xt_xmap_dist_dir.h File Reference

#include "xt/xt_core.h"

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Functions
Xt_xmap	xt_xmap_dist_dir_new (Xt_idxlist src_idxlist, Xt_idxlist dst_idxlist, MPI_Comm comm)
Xt_xmap	xt_xmap_dist_dir_intracomm_new (Xt_idxlist src_idxlist, Xt_idxlist dst_idxlist, MPI_Comm comm)

Detailed Description

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_xmap_dist_dir.h.

Function Documentation

xt_xmap_dist_dir_intracomm_new()

Xt_xmap xt_xmap_dist_dir_intracomm_new	(	Xt_idxlist	src_idxlist,
		Xt_idxlist	dst_idxlist,
		MPI_Comm	comm
	)

Construct an exchange map.
This operation is collective over all processes in comm.
It uses a distributed directory to reduce communication and computation during the initialisation at the cost of some extra latency because more network transfers than for xt_xmap_all2all_new are required.

Parameters

[in]	src_idxlist	source index list
[in]	dst_idxlist	destination index list
[in]	comm	MPI communicator that contains all processes that take part in the exchange (xt_xmap_dist_dir_new will make its own copy of comm), must be an intracommunicator.

Definition at line 649 of file xt_xmap_dist_dir.c.

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xt_xmap_dist_dir_new()

Xt_xmap xt_xmap_dist_dir_new	(	Xt_idxlist	src_idxlist,
		Xt_idxlist	dst_idxlist,
		MPI_Comm	comm
	)

Construct an exchange map.
This operation is collective over all processes in comm.
It uses a distributed directory to reduce communication and computation during the initialisation at the cost of some extra latency because more network transfers than for xt_xmap_all2all_new are required.

Parameters

[in]	src_idxlist	source index list
[in]	dst_idxlist	destination index list
[in]	comm	MPI communicator that contains all processes that take part in the exchange (xt_xmap_dist_dir_new will make its own copy of comm)

Examples:

test_xmap_dist_dir.c, test_xmap_dist_dir_intercomm_parallel.c, and test_xmap_dist_dir_parallel.c.

Definition at line 353 of file xt_xmap_dist_dir_common.c.

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