void xmlToModelPList(const Teuchos::XMLObject &xml, Teuchos::ParameterList & plist)
{
// This method composes a plist for the problem
Teuchos::XMLParameterListReader reader;
plist = reader.toParameterList(xml);
// Get list of valid Zoltan2 Parameters
// Zoltan 2 parameters appear in the input file
// Right now we have default values stored in
// the parameter list, we would like to apply
// the options specified by the user in their
// input file
Teuchos::ParameterList zoltan2Parameters;
Zoltan2::createAllParameters(zoltan2Parameters);
if (plist.isSublist("Zoltan2Parameters")) {
// Apply user specified zoltan2Parameters
ParameterList &sub = plist.sublist("Zoltan2Parameters");
zoltan2Parameters.setParameters(sub);
}
}
int main(int argc, char *argv[]) {
using Teuchos::RCP; // reference count pointers
using Teuchos::rcp;
using Teuchos::TimeMonitor;
//
// MPI initialization using Teuchos
//
Teuchos::GlobalMPISession mpiSession(&argc, &argv, NULL);
RCP< const Teuchos::Comm<int> > comm = Teuchos::DefaultComm<int>::getComm();
//
// Parameters
//
Teuchos::CommandLineProcessor clp(false); // Note:
GO nx,ny,nz;
nx=500;
ny=500;
nz=100;
Galeri::Xpetra::Parameters<GO> matrixParameters(clp, nx, ny, nz, "Laplace2D"); // manage parameters of the test case
Xpetra::Parameters xpetraParameters(clp); // manage parameters of Xpetra
std::string xmlFileName = "scalingTest.xml"; clp.setOption("xml", &xmlFileName, "read parameters from a file. Otherwise, this example uses by default 'scalingTest.xml'");
int amgAsPrecond=1; clp.setOption("precond",&amgAsPrecond,"apply multigrid as preconditioner");
int amgAsSolver=0; clp.setOption("fixPoint",&amgAsSolver,"apply multigrid as solver");
bool printTimings=true; clp.setOption("timings","notimings",&printTimings,"print timings to screen");
switch (clp.parse(argc,argv)) {
case Teuchos::CommandLineProcessor::PARSE_HELP_PRINTED: return EXIT_SUCCESS; break;
case Teuchos::CommandLineProcessor::PARSE_ERROR:
case Teuchos::CommandLineProcessor::PARSE_UNRECOGNIZED_OPTION: return EXIT_FAILURE; break;
case Teuchos::CommandLineProcessor::PARSE_SUCCESSFUL: break;
}
if (comm->getRank() == 0) {
std::cout << "========================================================" << std::endl
<< xpetraParameters << matrixParameters;
}
RCP<TimeMonitor> globalTimeMonitor = rcp (new TimeMonitor(*TimeMonitor::getNewTimer("ScalingTest: S - Global Time")));
// read aggregation options from file
Teuchos::FileInputSource fileSrc(xmlFileName);
Teuchos::XMLObject fileXML = fileSrc.getObject();
Teuchos::XMLParameterListReader listReader;
Teuchos::ParameterList aggList = listReader.toParameterList(fileXML);
//std::cout << "===========aggList start===========" << std::endl;
//aggList.print(std::cout);
//std::cout << "===========aggList end===========" << std::endl;
// instantiate aggregate factory, set options from parameter list
RCP<MueLu::SingleLevelFactoryBase> aggFact;
if (aggList.name() == "UncoupledAggregationFactory") {
RCP<UncoupledAggregationFactory> ucFact = rcp( new UncoupledAggregationFactory() );
//ucFact->SetParameterList(aggList);
//FIXME hack until UCAgg uses PL interface
std::string ordering = aggList.get<std::string>("Ordering");
MueLu::AggOptions::Ordering eordering;
if (ordering=="Natural") eordering = MueLu::AggOptions::NATURAL;
if (ordering=="Graph") eordering = MueLu::AggOptions::GRAPH;
if (ordering=="Random") eordering = MueLu::AggOptions::RANDOM;
ucFact->SetOrdering(eordering);
ucFact->SetMaxNeighAlreadySelected(aggList.get<int>("MaxNeighAlreadySelected"));
ucFact->SetMinNodesPerAggregate(aggList.get<int>("MinNodesPerAggregate"));
aggFact = ucFact;
} else if (aggList.name() == "CoupledAggregationFactory") {
RCP<CoupledAggregationFactory> cFact = rcp( new CoupledAggregationFactory() );
//cFact->SetParameterList(aggList);
//FIXME hack until CoupledAgg uses PL interface
//cFact->SetOrdering(aggList.get<std::string>("Ordering"));
cFact->SetMaxNeighAlreadySelected(aggList.get<int>("MaxNeighAlreadySelected"));
cFact->SetMinNodesPerAggregate(aggList.get<int>("MinNodesPerAggregate"));
aggFact = cFact;
} else {
throw(MueLu::Exceptions::RuntimeError("List's name does not correspond to a known aggregation factory."));
}
//Teuchos::ParameterList tlist = aggFact->GetParameterList();
//std::cout << "===========verify List start===========" << std::endl;
//tlist.print(std::cout);
//std::cout << "===========verify List end===========" << std::endl;
// build matrix
RCP<TimeMonitor> tm = rcp (new TimeMonitor(*TimeMonitor::getNewTimer("ScalingTest: 1 - Matrix Build")));
RCP<const Map> map;
RCP<MultiVector> coordinates;
// Retrieve matrix parameters (they may have been changed on the command line), and pass them to Galeri.
// Galeri will attempt to create a square-as-possible distribution of subdomains di, e.g.,
// d1 d2 d3
// d4 d5 d6
// d7 d8 d9
// d10 d11 d12
// A perfect distribution is only possible when the #processors is a perfect square.
// This *will* result in "strip" distribution if the #processors is a prime number or if the factors are very different in
// size. For example, np=14 will give a 7-by-2 distribution.
// If you don't want Galeri to do this, specify mx or my on the galeriList.
Teuchos::ParameterList pl = matrixParameters.GetParameterList();
Teuchos::ParameterList galeriList;
galeriList.set("nx", pl.get("nx",nx));
galeriList.set("ny", pl.get("ny",ny));
//galeriList.set("mx", comm->getSize());
//galeriList.set("my", 1);
if (matrixParameters.GetMatrixType() == "Laplace1D") {
map = MapFactory::Build(xpetraParameters.GetLib(), matrixParameters.GetNumGlobalElements(), 0, comm);
coordinates = Galeri::Xpetra::Utils::CreateCartesianCoordinates<SC,LO,GO,Map,MultiVector>("1D",map,matrixParameters.GetParameterList());
}
else if (matrixParameters.GetMatrixType() == "Laplace2D" || matrixParameters.GetMatrixType() == "Star2D") {
map = Galeri::Xpetra::CreateMap<LO, GO, Node>(xpetraParameters.GetLib(), "Cartesian2D", comm, galeriList);
coordinates = Galeri::Xpetra::Utils::CreateCartesianCoordinates<SC,LO,GO,Map,MultiVector>("2D",map,matrixParameters.GetParameterList());
}
else if (matrixParameters.GetMatrixType() == "Laplace3D") {
coordinates = Galeri::Xpetra::Utils::CreateCartesianCoordinates<SC,LO,GO,Map,MultiVector>("3D",map,matrixParameters.GetParameterList());
//map = Galeri::Xpetra::CreateMap<LO, GO, Node>(xpetraParameters.GetLib(), "Cartesian3D", comm, galeriList); //TODO when available in Galeri
map = MapFactory::Build(xpetraParameters.GetLib(), matrixParameters.GetNumGlobalElements(), 0, comm);
}
if (comm->getRank() == 0) {
GO mx = galeriList.get("mx", -1);
GO my = galeriList.get("my", -1);
std::cout << "Processor subdomains in x direction: " << mx << std::endl
<< "Processor subdomains in y direction: " << my << std::endl
<< "========================================================" << std::endl;
}
RCP<Galeri::Xpetra::Problem<Map,CrsMatrixWrap,MultiVector> > Pr =
Galeri::Xpetra::BuildProblem<SC,LO,GO,Map,CrsMatrixWrap,MultiVector>(matrixParameters.GetMatrixType(), map, matrixParameters.GetParameterList());
RCP<Matrix> A = Pr->BuildMatrix();
tm = Teuchos::null;
Level level;
RCP<MueLu::FactoryManagerBase> factoryHandler = rcp(new FactoryManager());
level.SetFactoryManager(factoryHandler);
level.SetLevelID(0);
level.Set("A", A);
level.Request("Aggregates", aggFact.get());
level.Request(*aggFact);
level.setVerbLevel(Teuchos::VERB_NONE);
aggFact->setVerbLevel(Teuchos::VERB_NONE);
tm = rcp (new TimeMonitor(*TimeMonitor::getNewTimer("aggregation time")));
aggFact->Build(level);
tm = Teuchos::null;
globalTimeMonitor = Teuchos::null;
if (printTimings)
TimeMonitor::summarize();
} //main
