parall Module Reference

Data Types
interface	cs_parall_allgather_r
	Build a global array from each local array in each domain. More...
interface	parall_bcast_i
	Broadcast an integer in case of parellism. More...
interface	parall_bcast_r
	Broadcast a real number in case of parellism. More...
interface	parbar
	Set a barrier on all default communicator processes. More...
interface	parbci
	Broadcast an array of integers in case of parellism. More...
interface	parbcr
	Broadcast an array of real numbers in case of parellism. More...
interface	parcmn
	Compute the global minimum of an integer in case of parellism. More...
interface	parcmx
	Compute the global maximum of an integer in case of parellism. More...
interface	parcpt
	Compute the global sum of an integer in case of parellism. More...
interface	parfpt
	Given an (id, rank, value) tuple, return the local id, rank, and value corresponding to the global minimum value. More...
interface	parimn
	Compute the global minima of an array of integers in case of parellism. More...
interface	parimx
	Compute the global maxima of an array of integers in case of parellism. More...
interface	parism
	Compute the global sums of an array of integers in case of parellism. More...
interface	parmax
	Compute the global maximum of a real number in case of parellism. More...
interface	parmin
	Compute the global minimum of a real number in case of parellism. More...
interface	parmnl
	Minimum value of a real and the value of related array on all default communicator processes. More...
interface	parmxl
	Maximum value of a real and the value of related array on all default communicator processes. More...
interface	parrmn
	Compute the global minima of an array of real numbers in case of parellism. More...
interface	parrmx
	Compute the global maxima of an array of real numbers in case of parellism. More...
interface	parrsm
	Compute the global sums of an array of real numbers in case of parellism. More...
interface	parsom
	Compute the global sum of a real number in case of parellism. More...

Functions/Subroutines
subroutine	paragv (n_elts, n_g_elts, array, g_array)
	Build a global array from each local array in each domain. More...

Variables
integer	thr_n_min
	thr_n_min : minimum number of elements for loops on threads More...
integer, save	irangp
	process rank More...
integer, save	nrangp
	number of processes (=1 if sequental) More...
integer(kind=8), save	ncelgb
	global number of cells More...
integer(kind=8), save	nfacgb
	global number of interior faces More...
integer(kind=8), save	nfbrgb
	global number of boundary faces More...
integer(kind=8), save	nsomgb
	global number of vertices More...

Function/Subroutine Documentation

paragv()

subroutine parall::paragv	(	integer(c_int), value	n_elts,
		integer(c_int), value	n_g_elts,
		real(c_double), dimension(:), intent(in)	array,
		real(c_double), dimension(:), intent(inout)	g_array
	)

Build a global array from each local array in each domain.

Local arrays are appened in order of owning MPI rank. The size of each local array may be different. Use of this function may be quite practical, but should be limited to user functions, as it may limit scalability (especially as regards memory usage).

Parameters

[in]	n_elts	size of the local array
[in]	n_g_elts	size of the global array
[in]	array	local array (size: n_elts)
[out]	g_array	global array (size: n_g_elts)