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WilsonMG: Make number of levels chooseable at runtime

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I don't like this solution though :(
This commit is contained in:
Daniel Richtmann
2018-04-03 15:57:33 +02:00
parent 2530bfed01
commit ff6413a764
1 changed files with 47 additions and 43 deletions
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90
tests/solver/Test_wilsonclover_mg.cc
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@@ -151,8 +151,16 @@ public:
}
};
template<class Field> class MultiGridPreconditionerBase : public LinearFunction<Field> {
public:
virtual ~MultiGridPreconditionerBase() = default;
virtual void setup() = 0;
virtual void operator()(Field const &in, Field &out) = 0;
virtual void runChecks() = 0;
};
template<class Fobj, class CoarseScalar, int nCoarseSpins, int nBasis, int nCoarserLevels, class Matrix>
class MultiGridPreconditioner : public LinearFunction<Lattice<Fobj>> {
class MultiGridPreconditioner : public MultiGridPreconditionerBase<Lattice<Fobj>> {
public:
/////////////////////////////////////////////
// Type Definitions
@@ -213,10 +221,10 @@ public:
static_assert((nBasis & 0x1) == 0, "MG Preconditioner only supports an even number of basis vectors");
int nb = nBasis / 2;
// TODO: to get this to work for more than two levels, I would need to either implement coarse spins or have a template specialization of this class also for the finest level
for(int n = 0; n < nb; n++) {
_Aggregates.subspace[n + nb] = g5 * _Aggregates.subspace[n];
}
// // TODO: to get this to work for more than two levels, I would need to either implement coarse spins or have a template specialization of this class also for the finest level
// for(int n = 0; n < nb; n++) {
// _Aggregates.subspace[n + nb] = g5 * _Aggregates.subspace[n];
// }
_CoarseMatrix.CoarsenOperator(_LevelInfo.Grids[_CurrentLevel], fineMdagMOp, _Aggregates);
@@ -473,7 +481,7 @@ public:
// Specialization for the coarsest level
template<class Fobj, class CoarseScalar, int nCoarseSpins, int nbasis, class Matrix>
class MultiGridPreconditioner<Fobj, CoarseScalar, nCoarseSpins, nbasis, 0, Matrix> : public LinearFunction<Lattice<Fobj>> {
class MultiGridPreconditioner<Fobj, CoarseScalar, nCoarseSpins, nbasis, 0, Matrix> : public MultiGridPreconditionerBase<Lattice<Fobj>> {
public:
/////////////////////////////////////////////
// Type Definitions
@@ -528,6 +536,29 @@ public:
template<class Fobj, class CoarseScalar, int nCoarseSpins, int nbasis, int nLevels, class Matrix>
using NLevelMGPreconditioner = MultiGridPreconditioner<Fobj, CoarseScalar, nCoarseSpins, nbasis, nLevels - 1, Matrix>;
template<class Fobj, class CoarseScalar, int nCoarseSpins, int nbasis, class Matrix>
std::unique_ptr<MultiGridPreconditionerBase<Lattice<Fobj>>>
createMGInstance(MultiGridParams &mgParams, LevelInfo &levelInfo, Matrix &FineMat, Matrix &SmootherMat) {
// clang-format off
#define CASE_FOR_N_LEVELS(nLevels) \
case nLevels: \
return std::unique_ptr<NLevelMGPreconditioner<Fobj, CoarseScalar, nCoarseSpins, nbasis, nLevels, Matrix>>( \
new NLevelMGPreconditioner<Fobj, CoarseScalar, nCoarseSpins, nbasis, nLevels, Matrix>(mgParams, levelInfo, FineMat, SmootherMat)); \
break;
// clang-format on
switch(mgParams.nLevels) {
CASE_FOR_N_LEVELS(2);
CASE_FOR_N_LEVELS(3);
CASE_FOR_N_LEVELS(4);
default:
std::cout << GridLogError << "We currently only support nLevels ∈ {2, 3, 4}" << std::endl;
exit(EXIT_FAILURE);
break;
}
}
int main(int argc, char **argv) {
Grid_init(&argc, &argv);
@@ -619,29 +650,16 @@ int main(int argc, char **argv) {
std::cout << GridLogMessage << "Testing Multigrid for Wilson" << std::endl;
std::cout << GridLogMessage << "**************************************************" << std::endl;
TrivialPrecon<LatticeFermion> TrivialPrecon;
NLevelMGPreconditioner<vSpinColourVector, vTComplex, 1, nbasis, 2, WilsonFermionR> TwoLevelMGPreconDw(mgParams, levelInfo, Dw, Dw);
// NLevelMGPreconditioner<vSpinColourVector, vTComplex, 1, nbasis, 3, WilsonFermionR> ThreeLevelMGPreconDw(mgParams, levelInfo, Dw, Dw);
// NLevelMGPreconditioner<vSpinColourVector, vTComplex, 1, nbasis, 4, WilsonFermionR> FourLevelMGPreconDw(mgParams, levelInfo, Dw, Dw);
TrivialPrecon<LatticeFermion> TrivialPrecon;
auto MGPreconDw = createMGInstance<vSpinColourVector, vTComplex, 1, nbasis, WilsonFermionR>(mgParams, levelInfo, Dw, Dw);
TwoLevelMGPreconDw.setup();
TwoLevelMGPreconDw.runChecks();
// ThreeLevelMGPreconDw.setup();
// ThreeLevelMGPreconDw.runChecks();
// FourLevelMGPreconDw.setup();
// FourLevelMGPreconDw.runChecks();
// NLevelMGPreconDw.setup();
// NLevelMGPreconDw.runChecks();
MGPreconDw->setup();
MGPreconDw->runChecks();
std::vector<std::unique_ptr<OperatorFunction<LatticeFermion>>> solversDw;
solversDw.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, TrivialPrecon, 100, false));
solversDw.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, TwoLevelMGPreconDw, 100, false));
// solversDw.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, ThreeLevelMGPreconDw, 100, false));
// solversDw.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, FourLevelMGPreconDw, 100, false));
solversDw.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, *MGPreconDw, 100, false));
for(auto const &solver : solversDw) {
std::cout << "Starting with a new solver" << std::endl;
@@ -654,32 +672,18 @@ int main(int argc, char **argv) {
std::cout << GridLogMessage << "Testing Multigrid for Wilson Clover" << std::endl;
std::cout << GridLogMessage << "**************************************************" << std::endl;
NLevelMGPreconditioner<vSpinColourVector, vTComplex, 1, nbasis, 2, WilsonCloverFermionR> TwoLevelMGPreconDwc(
mgParams, levelInfo, Dwc, Dwc);
// NLevelMGPreconditioner<vSpinColourVector, vTComplex, 1, nbasis, 3, WilsonCloverFermionR> ThreeLevelMGPreconDwc(mgParams, velInfo, Dwc, Dwc);
// NLevelMGPreconditioner<vSpinColourVector, vTComplex, 1, nbasis, 4, WilsonCloverFermionR> FourLevelMGPreconDwc(lelevelInfo, Dwc, Dwc);
auto MGPreconDwc = createMGInstance<vSpinColourVector, vTComplex, 1, nbasis, WilsonCloverFermionR>(mgParams, levelInfo, Dwc, Dwc);
TwoLevelMGPreconDwc.setup();
TwoLevelMGPreconDwc.runChecks();
// ThreeLevelMGPreconDwc.setup();
// ThreeLevelMGPreconDwc.runChecks();
// FourLevelMGPreconDwc.setup();
// FourLevelMGPreconDwc.runChecks();
// NLevelMGPreconDwc.setup();
// NLevelMGPreconDwc.runChecks();
MGPreconDwc->setup();
MGPreconDwc->runChecks();
std::vector<std::unique_ptr<OperatorFunction<LatticeFermion>>> solversDwc;
solversDwc.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, TrivialPrecon, 100, false));
solversDwc.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, TwoLevelMGPreconDwc, 100, false));
// solversDwc.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, ThreeLevelMGPreconDwc, 100, false));
// solversDwc.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, FourLevelMGPreconDwc, 100, false));
solversDwc.emplace_back(new FlexibleGeneralisedMinimalResidual<LatticeFermion>(1.0e-12, 50000, *MGPreconDwc, 100, false));
for(auto const &solver : solversDwc) {
std::cout << "Starting with a new solver" << std::endl;
std::cout << std::endl << "Starting with a new solver" << std::endl;
result = zero;
(*solver)(MdagMOpDwc, src, result);
std::cout << std::endl;