cp_blacs_env Module Reference

methods related to the blacs parallel environment More...

Data Types
type	cp_blacs_env_type
	represent a blacs multidimensional parallel environment (for the mpi corrispective see cp_paratypes/mp_para_cart_type) More...

Functions/Subroutines
subroutine	get_blacs_info (blacs_env, my_process_row, my_process_column, my_process_number, number_of_process_rows, number_of_process_columns, number_of_processes, para_env, blacs2mpi, mpi2blacs)
	Return informations about the specified BLACS context.
subroutine, public	cp_blacs_env_create (blacs_env, para_env, blacs_grid_layout, blacs_repeatable, row_major, grid_2d)
	allocates and initializes a type that represent a blacs context
subroutine, public	cp_blacs_env_release (blacs_env)
	releases the given blacs_env

Variables
integer, parameter, public	blacs_grid_square = 1
integer, parameter, public	blacs_grid_row = 2
integer, parameter, public	blacs_grid_col = 3

Detailed Description

methods related to the blacs parallel environment

History

08.2002 created [fawzi] 02.2004 modified to associate a blacs_env with a given para_env

Author

Fawzi Mohamed

Function/Subroutine Documentation

get_blacs_info()

subroutine cp_blacs_env::get_blacs_info	(	class(cp_blacs_env_type), intent(in)	blacs_env,
		integer, intent(out), optional	my_process_row,
		integer, intent(out), optional	my_process_column,
		integer, intent(out), optional	my_process_number,
		integer, intent(out), optional	number_of_process_rows,
		integer, intent(out), optional	number_of_process_columns,
		integer, intent(out), optional	number_of_processes,
		type(mp_para_env_type), optional, pointer	para_env,
		integer, dimension(:, :), optional, pointer	blacs2mpi,
		integer, dimension(:, :), optional, pointer	mpi2blacs
	)

Return informations about the specified BLACS context.

Parameters

blacs_env	...
my_process_row	...
my_process_column	...
my_process_number	...
number_of_process_rows	...
number_of_process_columns	...
number_of_processes	...
para_env	...
blacs2mpi	...
mpi2blacs	...

Date

19.06.2001

History

MM.YYYY moved here from qs_blacs (Joost VandeVondele)

Author

Matthias Krack

Version

1.0

Definition at line 88 of file cp_blacs_env.F.

cp_blacs_env_create()

subroutine, public cp_blacs_env::cp_blacs_env_create	(	type(cp_blacs_env_type), intent(out), pointer	blacs_env,
		type(mp_para_env_type), intent(inout), target	para_env,
		integer, intent(in), optional	blacs_grid_layout,
		logical, intent(in), optional	blacs_repeatable,
		logical, intent(in), optional	row_major,
		integer, dimension(:), intent(in), optional	grid_2d
	)

allocates and initializes a type that represent a blacs context

Parameters

blacs_env	the type to initialize
para_env	the para_env for which a blacs env should be created
blacs_grid_layout	...
blacs_repeatable	...
row_major	...
grid_2d	...

History

08.2002 created [fawzi]

Author

Fawzi Mohamed

Definition at line 122 of file cp_blacs_env.F.

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cp_blacs_env_release()

subroutine, public cp_blacs_env::cp_blacs_env_release

(

type(cp_blacs_env_type), pointer

blacs_env

)

releases the given blacs_env

Parameters

blacs_env

the blacs env to release

History

08.2002 created [fawzi]

Author

Fawzi Mohamed

Definition at line 273 of file cp_blacs_env.F.

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Variable Documentation

blacs_grid_square

integer, parameter, public cp_blacs_env::blacs_grid_square = 1

Definition at line 32 of file cp_blacs_env.F.

blacs_grid_row

integer, parameter, public cp_blacs_env::blacs_grid_row = 2

Definition at line 32 of file cp_blacs_env.F.

blacs_grid_col

integer, parameter, public cp_blacs_env::blacs_grid_col = 3

Definition at line 32 of file cp_blacs_env.F.