[Question] Shader Execution Reodering (SER)

[albertrodriguezclo]

Hi,

For the raytracing pipeline I see you offer some kind of shader execution reordering for example in Vulkan:

NVRHI/src/vulkan/vulkan-device.cpp

Line 357 in ee499a8

return vk::RayTracingInvocationReorderModeNV::eReorder == m_Context.nvRayTracingInvocationReorderProperties.rayTracingInvocationReorderReorderingHint;

The thing is SER became a multivendor feature in Vulkan and DX12 some months ago:
-VK_EXT_ray_tracing_invocation_reorder
Mentioned here: https://www.khronos.org/blog/boosting-ray-tracing-performance-with-shader-execution-reordering-introducing-vk-ext-ray-tracing-invocation-reorder
-DIRECTX
Mentioned here: https://devblogs.microsoft.com/directx/ser/

Is the code at this point completely adapted to it or we'd need to adjust to this new state? (potentially pointing to the new extensions?)

Thank you!

[apanteleev]

NVRHI has not been updated to support the official SER extensions in Vulkan or DX12 yet. Considering that these are mostly shader-side features, adding support here would be pretty easy - it's just a feature availability check.