8.7.2.0.1 Initialization and Completion

The call to MPI_FINALIZE should occur on the same thread that initialized MPI-/. We call this thread the main thread. The call should occur only after all the process threads have completed their MPI-/ calls, and have no pending communications or I/O operations.

Rationale. This constraint simplifies implementation.(End of rationale.)

MPI-Standard for MARMOT