From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Duyck Subject: Re: Low performance Intel 10GE NIC (3.2.10) on 2.6.38 Kernel Date: Mon, 11 Apr 2011 07:50:03 -0700 Message-ID: <4DA3151B.4030507@intel.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Eric Dumazet , netdev , "Kirsher, Jeffrey T" To: Wei Gu Return-path: Received: from mga02.intel.com ([134.134.136.20]:17233 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752076Ab1DKOuE (ORCPT ); Mon, 11 Apr 2011 10:50:04 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On 4/10/2011 12:02 AM, Wei Gu wrote: > Hi , I haven't enable the packet header spilting, so I think no > netdev_alloc_page() will be called in my case. > > BTW, I also did the same test from 2.6.33 to 2.6.35 kernel, looks the > problem happens from 2.6.35, cause 2.6.32/33/34 do not see this > problem at all, they all works pretty good. > > I modify the .configs base on the FC13/14, and also manully set the > DMAR DEFAULT to off, chose the SLAB as the memory allocator (same as > RHEL6 2.6.32). For more detail about the config, please check the > attached file > > Thanks WeiGu WeiGu, In order to try and isolate this issue I was wondering if you could try our out-of-tree ixgbe driver from e1000.sf.net? The idea would be to test it on 2.6.34 and 2.6.35 in order to determine if the issue is due to a change in the kernel or a change in the driver. If the performance is the same on these two kernels with our out-of-tree driver then we know the issue is a change somewhere in the ixgbe driver in the kernel. Thanks, Alex