1 #if !defined(__GAMG_IMPL) 2 #define __GAMG_IMPL 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 (*graph)(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)(PetscOptionItems*,PC); 15 PetscErrorCode (*destroy)(PC); 16 PetscErrorCode (*view)(PC,PetscViewer); 17 }; 18 #define PETSC_GAMG_MAXLEVELS 30 19 /* Private context for the GAMG preconditioner */ 20 typedef struct gamg_TAG { 21 PCGAMGType type; 22 PetscInt Nlevels; 23 PetscInt setup_count; 24 PetscBool repart; 25 PetscBool reuse_prol; 26 PetscBool use_aggs_in_asm; 27 PetscBool use_parallel_coarse_grid_solver; 28 PetscInt min_eq_proc; 29 PetscInt coarse_eq_limit; 30 PetscReal threshold_scale; 31 PetscInt current_level; /* stash construction state */ 32 PetscReal threshold[PETSC_GAMG_MAXLEVELS]; /* common quatity to many AMG methods so keep it up here */ 33 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 } PC_GAMG; 48 49 PetscErrorCode PCReset_MG(PC); 50 51 /* hooks create derivied classes */ 52 PetscErrorCode PCCreateGAMG_GEO(PC); 53 PetscErrorCode PCCreateGAMG_AGG(PC); 54 PetscErrorCode PCCreateGAMG_Classical(PC); 55 56 PetscErrorCode PCDestroy_GAMG(PC); 57 58 /* helper methods */ 59 PetscErrorCode PCGAMGCreateGraph(Mat, Mat*); 60 PetscErrorCode PCGAMGFilterGraph(Mat*, PetscReal, PetscBool); 61 PetscErrorCode PCGAMGGetDataWithGhosts(Mat, PetscInt, PetscReal[],PetscInt*, PetscReal **); 62 63 #if defined PETSC_USE_LOG 64 #define PETSC_GAMG_USE_LOG 65 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}; 66 #if defined PETSC_GAMG_USE_LOG 67 PETSC_EXTERN PetscLogEvent petsc_gamg_setup_events[NUM_SET]; 68 #endif 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 #endif 77 78 typedef struct _PCGAMGHashTable { 79 PetscInt *table; 80 PetscInt *data; 81 PetscInt size; 82 } PCGAMGHashTable; 83 84 85 PETSC_INTERN PetscErrorCode PCGAMGHashTableCreate(PetscInt, PCGAMGHashTable*); 86 PETSC_INTERN PetscErrorCode PCGAMGHashTableDestroy(PCGAMGHashTable*); 87 PETSC_INTERN PetscErrorCode PCGAMGHashTableAdd(PCGAMGHashTable*,PetscInt,PetscInt); 88 89 #define GAMG_HASH(key) ((((PetscInt)7)*key)%a_tab->size) 90 PETSC_STATIC_INLINE PetscErrorCode PCGAMGHashTableFind(PCGAMGHashTable *a_tab, PetscInt a_key, PetscInt *a_data) 91 { 92 PetscInt kk,idx; 93 94 PetscFunctionBegin; 95 if (a_key<0) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_USER,"Negative key %d.",a_key); 96 for (kk = 0, idx = GAMG_HASH(a_key); kk < a_tab->size; kk++, idx = (idx==(a_tab->size-1)) ? 0 : idx + 1) { 97 if (a_tab->table[idx] == a_key) { 98 *a_data = a_tab->data[idx]; 99 break; 100 } else if (a_tab->table[idx] == -1) { 101 /* not here */ 102 *a_data = -1; 103 break; 104 } 105 } 106 if (kk==a_tab->size) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_USER,"key %d not found in table",a_key); 107 PetscFunctionReturn(0); 108 } 109 110 #endif 111 112