Actual source code: gamg.h
petsc-3.4.2 2013-07-02
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 (*formkktprol)(PC, const Mat, const Mat, Mat*);
14: PetscErrorCode (*createdefaultdata)(PC, Mat); /* for data methods that have a default (SA) */
15: PetscErrorCode (*setfromoptions)(PC);
16: PetscErrorCode (*destroy)(PC);
17: };
19: /* Private context for the GAMG preconditioner */
20: typedef struct gamg_TAG {
21: PetscInt Nlevels;
22: PetscInt setup_count;
23: PetscBool repart;
24: PetscBool reuse_prol;
25: PetscBool use_aggs_in_gasm;
26: PetscInt min_eq_proc;
27: PetscInt coarse_eq_limit;
28: PetscReal threshold; /* common quatity to many AMG methods so keep it up here */
29: PetscInt verbose;
30: PetscInt emax_id; /* stashing places */
32: /* these 4 are all related to the method data and should be in the subctx */
33: PetscInt data_sz; /* nloc*data_rows*data_cols */
34: PetscInt data_cell_rows;
35: PetscInt data_cell_cols;
36: PetscInt orig_data_cell_rows;
37: PetscInt orig_data_cell_cols;
38: PetscReal eigtarget[2];
39: PetscReal *data; /* [data_sz] blocked vector of vertex data on fine grid (coordinates/nullspace) */
40: PetscReal *orig_data; /* cache data */
42: struct _PCGAMGOps *ops;
43: char *gamg_type_name;
45: void *subctx;
46: } PC_GAMG;
48: PetscErrorCode PCSetFromOptions_MG(PC);
49: PetscErrorCode PCReset_MG(PC);
51: /* hooks create derivied classes */
52: PetscErrorCode PCCreateGAMG_GEO(PC pc);
53: PetscErrorCode PCCreateGAMG_AGG(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: PETSC_INTERN PetscLogEvent PC_GAMGKKTProl_AGG;
77: #endif
79: typedef struct _GAMGHashTable {
80: PetscInt *table;
81: PetscInt *data;
82: PetscInt size;
83: } GAMGHashTable;
85: PETSC_EXTERN PetscErrorCode GAMGTableCreate(PetscInt a_size, GAMGHashTable *a_tab);
86: PETSC_EXTERN PetscErrorCode GAMGTableDestroy(GAMGHashTable*);
87: PETSC_EXTERN PetscErrorCode GAMGTableAdd(GAMGHashTable *a_tab, PetscInt a_key, PetscInt a_data);
88: PETSC_EXTERN PetscErrorCode GAMGTableFind(GAMGHashTable *a_tab, PetscInt a_key, PetscInt *a_data);
90: #endif