Many scientific computing programs, including those using MPI, are coded in Fortran. PMPI wrappers coded in C can be used with these Fortran codes, but it’s a bit complicated because Fortran is case-sensitive and sometimes function names contain underscores not present in the C-equivalent. So a program might use mpi_send or __mpi_send, neither of which…

MPI comes with a built-in interface for performing measurements and other actions during MPI calls. Here’s a quick tutorial on how it works: Create a file called wrap.c: #include <mpi.h>#include <stdio.h>double start, end;int ret;int MPI_Send(const void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm) { start = MPI_Wtime();   ret = PMPI_Send(buf,…