/// Solve the linear system Ax = b, with A being the
    /// combined derivative matrix of the residual and b
    /// being the residual itself.
    /// \param[in] residual   residual object containing A and b.
    /// \return               the solution x
    NewtonIterationBlackoilSimple::SolutionVector
    NewtonIterationBlackoilSimple::computeNewtonIncrement(const LinearisedBlackoilResidual& residual) const
    {
        typedef LinearisedBlackoilResidual::ADB ADB;
        const int np = residual.material_balance_eq.size();
        ADB mass_res = residual.material_balance_eq[0];
        for (int phase = 1; phase < np; ++phase) {
            mass_res = vertcat(mass_res, residual.material_balance_eq[phase]);
        }
        const ADB well_res = vertcat(residual.well_flux_eq, residual.well_eq);
        const ADB total_residual = collapseJacs(vertcat(mass_res, well_res));

        Eigen::SparseMatrix<double, Eigen::RowMajor> matr;
        total_residual.derivative()[0].toSparse(matr);

        SolutionVector dx(SolutionVector::Zero(total_residual.size()));
        Opm::LinearSolverInterface::LinearSolverReport rep
            = linsolver_->solve(matr.rows(), matr.nonZeros(),
                                matr.outerIndexPtr(), matr.innerIndexPtr(), matr.valuePtr(),
                                total_residual.value().data(), dx.data(), parallelInformation_);

        // store iterations
        iterations_ = rep.iterations;

        if (!rep.converged) {
            OPM_THROW(LinearSolverProblem,
                      "FullyImplicitBlackoilSolver::solveJacobianSystem(): "
                      "Linear solver convergence failure.");
        }
        return dx;
    }
ColCompressedMatrix convert_from_Eigen(const Eigen::SparseMatrix<double> &m)
{
	assert(m.rows() == m.cols());
	assert(m.isCompressed());
	return ColCompressedMatrix(m.rows, m.nonZeros(), 
		m.valuePtr(), m.outerIndexPtr(), m.innerIndexPtr());
}
Example #3
0
CollOfScalar EquelleRuntimeCPU::solveForUpdate(const CollOfScalar& residual) const
{
    Eigen::SparseMatrix<double, Eigen::RowMajor> matr = residual.derivative()[0];

    CollOfScalar::V du = CollOfScalar::V::Zero(residual.size());

    Opm::time::StopWatch clock;
    clock.start();

    // solve(n, # nonzero values ("val"), ptr to col indices
    // ("col_ind"), ptr to row locations in val array ("row_ind")
    // (these two may be swapped, not sure about the naming convention
    // here...), array of actual values ("val") (I guess... '*sa'...),
    // rhs, solution)
    Opm::LinearSolverInterface::LinearSolverReport rep
        = linsolver_.solve(matr.rows(), matr.nonZeros(),
                           matr.outerIndexPtr(), matr.innerIndexPtr(), matr.valuePtr(),
                           residual.value().data(), du.data());

    if (verbose_ > 2) {
        std::cout << "        solveForUpdate: Linear solver took: " << clock.secsSinceLast() << " seconds." << std::endl;
    }
    if (!rep.converged) {
        OPM_THROW(std::runtime_error, "Linear solver convergence failure.");
    }
    return du;
}
ConvertToMklResult to_mkl(const Eigen::SparseMatrix<double> &Ain,
                          sparse_status_t &status) {
  ConvertToMklResult result;

  const int N = static_cast<int>(Ain.rows());
  // const-cast to work with C-api.
  int *row_starts = const_cast<int *>(Ain.outerIndexPtr());
  int *col_index = const_cast<int *>(Ain.innerIndexPtr());
  double *values = const_cast<double *>(Ain.valuePtr());

  result.descr.type = SPARSE_MATRIX_TYPE_GENERAL; /* Full matrix is stored */

  result.status =
      mkl_sparse_d_create_csr(&result.matrix, SPARSE_INDEX_BASE_ZERO, N, N,
                              row_starts, row_starts + 1, col_index, values);
  return result;
}