PCPatchSetDiscretisationInfo#

Provide the per-subspace discretisation information required by a PCPATCH preconditioner to build patch problems

Synopsis#

#include "petscpc.h" 
#include "petscmat.h" 
PetscErrorCode PCPatchSetDiscretisationInfo(PC pc, PetscInt nsubspaces, DM dms[], const IS isets[], PetscInt dofsPerCell[], const PetscInt **cellDofMap, PetscInt numGhostBcs, const PetscInt ghostBcDofs[], PetscInt numGlobalBcs, const PetscInt globalBcDofs[])

Logically Collective

Input Parameters#

pc - the PCPATCH preconditioner
nsubspaces - the number of discretisation subspaces (e.g. fields)
dms - array of length nsubspaces of DMs, one per subspace, from which the local sections and section PetscSFs are obtained
isets - array of length nsubspaces giving the ISs mapping subspace DoFs to DoFs in the full local mixed space
dofsPerCell - array of length nsubspaces giving the number of DoFs per cell for each subspace
cellDofMap - array of length nsubspaces; entry i is a cell-to-DoF map (array) of length (cEnd - cStart) * dofsPerCell[i]
numGhostBcs - number of ghost (off-process) boundary-condition dofs
ghostBcDofs - array of length numGhostBcs of the ghost boundary-condition dof indices
numGlobalBcs - number of global boundary-condition dofs
globalBcDofs - array of length numGlobalBcs of the global boundary-condition dof indices

Note#

The isets must together index each degree of freedom of the full local space exactly once; the size of that space is taken to be the sum of their local sizes.

Level#

advanced

Location#

src/ksp/pc/impls/patch/pcpatch.c

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