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helo=oa.msg.ericsson.com; pr=C", "From": "=?utf-8?q?Mattias_R=C3=B6nnblom?= <mattias.ronnblom@ericsson.com>", "To": "<jerinj@marvell.com>", "CC": "Jerin Jacob <jerinjacobk@gmail.com>, <hofors@lysator.liu.se>,\n <dev@dpdk.org>, <harry.van.haaren@intel.com>, <peter.j.nilsson@ericsson.com>,\n Stephen Hemminger <stephen@networkplumber.org>,\n Heng Wang <heng.wang@ericsson.com>,\n =?utf-8?q?Mattias_R=C3=B6nnblom?= <mattias.ronnblom@ericsson.com>", "Subject": "[PATCH 0/3] Add event dispatcher", "Date": "Wed, 14 Jun 2023 19:25:24 +0200", "Message-ID": "<20230614172527.157664-1-mattias.ronnblom@ericsson.com>", "X-Mailer": "git-send-email 2.34.1", "In-Reply-To": "<20230609070826.149336-2-mattias.ronnblom@ericsson.com>", "References": "<20230609070826.149336-2-mattias.ronnblom@ericsson.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"UTF-8\"", "Content-Transfer-Encoding": "8bit", "X-EOPAttributedMessage": "0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "VI1EUR02FT033:EE_|AM8PR07MB8247:EE_", "X-MS-Office365-Filtering-Correlation-Id": "50fe44cb-675d-4721-efb2-08db6cfd3955", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "BCL:0;", "X-Microsoft-Antispam-Message-Info": "\n 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", "X-Forefront-Antispam-Report": "CIP:192.176.1.74; CTRY:SE; LANG:en; SCL:1; SRV:;\n IPV:NLI; SFV:NSPM; H:oa.msg.ericsson.com; PTR:office365.se.ericsson.net;\n CAT:NONE;\n SFS:(13230028)(4636009)(396003)(376002)(136003)(39860400002)(346002)(451199021)(36840700001)(46966006)(40470700004)(26005)(1076003)(356005)(7636003)(82960400001)(82740400003)(107886003)(2616005)(36756003)(40460700003)(6266002)(86362001)(186003)(40480700001)(82310400005)(36860700001)(66574015)(47076005)(5660300002)(6666004)(2906002)(54906003)(41300700001)(478600001)(8676002)(8936002)(4326008)(6916009)(70206006)(70586007)(316002)(336012);\n DIR:OUT; SFP:1101;", "X-OriginatorOrg": "ericsson.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "14 Jun 2023 17:31:44.6734 (UTC)", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n 50fe44cb-675d-4721-efb2-08db6cfd3955", "X-MS-Exchange-CrossTenant-Id": "92e84ceb-fbfd-47ab-be52-080c6b87953f", "X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp": "\n TenantId=92e84ceb-fbfd-47ab-be52-080c6b87953f; Ip=[192.176.1.74];\n Helo=[oa.msg.ericsson.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n VI1EUR02FT033.eop-EUR02.prod.protection.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "AM8PR07MB8247", "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": "The purpose of the event dispatcher is to decouple different parts of\nan application (e.g., processing pipeline stages), sharing the same\nunderlying event device.\n\nThe event dispatcher replaces the conditional logic (often, a switch\nstatement) that typically follows an event device dequeue operation,\nwhere events are dispatched to different parts of the application\nbased on event meta data, such as the queue id or scheduling type.\n\nThe concept is similar to a UNIX file descriptor event loop library.\nInstead of tying callback functions to fds as for example libevent\ndoes, the event dispatcher relies on application-supplied matching\ncallback functions to decide where to deliver events.\n\nAn event dispatcher is configured to dequeue events from a specific\nevent device, and ties into the service core framework, to do its (and\nthe application's) work.\n\nThe event dispatcher provides a convenient way for an eventdev-based\napplication to use service cores for application-level processing, and\nthus for sharing those cores with other DPDK services.\n\nAlthough the event dispatcher adds some overhead, experience suggests\nthat the net effect on the application (both synthetic benchmarks and\nmore real-world applications) may well be positive. This is primarily\ndue to clustering (see programming guide) reducing cache misses.\n\nBenchmarking indicates that the overhead is ~10 cc/event (on a\nlarge core), with a handful of active handlers.\n\nThe event dispatcher does not support run-time reconfiguration.\n\nMattias Rönnblom (3):\n eventdev: introduce event dispatcher\n test: add event dispatcher test suite\n doc: add event dispatcher programming guide\n\n app/test/meson.build | 1 +\n app/test/test_event_dispatcher.c | 861 +++++++++++++++++++++\n doc/api/doxy-api-index.md | 1 +\n doc/guides/prog_guide/event_dispatcher.rst | 443 +++++++++++\n doc/guides/prog_guide/index.rst | 1 +\n lib/eventdev/meson.build | 2 +\n lib/eventdev/rte_event_dispatcher.c | 770 ++++++++++++++++++\n lib/eventdev/rte_event_dispatcher.h | 448 +++++++++++\n lib/eventdev/version.map | 13 +\n 9 files changed, 2540 insertions(+)\n create mode 100644 app/test/test_event_dispatcher.c\n create mode 100644 doc/guides/prog_guide/event_dispatcher.rst\n create mode 100644 lib/eventdev/rte_event_dispatcher.c\n create mode 100644 lib/eventdev/rte_event_dispatcher.h" }