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(seliicwb00002.seli.gic.ericsson.se [10.156.25.100]) by seliicinfr00050.seli.gic.ericsson.se (Postfix) with ESMTP id C39DE1C006A; Mon, 19 Feb 2024 10:48:31 +0100 (CET) From: =?UTF-8?q?Mattias=20R=C3=B6nnblom?= To: CC: , =?UTF-8?q?Morten=20Br=C3=B8rup?= , Stephen Hemminger , =?UTF-8?q?Mattias=20R=C3=B6nnblom?= Subject: [RFC v2 0/5] Lcore variables Date: Mon, 19 Feb 2024 10:40:31 +0100 Message-ID: <20240219094036.485727-1-mattias.ronnblom@ericsson.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240208181644.455233-2-mattias.ronnblom@ericsson.com> References: <20240208181644.455233-2-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: DU6PEPF0000B61E:EE_|PR3PR07MB8181:EE_ X-MS-Office365-Filtering-Correlation-Id: 761a7cd9-219f-4e13-8aca-08dc312fef1d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:192.176.1.74; CTRY:SE; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:oa.msg.ericsson.com; PTR:office365.se.ericsson.net; CAT:NONE; SFS:(13230031)(4636009)(376002)(136003)(39860400002)(396003)(346002)(230922051799003)(451199024)(64100799003)(186009)(82310400011)(36860700004)(1800799012)(40470700004)(46966006)(83380400001)(86362001)(36756003)(2616005)(54906003)(41300700001)(316002)(6266002)(5660300002)(336012)(2906002)(478600001)(70206006)(70586007)(107886003)(1076003)(8936002)(8676002)(6916009)(4326008)(26005)(7636003)(356005)(82740400003)(82960400001); DIR:OUT; SFP:1101; X-OriginatorOrg: ericsson.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Feb 2024 09:48:32.3744 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 761a7cd9-219f-4e13-8aca-08dc312fef1d X-MS-Exchange-CrossTenant-Id: 92e84ceb-fbfd-47ab-be52-080c6b87953f X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=92e84ceb-fbfd-47ab-be52-080c6b87953f; Ip=[192.176.1.74]; Helo=[oa.msg.ericsson.com] X-MS-Exchange-CrossTenant-AuthSource: DU6PEPF0000B61E.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PR3PR07MB8181 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 This RFC presents a new API for static per-lcore id data allocation. Please refer to the API documentation for both a rationale for this new API, and a comparison to the alternatives available. The adoption of this API would affect many different DPDK modules, but the author updated only a few, mostly to serve as examples in this RFC, and to iron out some, but surely not all, wrinkles in the API. The question on how to best allocate static per-lcore memory has been up several times on the dev mailing list, for example in the thread on "random: use per lcore state" RFC by Stephen Hemminger. Lcore variables are surely not the answer to all your per-lcore-data needs, since it only allows for more-or-less static allocation. In the author's opinion, it does however provide a reasonably simple and clean and seemingly very much performant solution to a real problem. One thing is unclear to the author is how this API relates to potential future per-lcore dynamic allocator (e.g., a per-lcore heap). Contrary to what the version.map edit suggests, this RFC is not meant for a proposal for DPDK 24.03. Mattias Rönnblom (5): eal: add static per-lcore memory allocation facility eal: add lcore variable test suite random: keep PRNG state in lcore variable power: keep per-lcore state in lcore variable service: keep per-lcore state in lcore variable app/test/meson.build | 1 + app/test/test_lcore_var.c | 408 ++++++++++++++++++++++++++ config/rte_config.h | 1 + doc/api/doxy-api-index.md | 1 + lib/eal/common/eal_common_lcore_var.c | 82 ++++++ lib/eal/common/meson.build | 1 + lib/eal/common/rte_random.c | 30 +- lib/eal/common/rte_service.c | 119 ++++---- lib/eal/include/meson.build | 1 + lib/eal/include/rte_lcore_var.h | 374 +++++++++++++++++++++++ lib/eal/version.map | 4 + lib/power/rte_power_pmd_mgmt.c | 27 +- 12 files changed, 973 insertions(+), 76 deletions(-) create mode 100644 app/test/test_lcore_var.c create mode 100644 lib/eal/common/eal_common_lcore_var.c create mode 100644 lib/eal/include/rte_lcore_var.h -- 2.34.1