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[], PetscInt bs[], PetscInt nodesPerCell[], const PetscInt **cellNodeMap, const PetscInt subspaceOffsets[], PetscInt numGhostBcs, const PetscInt ghostBcNodes[], PetscInt numGlobalBcs, const PetscInt globalBcNodes[])

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

• bs - array of length nsubspaces giving the block size of each subspace

• nodesPerCell - array of length nsubspaces giving the number of nodes per cell for each subspace

• cellNodeMap - array of length nsubspaces; entry i is a cell-to-node map (array) of length (cEnd - cStart) * nodesPerCell[i]

• subspaceOffsets - array of length nsubspaces + 1 giving the starting global dof offset of each subspace

• numGhostBcs - number of ghost (off-process) boundary-condition dofs

• ghostBcNodes - array of length numGhostBcs of the ghost boundary-condition dof indices

• numGlobalBcs - number of global boundary-condition dofs

• globalBcNodes - array of length numGlobalBcs of the global boundary-condition dof indices

See Also

KSP: Linear System Solvers, PCPATCH, PCPatchSetComputeOperator(), PCPatchSetComputeFunction()

Level

advanced

Location

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

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Index of all PC routines
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