From mboxrd@z Thu Jan 1 00:00:00 1970 From: Klaus Degner Subject: jumbo frame support for 82583V Date: Fri, 17 Jul 2015 13:56:03 +0200 Message-ID: <55A8ED53.8080802@allegro-packets.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: "dev@dpdk.org" To: Wenzhuo Lu 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) List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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