User Guide


OpenMP* Potential Gain

Metric Description

Potential Gain shows the maximum time that could be saved if the OpenMP region is optimized to have no load imbalance assuming no runtime overhead (Parallel Region Time minus Region Ideal Time). If the Potential Gain is large, make sure the workload for this region is enough and the loop schedule is optimal.
uses the following methodology to calculate the Potential Gain metric that is a sum of inefficiencies normalized by the number of threads:
Potential Gain

Possible Issues

The time wasted on load imbalance or parallel work arrangement is significant and negatively impacts the application performance and scalability. Explore OpenMP regions with the highest metric values. Make sure the workload of the regions is enough and the loop schedule is optimal.

Product and Performance Information


Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804