From 782b20934116246f70e83fe7d8557f5810edf3b6 Mon Sep 17 00:00:00 2001
From: zjwegert <60646897+zjwegert@users.noreply.github.com>
Date: Fri, 5 Jul 2024 10:27:47 +1000
Subject: [PATCH] update readme

---
 scripts/Benchmarks/hpc-enviroments-setonix/README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/Benchmarks/hpc-enviroments-setonix/README.md b/scripts/Benchmarks/hpc-enviroments-setonix/README.md
index 3423ca98..fac889ba 100644
--- a/scripts/Benchmarks/hpc-enviroments-setonix/README.md
+++ b/scripts/Benchmarks/hpc-enviroments-setonix/README.md
@@ -19,6 +19,10 @@ We also provide scripts `install-p4est.sh` and `install-petsc.sh` that using the
 To load julia, you might add `module load julia/X.Y.Z` to your `.bashrc` or setup your own binaries in `$HOME/bin/julia/X.Y.Z` and then add it to your path.
 
 ## MPICH Usage
+Setonix uses Cray-MPICH. To tell MPI.jl that this is the case, use
+```julia
+MPIPreferences.use_system_binary(mpiexec="srun", vendor="cray")
+```
 
 When running multi-node jobs the following enviroment variables must be set:
 ```bash