Parallel Approximation

Functions
int	appr_get_ent_owner (int Field_id, int Ent_type, int Ent_id)
int	appr_get_ent_id_at_owner (int Field_id, int Ent_type, int Ent_id)
int	appr_adjust_field (int Field_id)
int	appr_init_exchange_tables (int Nr_proc, int My_proc_id, int Field_id, int Nreq_offset, int Nreq, int Nr_levels)
int	appr_create_exchange_tables (int Table_index, int Level_id, int Nr_dof_ent, int *L_dof_ent_type, int *L_dof_ent_id, int *L_bl_nrdof, int *L_bl_posg, int *L_elem_to_bl, int *L_face_to_bl, int *L_edge_to_bl, int *L_vert_to_bl)
int	appr_exchange_dofs (int Table_index, int Level_id, double *Vec_dofs)
double	appr_sol_vec_norm (int Table_index, int Level_id, int Nrdof, double *Vector)
double	appr_sol_sc_prod (int Table_index, int Level_id, int Nrdof, double *Vector1, double *Vector2)
int	appr_get_nr_dofs_owned (int Table_index)
int	appr_free_exchange_tables (int Table_index)

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Function Documentation

int appr_adjust_field

(

int

Field_id

)

--------------------------------------------------------- appr_adjust_field - to adjust DOFs after domain decomposition ---------------------------------------------------------

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int appr_create_exchange_tables	(	int	Table_index,
		int	Level_id,
		int	Nr_dof_ent,
		int *	L_dof_ent_type,
		int *	L_dof_ent_id,
		int *	L_bl_nrdof,
		int *	L_bl_posg,
		int *	L_elem_to_bl,
		int *	L_face_to_bl,
		int *	L_edge_to_bl,
		int *	L_vert_to_bl
	)

-------------------------------------------------------- appr_create_exchange_tables - to create lists of dofs exchanged between pairs of processors. REMARK. a simplified setting is used, where dof structures are modified (updated) only by their owners and data send to other processors. Thus both exchange1 and exchange2 groups of arrays are empty and only send and receive arrays are filled. In the routine appr_create_exchange_tables each processor constructs lists of dof structures needed for solver (dofrecv group) and sends them to owning processors. It also receives from other processors requests for owned dof structures needed by other processors (dofsend group). ---------------------------------------------------------

Parameters:

	Table_index	returns: >=0 -success code, <0 -error code
	Nr_dof_ent	in: level ID
	L_dof_ent_type	in: number of DOF entities in the level all four subsequent arrays are indexed by block IDs with 1(!!!) offset
	L_dof_ent_id	in: list of DOF entities associated with DOF blocks
	L_bl_nrdof	in: list of DOF entities associated with DOF blocks
	L_bl_posg	in: list of nrdofs for each dof block
	L_elem_to_bl	in: list of positions within the global vector of dofs for each dof block
	L_face_to_bl	in: list of DOF blocks associated with DOF entities
	L_edge_to_bl	in: list of DOF blocks associated with DOF entities
	L_vert_to_bl	in: list of DOF blocks associated with DOF entities in: list of DOF blocks associated with DOF entities

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int appr_exchange_dofs	(	int	Table_index,
		int	Level_id,
		double *	Vec_dofs
	)

-------------------------------------------------------- appr_exchange_dofs - to exchange dofs between processors ---------------------------------------------------------

Parameters:

Vec_dofs

in: level ID in: vector of dofs to be exchanged

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int appr_free_exchange_tables

(

int

Table_index

)

-------------------------------------------------------- appr_free_exchange_tables - to free data structure related to exchange of dofs ---------------------------------------------------------

Parameters:

Table_index

returns: >=0 -success code, <0 -error code

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int appr_get_ent_id_at_owner	(	int	Field_id,
		int	Ent_type,
		int	Ent_id
	)

-------------------------------------------------------- appr_get_ent_id_at_owner ---------------------------------------------------------

Parameters:

	Field_id	returns: >=0 -success code - entity local ID, <0 -error code
	Ent_type	in: approximation field ID
	Ent_id	in: type of mesh entity in: mesh entity ID

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int appr_get_ent_owner	(	int	Field_id,
		int	Ent_type,
		int	Ent_id
	)

-------------------------------------------------------- appr_get_ent_owner - to return owning process(or) ID ---------------------------------------------------------

Parameters:

	Field_id	returns: >=0 -success code - owner ID, <0 -error code
	Ent_type	in: approximation field ID
	Ent_id	in: type of mesh entity in: mesh entity ID

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int appr_get_nr_dofs_owned

(

int

Table_index

)

-------------------------------------------------------- appr_get_nr_dofs_owned - utility to calculate the number of dofs owned at the finest level ---------------------------------------------------------

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int appr_init_exchange_tables	(	int	Nr_proc,
		int	My_proc_id,
		int	Field_id,
		int	Nreq_offset,
		int	Nreq,
		int	Nr_levels
	)

-------------------------------------------------------- appr_init_exchange_tables - to initialize data structure related to exchange of dofs ---------------------------------------------------------

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double appr_sol_sc_prod	(	int	Table_index,
		int	Level_id,
		int	Nrdof,
		double *	Vector1,
		double *	Vector2
	)

-------------------------------------------------------- appr_sol_sc_prod - to compute a scalar product of two global vectors ---------------------------------------------------------

Parameters:

	Table_index	retruns: scalar product of Vector1 and Vector2
	Nrdof	in: level ID
	Vector1	in: number of vector components
	Vector2	in: local part of global Vector in: local part of global Vector

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double appr_sol_vec_norm	(	int	Table_index,
		int	Level_id,
		int	Nrdof,
		double *	Vector
	)

-------------------------------------------------------- appr_sol_vec_norm - to compute a norm of global vector in parallel ---------------------------------------------------------

Parameters:

	Table_index	returns: L2 norm of global Vector
	Nrdof	in: level ID
	Vector	in: number of vector components in: local part of global Vector

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