5#ifndef DUNE_AMG_PARAMETERS_HH
6#define DUNE_AMG_PARAMETERS_HH
35 : alpha_(1.0/3.0), beta_(1.0E-5)
96 : maxDistance_(2), minAggregateSize_(4), maxAggregateSize_(6),
97 connectivity_(15), skipiso_(false)
111 maxDistance_=diameter-1;
114 for(; dim>0; dim--) {
116 maxDistance_+=diameter-1;
118 minAggregateSize_=csize;
119 maxAggregateSize_=
static_cast<std::size_t
>(csize*1.5);
223 std::size_t maxDistance_, minAggregateSize_, maxAggregateSize_, connectivity_;
280 coarsenTarget_ = nodes;
288 return coarsenTarget_;
298 minCoarsenRate_ = rate;
306 return minCoarsenRate_;
344 return dampingFactor_;
359 dampingFactor_(prolongDamp), accumulate_(
accumulate)
374 double minCoarsenRate_;
378 double dampingFactor_;
422 preSmoothSteps_=steps;
430 return preSmoothSteps_;
439 postSmoothSteps_=steps;
447 return postSmoothSteps_;
496 , debugLevel_(2), preSmoothSteps_(2), postSmoothSteps_(2), gamma_(1),
501 std::size_t preSmoothSteps_;
502 std::size_t postSmoothSteps_;
void setDefaultValuesAnisotropic(std::size_t dim, std::size_t diameter=2)
Sets reasonable default values for an anisotropic problem.
Definition: parameters.hh:132
void setAdditive(bool additive)
Set whether to use additive multigrid.
Definition: parameters.hh:469
void setSkipIsolated(bool skip)
Set whether isolated aggregates will not be represented on the coarse level.
Definition: parameters.hh:171
void setProlongationDampingFactor(double d)
Set the damping factor for the prolongation.
Definition: parameters.hh:332
double alpha() const
Get the scaling value for marking connections as strong. Default value is 1/3.
Definition: parameters.hh:70
void setMaxAggregateSize(std::size_t size)
Set the maximum number of nodes a aggregate is allowed to have.
Definition: parameters.hh:202
void setMinCoarsenRate(double rate)
Set the minimum coarsening rate to be achieved in each coarsening.
Definition: parameters.hh:296
double minCoarsenRate() const
Get the minimum coarsening rate to be achieved.
Definition: parameters.hh:304
std::size_t maxAggregateSize() const
Get the maximum number of nodes a aggregate is allowed to have.
Definition: parameters.hh:194
void setAlpha(double a)
Set the scaling value for marking connections as strong. Default value is 1/3.
Definition: parameters.hh:61
double beta() const
Get the threshold for marking nodes as isolated. The default value is 1.0E-5.
Definition: parameters.hh:52
std::size_t maxConnectivity() const
Get the maximum number of connections a aggregate is allowed to have.
Definition: parameters.hh:211
int coarsenTarget() const
Get the maximum number of unknowns allowed on the coarsest level.
Definition: parameters.hh:286
void setAccumulate(AccumulationMode accu)
Set whether he data should be accumulated on fewer processes on coarser levels.
Definition: parameters.hh:319
double getProlongationDampingFactor() const
Get the damping factor for the prolongation.
Definition: parameters.hh:342
AccumulationMode accumulate() const
Whether the data should be accumulated on fewer processes on coarser levels.
Definition: parameters.hh:312
void setMaxConnectivity(std::size_t connectivity)
Set the maximum number of connections a aggregate is allowed to have.
Definition: parameters.hh:220
std::size_t minAggregateSize() const
Get the minimum number of nodes a aggregate has to consist of.
Definition: parameters.hh:180
bool getAdditive() const
Get whether to use additive multigrid.
Definition: parameters.hh:478
void setMaxLevel(int l)
Set the maximum number of levels allowed in the hierarchy.
Definition: parameters.hh:263
void setDebugLevel(int level)
Set the debugging level.
Definition: parameters.hh:401
std::size_t getGamma() const
Get the value of gamma; 1 for V-cycle, 2 for W-cycle.
Definition: parameters.hh:460
void setNoPostSmoothSteps(std::size_t steps)
Set the number of postsmoothing steps to apply.
Definition: parameters.hh:437
std::size_t getNoPreSmoothSteps() const
Get the number of presmoothing steps to apply.
Definition: parameters.hh:428
DependencyParameters()
Constructor.
Definition: parameters.hh:34
void setMinAggregateSize(std::size_t size)
Set the minimum number of nodes a aggregate has to consist of.
Definition: parameters.hh:188
int maxLevel() const
Get the maximum number of levels allowed in the hierarchy.
Definition: parameters.hh:270
void setDefaultValuesIsotropic(std::size_t dim, std::size_t diameter=2)
Sets reasonable default values for an isotropic problem.
Definition: parameters.hh:109
AggregationParameters()
Constructor.
Definition: parameters.hh:95
bool skipIsolated() const
Whether isolated aggregates will not be represented on the coarse level.
Definition: parameters.hh:161
Parameters(int maxLevel=100, int coarsenTarget=1000, double minCoarsenRate=1.2, double prolongDamp=1.6, AccumulationMode accumulate=successiveAccu)
Constructor.
Definition: parameters.hh:493
void setCoarsenTarget(int nodes)
Set the maximum number of unknowns allowed on the coarsest level.
Definition: parameters.hh:278
void setNoPreSmoothSteps(std::size_t steps)
Set the number of presmoothing steps to apply.
Definition: parameters.hh:420
AccumulationMode
Identifiers for the different accumulation modes.
Definition: parameters.hh:232
void setBeta(double b)
Set threshold for marking nodes as isolated. The default value is 1.0E-5.
Definition: parameters.hh:42
std::size_t maxDistance() const
Get the maximal distance allowed between two nodes in a aggregate.
Definition: parameters.hh:144
CoarseningParameters(int maxLevel=100, int coarsenTarget=1000, double minCoarsenRate=1.2, double prolongDamp=1.6, AccumulationMode accumulate=successiveAccu)
Constructor.
Definition: parameters.hh:356
void setGamma(std::size_t gamma)
Set the value of gamma; 1 for V-cycle, 2 for W-cycle.
Definition: parameters.hh:453
void setAccumulate(bool accu)
Definition: parameters.hh:324
void setMaxDistance(std::size_t distance)
Set the maximal distance allowed between two nodes in a aggregate.
Definition: parameters.hh:154
int debugLevel() const
Get the debugging Level.
Definition: parameters.hh:411
std::size_t getNoPostSmoothSteps() const
Get the number of postsmoothing steps to apply.
Definition: parameters.hh:445
@ atOnceAccu
Accumulate data to one process at once.
Definition: parameters.hh:244
@ noAccu
No data accumulution.
Definition: parameters.hh:238
@ successiveAccu
Successively accumulate to fewer processes.
Definition: parameters.hh:248
Definition: allocator.hh:11
Parameters needed to check whether a node depends on another.
Definition: parameters.hh:31
Parameters needed for the aggregation process.
Definition: parameters.hh:84
Parameters for the complete coarsening process.
Definition: parameters.hh:258
All parameters for AMG.
Definition: parameters.hh:393