From 2294b649de224448a33b7ad250368d8a9e565289 Mon Sep 17 00:00:00 2001
From: Anna Wellmann <a.wellmann@tu-braunschweig.de>
Date: Wed, 6 Oct 2021 15:41:11 +0200
Subject: [PATCH] Only call methods for grid exchange when using multiple
processes
cherry-picked from d954628
---
src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp b/src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp
index d62e9607d..96f5287fc 100644
--- a/src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp
+++ b/src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp
@@ -92,13 +92,16 @@ void updateGrid27(Parameter *para, vf::gpu::Communicator *comm, CudaMemoryManage
}
coarseToFine(para, level);
- } else {
+ } else if (para->getNumprocs() > 1) {
fineToCoarse(para, level);
- prepareExchangeMultiGPU(para, level, -1);
- exchangeMultiGPU(para, comm, cudaManager, level, -1);
+ prepareExchangeMultiGPU(para, level, -1);
+ exchangeMultiGPU(para, comm, cudaManager, level, -1);
coarseToFine(para, level);
+ } else {
+ fineToCoarse(para, level);
+ coarseToFine(para, level);
}
}
}
--
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