From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752053AbeC0Ddt (ORCPT ); Mon, 26 Mar 2018 23:33:49 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:56832 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751824AbeC0Ddr (ORCPT ); Mon, 26 Mar 2018 23:33:47 -0400 Subject: Re: [RFC PATCH V2 0/8] Packed ring for vhost To: Konrad Rzeszutek Wilk Cc: mst@redhat.com, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <1522035533-11786-1-git-send-email-jasowang@redhat.com> <20180326190130.GE6928@char.us.oracle.com> From: Jason Wang Message-ID: <1e5ad820-f11a-8208-d4c0-5d871adddb9e@redhat.com> Date: Tue, 27 Mar 2018 11:33:38 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: <20180326190130.GE6928@char.us.oracle.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2018年03月27日 03:01, Konrad Rzeszutek Wilk wrote: > On Mon, Mar 26, 2018 at 11:38:45AM +0800, Jason Wang wrote: >> Hi all: >> >> This RFC implement packed ring layout. The code were tested with pmd >> implement by Jens at >> http://dpdk.org/ml/archives/dev/2018-January/089417.html. Minor change >> was needed for pmd codes to kick virtqueue since it assumes a busy >> polling backend. >> >> Test were done between localhost and guest. Testpmd (rxonly) in guest >> reports 2.4Mpps. Testpmd (txonly) repots about 2.1Mpps. > And how does it compare to older ring layout? > No obvious difference. Vhost itself becomes a bottleneck. I plan to do more aggressive batching like dpdk on top. Thanks