From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: How fast can your 10G go? Date: Tue, 19 May 2009 09:05:40 -0700 Message-ID: <4A12D8D4.2070303@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]:55680 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750721AbZESQFl (ORCPT ); Tue, 19 May 2009 12:05:41 -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 n4JG5e1u016092 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 19 May 2009 09:05:41 -0700 Sender: netdev-owner@vger.kernel.org List-ID: I've been running some tests on a new Nehalem based system with a 2 port pci-e x8 10G NIC (ixgbe driver). When using pktgen, max I can get is about 5.6Gbps tx + rx on both ports. This is about 22Gbps across the backplane, so I don't mean to complain :) However, I'm curious if anyone has gotten any better performance on some other system? In particular, it seems that my system is bound by the bus and/or the NIC. Would I need to find something like a x16 slot to have a chance at 10Gbps bi-directional on 2 ports? Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com