static PetscErrorCode SNESCompositeAddSNES_Composite(SNES snes,SNESType type)
{
SNES_Composite *jac;
SNES_CompositeLink next,ilink;
PetscErrorCode ierr;
PetscInt cnt = 0;
const char *prefix;
char newprefix[20];
DM dm;
PetscFunctionBegin;
ierr = PetscNewLog(snes,&ilink);CHKERRQ(ierr);
ilink->next = 0;
ierr = SNESCreate(PetscObjectComm((PetscObject)snes),&ilink->snes);CHKERRQ(ierr);
ierr = PetscLogObjectParent((PetscObject)snes,(PetscObject)ilink->snes);CHKERRQ(ierr);
ierr = SNESGetDM(snes,&dm);CHKERRQ(ierr);
ierr = SNESSetDM(ilink->snes,dm);CHKERRQ(ierr);
ierr = SNESSetTolerances(ilink->snes,ilink->snes->abstol,ilink->snes->rtol,ilink->snes->stol,1,ilink->snes->max_funcs);CHKERRQ(ierr);
ierr = PetscObjectCopyFortranFunctionPointers((PetscObject)snes,(PetscObject)ilink->snes);CHKERRQ(ierr);
jac = (SNES_Composite*)snes->data;
next = jac->head;
if (!next) {
jac->head = ilink;
ilink->previous = NULL;
} else {
cnt++;
while (next->next) {
next = next->next;
cnt++;
}
next->next = ilink;
ilink->previous = next;
}
ierr = SNESGetOptionsPrefix(snes,&prefix);CHKERRQ(ierr);
ierr = SNESSetOptionsPrefix(ilink->snes,prefix);CHKERRQ(ierr);
sprintf(newprefix,"sub_%d_",(int)cnt);
ierr = SNESAppendOptionsPrefix(ilink->snes,newprefix);CHKERRQ(ierr);
ierr = PetscObjectIncrementTabLevel((PetscObject)ilink->snes,(PetscObject)snes,1);CHKERRQ(ierr);
ierr = SNESSetType(ilink->snes,type);CHKERRQ(ierr);
ierr = SNESSetNormSchedule(ilink->snes, SNES_NORM_FINAL_ONLY);CHKERRQ(ierr);
ilink->dmp = 1.0;
jac->nsnes++;
PetscFunctionReturn(0);
}
PetscErrorCode SNESSetUp_FAS(SNES snes)
{
SNES_FAS *fas = (SNES_FAS*) snes->data;
PetscErrorCode ierr;
PetscInt dm_levels;
Vec vec_sol, vec_func, vec_sol_update, vec_rhs; /* preserve these if they're set through the reset */
SNES next;
PetscBool isFine;
SNESLineSearch linesearch;
SNESLineSearch slinesearch;
void *lsprectx,*lspostctx;
PetscErrorCode (*precheck)(SNESLineSearch,Vec,Vec,PetscBool*,void*);
PetscErrorCode (*postcheck)(SNESLineSearch,Vec,Vec,Vec,PetscBool*,PetscBool*,void*);
PetscFunctionBegin;
ierr = SNESFASCycleIsFine(snes, &isFine);CHKERRQ(ierr);
if (fas->usedmfornumberoflevels && isFine) {
ierr = DMGetRefineLevel(snes->dm,&dm_levels);CHKERRQ(ierr);
dm_levels++;
if (dm_levels > fas->levels) {
/* we don't want the solution and func vectors to be destroyed in the SNESReset when it's called in SNESFASSetLevels_FAS*/
vec_sol = snes->vec_sol;
vec_func = snes->vec_func;
vec_sol_update = snes->vec_sol_update;
vec_rhs = snes->vec_rhs;
snes->vec_sol = NULL;
snes->vec_func = NULL;
snes->vec_sol_update = NULL;
snes->vec_rhs = NULL;
/* reset the number of levels */
ierr = SNESFASSetLevels(snes,dm_levels,NULL);CHKERRQ(ierr);
ierr = SNESSetFromOptions(snes);CHKERRQ(ierr);
snes->vec_sol = vec_sol;
snes->vec_func = vec_func;
snes->vec_rhs = vec_rhs;
snes->vec_sol_update = vec_sol_update;
}
}
ierr = SNESFASCycleGetCorrection(snes, &next);CHKERRQ(ierr);
if (!isFine) snes->gridsequence = 0; /* no grid sequencing inside the multigrid hierarchy! */
ierr = SNESSetWorkVecs(snes, 2);CHKERRQ(ierr); /* work vectors used for intergrid transfers */
/* set up the smoothers if they haven't already been set up */
if (!fas->smoothd) {
ierr = SNESFASCycleCreateSmoother_Private(snes, &fas->smoothd);CHKERRQ(ierr);
}
if (snes->dm) {
/* set the smoother DMs properly */
if (fas->smoothu) ierr = SNESSetDM(fas->smoothu, snes->dm);CHKERRQ(ierr);
ierr = SNESSetDM(fas->smoothd, snes->dm);CHKERRQ(ierr);
/* construct EVERYTHING from the DM -- including the progressive set of smoothers */
if (next) {
/* for now -- assume the DM and the evaluation functions have been set externally */
if (!next->dm) {
ierr = DMCoarsen(snes->dm, PetscObjectComm((PetscObject)next), &next->dm);CHKERRQ(ierr);
ierr = SNESSetDM(next, next->dm);CHKERRQ(ierr);
}
/* set the interpolation and restriction from the DM */
if (!fas->interpolate) {
ierr = DMCreateInterpolation(next->dm, snes->dm, &fas->interpolate, &fas->rscale);CHKERRQ(ierr);
if (!fas->restrct) {
ierr = PetscObjectReference((PetscObject)fas->interpolate);CHKERRQ(ierr);
fas->restrct = fas->interpolate;
}
}
/* set the injection from the DM */
if (!fas->inject) {
ierr = DMCreateInjection(next->dm, snes->dm, &fas->inject);CHKERRQ(ierr);
}
}
}
/*pass the smoother, function, and jacobian up to the next level if it's not user set already */
if (fas->galerkin) {
if (next) {
ierr = SNESSetFunction(next, NULL, SNESFASGalerkinDefaultFunction, next);CHKERRQ(ierr);
}
if (fas->smoothd && fas->level != fas->levels - 1) {
ierr = SNESSetFunction(fas->smoothd, NULL, SNESFASGalerkinDefaultFunction, snes);CHKERRQ(ierr);
}
if (fas->smoothu && fas->level != fas->levels - 1) {
ierr = SNESSetFunction(fas->smoothu, NULL, SNESFASGalerkinDefaultFunction, snes);CHKERRQ(ierr);
}
}
/* sets the down (pre) smoother's default norm and sets it from options */
if (fas->smoothd) {
if (fas->level == 0 && fas->levels != 1) {
ierr = SNESSetNormSchedule(fas->smoothd, SNES_NORM_NONE);CHKERRQ(ierr);
} else {
ierr = SNESSetNormSchedule(fas->smoothd, SNES_NORM_FINAL_ONLY);CHKERRQ(ierr);
}
ierr = PetscObjectCopyFortranFunctionPointers((PetscObject)snes, (PetscObject)fas->smoothd);CHKERRQ(ierr);
ierr = SNESSetFromOptions(fas->smoothd);CHKERRQ(ierr);
ierr = SNESGetLineSearch(snes,&linesearch);CHKERRQ(ierr);
ierr = SNESGetLineSearch(fas->smoothd,&slinesearch);CHKERRQ(ierr);
ierr = SNESLineSearchGetPreCheck(linesearch,&precheck,&lsprectx);CHKERRQ(ierr);
ierr = SNESLineSearchGetPostCheck(linesearch,&postcheck,&lspostctx);CHKERRQ(ierr);
ierr = SNESLineSearchSetPreCheck(slinesearch,precheck,lsprectx);CHKERRQ(ierr);
ierr = SNESLineSearchSetPostCheck(slinesearch,postcheck,lspostctx);CHKERRQ(ierr);
ierr = PetscObjectCopyFortranFunctionPointers((PetscObject)linesearch, (PetscObject)slinesearch);CHKERRQ(ierr);
fas->smoothd->vec_sol = snes->vec_sol;
ierr = PetscObjectReference((PetscObject)snes->vec_sol);CHKERRQ(ierr);
fas->smoothd->vec_sol_update = snes->vec_sol_update;
ierr = PetscObjectReference((PetscObject)snes->vec_sol_update);CHKERRQ(ierr);
fas->smoothd->vec_func = snes->vec_func;
ierr = PetscObjectReference((PetscObject)snes->vec_func);CHKERRQ(ierr);
if (fas->eventsmoothsetup) {ierr = PetscLogEventBegin(fas->eventsmoothsetup,0,0,0,0);CHKERRQ(ierr);}
ierr = SNESSetUp(fas->smoothd);CHKERRQ(ierr);
if (fas->eventsmoothsetup) {ierr = PetscLogEventEnd(fas->eventsmoothsetup,0,0,0,0);CHKERRQ(ierr);}
}
/* sets the up (post) smoother's default norm and sets it from options */
if (fas->smoothu) {
if (fas->level != fas->levels - 1) {
ierr = SNESSetNormSchedule(fas->smoothu, SNES_NORM_NONE);CHKERRQ(ierr);
} else {
ierr = SNESSetNormSchedule(fas->smoothu, SNES_NORM_FINAL_ONLY);CHKERRQ(ierr);
}
ierr = PetscObjectCopyFortranFunctionPointers((PetscObject)snes, (PetscObject)fas->smoothu);CHKERRQ(ierr);
ierr = SNESSetFromOptions(fas->smoothu);CHKERRQ(ierr);
ierr = SNESGetLineSearch(snes,&linesearch);CHKERRQ(ierr);
ierr = SNESGetLineSearch(fas->smoothu,&slinesearch);CHKERRQ(ierr);
ierr = SNESLineSearchGetPreCheck(linesearch,&precheck,&lsprectx);CHKERRQ(ierr);
ierr = SNESLineSearchGetPostCheck(linesearch,&postcheck,&lspostctx);CHKERRQ(ierr);
ierr = SNESLineSearchSetPreCheck(slinesearch,precheck,lsprectx);CHKERRQ(ierr);
ierr = SNESLineSearchSetPostCheck(slinesearch,postcheck,lspostctx);CHKERRQ(ierr);
ierr = PetscObjectCopyFortranFunctionPointers((PetscObject)linesearch, (PetscObject)slinesearch);CHKERRQ(ierr);
fas->smoothu->vec_sol = snes->vec_sol;
ierr = PetscObjectReference((PetscObject)snes->vec_sol);CHKERRQ(ierr);
fas->smoothu->vec_sol_update = snes->vec_sol_update;
ierr = PetscObjectReference((PetscObject)snes->vec_sol_update);CHKERRQ(ierr);
fas->smoothu->vec_func = snes->vec_func;
ierr = PetscObjectReference((PetscObject)snes->vec_func);CHKERRQ(ierr);
if (fas->eventsmoothsetup) {ierr = PetscLogEventBegin(fas->eventsmoothsetup,0,0,0,0);CHKERRQ(ierr);}
ierr = SNESSetUp(fas->smoothu);CHKERRQ(ierr);
if (fas->eventsmoothsetup) {ierr = PetscLogEventEnd(fas->eventsmoothsetup,0,0,0,0);CHKERRQ(ierr);}
}
if (next) {
/* gotta set up the solution vector for this to work */
if (!next->vec_sol) {ierr = SNESFASCreateCoarseVec(snes,&next->vec_sol);CHKERRQ(ierr);}
if (!next->vec_rhs) {ierr = SNESFASCreateCoarseVec(snes,&next->vec_rhs);CHKERRQ(ierr);}
ierr = PetscObjectCopyFortranFunctionPointers((PetscObject)snes, (PetscObject)next);CHKERRQ(ierr);
ierr = SNESGetLineSearch(snes,&linesearch);CHKERRQ(ierr);
ierr = SNESGetLineSearch(fas->next,&slinesearch);CHKERRQ(ierr);
ierr = SNESLineSearchGetPreCheck(linesearch,&precheck,&lsprectx);CHKERRQ(ierr);
ierr = SNESLineSearchGetPostCheck(linesearch,&postcheck,&lspostctx);CHKERRQ(ierr);
ierr = SNESLineSearchSetPreCheck(slinesearch,precheck,lsprectx);CHKERRQ(ierr);
ierr = SNESLineSearchSetPostCheck(slinesearch,postcheck,lspostctx);CHKERRQ(ierr);
ierr = PetscObjectCopyFortranFunctionPointers((PetscObject)linesearch, (PetscObject)slinesearch);CHKERRQ(ierr);
ierr = SNESSetUp(next);CHKERRQ(ierr);
}
/* setup FAS work vectors */
if (fas->galerkin) {
ierr = VecDuplicate(snes->vec_sol, &fas->Xg);CHKERRQ(ierr);
ierr = VecDuplicate(snes->vec_sol, &fas->Fg);CHKERRQ(ierr);
}
PetscFunctionReturn(0);
}
