From f6275747d3a68bc5434a496253f3b8dba8b0324b Mon Sep 17 00:00:00 2001
From: Martin Bauer <martin.bauer@fau.de>
Date: Mon, 18 Feb 2019 13:00:54 +0100
Subject: [PATCH] Fix for old MPICH versions that do not support
MPI_COMM_TYPE_SHARED
- for example conda ships this old MPI version
---
src/cuda/DeviceSelectMPI.cpp | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/src/cuda/DeviceSelectMPI.cpp b/src/cuda/DeviceSelectMPI.cpp
index 4fdab2f92..d934abe79 100644
--- a/src/cuda/DeviceSelectMPI.cpp
+++ b/src/cuda/DeviceSelectMPI.cpp
@@ -27,7 +27,15 @@
namespace walberla {
namespace cuda {
-#ifdef WALBERLA_BUILD_WITH_MPI
+#if MPI_VERSION == 2 || MPI_VERSION == 1
+
+#ifndef MPI_COMM_TYPE_SHARED
+
+void selectDeviceBasedOnMpiRank() {
+ WALBERLA_ABORT("Your MPI implementation is tool old - it does not support CUDA device selection based on MPI rank");
+}
+
+#else
void selectDeviceBasedOnMpiRank()
{
@@ -62,6 +70,8 @@ void selectDeviceBasedOnMpiRank()
WALBERLA_CUDA_CHECK( cudaSetDevice( rankOnNode % deviceCount ) );
}
}
+#endif
+
#else
--
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