From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtprelay02.ispgateway.de (smtprelay02.ispgateway.de [80.67.18.44]) by dpdk.org (Postfix) with ESMTP id A5B6F5A59 for ; Fri, 17 Jul 2015 13:56:05 +0200 (CEST) Received: from [87.172.135.96] (helo=nb-klaus.allegro) by smtprelay02.ispgateway.de with esmtpsa (TLSv1.2:DHE-RSA-AES128-SHA:128) (Exim 4.84) (envelope-from ) id 1ZG4FI-0007ze-RI; Fri, 17 Jul 2015 13:56:04 +0200 To: Wenzhuo Lu From: Klaus Degner Message-ID: <55A8ED53.8080802@allegro-packets.com> Date: Fri, 17 Jul 2015 13:56:03 +0200 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Df-Sender: a2RAYWxsZWdyby1wYWNrZXRzLmNvbQ== Cc: "dev@dpdk.org" Subject: [dpdk-dev] jumbo frame support for 82583V 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: Fri, 17 Jul 2015 11:56:05 -0000 Hi Wenzhuo, We are testing different Intel NICs for DPDK. We have tested the master branch with the support for 82583V Intel chip. It works very well except that we can only use up to 1518 bytes for maximum packet capture. We have debugged this and it is restricted in the initialization: http://dpdk.org/browse/dpdk/tree/drivers/net/e1000/em_ethdev.c#n855 Without DPDK, the linux driver support and mtu up to 9k and ark.intel reports that this chip is jumbo frame capable: http://ark.intel.com/de/products/41676/Intel-82583V-Gigabit-Ethernet-Controller Is there any specific reason why DPDK cannot use jumbo frames for this NIC ? Thanks for help ! Klaus