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Miller" , Jakub Kicinski , Paolo Abeni , Eric Dumazet , "Andrew Lunn" , Simon Horman CC: , , , , Leon Romanovsky , , , , , Mark Bloch Subject: [PATCH net-next v2 0/8] net/mlx5: HWS, Optimize matchers ICM usage Date: Sun, 22 Jun 2025 20:22:18 +0300 Message-ID: <20250622172226.4174-1-mbloch@nvidia.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF00004FBF:EE_|LV2PR12MB5920:EE_ X-MS-Office365-Filtering-Correlation-Id: e5276fd5-f4d3-4e80-c3e0-08ddb1b1645c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|7416014|36860700013|1800799024|13003099007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?wbnL0JGRySXVAE2pwJxodRbCE3NjINAi6ykhCbFMBv1dZZhnHK4Bu+4zBkGA?= =?us-ascii?Q?gI/+OYhXUZY1HI3sUNIqNCHkwuOd2yq2twMJ36lXaIJbm0RYQR4vRT13d8cv?= =?us-ascii?Q?tZ2wiRnRaX1UU7nHTJGiDd64lU/WGA7M+otbIZ4jN9MVZRT7bxjuTjfbq1+z?= =?us-ascii?Q?CowE72OJiRhdDREuKKlhp+txyouh+lVI5hb4hUGX/sfWcGPCoYXJElsZCgu7?= =?us-ascii?Q?vxtUi7FexPudYPt1gMWFOoUd67l0xqaVSs4s/X/rRgHEIXfzKPfN2m7+eIze?= =?us-ascii?Q?3MBBpbWNLjXbFto0+ftNIt6Sim6iiY9UTZ3XdUo75SuQ7RtIXsABYnEuJ2ng?= =?us-ascii?Q?dXrwEEHJmyiT8dm/X+uJn8yKqKksvQQZYHufyE8V0M5bCLW5qicG1QSRV7P2?= =?us-ascii?Q?oTBnSHbyQe9vTBRiLnjPgm0fNOxWk+L6+mazQUCpCLY+VolZVYAS/JpLYuZH?= =?us-ascii?Q?FKeuyl+1FmX+yvZ3su2ISh13eTbv9udfxDSBEBNfhQrvtgoi0B7t8UlCBEN4?= =?us-ascii?Q?0+fCCylkz57u657I8FfxkwCPa+o6b/vgbKgSGsSeVPMVeVAXBCDOxnGLb6oz?= =?us-ascii?Q?/RIGaK7RjhpcLm250X3JJzS5mvFeWgNxpZDDYKLEuUi2Gresq3yDaIglAnnW?= =?us-ascii?Q?lR3I67DjkoeuPKTd4PoVs9ywBJiiDnVnv4ZiZcRWrUAxrRmlqXDXXzTOLaCG?= =?us-ascii?Q?B5mlctKgSua6qzt2+h4cWfPNWQo1QMOCB7xP/rUREzlGSrWqJmvnxu0kt07O?= =?us-ascii?Q?aVP1G82K6pUkFBkQ1VZtZYIypXRuxT516+cGdCMeQUcLKKwjSUtUK0+pUfg3?= =?us-ascii?Q?qV36YBPS4Gdsiindxw3z+9GQf2w5xb3+PTLqABVaC4ravihNb7lrRvrGQAus?= =?us-ascii?Q?RheohN2kWAyB8DDhr0RFF994mcBZ9xVs5mDTvXQY8ypqD2KYllek8OFlfg3i?= =?us-ascii?Q?TngcbdpKPcS160Nk2BSypKfOEwyBfHeUOcz6fMb4Y1IdkNrdaDzAj2dK2EYF?= =?us-ascii?Q?NEMSHlnH4tPmUujEmVw2ord6kTnv+ZwdnXmNCSD+ayl3XYoOlSzGqCS9Rlbg?= =?us-ascii?Q?7DfzTaBNzGKOK8DJHzfsZkJieny5ZAj1A9s86OU29PSriudFViRCpfbs6cO0?= =?us-ascii?Q?ihFmJ5BYwbc5SBSIJWlmxSCdDMHohMwN32IipFjkWHG9zdZBZx/DYqe3ykAt?= =?us-ascii?Q?0wxNc+CDMKu04K1ArDlWEmy8BGXq3br66ANKsMx9XrAgkkM0glko0hZtYOb4?= =?us-ascii?Q?Nc6L67a0ckn7UQcaVG3PMD+A0E3q9icFnyXe2zX6qDJGggPYu7wN67HJsyCl?= =?us-ascii?Q?4uML1HTSvXTUny+33opWt4sA5CGBFo8p5IJvWk7ij+9C2tQYT6wShLF6iISG?= =?us-ascii?Q?u+w8eSzjSrpBuIjnRTN6lFsisZ7HQOeTUyvlUXjgJ44srCl16Jci9omVJI+W?= =?us-ascii?Q?g3Lwr6sdHbzJEEC1nwgl9U1HfWpM3nYHqde/N22S6p2EhYYdtNE8VuhmOXMh?= =?us-ascii?Q?WSknY4+iQ3r2luIZyt1nlXtwLNPu1etyi15S/19+v19zXTnLZfIaf8/uXw?= =?us-ascii?Q?=3D=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(82310400026)(7416014)(36860700013)(1800799024)(13003099007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Jun 2025 17:22:40.5778 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e5276fd5-f4d3-4e80-c3e0-08ddb1b1645c X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF00004FBF.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV2PR12MB5920 This series optimizes ICM usage for unidirectional rules and empty matchers and with the last patch we make hardware steering the default FDB steering provider for NICs that don't support software steering. Hardware steering (HWS) uses a type of rule table container (RTC) that is unidirectional, so matchers consist of two RTCs to accommodate bidirectional rules. This small series enables resizing the two RTCs independently by tracking the number of rules separately. For extreme cases where all rules are unidirectional, this results in saving close to half the memory footprint. Results for inserting 1M unidirectional rules using a simple module: Pages Memory Before this patch: 300k 1.5GiB After this patch: 160k 900MiB The 'Pages' column measures the number of 4KiB pages the device requests for itself (the ICM). The 'Memory' column is the difference between peak usage and baseline usage (before starting the test) as reported by `free -h`. In addition, second to last patch of the series handles a case where all the matcher's rules were deleted: the large RTCs of the matcher are no longer required, and we can save some more ICM by shrinking the matcher to its initial size. Finally the last patch makes hardware steering the default mode when in swichdev for NICs that don't have software steering support. Changelog ========= Changes from v1 [0]: - Fixed author on patches 5 and 6. References ========== [0] v1: https://lore.kernel.org/all/20250619115522.68469-1-mbloch@nvidia.com/ Moshe Shemesh (1): net/mlx5: Add HWS as secondary steering mode Vlad Dogaru (5): net/mlx5: HWS, remove unused create_dest_array parameter net/mlx5: HWS, Refactor and export rule skip logic net/mlx5: HWS, Create STEs directly from matcher net/mlx5: HWS, Decouple matcher RX and TX sizes net/mlx5: HWS, Track matcher sizes individually Yevgeny Kliteynik (2): net/mlx5: HWS, remove incorrect comment net/mlx5: HWS, Shrink empty matchers .../net/ethernet/mellanox/mlx5/core/fs_core.c | 2 + .../mellanox/mlx5/core/steering/hws/action.c | 7 +- .../mellanox/mlx5/core/steering/hws/bwc.c | 284 ++++++++++++++---- .../mellanox/mlx5/core/steering/hws/bwc.h | 14 +- .../mellanox/mlx5/core/steering/hws/debug.c | 20 +- .../mellanox/mlx5/core/steering/hws/fs_hws.c | 15 +- .../mellanox/mlx5/core/steering/hws/matcher.c | 166 ++++++---- .../mellanox/mlx5/core/steering/hws/matcher.h | 3 +- .../mellanox/mlx5/core/steering/hws/mlx5hws.h | 36 ++- .../mellanox/mlx5/core/steering/hws/rule.c | 35 +-- .../mellanox/mlx5/core/steering/hws/rule.h | 3 + 11 files changed, 403 insertions(+), 182 deletions(-) base-commit: 091d019adce033118776ef93b50a268f715ae8f6 -- 2.34.1