1: /*
  2:      Full multigrid using either additive or multiplicative V or W cycle
  3: */
  4: #include <petsc/private/pcmgimpl.h>

  6: extern PetscErrorCode PCMGMCycle_Private(PC,PC_MG_Levels**,PCRichardsonConvergedReason*);

 10: PetscErrorCode PCMGFCycle_Private(PC pc,PC_MG_Levels **mglevels)
 11: {
 13:   PetscInt       i,l = mglevels[0]->levels;

 16:   /* restrict the RHS through all levels to coarsest. */
 17:   for (i=l-1; i>0; i--) {
 18:     if (mglevels[i]->eventinterprestrict) {PetscLogEventBegin(mglevels[i]->eventinterprestrict,0,0,0,0);}
 19:     MatRestrict(mglevels[i]->restrct,mglevels[i]->b,mglevels[i-1]->b);
 20:     if (mglevels[i]->eventinterprestrict) {PetscLogEventEnd(mglevels[i]->eventinterprestrict,0,0,0,0);}
 21:   }

 23:   /* work our way up through the levels */
 24:   VecSet(mglevels[0]->x,0.0);
 25:   for (i=0; i<l-1; i++) {
 26:     PCMGMCycle_Private(pc,&mglevels[i],NULL);
 27:     if (mglevels[i+1]->eventinterprestrict) {PetscLogEventBegin(mglevels[i+1]->eventinterprestrict,0,0,0,0);}
 28:     MatInterpolate(mglevels[i+1]->interpolate,mglevels[i]->x,mglevels[i+1]->x);
 29:     if (mglevels[i+1]->eventinterprestrict) {PetscLogEventEnd(mglevels[i+1]->eventinterprestrict,0,0,0,0);}
 30:   }
 31:   PCMGMCycle_Private(pc,&mglevels[l-1],NULL);
 32:   return(0);
 33: }

 37: PetscErrorCode PCMGKCycle_Private(PC pc,PC_MG_Levels **mglevels)
 38: {
 40:   PetscInt       i,l = mglevels[0]->levels;

 43:   /* restrict the RHS through all levels to coarsest. */
 44:   for (i=l-1; i>0; i--) {
 45:     if (mglevels[i]->eventinterprestrict) {PetscLogEventBegin(mglevels[i]->eventinterprestrict,0,0,0,0);}
 46:     MatRestrict(mglevels[i]->restrct,mglevels[i]->b,mglevels[i-1]->b);
 47:     if (mglevels[i]->eventinterprestrict) {PetscLogEventEnd(mglevels[i]->eventinterprestrict,0,0,0,0);}
 48:   }

 50:   /* work our way up through the levels */
 51:   VecSet(mglevels[0]->x,0.0);
 52:   for (i=0; i<l-1; i++) {
 53:     if (mglevels[i]->eventsmoothsolve) {PetscLogEventBegin(mglevels[i]->eventsmoothsolve,0,0,0,0);}
 54:     KSPSolve(mglevels[i]->smoothd,mglevels[i]->b,mglevels[i]->x);
 55:     if (mglevels[i]->eventsmoothsolve) {PetscLogEventEnd(mglevels[i]->eventsmoothsolve,0,0,0,0);}
 56:     if (mglevels[i+1]->eventinterprestrict) {PetscLogEventBegin(mglevels[i+1]->eventinterprestrict,0,0,0,0);}
 57:     MatInterpolate(mglevels[i+1]->interpolate,mglevels[i]->x,mglevels[i+1]->x);
 58:     if (mglevels[i+1]->eventinterprestrict) {PetscLogEventEnd(mglevels[i+1]->eventinterprestrict,0,0,0,0);}
 59:   }
 60:   if (mglevels[l-1]->eventsmoothsolve) {PetscLogEventBegin(mglevels[l-1]->eventsmoothsolve,0,0,0,0);}
 61:   KSPSolve(mglevels[l-1]->smoothd,mglevels[l-1]->b,mglevels[l-1]->x);
 62:   if (mglevels[l-1]->eventsmoothsolve) {PetscLogEventEnd(mglevels[l-1]->eventsmoothsolve,0,0,0,0);}
 63:   return(0);
 64: }