From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Duyck Subject: Re: Performance regression on kernels 3.10 and newer Date: Fri, 15 Aug 2014 12:10:29 -0700 Message-ID: <53EE5B25.3040206@intel.com> References: <53ECFDAB.5010701@intel.com> <1408041962.6804.31.camel@edumazet-glaptop2.roam.corp.google.com> <53ED4354.9090904@intel.com> <20140814.162024.2218312002979492106.davem@davemloft.net> <53EE4023.6080902@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: David Miller , Eric Dumazet , Linux Netdev List To: Tom Herbert Return-path: Received: from mga03.intel.com ([143.182.124.21]:19242 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751221AbaHOTKx (ORCPT ); Fri, 15 Aug 2014 15:10:53 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On 08/15/2014 11:49 AM, Tom Herbert wrote: > Alex, I tried to repro your problem running your script (on bnx2x). > Didn't see see the issue and in fact ip_dest_check did not appear in > top perf functions on perf. I assume this is more related to the > steering configuration rather than the device (although flow director > might be a fundamental difference). > So the original script I put out had a typo. It was supposed to run all 60 at the same time, not one at a time. So make sure you add an ampersand to the end of the netperf command line if you run the test so that it is 60 at once, not 60 in series. Also one other thing I had to do was disable tcp_autocork. Without that the test is a large packets test instead of a small packet test. Thanks, Alex