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.

For more complete information about compiler optimizations, see our Optimization Notice.
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