In Vulkan, it is the application's responsibility to perform adequate synchronization before a sparse unmap, replace or BO destroy operation. This adds an option to AMDGPU_VA_OPs to disable redundant implicit sync that happens on sparse unmap or replace operations. This has seen a significant improvement in stutter in Forza Horizon 5 and Forza Horizon 4. (As games that had significant issues in sparse binding related stutter). Userspace changes for this new version can be found at [1][2], and a kernel branch containing these patches can be found at [3]. [1] https://gitlab.freedesktop.org/pixelcluster/drm/-/commits/vm-explicit-sync [2] https://gitlab.freedesktop.org/pixelcluster/mesa/-/commits/vm-explicit-sync [3] https://gitlab.freedesktop.org/pixelcluster/linux/-/commits/amdgpu-vm-explicit-sync v3 changes: - Rebased onto current amd-staging-drm-next - Added option to wait for drm_syncobjs instead of executing immediately Tatsuyuki Ishi (3): drm/amdgpu: Don't implicit sync PRT maps. drm/amdgpu: Add optional explicit sync fences for GEM operations. drm/amdgpu: Bump amdgpu driver version. .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 3 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 76 ++++++++++++++++--- drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 23 +++++- drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h | 6 +- drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 68 +++++++++++------ drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 30 ++++---- drivers/gpu/drm/amd/amdgpu/amdgpu_vm_cpu.c | 12 ++- drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c | 9 +++ drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 18 ++--- include/uapi/drm/amdgpu_drm.h | 7 ++ 14 files changed, 194 insertions(+), 66 deletions(-) -- 2.46.0
