1 /* 2 Defines matrix-matrix product routines for pairs of MPIAIJ matrices 3 C = A * B 4 */ 5 6 #include "src/mat/impls/aij/seq/aij.h" /*I "petscmat.h" I*/ 7 #include "src/mat/utils/freespace.h" 8 #include "src/mat/impls/aij/mpi/mpiaij.h" 9 #include "petscbt.h" 10 11 #undef __FUNCT__ 12 #define __FUNCT__ "MatMatMult_MPIAIJ_MPIAIJ" 13 PetscErrorCode MatMatMult_MPIAIJ_MPIAIJ(Mat A,Mat B,MatReuse scall,PetscReal fill, Mat *C) 14 { 15 PetscErrorCode ierr; 16 17 PetscFunctionBegin; 18 if (scall == MAT_INITIAL_MATRIX){ 19 ierr = MatMatMultSymbolic_MPIAIJ_MPIAIJ(A,B,fill,C);CHKERRQ(ierr);/* numeric product is computed as well */ 20 } else if (scall == MAT_REUSE_MATRIX){ 21 ierr = MatMatMultNumeric_MPIAIJ_MPIAIJ(A,B,*C);CHKERRQ(ierr); 22 } else { 23 SETERRQ1(PETSC_ERR_ARG_WRONG,"Invalid MatReuse %d",(int)scall); 24 } 25 PetscFunctionReturn(0); 26 } 27 28 #undef __FUNCT__ 29 #define __FUNCT__ "PetscObjectContainerDestroy_Mat_MatMatMultMPI" 30 PetscErrorCode PetscObjectContainerDestroy_Mat_MatMatMultMPI(PetscObject obj) 31 { 32 PetscErrorCode ierr; 33 Mat A=(Mat)obj; 34 PetscObjectContainer container; 35 Mat_MatMatMultMPI *mult=PETSC_NULL; 36 37 PetscFunctionBegin; 38 ierr = PetscObjectQuery((PetscObject)A,"Mat_MatMatMultMPI",(PetscObject *)&container);CHKERRQ(ierr); 39 if (container) { 40 ierr = PetscObjectContainerGetPointer(container,(void **)&mult);CHKERRQ(ierr); 41 if (mult->startsj){ierr = PetscFree(mult->startsj);CHKERRQ(ierr);} 42 if (mult->bufa){ierr = PetscFree(mult->bufa);CHKERRQ(ierr);} 43 if (mult->isrowa){ierr = ISDestroy(mult->isrowa);CHKERRQ(ierr);} 44 if (mult->isrowb){ierr = ISDestroy(mult->isrowb);CHKERRQ(ierr);} 45 if (mult->iscolb){ierr = ISDestroy(mult->iscolb);CHKERRQ(ierr);} 46 if (mult->C_seq){ierr = MatDestroy(mult->C_seq);CHKERRQ(ierr);} 47 if (mult->A_loc){ierr = MatDestroy(mult->A_loc);CHKERRQ(ierr); } 48 if (mult->B_seq){ierr = MatDestroy(mult->B_seq);CHKERRQ(ierr);} 49 if (mult->B_loc){ierr = MatDestroy(mult->B_loc);CHKERRQ(ierr);} 50 if (mult->B_oth){ierr = MatDestroy(mult->B_oth);CHKERRQ(ierr);} 51 if (mult->abi){ierr = PetscFree(mult->abi);CHKERRQ(ierr);} 52 if (mult->abj){ierr = PetscFree(mult->abj);CHKERRQ(ierr);} 53 ierr = PetscObjectContainerDestroy(container);CHKERRQ(ierr); 54 ierr = PetscObjectCompose((PetscObject)A,"Mat_MatMatMultMPI",0);CHKERRQ(ierr); 55 ierr = PetscFree(mult);CHKERRQ(ierr); 56 } 57 PetscFunctionReturn(0); 58 } 59 60 EXTERN PetscErrorCode MatDestroy_MPIAIJ(Mat); 61 #undef __FUNCT__ 62 #define __FUNCT__ "MatDestroy_MPIAIJ_MatMatMult" 63 PetscErrorCode MatDestroy_MPIAIJ_MatMatMult(Mat A) 64 { 65 PetscErrorCode ierr; 66 67 PetscFunctionBegin; 68 ierr = PetscObjectContainerDestroy_Mat_MatMatMultMPI((PetscObject)A);CHKERRQ(ierr); 69 ierr = MatDestroy_MPIAIJ(A);CHKERRQ(ierr); 70 PetscFunctionReturn(0); 71 } 72 73 #undef __FUNCT__ 74 #define __FUNCT__ "MatMatMultSymbolic_MPIAIJ_MPIAIJ" 75 PetscErrorCode MatMatMultSymbolic_MPIAIJ_MPIAIJ(Mat A,Mat B,PetscReal fill,Mat *C) 76 { 77 Mat_MPIAIJ *a=(Mat_MPIAIJ*)A->data,*b=(Mat_MPIAIJ*)B->data; 78 PetscErrorCode ierr; 79 PetscInt start,end; 80 Mat_MatMatMultMPI *mult; 81 PetscObjectContainer container; 82 83 PetscFunctionBegin; 84 if (a->cstart != b->rstart || a->cend != b->rend){ 85 SETERRQ4(PETSC_ERR_ARG_SIZ,"Matrix local dimensions are incompatible, (%D, %D) != (%D,%D)",a->cstart,a->cend,b->rstart,b->rend); 86 } 87 ierr = PetscNew(Mat_MatMatMultMPI,&mult);CHKERRQ(ierr); 88 ierr = PetscMemzero(mult,sizeof(Mat_MatMatMultMPI));CHKERRQ(ierr); 89 90 /* create a seq matrix B_seq = submatrix of B by taking rows of B that equal to nonzero col of A */ 91 ierr = MatGetBrowsOfAcols(A,B,MAT_INITIAL_MATRIX,&mult->isrowb,&mult->iscolb,&mult->brstart,&mult->B_seq);CHKERRQ(ierr); 92 93 /* create a seq matrix A_seq = submatrix of A by taking all local rows of A */ 94 start = a->rstart; end = a->rend; 95 ierr = ISCreateStride(PETSC_COMM_SELF,end-start,start,1,&mult->isrowa);CHKERRQ(ierr); 96 ierr = MatGetLocalMatCondensed(A,MAT_INITIAL_MATRIX,&mult->isrowa,&mult->isrowb,&mult->A_loc);CHKERRQ(ierr); 97 98 /* compute C_seq = A_seq * B_seq */ 99 ierr = MatMatMult_SeqAIJ_SeqAIJ(mult->A_loc,mult->B_seq,MAT_INITIAL_MATRIX,fill,&mult->C_seq);CHKERRQ(ierr); 100 101 /* create mpi matrix C by concatinating C_seq */ 102 ierr = PetscObjectReference((PetscObject)mult->C_seq);CHKERRQ(ierr); /* prevent C_seq being destroyed by MatMerge() */ 103 ierr = MatMerge(A->comm,mult->C_seq,B->n,MAT_INITIAL_MATRIX,C);CHKERRQ(ierr); 104 105 /* attach the supporting struct to C for reuse of symbolic C */ 106 ierr = PetscObjectContainerCreate(PETSC_COMM_SELF,&container);CHKERRQ(ierr); 107 ierr = PetscObjectContainerSetPointer(container,mult);CHKERRQ(ierr); 108 ierr = PetscObjectCompose((PetscObject)(*C),"Mat_MatMatMultMPI",(PetscObject)container);CHKERRQ(ierr); 109 110 (*C)->ops->destroy = MatDestroy_MPIAIJ_MatMatMult; 111 112 PetscFunctionReturn(0); 113 } 114 115 /* This routine is called ONLY in the case of reusing previously computed symbolic C */ 116 #undef __FUNCT__ 117 #define __FUNCT__ "MatMatMultNumeric_MPIAIJ_MPIAIJ" 118 PetscErrorCode MatMatMultNumeric_MPIAIJ_MPIAIJ(Mat A,Mat B,Mat C) 119 { 120 PetscErrorCode ierr; 121 Mat *seq; 122 Mat_MatMatMultMPI *mult; 123 PetscObjectContainer container; 124 125 PetscFunctionBegin; 126 ierr = PetscObjectQuery((PetscObject)C,"Mat_MatMatMultMPI",(PetscObject *)&container);CHKERRQ(ierr); 127 if (container) { 128 ierr = PetscObjectContainerGetPointer(container,(void **)&mult);CHKERRQ(ierr); 129 } 130 131 seq = &mult->B_seq; 132 ierr = MatGetSubMatrices(B,1,&mult->isrowb,&mult->iscolb,MAT_REUSE_MATRIX,&seq);CHKERRQ(ierr); 133 mult->B_seq = *seq; 134 135 seq = &mult->A_loc; 136 ierr = MatGetSubMatrices(A,1,&mult->isrowa,&mult->isrowb,MAT_REUSE_MATRIX,&seq);CHKERRQ(ierr); 137 mult->A_loc = *seq; 138 139 ierr = MatMatMult_SeqAIJ_SeqAIJ(mult->A_loc,mult->B_seq,MAT_REUSE_MATRIX,0.0,&mult->C_seq);CHKERRQ(ierr); 140 141 ierr = PetscObjectReference((PetscObject)mult->C_seq);CHKERRQ(ierr); 142 ierr = MatMerge(A->comm,mult->C_seq,B->n,MAT_REUSE_MATRIX,&C);CHKERRQ(ierr); 143 144 PetscFunctionReturn(0); 145 } 146