From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by dpdk.org (Postfix) with ESMTP id 7AC86804F for ; Mon, 15 Dec 2014 11:47:44 +0100 (CET) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP; 15 Dec 2014 02:46:09 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,579,1413270000"; d="scan'208";a="654049289" Received: from bricha3-mobl3.ger.corp.intel.com ([10.243.20.31]) by orsmga002.jf.intel.com with SMTP; 15 Dec 2014 02:47:41 -0800 Received: by (sSMTP sendmail emulation); Mon, 15 Dec 2014 10:47:40 +0025 Date: Mon, 15 Dec 2014 10:47:40 +0000 From: Bruce Richardson To: Anant Mudambi Message-ID: <20141215104739.GA11332@bricha3-MOBL3> References: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Organization: Intel Shannon Ltd. User-Agent: Mutt/1.5.23 (2014-03-12) Cc: "dev@dpdk.org" Subject: Re: [dpdk-dev] Using multi-queue with RSS on X540 VF X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Dec 2014 10:47:45 -0000 On Sat, Dec 13, 2014 at 01:44:36AM +0000, Anant Mudambi wrote: > Hi all, > I am using DPDK 1.7.0. > Qemu-KVM system with the Intel 10G X540 NIC; host has the Linux ixgbe PF driver and a guest is using a VF with the DPDK ixgbevf PMD (uio). > I am trying to configure multiple (2 for now) receive queues on the VF and use RSS. > I see packets coming only to queue 0 for some reason. Some questions about this: > > 1] I see that most of the initial configuration to make multi-queue + RSS work is done in ixgbe_dev_mq_rx_configure() > [e.g. Setting up the redirect table and the MRQC register]. However, only the non-VF ixgbe_dev_rx_init() calls the above function; > ixgbevf_dev_rx_init() doesn't configure RSS-related hardware. Don't we need to do this configuration to use RSS on a VF? > 2] Even after configuring the RSS-related hardware in ixgbevf PMD, packets only come to queue 0. I printed out the RSS-type and RSS-hash-value > fields from the write back Rx descriptor and they are both set to 0. So for some reason no RSS hash is being done for any packets. > 3] Has anyone seen this kind of configuration work (multi-queue + RSS + VF)? I have an X540 NIC but has this worked on any other NIC for anyone? > 4] Also any ideas on how to debug this problem further? > > Thanks, > Anant RSS redirection of traffic in a VF is not supported by the hardware, so you are pretty much stuck with all VF traffic going to queue 0. [Later hardware, such as 4x10G NICs e.g. "Intel® Ethernet Converged Network Adapters XL710" using the i40e driver should support RSS with VFs] /Bruce