GPUCGPreconditioner Class Reference

CG iteration-based preconditioner (GPU variant). More...

#include <preconditioners.h>

Inheritance diagram for GPUCGPreconditioner:

Collaboration diagram for GPUCGPreconditioner:

Public Member Functions
	GPUCGPreconditioner (Parallel const &par, InputFile const &inp, std::vector< std::pair< int, int >> const &ll, Bspline const &bspline, CommandLine const &cmd)
virtual RadialIntegrals const &	rad () const
	Get radial integrals. More...
virtual void	setup ()
	Initialize the preconditioner. More...
virtual void	update (double E)
	Update the preconditioner for the next energy. More...
virtual void	rhs (cArrayView chi, int ienergy, int instate) const
	Return the right-hand side. More...
virtual void	multiply (const cArrayView p, cArrayView q) const
	Multiply by the matrix equation. More...
virtual void	precondition (const cArrayView r, cArrayView z) const
	Precondition the equation. More...
Public Member Functions inherited from NoPreconditioner
	NoPreconditioner (Parallel const &par, InputFile const &inp, std::vector< std::pair< int, int >> const &ll, Bspline const &bspline, CommandLine const &cmd)

Static Public Attributes
static const std::string	name = "gpuJacobi"
static const std::string	description = "Block inversion using Jacobi-preconditioned conjugate gradients (GPU variant)."
Static Public Attributes inherited from NoPreconditioner
static const std::string	name = "none"
static const std::string	description = "Preconditioning by the identity matrix."

Additional Inherited Members
Protected Attributes inherited from NoPreconditioner
CommandLine const &	cmd_
Parallel const &	par_
InputFile const &	inp_
std::vector< std::pair< int, int > > const &	l1_l2_
std::vector< SymDiaMatrix >	dia_blocks_
Bspline	s_bspline_
RadialIntegrals	s_rad_
SymDiaMatrix	S_kron_S_
SymDiaMatrix	S_kron_Mm1_tr_
SymDiaMatrix	S_kron_Mm2_
SymDiaMatrix	Mm1_tr_kron_S_
SymDiaMatrix	Mm2_kron_S_
SymDiaMatrix	half_D_minus_Mm1_tr_
SymDiaMatrix	half_D_minus_Mm1_tr_kron_S_
SymDiaMatrix	S_kron_half_D_minus_Mm1_tr_

Detailed Description

This class adds some preconditioning capabilities to its base class NoPreconditioner. The preconditioning is done by diagonal block solution using the conjugate gradients solver (which itself is non-preconditioned).

Constructor & Destructor Documentation

GPUCGPreconditioner::GPUCGPreconditioner ( Parallel const &  par, InputFile const &  inp, std::vector< std::pair< int, int >> const &  ll, Bspline const &  bspline, CommandLine const &  cmd  )

inline

Member Function Documentation

virtual void GPUCGPreconditioner::multiply ( const cArrayView  p, cArrayView  q  ) const

inlinevirtual

This function implements matrix multiplication by the matrix of the set of equations that is to be solved.

Reimplemented from NoPreconditioner.

void GPUCGPreconditioner::precondition ( const cArrayView  r, cArrayView  z  ) const

virtual

This function preconditions the equation, solving the preconditioner equation

\[ \mathbf{M}\mathbf{z} = \mathbf{r} \ . \]

It may use the MPI environment.

Reimplemented from NoPreconditioner.

virtual RadialIntegrals const& GPUCGPreconditioner::rad ( ) const

inlinevirtual

Reimplemented from NoPreconditioner.

virtual void GPUCGPreconditioner::rhs ( cArrayView  chi, int  ienergy, int  instate  ) const

inlinevirtual

Reimplemented from NoPreconditioner.

void GPUCGPreconditioner::setup ( )

virtual

This function contains all computation intensive preparations for the preconditioner, e.g. computation of radial integrals. It may use only SMP environment.

Reimplemented from NoPreconditioner.

void GPUCGPreconditioner::update ( double  E )

virtual

This function updates the preconditioner for another right hand side. It may use the MPI environment.

Reimplemented from NoPreconditioner.

Field Documentation

const std::string GPUCGPreconditioner::description = "Block inversion using Jacobi-preconditioned conjugate gradients (GPU variant)."

static

const std::string GPUCGPreconditioner::name = "gpuJacobi"

static

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

• src/preconditioners.h
• src/preconditioners.cpp