Message ID | 20220101001244.90147-1-xuan.ding@intel.com (mailing list archive) |
---|---|
Headers |
Return-Path: <dev-bounces@dpdk.org> 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 E7B1FA00C2; Fri, 31 Dec 2021 16:36:33 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 768B74069D; Fri, 31 Dec 2021 16:36:33 +0100 (CET) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by mails.dpdk.org (Postfix) with ESMTP id E9C6E4067E for <dev@dpdk.org>; Fri, 31 Dec 2021 16:36:31 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1640964992; x=1672500992; h=from:to:cc:subject:date:message-id; bh=RYXpt5VHYwSZElr7a9kgPSAjfNivx9RsHojvSnzgn80=; b=fd4WXrswbyhjEWIq1rFca7ZDqUvfMft4j46wDVGQJxBHcVg7VTFlOXrt D0jEtvIDg0WDhh7o4sNfovoc9ck1oHmOF6dN0RTWgRvkvfig5PM5pXEsM sW8MCNKHbeGK19wSiXu8Y0TwN4+NHDzOMiXn5zNkrc5LtA4xuxTIJcC75 005S0K4JPndWiXdJDtZwJjEdDDmKJodAzLtK6M757J3+A7pE4xIEOsWkH 7aP57/WC1QJdmG+KfiLVrAvxyOwYOCt/FWYe8PlAPkX5rGSE8OHqHBzFt efsuOW7WUcRB2kz5dBGeKWHRYOEwtv6xIlylV8n/bPvZuyopRMGDnLx4y Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10213"; a="240608934" X-IronPort-AV: E=Sophos;i="5.88,251,1635231600"; d="scan'208";a="240608934" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Dec 2021 07:36:30 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,251,1635231600"; d="scan'208";a="524765490" Received: from npg-dpdk-xuan-cbdma.sh.intel.com ([10.67.110.228]) by orsmga008.jf.intel.com with ESMTP; 31 Dec 2021 07:36:27 -0800 From: xuan.ding@intel.com To: maxime.coquelin@redhat.com, chenbo.xia@intel.com Cc: dev@dpdk.org, jiayu.hu@intel.com, sunil.pai.g@intel.com, liangma@liangbit.com, yuanx.wang@intel.com, cheng1.jiang@intel.com, wenwux.ma@intel.com, Xuan Ding <xuan.ding@intel.com> Subject: [RFC 0/2] vhost: support async dequeue data path Date: Sat, 1 Jan 2022 00:12:42 +0000 Message-Id: <20220101001244.90147-1-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 <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org |
Series |
vhost: support async dequeue data path
|
|
Message
Ding, Xuan
Jan. 1, 2022, 12:12 a.m. UTC
From: Xuan Ding <xuan.ding@intel.com>
Hi everyone,
The presence of an 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
is introduced in 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 dma_vchan)
Receive packets from the guest and offloads copies to DMA
virtual channel.
[1] https://mails.dpdk.org/archives/dev/2021-December/231889.html.
[2] https://mails.dpdk.org/archives/dev/2021-September/218591.html.
Your comments are welcomed and appreciated!
Thanks!
Xuan
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 | 305 ++++++++++++------
examples/vhost/main.h | 35 +-
examples/vhost/virtio_net.c | 16 +-
lib/vhost/rte_vhost_async.h | 29 ++
lib/vhost/version.map | 1 +
lib/vhost/vhost.h | 1 +
lib/vhost/virtio_net.c | 493 +++++++++++++++++++++++++++++
8 files changed, 783 insertions(+), 106 deletions(-)