 Sep 2009 09:29:59 -0700 Sender: netdev-owner@vger.kernel.org List-ID: I just noticed that enabling LRO on ixgbe lets me reach about 9Gbps receive on two NICs concurrently in an NFS test, where I was only getting about 6Gbps w/out it (1500 MTU). Why is LRO disabled by default? Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com