From 1ac354beecfd58e769fb5373d6b2ac87bce9e1e4 Mon Sep 17 00:00:00 2001 From: Daniel Phillips Date: Thu, 28 Jul 2022 20:05:08 -0700 Subject: [PATCH] drm/amdgpu: Pessimistic availability based on rounded up allocations Separately accumulate a statistic of rounded up allocations to use to report availability, with a view to increasing the likelihood a buffer object can be successfully allocated at exactly the size reported by the availability API. Signed-off-by: Daniel Phillips Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 10 +++++++--- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h index 3c09dcc..647220a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h @@ -96,6 +96,7 @@ struct amdgpu_amdkfd_fence { struct amdgpu_kfd_dev { struct kfd_dev *dev; uint64_t vram_used; + uint64_t vram_used_aligned; bool init_complete; struct work_struct reset_work; }; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 2d2ef63..cbd593f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -182,8 +182,10 @@ int amdgpu_amdkfd_reserve_mem_limit(struct amdgpu_device *adev, */ WARN_ONCE(vram_needed && !adev, "adev reference can't be null when vram is used"); - if (adev) + if (adev) { adev->kfd.vram_used += vram_needed; + adev->kfd.vram_used_aligned += ALIGN(vram_needed, VRAM_AVAILABLITY_ALIGN); + } kfd_mem_limit.system_mem_used += system_mem_needed; kfd_mem_limit.ttm_mem_used += ttm_mem_needed; @@ -203,8 +205,10 @@ void amdgpu_amdkfd_unreserve_mem_limit(struct amdgpu_device *adev, } else if (alloc_flag & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) { WARN_ONCE(!adev, "adev reference can't be null when alloc mem flags vram is set"); - if (adev) + if (adev) { adev->kfd.vram_used -= size; + adev->kfd.vram_used_aligned -= ALIGN(size, VRAM_AVAILABLITY_ALIGN); + } } else if (alloc_flag & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) { kfd_mem_limit.system_mem_used -= size; } else if (!(alloc_flag & @@ -1610,7 +1614,7 @@ size_t amdgpu_amdkfd_get_available_memory(struct amdgpu_device *adev) size_t available; spin_lock(&kfd_mem_limit.mem_limit_lock); available = adev->gmc.real_vram_size - - adev->kfd.vram_used + - adev->kfd.vram_used_aligned - atomic64_read(&adev->vram_pin_size) - reserved_for_pt; spin_unlock(&kfd_mem_limit.mem_limit_lock); -- 2.7.4