1 #if !defined(_SNES_FASIMPLS) 2 #define _SNES_FASIMPLS 3 4 #include <petsc-private/snesimpl.h> 5 #include <petsc-private/linesearchimpl.h> 6 #include <petsc-private/dmimpl.h> 7 #include <petscsnesfas.h> 8 9 typedef struct { 10 11 /* flags for knowing the global place of this FAS object */ 12 PetscInt level; /* level = 0 coarsest level */ 13 PetscInt levels; /* if level + 1 = levels; we're the last turtle */ 14 15 PetscViewer monitor; /* debuggging output for FAS */ 16 17 /* smoothing objects */ 18 SNES smoothu; /* the SNES for presmoothing */ 19 SNES smoothd; /* the SNES for postsmoothing */ 20 21 /* coarse grid correction objects */ 22 SNES next; /* the SNES instance for the next coarser level in the hierarchy */ 23 SNES fine; /* the finest SNES instance; used as a reference for prefixes */ 24 SNES previous; /* the SNES instance for the next finer level in the hierarchy */ 25 Mat interpolate; /* interpolation */ 26 Mat inject; /* injection operator (unscaled) */ 27 Mat restrct; /* restriction operator */ 28 Vec rscale; /* the pointwise scaling of the restriction operator */ 29 30 /* method parameters */ 31 PetscInt n_cycles; /* number of cycles on this level */ 32 SNESFASType fastype; /* FAS type */ 33 PetscInt max_up_it; /* number of pre-smooths */ 34 PetscInt max_down_it; /* number of post-smooth cycles */ 35 PetscBool usedmfornumberoflevels; /* uses a DM to generate a number of the levels */ 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 48 } SNES_FAS; 49 50 #endif 51