123 typedef typename Teuchos::ScalarTraits<SC>::coordinateType real_type;
124 typedef typename Xpetra::MultiVector<real_type,LO,GO,NO> RealValuedMultiVector;
126 RCP<Matrix> A = Get<RCP<Matrix> >(level,
"A");
127 RCP<const Map> rowMap = A->getRowMap();
128 LO blkSize = A->GetFixedBlockSize();
130 int numParts = Get<int>(level,
"number of partitions");
131 if (numParts == 1 || numParts == -1) {
133 RCP<Xpetra::Vector<GO,LO,GO,NO> > decomposition = Xpetra::VectorFactory<GO, LO, GO, NO>::Build(rowMap,
true);
134 Set(level,
"Partition", decomposition);
144 const ParameterList& pL = GetParameterList();
146 RCP<const ParameterList> providedList = pL.get<RCP<const ParameterList> >(
"ParameterList");
147 ParameterList Zoltan2Params;
148 if (providedList != Teuchos::null)
149 Zoltan2Params = *providedList;
153 for (ParameterList::ConstIterator param = defaultZoltan2Params->begin(); param != defaultZoltan2Params->end(); param++) {
154 const std::string& pName = defaultZoltan2Params->name(param);
155 if (!Zoltan2Params.isParameter(pName))
156 Zoltan2Params.setEntry(pName, defaultZoltan2Params->getEntry(pName));
158 Zoltan2Params.set(
"num_global_parts", Teuchos::as<int>(numParts));
160 GetOStream(
Runtime0) <<
"Zoltan2 parameters:\n----------\n" << Zoltan2Params <<
"----------" << std::endl;
162 const std::string& algo = Zoltan2Params.get<std::string>(
"algorithm");
164 if (algo ==
"multijagged" || algo ==
"rcb") {
166 RCP<RealValuedMultiVector> coords = Get<RCP<RealValuedMultiVector> >(level,
"Coordinates");
167 RCP<const Map> map = coords->getMap();
168 GO numElements = map->getLocalNumElements();
171 TEUCHOS_TEST_FOR_EXCEPTION(rowMap->getLocalNumElements()/blkSize != coords->getLocalLength(),
Exceptions::Incompatible,
172 "Coordinate vector length (" +
toString(coords->getLocalLength()) <<
" is incompatible with number of block rows in A ("
173 +
toString(rowMap->getLocalNumElements()/blkSize) +
"The vector length should be the same as the number of mesh points.");
174#ifdef HAVE_MUELU_DEBUG
175 GO indexBase = rowMap->getIndexBase();
176 GetOStream(
Runtime0) <<
"Checking consistence of row and coordinates maps" << std::endl;
178 ArrayView<const GO> rowElements = rowMap->getLocalElementList();
179 ArrayView<const GO> coordsElements = map ->getLocalElementList();
180 for (LO i = 0; i < Teuchos::as<LO>(numElements); i++)
181 TEUCHOS_TEST_FOR_EXCEPTION((coordsElements[i]-indexBase)*blkSize + indexBase != rowElements[i*blkSize],
183 <<
", row GID = " << rowElements[i*blkSize] <<
", blkSize = " << blkSize << std::endl);
186 typedef Zoltan2::XpetraMultiVectorAdapter<RealValuedMultiVector> InputAdapterType;
187 typedef Zoltan2::PartitioningProblem<InputAdapterType> ProblemType;
189 Array<real_type> weightsPerRow(numElements);
190 for (LO i = 0; i < numElements; i++) {
191 weightsPerRow[i] = 0.0;
193 for (LO j = 0; j < blkSize; j++) {
194 weightsPerRow[i] += A->getNumEntriesInLocalRow(i*blkSize+j);
199 if(algo ==
"multijagged" && !Zoltan2Params.isParameter(
"mj_premigration_coordinate_count")) {
200 LO heuristicTargetRowsPerProcess = Get<LO>(level,
"repartition: heuristic target rows per process");
201 Zoltan2Params.set(
"mj_premigration_coordinate_count", heuristicTargetRowsPerProcess);
203 const bool writeZoltan2DebuggingFiles = Zoltan2Params.get(
"mj_debug",
false);
204 Zoltan2Params.remove(
"mj_debug");
206 std::vector<int> strides;
207 std::vector<const real_type*> weights(1, weightsPerRow.getRawPtr());
209 RCP<const Teuchos::MpiComm<int> > dupMpiComm = rcp_dynamic_cast<const Teuchos::MpiComm<int> >(rowMap->getComm()->duplicate());
210 RCP<const Teuchos::OpaqueWrapper<MPI_Comm> > zoltanComm = dupMpiComm->getRawMpiComm();
212 InputAdapterType adapter(coords, weights, strides);
213 RCP<ProblemType> problem(
new ProblemType(&adapter, &Zoltan2Params, (*zoltanComm)()));
217 if (writeZoltan2DebuggingFiles)
218 adapter.generateFiles((
"mj_debug.lvl_"+std::to_string(level.GetLevelID())).c_str(), *(rowMap->getComm()));
222 RCP<Xpetra::Vector<GO,LO,GO,NO> > decomposition = Xpetra::VectorFactory<GO,LO,GO,NO>::Build(rowMap,
false);
223 ArrayRCP<GO> decompEntries = decomposition->getDataNonConst(0);
225 const typename InputAdapterType::part_t * parts = problem->getSolution().getPartListView();
227 for (GO i = 0; i < numElements; i++) {
228 int partNum = parts[i];
230 for (LO j = 0; j < blkSize; j++)
231 decompEntries[i*blkSize + j] = partNum;
234 Set(level,
"Partition", decomposition);
238 GO numElements = rowMap->getLocalNumElements();
240 typedef Zoltan2::XpetraCrsGraphAdapter<CrsGraph> InputAdapterType;
241 typedef Zoltan2::PartitioningProblem<InputAdapterType> ProblemType;
243 RCP<const Teuchos::MpiComm<int> > dupMpiComm = rcp_dynamic_cast<const Teuchos::MpiComm<int> >(rowMap->getComm()->duplicate());
244 RCP<const Teuchos::OpaqueWrapper<MPI_Comm> > zoltanComm = dupMpiComm->getRawMpiComm();
246 InputAdapterType adapter(A->getCrsGraph());
247 RCP<ProblemType> problem(
new ProblemType(&adapter, &Zoltan2Params, (*zoltanComm)()));
254 RCP<Xpetra::Vector<GO,LO,GO,NO> > decomposition = Xpetra::VectorFactory<GO,LO,GO,NO>::Build(rowMap,
false);
255 ArrayRCP<GO> decompEntries = decomposition->getDataNonConst(0);
257 const typename InputAdapterType::part_t * parts = problem->getSolution().getPartListView();
260 for (GO i = 0; i < numElements/blkSize; i++) {
261 int partNum = parts[i*blkSize];
263 for (LO j = 0; j < blkSize; j++)
264 decompEntries[i*blkSize + j] = partNum;
267 Set(level,
"Partition", decomposition);