MPI_T_PVAR_READ(3)

📦
version 5.0.11 · 16 versions
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💅 MPI_T_PVAR_READ — like, the Open MPI manual page, bestie 🎀

okay so before we even get into it: this is MPI_T_pvar_read from the Open MPI gang, and it's genuinely one of the cutest little calls once you get what it's doing. buckle up. ✨

✨ NAME ✨

MPI_T_pvar_read — read the value of a performance variable 🔥

🌸 SYNTAX 🌸

C Syntax

#include <mpi.h>

int MPI_T_pvar_read(MPI_T_pvar_session session, MPI_T_pvar_handle handle, const void *buf)

like yes, that's the whole signature. chef's kiss. 🫶

💖 INPUT PARAMETERS 💖

  • session — the performance experiment session. it's giving "the vibe we're operating in rn" 🌈
  • handle — the performance variable handle. your little pointer-passport to the variable itself 👑
  • buf — the initial address of the storage location for the variable value. this is where the answer goes, bestie 📥

🦋 DESCRIPTION 🦋

so MPI_T_pvar_read queries the value of a performance variable — the one identified by the handle you dropped in handle, inside the session you dropped in session. 🎀

the result gets stored in the buffer pointed to by buf. iconic. obsessed. 💅

⚠️ ok but listen — the caller must make sure the buffer pointed to by buf is large enough to hold the entire value of the performance variable. that one's on you, not on the function. no cap. 😭

💀 ERRORS 💀

MPI_T_pvar_read will fail if:

  • MPI_T_ERR_NOT_INITIALIZED — the MPI Tools interface not initialized 🙈
  • MPI_T_ERR_INVALID_HANDLE — the handle is invalid or not associated with the session 💀
  • MPI_T_ERR_INVALID_SESSION — the session argument is not a valid session 🫠

🔥 SEE ALSO 🔥

  • MPI_T_pvar_handle_alloc
  • MPI_T_pvar_get_info
  • MPI_T_pvar_session_create

go read those next, iykyk ✨

2003-2026, The Open MPI Community

and that's the whole page, bestie! 🍓 this one came straight from the Open MPI crew — copyright 2003-2026, The Open MPI Community, dated Sep 11, 2026 — so yeah, drop a little respect on it. mwah. 💜🧚

📦 where this page comes from