#include "cs_defs.h"

Include dependency graph for cs_parall.h:

Functions
void	CS_PROCF (parhis, PARHIS)(cs_int_t *node

static void	cs_parall_counter (cs_gnum_t cpt[], const int n)
	Sum values of a counter on all default communicator processes. More...

static void	cs_parall_counter_max (cs_lnum_t cpt[], const int n)
	Maximum values of a counter on all default communicator processes. More...

static void	cs_parall_sum (int n, cs_datatype_t datatype, void *val)
	Sum values of a given datatype on all default communicator processes. More...

static void	cs_parall_max (int n, cs_datatype_t datatype, void *val)
	Maximum values of a given datatype on all default communicator processes. More...

static void	cs_parall_min (int n, cs_datatype_t datatype, void *val)
	Minimum values of a given datatype on all default communicator processes. More...

static void	cs_parall_bcast (int root_rank, int n, cs_datatype_t datatype, void *val)
	Broadcast values of a given datatype to all default communicator processes. More...

void	cs_parall_allgather_r (int n_elts, int n_g_elts, cs_real_t array[], cs_real_t g_array[])
	Build a global array from each local array in each domain. More...

void	cs_parall_max_loc_vals (int n, cs_real_t *max, cs_real_t max_loc_vals[])
	Maximum value of a real and the value of related array on all default communicator processes. More...

void	cs_parall_min_loc_vals (int n, cs_real_t *min, cs_real_t min_loc_vals[])
	Minimum value of a real and the value of related array on all default communicator processes. More...

void	cs_parall_min_id_rank_r (cs_lnum_t elt_id, int rank_id, cs_real_t dis2mn)
	Given an (id, rank, value) tuple, return the local id and rank corresponding to the global minimum value. More...

size_t	cs_parall_get_min_coll_buf_size (void)
	Return minimum recommended scatter or gather buffer size. More...

void	cs_parall_set_min_coll_buf_size (size_t buffer_size)
	Define minimum recommended scatter or gather buffer size. More...

Variables
void cs_int_t *	ndrang

void cs_int_t cs_real_t	var []

void cs_int_t cs_real_t cs_real_t *	varcap

Function Documentation

◆ cs_parall_allgather_r()

void cs_parall_allgather_r	(	int	n_elts,
		int	n_g_elts,
		cs_real_t	array[],
		cs_real_t	g_array[]
	)

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

Local arrays are appended 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)

◆ cs_parall_bcast()

static void cs_parall_bcast	(	int	root_rank,
		int	n,
		cs_datatype_t	datatype,
		void *	val
	)

inlinestatic

Broadcast values of a given datatype to all default communicator processes.

Parameters

[in]	root_rank	rank from which to broadcast
[in]	n	number of values
[in]	datatype	matching Code_Saturne datatype
[in,out]	val	values to broadcast; input on root_rank, output on others (size: n)

◆ cs_parall_counter()

static void cs_parall_counter	(	cs_gnum_t	cpt[],
		const int	n
	)

inlinestatic

Sum values of a counter on all default communicator processes.

Parameters

[in,out]	cpt	local counter in, global counter out (size: n)
[in]	n	number of values

◆ cs_parall_counter_max()

static void cs_parall_counter_max	(	cs_lnum_t	cpt[],
		const int	n
	)

inlinestatic

Maximum values of a counter on all default communicator processes.

Parameters

[in,out]	cpt	local counter in, global counter out (size: n)
[in]	n	number of values

◆ cs_parall_get_min_coll_buf_size()

size_t cs_parall_get_min_coll_buf_size ( void )

Return minimum recommended scatter or gather buffer size.

This is used by some internal part to block or scatter/gather algorithms, so as to allow I/O buffer size tuning.

Returns: minimum recommended part to block or gather buffer size (in bytes)

◆ cs_parall_max()

static void cs_parall_max	(	int	n,
		cs_datatype_t	datatype,
		void *	val
	)

inlinestatic

Maximum values of a given datatype on all default communicator processes.

Parameters

[in]	n	number of values
[in]	datatype	matching Code_Saturne datatype
[in,out]	val	local maximum in, global maximum out (size: n)

◆ cs_parall_max_loc_vals()

void cs_parall_max_loc_vals	(	int	n,
		cs_real_t *	max,
		cs_real_t	max_loc_vals[]
	)

Maximum value of a real and the value of related array on all default communicator processes.

Parameters

[in]	n	size of the related array
[in,out]	max	local max in, global max out
[in,out]	max_loc_vals	array values at location of local max in, and at location of global max out

◆ cs_parall_min()

static void cs_parall_min	(	int	n,
		cs_datatype_t	datatype,
		void *	val
	)

inlinestatic

Minimum values of a given datatype on all default communicator processes.

Parameters

[in]	n	number of values
[in]	datatype	matching Code_Saturne datatype
[in,out]	val	local minimum in, global minimum out (size: n)

◆ cs_parall_min_id_rank_r()

void cs_parall_min_id_rank_r	(	cs_lnum_t *	elt_id,
		int *	rank_id,
		cs_real_t	val
	)

Given an (id, rank, value) tuple, return the local id and rank corresponding to the global minimum value.

Parameters

[in,out]	elt_id	element id for which the value is the smallest (local in, global out)
[in,out]	rank_id	rank id for which the value is the smallest (local in, global out)
[in]	val	associated local minimum value

◆ cs_parall_min_loc_vals()

void cs_parall_min_loc_vals	(	int	n,
		cs_real_t *	min,
		cs_real_t	min_loc_vals[]
	)

Minimum value of a real and the value of related array on all default communicator processes.

Parameters

[in]	n	size of the related array
[in,out]	min	local min in, global min out
[in,out]	min_loc_vals	array values at location of local min in, and at location of global min out

◆ cs_parall_set_min_coll_buf_size()

void cs_parall_set_min_coll_buf_size ( size_t buffer_size )

Define minimum recommended scatter or gather buffer size.

This is used by some internal part to block or scatter/gather algorithms, so as to allow I/O buffer size tuning.

Parameters

[in] buffer_size minimum recommended part to block or gather buffer size (in bytes)

◆ cs_parall_sum()

static void cs_parall_sum	(	int	n,
		cs_datatype_t	datatype,
		void *	val
	)

inlinestatic

Sum values of a given datatype on all default communicator processes.

Parameters

[in]	n	number of values
[in]	datatype	matching Code_Saturne datatype
[in,out]	val	local sum in, global sum out (size: n)

◆ CS_PROCF()

void CS_PROCF	(	parhis	,
		PARHIS
	)

Variable Documentation

◆ ndrang

void cs_int_t* ndrang

◆ var

void cs_int_t cs_real_t var[]

◆ varcap

void cs_int_t cs_real_t cs_real_t* varcap

Functions

Variables

Function Documentation

◆ cs_parall_allgather_r()

◆ cs_parall_bcast()

◆ cs_parall_counter()

◆ cs_parall_counter_max()

◆ cs_parall_get_min_coll_buf_size()

◆ cs_parall_max()

◆ cs_parall_max_loc_vals()

◆ cs_parall_min()

◆ cs_parall_min_id_rank_r()

◆ cs_parall_min_loc_vals()

◆ cs_parall_set_min_coll_buf_size()

◆ cs_parall_sum()

◆ CS_PROCF()

Variable Documentation

◆ ndrang

◆ var

◆ varcap