On 30.08.24 12:58, Dragos Tatulea wrote: > 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@xxxxxxxxxx/ > > --- > 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. Gentle ping for the remaining patches in v2. Thanks, Dragos
