Actual source code: gamg.h
petsc-3.5.4 2015-05-23
3: #include <petsc-private/pcimpl.h>
4: #include <../src/ksp/pc/impls/mg/mgimpl.h> /*I "petscksp.h" I*/
5: #include <../src/mat/impls/aij/seq/aij.h>
6: #include <../src/mat/impls/aij/mpi/mpiaij.h>
8: struct _PCGAMGOps {
9: PetscErrorCode (*graph)(PC, const Mat, Mat*);
10: PetscErrorCode (*coarsen)(PC, Mat*, PetscCoarsenData**);
11: PetscErrorCode (*prolongator)(PC, const Mat, const Mat, PetscCoarsenData*, Mat*);
12: PetscErrorCode (*optprol)(PC, const Mat, Mat*);
13: PetscErrorCode (*createdefaultdata)(PC, Mat); /* for data methods that have a default (SA) */
14: PetscErrorCode (*setfromoptions)(PC);
15: PetscErrorCode (*destroy)(PC);
16: };
18: /* Private context for the GAMG preconditioner */
19: typedef struct gamg_TAG {
20: PetscInt Nlevels;
21: PetscInt setup_count;
22: PetscBool repart;
23: PetscBool reuse_prol;
24: PetscBool use_aggs_in_gasm;
25: PetscInt min_eq_proc;
26: PetscInt coarse_eq_limit;
27: PetscReal threshold; /* common quatity to many AMG methods so keep it up here */
28: PetscInt verbose;
29: PetscInt emax_id; /* stashing places */
31: /* these 4 are all related to the method data and should be in the subctx */
32: PetscInt data_sz; /* nloc*data_rows*data_cols */
33: PetscInt data_cell_rows;
34: PetscInt data_cell_cols;
35: PetscInt orig_data_cell_rows;
36: PetscInt orig_data_cell_cols;
37: PetscReal eigtarget[2];
38: PetscReal *data; /* [data_sz] blocked vector of vertex data on fine grid (coordinates/nullspace) */
39: PetscReal *orig_data; /* cache data */
41: struct _PCGAMGOps *ops;
42: char *gamg_type_name;
44: void *subctx;
45: } PC_GAMG;
47: PetscErrorCode PCSetFromOptions_MG(PC);
48: PetscErrorCode PCReset_MG(PC);
50: /* hooks create derivied classes */
51: PetscErrorCode PCCreateGAMG_GEO(PC pc);
52: PetscErrorCode PCCreateGAMG_AGG(PC pc);
53: PetscErrorCode PCCreateGAMG_Classical(PC pc);
55: PetscErrorCode PCSetFromOptions_GAMG(PC pc);
56: PetscErrorCode PCDestroy_GAMG(PC pc);
58: /* helper methods */
59: PetscErrorCode PCGAMGCreateGraph(const Mat, Mat*);
60: PetscErrorCode PCGAMGFilterGraph(Mat*, const PetscReal, const PetscBool, const PetscInt);
61: PetscErrorCode PCGAMGGetDataWithGhosts(const Mat a_Gmat, const PetscInt a_data_sz, const PetscReal a_data_in[],PetscInt *a_stride, PetscReal **a_data_out);
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_INTERN PetscLogEvent petsc_gamg_setup_events[NUM_SET];
68: #endif
69: PETSC_INTERN PetscLogEvent PC_GAMGGgraph_AGG;
70: PETSC_INTERN PetscLogEvent PC_GAMGGgraph_GEO;
71: PETSC_INTERN PetscLogEvent PC_GAMGCoarsen_AGG;
72: PETSC_INTERN PetscLogEvent PC_GAMGCoarsen_GEO;
73: PETSC_INTERN PetscLogEvent PC_GAMGProlongator_AGG;
74: PETSC_INTERN PetscLogEvent PC_GAMGProlongator_GEO;
75: PETSC_INTERN PetscLogEvent PC_GAMGOptprol_AGG;
76: #endif
78: typedef struct _GAMGHashTable {
79: PetscInt *table;
80: PetscInt *data;
81: PetscInt size;
82: } GAMGHashTable;
84: PETSC_EXTERN PetscErrorCode GAMGTableCreate(PetscInt a_size, GAMGHashTable *a_tab);
85: PETSC_EXTERN PetscErrorCode GAMGTableDestroy(GAMGHashTable*);
86: PETSC_EXTERN PetscErrorCode GAMGTableAdd(GAMGHashTable *a_tab, PetscInt a_key, PetscInt a_data);
87: PETSC_EXTERN PetscErrorCode GAMGTableFind(GAMGHashTable *a_tab, PetscInt a_key, PetscInt *a_data);
89: #endif