User Guide


MPI Imbalance

Metric Description

MPI Imbalance shows the CPU time spent by ranks spinning in waits on communication operations, normalized by the number of ranks. High metric value can be caused by application workload imbalance between ranks, nonoptimal communication schema or settings of MPI library. Explore details on communication inefficiencies with Intel Trace Analyzer and Collector.

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