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dsa(indexer_backward): opt-in SM100 sparse backward v2 — 1.16-1.92x faster (fp32-accurate d_index_k at no extra cost) - #640

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Anerudhan merged 6 commits into
NVIDIA:developfrom
zkyue:feat/dsa-idxbwd-sm100-v2
Aug 26, 2026
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dsa(indexer_backward): opt-in SM100 sparse backward v2 — 1.16-1.92x faster (fp32-accurate d_index_k at no extra cost)#640
Anerudhan merged 6 commits into
NVIDIA:developfrom
zkyue:feat/dsa-idxbwd-sm100-v2

test(dsa): form the indexer-backward reference grad signal analytical…

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succeeded Aug 26, 2026 in 4s