KernelBench hard · H100

KDA CUTLASS Qwen 3.8 Max

audit verdict: contamination

Real custom Triton KDA, statically and archivally correct, with no stale-value lookup or identity return. The intra kernel reads all five live inputs and overwrites all intermediates; the scan kernel overwrites the complete output from a sequential live state recurrence. Model.forward does, however, retain persistent buffers and a CUDA graph keyed only by the five input data_ptr values. Static graph semantics predict that replay rereads the current bytes at those captured addresses and rewrites the graph-owned output, but check.py never mutates a captured tensor in place. Same-buffer empirical proof is therefore required. Independently and decisively, the run is contaminated: it read and copied a complete previous KDA solution before iterating. No correctness or timing metric from this cell may be published.

20260803_220626_or-fable_qwen_qwen3.8-max_02_kda_cutlass