From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 914361BD76 for ; Fri, 21 Dec 2018 10:21:01 +0100 (CET) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B4F2619CBC7; Fri, 21 Dec 2018 09:21:00 +0000 (UTC) Received: from [10.36.112.53] (ovpn-112-53.ams2.redhat.com [10.36.112.53]) by smtp.corp.redhat.com (Postfix) with ESMTPS id A1BB5620DF; Fri, 21 Dec 2018 09:20:55 +0000 (UTC) To: dev@dpdk.org, i.maximets@samsung.com, tiwei.bie@intel.com, zhihong.wang@intel.com, jfreiman@redhat.com, mst@redhat.com References: <20181220164755.8509-1-maxime.coquelin@redhat.com> From: Maxime Coquelin Message-ID: <9f30e6f1-d373-fac1-4662-cbeecec3b75f@redhat.com> Date: Fri, 21 Dec 2018 10:20:53 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1 MIME-Version: 1.0 In-Reply-To: <20181220164755.8509-1-maxime.coquelin@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 21 Dec 2018 09:21:01 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH v4] vhost: batch used descs chains write-back with packed ring 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: Fri, 21 Dec 2018 09:21:01 -0000 On 12/20/18 5:47 PM, Maxime Coquelin wrote: > Instead of writing back descriptors chains in order, let's > write the first chain flags last in order to improve batching. > > Also, move the write barrier in logging cache sync, so that it > is done only when logging is enabled. It means there is now > one more barrier for split ring when logging is enabled. > > With Kernel's pktgen benchmark, ~3% performance gain is measured. > > Signed-off-by: Maxime Coquelin > --- > lib/librte_vhost/vhost.h | 2 ++ > lib/librte_vhost/virtio_net.c | 19 ++++++++++++++++--- > 2 files changed, 18 insertions(+), 3 deletions(-) Applied to dpdk-next-virtio Maxime