From 4c51a1771bdca0d4e9ed2e99ec15290c1806d51e Mon Sep 17 00:00:00 2001
From: Guilherme Pantoja Calandrini de Azevedo Junior
 <guilherme.calandrini@tu-dresden.de>
Date: Fri, 24 Feb 2023 14:30:04 +0100
Subject: [PATCH] How to check if OpenMPI has support for CUDA

---
 doc.zih.tu-dresden.de/docs/software/gpu_programming.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/doc.zih.tu-dresden.de/docs/software/gpu_programming.md b/doc.zih.tu-dresden.de/docs/software/gpu_programming.md
index af027d612..26f6ce873 100644
--- a/doc.zih.tu-dresden.de/docs/software/gpu_programming.md
+++ b/doc.zih.tu-dresden.de/docs/software/gpu_programming.md
@@ -200,6 +200,13 @@ detail in [nvcc documentation](https://docs.nvidia.com/cuda/cuda-compiler-driver
 This compiler is available via several `CUDA` packages, a default version can be loaded via
 `module load CUDA`. Additionally, the `NVHPC` modules provide CUDA tools as well.
 
+For using CUDA with OpenMPI at multiple nodes, the OpenMPI module loaded shall have be compiled with CUDA 
+support. If you aren't sure if the module you are using has support for it you can check it as following:
+
+```console
+ompi_info --parsable --all | grep mpi_built_with_cuda_support:value | awk -F":" '{print "OpenMPI supports CUDA:",$7}'
+```
+
 #### Usage of the CUDA compiler
 
 The simple invocation `nvcc <code.cu>` will compile a valid CUDA program. `nvcc` differentiates
-- 
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