drm/amdgpu: Optimize KFD page table reservation

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Be less pessimistic about estimated page table use for KFD. Most
allocations use 2MB pages and therefore need less VRAM for page
tables. This allows more VRAM to be used for applications especially
on large systems with many GPUs and hundreds of GB of system memory.

Example: 8 GPUs with 32GB VRAM each + 256GB system memory = 512GB
Old page table reservation per GPU:  1GB
New page table reservation per GPU: 32MB

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: xinhui pan <xinhui.pan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Felix Kuehling 2019-07-15 16:18:03 -04:00 • committed by Alex Deucher

parent b72ff1909c

commit 9f890f3044

1 changed files with 14 additions and 1 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c

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