ConvergenceCriterionResidual.cpp

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#include "ConvergenceCriterionResidual.h"
 
#include "BaseLib/ConfigTree.h"
#include "BaseLib/Logging.h"
#include "MathLib/LinAlg/LinAlg.h"
 
namespace NumLib
{
ConvergenceCriterionResidual::ConvergenceCriterionResidual(
    std::optional<double>&& absolute_tolerance,
    std::optional<double>&& relative_tolerance,
    const MathLib::VecNormType norm_type)
    : ConvergenceCriterion(norm_type),
      _abstol(std::move(absolute_tolerance)),
      _reltol(std::move(relative_tolerance))
{
    if ((!_abstol) && (!_reltol))
    {
        OGS_FATAL(
            "At least one of absolute or relative tolerance has to be "
            "specified.");
    }
}
 
void ConvergenceCriterionResidual::checkDeltaX(
    const GlobalVector& minus_delta_x, GlobalVector const& x)
{
    auto error_dx = MathLib::LinAlg::norm(minus_delta_x, _norm_type);
    auto norm_x = MathLib::LinAlg::norm(x, _norm_type);
 
    INFO("Convergence criterion: |dx|={:.4e}, |x|={:.4e}, |dx|/|x|={:.4e}",
         error_dx, norm_x,
         (norm_x == 0. ? std::numeric_limits<double>::quiet_NaN()
                       : (error_dx / norm_x)));
}
 
void ConvergenceCriterionResidual::checkResidual(const GlobalVector& residual)
{
    auto norm_res = MathLib::LinAlg::norm(residual, _norm_type);
 
    if (_is_first_iteration)
    {
        INFO("Convergence criterion: |r0|={:.4e}", norm_res);
        _residual_norm_0 = norm_res;
    }
    else
    {
        _residual_norm_0 =
            (_residual_norm_0 < std::numeric_limits<double>::epsilon())
                ? norm_res
                : _residual_norm_0;
        if (_residual_norm_0 < std::numeric_limits<double>::epsilon())
        {
            INFO("Convergence criterion: |r|={:.4e} |r0|={:.4e}", norm_res,
                 _residual_norm_0);
        }
        else
        {
            INFO(
                "Convergence criterion: |r|={:.4e} |r0|={:.4e} |r|/|r0|={:.4e}",
                norm_res, _residual_norm_0,
                (_residual_norm_0 == 0.
                     ? std::numeric_limits<double>::quiet_NaN()
                     : (norm_res / _residual_norm_0)));
        }
    }
 
    bool satisfied_abs = false;
    bool satisfied_rel = false;
 
    if (_abstol)
    {
        satisfied_abs = norm_res < *_abstol;
    }
    if (_reltol && !_is_first_iteration)
    {
        satisfied_rel =
            checkRelativeTolerance(*_reltol, norm_res, _residual_norm_0);
    }
 
    _satisfied = _satisfied && (satisfied_abs || satisfied_rel);
}
 
std::unique_ptr<ConvergenceCriterionResidual>
createConvergenceCriterionResidual(const BaseLib::ConfigTree& config)
{
    config.checkConfigParameter("type", "Residual");
 
    auto abstol = config.getConfigParameterOptional<double>("abstol");
    auto reltol = config.getConfigParameterOptional<double>("reltol");
    auto const norm_type_str =
        config.getConfigParameter<std::string>("norm_type");
    auto const norm_type = MathLib::convertStringToVecNormType(norm_type_str);
 
    if (norm_type == MathLib::VecNormType::INVALID)
    {
        OGS_FATAL("Unknown vector norm type `{:s}'.", norm_type_str);
    }
 
    return std::make_unique<ConvergenceCriterionResidual>(
        std::move(abstol), std::move(reltol), norm_type);
}
 
}  // namespace NumLib