xt_redist.h File Reference

redistribution of data More...

#include <mpi.h>
#include "xt/xt_core.h"

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Functions
Xt_redist	xt_redist_copy (Xt_redist redist)
void	xt_redist_delete (Xt_redist redist)
void	xt_redist_s_exchange (Xt_redist redist, int num_arrays, const void **src_data, void **dst_data)
void	xt_redist_s_exchange1 (Xt_redist redist, const void *src_data, void *dst_data)
MPI_Datatype	xt_redist_get_send_MPI_Datatype (Xt_redist redist, int rank)
MPI_Datatype	xt_redist_get_recv_MPI_Datatype (Xt_redist redist, int rank)
MPI_Comm	xt_redist_get_MPI_Comm (Xt_redist redist)

Detailed Description

redistribution of data

contains declaration the redistribution data structure, which is derived from one or more xt_xmaps

Copyright

Copyright (C) 2016 Jörg Behrens behre.nosp@m.ns@d.nosp@m.krz.d.nosp@m.e Moritz Hanke hanke.nosp@m.@dkr.nosp@m.z.de Thomas Jahns jahns.nosp@m.@dkr.nosp@m.z.de

Author

Jörg Behrens behre.nosp@m.ns@d.nosp@m.krz.d.nosp@m.e Moritz Hanke hanke.nosp@m.@dkr.nosp@m.z.de Thomas Jahns jahns.nosp@m.@dkr.nosp@m.z.de

Definition in file xt_redist.h.

Function Documentation

xt_redist_copy()

Xt_redist xt_redist_copy

(

Xt_redist

redist

)

redist copy constructor

Parameters

[in,out]

redist

redistribution structure

Examples:

test_redist_collection.c, test_redist_collection_parallel.c, test_redist_collection_static_parallel.c, and test_redist_p2p.c.

Definition at line 61 of file xt_redist.c.

xt_redist_delete()

void xt_redist_delete

(

Xt_redist

redist

)

destructor

Parameters

[in,out]

redist

redistribution structure

Examples:

rrobin.c, test_redist_collection.c, test_redist_collection_parallel.c, test_redist_collection_static.c, test_redist_collection_static_parallel.c, test_redist_p2p.c, test_redist_p2p_parallel.c, test_redist_repeat.c, and test_redist_repeat_parallel.c.

Definition at line 66 of file xt_redist.c.

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xt_redist_get_MPI_Comm()

MPI_Comm xt_redist_get_MPI_Comm

(

Xt_redist

redist

)

returns a MPI communicator, which the redistribution is based on

Parameters

[in]

redist

redistribution structure

Returns

MPI communicator, which the redistribution is based on

Examples:

test_redist_collection.c, test_redist_collection_parallel.c, test_redist_collection_static.c, test_redist_collection_static_parallel.c, test_redist_p2p.c, test_redist_p2p_parallel.c, test_redist_repeat.c, and test_redist_repeat_parallel.c.

Definition at line 92 of file xt_redist.c.

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xt_redist_get_recv_MPI_Datatype()

MPI_Datatype xt_redist_get_recv_MPI_Datatype	(	Xt_redist	redist,
		int	rank
	)

gets a copy of the MPI_Datatype used for the data of the recv operation with the given rank

Parameters

[in]	redist	redistribution structure
[in]	rank	MPI rank

Returns

MPI_Datatype for the data of the recv operation with the given rank

Remarks

returns MPI_DATATYPE_NULL if there is no recv operation with the given rank

Definition at line 87 of file xt_redist.c.

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xt_redist_get_send_MPI_Datatype()

MPI_Datatype xt_redist_get_send_MPI_Datatype	(	Xt_redist	redist,
		int	rank
	)

gets a copy of the MPI_Datatype used for the data of the send operation with the given rank

Parameters

[in]	redist	redistribution structure
[in]	rank	MPI rank

Returns

MPI_Datatype for the data of the send operation with the given rank

Remarks

returns MPI_DATATYPE_NULL if there is no send operation with the given rank

Definition at line 82 of file xt_redist.c.

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xt_redist_s_exchange()

void xt_redist_s_exchange	(	Xt_redist	redist,
		int	num_arrays,
		const void **	src_data,
		void **	dst_data
	)

synchronous redistribution of data

Parameters

[in]	redist	redistribution structure
[in]	num_arrays	number of base addresses in src_data and dst_data
[in]	src_data	array containing the addresses of the first elements of the input data
[in,out]	dst_data	array containing the addresses of the first elements of the output data

Remarks

The above implies that NULL or any other invalid pointer must not be used in either src_data or dst_data.

Examples:

test_redist_collection.c, test_redist_collection_parallel.c, and test_redist_p2p_parallel.c.

Definition at line 71 of file xt_redist.c.

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xt_redist_s_exchange1()

void xt_redist_s_exchange1	(	Xt_redist	redist,
		const void *	src_data,
		void *	dst_data
	)

synchronous redistribution of data - single array case

Parameters

[in]	redist	redistribution structure
[in]	src_data	address of the first element of the input data
[in,out]	dst_data	address of the first element of the output data

Remarks

The above implies that NULL or any other invalid pointer must not be used in either src_data or dst_data.

Examples:

rrobin.c, test_redist_collection.c, test_redist_collection_static.c, test_redist_collection_static_parallel.c, test_redist_common.c, test_redist_p2p_parallel.c, test_redist_repeat.c, and test_redist_repeat_parallel.c.

Definition at line 77 of file xt_redist.c.