1 #if !defined(_SNES_FASIMPLS) 2 #define _SNES_FASIMPLS 3 4 #include <petsc/private/snesimpl.h> 5 #include <petsc/private/linesearchimpl.h> 6 #include <petscdm.h> 7 8 typedef struct { 9 /* flags for knowing the global place of this FAS object */ 10 PetscInt level; /* level = 0 coarsest level */ 11 PetscInt levels; /* if level + 1 = levels; we're the last turtle */ 12 13 /* smoothing objects */ 14 SNES smoothu; /* the SNES for presmoothing */ 15 SNES smoothd; /* the SNES for postsmoothing */ 16 17 /* coarse grid correction objects */ 18 SNES next; /* the SNES instance for the next coarser level in the hierarchy */ 19 SNES fine; /* the finest SNES instance; used as a reference for prefixes */ 20 SNES previous; /* the SNES instance for the next finer level in the hierarchy */ 21 Mat interpolate; /* interpolation */ 22 Mat inject; /* injection operator (unscaled) */ 23 Mat restrct; /* restriction operator */ 24 Vec rscale; /* the pointwise scaling of the restriction operator */ 25 26 /* method parameters */ 27 PetscInt n_cycles; /* number of cycles on this level */ 28 SNESFASType fastype; /* FAS type */ 29 PetscInt max_up_it; /* number of pre-smooths */ 30 PetscInt max_down_it; /* number of post-smooth cycles */ 31 PetscBool usedmfornumberoflevels; /* uses a DM to generate a number of the levels */ 32 PetscBool full_downsweep; /* smooth on the initial full downsweep */ 33 PetscBool full_total; /* use total residual restriction and total solution interpolation on the initial downsweep and upsweep */ 34 PetscBool continuation; /* sets the setup to default to continuation */ 35 PetscInt full_stage; /* stage of the full cycle -- 0 is the upswing, 1 is the downsweep and final V-cycle */ 36 37 /* Galerkin FAS state */ 38 PetscBool galerkin; /* use Galerkin formation of the coarse problem */ 39 Vec Xg; /* Galerkin solution projection */ 40 Vec Fg; /* Galerkin function projection */ 41 42 /* if logging times for each level */ 43 PetscLogEvent eventsmoothsetup; /* level setup */ 44 PetscLogEvent eventsmoothsolve; /* level smoother solves */ 45 PetscLogEvent eventresidual; /* level residual evaluation */ 46 PetscLogEvent eventinterprestrict; /* level interpolation and restriction */ 47 } SNES_FAS; 48 49 PETSC_INTERN PetscErrorCode SNESFASCycleCreateSmoother_Private(SNES, SNES *); 50 51 #endif 52