From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 0BD1814EC for ; Mon, 16 Jan 2017 12:18:56 +0100 (CET) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga101.fm.intel.com with ESMTP; 16 Jan 2017 03:18:56 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,238,1477983600"; d="scan'208";a="809410725" Received: from yliu-dev.sh.intel.com (HELO yliu-dev) ([10.239.67.162]) by FMSMGA003.fm.intel.com with ESMTP; 16 Jan 2017 03:18:55 -0800 Date: Mon, 16 Jan 2017 19:21:10 +0800 From: Yuanhan Liu To: Michal =?iso-8859-1?Q?Ors=E1k?= Cc: Thomas Monjalon , Jan Viktorin , dev@dpdk.org Message-ID: <20170116112110.GD10293@yliu-dev.sh.intel.com> References: <1484108832-19907-1-git-send-email-yuanhan.liu@linux.intel.com> <1484108832-19907-2-git-send-email-yuanhan.liu@linux.intel.com> <1610499.AMUobBPor6@xps13> <20170112023058.GF2402@yliu-dev.sh.intel.com> <20170112160256.6915ff12.viktorin@rehivetech.com> <20170113061309.GF9770@yliu-dev.sh.intel.com> <20170116071218.GN9770@yliu-dev.sh.intel.com> <46569522-b2c3-2a33-9111-049b73c79760@stud.fit.vutbr.cz> <20170116111256.GA11439@yliu-dev.sh.intel.com> <8e8178c6-caa2-1b6e-10a0-c83820868db5@stud.fit.vutbr.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <8e8178c6-caa2-1b6e-10a0-c83820868db5@stud.fit.vutbr.cz> User-Agent: Mutt/1.5.23 (2014-03-12) Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH 1/2] net/virtio: fix performance regression due to TSO enabling X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Jan 2017 11:18:57 -0000 On Mon, Jan 16, 2017 at 12:14:04PM +0100, Michal Orsák wrote: > On 16.1.2017 12:12, Yuanhan Liu wrote: > >On Mon, Jan 16, 2017 at 12:05:04PM +0100, Michal Orsák wrote: > >>On 16.1.2017 08:12, Yuanhan Liu wrote: > >>>On Fri, Jan 13, 2017 at 02:13:09PM +0800, Yuanhan Liu wrote: > >>>>But it's not the test methodology I'd expect. You are purely testing > >>>>the instruction cycles. The drop on ARM is something more like "the > >>>>if instruction takes more cycles than the simple assignment". > >>>> > >>>>This macro is used in the case that one process is heavily writing > >>>>same value (0 here) again and again while another process is heavily > >>>>read it also again and again. That means cache violation always > >>>>happen. With this macro, however, this cache issue could be avoided, > >>>>since no write happens. > >>>> > >>>>For such workload, I don't think it would behaviour worse on ARM. > >>>No reply yet; I will treat it as no objections, and please shout out if any. > >>> > >>>Both applied to dpdk-next-virtio. > >>> > >>> --yliu > >>Hello, > >> > >> > >>currently I am running short of time. If you have any test prepared which i > >>can just ran, please send me a link. > >No link, but you could try: > > > >- a typical PVP test > > > >- a txonly test: running txonly fwd mode in guest PMD while running > > rxonly in fwd mode. > > > >The second is a micro test, thus I saw way bigger boost. > > > >When are you available for the testing, btw? > 25.1.2017+ Okay, I will hold on a while to apply them. --yliu