This read-write TruthValue toggles whether the device tracks packets-per-second handled by its CPU. Admins care because turning this on lets them monitor for CPU-bound traffic surges, such as those from a control-plane-targeted attack, at the cost of a small amount of extra processing overhead. For example, an admin enables this ahead of a suspected denial-of-service event so rlSctCpuRate begins reporting live CPU packet-handling rates for diagnosis.