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 6F060A0505; Thu, 7 Apr 2022 17:31:19 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 64FD74068B; Thu, 7 Apr 2022 17:31:19 +0200 (CEST) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by mails.dpdk.org (Postfix) with ESMTP id 7662F40689 for ; Thu, 7 Apr 2022 17:31:17 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1649345477; x=1680881477; h=from:to:cc:subject:date:message-id; bh=9xNlgPBttJLH/rEazQ0WPnGpgBLlGiM1XGhutnaFUGA=; b=IQa14xq5VOPHkYZAmqXuvmtSIrHNMiQRdJHFL9S2vnxTC7gjMHbLEwQk aWnnLN6XbKidFCxaCgtK3stwZiDeLwyqEpKdtN8gvRDFkhnESU4aHfdyv cmoUQKhI6uJJfzEZbW0eX9SRR9D4lx4oxfz533QuAH78uJAznhqv/sRVD CLd6ZI0RASdra9p/JvPH7q7g7q3N4dDedjSLTuexjb1POJQlKNnZqU21a AZpqqztHEV9Yl/28uj3PqFAN6bz4/tzcFiirgDj8e6bi14Cf+6pzZHd15 Mml9ZXY1SbzLiNavpJmPp0RnpCpyRNSsuj0H3Pxs+X/EW7XnCgenW7zu+ w==; X-IronPort-AV: E=McAfee;i="6400,9594,10310"; a="322046001" X-IronPort-AV: E=Sophos;i="5.90,242,1643702400"; d="scan'208";a="322046001" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Apr 2022 08:31:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,242,1643702400"; d="scan'208";a="659104852" Received: from npg-dpdk-xuan-cbdma.sh.intel.com ([10.67.110.228]) by orsmga004.jf.intel.com with ESMTP; 07 Apr 2022 08:31:11 -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 v1 0/5] vhost: support async dequeue data path Date: Thu, 7 Apr 2022 15:25:41 +0000 Message-Id: <20220407152546.38167-1-xuan.ding@intel.com> X-Mailer: git-send-email 2.17.1 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 implements vhost async dequeue data path for split ring. 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 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 | 459 ++++++++++++++++++++++--- 10 files changed, 711 insertions(+), 148 deletions(-) -- 2.17.1