#include "common/DataTypes.hpp"
#include "common/MpiWrapper.hpp"

Typedefs
using	geos::pmet_idx_t = int64_t
	Typedef to allow us to specify required parmetis integer type.

Functions
ArrayOfArrays< pmet_idx_t, pmet_idx_t >	geos::parmetis::meshToDual (ArrayOfArraysView< pmet_idx_t const, pmet_idx_t > const &elemToNodes, arrayView1d< pmet_idx_t const > const &elemDist, MPI_Comm comm, int const minCommonNodes)
	Convert a element-node mesh map into a dual (element-element) graph. More...

array1d< pmet_idx_t >	geos::parmetis::partition (ArrayOfArraysView< pmet_idx_t const, pmet_idx_t > const &graph, arrayView1d< pmet_idx_t const > const &vertDist, pmet_idx_t const numParts, MPI_Comm comm, int const numRefinements)
	Partition a mesh according to its dual graph. More...

Function Documentation

◆ meshToDual()

ArrayOfArrays< pmet_idx_t, pmet_idx_t > geos::parmetis::meshToDual	(	ArrayOfArraysView< pmet_idx_t const, pmet_idx_t > const &	elemToNodes,
		arrayView1d< pmet_idx_t const > const &	elemDist,
		MPI_Comm	comm,
		int const	minCommonNodes
	)

Convert a element-node mesh map into a dual (element-element) graph.

Parameters

elemToNodes	the input mesh represented by its elem-node map
elemDist	the parallel distribution of elements: element index offset on each rank
comm	the MPI communicator of processes to partition over
minCommonNodes	minimum number of shared nodes to create an graph edge

Returns: a graph with an edge for every pair of elements that share at least minCommonNodes nodes; target element indices are global with respect to offsets in elemDist.

Note: elemDist must be a comm-wide exclusive scan of elemToNodes.size(); the user may compute it once and reuse in a subsequent call to partition().

array1d< pmet_idx_t > geos::parmetis::partition	(	ArrayOfArraysView< pmet_idx_t const, pmet_idx_t > const &	graph,
		arrayView1d< pmet_idx_t const > const &	vertDist,
		pmet_idx_t const	numParts,
		MPI_Comm	comm,
		int const	numRefinements
	)

Partition a mesh according to its dual graph.

Parameters

graph	the input graph (edges of locally owned nodes)
vertDist	the parallel distribution of vertices: vertex index offset on each rank
numParts	target number of partitions
comm	the MPI communicator of processes to partition over
numRefinements	number of partition refinement iterations