From 41f2fbecb324bf8beb06b246542698960cf655fb Mon Sep 17 00:00:00 2001
From: Thomas Fischer <thomas.fischer@ufz.de>
Date: Tue, 2 May 2017 12:14:12 +0200
Subject: [PATCH] [A/U/MP] 'Partition' mesh into one partition.
Useful for debug purposes and scalability measurements.
---
.../PartitionMesh/PartitionMesh.cpp | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/Applications/Utils/ModelPreparation/PartitionMesh/PartitionMesh.cpp b/Applications/Utils/ModelPreparation/PartitionMesh/PartitionMesh.cpp
index 69f5121ccd7..04ef2e9a5f8 100644
--- a/Applications/Utils/ModelPreparation/PartitionMesh/PartitionMesh.cpp
+++ b/Applications/Utils/ModelPreparation/PartitionMesh/PartitionMesh.cpp
@@ -86,6 +86,9 @@ int main(int argc, char* argv[])
mesh_ptr->getNumberOfNodes(),
mesh_ptr->getNumberOfElements());
+ std::size_t const number_of_nodes(mesh_ptr->getNumberOfNodes());
+ std::size_t const number_of_elements(mesh_ptr->getNumberOfElements());
+
ApplicationUtils::NodeWiseMeshPartitioner mesh_partitioner(
nparts.getValue(), std::move(mesh_ptr));
@@ -119,6 +122,25 @@ int main(int argc, char* argv[])
return EXIT_FAILURE;
}
}
+ else if (num_partitions == 1 && exe_metis_flag.getValue())
+ {
+ // The mpmetis tool can not be used for 'partitioning' in only one
+ // domain. For this reason the according files are written for just
+ // one domain in the metis output format in the following.
+ auto writePartitionFile = [&file_name_base](
+ std::string const& file_name_extension, std::size_t number) {
+ std::string const name(file_name_base + file_name_extension);
+ std::ofstream os(name);
+ if (!os)
+ OGS_FATAL("Couldn't open file '%s' for writing.",
+ name.c_str())
+ for (std::size_t n(0); n < number; ++n)
+ os << "0\n";
+ };
+
+ writePartitionFile(".mesh.npart.1", number_of_nodes);
+ writePartitionFile(".mesh.epart.1", number_of_elements);
+ }
mesh_partitioner.readMetisData(file_name_base);
--
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