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 181BA1B204 for ; Wed, 12 Dec 2018 10:41:37 +0100 (CET) Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E8258750DA; Wed, 12 Dec 2018 09:41:35 +0000 (UTC) Received: from [10.36.112.28] (ovpn-112-28.ams2.redhat.com [10.36.112.28]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 0891E19C7D; Wed, 12 Dec 2018 09:41:28 +0000 (UTC) To: dev@dpdk.org, i.maximets@samsung.com, tiwei.bie@intel.com, zhihong.wang@intel.com, jfreimann@redhat.com, mst@redhat.com References: <20181212082403.12002-1-maxime.coquelin@redhat.com> From: Maxime Coquelin Message-ID: <35a465b4-6078-0de8-2446-42799d1520e2@redhat.com> Date: Wed, 12 Dec 2018 10:41:26 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20181212082403.12002-1-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 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Wed, 12 Dec 2018 09:41:36 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH] vhost: batch used descriptors 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: Wed, 12 Dec 2018 09:41:37 -0000 Sorry, just notice I missed to add v2 to the commit message prefix. On 12/12/18 9:24 AM, Maxime Coquelin wrote: > Instead of writing back descriptors chains in order, let's > write the first chain flags last in order to improve batching. > > With Kernel's pktgen benchmark, ~3% performance gain is measured. > > Signed-off-by: Maxime Coquelin > --- > lib/librte_vhost/virtio_net.c | 39 +++++++++++++++++++++-------------- > 1 file changed, 24 insertions(+), 15 deletions(-) >