From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 655A8A04FD; Mon, 11 Apr 2022 12:01:01 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 43E8C4068C; Mon, 11 Apr 2022 12:01:01 +0200 (CEST) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by mails.dpdk.org (Postfix) with ESMTP id 02C8540685 for ; Mon, 11 Apr 2022 12:00:59 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1649671260; x=1681207260; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=wPoBm5paQcZRQBRQ46SxokOoKS72Xv1+xmfYDmoilH4=; b=LqU+7DrcdCCQYM16RZjXKeTF4p9kfw/ongvso2Mre/2FT60agxV4PfqX FtKx96BnZmBCTy6nUil0d0mD0fgzkQ2EpMIz+OTOuGUHsNIyS6Gqbms31 8F89BELoQZIhSspsp61a80nXEkxDpaeK36qAk41OS56xZqqwGuuq+Tbdk jmRW+nhFt1idJQXlRVXKFb2uYGFeAwYoLsGaKD8Ij0jcykdkI6tie030H v0uvSpzSsi+7/x5s7tn8Sq96xxui0AkfzWONIwseWwx3YBFRv928SX220 nBbI5D3Fuq5QCCSYnAJx7YmYpiPWi0QctDE39r4/x/bAZKR6Pm6K/lgoa g==; X-IronPort-AV: E=McAfee;i="6400,9594,10313"; a="249361583" X-IronPort-AV: E=Sophos;i="5.90,251,1643702400"; d="scan'208";a="249361583" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Apr 2022 03:00:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,251,1643702400"; d="scan'208";a="525446125" Received: from npg-dpdk-xuan-cbdma.sh.intel.com ([10.67.110.228]) by orsmga002.jf.intel.com with ESMTP; 11 Apr 2022 03:00:56 -0700 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: [PATCH v2 0/5] vhost: support async dequeue data path Date: Mon, 11 Apr 2022 10:00:27 +0000 Message-Id: <20220411100032.114434-1-xuan.ding@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220407152546.38167-1-xuan.ding@intel.com> References: <20220407152546.38167-1-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 implements vhost async dequeue data path for split ring. 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 v1->v2: * fix a typo * fix a bug in desc_to_mbuf filling RFC v3 -> v1: * add sync and async path descriptor to mbuf refactoring * add API description in docs RFC v2 -> RFC v3: * rebase to latest DPDK version RFC v1 -> RFC 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 (5): vhost: prepare sync for descriptor to mbuf refactoring vhost: prepare async for descriptor to mbuf refactoring vhost: merge sync and async descriptor to mbuf filling vhost: support async dequeue for split ring examples/vhost: support async dequeue data path doc/guides/prog_guide/vhost_lib.rst | 7 + doc/guides/rel_notes/release_22_07.rst | 4 + 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 | 33 ++ lib/vhost/version.map | 3 + lib/vhost/vhost.h | 1 + lib/vhost/virtio_net.c | 460 ++++++++++++++++++++++--- 10 files changed, 712 insertions(+), 148 deletions(-) -- 2.17.1