PMPI_WTICK         42 ompi/include/mpif-externals.h       external MPI_WTIME, MPI_WTICK , PMPI_WTICK, PMPI_WTIME
PMPI_WTICK         43 ompi/include/mpif-externals.h       double precision MPI_WTIME, MPI_WTICK , PMPI_WTICK, PMPI_WTIME