PreCSR.c File Reference

Preconditioners for dCSRmat matrices. More...

#include "fasp.h"
#include "fasp_functs.h"
#include "PreMGUtil.inl"

Go to the source code of this file.

Functions
precond *	fasp_precond_setup (const SHORT precond_type, AMG_param *amgparam, ILU_param *iluparam, dCSRmat *A)
	Setup preconditioner interface for iterative methods. More...
void	fasp_precond_diag (REAL *r, REAL *z, void *data)
	Diagonal preconditioner z=inv(D)*r. More...
void	fasp_precond_ilu (REAL *r, REAL *z, void *data)
	ILU preconditioner. More...
void	fasp_precond_ilu_forward (REAL *r, REAL *z, void *data)
	ILU preconditioner: only forward sweep. More...
void	fasp_precond_ilu_backward (REAL *r, REAL *z, void *data)
	ILU preconditioner: only backward sweep. More...
void	fasp_precond_swz (REAL *r, REAL *z, void *data)
	get z from r by Schwarz More...
void	fasp_precond_amg (REAL *r, REAL *z, void *data)
	AMG preconditioner. More...
void	fasp_precond_famg (REAL *r, REAL *z, void *data)
	Full AMG preconditioner. More...
void	fasp_precond_amli (REAL *r, REAL *z, void *data)
	AMLI AMG preconditioner. More...
void	fasp_precond_namli (REAL *r, REAL *z, void *data)
	Nonlinear AMLI AMG preconditioner. More...
void	fasp_precond_amg_nk (REAL *r, REAL *z, void *data)
	AMG with extra near kernel solve as preconditioner. More...

Detailed Description

Preconditioners for dCSRmat matrices.

Note

This file contains Level-4 (Pre) functions. It requires: AuxArray.c, AuxMemory.c, AuxParam.c, AuxVector.c, BlaILUSetupCSR.c, BlaSchwarzSetup.c, BlaSparseCSR.c, BlaSpmvCSR.c, KrySPcg.c, KrySPvgmres.c, PreAMGSetupRS.c, PreAMGSetupSA.c, PreAMGSetupUA.c, PreDataInit.c, PreMGCycle.c, PreMGCycleFull.c, and PreMGRecurAMLI.c

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Copyright (C) 2009–Present by the FASP team. All rights reserved.

Released under the terms of the GNU Lesser General Public License 3.0 or later.

Definition in file PreCSR.c.

Function Documentation

fasp_precond_amg()

void fasp_precond_amg	(	REAL *	r,
		REAL *	z,
		void *	data
	)

AMG preconditioner.

Parameters

r	Pointer to the vector needs preconditioning
z	Pointer to preconditioned vector
data	Pointer to precondition data

Author

Chensong Zhang

Date

04/06/2010

Definition at line 416 of file PreCSR.c.

fasp_precond_amg_nk()

void fasp_precond_amg_nk	(	REAL *	r,
		REAL *	z,
		void *	data
	)

AMG with extra near kernel solve as preconditioner.

Parameters

r	Pointer to the vector needs preconditioning
z	Pointer to preconditioned vector
data	Pointer to precondition data

Author

Xiaozhe Hu

Date

05/26/2014

Definition at line 548 of file PreCSR.c.

fasp_precond_amli()

void fasp_precond_amli	(	REAL *	r,
		REAL *	z,
		void *	data
	)

AMLI AMG preconditioner.

Parameters

r	Pointer to the vector needs preconditioning
z	Pointer to preconditioned vector
data	Pointer to precondition data

Author

Xiaozhe Hu

Date

01/23/2011

Definition at line 482 of file PreCSR.c.

fasp_precond_diag()

void fasp_precond_diag	(	REAL *	r,
		REAL *	z,
		void *	data
	)

Diagonal preconditioner z=inv(D)*r.

Parameters

r	Pointer to the vector needs preconditioning
z	Pointer to preconditioned vector
data	Pointer to precondition data

Author

Chensong Zhang

Date

04/06/2010

Definition at line 172 of file PreCSR.c.

fasp_precond_famg()

void fasp_precond_famg	(	REAL *	r,
		REAL *	z,
		void *	data
	)

Full AMG preconditioner.

Parameters

r	Pointer to the vector needs preconditioning
z	Pointer to preconditioned vector
data	Pointer to precondition data

Author

Xiaozhe Hu

Date

02/27/2011

Definition at line 449 of file PreCSR.c.

fasp_precond_ilu()

void fasp_precond_ilu	(	REAL *	r,
		REAL *	z,
		void *	data
	)

ILU preconditioner.

Parameters

r	Pointer to the vector needs preconditioning
z	Pointer to preconditioned vector
data	Pointer to precondition data

Author

Shiquan Zhang

Date

04/06/2010

Definition at line 198 of file PreCSR.c.

fasp_precond_ilu_backward()

void fasp_precond_ilu_backward	(	REAL *	r,
		REAL *	z,
		void *	data
	)

ILU preconditioner: only backward sweep.

Parameters

r	Pointer to the vector needs preconditioning
z	Pointer to preconditioned vector
data	Pointer to precondition data

Author

Xiaozhe Hu, Shiquan Zhang

Date

04/06/2010

Definition at line 317 of file PreCSR.c.

fasp_precond_ilu_forward()

void fasp_precond_ilu_forward	(	REAL *	r,
		REAL *	z,
		void *	data
	)

ILU preconditioner: only forward sweep.

Parameters

r	Pointer to the vector needs preconditioning
z	Pointer to preconditioned vector
data	Pointer to precondition data

Author

Xiaozhe Hu, Shiquang Zhang

Date

04/06/2010

Definition at line 263 of file PreCSR.c.

fasp_precond_namli()

void fasp_precond_namli	(	REAL *	r,
		REAL *	z,
		void *	data
	)

Nonlinear AMLI AMG preconditioner.

Parameters

r	Pointer to the vector needs preconditioning
z	Pointer to preconditioned vector
data	Pointer to precondition data

Author

Xiaozhe Hu

Date

04/25/2011

Definition at line 515 of file PreCSR.c.

fasp_precond_setup()

precond * fasp_precond_setup	(	const SHORT	precond_type,
		AMG_param *	amgparam,
		ILU_param *	iluparam,
		dCSRmat *	A
	)

Setup preconditioner interface for iterative methods.

Parameters

precond_type	Preconditioner type
amgparam	Pointer to AMG parameters
iluparam	Pointer to ILU parameters
A	Pointer to the coefficient matrix

Returns

Pointer to preconditioner

Author

Feiteng Huang

Date

05/18/2009

Definition at line 46 of file PreCSR.c.

fasp_precond_swz()

void fasp_precond_swz	(	REAL *	r,
		REAL *	z,
		void *	data
	)

get z from r by Schwarz

Parameters

r	Pointer to residual
z	Pointer to preconditioned residual
data	Pointer to precondition data

Author

Xiaozhe Hu

Date

03/22/2010

Note

Change Schwarz interface by Zheng Li on 11/18/2014

Definition at line 371 of file PreCSR.c.