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d3d12: Video sliced encode: Use same ID3D12Fence/different per slice values as optimization

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Reviewed-by: Pohsiang (John) Hsu <pohhsu@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40756>
This commit is contained in:
Silvio Vilerino 2026-03-31 15:35:31 -04:00 • committed by Marge Bot
parent 9f4d3267c9
commit b83a931cb1
2 changed files with 11 additions and 4 deletions
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14
src/gallium/drivers/d3d12/d3d12_video_enc.cpp
View file

@ -4102,7 +4102,11 @@ d3d12_video_encoder_encode_bitstream_impl(struct pipe_video_codec *codec,
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionOffsets.resize(num_slice_objects, {});
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences.resize(num_slice_objects, NULL);
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pSubregionPipeFences.resize(num_slice_objects);
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].ppSubregionFenceValues.resize(num_slice_objects, pD3D12Enc->m_fenceValue);
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].ppSubregionFenceValues.resize(num_slice_objects);
// m_SliceFenceValue is incremented per slice object and shared across all slices of the frame so the app can
// wait on a single fence but individual per frame, slice values
for (uint32_t i = 0; i < num_slice_objects; i++)
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].ppSubregionFenceValues[i] = pD3D12Enc->m_SliceFenceValue++;
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].ppSubregionSizes.resize(num_slice_objects, NULL);
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].ppSubregionOffsets.resize(num_slice_objects, NULL);
@ -4144,9 +4148,11 @@ d3d12_video_encoder_encode_bitstream_impl(struct pipe_video_codec *codec,
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].ppSubregionSizes[i] = pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionSizes[i].Get();
if (pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences[i] == nullptr)
hr = pD3D12Enc->m_pD3D12Screen->dev->CreateFence(0, D3D12_FENCE_FLAG_NONE, IID_PPV_ARGS(&pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences[i]));
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].ppSubregionFences[i] = pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences[i].Get();
// Share a single ID3D12Fence object across all slices of this frame (per metadata slot)
if (pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences[0] == nullptr)
hr = pD3D12Enc->m_pD3D12Screen->dev->CreateFence(0, D3D12_FENCE_FLAG_NONE, IID_PPV_ARGS(&pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences[0]));
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences[i] = pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences[0];
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].ppSubregionFences[i] = pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences[0].Get();
pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pSubregionPipeFences[i].reset(
d3d12_create_fence_raw(pD3D12Enc->m_spEncodedFrameMetadata[current_metadata_slot].pspSubregionFences[i].Get(),

1
src/gallium/drivers/d3d12/d3d12_video_enc.h
View file

@ -588,6 +588,7 @@ struct d3d12_video_encoder
ComPtr<ID3D12Fence> m_spLastSliceFence;
uint64_t m_fenceValue = 1u;
uint64_t m_LastSliceFenceValue = 1u;
uint64_t m_SliceFenceValue = 1u;
uint64_t m_ResidencyFenceValue = 0u;
bool m_bPendingWorkNotFlushed = false;