PetscPartitionerPartition#

Partition a graph

Synopsis#

#include "petscpartitioner.h" 
PetscErrorCode PetscPartitionerPartition(PetscPartitioner part, PetscInt nparts, PetscInt numVertices, PetscInt start[], PetscInt adjacency[], PetscSection vertexSection, PetscSection targetSection, PetscSection partSection, IS *partition)

Collective

Input Parameters#

  • part - The PetscPartitioner

  • nparts - Number of partitions

  • numVertices - Number of vertices in the local part of the graph

  • start - row pointers for the local part of the graph (CSR style)

  • adjacency - adjacency list (CSR style)

  • vertexSection - PetscSection describing the absolute weight of each local vertex (can be NULL)

  • targetSection - PetscSection describing the absolute weight of each partition (can be NULL)

Output Parameters#

  • partSection - The PetscSection giving the division of points by partition

  • partition - The list of points by partition

Options Databasen Keys#

  • -petscpartitioner_view - View the partitioner information

  • -petscpartitioner_view_graph - View the graph we are partitioning

Notes#

The chart of the vertexSection (if present) must contain [0,numVertices), with the number of dofs in the section specifying the absolute weight for each vertex. The chart of the targetSection (if present) must contain [0,nparts), with the number of dofs in the section specifying the absolute weight for each partition. This information must be the same across processes, PETSc does not check it.

See Also#

PetscPartitionerCreate(), PetscPartitionerSetType(), PetscSectionCreate(), PetscSectionSetChart(), PetscSectionSetDof()

Level#

developer

Location#

src/dm/partitioner/interface/partitioner.c

Implementations#

PetscPartitionerPartition_Chaco() in src/dm/partitioner/impls/chaco/partchaco.c
PetscPartitionerPartition_Gather() in src/dm/partitioner/impls/gather/partgather.c
PetscPartitionerPartition_MatPartitioning() in src/dm/partitioner/impls/matpart/partmatpart.c
PetscPartitionerPartition_ParMetis() in src/dm/partitioner/impls/parmetis/partparmetis.c
PetscPartitionerPartition_PTScotch() in src/dm/partitioner/impls/ptscotch/partptscotch.c
PetscPartitionerPartition_Shell() in src/dm/partitioner/impls/shell/partshell.c
PetscPartitionerPartition_Simple() in src/dm/partitioner/impls/simple/partsimple.c

Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages