void petscSetupDM (NonlinearSystem & nl) {
#if !PETSC_VERSION_LESS_THAN(3,3,0)
PetscErrorCode ierr;
// Initialize the part of the DM package that's packaged with Moose; in the PETSc source tree this call would be in DMInitializePackage()
ierr = DMMooseRegisterAll();
CHKERRABORT(nl.comm().get(),ierr);
// Create and set up the DM that will consume the split options and deal with block matrices.
PetscNonlinearSolver<Number> *petsc_solver = dynamic_cast<PetscNonlinearSolver<Number> *>(nl.sys().nonlinear_solver.get());
SNES snes = petsc_solver->snes();
/* FIXME: reset the DM, do not recreate it anew every time? */
DM dm = PETSC_NULL;
ierr = DMCreateMoose(nl.comm().get(), nl, &dm);
CHKERRABORT(nl.comm().get(),ierr);
ierr = DMSetFromOptions(dm);
CHKERRABORT(nl.comm().get(),ierr);
ierr = DMSetUp(dm);
CHKERRABORT(nl.comm().get(),ierr);
ierr = SNESSetDM(snes,dm);
CHKERRABORT(nl.comm().get(),ierr);
ierr = DMDestroy(&dm);
CHKERRABORT(nl.comm().get(),ierr);
ierr = SNESSetUpdate(snes,SNESUpdateDMMoose);
CHKERRABORT(nl.comm().get(),ierr);
#endif
}
void
petscSetupDM (NonlinearSystem & nl) {
#if !PETSC_VERSION_LESS_THAN(3,3,0)
PetscErrorCode ierr;
PetscBool ismoose;
DM dm = PETSC_NULL;
// Initialize the part of the DM package that's packaged with Moose; in the PETSc source tree this call would be in DMInitializePackage()
ierr = DMMooseRegisterAll();
CHKERRABORT(nl.comm().get(),ierr);
// Create and set up the DM that will consume the split options and deal with block matrices.
PetscNonlinearSolver<Number> *petsc_solver = dynamic_cast<PetscNonlinearSolver<Number> *>(nl.sys().nonlinear_solver.get());
SNES snes = petsc_solver->snes();
// if there exists a DMMoose object, not to recreate a new one
ierr = SNESGetDM(snes, &dm);
CHKERRABORT(nl.comm().get(), ierr);
if (dm)
{
ierr = PetscObjectTypeCompare((PetscObject)dm, DMMOOSE, &ismoose);
CHKERRABORT(nl.comm().get(), ierr);
if (ismoose)
return;
}
ierr = DMCreateMoose(nl.comm().get(), nl, &dm);
CHKERRABORT(nl.comm().get(),ierr);
ierr = DMSetFromOptions(dm);
CHKERRABORT(nl.comm().get(),ierr);
ierr = DMSetUp(dm);
CHKERRABORT(nl.comm().get(),ierr);
ierr = SNESSetDM(snes,dm);
CHKERRABORT(nl.comm().get(),ierr);
ierr = DMDestroy(&dm);
CHKERRABORT(nl.comm().get(),ierr);
// We temporarily comment out this updating function because
// we lack an approach to check if the problem
// structure has been changed from the last iteration.
// The indices will be rebuilt for every timestep.
// TODO: figure out a way to check the structure changes of the
// matrix
// ierr = SNESSetUpdate(snes,SNESUpdateDMMoose);
// CHKERRABORT(nl.comm().get(),ierr);
#endif
}