From 91289a352c8c5a3a0394e070fabb70c766abdfd8 Mon Sep 17 00:00:00 2001
From: Thomas Witkowski <thomas.witkowski@gmx.de>
Date: Thu, 24 May 2012 13:21:28 +0000
Subject: [PATCH] Fixed partitioning issue with empty partitiones.
---
AMDiS/src/parallel/MeshDistributor.cc | 4 ++++
AMDiS/src/parallel/ZoltanPartitioner.cc | 7 +++++++
2 files changed, 11 insertions(+)
diff --git a/AMDiS/src/parallel/MeshDistributor.cc b/AMDiS/src/parallel/MeshDistributor.cc
index 7823e1f1..fdc0e96b 100644
--- a/AMDiS/src/parallel/MeshDistributor.cc
+++ b/AMDiS/src/parallel/MeshDistributor.cc
@@ -1283,6 +1283,10 @@ namespace AMDiS {
return;
}
+ TEST_EXIT_DBG(!(partitioner->getSendElements().size() == mesh->getMacroElements().size() &&
+ partitioner->getRecvElements().size() == 0))
+ ("Partition is empty, should not happen!\n");
+
// === Create map that maps macro element indices to pointers to the ===
// === macro elements. ===
diff --git a/AMDiS/src/parallel/ZoltanPartitioner.cc b/AMDiS/src/parallel/ZoltanPartitioner.cc
index 77ba7f9b..cce8a3a3 100644
--- a/AMDiS/src/parallel/ZoltanPartitioner.cc
+++ b/AMDiS/src/parallel/ZoltanPartitioner.cc
@@ -97,6 +97,13 @@ namespace AMDiS {
recvElements.clear();
sendElements.clear();
+ int createEmptyPartition =
+ (mesh->getMacroElements().size() == nExportEls && nImportEls == 0);
+ mpi::globalMax(createEmptyPartition);
+
+ if (createEmptyPartition > 0)
+ err = ZOLTAN_FATAL;
+
if (err == ZOLTAN_OK && changes != 0) {
if (nImportEls > 0) {
for (int i = 0; i < nImportEls; i++) {
--
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