_NUM_PES(3)

💖 NAME 💖

_num_pes, _num_pes, shmem_n_pes — bestie, this is the lil function that tells you how many processing elements (PEs) are out there running your app. Like, the whole squad headcount. 🫶

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✨ SYNOPSIS ✨

okay so here's how you call it, depending on your language era:

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 ()

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🌸 DESCRIPTION 🌸

num_pes() or shmem_n_pes() return the total number of PEs running in an application. that's it. that's the whole vibe. it's giving census day for your parallel program 👑

See also:

• intro_shmem(3)
• shmem_my_pe(3)
• shmem_init(3)

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🎀 Copyright

2003-2026, The Open MPI Community

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okay bestie that's the whole page fr fr 💅 this lil gem shipped with Open MPI and the page is dated Sep 10, 2026 — go forth and count your PEs, you got this 🌟