1 2 #if !defined(__BJACOBI_H) 3 #define __BJACOBI_H 4 /* 5 Private data for block Jacobi and block Gauss-Seidel preconditioner. 6 */ 7 #include "petscksp.h" 8 #include "private/pcimpl.h" 9 10 /* 11 This data is general for all implementations 12 */ 13 typedef struct { 14 PetscInt n,n_local; /* number of blocks (global, local) */ 15 PetscInt first_local; /* number of first block on processor */ 16 PetscTruth use_true_local; /* use block from true matrix, not preconditioner matrix for local MatMult() */ 17 KSP *ksp; /* KSP contexts for blocks */ 18 void *data; /* implementation-specific data */ 19 PetscTruth same_local_solves; /* flag indicating whether all local solvers are same (used for PCView()) */ 20 PetscInt *l_lens; /* lens of each block */ 21 PetscInt *g_lens; 22 Mat tp_mat,tp_pmat; /* diagonal block of matrix for this processor */ 23 } PC_BJacobi; 24 25 /* 26 This data is specific for certain implementations 27 */ 28 29 /* This is for multiple blocks per processor */ 30 31 typedef struct { 32 Vec *x,*y; /* work vectors for solves on each block */ 33 PetscInt *starts; /* starting point of each block */ 34 Mat *mat,*pmat; /* submatrices for each block */ 35 IS *is; /* for gathering the submatrices */ 36 } PC_BJacobi_Multiblock; 37 38 /* This is for a single block per processor */ 39 typedef struct { 40 Vec x,y; 41 } PC_BJacobi_Singleblock; 42 43 #endif 44 45 46