MPISYNC(1)

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version 5.0.11 · 9 versions
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💅 MPISYNC(1) — bestie's guide to the Open MPI timing tools 🌸

okay so this whole page lives under the Open MPI manual, and it's basically the lore drop for three little utilities that keep your clocks in check. no cap, clock skew is the villain here and these tools are the main characters. let's get into it 🫶

✨ SYNTAX ✨

three icons, three little invocation lines, all slaying in their own way:

mpisync [options]
mpirun_prof [options]
ompi_timing_post [<timing-file>] [<processed-file>]

🎀 DESCRIPTION 🎀

💜 mpisync

literally its whole job: determines clock offsets relative to Head Node Process (HNP). that's the vibe. it accepts the following options:

  • -o, --output — the name of the output file where the offsets related to HNP will be written. that's where the receipts go 💅
  • -h, --help — print help information. the classic "help me help you" moment 🙈

🦋 ompi_timing_post

this one takes the timing output file as input parameter. here's the glow-up sequence: the events are sorted by the timestamps, and then — plot twist — the timestamps are replaced with time offsets relative to the first : previous event. yeah. that's the transformation arc ✨

🔥 mpirun_prof

a wrapper around mpirun that performs clock synchronisation and post-processing of the timing output file. so it's giving assistant energy, but like, the assistant that actually does everything 👑

🌈 NOTES 🌈

the mpisync code was derived from MPIPerf project:

http://mpiperf.cpct.sibsutis.ru/index.php/Main/Documentation

iykyk — gotta give credit where credit's due, bestie 💖

🍓 FILES 🍓

the output file has following format:

<hostname> <round-trip-time> <offset-from-hnp>

three little fields, one big slay. hostname, round-trip-time, and the offset-from-hnp. periodt. ⭐

2003-2026, The Open MPI Community

okay that's the whole page!! and for the cute sign-off: this gorgeous thing is served up from the Open MPI manual, dated Sep 11, 2026 — no notes, iconic, one hundred percent. go sync those clocks bestie, you got this 💅✨🎀

📦 where this page comes from