void CloneRepartitionInterface<Scalar, LocalOrdinal, GlobalOrdinal, Node>::Build(Level ¤tLevel) const {
FactoryMonitor m(*this, "Build", currentLevel);
currentLevel.print(GetOStream(Statistics0,0));
// extract blocked operator A from current level
Teuchos::RCP<Matrix> A = Get< Teuchos::RCP<Matrix> > (currentLevel, "A");
Teuchos::RCP<const Teuchos::Comm< int > > comm = A->getRowMap()->getComm();
// number of Partitions only used for a shortcut.
GO numPartitions = 0;
if (currentLevel.IsAvailable("number of partitions")) {
numPartitions = currentLevel.Get<GO>("number of partitions");
GetOStream(Warnings0) << "Using user-provided \"number of partitions\", the performance is unknown" << std::endl;
}
// ======================================================================================================
// Construct decomposition vector
// ======================================================================================================
RCP<GOVector> decomposition = Teuchos::null;
// extract decomposition vector
decomposition = Get<RCP<GOVector> >(currentLevel, "Partition");
ArrayRCP<const GO> decompEntries = decomposition->getData(0);
if (decomposition.is_null()) {
GetOStream(Warnings0) << "No repartitioning necessary: partitions were left unchanged by the repartitioner" << std::endl;
Set<RCP<const Import> >(currentLevel, "Importer", Teuchos::null);
return;
}
// create new decomposition vector
Teuchos::RCP<GOVector> ret = Xpetra::VectorFactory<GO, LO, GO, NO>::Build(A->getRowMap(), false);
ArrayRCP<GO> retDecompEntries = ret->getDataNonConst(0);
// block size of output vector
LocalOrdinal blkSize = A->GetFixedBlockSize();
// plausibility check!
size_t inLocalLength = decomposition->getLocalLength();
size_t outLocalLength = A->getRowMap()->getNodeNumElements();
size_t numLocalNodes = outLocalLength / blkSize;
TEUCHOS_TEST_FOR_EXCEPTION(Teuchos::as<size_t>(outLocalLength % blkSize) != 0, MueLu::Exceptions::RuntimeError,"CloneRepartitionInterface: inconsistent number of local DOFs (" << outLocalLength << ") and degrees of freedoms ("<<blkSize<<")");
if (numLocalNodes > 0) {
TEUCHOS_TEST_FOR_EXCEPTION(Teuchos::as<size_t>(inLocalLength % numLocalNodes) != 0, MueLu::Exceptions::RuntimeError,"CloneRepartitionInterface: inconsistent number of local DOFs (" << inLocalLength << ") and number of local nodes (" << numLocalNodes << ")");
LocalOrdinal inBlkSize = Teuchos::as<LocalOrdinal>(inLocalLength / numLocalNodes);
//TEUCHOS_TEST_FOR_EXCEPTION(blkSize != inBlkSize, MueLu::Exceptions::RuntimeError,"CloneRepartitionInterface: input block size = " << inBlkSize << " outpub block size = " << blkSize << ". They should be the same.");
for(LO i = 0; i<Teuchos::as<LO>(numLocalNodes); i++) {
for(LO j = 0; j < blkSize; j++) {
retDecompEntries[i*blkSize + j] = Teuchos::as<GO>(decompEntries[i*inBlkSize]);
}
}
} // end if numLocalNodes > 0
Set(currentLevel, "Partition", ret);
} //Build()
void CloneRepartitionInterface<Scalar, LocalOrdinal, GlobalOrdinal, Node>::Build(Level ¤tLevel) const {
FactoryMonitor m(*this, "Build", currentLevel);
currentLevel.print(GetOStream(Statistics0,0));
// extract blocked operator A from current level
Teuchos::RCP<Matrix> A = Get< Teuchos::RCP<Matrix> > (currentLevel, "A");
Teuchos::RCP<const Teuchos::Comm< int > > comm = A->getRowMap()->getComm();
// number of Partitions only used for a shortcut.
GO numPartitions = 0;
if (currentLevel.IsAvailable("number of partitions")) {
numPartitions = currentLevel.Get<GO>("number of partitions");
GetOStream(Warnings0) << "Using user-provided \"number of partitions\", the performance is unknown" << std::endl;
}
// ======================================================================================================
// Construct decomposition vector
// ======================================================================================================
RCP<GOVector> decomposition = Teuchos::null;
// extract decomposition vector
decomposition = Get<RCP<GOVector> >(currentLevel, "Partition");
ArrayRCP<const GO> decompEntries = decomposition->getData(0);
if (decomposition.is_null()) {
GetOStream(Warnings0) << "No repartitioning necessary: partitions were left unchanged by the repartitioner" << std::endl;
Set<RCP<const Import> >(currentLevel, "Importer", Teuchos::null);
return;
}
// create new decomposition vector
Teuchos::RCP<GOVector> ret = Xpetra::VectorFactory<GO, LO, GO, NO>::Build(A->getRowMap(), false);
ArrayRCP<GO> retDecompEntries = ret->getDataNonConst(0);
// block size of output vector
LocalOrdinal blkSize = 1;
// check for blocking/striding information
if(A->IsView("stridedMaps") &&
Teuchos::rcp_dynamic_cast<const StridedMap>(A->getRowMap("stridedMaps")) != Teuchos::null) {
Xpetra::viewLabel_t oldView = A->SwitchToView("stridedMaps"); // note: "stridedMaps are always non-overlapping (correspond to range and domain maps!)
RCP<const StridedMap> strMap = Teuchos::rcp_dynamic_cast<const StridedMap>(A->getRowMap());
TEUCHOS_TEST_FOR_EXCEPTION(strMap == Teuchos::null,Exceptions::BadCast,"MueLu::CloneRepartitionInterface::Build: cast to strided row map failed.");
LocalOrdinal stridedBlock = strMap->getStridedBlockId();
if (stridedBlock == -1)
blkSize = strMap->getFixedBlockSize();
else {
std::vector<size_t> strInfo = strMap->getStridingData();
blkSize = strInfo[stridedBlock];
}
oldView = A->SwitchToView(oldView);
GetOStream(Statistics1) << "CloneRepartitionInterface::Build():" << " found blockdim=" << blkSize << " from strided maps."<< std::endl;
} else {
GetOStream(Statistics1) << "CloneRepartitionInterface::Build(): no striding information available. Use blockdim=" << blkSize << " (DofsPerNode)." << std::endl;
blkSize = A->GetFixedBlockSize();
}
// plausibility check!
size_t inLocalLength = decomposition->getLocalLength();
size_t outLocalLength = A->getRowMap()->getNodeNumElements();
// only for non-strided maps
size_t numLocalNodes = outLocalLength / blkSize;
TEUCHOS_TEST_FOR_EXCEPTION(Teuchos::as<size_t>(outLocalLength % blkSize) != 0, MueLu::Exceptions::RuntimeError,"CloneRepartitionInterface: inconsistent number of local DOFs (" << outLocalLength << ") and degrees of freedoms (" << blkSize <<")");
if (numLocalNodes > 0) {
TEUCHOS_TEST_FOR_EXCEPTION(Teuchos::as<size_t>(inLocalLength % numLocalNodes) != 0, MueLu::Exceptions::RuntimeError,"CloneRepartitionInterface: inconsistent number of local DOFs (" << inLocalLength << ") and number of local nodes (" << numLocalNodes << ")");
LocalOrdinal inBlkSize = Teuchos::as<LocalOrdinal>(inLocalLength / numLocalNodes);
//TEUCHOS_TEST_FOR_EXCEPTION(blkSize != inBlkSize, MueLu::Exceptions::RuntimeError,"CloneRepartitionInterface: input block size = " << inBlkSize << " outpub block size = " << blkSize << ". They should be the same.");
for(LO i = 0; i<Teuchos::as<LO>(numLocalNodes); i++) {
for(LO j = 0; j < blkSize; j++) {
retDecompEntries[i*blkSize + j] = Teuchos::as<GO>(decompEntries[i*inBlkSize]);
}
}
} // end if numLocalNodes > 0
Set(currentLevel, "Partition", ret);
} //Build()