From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oliver Hartkopp Subject: Re: Poorer networking performance in later kernels? Date: Tue, 19 Apr 2016 17:58:03 +0200 Message-ID: <5716558B.2080103@hartkopp.net> References: <57116D21.8000807@hpe.com> <57152600.7000801@hpe.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit To: "Butler, Peter" , Rick Jones , "netdev@vger.kernel.org" Return-path: Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.216]:19725 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932796AbcDSP63 (ORCPT ); Tue, 19 Apr 2016 11:58:29 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On 04/19/2016 04:54 PM, Butler, Peter wrote: > > I think the issue is resolved. I had to recompile my 4.4.0 kernel with a few options pertaining to the Intel NIC which somehow (?) got left out or otherwise clobbered when I ported my 3.4.2 .config to the 4.4.0 kernel source tree. With those changes now in I see essentially identical performance with the two kernels. Sorry for any confusion and/or waste of time here. My bad. > Can you please send the relevant changes in the config that caused the discussed issue? Just in the case other people do a similar kernel upgrade from 3.x to a recent kernel and the current defaults lead to this non-optimal result. Thanks, Oliver