1 #if !defined(__GAMG_IMPL) 2 #define __GAMG_IMPL 3 #include <petscksp.h> 4 #include <petsc/private/pcimpl.h> 5 #include <petsc/private/pcmgimpl.h> /*I "petscksp.h" I*/ 6 #include <petscmatcoarsen.h> /*I "petscmatcoarsen.h" I*/ 7 8 struct _PCGAMGOps { 9 PetscErrorCode (*graph)(PC, Mat, Mat*); 10 PetscErrorCode (*coarsen)(PC, Mat*, PetscCoarsenData**); 11 PetscErrorCode (*prolongator)(PC, Mat, Mat, PetscCoarsenData*, Mat*); 12 PetscErrorCode (*optprolongator)(PC, Mat, Mat*); 13 PetscErrorCode (*createlevel)(PC, Mat, PetscInt, Mat *, Mat *, PetscMPIInt *, IS *, PetscBool); 14 PetscErrorCode (*createdefaultdata)(PC, Mat); /* for data methods that have a default (SA) */ 15 PetscErrorCode (*setfromoptions)(PetscOptionItems*,PC); 16 PetscErrorCode (*destroy)(PC); 17 PetscErrorCode (*view)(PC,PetscViewer); 18 }; 19 /* Private context for the GAMG preconditioner */ 20 typedef struct gamg_TAG { 21 PCGAMGType type; 22 PetscInt Nlevels; 23 PetscBool repart; 24 PetscBool reuse_prol; 25 PetscBool use_aggs_in_asm; 26 PetscBool use_parallel_coarse_grid_solver; 27 PCGAMGLayoutType layout_type; 28 PetscBool cpu_pin_coarse_grids; 29 PetscInt min_eq_proc; 30 PetscInt coarse_eq_limit; 31 PetscReal threshold_scale; 32 PetscReal threshold[PETSC_MG_MAXLEVELS]; /* common quatity to many AMG methods so keep it up here */ 33 PetscInt level_reduction_factors[PETSC_MG_MAXLEVELS]; 34 PetscInt current_level; /* stash construction state */ 35 /* these 4 are all related to the method data and should be in the subctx */ 36 PetscInt data_sz; /* nloc*data_rows*data_cols */ 37 PetscInt data_cell_rows; 38 PetscInt data_cell_cols; 39 PetscInt orig_data_cell_rows; 40 PetscInt orig_data_cell_cols; 41 PetscReal *data; /* [data_sz] blocked vector of vertex data on fine grid (coordinates/nullspace) */ 42 PetscReal *orig_data; /* cache data */ 43 44 struct _PCGAMGOps *ops; 45 char *gamg_type_name; 46 47 void *subctx; 48 49 PetscBool use_sa_esteig; 50 PetscReal emin,emax; 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 PCGAMGCreateGraph(Mat, Mat*); 64 PetscErrorCode PCGAMGFilterGraph(Mat*, PetscReal, PetscBool); 65 PetscErrorCode PCGAMGGetDataWithGhosts(Mat, PetscInt, PetscReal[],PetscInt*, PetscReal **); 66 67 enum tag {SET1,SET2,GRAPH,GRAPH_MAT,GRAPH_FILTER,GRAPH_SQR,SET4,SET5,SET6,FIND_V,SET7,SET8,SET9,SET10,SET11,SET12,SET13,SET14,SET15,SET16,NUM_SET}; 68 PETSC_EXTERN PetscLogEvent petsc_gamg_setup_events[NUM_SET]; 69 PETSC_EXTERN PetscLogEvent PC_GAMGGraph_AGG; 70 PETSC_EXTERN PetscLogEvent PC_GAMGGraph_GEO; 71 PETSC_EXTERN PetscLogEvent PC_GAMGCoarsen_AGG; 72 PETSC_EXTERN PetscLogEvent PC_GAMGCoarsen_GEO; 73 PETSC_EXTERN PetscLogEvent PC_GAMGProlongator_AGG; 74 PETSC_EXTERN PetscLogEvent PC_GAMGProlongator_GEO; 75 PETSC_EXTERN PetscLogEvent PC_GAMGOptProlongator_AGG; 76 PETSC_EXTERN PetscLogEvent petsc_gamg_setup_matmat_events[PETSC_MG_MAXLEVELS][3]; 77 78 typedef struct _PCGAMGHashTable { 79 PetscInt *table; 80 PetscInt *data; 81 PetscInt size; 82 } PCGAMGHashTable; 83 84 PETSC_INTERN PetscErrorCode PCGAMGHashTableCreate(PetscInt, PCGAMGHashTable*); 85 PETSC_INTERN PetscErrorCode PCGAMGHashTableDestroy(PCGAMGHashTable*); 86 PETSC_INTERN PetscErrorCode PCGAMGHashTableAdd(PCGAMGHashTable*,PetscInt,PetscInt); 87 88 #define GAMG_HASH(key) (PetscInt)((((PetscInt64)7)*(PetscInt64)key)%(PetscInt64)a_tab->size) 89 static inline PetscErrorCode PCGAMGHashTableFind(PCGAMGHashTable *a_tab, PetscInt a_key, PetscInt *a_data) 90 { 91 PetscInt kk,idx; 92 93 PetscFunctionBegin; 94 PetscCheck(a_key>=0,PETSC_COMM_SELF,PETSC_ERR_USER,"Negative key %" PetscInt_FMT,a_key); 95 for (kk = 0, idx = GAMG_HASH(a_key); kk < a_tab->size; kk++, idx = (idx==(a_tab->size-1)) ? 0 : idx + 1) { 96 if (a_tab->table[idx] == a_key) { 97 *a_data = a_tab->data[idx]; 98 break; 99 } else if (a_tab->table[idx] == -1) { 100 /* not here */ 101 *a_data = -1; 102 break; 103 } 104 } 105 PetscCheck(kk!=a_tab->size,PETSC_COMM_SELF,PETSC_ERR_USER,"key %" PetscInt_FMT " not found in table",a_key); 106 PetscFunctionReturn(0); 107 } 108 109 #endif 110 111