github Dao-AILab/flash-attention fa4-v4.0.0.beta31

pre-release19 hours ago

What's Changed

  • Add an Attention Sink to Flash MLA for SM100 by @floatingtrees in #2768
  • [CuTe, SM100] Stop the non-causal hdim 128 softmax warps spilling by @dawnop in #2869
  • [CuTe, SM100] hd256 2-CTA: support seqused_q/seqused_k and the decoder paged-KV shape by @kzos in #2810
  • [CuTe, SM100] Preserve hd256 output alignment for vectorized stores by @drisspg in #2880
  • One more deprecation; by @drisspg in #2867
  • [CuTe, SM100, HD256] optimize SM100 HD256 varlen scheduling and epilogues by @catwinee in #2807
  • [CuTe, SM90] Fix swapped backward MMA layout and use 2-stage hdim256 config by @SuperGoodGame in #2888
  • [CuTe, Bwd] Return zero gradients for empty Q/K workloads by @guoriyue in #2776
  • [CuTe, Fwd] Fix PackGQA predication for padded head dimensions by @guoriyue in #2775

New Contributors

Full Changelog: fa4-v4.0.0.beta30...fa4-v4.0.0.beta31

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