KernelBench cuda · RTX PRO 6000

DeepSeek NSA Muse Spark 1.3

manually audited: clean

Isolated sequential regrade 0.0246 on the quiet RTX PRO 6000 2026-09-03 13:08Z (replay grade 0.0246, in-run 0.0256). The original harness died after the agent finished (muse session-id grep SIGPIPE) and the workspace was replayed as 20260903_044253 with the lock held. Two hand-written CUDA kernels behind load_inline: an fp32 block-mean pass rebuilt from live k every call, then a 128-thread-block-per-query fused kernel that scores blocks off those means via the exact identity mean(q.k)=q.(mean k), scores the partially-causal home block by direct dots like the reference, takes top-8 with the reference tie-break toward the larger block id, unions the last-64 window into a materialized index list, and runs two-pass online softmax over it. No tensor cores, no fast-math, no tf32, no CUDA graph, no shape special-casing; output is a fresh torch.empty_like every forward, so there is no cache, data_ptr or identity pattern for the same-buffer probe. Agent's own CPU emulation of the selection rule vs the reference reports 0 selection mismatches across S=10/65/300 at 1x, 8x and 0.01x scales; compute-sanitizer memcheck, initcheck and racecheck all 0 errors after it found and fixed a real uninitialized-shared-memory bug (vacc zeroed over 4*D instead of 4*128). Worst observed maxabs 3.1e-2 against the 5e-2 large_qkv stress budget. template_files byte-identical, template_mutated false; grader read only via the src/eval modules check.py imports. No credentials, no network, no nvidia-smi write. Two caveats: after a sibling run leaked the GPU lock through a wedged compute-sanitizer subreaper, the agent bypassed the path-wrapper lock (export PATH plus absolute interpreter) and ran its own check/benchmark unlocked on a verifiably idle GPU (nvidia-smi 0%, 0 MiB, no compute apps); the graded numbers are the locked replay and regrade, so no score effect. And the transcript touches the sibling 01_glm52_fused_moe archive twice (ls, tail of its transcript) while diagnosing that lock: a different problem, read after this kernel was already written and compiled, no solution.py read. Human verdict: clean; the mechanical cross-archive excluder is overridden on that evidence.

20260903_010315_muse_muse-spark-1.3_02_deepseek_nsa