qwen4exp: grouped-union sparse prefill flash attention — fixes the pp depth cliff - #11

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LynxPDA wants to merge 17 commits into

Nathanw1014:strix-halo-vulkanfrom

LynxPDA:pr/sparse-fa-pp-fix

Commits on Sep 11, 2026

vulkan: sparse flash attention for qwen4exp top-k masks
LynxPDA
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20edd90
vulkan: size the sparse-FA compaction per-subgroup tally to the workgroup
LynxPDA
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7e56d92
docs: recipe - shared per-subgroup tally sizing bug in the sparse FA compaction
LynxPDA
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c46ecbc
docs: recipe - the sparse-FA shared-tile tiling contract
LynxPDA
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949cc2c
vulkan: fix grouped union prefill host addressing for non-square head/batch shapes
LynxPDA
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ec22659
docs: recipe - push constants carry the destination shape, not the dispatch tile's
LynxPDA
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161ab59
feat: enable the grouped union prefill for GQA caches by default
LynxPDA
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0b08831

Commits on Sep 12, 2026

vulkan: overlap the union scan of group g+1 with flash attention of group g
LynxPDA
committed
0209047

Commits on Sep 13, 2026

Commits on Sep 14, 2026

vulkan: widen the top-k radix pass and batch the emit scan
LynxPDA
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188988f
vulkan: fold the QSA score transpose into the top-k gather
LynxPDA
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380b00a
vulkan: clear the fusion label when a fusion is declined
LynxPDA
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929aa8d

Commits on Sep 15, 2026