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mpirun — Execute serial and parallel jobs in Open MPI. See also: `mpic++`. More information: <https://docs.op

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandmpirunandparallelexecutecliserialjobs

Problem

How to use the mpirun command: Execute serial and parallel jobs in Open MPI. See also: mpic++. More information: <https://docs.open-mpi.org/en/main/man-openmpi/man1/mpirun.1.html>.

Solution

mpirun — Execute serial and parallel jobs in Open MPI. See also: mpic++. More information: <https://docs.open-mpi.org/en/main/man-openmpi/man1/mpirun.1.html>.

Execute an Open MPI program:

mpirun {{path/to/executable}}

Execute an Open MPI program with n parallel processes:

mpirun -n {{n}} {{path/to/executable}}

Allow more processes than available physical cores:

mpirun -oversubscribe {{path/to/executable}}

Code Snippets

Execute an Open MPI program

mpirun {{path/to/executable}}

Execute an Open MPI program with `n` parallel processes

mpirun -n {{n}} {{path/to/executable}}

Allow more processes than available physical cores

mpirun -oversubscribe {{path/to/executable}}

Context

tldr-pages: common/mpirun

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