User Guide


Effective Physical Core Utilization

Metric Description

This metric represents how efficiently the application utilized the physical CPU cores available and helps evaluate the parallel efficiency of the application. It shows the percent of average utilization by all physical CPU cores on the system. Effective Physical Core Utilization contains only effective time and does not contain spin and overhead. An utilization of 100% means that all of the physical CPU cores were loaded by computations of the application.

Possible Issues

The metric value is low, which may signal a poor physical CPU cores utilization caused by:
  • load imbalance
  • threading runtime overhead
  • contended synchronization
  • thread/process underutilization
  • incorrect affinity that utilizes logical cores instead of physical cores
Explore sub-metrics to estimate the efficiency of MPI and OpenMP parallelism or run the Locks and Waits analysis to identify parallel bottlenecks for other parallel runtimes.

Product and Performance Information


Performance varies by use, configuration and other factors. Learn more at