docs: qwen38-fp8 expert-offload tuning — prefetch off hits 37.4-40.6 tok/s (target met)
Measured campaign on the ad hoc qwen-fp8 container (tcclaviger RDNA4
fork, 2x R9700, TP=2): telemetry (with_stack=false) measured the
prefetcher at 36% precision — ~half of gather traffic wasted; deleting
--expert-prefetch: 26.8 -> 40.57/37.44/37.57 tok/s. Prefetch-on shape
survived every other challenger (gather geometry, spec depth, TunableOp
[corrupts numerics], MNBT, concurrency, ngram [PLE fork bug]). 256k ctx
boots at 4.5 GiB KV (36.65/34.21/34.77, arena -14%). New runbook +
index links + log entry.
Frank
0ccb01708b