From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: Can I limit number of rx queues for igb (and other Intel drivers)? Date: Fri, 18 Jun 2010 15:39:38 -0700 Message-ID: <4C1BF5AA.8010209@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]:35381 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753631Ab0FRWjk (ORCPT ); Fri, 18 Jun 2010 18:39:40 -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 o5IMddEM014367 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 18 Jun 2010 15:39:39 -0700 Sender: netdev-owner@vger.kernel.org List-ID: I'm using pktgen to send a stream of packets with varying source and destination IP addresses. It appears that the fancy rx logic of the NIC (I'm using igb for this test) causes the received packets to appear on random rx queues and so be received out of order in the network core. I do not see the out-of-order issue when using a single source/dest IP address for the pktgen packets. So, is there a way to tell igb to use only a single rx queue? Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com