sgpp::pde::StdUpDown Class Reference

Implements a standard Up/Down Schema without any operation dim. More...

#include <StdUpDown.hpp>

Inheritance diagram for sgpp::pde::StdUpDown:

Public Member Functions
virtual void	mult (sgpp::base::DataVector &alpha, sgpp::base::DataVector &result)
	starts the Multiplication with the matrix More...
void	multParallelBuildingBlock (sgpp::base::DataVector &alpha, sgpp::base::DataVector &result)
	this functions provides the same functionality as the normal mult routine. More...
	StdUpDown (sgpp::base::GridStorage *storage)
	Constructor. More...
virtual	~StdUpDown ()
	Destructor. More...
Public Member Functions inherited from sgpp::base::OperationMatrix
	OperationMatrix ()
	Constructor. More...
virtual	~OperationMatrix ()
	Destructor. More...

Protected Types
typedef sgpp::base::GridStorage::grid_iterator	grid_iterator

Protected Member Functions
virtual void	down (sgpp::base::DataVector &alpha, sgpp::base::DataVector &result, size_t dim)=0
	1D down Operation More...
virtual void	up (sgpp::base::DataVector &alpha, sgpp::base::DataVector &result, size_t dim)=0
	1D up Operation More...
void	updown (sgpp::base::DataVector &alpha, sgpp::base::DataVector &result, size_t dim)
	Recursive procedure for updown. More...

Protected Attributes
const std::vector< size_t >	algoDims
	algorithmic dimensions, operator is applied in this dimensions More...
const size_t	numAlgoDims_
	number of algorithmic dimensions More...
sgpp::base::GridStorage *	storage
	Pointer to the grid's storage object. More...

Static Protected Attributes
static const size_t	maxParallelDims_ = TASKS_PARALLEL_UPDOWN
	max number of parallel stages (dimension recursive calls) More...

Detailed Description

Implements a standard Up/Down Schema without any operation dim.

Member Typedef Documentation

grid_iterator

typedef sgpp::base::GridStorage::grid_iterator sgpp::pde::StdUpDown::grid_iterator

protected

Constructor & Destructor Documentation

StdUpDown()

sgpp::pde::StdUpDown::StdUpDown ( sgpp::base::GridStorage *  storage )

explicit

Constructor.

Parameters

storage

the grid's sgpp::base::GridStorage object

~StdUpDown()

sgpp::pde::StdUpDown::~StdUpDown ( )

virtual

Destructor.

Member Function Documentation

down()

virtual void sgpp::pde::StdUpDown::down ( sgpp::base::DataVector &  alpha, sgpp::base::DataVector &  result, size_t  dim  )

protectedpure virtual

1D down Operation

Parameters

dim	dimension in which to apply the down-part
alpha	vector of coefficients
result	vector to store the results in

Implemented in sgpp::pde::OperationLTwoDotProductLinear, sgpp::pde::OperationLTwoDotProductLinearBoundary, sgpp::pde::OperationLTwoDotProductLinearStretched, and sgpp::pde::OperationLTwoDotProductLinearStretchedBoundary.

Referenced by updown().

mult()

void sgpp::pde::StdUpDown::mult ( sgpp::base::DataVector &  alpha, sgpp::base::DataVector &  result  )

virtual

starts the Multiplication with the matrix

Parameters

alpha	DataVector that contains the ansatzfunctions' coefficients
result	DataVector into which the result of the Laplace operation is stored

Implements sgpp::base::OperationMatrix.

References sgpp::base::DataVector::add(), sgpp::base::DataVector::getSize(), numAlgoDims_, sgpp::base::DataVector::setAll(), and updown().

multParallelBuildingBlock()

void sgpp::pde::StdUpDown::multParallelBuildingBlock	(	sgpp::base::DataVector &	alpha,
		sgpp::base::DataVector &	result
	)

this functions provides the same functionality as the normal mult routine.

However, it doesn't set up an OpenMP task initialization as the mult routine. This method has to be called within a OpenMP task parallelized region.

Using this function is useful in following case: Assuming the solver of a certain requires several operators in the space discretization (e.g. Black Scholes Equations) this method can be used to parallelize their calculation which might results results in a better parallel efficiency on systems with 4 or more cores hence fewer barriers are needed.

Parameters

alpha	vector of coefficients
result	vector to store the results in

References sgpp::base::DataVector::add(), sgpp::base::DataVector::getSize(), numAlgoDims_, sgpp::base::DataVector::setAll(), and updown().

up()

virtual void sgpp::pde::StdUpDown::up ( sgpp::base::DataVector &  alpha, sgpp::base::DataVector &  result, size_t  dim  )

protectedpure virtual

1D up Operation

Parameters

dim	dimension in which to apply the up-part
alpha	vector of coefficients
result	vector to store the results in

Implemented in sgpp::pde::OperationLTwoDotProductLinear, sgpp::pde::OperationLTwoDotProductLinearBoundary, sgpp::pde::OperationLTwoDotProductLinearStretched, and sgpp::pde::OperationLTwoDotProductLinearStretchedBoundary.

Referenced by updown().

updown()

void sgpp::pde::StdUpDown::updown ( sgpp::base::DataVector &  alpha, sgpp::base::DataVector &  result, size_t  dim  )

protected

Recursive procedure for updown.

Parameters

dim	the current dimension
alpha	vector of coefficients
result	vector to store the results in

References sgpp::base::DataVector::add(), algoDims, down(), sgpp::base::DataVector::getSize(), maxParallelDims_, numAlgoDims_, and up().

Referenced by mult(), and multParallelBuildingBlock().

Member Data Documentation

algoDims

const std::vector<size_t> sgpp::pde::StdUpDown::algoDims

protected

algorithmic dimensions, operator is applied in this dimensions

Referenced by updown().

maxParallelDims_

const size_t sgpp::pde::StdUpDown::maxParallelDims_ = TASKS_PARALLEL_UPDOWN

staticprotected

max number of parallel stages (dimension recursive calls)

Referenced by updown().

numAlgoDims_

const size_t sgpp::pde::StdUpDown::numAlgoDims_

protected

number of algorithmic dimensions

Referenced by mult(), multParallelBuildingBlock(), and updown().

storage

sgpp::base::GridStorage* sgpp::pde::StdUpDown::storage

protected

Pointer to the grid's storage object.

Referenced by sgpp::pde::OperationLTwoDotProductLinear::down(), sgpp::pde::OperationLTwoDotProductLinearBoundary::down(), sgpp::pde::OperationLTwoDotProductLinearStretchedBoundary::down(), sgpp::pde::OperationLTwoDotProductLinearStretched::down(), sgpp::pde::OperationLTwoDotProductLinearStretched::up(), sgpp::pde::OperationLTwoDotProductLinear::up(), sgpp::pde::OperationLTwoDotProductLinearBoundary::up(), and sgpp::pde::OperationLTwoDotProductLinearStretchedBoundary::up().

---

The documentation for this class was generated from the following files:

• pde/src/sgpp/pde/algorithm/StdUpDown.hpp
• pde/src/sgpp/pde/algorithm/StdUpDown.cpp