[Bugfix][MiniMax-M3] Avoid NaNs for empty sparse decode rows - #49054
[Bugfix][MiniMax-M3] Avoid NaNs for empty sparse decode rows#49054thepowerfuldeez wants to merge 2 commits into
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Assisted-by: OpenAI Codex Signed-off-by: thepowerfuldeez <george@poolside.ai>
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hi guys! any review? |
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Summary
I avoid
-inf - -infin the MiniMax M3 split-K merge when CUDA-graph padding leaves a row without valid chunks. Active rows keep the existing normalization, and empty rows return zeros.Duplicate check
I searched open issues and PRs for MiniMax M3 sparse attention, padded or empty rows, and split-K NaNs. I found no PR covering this fix.
Tests
CUDA_VISIBLE_DEVICES=6 .venv/bin/python -m pytest tests/kernels/attention/test_minimax_m3.py::test_decode_sparse_attention_correctness -v(16 passed).venv/bin/pre-commit run --files tests/kernels/attention/test_minimax_m3.py vllm/models/minimax_m3/common/ops/sparse_attn.py(passed)AI assistance was used to prepare this change. I reviewed the two-file diff and the test results.