dmemory.c File Reference

Memory details. More...

#include "slu_ddefs.h"

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Macros
#define	StackFull(x)   ( x + Glu->stack.used >= Glu->stack.size )
#define	NotDoubleAlign(addr)   ( (intptr_t)addr & 7 )
#define	DoubleAlign(addr)   ( ((intptr_t)addr + 7) & ~7L )
#define	TempSpace(m, w)
#define	Reduce(alpha)   ((alpha + 1) / 2) /* i.e. (alpha-1)/2 + 1 */

Functions
void *	dexpand (int *prev_len,MemType type,int len_to_copy,int keep_prev,GlobalLU_t *Glu)
	Expand the existing storage to accommodate more fill-ins. More...
int	dLUWorkInit (int m, int n, int panel_size, int **iworkptr, double **dworkptr, GlobalLU_t *Glu)
	Allocate known working storage. Returns 0 if success, otherwise returns the number of bytes allocated so far when failure occurred. More...
void	copy_mem_double (int, void *, void *)
void	dStackCompress (GlobalLU_t *Glu)
	Compress the work[] array to remove fragmentation. More...
void	dSetupSpace (void *work, int lwork, GlobalLU_t *Glu)
	Setup the memory model to be used for factorization. More...
void *	duser_malloc (int, int, GlobalLU_t *)
void	duser_free (int, int, GlobalLU_t *)
void	copy_mem_int (int, void *, void *)
void	user_bcopy (char *, char *, int)
int	dQuerySpace (SuperMatrix *L, SuperMatrix *U, mem_usage_t *mem_usage)
int	ilu_dQuerySpace (SuperMatrix *L, SuperMatrix *U, mem_usage_t *mem_usage)
int	dLUMemInit (fact_t fact, void *work, int lwork, int m, int n, int annz, int panel_size, double fill_ratio, SuperMatrix *L, SuperMatrix *U, GlobalLU_t *Glu, int **iwork, double **dwork)
	Allocate storage for the data structures common to all factor routines. More...
void	dSetRWork (int m, int panel_size, double *dworkptr, double **dense, double **tempv)
	Set up pointers for real working arrays. More...
void	dLUWorkFree (int *iwork, double *dwork, GlobalLU_t *Glu)
	Free the working storage used by factor routines. More...
int	dLUMemXpand (int jcol, int next, MemType mem_type, int *maxlen, GlobalLU_t *Glu)
	Expand the data structures for L and U during the factorization. More...
void	dallocateA (int n, int nnz, double **a, int **asub, int **xa)
	Allocate storage for original matrix A. More...
double *	doubleMalloc (int n)
double *	doubleCalloc (int n)
int	dmemory_usage (const int nzlmax, const int nzumax, const int nzlumax, const int n)

Detailed Description

Copyright (c) 2003, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from U.S. Dept. of Energy)

All rights reserved.

The source code is distributed under BSD license, see the file License.txt at the top-level directory.

– SuperLU routine (version 4.0) –
Lawrence Berkeley National Laboratory.
June 30, 2009

Macro Definition Documentation

#define DoubleAlign

(

addr

)

( ((intptr_t)addr + 7) & ~7L )

#define NotDoubleAlign

(

addr

)

( (intptr_t)addr & 7 )

#define Reduce

(

alpha

)

((alpha + 1) / 2) /* i.e. (alpha-1)/2 + 1 */

#define StackFull

(

x

)

( x + Glu->stack.used >= Glu->stack.size )

#define TempSpace	(		m,
			w
	)

Value:

( (2*w + 4 + NO_MARKER) * m * sizeof(int) + \
                              (w + 1) * m * sizeof(double) )

Function Documentation

void copy_mem_double	(	int	howmany,
		void *	old,
		void *	new
	)

void copy_mem_int	(	int	,
		void *	,
		void *
	)

void dallocateA	(	int	n,
		int	nnz,
		double **	a,
		int **	asub,
		int **	xa
	)

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void * dexpand	(	int *	prev_len,
		MemType	type,
		int	len_to_copy,
		int	keep_prev,
		GlobalLU_t *	Glu
	)

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int dLUMemInit	(	fact_t	fact,
		void *	work,
		int	lwork,
		int	m,
		int	n,
		int	annz,
		int	panel_size,
		double	fill_ratio,
		SuperMatrix *	L,
		SuperMatrix *	U,
		GlobalLU_t *	Glu,
		int **	iwork,
		double **	dwork
	)

Memory-related.

For those unpredictable size, estimate as fill_ratio * nnz(A).
Return value:
    If lwork = -1, return the estimated amount of space required, plus n;
    otherwise, return the amount of space actually allocated when
    memory allocation failure occurred.

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int dLUMemXpand	(	int	jcol,
		int	next,
		MemType	mem_type,
		int *	maxlen,
		GlobalLU_t *	Glu
	)

Return value:   0 - successful return
              > 0 - number of bytes allocated when run out of space

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void dLUWorkFree	(	int *	iwork,
		double *	dwork,
		GlobalLU_t *	Glu
	)

int dLUWorkInit	(	int	m,
		int	n,
		int	panel_size,
		int **	iworkptr,
		double **	dworkptr,
		GlobalLU_t *	Glu
	)

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int dmemory_usage	(	const int	nzlmax,
		const int	nzumax,
		const int	nzlumax,
		const int	n
	)

double* doubleCalloc

(

int

n

)

double* doubleMalloc

(

int

n

)

int dQuerySpace	(	SuperMatrix *	L,
		SuperMatrix *	U,
		mem_usage_t *	mem_usage
	)

mem_usage consists of the following fields:


for_lu (float)
     The amount of space used in bytes for the L data structures.
total_needed (float)
     The amount of space needed in bytes to perform factorization.

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void dSetRWork	(	int	m,
		int	panel_size,
		double *	dworkptr,
		double **	dense,
		double **	tempv
	)

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void dSetupSpace	(	void *	work,
		int	lwork,
		GlobalLU_t *	Glu
	)

lwork = 0: use system malloc; lwork > 0: use user-supplied work[] space.

void dStackCompress

(

GlobalLU_t *

Glu

)

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void duser_free	(	int	bytes,
		int	which_end,
		GlobalLU_t *	Glu
	)

void * duser_malloc	(	int	bytes,
		int	which_end,
		GlobalLU_t *	Glu
	)

int ilu_dQuerySpace	(	SuperMatrix *	L,
		SuperMatrix *	U,
		mem_usage_t *	mem_usage
	)

mem_usage consists of the following fields:


for_lu (float)
     The amount of space used in bytes for the L data structures.
total_needed (float)
     The amount of space needed in bytes to perform factorization.

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void user_bcopy	(	char *	,
		char *	,
		int
	)