From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752535AbcHQIsh (ORCPT ); Wed, 17 Aug 2016 04:48:37 -0400 Received: from mga11.intel.com ([192.55.52.93]:44459 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750927AbcHQIsf (ORCPT ); Wed, 17 Aug 2016 04:48:35 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,529,1464678000"; d="scan'208";a="1037000779" Date: Wed, 17 Aug 2016 16:48:32 +0800 From: Aaron Lu To: Xin Long Cc: kernel test robot , Stephen Rothwell , lkp@01.org, "David S. Miller" , LKML Subject: Re: [LKP] [lkp] [sctp] a6c2f79287: netperf.Throughput_Mbps -37.2% regression Message-ID: <20160817084832.GA5342@aaronlu.sh.intel.com> References: <6e529b10-117d-8af0-66b3-2ccfb71acf2a@intel.com> <47965feb-3a4d-4e07-a9ed-86a3d58fb911@intel.com> <371c1f25-bc00-c36a-a7f5-fbe05cd58abc@intel.com> <20160817061405.GA5401@aaronlu.sh.intel.com> <20160817063719.GA5463@aaronlu.sh.intel.com> <375f06dd-8439-bba3-8b45-781e1e48dc9c@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 17, 2016 at 04:02:45PM +0800, Xin Long wrote: > >> you mean only this two line: > >>> + unsigned long prsctp_param; > >>> + int sent_count;ca; > >> > >> caused the performance issue ? > > > > Right. > OK, can you remove this line from your patch > + int sent_count; > > then test again, thanks. It doesn't change on my desktop Sandybridge. $ cat 4.7.0-rc6-01199-g116558d316e8/0/netperf.json { "netperf.Throughput_Mbps": [ 748.2056249999998 ] } Where commit 116558d316e8 is based on top of the last test commit 98dd2532b14e with the sent_count removed. Thanks, Aaron