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| author | Peter Daifuku <pdaifuku@nvidia.com> | 2020-08-20 21:45:26 -0400 |
|---|---|---|
| committer | mobile promotions <svcmobile_promotions@nvidia.com> | 2020-09-15 05:38:45 -0400 |
| commit | 036e000a17425e0569990f2aacae91b273392153 (patch) | |
| tree | 5fb6845c56652a6bf97f70411846c891cdfbfab3 /drivers/gpu/nvgpu/common/mm/vm.c | |
| parent | 1c34f50227e9f308491758482d88c3c2f6605ffb (diff) | |
nvgpu: add PD cache support for page-sized PTEs
Large buffers being mapped to GMMU end up needing many
pages for the PTE tables. Allocating these pages one
by one can end up being a performance bottleneck, particularly
in the virtualized case.
Add support for page-sized PTEs to the existing PD cache:
- define NVGPU_PD_CACHE_SIZE, the allocation size for a new slab
for the PD cache, effectively set to 64K bytes
- Use the PD cache for any allocation < NVGPU_PD_CACHE_SIZE
- When freeing up cached entries, avoid prefetch errors by
invalidating the entry (memset to 0)
Bug 3093183
Bug 3100907
Change-Id: I2302a1dfeb056b9461159121bbae1be70524a357
Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2401783
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Satish Arora <satisha@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/common/mm/vm.c')
0 files changed, 0 insertions, 0 deletions