Im not sure I’ve ever seen InterlockedAdd (hlsl) work correctly on Nvidia. Works on AMD tho. Can’t help but wonder if I’m doing something wrong, and AMD is more permissive. Seen a few reports of other people noticing the same thing.
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Okay, but no other accesses to that buffer in the first shader? Then on D3D11, you need to do nothing else. On D3D12, you need a UAV barrier on that buffer between the two dispatches.
Interesting. I've seen the problem (it manifests as flickering in the final result) on d3d11. We run Vulkan, D3D12, and D3D11 with an abstraction layer in between, so I'll be digging for a missing barrier. FWIW, problem goes away on Nvidia if I set numthreads(1,1,1).
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Sorry -- to answer the question: No other access in the first shader. I'm fairly straightforward about what buffers are "reads" and what are "writes", with only 1 place of writing for any given buffer.
Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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