From alexpolo1's bare-metal 2x 3090 + NVMe re-run (#423, 2026-06-24, after #454):
1. Warm-L2 rehydrate is COMPUTE-bound, not disk-bound (5.30 s = 405 ms disk +
37 ms H2D + ~4.8 s Mamba/GDN-state recompute) — a faster SSD won't speed
warm-load on this hybrid; the L2 tier buys persistence/capacity, not warm
speed. Closes the lmcache.yml "L2 latency not yet measured on-rig" caveat.
2. An aborted prefill banks only the completed prefix (46/320) — LMCache
commits a session's blocks only on request completion, so the first long
prefill must run to completion or it re-prefills from scratch.
INTERNALS.md LMCache section + lmcache.yml header. Comment/prose only.
noonghunna
7b0c4d4abc