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Fri, 30 Aug 2024 03:58:53 -0700 From: Dragos Tatulea To: "Michael S . Tsirkin" , Jason Wang , Eugenio Perez Martin , Si-Wei Liu , , Gal Pressman CC: Dragos Tatulea , , , Parav Pandit , Xuan Zhuo Subject: [PATCH vhost v2 0/7] vdpa/mlx5: Optimze MKEY operations Date: Fri, 30 Aug 2024 13:58:31 +0300 Message-ID: <20240830105838.2666587-2-dtatulea@nvidia.com> X-Mailer: git-send-email 2.45.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF000000A0:EE_|BL1PR12MB5899:EE_ X-MS-Office365-Filtering-Correlation-Id: 5be214a2-7cb9-4835-38ad-08dcc8e2c4a3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|36860700013|82310400026; X-Microsoft-Antispam-Message-Info: =?utf-8?B?K2RSMGxQV1FXRmZkZktwcWJRdVFvaU1ROTUrSUdKeGlzM2cxbUlmNy9QMTdj?= =?utf-8?B?QkEzbzIyNnVzc2NOcHJmQ1dORjdZUFhCKyt4d2dkY05QUEprNlFnQmxLR2dZ?= =?utf-8?B?WDFVWmdUVXFjQWcwbmlqc0VoQ0gweGhGYWprZi9lQ1I5N1U5YllOemt1a29I?= =?utf-8?B?eUt3TFp0QVdyV3R3SnBEUXFEbTlicXF2YVJISCsyVmlibmM5dkNOemJNcE1h?= =?utf-8?B?NXU0aWpRbXFXbytoRnNsaENEbm8wVVFtYmFPdDY0WFVZUW5GSm5KQk5YYWdz?= =?utf-8?B?ZEE1aG1ZWTdjYm85eFY4MDRhTnkvVGlBcnpCdTZCOWtqanN1WVo5dnBQQkxm?= =?utf-8?B?TDhrVmkydFg0YVM0VW1sdHp4bVRPZ21XNFd4T3daU1FsZFA5SzFWenova1Zq?= =?utf-8?B?VWp6TzdZZGlJczRGM2duemFSWjZ4V1lSUy9WR212WFdjbFJoOW55Q3BqaGt3?= =?utf-8?B?UEhDUi9STFE2eHkwOG1XWjVlS3hJZlRVSjMzVnorbU1zY3VTYmJGTDg2RkV5?= =?utf-8?B?c2t6dVg2bDFLR29sT3BiWFZjMGY4eko1cEVPMForK3IwRFRIMzJXSm9nUnBC?= =?utf-8?B?bGc0MEpkZUlkdjBBZ3RWcDRlcDdBV2NObWQyWVJjZDNwcjhsemlScDVFRkxN?= =?utf-8?B?RlpqbE1lc2VxOFVkTENkbENiVzl2WWlpd3llYzVCbU1kVHYrYk9ka3lXZU9E?= =?utf-8?B?UmxXRDZzQy8zMjduc0NzK3ljL0x3M0xPRzl4Unl1Q0UreHNpVWxkMDl4amFh?= =?utf-8?B?ODRtdGtRbTlLVzNWUU5OMTdZSitxU3NXWWJDWjd4dFA5TjZlMTdRcnkzb3FL?= =?utf-8?B?Y29Nd1UzRlB3cjFGSnVtUjVMbFoyQnVRNjY5L3JhRTBzYW5TNFVIWkg2MU4y?= =?utf-8?B?TDVXWHNyZWg0R0FIbldqWWFxSHQwM0dYSkJNMVhmQk1HYlFaaEo4OFpPRUp2?= =?utf-8?B?dlYyQzJLZ25ZVHBGUEczUDRqeU5FWG1oTGRRcllpK2lLdnJ0ZnEwMnJZN3hB?= =?utf-8?B?TllEWXRzTzlNNTRQaStYYno1SDVIbFV4eEFKcms4TWxXL0xRM2gxMGZaanRp?= =?utf-8?B?UkpwbGZZSTFBTlErejZFb29LeEs3azlnN3hwcWh5MmgzZTU2ejEzc1NpUGxC?= =?utf-8?B?aE1qa1lFeEp4bUdNT1JsZU1TclRSKzAvYU4zL0hOWlUzRlpvaVVBY0J2Q0Vr?= =?utf-8?B?THRZZG8xcmVzdHc2VmE3cC9pampmc0ZCeURzQk0yNHBkNUdnbmYxK1NUUFpq?= =?utf-8?B?WGc3cVJwSzNyLzlJcVpBcmxjWXI4N3k0YTRmQXkxOHBZWWhUamtNYnU1SXh4?= =?utf-8?B?SE5VaW5laEw0eWJOcGhKd1NIa0NqOTJEai90b0tUdDN5RS9XeHAyRCtkSDJY?= =?utf-8?B?VnA0SlJXUU5XV0xjenh6SENrdmxSTjd2SnA0cG1sTjlGZENLS0NRR1pNcDVK?= =?utf-8?B?aFVlaTdlZ1U0OTI2SkZVZklETnphNCtld3V4QWZCWGIrYVFsWmZnS084a0lw?= =?utf-8?B?ZnA5dzhudTdzcmMzQ3hyL1VBMnNxR1ZHbmdjUzgzUUFqeU5BTHdXQnNLT2tI?= =?utf-8?B?d1RwY0Nmc1ZEYTJ6SVFESlFGcHdXZThGd1VTUThxenhKbFBuRER6VnA4bHY5?= =?utf-8?B?d0IwaUZuZlFBWnNYY3BiU295b3lYNnJ3T01jazZuNE1DOFpyRWZ0NFRjV3k5?= =?utf-8?B?eVpUaGE4cms3RjBWaWFLY3RtTmNRdjk5TCtqUlIydHVFRml5cGhsVmg1bmox?= =?utf-8?B?S1l3TWpKeEh5L2xDUDRMVTZ6VEVZekR5dm42WUllYW5sMW9WZ2Npbitublhk?= =?utf-8?B?MTdPczUzeDh2NnZ0WFR2TCsrd0htOGRJajBqRGJIVmRWM0phL1hsc1ZTWXFn?= =?utf-8?B?MWJwMHlMQ3JmRnBuVnZ3TGdFMGFkSjBHT3hyelE5SklTM05KelNQaHZ5ek5z?= =?utf-8?Q?G9J/mdAg31Jp1jFq9GZpchvZK7Inxp80?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(1800799024)(36860700013)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Aug 2024 10:59:06.5400 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5be214a2-7cb9-4835-38ad-08dcc8e2c4a3 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF000000A0.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5899 This series improves the time of .set_map() operations by parallelizing the MKEY creation and deletion for direct MKEYs. Looking at the top level MKEY creation/deletion functions, the following improvement can be seen: |-------------------+-------------| | operation | improvement | |-------------------+-------------| | create_user_mr() | 3-5x | | destroy_user_mr() | 8x | |-------------------+-------------| The last part of the series introduces lazy MKEY deletion which postpones the MKEY deletion to a later point in a workqueue. As this series and the previous ones were targeting live migration, we can also observe improvements on this front: |-------------------+------------------+------------------| | Stage | Downtime #1 (ms) | Downtime #2 (ms) | |-------------------+------------------+------------------| | Baseline | 3140 | 3630 | | Parallel MKEY ops | 1200 | 2000 | | Deferred deletion | 1014 | 1253 | |-------------------+------------------+------------------| Test configuration: 256 GB VM, 32 CPUs x 2 threads per core, 4 x mlx5 vDPA devices x 32 VQs (16 VQPs) This series must be applied on top of the parallel VQ suspend/resume series [0]. [0] https://lore.kernel.org/all/20240816090159.1967650-1-dtatulea@nvidia.com/ --- v2: - Swapped flex array usage for plain zero length array in first patch. - Updated code to use Scope-Based Cleanup Helpers where appropriate (only second patch). - Added macro define for MTT alignment in first patch. - Improved commit messages/comments based on review comments. - Removed extra newlines. --- Dragos Tatulea (7): vdpa/mlx5: Create direct MKEYs in parallel vdpa/mlx5: Delete direct MKEYs in parallel vdpa/mlx5: Rename function vdpa/mlx5: Extract mr members in own resource struct vdpa/mlx5: Rename mr_mtx -> lock vdpa/mlx5: Introduce init/destroy for MR resources vdpa/mlx5: Postpone MR deletion drivers/vdpa/mlx5/core/mlx5_vdpa.h | 25 ++- drivers/vdpa/mlx5/core/mr.c | 288 +++++++++++++++++++++++++---- drivers/vdpa/mlx5/core/resources.c | 3 - drivers/vdpa/mlx5/net/mlx5_vnet.c | 53 +++--- 4 files changed, 296 insertions(+), 73 deletions(-) -- 2.45.1