From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751657AbeCZDol (ORCPT ); Sun, 25 Mar 2018 23:44:41 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:45516 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750960AbeCZDoj (ORCPT ); Sun, 25 Mar 2018 23:44:39 -0400 Subject: Re: [RFC PATCH V2 0/8] Packed ring for vhost To: mst@redhat.com, virtualization@lists.linux-foundation.org Cc: kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Tiwei Bie , Jens Freimann , Wei Xu References: <1522035533-11786-1-git-send-email-jasowang@redhat.com> From: Jason Wang Message-ID: <1529f62d-dc16-d279-2ebf-85a6d2029ebe@redhat.com> Date: Mon, 26 Mar 2018 11:44:26 +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: <1522035533-11786-1-git-send-email-jasowang@redhat.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 cc Jens, Tiwei and Wei Thanks On 2018年03月26日 11:38, 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. > > Notes: The event suppression /indirect descriptor support is complied > test only because of lacked driver support. > > Changes from V1: > > - Refactor vhost used elem code to avoid open coding on used elem > - Event suppression support (compile test only). > - Indirect descriptor support (compile test only). > - Zerocopy support. > - vIOMMU support. > - SCSI/VSOCK support (compile test only). > - Fix several bugs > > For simplicity, I don't implement batching or other optimizations. > > Please review. > > Thanks > > Jason Wang (8): > vhost: move get_rx_bufs to vhost.c > vhost: hide used ring layout from device > vhost: do not use vring_used_elem > vhost_net: do not explicitly manipulate vhost_used_elem > vhost: vhost_put_user() can accept metadata type > virtio: introduce packed ring defines > vhost: packed ring support > vhost: event suppression for packed ring > > drivers/vhost/net.c | 138 ++----- > drivers/vhost/scsi.c | 62 +-- > drivers/vhost/vhost.c | 818 ++++++++++++++++++++++++++++++++++--- > drivers/vhost/vhost.h | 46 ++- > drivers/vhost/vsock.c | 42 +- > include/uapi/linux/virtio_config.h | 9 + > include/uapi/linux/virtio_ring.h | 32 ++ > 7 files changed, 921 insertions(+), 226 deletions(-) >