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(seliicwb00002.seli.gic.ericsson.se [10.156.25.100]) by seliicinfr00049.seli.gic.ericsson.se (Postfix) with ESMTP id 95D83380061; Tue, 17 Sep 2024 16:41:56 +0200 (CEST) From: =?UTF-8?q?Mattias=20R=C3=B6nnblom?= <mattias.ronnblom@ericsson.com> To: <dev@dpdk.org> CC: <hofors@lysator.liu.se>, =?UTF-8?q?Morten=20Br=C3=B8rup?= <mb@smartsharesystems.com>, Stephen Hemminger <stephen@networkplumber.org>, Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>, David Marchand <david.marchand@redhat.com>, Jerin Jacob <jerinj@marvell.com>, =?UTF-8?q?Mattias=20R=C3=B6nnblom?= <mattias.ronnblom@ericsson.com> Subject: [PATCH v5 0/7] Lcore variables Date: Tue, 17 Sep 2024 16:32:32 +0200 Message-ID: <20240917143239.724069-1-mattias.ronnblom@ericsson.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240916105210.721315-2-mattias.ronnblom@ericsson.com> References: <20240916105210.721315-2-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: DU6PEPF00009525:EE_|PA4PR07MB7711:EE_ X-MS-Office365-Filtering-Correlation-Id: 85c80ead-5df8-4550-0be1-08dcd726e207 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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CTRY:SE; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:oa.msg.ericsson.com; PTR:office365.se.ericsson.net; CAT:NONE; SFS:(13230040)(1800799024)(376014)(82310400026)(36860700013); DIR:OUT; SFP:1101; X-OriginatorOrg: ericsson.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Sep 2024 14:41:57.9828 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 85c80ead-5df8-4550-0be1-08dcd726e207 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: DU6PEPF00009525.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR07MB7711 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 This patch set introduces a new API <rte_lcore_var.h> for static per-lcore id data allocation. Please refer to the <rte_lcore_var.h> 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. Mattias Rönnblom (7): eal: add static per-lcore memory allocation facility eal: add lcore variable functional tests eal: add lcore variable performance test random: keep PRNG state in lcore variable power: keep per-lcore state in lcore variable service: keep per-lcore state in lcore variable eal: keep per-lcore power intrinsics state in lcore variable MAINTAINERS | 6 + app/test/meson.build | 2 + app/test/test_lcore_var.c | 432 ++++++++++++++++++ app/test/test_lcore_var_perf.c | 257 +++++++++++ config/rte_config.h | 1 + doc/api/doxy-api-index.md | 1 + .../prog_guide/env_abstraction_layer.rst | 45 +- doc/guides/rel_notes/release_24_11.rst | 14 + lib/eal/common/eal_common_lcore_var.c | 78 ++++ lib/eal/common/meson.build | 1 + lib/eal/common/rte_random.c | 28 +- lib/eal/common/rte_service.c | 115 ++--- lib/eal/include/meson.build | 1 + lib/eal/include/rte_lcore_var.h | 385 ++++++++++++++++ lib/eal/version.map | 2 + lib/eal/x86/rte_power_intrinsics.c | 17 +- lib/power/rte_power_pmd_mgmt.c | 34 +- 17 files changed, 1326 insertions(+), 93 deletions(-) create mode 100644 app/test/test_lcore_var.c create mode 100644 app/test/test_lcore_var_perf.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