oft_mesh_global Module Reference

Detailed Description

MPI constructs and subroutines for global operations.

MPI types for global mesh information

• Global Mesh indices
• Proc to proc linkage information

Functions to intialize the MPI structure

• Preform mesh decomposition and scatter
• Construct MPI linkage information

Author

Chris Hansen

Date

Spring 2010

Functions/Subroutines
subroutine	bmesh_global_init (self)
	Driver for global mesh initialization.
subroutine	bmesh_global_link (self, parent)
	Driver for global seam linkage construction.
subroutine	elinkage_from_parent (self, parent)
	Construct processor to processor edge linkage for stitching operations.
subroutine	mesh_global_decomp (self, part_meth)
	Perform mesh decomposition and local construction.
subroutine	mesh_global_elinkage (self)
	Construct processor to processor edge linkage for stitching operations.
subroutine	mesh_global_flinkage (self)
	Construct processor to processor face linkage for stitching operations.
subroutine	mesh_global_init (self)
	Driver for global mesh initialization.
subroutine	mesh_global_link (self)
	Driver for global seam linkage construction.
subroutine	mesh_global_partition (self, meshpart, part_meth)
	Perform mesh decomposition (METIS) and local construction.
subroutine	mesh_global_plinkage (self)
	Construct processor to processor point linkage for stitching operations.
subroutine	mesh_global_proccon (self, lptmp, np)
	Determine neighboring processors for MPI linkage.
subroutine	mesh_global_sync (self)
	Scatters base mesh information to all processors.
subroutine	plinkage_from_parent (self, parent)
	Construct processor to processor point linkage for stitching operations.
subroutine	smesh_global_init (self)
	Driver for global mesh initialization.

Function/Subroutine Documentation

bmesh_global_init()

subroutine bmesh_global_init

(

class(oft_mesh), intent(inout)

self

)

Driver for global mesh initialization.

Initialize global mesh enviroment

• Sync mesh information from proc 0 to all
• Set base global geometry counts, indices and boundary info
• Construct lowest level mesh

  Parameters

  [in,out]

  self

  Mesh object

bmesh_global_link()

subroutine bmesh_global_link	(	class(oft_bmesh), intent(inout)	self,
		class(oft_mesh), intent(inout), optional	parent
	)

Driver for global seam linkage construction.

Construct inter-processor linkage information

• Link seam points, edges and faces

  Parameters

  [in,out]	self	Mesh object
  [in,out]	parent	Parent volume mesh (if present)

elinkage_from_parent()

subroutine elinkage_from_parent	(	class(oft_bmesh), intent(inout)	self,
		class(oft_mesh), intent(inout)	parent
	)

Construct processor to processor edge linkage for stitching operations.

• Create linkage of boundary edges to other processors with orientation.
• Determine ownership for shared edges

  Parameters

  [in,out]	self	Mesh object
  [in,out]	parent	Parent volume mesh

mesh_global_decomp()

subroutine mesh_global_decomp	(	class(oft_amesh), intent(inout)	self,
		integer(i4), intent(in)	part_meth
	)

Perform mesh decomposition and local construction.

• Decompose global mesh
• Perform mesh construction of local domain

  Parameters

  [in,out]	self	Mesh object
  [in]	part_meth	Method to use for partitioning (see mesh_global_partition)

mesh_global_elinkage()

subroutine mesh_global_elinkage

(

class(oft_amesh), intent(inout)

self

)

Construct processor to processor edge linkage for stitching operations.

• Create linkage of boundary edges to other processors with orientation.
• Determine ownership for shared edges

  Parameters

  [in,out]

  self

  Mesh object

mesh_global_flinkage()

subroutine mesh_global_flinkage

(

class(oft_mesh), intent(inout)

self

)

Construct processor to processor face linkage for stitching operations.

• Create linkage of boundary faces to other processors.
• Determine ownership for shared faces
• Set global boundary face flag

  Parameters

  [in,out]

  self

  Mesh object

mesh_global_init()

subroutine mesh_global_init

(

class(oft_mesh), intent(inout)

self

)

Driver for global mesh initialization.

Initialize global mesh enviroment

• Sync mesh information from proc 0 to all
• Set base global geometry counts, indices and boundary info
• Construct lowest level mesh

  Parameters

  [in,out]

  self

  Mesh object

mesh_global_link()

subroutine mesh_global_link

(

class(oft_mesh), intent(inout)

self

)

Driver for global seam linkage construction.

Construct inter-processor linkage information

• Link seam points, edges and faces

  Parameters

  [in,out]

  self

  Mesh object

mesh_global_partition()

subroutine mesh_global_partition	(	class(oft_amesh), intent(inout)	self,
		integer(i4), dimension(:), intent(inout)	meshpart,
		integer(i4), intent(in)	part_meth
	)

Perform mesh decomposition (METIS) and local construction.

• Decompose domain of head task using METIS library.
• Scatter decomposition to all tasks.

Supported partition methods are:

• part_meth==1: Partition using METIS library
• 2 <= part_meth <= 4: Axial spatial partitioning along coordinate part_meth-1
• part_meth==5: Cylindrical spatial partitioning in azimuthal direction

  Parameters

  [in,out]	self	Mesh object
  [in,out]	meshpart	Partition flag [selfnc]
  [in]	part_meth	Method to use for partitioning

mesh_global_plinkage()

subroutine mesh_global_plinkage

(

class(oft_amesh), intent(inout)

self

)

Construct processor to processor point linkage for stitching operations.

• Create linkage of boundary points to other processors
• Determine ownership for shared points

  Parameters

  [in,out]

  self

  Mesh object

mesh_global_proccon()

subroutine mesh_global_proccon	(	class(oft_amesh), intent(inout)	self,
		integer(i4), dimension(np), intent(in)	lptmp,
		integer(i4), intent(in)	np
	)

Determine neighboring processors for MPI linkage.

Parameters

[in,out]	self	Mesh object
[in]	lptmp	List of global point indices from initialization
[in]	np	number of points

mesh_global_sync()

subroutine mesh_global_sync

(

class(oft_amesh), intent(inout)

self

)

Scatters base mesh information to all processors.

Scatters mesh information from head task to all other tasks using MPI_BCAST calls.

• Communicates base mesh information (np,nc,lc,r)

  Parameters

  [in,out]

  self

  Mesh object

plinkage_from_parent()

subroutine plinkage_from_parent	(	class(oft_bmesh), intent(inout)	self,
		class(oft_mesh), intent(inout)	parent
	)

Construct processor to processor point linkage for stitching operations.

• Create linkage of boundary points to other processors
• Determine ownership for shared points

  Parameters

  [in,out]	self	Mesh object
  [in,out]	parent	Parent volume mesh

smesh_global_init()

subroutine smesh_global_init

(

class(oft_bmesh), intent(inout)

self

)

Driver for global mesh initialization.

Initialize global mesh enviroment

• Sync mesh information from proc 0 to all
• Set base global geometry counts, indices and boundary info
• Construct lowest level mesh

  Parameters

  [in,out]

  self

  Mesh object