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/*
Copyright 2019 SINTEF Digital, Mathematics and Cybernetics.
Copyright 2022 Equinor
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OPM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#define BOOST_TEST_MODULE OPM_test_rocalutionSolver
#include <boost/test/unit_test.hpp>
#include <opm/simulators/linalg/gpubridge/GpuBridge.hpp>
#include <opm/simulators/linalg/gpubridge/WellContributions.hpp>
#include <rocalution.hpp>
#include <dune/common/fvector.hh>
#include <dune/istl/bvector.hh>
#include <dune/istl/bcrsmatrix.hh>
#include <dune/istl/matrixmarket.hh>
#include <dune/istl/solvers.hh>
#include <dune/istl/preconditioners.hh>
#include <boost/property_tree/json_parser.hpp>
#include <boost/property_tree/ptree.hpp>
template <int bz>
using Matrix = Dune::BCRSMatrix<Dune::FieldMatrix<double, bz, bz>>;
template <int bz>
using Vector = Dune::BlockVector<Dune::FieldVector<double, bz>>;
template <int bz>
void readLinearSystem(const std::string& matrix_filename, const std::string& rhs_filename, Matrix<bz>& matrix, Vector<bz>& rhs)
{
{
std::ifstream mfile(matrix_filename);
if (!mfile) {
throw std::runtime_error("Could not read matrix file");
}
readMatrixMarket(matrix, mfile);
}
{
std::ifstream rhsfile(rhs_filename);
if (!rhsfile) {
throw std::runtime_error("Could not read rhs file");
}
readMatrixMarket(rhs, rhsfile);
}
}
template <int bz>
Dune::BlockVector<Dune::FieldVector<double, bz>>
getDuneSolution(Matrix<bz>& matrix, Vector<bz>& rhs)
{
Dune::InverseOperatorResult result;
Vector<bz> x(rhs.size());
typedef Dune::MatrixAdapter<Matrix<bz>,Vector<bz>,Vector<bz> > Operator;
Operator fop(matrix);
double relaxation = 0.9;
Dune::SeqILU<Matrix<bz>,Vector<bz>,Vector<bz> > prec(matrix, relaxation);
double reduction = 1e-2;
int maxit = 10;
int verbosity = 0;
Dune::BiCGSTABSolver<Vector<bz> > solver(fop, prec, reduction, maxit, verbosity);
solver.apply(x, rhs, result);
return x;
}
template <int bz>
Dune::BlockVector<Dune::FieldVector<double, bz>>
testRocalutionSolver(const boost::property_tree::ptree& prm, Matrix<bz>& matrix, Vector<bz>& rhs)
{
const int linear_solver_verbosity = prm.get<int>("verbosity");
const int maxit = prm.get<int>("maxiter");
const double tolerance = prm.get<double>("tol");
const bool opencl_ilu_parallel(true);
const int platformID = 0;
const int deviceID = 0;
const std::string accelerator_mode("rocalution");
const std::string linsolver("ilu0");
Dune::InverseOperatorResult result;
Vector<bz> x(rhs.size());
auto wellContribs = Opm::WellContributions<double>::create(accelerator_mode, true);
std::unique_ptr<Opm::GpuBridge<Matrix<bz>, Vector<bz>, bz> > bridge;
try {
bridge = std::make_unique<Opm::GpuBridge<Matrix<bz>, Vector<bz>, bz> >(accelerator_mode,
linear_solver_verbosity,
maxit,
tolerance,
platformID,
deviceID,
opencl_ilu_parallel,
linsolver);
} catch (const std::logic_error& error) {
BOOST_WARN_MESSAGE(true, error.what());
}
auto mat2 = matrix; // deep copy to make sure nnz values are in contiguous memory
// matrix created by readMatrixMarket() did not have contiguous memory
bridge->solve_system(&mat2, &mat2, /*numJacobiBlocks=*/0, rhs, *wellContribs, result);
bridge->get_result(x);
return x;
}
namespace pt = boost::property_tree;
void test3(const pt::ptree& prm)
{
const int bz = 3;
Matrix<bz> matrix;
Vector<bz> rhs;
readLinearSystem("matr33.txt", "rhs3.txt", matrix, rhs);
Vector<bz> rhs2 = rhs; // deep copy, getDuneSolution() changes values in rhs vector
auto duneSolution = getDuneSolution<bz>(matrix, rhs);
auto sol = testRocalutionSolver<bz>(prm, matrix, rhs2);
BOOST_REQUIRE_EQUAL(sol.size(), duneSolution.size());
for (size_t i = 0; i < sol.size(); ++i) {
for (int row = 0; row < bz; ++row) {
BOOST_CHECK_CLOSE(sol[i][row], duneSolution[i][row], 1e-3);
}
}
}
BOOST_AUTO_TEST_CASE(TestRocalutionSolver)
{
pt::ptree prm;
// Read parameters.
{
std::ifstream file("options_flexiblesolver.json");
pt::read_json(file, prm);
}
rocalution::init_rocalution();
auto rocalution_backend_descriptor = rocalution::_get_backend_descriptor();
if (rocalution_backend_descriptor->accelerator) {
// test rocalution with 3x3 blocks
test3(prm);
} else {
BOOST_ERROR("Problem with initializing a device.");
}
}
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