art@nas:~/Fortran/Intel$ mpirun -V
Intel(R) MPI Library for Linux* OS, Version 2019 Update 8 Build 20200624 (id: 4f16ad915)
Copyright 2003-2020, Intel Corporation.
art@nas:~/Fortran/Intel$ echo $I_MPI_DEBUG
10


art@nas:~/Fortran/Intel$ mpirun -f hosts_12.txt hostname
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
art@nas:~/Fortran/Intel$ mpirun -f hosts_8.txt hostname
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
nas
art@nas:~/Fortran/Intel$ more hosts_8.txt
nas3:8
mirella3:8
art@nas:~/Fortran/Intel$ more hosts_12.txt
nas3:12
mirella3:4
art@nas:~/Fortran/Intel$