Clamp Vulkan DMMV workgroup sizes on AMD GCN#13

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rasbid wants to merge 1 commit intomasterfrom

codex/add-amd_gcn-guard-for-wg_size_subgroup

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rasbid commented Oct 13, 2025

Summary

clamp the DMMV Vulkan workgroup sizes on AMD GCN GPUs to no more than twice the native subgroup size (128 threads)
ensure reduction mode selection continues to align with the clamped workgroup sizes

Testing

not run (not available in container)

https://chatgpt.com/codex/tasks/task_e_68ebeecbddc483309b8b3d214e92590f


          Clamp Vulkan DMMV workgroup sizes on AMD GCN

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