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{ "id": 88030, "url": "https://patches.dpdk.org/api/covers/88030/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/cover/20210220220957.4583-1-pbhagavatula@marvell.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": "<20210220220957.4583-1-pbhagavatula@marvell.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20210220220957.4583-1-pbhagavatula@marvell.com", "date": "2021-02-20T22:09:49", "name": "[0/7] Introduce event vectorization", "submitter": { "id": 1183, "url": "https://patches.dpdk.org/api/people/1183/?format=api", "name": "Pavan Nikhilesh Bhagavatula", "email": "pbhagavatula@marvell.com" }, "mbox": "https://patches.dpdk.org/project/dpdk/cover/20210220220957.4583-1-pbhagavatula@marvell.com/mbox/", "series": [ { "id": 15316, "url": "https://patches.dpdk.org/api/series/15316/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/list/?series=15316", "date": "2021-02-20T22:09:49", "name": "Introduce event vectorization", "version": 1, "mbox": "https://patches.dpdk.org/series/15316/mbox/" } ], "comments": "https://patches.dpdk.org/api/covers/88030/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 C1AFDA0524;\n\tSat, 20 Feb 2021 23:10:08 +0100 (CET)", "from [217.70.189.124] (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id 4305A40140;\n\tSat, 20 Feb 2021 23:10:08 +0100 (CET)", "from mx0b-0016f401.pphosted.com (mx0a-0016f401.pphosted.com\n [67.231.148.174])\n by mails.dpdk.org (Postfix) with ESMTP id 1FB084003C\n for <dev@dpdk.org>; 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d=marvell.com;\n h=from : to : cc :\n subject : date : message-id : mime-version : content-transfer-encoding :\n content-type; s=pfpt0220; bh=MrkF0KAU6aB69zxybYe2aueBA0AS7aLe9QXkinsIUzo=;\n b=RD45F0TVnh8k8dFSDnZolhbD/HevGydxbZEcNPv0WrXjkvR2Tnlpqeu5YIv8hObw574k\n 416NGgu1Jo404rENyINksvBGN+CXfpi4tlDDbotLsTGmCIIln/edzGDojJWNADJlzGUp\n bvyMdQ7MDPrmMff4Yq1GCfrUHd/ggdIpRMKtBn695ttxlDqTGlS7wdbHp8iGz5Z8WLS1\n iEWVJgx3CKJglY51BP8D9N+y/oojw9UBIhvRE9QkaEiSW24PLzs74+oEy3JF9Pds3OdZ\n 1hF8Ifdi5zTf77qfl4RRZtlQmtmvtlxbkyatPRuNaYkcbmaMkQKr40OEdEaNgOQqaHV6 nQ==", "From": "<pbhagavatula@marvell.com>", "To": "<jerinj@marvell.com>, <jay.jayatheerthan@intel.com>,\n <erik.g.carrillo@intel.com>, <abhinandan.gujjar@intel.com>,\n <timothy.mcdaniel@intel.com>, <hemant.agrawal@nxp.com>,\n <harry.van.haaren@intel.com>, <mattias.ronnblom@ericsson.com>,\n <liang.j.ma@intel.com>", "CC": "<dev@dpdk.org>, Pavan Nikhilesh <pbhagavatula@marvell.com>", "Date": "Sun, 21 Feb 2021 03:39:49 +0530", "Message-ID": "<20210220220957.4583-1-pbhagavatula@marvell.com>", "X-Mailer": "git-send-email 2.17.1", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-Proofpoint-Virus-Version": "vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761\n definitions=2021-02-20_03:2021-02-18,\n 2021-02-20 signatures=0", "Subject": "[dpdk-dev] [PATCH 0/7] Introduce event vectorization", "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", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "From: Pavan Nikhilesh <pbhagavatula@marvell.com>\n\nIn traditional event programming model, events are identified by a\nflow-id and a uintptr_t. The flow-id uniquely identifies a given event\nand determines the order of scheduling based on schedule type, the\nuintptr_t holds a single object.\n\nEvent devices also support burst mode with configurable dequeue depth,\ni.e. each dequeue call would return multiple events and each event\nmight be at a different stage of the pipeline.\nHaving a burst of events belonging to different stages in a dequeue\nburst is not only difficult to vectorize but also increases the scheduler\noverhead and application overhead of pipelining events further.\nUsing event vectors we see a performance gain of ~150% as shown in [1].\n\nBy introducing event vectorization, each event will be capable of holding\nmultiple uintptr_t of the same flow thereby allowing applications\nto vectorize their pipeline and reduce the complexity of pipelining\nevents across multiple stages. This also reduces the complexity of handling\nenqueue and dequeue on an event device.\n\nSince event devices are transparent to the events they are scheduling\nso the event producers such as eth_rx_adapter, crypto_adapter , etc..\nare responsible for vectorizing the buffers of the same flow into a single\nevent.\n\nThe series also breaks ABI in [2/7] patch which we fix in [7/7]. The patch\n[7/7] can be changed in the next major release i.e. v21.11.\n\nThe dpdk-test-eventdev application has been updated with options to test\nmultiple vector sizes and timeouts.\n\n[1]\nAs for performance improvement, with a ARM Cortex-A72 equivalent processer,\nsoftware event device (--vdev=event_sw0), single worker core, single stage\nand using one service core for Rx adapter, Tx adapter, Scheduling.\n\nWithout event vectorization:\n ./build/app/dpdk-test-eventdev -l 7-23 -s 0x700 --vdev=\"event_sw0\" --\n --prod_type_ethdev --nb_pkts=0 --verbose 2 --test=pipeline_queue\n --stlist=a --wlcores=20\n Port[0] using Rx adapter[0] configured\n Port[0] using Tx adapter[0] Configured\n 4.728 mpps avg 4.728 mpps\n\nWith event vectorization:\n ./build/app/dpdk-test-eventdev -l 7-23 -s 0x700 --vdev=\"event_sw0\" --\n --prod_type_ethdev --nb_pkts=0 --verbose 2 --test=pipeline_queue\n --stlist=a --wlcores=20 --enable_vector --nb_eth_queues 1\n --vector_size 256\n Port[0] using Rx adapter[0] configured\n Port[0] using Tx adapter[0] Configured\n 34.383 mpps avg 34.383 mpps\n\nHaving dedicated service cores for each Rx queues and tweaking the vector,\ndequeue burst size would further improve performance.\n\nAPI usage is shown below:\n\nConfiguration:\n\n\tstruct rte_event_eth_rx_adapter_event_vector_config vec_conf;\n\n\tvector_pool = rte_event_vector_pool_create(\"vector_pool\",\n\t\t\tnb_elem, 0, vector_size, socket_id);\n\n\trte_event_eth_rx_adapter_create(id, event_id, &adptr_conf);\n\trte_event_eth_rx_adapter_queue_add(id, eth_id, -1, &queue_conf);\n\tif (cap & RTE_EVENT_ETH_RX_ADAPTER_CAP_EVENT_VECTOR) {\n\t\tvec_conf.vector_sz = vector_size;\n\t\tvec_conf.vector_timeout_ns = vector_tmo_nsec;\n\t\tvec_conf.vector_mp = vector_pool;\n\t\trte_event_eth_rx_adapter_queue_event_vector_config(id,\n\t\t\t\teth_id, -1, &vec_conf);\n\t}\n\nFastpath:\n\n\tnum = rte_event_dequeue_burst(event_id, port_id, &ev, 1, 0);\n\tif (!num)\n\t\tcontinue;\n\n\tif (ev.event_type & RTE_EVENT_TYPE_VECTOR) {\n\t\tswitch (ev.event_type) {\n\t\tcase RTE_EVENT_TYPE_ETHDEV_VECTOR:\n\t\tcase RTE_EVENT_TYPE_ETH_RX_ADAPTER_VECTOR:\n\t\t\tstruct rte_mbuf **mbufs;\n\n\t\t\tmbufs = ev.vector_ev->mbufs;\n\t\t\tfor (i = 0; i < ev.vector_ev->nb_elem; i++)\n\t\t\t\t//Process mbufs.\n\t\t\tbreak;\n\t\tcase ...\n\t\t}\n\t}\n\t...\n\nPavan Nikhilesh (7):\n eventdev: introduce event vector capability\n eventdev: introduce event vector Rx capability\n eventdev: introduce event vector Tx capability\n eventdev: add Rx adapter event vector support\n eventdev: add Tx adapter event vector support\n app/eventdev: add event vector mode in pipeline test\n eventdev: fix ABI breakage due to event vector\n\n app/test-eventdev/evt_common.h | 4 +\n app/test-eventdev/evt_options.c | 52 +++\n app/test-eventdev/evt_options.h | 4 +\n app/test-eventdev/test_pipeline_atq.c | 310 +++++++++++++--\n app/test-eventdev/test_pipeline_common.c | 77 +++-\n app/test-eventdev/test_pipeline_common.h | 18 +\n app/test-eventdev/test_pipeline_queue.c | 320 +++++++++++++--\n .../prog_guide/event_ethernet_rx_adapter.rst | 38 ++\n .../prog_guide/event_ethernet_tx_adapter.rst | 12 +\n doc/guides/prog_guide/eventdev.rst | 36 +-\n doc/guides/tools/testeventdev.rst | 28 ++\n lib/librte_eventdev/eventdev_pmd.h | 60 ++-\n .../rte_event_eth_rx_adapter.c | 367 +++++++++++++++++-\n .../rte_event_eth_rx_adapter.h | 93 +++++\n .../rte_event_eth_tx_adapter.c | 66 +++-\n lib/librte_eventdev/rte_eventdev.c | 11 +-\n lib/librte_eventdev/rte_eventdev.h | 145 ++++++-\n lib/librte_eventdev/version.map | 5 +\n 18 files changed, 1560 insertions(+), 86 deletions(-)\n\n--\n2.17.1" }