M1T1 — Measure sustained memory bandwidth¶
Run on one GPU:
Use the published peak for your exact SKU, not a family-level headline. The run writes results/latest.json and results/bandwidth.png. A healthy large-buffer result should be stable across runs; the learning target is to explain the measured percentage of peak, not to hit a universal number.
For a plumbing check without a GPU, pass --device cpu --size-mib 256. That result measures host memory and is not evidence about HBM.