From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: [BUG] net: performance regression on ixgbe (Intel 82599EB 10-Gigabit NIC) Date: Mon, 7 Dec 2015 10:25:07 -0800 Message-ID: <5665CF03.3030606@hpe.com> References: <20151203162627.GA8989@redhat.com> <566078AA.5040804@gmail.com> <20151207112837.GA14417@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, Jeff Kirsher , Jirka Hladky , Adam Okuliar , Kamil Kolakowski , "e1000-devel@lists.sourceforge.net" To: Otto Sabart , Alexander Duyck Return-path: Received: from g9t1613g.houston.hp.com ([15.240.0.71]:33907 "EHLO g9t1613g.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753835AbbLGSZJ (ORCPT ); Mon, 7 Dec 2015 13:25:09 -0500 Received: from g4t3427.houston.hp.com (g4t3427.houston.hp.com [15.201.208.55]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by g9t1613g.houston.hp.com (Postfix) with ESMTPS id 1CF6C60643 for ; Mon, 7 Dec 2015 18:25:09 +0000 (UTC) In-Reply-To: <20151207112837.GA14417@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: On 12/07/2015 03:28 AM, Otto Sabart wrote: >> Hi Ota, >> >> It looks like there were a few changes that went through that could be >> causing the regression. The most obvious one that jumps out at me is commit >> 72bfd32d2f84 ("ixgbe: disable LRO by default"). As such one thing you might >> try doing is turning on LRO support via ethtool -k to see if that is the >> issue you are seeing. >> > > Hi Alex, > enabling LRO resolved the problem. So you had the same NIC and CPUs and whatnot on both sides? rick jones