The bench gains a pipelined mode (topk_N event-gated on a side stream,
overlapping logits_{N+1}). Byte-equality validation was dropped after
establishing the kernel chain is run-to-run nondeterministic even
serial-vs-serial (near-equal fp32 selection).
Result on g0033 H200: pipelining recovers only 0.3-8.9% where small
chunks cost +15-46% — fp8_mqa_logits and fast_topk_transform_fused are
both SM-saturating, so concurrent streams timeshare instead of
overlapping; the small-chunk penalty is small-M GEMM inefficiency. No
production pipeline path; the serial loop at CHUNK_MAX_GB=2 stands.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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