From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: RE: Low performance Intel 10GE NIC (3.2.10) on 2.6.38 Kernel Date: Thu, 14 Apr 2011 08:33:30 +0200 Message-ID: <1302762810.3549.233.camel@edumazet-laptop> References: <1302167168.3357.12.camel@edumazet-laptop> <1302176811.3357.15.camel@edumazet-laptop> <4D9DDF43.9080302@intel.com> <1302192218.3357.47.camel@edumazet-laptop> <4D9DE465.1080008@intel.com> <1302253651.4409.2.camel@edumazet-laptop> <1302267400.4409.22.camel@edumazet-laptop> <1302275223.4409.36.camel@edumazet-laptop> <1302330998.2656.113.camel@edumazet-laptop> <4DA3151B.4030507@intel.com> <1302536577.4605.1.camel@edumazet-laptop> <1302761251.3549.198.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Alexander Duyck , Peter Zijlstra , netdev , "Kirsher, Jeffrey T" To: Wei Gu Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:37459 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757126Ab1DNGdg (ORCPT ); Thu, 14 Apr 2011 02:33:36 -0400 Received: by wya21 with SMTP id 21so1104275wya.19 for ; Wed, 13 Apr 2011 23:33:35 -0700 (PDT) In-Reply-To: <1302761251.3549.198.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: Le jeudi 14 avril 2011 =C3=A0 08:07 +0200, Eric Dumazet a =C3=A9crit : > Le jeudi 14 avril 2011 =C3=A0 13:42 +0800, Wei Gu a =C3=A9crit : > > Hi guys, > > Do you think it was a bug in the kernel from 2.6.35.2 with Intel 10= GE ixgbe driver? > > If so shall I issue a Bug on the bugzilla, and which category? Caus= e I'm not sure it was driver problem Or sched problem. >=20 > This makes no sense to me. >=20 > What is the maximum throughput you can get in pps before having packe= t > drops ? >=20 > Please try with a single flow (to hit one queue, one cpu) >=20 > Thanks > =20 Also, please try to check if using smaller or bigger packets makes any change in this max throughput