MPI_T_PVAR_RESET(3)

💅 MPI_T_PVAR_RESET — bestie's guide to yeeting a perf variable back to zero

okay so this is from the Open MPI manual, section 3 (the library-calls girly section, iykyk) — and it's literally the glow-up-reset page. Let's get into it ✨

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🌸 SYNOPSIS 🌸

C Syntax

#include <mpi.h>

int MPI_T_pvar_reset(MPI_T_pvar_session session, MPI_T_pvar_handle handle)

that's it. that's the whole vibe. one function call and your performance variable is back to its factory settings 💅

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🎀 INPUT PARAMETERS 🎀

• session — the performance experiment session. like, the party your variable is attending 🎉
• handle — the performance variable handle, or the special glow-up value MPI_T_PVAR_ALL_HANDLES if you wanna do everybody at once 👑

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✨ DESCRIPTION ✨

so MPI_T_pvar_reset sets the performance variable that's specified by the handle in handle back to its initial value. that's the whole job. no cap, no extra steps 🫶

and here's the iconic part: you can pass the special value MPI_T_PVAR_ALL_HANDLES in handle and it will reset all read-write handles in the session you gave it in session. like a group-chat clear-out but for variables. main character energy fr fr 💀

lowkey important: it's the read-write handles that get reset when you use MPI_T_PVAR_ALL_HANDLES — read-only girlies aren't invited to this party 🙈

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💀 ERRORS 💀

MPI_T_pvar_reset will fail if any of these happen — vibe check failed, bestie 😭

• MPI_T_ERR_NOT_INITIALIZED — the MPI Tools interface isn't initialized yet. you gotta boot it up first, babes ✨
• MPI_T_ERR_INVALID_HANDLE — the handle is invalid. that's not a real handle, that's a random number 🚩
• MPI_T_ERR_INVALID_SESSION — the session argument is not a valid session. wrong party, wrong address 🎀
• MPI_T_ERR_PVAR_NO_WRITE — the variable cannot be reset. read-only behavior, it said no 🤷‍♀️

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🔥 SEE ALSO 🔥

the whole friend group, go say hi:

• MPI_T_pvar_handle_alloc
• MPI_T_pvar_get_info
• MPI_T_pvar_session_create
• MPI_T_pvar_write

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👑 COPYRIGHT 👑

2003-2026, The Open MPI Community — the Open MPI Community, absolute legends, holding it down since 2003 🫶

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and that's the page!! written by the Open MPI girlies, dated Sep 11, 2026, third section of the manual, and now you know it through-and-through 💖 go reset something. slay. periodt ✨🦋