Exchange

Functions
t_exchanger *	new_exchanger (t_map *map, MPI_Datatype type, distdir_hardware hw)
	Create a new t_exchanger structure. More...
void	exchanger_go (t_exchanger *exchanger, void *src_data, void *dst_data)
	Arbitrary exchange given a map. More...
void	exchanger_go_with_transform (t_exchanger *exchanger, void *src_data, void *dst_data, int *transform_src, int *transform_dst)
	Arbitrary exchange given a map with transformation of memory layout. More...
void	delete_exchanger (t_exchanger *exchanger)
	Clean memory of a t_exchanger structure. More...

Detailed Description

User interface for the exchange between MPI ranks based on a provided t_map object and an MPI_Datatype

Function Documentation

delete_exchanger()

void delete_exchanger

(

t_exchanger *

exchanger

)

Clean memory of a t_exchanger structure.

Free all the memory of a t_exchanger structure

Parameters

[in]

exchanger

pointer to t_exchanger structure

exchanger_go()

void exchanger_go	(	t_exchanger *	exchanger,
		void *	src_data,
		void *	dst_data
	)

Arbitrary exchange given a map.

Execute the MPI exchange given a previously generated exchanger. The source and destination buffers contain the data before and after the exchange

Parameters

[in]	exchanger	pointer to a t_exchanger structure
[in]	src_data	pointer to the data to be sent
[in]	dst_data	pointer to the data to be received

exchanger_go_with_transform()

void exchanger_go_with_transform	(	t_exchanger *	exchanger,
		void *	src_data,
		void *	dst_data,
		int *	transform_src,
		int *	transform_dst
	)

Arbitrary exchange given a map with transformation of memory layout.

Execute the MPI exchange given a previously generated exchanger. The source and destination buffers contain the data before and after the exchange. A transformation array can be provided for source and destination.

Parameters

[in]	exchanger	pointer to a t_exchanger structure
[in]	src_data	pointer to the data to be sent
[in]	dst_data	pointer to the data to be received
[in]	transform_src	array of indices to define a memory layout transformation of the src_data
[in]	transform_dst	array of indices to define a memory layout transformation of the dst_data

new_exchanger()

t_exchanger* new_exchanger	(	t_map *	map,
		MPI_Datatype	type,
		distdir_hardware	hw
	)

Create a new t_exchanger structure.

Create an exchanger given a map object and a datatype

Parameters

[in]	map	pointer to a t_map structure
[in]	type	type of the data in the form of MPI datatype
[in]	hw	hardware location of the data on the MPI process