Module calibrate 

Structs

EtdConfig

Configuration for ETD calibration

PaddedAtomicBool 🔒

Cache-line padded atomic to avoid false sharing

SharedState 🔒

Shared state for two-buffer ping-pong (avoids SMT contention)

Constants

PING 🔒

PONG 🔒

Functions

calibrate_full_matrix

Perform full topology calibration. Returns matrix[i][j] = latency from CPU i to CPU j.

measure_pair 🔒

Measure round-trip latency between two CPUs using CAS ping-pong. Returns per-sample latencies (ns).