From mboxrd@z Thu Jan 1 00:00:00 1970 From: "J.Hwan Kim" Subject: intel 82599 multi-port performance Date: Mon, 26 Sep 2011 19:26:33 +0900 Message-ID: <4E805359.2080600@gmail.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-iy0-f174.google.com ([209.85.210.174]:37241 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753267Ab1IZK0g (ORCPT ); Mon, 26 Sep 2011 06:26:36 -0400 Received: by iaqq3 with SMTP id q3so4394416iaq.19 for ; Mon, 26 Sep 2011 03:26:36 -0700 (PDT) Sender: netdev-owner@vger.kernel.org List-ID: Hi, everyone Now, I'm testing a network card including intel 82599. In our experiment, with the driver modified with ixgbe and multi-port enabled, rx performance of each port with 10Gbps of 64bytes frame is a half than when only 1 port is used. The pcie of our server is GEN2 (5x X 8). Is the result reasonable? When multi-ports are enabled and 10G stream is inserted to each port, the maximum performance of each port is a half in our experiment. Do you think it is a problem of our modified driver or the performance bottleneck of 82599? Now I cannot understand our experiment result. Please give me an advice. Thanks in advance. Best Regards, J.Hwan Kim