1dba47a55SKris Buschelman #define PETSCKSP_DLL 2dba47a55SKris Buschelman 34b9ad928SBarry Smith /* 44b9ad928SBarry Smith Additive Multigrid V Cycle routine 54b9ad928SBarry Smith */ 67c4f633dSBarry Smith #include "../src/ksp/pc/impls/mg/mgimpl.h" 74b9ad928SBarry Smith 84b9ad928SBarry Smith #undef __FUNCT__ 99dcbbd2bSBarry Smith #define __FUNCT__ "PCMGACycle_Private" 1031567311SBarry Smith PetscErrorCode PCMGACycle_Private(PC pc,PC_MG_Levels **mglevels) 114b9ad928SBarry Smith { 126849ba73SBarry Smith PetscErrorCode ierr; 13f3fbd535SBarry Smith PetscInt i,l = mglevels[0]->levels; 144b9ad928SBarry Smith 154b9ad928SBarry Smith PetscFunctionBegin; 164b9ad928SBarry Smith /* compute RHS on each level */ 174b9ad928SBarry Smith for (i=l-1; i>0; i--) { 18*63e6d426SJed Brown if (mglevels[i]->eventinterprestrict) {ierr = PetscLogEventBegin(mglevels[i]->eventinterprestrict,0,0,0,0);CHKERRQ(ierr);} 19f3fbd535SBarry Smith ierr = MatRestrict(mglevels[i]->restrct,mglevels[i]->b,mglevels[i-1]->b);CHKERRQ(ierr); 20*63e6d426SJed Brown if (mglevels[i]->eventinterprestrict) {ierr = PetscLogEventEnd(mglevels[i]->eventinterprestrict,0,0,0,0);CHKERRQ(ierr);} 214b9ad928SBarry Smith } 22a8c7a070SBarry Smith /* solve separately on each level */ 234b9ad928SBarry Smith for (i=0; i<l; i++) { 24f3fbd535SBarry Smith ierr = VecSet(mglevels[i]->x,0.0);CHKERRQ(ierr); 25*63e6d426SJed Brown if (mglevels[i]->eventsmoothsolve) {ierr = PetscLogEventBegin(mglevels[i]->eventsmoothsolve,0,0,0,0);CHKERRQ(ierr);} 26f3fbd535SBarry Smith ierr = KSPSolve(mglevels[i]->smoothd,mglevels[i]->b,mglevels[i]->x);CHKERRQ(ierr); 27*63e6d426SJed Brown if (mglevels[i]->eventsmoothsolve) {ierr = PetscLogEventEnd(mglevels[i]->eventsmoothsolve,0,0,0,0);CHKERRQ(ierr);} 284b9ad928SBarry Smith } 294b9ad928SBarry Smith for (i=1; i<l; i++) { 30*63e6d426SJed Brown if (mglevels[i]->eventinterprestrict) {ierr = PetscLogEventBegin(mglevels[i]->eventinterprestrict,0,0,0,0);CHKERRQ(ierr);} 31f3fbd535SBarry Smith ierr = MatInterpolateAdd(mglevels[i]->interpolate,mglevels[i-1]->x,mglevels[i]->x,mglevels[i]->x);CHKERRQ(ierr); 32*63e6d426SJed Brown if (mglevels[i]->eventinterprestrict) {ierr = PetscLogEventEnd(mglevels[i]->eventinterprestrict,0,0,0,0);CHKERRQ(ierr);} 334b9ad928SBarry Smith } 344b9ad928SBarry Smith PetscFunctionReturn(0); 354b9ad928SBarry Smith } 36