kmratoa.c File Reference

Communication Routines. More...

#include <mpi.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>
#include <assert.h>
#include "kmr.h"
#include "kmrimpl.h"

Go to the source code of this file.

Macros
#define	DUMP_(X0, X1, X2, X3, X4)   if (tracing) kmr_atoa_dump_(X0,X1,X2,X3,X4)
#define	MAX(a, b)   (((a)>(b))?(a):(b))

Functions
int	kmr_allgatherv (KMR *mr, _Bool rankzeroonly, void *sbuf, long scnt, void *rbuf, long *rcnts, long *rdsps)
	All-gathers data, or gathers data when RANKZEROONLY. More...
static int	kmr_alltoall_bruck (KMR *mr, void *sbuf, void *rbuf, int cnt)
int	kmr_alltoallv (KMR *mr, void *sbuf, long *scnts, long *sdsps, void *rbuf, long *rcnts, long *rdsps)
	Does all-to-all-v, but it takes arguments of long-integers. More...
static int	kmr_alltoallv_bruck (KMR *mr, void *sbuf, long *scnts, long *sdsps, void *rbuf, long *rcnts, long *rdsps)
static int	kmr_alltoallv_mpi (KMR *mr, void *sbuf, long *scnts, long *sdsps, void *rbuf, long *rcnts, long *rdsps)
static void	kmr_atoa_dump_ (KMR *mr, void *sbuf, int sz, char *title, int step)
int	kmr_exchange_sizes (KMR *mr, long *sbuf, long *rbuf)
	Calls all-to-all to exchange one long-integer. More...
int	kmr_gather_sizes (KMR *mr, long siz, long *rbuf)
	Calls all-gather for collecting one long-integer. More...
static _Bool	kmr_powerof2_p (int x)
static _Bool	kmr_powerof4_p (int x)

Detailed Description

Communication Routines.

KMR makes almost all data exchanges through this. Some exceptions are "kmrmapms.c" and "kmrfiles.c". It provides operations with size_t data length.

Definition in file kmratoa.c.

Function Documentation

int kmr_exchange_sizes	(	KMR *	mr,
		long *	sbuf,
		long *	rbuf
	)

Calls all-to-all to exchange one long-integer.

Definition at line 46 of file kmratoa.c.

int kmr_gather_sizes	(	KMR *	mr,
		long	siz,
		long *	rbuf
	)

Calls all-gather for collecting one long-integer.

Definition at line 58 of file kmratoa.c.

int kmr_allgatherv	(	KMR *	mr,
		_Bool	rankzeroonly,
		void *	sbuf,
		long	scnt,
		void *	rbuf,
		long *	rcnts,
		long *	rdsps
	)

All-gathers data, or gathers data when RANKZEROONLY.

Definition at line 70 of file kmratoa.c.

int kmr_alltoallv	(	KMR *	mr,
		void *	sbuf,
		long *	scnts,
		long *	sdsps,
		void *	rbuf,
		long *	rcnts,
		long *	rdsps
	)

Does all-to-all-v, but it takes arguments of long-integers.

Setting ATOA_THRESHOLD=0 forces to use MPI all-to-all-v.

Definition at line 116 of file kmratoa.c.