b70-optimization-lab

Laguna shared-down native M=8 BF16 MM component pass

Date: 2026-07-23 America/Toronto

The down-only native-M8 shared-expert treatment passed the frozen four-card component gate. This is a component result, not an endpoint benchmark or a LocalMaxxing record.

Result

The passing root is:

/mnt/fast-ai/llm-optimization-artifacts/laguna-s-2.1/runs/shared-down-m8-component-20260723T155703Z

The aggregate artifact is aggregate.json, SHA-256 ea71971b368ce9b9e930577b673e983124b0e5686d5d780fc241ac4104f2a1d6. The frozen analyzer classified it component-passed-counter-tooling-freeze-next.

Rank BDF Wins Control ms/cycle Candidate ms/cycle Saving ms/cycle Relative
0 0000:23:00.0 31/31 2.309867 1.698725 0.610891 26.4470%
1 0000:27:00.0 31/31 2.391377 1.745049 0.647105 27.0599%
2 0000:43:00.0 31/31 2.313656 1.715529 0.597514 25.8255%
3 0000:47:00.0 31/31 2.361052 1.771314 0.612379 25.9367%

Every card independently exceeded the frozen requirements of at least 28/31 block wins and at least 0.15 ms median saving per complete 47-layer cycle. The narrowest observed margin was rank 2 at 0.597514 ms, nearly four times the absolute threshold.

Exactness and identity

Each card passed 128 changing exactness epochs, the actual checkpoint-selected RowParallelLinear path, and a 32-epoch post-timing replay. The candidate, candidate repeat, shared+routed add, and fixed-rank simulated sum were raw bitwise equal to control at every declared boundary. The marked M=8 path issued exactly one native MM; unmarked M=8 and marked M=7 issued exactly two incumbent BMMs; the bad-layout candidate failed closed.

All four cards reported the same aggregate fixture hash 3e28840809747843474a15f7858db9b7d1d4d70b4fbe71c47c7a2aa117eeff90 and output hash ae8c34ea1bb5904466a702412a1ccc1f6843d3bed05e948f079e82647b4f33a7. The analyzer verified four distinct UUIDs/BDFs, one boot, one clean main commit, and the frozen vLLM, kernel, binary, configuration, environment, and tool identities.

The captured source identities were:

The structured summary is data/laguna-s-2.1-shared-down-m8-component-pass-20260723.json. The full protocol and the two sealed preflight-tool failures remain in the preregistration.

Authorization boundary

This pass authorizes only construction, source freezing, validation, and independent audit of dedicated cold hardware-counter tooling. It does not authorize counter execution, an endpoint service, model generation, a payload, or a LocalMaxxing submission. Those flags remain false in every card artifact and the aggregate.

The next step is to implement the preregistered two-pair per-card cold unitrace gate, freeze its source and hashes, and audit it before running any counter capture. All live evidence remains on local NVMe; the external USB remains backup-only.