User and Reference Guide

Contents

Normalized CPU Cycle Counter

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.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.