The CPU timer described in CPU Cycle Counter is applicable for homogenous systems only. Specifically, the CPU frequency should match across the systems.
For heterogeneous systems with different CPU frequencies, a special
Normalized CPU timer(
VT_TIMER=CPU_Norm) can be used. This timer is based on the
Timer Stamp Counter(TSC) CPU ticks as well as the original CPU timer (
VT_TIMER=CPU). The normalized timer converts the local CPU ticks into microseconds on the fly to allow usage of TSC on heterogeneous systems.