---
name: "mpisync"
section: "1"
platform: "linux"
package: "openmpi"
version: "5.0.11-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/mpisync"
---

# mpisync(1)

mpisync — Open MPI timing tools

## SYNTAX

**mpisync \[options\]**

**mpirun\_prof \[options\]**

**ompi\_timing\_post \[\<timing-file\>\] \[\<processed-file\>\]**

## DESCRIPTION

**mpisync**: determines clock offsets relative to Head Node Process (HNP). It accepts the following options:

- •

  **-o**, **--output**: The name of output file where offsets related to HNP will be written

- •

  **-h**, **--help**: Print help information

**ompi\_timing\_post** takes the timing output file as input parameter. The events are sorted by the timestamps. Next, the timestamps are replaced with time offsets relative to the **first** : **previous** event.

**mpirun\_prof** is a wrapper around *mpirun* that performs clock synchronisation and post-processing of the timing output file.

## NOTES

The mpisync code was derived from MPIPerf project: *http://mpiperf.cpct.sibsutis.ru/index.php/Main/Documentation*

## FILES

The output file has following format:

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

## COPYRIGHT

2003-2026, The Open MPI Community