Date: 2026-07-23 America/Toronto
The recovered, frozen routed-W1 endpoint campaign stopped after A1/B1 exactly as preregistered. Both legs were honest and bitwise exact, and N128 removed real target-cycle work, but it lost the official endpoint comparison:
| Metric | A1 N64 control | B1 N128 candidate | B1 - A1 |
|---|---|---|---|
| Headline median tok/s | 34.969418822 | 34.029104704 | -0.940314118 (-2.6890%) |
| Mean tok/s | 38.223511425 | 39.176425110 | +0.952913685 |
| p10 tok/s | 24.221875960 | 26.815770749 | +2.593894789 |
| Target-cycle time | 94.093806528 ms | 90.341118198 ms | -3.752688330 ms (-3.9882%) |
| Acceptance | 4,641/12,047 | 4,642/12,040 | +0.030703 percentage point |
B1 won only 3/13 paired prompt rows. The paired median was
-0.940314118 tok/s (-3.057791%). It therefore failed the three frozen
performance gates requiring a faster headline, at least 9/13 row wins, and a
positive paired median. It passed the cycle-saving and bounded work-drift
gates.
The classification is phase1_failed_stop. B2 and A2 were not run, no rescue
or fifth run is permitted, and no LocalMaxxing payload was staged or
submitted. The approved record remains 33.89498511171744 tok/s,
cmrx6p5dv001bo4017hb7sixz.
Both fresh services passed every frozen source, model, runtime, freshness, accounting, exactness, and cleanup check:
The only treatment difference was literal
VLLM_XPU_LAGUNA_M8_W1_N_TILE=64 versus 128. The complete approved
shared-elementwise + QKNorm/RoPE + route-interleaved DFlash stack remained
fixed.
N128 is a real isolated kernel optimization, not an endpoint win. The prior four-card component gate measured an 8.7271% mean isolated W1 improvement, and this endpoint phase still saved 3.7527 ms per normalized target cycle. Nevertheless, ten prompt rows slowed and both robust endpoint summaries moved against the candidate. The larger tile is therefore closed as a promotion candidate for this exact stack.
The mean and p10 are reported as secondary observations only. A large cold A1 first-row slowdown raised B1’s mean comparison, but the frozen primary median, row-win count, and paired median all reject N128. No post-hoc metric replaces those gates.
b299a842ed393d95367a4b0a77e410f71206bd2c;8936aac144929190c1e53f8b8624ca397ce16f5b;c59aaadbbfd350c2b5f4ad663e247c2811ae3181;4bbfc285f2f8b3b6b526274c133b7b17aae6c8cb;5e07c246915c86dc6920fead03d019989224f2ba; and45aa105ef4eceaf05cad33012e0752369f77cbbd76f2213ccfe0ce130fa6c0ac.All live model reads and evidence writes used internal NVMe/ext4:
/mnt/fast-ai/llm-models/laguna-s-2.1
/mnt/fast-ai/llm-optimization-artifacts/laguna-s-2.1
The external Corsair USB remained backup-only.
Canonical artifact root:
/mnt/fast-ai/llm-optimization-artifacts/laguna-s-2.1/runs/w1-n128-nvme-recovery-abba-8936aac-c59aaad-20260723T131632Z
Key hashes:
fd5c2e33b90ab29875e8fc6d67b4d3bd60e2514e216179ae5dfe2ee41c26dcd1;5a5ae9657095dfe95243850a42a96582e0e862eb3c6fc2760577635d6f565981;290ed77d762a5e5c52575402d4b583ffebbb2527572b04f0fa8a989b275ec9d6;phase1-analysis.json and byte-identical stdout:
1e21b57c90dd066c58a637739a723b2de951ae5ba99b43352640289eb34ff0de;phase1-analysis.md:
5a8e122af2d96fe08afe3a44968adb86d1a0efb243e42433fb94b3dabfe36835;
andphase1-analysis.seal.json:
49f352104d37ad1bf134d9e6330390be39408fa96cdc2ae6c5861eeb98c8bc4e.Both leg manifests verify. The seal reports valid=true, the campaign ledger
and hash chain remain unchanged, and all publication-evidence checks pass.
Postflight found no listener on port 8000, no model worker, kernel taint zero,
and both leg cleanup records at status zero.
Compact tracked packet:
data/laguna-s-2.1-w1-n128-nvme-phase1-failed-stop-20260723.json
Preserve N128 as negative evidence and keep N64 as the routed-W1 endpoint policy. The next clean lane should target shared-expert GEMM occupancy or a separately preregistered narrower routed-W1 geometry. Do not reinterpret the cycle saving as permission to rerun this campaign or stack the failed router candidate.