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vchuravy merged 1 commit into from
Jan 26, 2026
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add note on juliaup and mpiexecjl #932

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8 changes: 8 additions & 0 deletions docs/src/usage.md
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Expand Up @@ -74,6 +74,14 @@ with:
$ mpiexecjl --project=/path/to/project -n 20 julia script.jl
```

!!! note "Juliaup"
If you use `juliaup` as a manager for your `julia` installation and you want to use a non-default channel with `mpiexecjl`,
you need to use the environment variable `JULIAUP_CHANNEL` instead of using the `+` syntax.

```shell
JULIAUP_CHANNEL=1.12 mpiexecjl --project=/path/to/project -n 20 julia script.jl
```

## GPU-aware MPI support

If your MPI implementation has been compiled with CUDA or ROCm support, then `CUDA.CuArray`s (from
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