# MPI Parallel Efficiency

The MPI Parallel Efficiency (MPI PE) describes the parallel execution of the code in MPI considering that from the MPI point of view, the OpenMP runtime is as useful as the computations.

Similarly, to the original POP metrics model, can be computed by multiplying the MPI Load Balance Efficiency (MPI LBE) and MPI Communication Efficiency (MPI CE) metrics as follows:

$MPI\_PE = MPI\_CE \times MPI\_LBE$

In order to fully understand the formulas, you may also visit the glossary of the metrics terms.