From patchwork Thu Mar 10 06:54:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Ding, Xuan" X-Patchwork-Id: 108630 Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 746ECA0093; Thu, 10 Mar 2022 07:56:59 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 48E35410FC; Thu, 10 Mar 2022 07:56:59 +0100 (CET) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by mails.dpdk.org (Postfix) with ESMTP id 8655F410DD for ; Thu, 10 Mar 2022 07:56:56 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1646895416; x=1678431416; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=xGsX5IMNGgXGj/1dM+3U0S0rIvcfhqXXQWzCNQt7c3E=; b=D4ViAgxgGdiKzraalifnNmu+lNxO5eaJnBzgOwOsug0200yFEKp/pVOC H4Hih7dAM0uioN6Yubqr+xtr1ZgtwBfR4YyAOUY2meC5T7h+9sGvRVBSN 4YCZKU5cai8sckZsMvs0sgNYe4AqyLW92ae2nZmUKGVuyzV3TutdfUX8h FIw2utAVYENk3PHxXWphsN65mongvYMws9k60s+8quoBdfPjExxCnfCzB v8u0g5dtgJGpqMYPqK5oexbhB8Bblb3U2ie8EnIz3/beQ4QptivM4PJj7 OlHBcgWko69yPr0kEk7w6QjmWrdepe1kVYI36HVeWifUDhq9HJtqvHXZy w==; X-IronPort-AV: E=McAfee;i="6200,9189,10281"; a="254006053" X-IronPort-AV: E=Sophos;i="5.90,169,1643702400"; d="scan'208";a="254006053" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Mar 2022 22:56:55 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,169,1643702400"; d="scan'208";a="538333249" Received: from npg-dpdk-xuan-cbdma.sh.intel.com ([10.67.110.228]) by orsmga007.jf.intel.com with ESMTP; 09 Mar 2022 22:56:52 -0800 From: xuan.ding@intel.com To: maxime.coquelin@redhat.com, chenbo.xia@intel.com Cc: dev@dpdk.org, jiayu.hu@intel.com, cheng1.jiang@intel.com, sunil.pai.g@intel.com, liangma@liangbit.com, Xuan Ding Subject: [RFC,v3 0/2] vhost: support async dequeue data path Date: Thu, 10 Mar 2022 06:54:05 +0000 Message-Id: <20220310065407.17145-1-xuan.ding@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220101001244.90147-1-xuan.ding@intel.com> References: <20220101001244.90147-1-xuan.ding@intel.com> X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org From: Xuan Ding The presence of asynchronous path allows applications to offload memory copies to DMA engine, so as to save CPU cycles and improve the copy performance. This patch set is a draft implementation for split ring in vhost async dequeue data path. The code is based on latest enqueue changes [1]. This patch set is a new design and implementation of [2]. Since dmadev was introduced in DPDK 21.11, to simplify application logics, this patch integrates dmadev in vhost. With dmadev integrated, vhost supports M:N mapping between vrings and DMA virtual channels. Specifically, one vring can use multiple different DMA channels and one DMA channel can be shared by multiple vrings at the same time. A new asynchronous dequeue function is introduced: 1) rte_vhost_async_try_dequeue_burst(int vid, uint16_t queue_id, struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count, int *nr_inflight, uint16_t dma_id, uint16_t vchan_id) Receive packets from the guest and offloads copies to DMA virtual channel. [1] https://mails.dpdk.org/archives/dev/2022-February/234555.html [2] https://mails.dpdk.org/archives/dev/2021-September/218591.html RFC v2->v3: * rebase to latest DPDK version RFC v1 -> v2: * fix one bug in example * rename vchan to vchan_id * check if dma_id and vchan_id valid * rework all the logs to new standard Xuan Ding (2): vhost: support async dequeue for split ring examples/vhost: support async dequeue data path doc/guides/sample_app_ug/vhost.rst | 9 +- examples/vhost/main.c | 292 +++++++++++------ examples/vhost/main.h | 35 +- examples/vhost/virtio_net.c | 16 +- lib/vhost/rte_vhost_async.h | 37 ++- lib/vhost/version.map | 1 + lib/vhost/vhost.h | 1 + lib/vhost/virtio_net.c | 504 +++++++++++++++++++++++++++++ 8 files changed, 795 insertions(+), 100 deletions(-)