#include "ml_config.h"
#include "ml_common.h"
#if defined(HAVE_ML_MLAPI) && defined(HAVE_ML_GALERI)
using namespace Teuchos;
int main(int argc, char *argv[])
{
#ifdef HAVE_MPI
MPI_Init(&argc,&argv);
#endif
try {
Init();
int NumGlobalElements = 10000;
Space S(NumGlobalElements);
Teuchos::ParameterList MLList;
MLList.set("max levels",3);
MLList.set("aggregation: type", "Uncoupled");
MLList.set("aggregation: damping factor", 1.333);
MLList.set("smoother: type","symmetric Gauss-Seidel");
MLList.set("smoother: sweeps",1);
MLList.set("smoother: damping factor",1.0);
MLList.set("coarse: max size",3);
MLList.set("coarse: type","Amesos-KLU");
x_ex.Random();
b = A * x_ex;
x = 0.0;
double OldNorm = 1.0;
double Tolerance = 1e-13;
int MaxIters = 30;
for (int i = 0 ; i < MaxIters ; ++i) {
r = b - A * x;
z = P * r;
x = x + z;
double NewNorm = sqrt((x - x_ex) * (A * (x - x_ex)));
if (GetMyPID() == 0 && i) {
std::cout << "||x - x_ex||_A = ";
std::cout.width(15);
std::cout << NewNorm << ", ";
std::cout << "reduction = ";
std::cout.width(15);
std::cout << NewNorm / OldNorm << std::endl;
}
if (NewNorm < Tolerance)
break;
OldNorm = NewNorm;
}
}
catch (const int e) {
std::cout << "Caught integer exception, code = " << e << std::endl;
}
catch (...) {
std::cout << "problems here..." << std::endl;
}
#ifdef HAVE_MPI
MPI_Finalize();
#endif
return(0);
}
#else
#include "ml_include.h"
int main(int argc, char *argv[])
{
#ifdef HAVE_MPI
MPI_Init(&argc,&argv);
#endif
puts("This MLAPI example requires the following configuration options:");
puts("\t--enable-epetra");
puts("\t--enable-teuchos");
puts("\t--enable-ifpack");
puts("\t--enable-amesos");
puts("\t--enable-galeri");
puts("Please check your configure line.");
#ifdef HAVE_MPI
MPI_Finalize();
#endif
return(0);
}
#endif
Overloaded operators for MultiVector's, Operator's, and InverseOpereator's.
MLAPI interface to the Galeri package.
Standard smoothed aggregation multilevel preconditioner.
MLAPI wrapper for double vectors.
Basic class to define operators within MLAPI.
Class to specify the number and distribution among processes of elements.
Black-box multilevel smoothed aggregation preconditioner.
Definition: MLAPI_MultiLevelSA.h:47
Basic class for distributed double-precision vectors.
Definition: MLAPI_MultiVector.h:103
Operator: basic class to define operators within MLAPI.
Definition: MLAPI_Operator.h:44
Specifies the number and distribution among processes of elements.
Definition: MLAPI_Space.h:40
MLAPI: Default namespace for all MLAPI objects and functions.
Definition: MLAPI_Aggregation.h:24
void Finalize()
Destroys the MLAPI workspace.