From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Duyck Subject: Re: [BUG] net: performance regression on ixgbe (Intel 82599EB 10-Gigabit NIC) Date: Thu, 3 Dec 2015 09:15:22 -0800 Message-ID: <566078AA.5040804@gmail.com> References: <20151203162627.GA8989@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Jirka Hladky , "e1000-devel@lists.sourceforge.net" , Adam Okuliar , Kamil Kolakowski To: Otto Sabart , netdev@vger.kernel.org Return-path: In-Reply-To: <20151203162627.GA8989@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: e1000-devel-bounces@lists.sourceforge.net List-Id: netdev.vger.kernel.org On 12/03/2015 08:26 AM, Otto Sabart wrote: > Hello netdev, > I probably found a performance regression on ixgbe (Intel 82599EB > 10-Gigabit NIC) on v4.4-rc3. I am able to see this problem since > v4.4-rc1. > > The bug report you can find here [0]. > > Can somebody take a look at it? > > [0] https://bugzilla.redhat.com/show_bug.cgi?id=1288124 > > > thanks, > Ota 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. If that doesn't resolve the issue it would be useful if you could might try doing a git bisect to narrow this down to a specific patch. Thanks. - Alex ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741911&iu=/4140 _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired