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{ "id": 110643, "url": "https://patches.dpdk.org/api/covers/110643/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/cover/20220505062335.25445-1-xuan.ding@intel.com/", "project": { "id": 1, "url": "https://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20220505062335.25445-1-xuan.ding@intel.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20220505062335.25445-1-xuan.ding@intel.com", "date": "2022-05-05T06:23:30", "name": "[v4,0/5] vhost: support async dequeue data path", "submitter": { "id": 1401, "url": "https://patches.dpdk.org/api/people/1401/?format=api", "name": "Ding, Xuan", "email": "xuan.ding@intel.com" }, "mbox": "https://patches.dpdk.org/project/dpdk/cover/20220505062335.25445-1-xuan.ding@intel.com/mbox/", "series": [ { "id": 22784, "url": "https://patches.dpdk.org/api/series/22784/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/list/?series=22784", "date": "2022-05-05T06:23:30", "name": "vhost: support async dequeue data path", "version": 4, "mbox": "https://patches.dpdk.org/series/22784/mbox/" } ], "comments": "https://patches.dpdk.org/api/covers/110643/comments/", "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])\n\tby inbox.dpdk.org (Postfix) with ESMTP id 934A0A00BE;\n\tThu, 5 May 2022 08:30:48 +0200 (CEST)", "from [217.70.189.124] (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id 352CC40E5A;\n\tThu, 5 May 2022 08:30:48 +0200 (CEST)", "from mga02.intel.com (mga02.intel.com [134.134.136.20])\n by mails.dpdk.org (Postfix) with ESMTP id 4F05540042\n for <dev@dpdk.org>; Thu, 5 May 2022 08:30:46 +0200 (CEST)", "from orsmga007.jf.intel.com ([10.7.209.58])\n by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 04 May 2022 23:27:06 -0700", "from npg-dpdk-xuan-cbdma.sh.intel.com ([10.67.110.228])\n by orsmga007.jf.intel.com with ESMTP; 04 May 2022 23:27:04 -0700" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n d=intel.com; i=@intel.com; q=dns/txt; s=Intel;\n t=1651732246; x=1683268246;\n h=from:to:cc:subject:date:message-id:in-reply-to: references;\n bh=v+CNsPefYlmZc/v3iztnMBVHOsB6e2tNFxealVzDlwk=;\n b=jSmduZRpCtsj2hJ8O150oeiCGB+FpBj7+1s1ZoBEkxqlCcnCIveWZAul\n fkQaT/mnBq962hVkQef68Ze0CjDb17yWWitx4tGylQ/LuXFxrJIFZJ3u9\n jRDwTBLDVazCvIFy+CsR3AlQJsjlxAdnNtipMPMsjgwqhY2+9LV2FAjI2\n BnLtwXOQbAglXQsdFgG7XFJZjuU+frIJs44gd8ksLVbyy/OPdEXIdjlL3\n 4OTvSwTV8T8w20X9FXL0s5V6Xzen2an8ewF041NJQeYj45F3yHItCJ2Ey\n wspslw+BTBDUaFMsiIZIsXP/pr0kI0+5m0YtZR0x/Di/hTm2IvySHh5cC w==;", "X-IronPort-AV": [ "E=McAfee;i=\"6400,9594,10337\"; a=\"255488220\"", "E=Sophos;i=\"5.91,200,1647327600\"; d=\"scan'208\";a=\"255488220\"", "E=Sophos;i=\"5.91,200,1647327600\"; d=\"scan'208\";a=\"563092906\"" ], "X-ExtLoop1": "1", "From": "xuan.ding@intel.com", "To": "maxime.coquelin@redhat.com,\n\tchenbo.xia@intel.com", "Cc": "dev@dpdk.org, jiayu.hu@intel.com, cheng1.jiang@intel.com,\n sunil.pai.g@intel.com, liangma@liangbit.com,\n Xuan Ding <xuan.ding@intel.com>", "Subject": "[PATCH v4 0/5] vhost: support async dequeue data path", "Date": "Thu, 5 May 2022 06:23:30 +0000", "Message-Id": "<20220505062335.25445-1-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 <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n <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>,\n <mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org" }, "content": "From: Xuan Ding <xuan.ding@intel.com>\n\nThe presence of asynchronous path allows applications to offload memory\ncopies to DMA engine, so as to save CPU cycles and improve the copy\nperformance. This patch set implements vhost async dequeue data path\nfor split ring. The code is based on latest enqueue changes [1].\n\nThis patch set is a new design and implementation of [2]. Since dmadev\nwas introduced in DPDK 21.11, to simplify application logics, this patch\nintegrates dmadev in vhost. With dmadev integrated, vhost supports M:N\nmapping between vrings and DMA virtual channels. Specifically, one vring\ncan use multiple different DMA channels and one DMA channel can be\nshared by multiple vrings at the same time.\n\nA new asynchronous dequeue function is introduced:\n 1) rte_vhost_async_try_dequeue_burst(int vid, uint16_t queue_id,\n struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts,\n uint16_t count, int *nr_inflight,\n uint16_t dma_id, uint16_t vchan_id)\n\n Receive packets from the guest and offloads copies to DMA\nvirtual channel.\n\n[1] https://mails.dpdk.org/archives/dev/2022-February/234555.html\n[2] https://mails.dpdk.org/archives/dev/2021-September/218591.html\n\nv3->v4:\n* fix CI build warnings\n* adjust some indentation\n* pass vq instead of queue_id\n\nv2->v3:\n* fix mbuf not updated correctly for large packets\n\nv1->v2:\n* fix a typo\n* fix a bug in desc_to_mbuf filling\n\nRFC v3 -> v1:\n* add sync and async path descriptor to mbuf refactoring\n* add API description in docs\n\nRFC v2 -> RFC v3:\n* rebase to latest DPDK version\n\nRFC v1 -> RFC v2:\n* fix one bug in example\n* rename vchan to vchan_id\n* check if dma_id and vchan_id valid\n* rework all the logs to new standard\n\nXuan Ding (5):\n vhost: prepare sync for descriptor to mbuf refactoring\n vhost: prepare async for descriptor to mbuf refactoring\n vhost: merge sync and async descriptor to mbuf filling\n vhost: support async dequeue for split ring\n examples/vhost: support async dequeue data path\n\n doc/guides/prog_guide/vhost_lib.rst | 7 +\n doc/guides/rel_notes/release_22_07.rst | 4 +\n doc/guides/sample_app_ug/vhost.rst | 9 +-\n examples/vhost/main.c | 292 +++++++++++-----\n examples/vhost/main.h | 35 +-\n examples/vhost/virtio_net.c | 16 +-\n lib/vhost/rte_vhost_async.h | 33 ++\n lib/vhost/version.map | 3 +\n lib/vhost/vhost.h | 1 +\n lib/vhost/virtio_net.c | 467 ++++++++++++++++++++++---\n 10 files changed, 716 insertions(+), 151 deletions(-)" }