Go to the documentation of this file.
3 #ifndef DUNE_ISTL_TWOLEVELMETHOD_HH
4 #define DUNE_ISTL_TWOLEVELMETHOD_HH
13 #include<dune/common/unused.hh>
36 template<
class FO,
class CO>
140 template<
class O,
class C>
156 prolongDamp_ = criterion_.getProlongationDampingFactor();
163 typedef NegateSet<typename ParallelInformation::OwnerSet> OverlapFlags;
165 aggregatesMap_ = std::make_shared<AggregatesMap>(pg.
maxVertex()+1);
167 int noAggregates, isoAggregates, oneAggregates, skippedAggregates;
169 std::tie(noAggregates, isoAggregates, oneAggregates, skippedAggregates) =
170 aggregatesMap_->buildAggregates(fineOperator.getmat(), pg, criterion_,
true);
171 std::cout<<
"no aggregates="<<noAggregates<<
" iso="<<isoAggregates<<
" one="<<oneAggregates<<
" skipped="<<skippedAggregates<<std::endl;
174 typedef std::vector<bool>::iterator Iterator;
175 typedef Dune::IteratorPropertyMap<Iterator, Dune::IdentityMap> VisitedMap;
176 std::vector<bool> excluded(fineOperator.getmat().N(),
false);
177 VisitedMap vm(excluded.begin(), Dune::IdentityMap());
179 std::size_t aggregates = renumberer.coarsen(pinfo, pg, vm,
180 *aggregatesMap_, pinfo,
182 std::vector<bool>& visited=excluded;
184 typedef std::vector<bool>::iterator Iterator;
186 for(Iterator iter= visited.begin(), end=visited.end();
189 matrix_.reset(productBuilder.
build(mg, vm,
194 productBuilder.
calculate(fineOperator.getmat(), *aggregatesMap_, *matrix_, pinfo, OverlapFlags());
195 this->
lhs_.resize(this->matrix_->M());
196 this->
rhs_.resize(this->matrix_->N());
197 this->
operator_ = std::make_shared<O>(*matrix_);
220 typename O::matrix_type::field_type prolongDamp_;
221 std::shared_ptr<AggregatesMap> aggregatesMap_;
223 std::shared_ptr<typename O::matrix_type> matrix_;
232 template<
class O,
class S,
class C>
239 typedef typename O::range_type
X;
254 : smootherArgs_(args), criterion_(c)
258 : coarseOperator_(other.coarseOperator_), smootherArgs_(other.smootherArgs_),
259 criterion_(other.criterion_)
273 : amg_(op, crit,args), first_(true)
278 DUNE_UNUSED_PARAMETER(reduction);
279 DUNE_UNUSED_PARAMETER(res);
289 void apply(
X& x,
X& b, InverseOperatorResult& res)
291 return apply(x,b,1e-8,res);
297 return amg_.category();
300 ~AMGInverseOperator()
305 AMGInverseOperator(
const AMGInverseOperator& other)
306 : x_(other.x_), amg_(other.amg_), first_(other.first_)
329 coarseOperator_=transferPolicy.getCoarseLevelOperator();
330 AMGInverseOperator* inv =
new AMGInverseOperator(*coarseOperator_,
340 std::shared_ptr<Operator> coarseOperator_;
352 template<
class FO,
class CSP,
class S>
354 public Preconditioner<typename FO::domain_type, typename FO::range_type>
407 std::shared_ptr<SmootherType> smoother,
411 std::size_t preSteps=1, std::size_t postSteps=1)
412 : operator_(&op), smoother_(smoother),
413 preSteps_(preSteps), postSteps_(postSteps)
415 policy_ = policy.
clone();
417 coarseSolver_=coarsePolicy.createCoarseLevelSolver(*policy_);
421 : operator_(other.operator_), coarseSolver_(new
CoarseLevelSolver(*other.coarseSolver_)),
422 smoother_(other.smoother_), policy_(other.policy_->clone()),
423 preSteps_(other.preSteps_), postSteps_(other.postSteps_)
430 delete coarseSolver_;
440 DUNE_UNUSED_PARAMETER(x);
447 LevelContext context;
452 context.smoother=smoother_;
454 context.matrix=operator_;
463 *context.update += *context.lhs;
484 std::shared_ptr<SmootherType> smoother;
512 std::shared_ptr<S> smoother_;
514 LevelTransferPolicy<FO,typename CSP::Operator>* policy_;
516 std::size_t preSteps_;
518 std::size_t postSteps_;
std::shared_ptr< CoarseOperatorType > operator_
the coarse level linear operator.
Definition: twolevelmethod.hh:132
static void restrictVector(const AggregatesMap< Vertex > &aggregates, Vector &coarse, const Vector &fine, T &comm)
CSP CoarseLevelSolverPolicy
The type of the policy for constructing the coarse level solver.
Definition: twolevelmethod.hh:358
FineOperatorType::range_type FineRangeType
The type of the range of the fine level operator.
Definition: twolevelmethod.hh:369
void post(FineDomainType &x)
Definition: twolevelmethod.hh:438
G::MutableMatrix * build(G &fineGraph, V &visitedMap, const ParallelInformation &pinfo, AggregatesMap< typename G::VertexDescriptor > &aggregates, const typename G::Matrix::size_type &size, const Set ©)
Calculates the coarse matrix via a Galerkin product.
Definition: galerkin.hh:564
void moveToFineLevel(typename FatherType::FineDomainType &fineLhs)
Updates the fine level linear system after the correction of the coarse levels system.
Definition: twolevelmethod.hh:207
@ sequential
Category for sequential solvers.
Definition: solvercategory.hh:23
CoarseOperatorType::domain_type CoarseDomainType
The type of the domain of the coarse level operator.
Definition: twolevelmethod.hh:65
void calculate(const M &fine, const AggregatesMap< V > &aggregates, M &coarse, const I &pinfo, const O ©)
Calculate the galerkin product.
VertexDescriptor maxVertex() const
Get the maximal vertex descriptor.
FineOperatorType::range_type FineRangeType
The type of the range of the fine level operator.
Definition: twolevelmethod.hh:48
S SmootherType
The type of the fine level smoother.
Definition: twolevelmethod.hh:390
SequentialInformation ParallelInformation
Definition: twolevelmethod.hh:148
~TwoLevelMethod()
Definition: twolevelmethod.hh:426
Provides a class for building the galerkin product based on a aggregation scheme.
C Criterion
Definition: twolevelmethod.hh:147
LevelTransferPolicy< O, O > FatherType
Definition: twolevelmethod.hh:146
virtual SolverCategory::Category category() const
Category of the preconditioner (see SolverCategory::Category)
Definition: twolevelmethod.hh:470
O::range_type X
The type of the range and domain of the operator.
Definition: twolevelmethod.hh:239
Class representing a node in the matrix graph.
Definition: dependency.hh:125
virtual LevelTransferPolicy * clone() const =0
Clone the current object.
S Smoother
The type of the smoother used in AMG.
Definition: twolevelmethod.hh:243
Abstract base class for all solvers.
Definition: solver.hh:97
CoarseRangeType rhs_
The coarse level rhs.
Definition: twolevelmethod.hh:128
virtual void moveToCoarseLevel(const FineRangeType &fineRhs)=0
Transfers the data to the coarse level.
A policy class for solving the coarse level system using one step of AMG.
Definition: twolevelmethod.hh:233
void createCoarseLevelSystem(const O &fineOperator)
Algebraically creates the coarse level system.
Definition: twolevelmethod.hh:154
AggregationLevelTransferPolicy(const Criterion &crit)
Definition: twolevelmethod.hh:150
FO FineOperatorType
The linear operator of the finel level system. Has to be derived from AssembledLinearOperator.
Definition: twolevelmethod.hh:44
FineOperatorType::domain_type FineDomainType
The type of the domain of the fine level operator.
Definition: twolevelmethod.hh:373
O Operator
The type of the linear operator used.
Definition: twolevelmethod.hh:237
virtual void createCoarseLevelSystem(const FineOperatorType &fineOperator)=0
Algebraically creates the coarse level system.
void moveToCoarseLevel(const typename FatherType::FineRangeType &fineRhs)
Definition: twolevelmethod.hh:200
FineOperatorType::domain_type FineDomainType
The type of the domain of the fine level operator.
Definition: twolevelmethod.hh:52
Dune::Amg::SmootherTraits< S >::Arguments SmootherArgs
The type of the arguments used for constructing the smoother.
Definition: twolevelmethod.hh:245
static void prolongateVector(const AggregatesMap< Vertex > &aggregates, Vector &coarse, Vector &fine, Vector &fineRedist, T1 damp, R &redistributor=R())
Define general, extensible interface for inverse operators.
Statistics about the application of an inverse operator.
Definition: solver.hh:45
OneStepAMGCoarseSolverPolicy(const OneStepAMGCoarseSolverPolicy &other)
Copy constructor.
Definition: twolevelmethod.hh:257
void pre(FineDomainType &x, FineRangeType &b)
Definition: twolevelmethod.hh:433
AggregationLevelTransferPolicy * clone() const
Definition: twolevelmethod.hh:214
virtual void moveToFineLevel(FineDomainType &fineLhs)=0
Updates the fine level linear system after the correction of the coarse levels system.
OneStepAMGCoarseSolverPolicy(const SmootherArgs &args, const Criterion &c)
Constructs the coarse solver policy.
Definition: twolevelmethod.hh:253
C Criterion
The type of the crition used for the aggregation within AMG.
Definition: twolevelmethod.hh:241
AMGInverseOperator CoarseLevelSolver
The type of solver constructed for the coarse level.
Definition: twolevelmethod.hh:317
CoarseDomainType & getCoarseLevelLhs()
Get the coarse level left hand side.
Definition: twolevelmethod.hh:87
FO FineOperatorType
The linear operator of the finel level system. Has to be derived from AssembledLinearOperator.
Definition: twolevelmethod.hh:365
CoarseRangeType & getCoarseLevelRhs()
Get the coarse level right hand side.
Definition: twolevelmethod.hh:78
std::shared_ptr< CoarseOperatorType > & getCoarseLevelOperator()
Get the coarse level operator.
Definition: twolevelmethod.hh:70
CoarseLevelSolver * createCoarseLevelSolver(P &transferPolicy)
Constructs a coarse level solver.
Definition: twolevelmethod.hh:327
Abstract base class for transfer between levels and creation of the coarse level system.
Definition: twolevelmethod.hh:37
Definition: indicescoarsener.hh:34
Definition: allocator.hh:7
Class providing information about the mapping of the vertices onto aggregates.
Definition: aggregates.hh:555
void postsmooth(LevelContext &levelContext, size_t steps)
Apply post smoothing on the current level.
Definition: smoother.hh:490
virtual ~LevelTransferPolicy()
Destructor.
Definition: twolevelmethod.hh:124
void apply(FineDomainType &v, const FineRangeType &d)
Definition: twolevelmethod.hh:443
void presmooth(LevelContext &levelContext, size_t steps)
Apply pre smoothing on the current level.
Definition: smoother.hh:468
AMG< Operator, X, Smoother > AMGType
The type of the AMG construct on the coarse level.
Definition: twolevelmethod.hh:247
CoarseOperatorType::range_type CoarseRangeType
The type of the range of the coarse level operator.
Definition: twolevelmethod.hh:382
CoarseDomainType lhs_
The coarse level lhs.
Definition: twolevelmethod.hh:130
CO CoarseOperatorType
The linear operator of the finel level system. Has to be derived from AssembledLinearOperator.
Definition: twolevelmethod.hh:57
TwoLevelMethod(const FineOperatorType &op, std::shared_ptr< SmootherType > smoother, const LevelTransferPolicy< FineOperatorType, CoarseOperatorType > &policy, CoarseLevelSolverPolicy &coarsePolicy, std::size_t preSteps=1, std::size_t postSteps=1)
Constructs a two level method.
Definition: twolevelmethod.hh:406
Definition: galerkin.hh:115
SmootherTraits< Smoother >::Arguments SmootherArgs
The argument type for the construction of the smoother.
Definition: amg.hh:97
virtual void apply(X &x, X &b, InverseOperatorResult &res)=0
Apply inverse operator,.
virtual SolverCategory::Category category() const=0
Category of the solver (see SolverCategory::Category)
Class representing the properties of an ede in the matrix graph.
Definition: dependency.hh:37
Base class for matrix free definition of preconditioners.
Definition: preconditioner.hh:30
CoarseOperatorType::range_type CoarseRangeType
The type of the range of the coarse level operator.
Definition: twolevelmethod.hh:61
The (undirected) graph of a matrix.
Definition: graph.hh:48
The default class for the smoother arguments.
Definition: smoother.hh:36
Attaches properties to the edges and vertices of a graph.
Definition: graph.hh:975
TwoLevelMethod(const TwoLevelMethod &other)
Definition: twolevelmethod.hh:420
Category
Definition: solvercategory.hh:21
Operator Operator
The matrix operator type.
Definition: amg.hh:70
Definition: twolevelmethod.hh:353
A LeveTransferPolicy that used aggregation to construct the coarse level system.
Definition: twolevelmethod.hh:141
CoarseLevelSolverPolicy::CoarseLevelSolver CoarseLevelSolver
The type of the coarse level solver.
Definition: twolevelmethod.hh:360
CSP::Operator CoarseOperatorType
The linear operator of the finel level system. Has to be derived from AssembledLinearOperator.
Definition: twolevelmethod.hh:378
CoarseOperatorType::domain_type CoarseDomainType
The type of the domain of the coarse level operator.
Definition: twolevelmethod.hh:386
Define general, extensible interface for operators. The available implementation wraps a matrix.