processgridmodule Module Reference

A module to manage the process grid. More...

Functions/Subroutines
subroutine, public	constructprocessgrid (world_comm_, process_rows_, process_columns_, process_slices_, be_verbose_in)
	Construct the process grid. More...
logical function, public	isroot ()
	Check if the current process is the root process. More...

Variables
integer, public	total_processors
	total processors in the grid.
integer, public	num_process_rows
	number of rows in the grid.
integer, public	num_process_columns
	number of columns in the grid.
integer, public	num_process_slices
	number of 2D slices in the grid.
integer, public	slice_size
	the slice of a 2D slice. Identiy current process
integer, public	my_slice
	which slice is the current process in.
integer, public	my_row
	which row is the current process in.
integer, public	my_column
	which column is the current process in. Ranks for communication
integer, public	global_rank
	current process's rank amongst processes.
integer, public	within_slice_rank
	rank for within slice communication.
integer, public	between_slice_rank
	rank for between slice communication.
integer, public	column_rank
	rank for within column communication.
integer, public	row_rank
	rank for within row communication. Communicators for communication
integer, public	global_comm
	communicator with every other process.
integer, public	row_comm
	communicator within a row.
integer, public	column_comm
	communicator within a column.
integer, public	within_slice_comm
	communicator within a slice.
integer, public	between_slice_comm
	communicator between slices.
integer, public	grid_error
	stores errors from MPI calls.
integer, public	rootid = 0
	Which rank is root? Blocked communication.
integer, public	block_multiplier
	Block scaling factor.
integer, public	number_of_blocks_columns
	number of column blocks.
integer, public	number_of_blocks_rows
	number of row blocks.
integer, dimension(:), allocatable, public	blocked_row_comm
	blocked communicator within a row.
integer, dimension(:), allocatable, public	blocked_column_comm
	blocked communicator within a column.
integer, dimension(:,:), allocatable, public	blocked_within_slice_comm
	blocked communicator within a slice.
integer, dimension(:,:), allocatable, public	blocked_between_slice_comm
	blocked communicator between slices.

Detailed Description

A module to manage the process grid.

Function/Subroutine Documentation

constructprocessgrid()

subroutine, public processgridmodule::constructprocessgrid	(	integer(kind=c_int), intent(in)	world_comm_,
		integer(kind=c_int), intent(in)	process_rows_,
		integer(kind=c_int), intent(in)	process_columns_,
		integer(kind=c_int), intent(in)	process_slices_,
		logical(kind=c_bool), intent(in), optional	be_verbose_in
	)

Construct the process grid.

Parameters

[in]	world_comm_	a communicator that every process in the grid is a part of.
[in]	process_rows_	number of grid rows.
[in]	process_columns_	number of grid columns.
[in]	process_slices_	number of grid slices.
[in]	be_verbose_in	set true to print process grid info.

isroot()

logical function, public processgridmodule::isroot

(

)

Check if the current process is the root process.

Returns

true if the current process is root.