DOKK / manpages / debian 10 / openmpi-doc / shmem_n_pes.openmpi.3.en
SHMEM_N_PES(3) Open MPI SHMEM_N_PES(3)

num_pes, _num_pes, shmem_n_pes - Returns the number of processing elements (PEs) used to run the application.

C or C++:

#include <mpp/shmem.h>
int _num_pes (void);
int shmem_n_pes (void);

Fortran:

include 'mpp/shmem.fh'
I = NUM_PES ()
I = SHMEM_N_PES ()

num_pes() or shmem_n_pes() return the total number of PEs running in an application.

intro_shmem(3), shmem_my_pe(3), shmem_init(3)

October 29, 2018 3.1.3