PetscSectionCreateGlobalSectionCensored#

Create a PetscSection describing the globallayout using a local (sequential) PetscSection on each MPI process and an PetscSF describing the section point overlap.

Synopsis#

#include "petscsection.h"   
PetscErrorCode PetscSectionCreateGlobalSectionCensored(PetscSection s, PetscSF sf, PetscBool includeConstraints, PetscInt numExcludes, const PetscInt excludes[], PetscSection *gsection)

Input Parameters#

  • s - The PetscSection for the local field layout

  • sf - The PetscSF describing parallel layout of the section points

  • includeConstraints - By default this is PETSC_FALSE, meaning that the global vector will not possess constrained dofs

  • numExcludes - The number of exclusion ranges, this must have the same value on all MPI processes

  • excludes - An array [start_0, end_0, start_1, end_1, …] where there are numExcludes pairs and must have the same values on all MPI processes

Output Parameter#

Notes#

On each MPI process gsection inherits the chart of the s on that process.

This sets negative sizes and offsets to points not owned by this process as defined by sf but that are within the local value of the chart of gsection. In those locations the value of size is -(size+1) and the value of the offset on the remote process is -(off+1).

This routine augments PetscSectionCreateGlobalSection() by allowing one to exclude certain ranges in the chart of the PetscSection

Developer Notes#

This is a terrible function name

See Also#

PetscSection, PetscSection, PetscSectionCreate()

Level#

advanced

Location#

src/vec/is/section/interface/section.c

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