kv transfer

An 8k-token prompt on a 70B model leaves 2.7 GB of KV that has to cross the network before decode can start. The answer shows that the sustained bandwidth is modest, that the latency is the real problem, and which side of the link runs out first.

Reconstruct token arrival from a request-correlated trace. Separate transfer overlap from decode admission, and show how first-token delivery changes the metric that exposes a handoff stall.