1 #pragma once 2 #include <petscksp.h> 3 #include <petsc/private/pcimpl.h> 4 #include <petsc/private/pcmgimpl.h> /*I "petscksp.h" I*/ 5 #include <petscmatcoarsen.h> /*I "petscmatcoarsen.h" I*/ 6 7 struct _PCGAMGOps { 8 PetscErrorCode (*creategraph)(PC, Mat, Mat *); 9 PetscErrorCode (*coarsen)(PC, Mat *, PetscCoarsenData **); 10 PetscErrorCode (*prolongator)(PC, Mat, Mat, PetscCoarsenData *, Mat *); 11 PetscErrorCode (*optprolongator)(PC, Mat, Mat *); 12 PetscErrorCode (*createlevel)(PC, Mat, PetscInt, Mat *, Mat *, PetscMPIInt *, IS *, PetscBool); 13 PetscErrorCode (*createdefaultdata)(PC, Mat); /* for data methods that have a default (SA) */ 14 PetscErrorCode (*setfromoptions)(PC, PetscOptionItems *); 15 PetscErrorCode (*destroy)(PC); 16 PetscErrorCode (*view)(PC, PetscViewer); 17 }; 18 /* Private context for the GAMG preconditioner */ 19 typedef struct gamg_TAG { 20 PCGAMGType type; 21 PetscInt Nlevels; 22 PetscBool repart; 23 PetscBool reuse_prol; 24 PetscBool use_aggs_in_asm; 25 PetscBool use_parallel_coarse_grid_solver; 26 PCGAMGLayoutType layout_type; 27 PetscBool cpu_pin_coarse_grids; 28 PetscInt min_eq_proc; 29 PetscInt coarse_eq_limit; 30 PetscReal threshold_scale; 31 PetscReal threshold[PETSC_MG_MAXLEVELS]; /* common quatity to many AMG methods so keep it up here */ 32 PetscInt level_reduction_factors[PETSC_MG_MAXLEVELS]; 33 PetscInt current_level; /* stash construction state */ 34 /* these 4 are all related to the method data and should be in the subctx */ 35 PetscInt data_sz; /* nloc*data_rows*data_cols */ 36 PetscInt data_cell_rows; 37 PetscInt data_cell_cols; 38 PetscInt orig_data_cell_rows; 39 PetscInt orig_data_cell_cols; 40 PetscReal *data; /* [data_sz] blocked vector of vertex data on fine grid (coordinates/nullspace) */ 41 PetscReal *orig_data; /* cache data */ 42 43 struct _PCGAMGOps *ops; 44 char *gamg_type_name; 45 46 void *subctx; 47 48 PetscBool use_sa_esteig; 49 PetscReal emin, emax; 50 PetscBool recompute_esteig; 51 } PC_GAMG; 52 53 PetscErrorCode PCReset_MG(PC); 54 55 /* hooks create derivied classes */ 56 PetscErrorCode PCCreateGAMG_GEO(PC); 57 PetscErrorCode PCCreateGAMG_AGG(PC); 58 PetscErrorCode PCCreateGAMG_Classical(PC); 59 60 PetscErrorCode PCDestroy_GAMG(PC); 61 62 /* helper methods */ 63 PetscErrorCode PCGAMGGetDataWithGhosts(Mat, PetscInt, PetscReal[], PetscInt *, PetscReal **); 64 65 enum tag { 66 GAMG_SETUP = 0, 67 GAMG_MESH, 68 GAMG_MATRIX, 69 GAMG_GRAPH, 70 GAMG_COARSEN, 71 GAMG_SQUARE, 72 GAMG_MIS, 73 GAMG_PROL, 74 GAMG_PROLA, 75 GAMG_PROLB, 76 GAMG_OPT, 77 GAMG_OPTSM, 78 GAMG_LEVEL, 79 GAMG_PTAP, 80 GAMG_REDUCE, 81 GAMG_REPART, 82 SET13, 83 SET14, 84 SET15, 85 GAMG_NUM_SET 86 }; 87 PETSC_EXTERN PetscLogEvent petsc_gamg_setup_events[GAMG_NUM_SET]; 88 PETSC_EXTERN PetscLogEvent petsc_gamg_setup_matmat_events[PETSC_MG_MAXLEVELS][3]; 89 90 typedef struct _PCGAMGHashTable { 91 PetscInt *table; 92 PetscInt *data; 93 PetscInt size; 94 } PCGAMGHashTable; 95 96 PETSC_INTERN PetscErrorCode PCGAMGHashTableCreate(PetscInt, PCGAMGHashTable *); 97 PETSC_INTERN PetscErrorCode PCGAMGHashTableDestroy(PCGAMGHashTable *); 98 PETSC_INTERN PetscErrorCode PCGAMGHashTableAdd(PCGAMGHashTable *, PetscInt, PetscInt); 99 100 #define GAMG_HASH(key) (PetscInt)((((PetscInt64)7) * (PetscInt64)key) % (PetscInt64)a_tab->size) 101 static inline PetscErrorCode PCGAMGHashTableFind(PCGAMGHashTable *a_tab, PetscInt a_key, PetscInt *a_data) 102 { 103 PetscInt kk, idx; 104 105 PetscFunctionBegin; 106 PetscCheck(a_key >= 0, PETSC_COMM_SELF, PETSC_ERR_USER, "Negative key %" PetscInt_FMT, a_key); 107 for (kk = 0, idx = GAMG_HASH(a_key); kk < a_tab->size; kk++, idx = (idx == (a_tab->size - 1)) ? 0 : idx + 1) { 108 if (a_tab->table[idx] == a_key) { 109 *a_data = a_tab->data[idx]; 110 break; 111 } else if (a_tab->table[idx] == -1) { 112 /* not here */ 113 *a_data = -1; 114 break; 115 } 116 } 117 PetscCheck(kk != a_tab->size, PETSC_COMM_SELF, PETSC_ERR_USER, "key %" PetscInt_FMT " not found in table", a_key); 118 PetscFunctionReturn(PETSC_SUCCESS); 119 } 120