Cube GUI User Guide  (CubeGUI 4.8.2, revision 7895e762)
Introduction in Cube GUI and its usage

MPI Communication Efficiency

MPI Communication Efficiency can be evaluated directly by following formula:

\begin{eqnarray*}MPI\; Communication\; Efficiency=\frac{max(time\; outside\; of\; MPI)}{max(runtime)} \end{eqnarray*}

This metric identifies when code is inefficient because it spends a large amount of time communicating rather than performing useful computations.


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