MPI_T_PVAR_SESSION_FREE(3)

💖 MPI_T_PVAR_SESSION_FREE 💖

okay bestie, so this is from the Open MPI manual, section 3, and it's all about MPI_T_pvar_session_create and MPI_T_pvar_session_free — the dynamic duo that makes and breaks your performance variable sessions. 🎀

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✨ NAME ✨

MPI_T_pvar_session_create, MPI_T_pvar_session_free — create/free performance variable session 🦋

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🌸 SYNTAX 🌸

C Syntax

#include <mpi.h>

int MPI_T_pvar_session_create(MPI_T_pvar_session *session)

int MPI_T_pvar_session_free(MPI_T_pvar_session *session)

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💅 DESCRIPTION 💅

so like, MPI_T_pvar_session_create <#mpi-t-pvar-session-create> makes u a whole session for accessing performance variables. the new session gets handed back to u in the session parameter. it's giving newborn baby session, main character energy ✨

then MPI_T_pvar_session_free releases a session that was allocated by MPI_T_pvar_session_create <#mpi-t-pvar-session-create>, and — this is the iconic part — it sets the session parameter to MPI_T_PVAR_SESSION_NULL. so the pointer goes from valid to literally nothing, no cap. clean up after urself, periodt 💅

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😭 ERRORS 😭

MPI_T_pvar_session_create <#mpi-t-pvar-session-create> will fail if:

• MPI_T_ERR_NOT_INITIALIZED: the MPI Tools interface is not initialized 🙈
• MPI_T_ERR_MEMORY: out of memory 💀
• MPI_T_ERR_OUT_OF_SESSIONS: no more sessions available 😭

MPI_T_pvar_session_free will fail if:

• MPI_T_ERR_NOT_INITIALIZED: the MPI Tools interface is not initialized 🙈
• MPI_T_ERR_INVALID_SESSION: the session parameter is not a valid session 💀

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🫶 COPYRIGHT 🫶

Copyright 2003-2026, The Open MPI Community 👑

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and that's the whole vibe bestie — this page was living in the Open MPI manual on Sep 10, 2026, filed under MPI_T_PVAR_SESSION_FREE(3). go forth and manage ur sessions responsibly 💖✨🌈