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Helmholtz3D.cpp
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// @HEADER
// *****************************************************************************
// MueLu: A package for multigrid based preconditioning
//
// Copyright 2012 NTESS and the MueLu contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER
#include <iostream>
#include <complex>
// Xpetra and Galeri
#include <Xpetra_MultiVectorFactory.hpp>
#include <Galeri_XpetraParameters.hpp>
#include <Galeri_XpetraProblemFactory_Helmholtz.hpp>
#include <Galeri_XpetraUtils.hpp>
#include <Galeri_XpetraMaps.hpp>
// MueLu
#include <MueLu_ShiftedLaplacian.hpp>
#include <MueLu_UseDefaultTypesComplex.hpp>
#include <MueLu_MutuallyExclusiveTime.hpp>
int main(int argc, char *argv[]) {
#include <MueLu_UseShortNames.hpp>
typedef Tpetra::Vector<SC, LO, GO, NO> TVEC;
typedef Tpetra::MultiVector<SC, LO, GO, NO> TMV;
typedef Tpetra::CrsMatrix<SC, LO, GO, NO> TCRS;
typedef Xpetra::CrsMatrix<SC, LO, GO, NO> XCRS;
typedef Xpetra::TpetraCrsMatrix<SC, LO, GO, NO> XTCRS;
typedef Xpetra::Matrix<SC, LO, GO, NO> XMAT;
typedef Xpetra::CrsMatrixWrap<SC, LO, GO, NO> XWRAP;
typedef typename Teuchos::ScalarTraits<SC>::magnitudeType real_type;
typedef Xpetra::MultiVector<real_type, LO, GO, NO> RealValuedMultiVector;
using Teuchos::RCP;
using Teuchos::rcp;
using Teuchos::TimeMonitor;
Teuchos::GlobalMPISession mpiSession(&argc, &argv, NULL);
bool success = false;
bool verbose = true;
try {
RCP<const Teuchos::Comm<int> > comm = Teuchos::DefaultComm<int>::getComm();
Teuchos::CommandLineProcessor clp(false);
//***********************//
// Galeri Parameters //
//***********************//
GO nx, ny, nz;
GO mx, my, mz;
double stretchx, stretchy, stretchz, h, delta;
int PMLXL, PMLXR, PMLYL, PMLYR, PMLZL, PMLZR;
double omega, shift;
int model;
std::ifstream inputfile;
inputfile.open("helm3D.inp");
inputfile >> nx >> ny >> nz;
if (comm->getRank() == 0)
std::cout << "nx: " << nx << " ny: " << ny << " nz: " << nz << std::endl;
inputfile >> stretchx >> stretchy >> stretchz;
if (comm->getRank() == 0)
std::cout << "stretchx: " << stretchx << " stretchy: " << stretchy << " stretchz: " << stretchz << std::endl;
inputfile >> h >> delta;
if (comm->getRank() == 0)
std::cout << "h: " << h << " delta: " << delta << std::endl;
inputfile >> PMLXL >> PMLXR;
if (comm->getRank() == 0)
std::cout << "PMLXL: " << PMLXL << " PMLXR: " << PMLXR << std::endl;
inputfile >> PMLYL >> PMLYR;
if (comm->getRank() == 0)
std::cout << "PMLYL: " << PMLYL << " PMLYR: " << PMLYR << std::endl;
inputfile >> PMLZL >> PMLZR;
if (comm->getRank() == 0)
std::cout << "PMLZL: " << PMLZL << " PMLZR: " << PMLZR << std::endl;
inputfile >> omega >> shift;
if (comm->getRank() == 0)
std::cout << "omega: " << omega << " shift: " << shift << std::endl;
inputfile >> mx >> my >> mz;
if (comm->getRank() == 0)
std::cout << "mx: " << mx << " my: " << my << " mz: " << mz << std::endl;
inputfile >> model;
if (comm->getRank() == 0)
std::cout << "velocity model: " << model << std::endl;
Galeri::Xpetra::Parameters<GO> matrixParameters_helmholtz(clp, nx, ny, nz, "Helmholtz3D", 0, stretchx, stretchy, stretchz,
h, delta, PMLXL, PMLXR, PMLYL, PMLYR, PMLZL, PMLZR, omega, 0.0, mx, my, mz, model);
Galeri::Xpetra::Parameters<GO> matrixParameters_shifted(clp, nx, ny, nz, "Helmholtz3D", 0, stretchx, stretchy, stretchz,
h, delta, PMLXL, PMLXR, PMLYL, PMLYR, PMLZL, PMLZR, omega, shift, mx, my, mz, model);
Xpetra::Parameters xpetraParameters(clp);
//****************************************//
// Setup Galeri Problems and Matrices //
//****************************************//
RCP<TimeMonitor> globalTimeMonitor = rcp(new TimeMonitor(*TimeMonitor::getNewTimer("ScalingTest: S - Global Time")));
RCP<TimeMonitor> tm = rcp(new TimeMonitor(*TimeMonitor::getNewTimer("ScalingTest: 1 - Matrix Build")));
Teuchos::ParameterList pl = matrixParameters_helmholtz.GetParameterList();
RCP<RealValuedMultiVector> coordinates;
Teuchos::ParameterList galeriList;
galeriList.set("nx", pl.get("nx", nx));
galeriList.set("ny", pl.get("ny", ny));
galeriList.set("nz", pl.get("nz", nz));
RCP<const Map> map;
map = Galeri::Xpetra::CreateMap<LO, GO, Node>(xpetraParameters.GetLib(), "Cartesian3D", comm, galeriList);
coordinates = Galeri::Xpetra::Utils::CreateCartesianCoordinates<SC, LO, GO, Map, RealValuedMultiVector>("3D", map, matrixParameters_helmholtz.GetParameterList());
RCP<const Tpetra::Map<LO, GO, NO> > tmap = Xpetra::toTpetra(map);
Teuchos::ParameterList matrixParams_helmholtz = matrixParameters_helmholtz.GetParameterList();
Teuchos::ParameterList matrixParams_shifted = matrixParameters_shifted.GetParameterList();
RCP<Galeri::Xpetra::Problem_Helmholtz<Map, CrsMatrixWrap, MultiVector> > Pr_helmholtz =
Galeri::Xpetra::BuildProblem_Helmholtz<SC, LO, GO, Map, CrsMatrixWrap, MultiVector>(matrixParameters_helmholtz.GetMatrixType(), map, matrixParams_helmholtz);
RCP<Matrix> Amat = Pr_helmholtz->BuildMatrix();
RCP<Galeri::Xpetra::Problem_Helmholtz<Map, CrsMatrixWrap, MultiVector> > Pr_shifted =
Galeri::Xpetra::BuildProblem_Helmholtz<SC, LO, GO, Map, CrsMatrixWrap, MultiVector>(matrixParameters_shifted.GetMatrixType(), map, matrixParams_shifted);
RCP<Matrix> Pmat = Pr_shifted->BuildMatrix();
comm->barrier();
tm = Teuchos::null;
//*************************************************************//
// Setup Shifted Laplacian Preconditioner and Belos Solver //
//*************************************************************//
tm = rcp(new TimeMonitor(*TimeMonitor::getNewTimer("ScalingTest: 2 - MueLu Setup")));
// initialize with the Shifted Laplacian operator (Pmat)
RCP<ShiftedLaplacian> SLSolver = rcp(new ShiftedLaplacian);
SLSolver->setPreconditioningMatrix(Pmat);
SLSolver->initialize();
// set Helmholtz operator (Amat)
SLSolver->setProblemMatrix(Amat);
// setup with SL operator
SLSolver->setupNormalRAP();
tm = Teuchos::null;
//************************************//
// Solve linear system with Belos //
//************************************//
tm = rcp(new TimeMonitor(*TimeMonitor::getNewTimer("ScalingTest: 3 - LHS and RHS initialization")));
RCP<TMV> X = Tpetra::createMultiVector<SC, LO, GO, NO>(tmap, 1);
RCP<TMV> B = Tpetra::createMultiVector<SC, LO, GO, NO>(tmap, 1);
X->putScalar((SC)0.0);
B->putScalar((SC)0.0);
int pointsourceid = nx * ny * nz / 2 + nx * ny / 2 + nx / 2;
if (map->isNodeGlobalElement(pointsourceid) == true) {
B->replaceGlobalValue(pointsourceid, 0, (SC)1.0);
}
tm = Teuchos::null;
tm = rcp(new TimeMonitor(*TimeMonitor::getNewTimer("ScalingTest: 4 - Belos Solve")));
SLSolver->solve(B, X);
tm = Teuchos::null;
globalTimeMonitor = Teuchos::null;
TimeMonitor::summarize();
success = true;
}
TEUCHOS_STANDARD_CATCH_STATEMENTS(verbose, std::cerr, success);
return (success ? EXIT_SUCCESS : EXIT_FAILURE);
} // main