Actual source code: gamg.h
petsc-3.3-p5 2012-12-01
3: #include <petsc-private/pcimpl.h> /*I "petscpc.h" I*/
4: #include <../src/ksp/pc/impls/mg/mgimpl.h> /*I "petscpcmg.h" I*/
5: #include <../src/mat/impls/aij/seq/aij.h>
6: #include <../src/mat/impls/aij/mpi/mpiaij.h>
7: #include <assert.h>
9: /* Private context for the GAMG preconditioner */
10: typedef struct gamg_TAG{
11: PetscInt Nlevels;
12: PetscInt setup_count;
13: PetscBool repart;
14: PetscBool use_aggs_in_gasm;
15: PetscInt min_eq_proc;
16: PetscInt coarse_eq_limit;
17: PetscReal threshold; /* common quatity to many AMG methods so keep it up here */
18: PetscInt verbose;
19: PetscInt emax_id; /* stashing places */
20: /* these 4 are all related to the method data and should be in the subctx */
21: PetscInt data_sz; /* nloc*data_rows*data_cols */
22: PetscInt data_cell_rows;
23: PetscInt data_cell_cols;
24: PetscReal *data; /* [data_sz] blocked vector of vertex data on fine grid (coordinates/nullspace) */
25: PetscErrorCode (*graph)( PC, const Mat, Mat * );
26: PetscErrorCode (*coarsen)( PC, Mat *, PetscCoarsenData** );
27: PetscErrorCode (*prolongator)( PC, const Mat, const Mat, PetscCoarsenData *, Mat* );
28: PetscErrorCode (*optprol)( PC, const Mat, Mat* );
29: PetscErrorCode (*formkktprol)( PC, const Mat, const Mat, Mat* );
30: PetscErrorCode (*createdefaultdata)( PC, Mat ); /* for data methods that have a default (SA) */
31: void *subctx;
32: } PC_GAMG;
34: #define GAMGAGG "agg"
35: #define GAMGGEO "geo"
37: PetscErrorCode PCSetFromOptions_MG( PC );
38: PetscErrorCode PCReset_MG( PC );
40: /* hooks create derivied classes */
41: PetscErrorCode PCCreateGAMG_GEO( PC pc );
42: PetscErrorCode PCCreateGAMG_AGG( PC pc );
44: PetscErrorCode PCSetFromOptions_GAMG( PC pc );
45: PetscErrorCode PCDestroy_GAMG(PC pc);
47: /* helper methods */
48: PetscErrorCode PCGAMGCreateGraph( const Mat, Mat * );
49: PetscErrorCode PCGAMGFilterGraph( Mat *, const PetscReal, const PetscBool, const PetscInt );
50: PetscErrorCode PCGAMGGetDataWithGhosts( const Mat a_Gmat, const PetscInt a_data_sz, const PetscReal a_data_in[],
51: PetscInt *a_stride, PetscReal **a_data_out );
53: #if defined PETSC_USE_LOG
54: /* #define PETSC_GAMG_USE_LOG */
55: 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};
56: #if defined PETSC_GAMG_USE_LOG
57: extern PetscLogEvent petsc_gamg_setup_events[NUM_SET];
58: #endif
59: extern PetscLogEvent PC_GAMGGgraph_AGG;
60: extern PetscLogEvent PC_GAMGGgraph_GEO;
61: extern PetscLogEvent PC_GAMGCoarsen_AGG;
62: extern PetscLogEvent PC_GAMGCoarsen_GEO;
63: extern PetscLogEvent PC_GAMGProlongator_AGG;
64: extern PetscLogEvent PC_GAMGProlongator_GEO;
65: extern PetscLogEvent PC_GAMGOptprol_AGG;
66: extern PetscLogEvent PC_GAMGKKTProl_AGG;
67: #endif
69: typedef struct _GAMGHashTable{
70: PetscInt *table;
71: PetscInt *data;
72: PetscInt size;
73: }GAMGHashTable;
75: extern PetscErrorCode GAMGTableCreate( PetscInt a_size, GAMGHashTable *a_tab );
76: extern PetscErrorCode GAMGTableDestroy( GAMGHashTable * );
77: extern PetscErrorCode GAMGTableAdd( GAMGHashTable *a_tab, PetscInt a_key, PetscInt a_data );
78: extern PetscErrorCode GAMGTableFind( GAMGHashTable *a_tab, PetscInt a_key, PetscInt *a_data );
80: #endif