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[Bugfix] [B200] cutlass_mla - ensure kv_split == 1 for batch size > 1 (#25509)

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Signed-off-by: Alexander Matveev <amatveev@redhat.com>
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Alexander Matveev 2025-09-23 19:57:55 -04:00 committed by GitHub
parent e0b24ea030
commit 1210e4d95b
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1 changed files with 2 additions and 2 deletions
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csrc/attention/mla/cutlass_sm100_mla/device/sm100_mla.hpp
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@ -135,10 +135,10 @@ public:
max_splits = min(16, max_splits); max_splits = min(16, max_splits);
// TODO: This avoids a hang when the batch size larger than 1 and // TODO: This avoids a hang when the batch size larger than 1 and
// there is more than 4 kv_splits. // there is more than 1 kv_splits.
// Discuss with NVIDIA how this can be fixed. // Discuss with NVIDIA how this can be fixed.
if (B > 1) { if (B > 1) {
max_splits = min(2, max_splits); max_splits = min(1, max_splits);
} }
// printf(" max_splits = %d\n", max_splits); // printf(" max_splits = %d\n", max_splits);