#include "BelosEpetraAdapter.hpp"
#include "createEpetraProblem.hpp"
#include "Ifpack_IlukGraph.h"
#include "Ifpack_CrsRiluk.h"
#include "Epetra_CrsMatrix.h"
#include "Epetra_Map.h"
#include "Teuchos_CommandLineProcessor.hpp"
#include "Teuchos_ParameterList.hpp"
#include "Teuchos_StandardCatchMacros.hpp"
int main(int argc, char *argv[]) {
Teuchos::GlobalMPISession session(&argc, &argv, NULL);
typedef double ST;
typedef Teuchos::ScalarTraits<ST> SCT;
typedef SCT::magnitudeType MT;
using Teuchos::ParameterList;
using Teuchos::RCP;
using Teuchos::rcp;
bool verbose = false;
bool success = true;
try {
bool proc_verbose = false;
bool leftprec = true;
int frequency = -1;
int numrhs = 1;
int maxiters = -1;
std::string filename("orsirr1.hb");
MT tol = 1.0e-5;
Teuchos::CommandLineProcessor cmdp(false,true);
cmdp.setOption("verbose","quiet",&verbose,"Print messages and results.");
cmdp.setOption("left-prec","right-prec",&leftprec,"Left preconditioning or right.");
cmdp.setOption("frequency",&frequency,"Solvers frequency for printing residuals (#iters).");
cmdp.setOption("filename",&filename,"Filename for Harwell-Boeing test matrix.");
cmdp.setOption("tol",&tol,"Relative residual tolerance used by GMRES solver.");
cmdp.setOption("num-rhs",&numrhs,"Number of right-hand sides to be solved for.");
cmdp.setOption("maxiters",&maxiters,"Maximum number of iterations per linear system (-1 = adapted to problem/block size).");
if (cmdp.parse(argc,argv) != Teuchos::CommandLineProcessor::PARSE_SUCCESSFUL) {
return -1;
}
if (!verbose)
frequency = -1;
int MyPID;
RCP<Epetra_CrsMatrix> A;
int return_val =Belos::createEpetraProblem(filename,NULL,&A,NULL,NULL,&MyPID);
if(return_val != 0) return return_val;
proc_verbose = verbose && (MyPID==0);
if (proc_verbose) std::cout << std::endl << std::endl;
if (proc_verbose) std::cout << "Constructing ILU preconditioner" << std::endl;
int Lfill = 2;
if (proc_verbose) std::cout << "Using Lfill = " << Lfill << std::endl;
int Overlap = 2;
if (proc_verbose) std::cout << "Using Level Overlap = " << Overlap << std::endl;
double Athresh = 0.0;
if (proc_verbose) std::cout << "Using Absolute Threshold Value of " << Athresh << std::endl;
double Rthresh = 1.0;
if (proc_verbose) std::cout << "Using Relative Threshold Value of " << Rthresh << std::endl;
Teuchos::RCP<Ifpack_IlukGraph> ilukGraph;
Teuchos::RCP<Ifpack_CrsRiluk> ilukFactors;
if (Lfill > -1) {
ilukGraph = Teuchos::rcp(new Ifpack_IlukGraph(A->Graph(), Lfill, Overlap));
int info = ilukGraph->ConstructFilledGraph();
assert( info == 0 );
ilukFactors = Teuchos::rcp(new Ifpack_CrsRiluk(*ilukGraph));
int initerr = ilukFactors->InitValues(*A);
if (initerr != 0) std::cout << "InitValues error = " << initerr;
info = ilukFactors->Factor();
assert( info == 0 );
}
bool transA = false;
double Cond_Est;
ilukFactors->Condest(transA, Cond_Est);
if (proc_verbose) {
std::cout << "Condition number estimate for this preconditoner = " << Cond_Est << std::endl;
std::cout << std::endl;
}
RCP<Belos::EpetraPrecOp> Prec = rcp( new Belos::EpetraPrecOp( ilukFactors ) );
if (maxiters == -1)
maxiters = NumGlobalElements - 1;
ParameterList belosList;
belosList.set( "Maximum Iterations", maxiters );
belosList.set( "Convergence Tolerance", tol );
if (leftprec)
belosList.set( "Explicit Residual Test", true );
if (verbose) {
if (frequency > 0)
belosList.set( "Output Frequency", frequency );
}
else
X->PutScalar( 0.0 );
B->Random();
if (leftprec)
else
if (set == false) {
if (proc_verbose)
std::cout << std::endl << "ERROR: Belos::LinearProblem failed to set up correctly!" << std::endl;
return -1;
}
Teuchos::RCP< Belos::PseudoBlockTFQMRSolMgr<double,MV,OP> > solver =
if (proc_verbose) {
std::cout << std::endl << std::endl;
std::cout << "Dimension of matrix: " << NumGlobalElements << std::endl;
std::cout << "Number of right-hand sides: " << numrhs << std::endl;
std::cout << "Max number of Pseudo Block TFQMR iterations: " << maxiters << std::endl;
std::cout << "Relative residual tolerance: " << tol << std::endl;
std::cout << std::endl;
}
bool badRes = false;
std::vector<double> actual_resids( numrhs );
std::vector<double> rhs_norm( numrhs );
OPT::Apply( *A, *X, R );
MVT::MvAddMv( -1.0, R, 1.0, *B, R );
MVT::MvNorm( R, actual_resids );
MVT::MvNorm( *B, rhs_norm );
if (proc_verbose) {
std::cout<< "---------- Actual Residuals (normalized) ----------"<<std::endl<<std::endl;
for ( int i=0; i<numrhs; i++) {
double actRes = actual_resids[i]/rhs_norm[i];
std::cout<<"Problem "<<i<<" : \t"<< actRes <<std::endl;
if (actRes > tol ) badRes = true;
}
}
success = false;
if (proc_verbose)
std::cout << std::endl << "ERROR: Belos did not converge!" << std::endl;
} else {
success = true;
if (proc_verbose)
std::cout << std::endl << "SUCCESS: Belos converged!" << std::endl;
}
}
TEUCHOS_STANDARD_CATCH_STATEMENTS(verbose, std::cerr, success);
return success ? EXIT_SUCCESS : EXIT_FAILURE;
}