MPI_T_PVAR_GET_NUM(3)

💅 MPI_T_PVAR_GET_NUM(3) — an Open MPI moment

okay bestie, welcome to MPI_T_PVAR_GET_NUM(3) from your faves at Open MPI ✨ this is the little guy that tells you how many performance variables you're working with. tiny page, elite info, let's go 🎀

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✨ NAME ✨

MPI_T_pvar_get_num — query the number of performance variables 💖

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🌸 SYNTAX 🌸

💜 C Syntax

#include <mpi.h>

int MPI_T_pvar_get_num(int *num_pvar)

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🦋 OUTPUT PARAMETERS 🦋

• num_pvar — bestie this is where the answer lands: the current number of performance variables 🔥

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🌈 DESCRIPTION 🌈

so here's the vibe 💫 MPI_T_pvar_get_num lets you query the current number of performance variables. like, how many are there right now, that's the whole ask 🙈

and the tea is ☕ that number can increase throughout the execution of the process — more pvars can show up as you go — but it will never decrease. no cap. it only goes up 📈 periodt.

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💀 ERRORS 💀

MPI_T_pvar_get_num will fail if:

• MPI_T_ERR_NOT_INITIALIZED — the MPI Tools interface not initialized 😭 like bestie you gotta init it first, that's the whole thing 🫶

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👑 COPYRIGHT 👑

2003-2026, The Open MPI Community 💖

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and that's the page!! 🧚 ty for reading my lil manpage era, mwah 💅✨ Sep 11, 2026 — MPI_T_PVAR_GET_NUM(3), source & version courtesy of The Open MPI Community 🎀 slay 🦋