distCheckArray.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <mpi.h>
#include "superlu_ddefs.h"

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Functions
int	compareInt_t (void *a, void *b)
	Compares two integers for equality. More...
int	compareInt (void *a, void *b)
	Compares two integers for equality. More...
int	compareDouble (void *a, void *b)
	Compares two doubles for equality. More...
int	dist_checkArrayEq (void *arr, int length, MPI_Datatype datatype, int src_rank, int dest_rank, MPI_Comm communicator, int(*compare)(void *, void *))
	Checks whether arrays at two MPI ranks are identical. More...

Function Documentation

compareDouble()

int compareDouble	(	void *	a,
		void *	b
	)

Compares two doubles for equality.

Parameters

a	Void pointer to the first double
b	Void pointer to the second double

Returns

int Returns 0 if the doubles are equal, 1 otherwise

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compareInt()

int compareInt	(	void *	a,
		void *	b
	)

Compares two integers for equality.

Parameters

a	Void pointer to the first integer
b	Void pointer to the second integer

Returns

int Returns 0 if the integers are equal, 1 otherwise

compareInt_t()

int compareInt_t	(	void *	a,
		void *	b
	)

Compares two integers for equality.

Parameters

a	Void pointer to the first integer
b	Void pointer to the second integer

Returns

int Returns 0 if the integers are equal, 1 otherwise

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dist_checkArrayEq()

int dist_checkArrayEq	(	void *	arr,
		int	length,
		MPI_Datatype	datatype,
		int	src_rank,
		int	dest_rank,
		MPI_Comm	communicator,
		int(*)(void *, void *)	compare
	)

Checks whether arrays at two MPI ranks are identical.

This function is used to check if a copy of an array at two different MPI ranks are the same. It uses MPI_Send and MPI_Recv to transfer data between ranks, then compares the arrays.

Parameters

arr	Void pointer to the array to be compared
length	The length of the array
datatype	MPI_Datatype of the array elements
src_rank	The source rank that has the original array
dest_rank	The destination rank that has the copied array
communicator	The MPI_Comm communicator that includes both ranks
compare	A function pointer to the function used to compare elements. Should take two void pointers and return 0 if they are equal and a non-zero value otherwise.

Returns

int Returns 0 if arrays are identical, 1 otherwise.

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