1 2 /* 3 Defines matrix-matrix product routines for pairs of MPIAIJ matrices 4 C = A * B 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 #include <../src/mat/impls/dense/mpi/mpidense.h> 11 12 #undef __FUNCT__ 13 #define __FUNCT__ "MatMatMult_MPIAIJ_MPIAIJ" 14 PetscErrorCode MatMatMult_MPIAIJ_MPIAIJ(Mat A,Mat B,MatReuse scall,PetscReal fill, Mat *C) 15 { 16 PetscErrorCode ierr; 17 18 PetscFunctionBegin; 19 if (scall == MAT_INITIAL_MATRIX){ 20 ierr = MatMatMultSymbolic_MPIAIJ_MPIAIJ(A,B,fill,C);CHKERRQ(ierr);/* numeric product is computed as well */ 21 } else if (scall == MAT_REUSE_MATRIX){ 22 ierr = MatMatMultNumeric_MPIAIJ_MPIAIJ(A,B,*C);CHKERRQ(ierr); 23 } else { 24 SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONG,"Invalid MatReuse %d",(int)scall); 25 } 26 PetscFunctionReturn(0); 27 } 28 29 #undef __FUNCT__ 30 #define __FUNCT__ "PetscContainerDestroy_Mat_MatMatMultMPI" 31 PetscErrorCode PetscContainerDestroy_Mat_MatMatMultMPI(void *ptr) 32 { 33 PetscErrorCode ierr; 34 Mat_MatMatMultMPI *mult=(Mat_MatMatMultMPI*)ptr; 35 36 PetscFunctionBegin; 37 ierr = PetscFree2(mult->startsj,mult->startsj_r);CHKERRQ(ierr); 38 ierr = PetscFree(mult->bufa);CHKERRQ(ierr); 39 ierr = ISDestroy(&mult->isrowa);CHKERRQ(ierr); 40 ierr = ISDestroy(&mult->isrowb);CHKERRQ(ierr); 41 ierr = ISDestroy(&mult->iscolb);CHKERRQ(ierr); 42 ierr = MatDestroy(&mult->C_seq);CHKERRQ(ierr); 43 ierr = MatDestroy(&mult->A_loc);CHKERRQ(ierr); 44 ierr = MatDestroy(&mult->B_seq);CHKERRQ(ierr); 45 ierr = MatDestroy(&mult->B_loc);CHKERRQ(ierr); 46 ierr = MatDestroy(&mult->B_oth);CHKERRQ(ierr); 47 ierr = PetscFree(mult->abi);CHKERRQ(ierr); 48 ierr = PetscFree(mult->abj);CHKERRQ(ierr); 49 ierr = PetscFree(mult);CHKERRQ(ierr); 50 PetscFunctionReturn(0); 51 } 52 53 extern PetscErrorCode MatDestroy_AIJ(Mat); 54 #undef __FUNCT__ 55 #define __FUNCT__ "MatDestroy_MPIAIJ_MatMatMult" 56 PetscErrorCode MatDestroy_MPIAIJ_MatMatMult(Mat A) 57 { 58 PetscErrorCode ierr; 59 PetscContainer container; 60 Mat_MatMatMultMPI *mult=PETSC_NULL; 61 62 PetscFunctionBegin; 63 ierr = PetscObjectQuery((PetscObject)A,"Mat_MatMatMultMPI",(PetscObject *)&container);CHKERRQ(ierr); 64 if (!container) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Container does not exit"); 65 ierr = PetscContainerGetPointer(container,(void **)&mult);CHKERRQ(ierr); 66 A->ops->destroy = mult->destroy; 67 A->ops->duplicate = mult->duplicate; 68 if (A->ops->destroy) { 69 ierr = (*A->ops->destroy)(A);CHKERRQ(ierr); 70 } 71 ierr = PetscObjectCompose((PetscObject)A,"Mat_MatMatMultMPI",0);CHKERRQ(ierr); 72 PetscFunctionReturn(0); 73 } 74 75 #undef __FUNCT__ 76 #define __FUNCT__ "MatDuplicate_MPIAIJ_MatMatMult" 77 PetscErrorCode MatDuplicate_MPIAIJ_MatMatMult(Mat A, MatDuplicateOption op, Mat *M) 78 { 79 PetscErrorCode ierr; 80 Mat_MatMatMultMPI *mult; 81 PetscContainer container; 82 83 PetscFunctionBegin; 84 ierr = PetscObjectQuery((PetscObject)A,"Mat_MatMatMultMPI",(PetscObject *)&container);CHKERRQ(ierr); 85 if (!container) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Container does not exit"); 86 ierr = PetscContainerGetPointer(container,(void **)&mult);CHKERRQ(ierr); 87 /* Note: the container is not duplicated, because it requires deep copying of 88 several large data sets (see PetscContainerDestroy_Mat_MatMatMultMPI()). 89 These data sets are only used for repeated calling of MatMatMultNumeric(). 90 *M is unlikely being used in this way. Thus we create *M with pure mpiaij format */ 91 ierr = (*mult->duplicate)(A,op,M);CHKERRQ(ierr); 92 (*M)->ops->destroy = mult->destroy; /* = MatDestroy_MPIAIJ, *M doesn't duplicate A's container! */ 93 (*M)->ops->duplicate = mult->duplicate; /* = MatDuplicate_MPIAIJ */ 94 PetscFunctionReturn(0); 95 } 96 97 #undef __FUNCT__ 98 #define __FUNCT__ "MatMatMultSymbolic_MPIAIJ_MPIAIJ" 99 PetscErrorCode MatMatMultSymbolic_MPIAIJ_MPIAIJ(Mat A,Mat B,PetscReal fill,Mat *C) 100 { 101 PetscErrorCode ierr; 102 PetscInt start,end; 103 Mat_MatMatMultMPI *mult; 104 PetscContainer container; 105 106 PetscFunctionBegin; 107 if (A->cmap->rstart != B->rmap->rstart || A->cmap->rend != B->rmap->rend){ 108 SETERRQ4(PETSC_COMM_SELF,PETSC_ERR_ARG_SIZ,"Matrix local dimensions are incompatible, (%D, %D) != (%D,%D)",A->cmap->rstart,A->cmap->rend,B->rmap->rstart,B->rmap->rend); 109 } 110 ierr = PetscNew(Mat_MatMatMultMPI,&mult);CHKERRQ(ierr); 111 112 /* create a seq matrix B_seq = submatrix of B by taking rows of B that equal to nonzero col of A */ 113 ierr = MatGetBrowsOfAcols(A,B,MAT_INITIAL_MATRIX,&mult->isrowb,&mult->iscolb,&mult->brstart,&mult->B_seq);CHKERRQ(ierr); 114 115 /* create a seq matrix A_seq = submatrix of A by taking all local rows of A */ 116 start = A->rmap->rstart; end = A->rmap->rend; 117 ierr = ISCreateStride(PETSC_COMM_SELF,end-start,start,1,&mult->isrowa);CHKERRQ(ierr); 118 ierr = MatMPIAIJGetLocalMatCondensed(A,MAT_INITIAL_MATRIX,&mult->isrowa,&mult->isrowb,&mult->A_loc);CHKERRQ(ierr); 119 120 /* compute C_seq = A_seq * B_seq */ 121 ierr = MatMatMult_SeqAIJ_SeqAIJ(mult->A_loc,mult->B_seq,MAT_INITIAL_MATRIX,fill,&mult->C_seq);CHKERRQ(ierr); 122 123 /* create mpi matrix C by concatinating C_seq */ 124 ierr = PetscObjectReference((PetscObject)mult->C_seq);CHKERRQ(ierr); /* prevent C_seq being destroyed by MatMerge() */ 125 ierr = MatMerge(((PetscObject)A)->comm,mult->C_seq,B->cmap->n,MAT_INITIAL_MATRIX,C);CHKERRQ(ierr); 126 127 /* attach the supporting struct to C for reuse of symbolic C */ 128 ierr = PetscContainerCreate(PETSC_COMM_SELF,&container);CHKERRQ(ierr); 129 ierr = PetscContainerSetPointer(container,mult);CHKERRQ(ierr); 130 ierr = PetscContainerSetUserDestroy(container,PetscContainerDestroy_Mat_MatMatMultMPI);CHKERRQ(ierr); 131 ierr = PetscObjectCompose((PetscObject)(*C),"Mat_MatMatMultMPI",(PetscObject)container);CHKERRQ(ierr); 132 mult->destroy = (*C)->ops->destroy; 133 mult->duplicate = (*C)->ops->duplicate; 134 (*C)->ops->destroy = MatDestroy_MPIAIJ_MatMatMult; 135 (*C)->ops->duplicate = MatDuplicate_MPIAIJ_MatMatMult; 136 PetscFunctionReturn(0); 137 } 138 139 /* This routine is called ONLY in the case of reusing previously computed symbolic C */ 140 #undef __FUNCT__ 141 #define __FUNCT__ "MatMatMultNumeric_MPIAIJ_MPIAIJ" 142 PetscErrorCode MatMatMultNumeric_MPIAIJ_MPIAIJ(Mat A,Mat B,Mat C) 143 { 144 PetscErrorCode ierr; 145 Mat *seq; 146 Mat_MatMatMultMPI *mult; 147 PetscContainer container; 148 149 PetscFunctionBegin; 150 ierr = PetscObjectQuery((PetscObject)C,"Mat_MatMatMultMPI",(PetscObject *)&container);CHKERRQ(ierr); 151 if (!container) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Container does not exit"); 152 ierr = PetscContainerGetPointer(container,(void **)&mult);CHKERRQ(ierr); 153 154 seq = &mult->B_seq; 155 ierr = MatGetSubMatrices(B,1,&mult->isrowb,&mult->iscolb,MAT_REUSE_MATRIX,&seq);CHKERRQ(ierr); 156 mult->B_seq = *seq; 157 158 seq = &mult->A_loc; 159 ierr = MatGetSubMatrices(A,1,&mult->isrowa,&mult->isrowb,MAT_REUSE_MATRIX,&seq);CHKERRQ(ierr); 160 mult->A_loc = *seq; 161 162 ierr = MatMatMult_SeqAIJ_SeqAIJ(mult->A_loc,mult->B_seq,MAT_REUSE_MATRIX,0.0,&mult->C_seq);CHKERRQ(ierr); 163 164 ierr = PetscObjectReference((PetscObject)mult->C_seq);CHKERRQ(ierr); 165 ierr = MatMerge(((PetscObject)A)->comm,mult->C_seq,B->cmap->n,MAT_REUSE_MATRIX,&C);CHKERRQ(ierr); 166 PetscFunctionReturn(0); 167 } 168 169 #undef __FUNCT__ 170 #define __FUNCT__ "MatMatMult_MPIAIJ_MPIDense" 171 PetscErrorCode MatMatMult_MPIAIJ_MPIDense(Mat A,Mat B,MatReuse scall,PetscReal fill,Mat *C) 172 { 173 PetscErrorCode ierr; 174 175 PetscFunctionBegin; 176 if (scall == MAT_INITIAL_MATRIX){ 177 ierr = MatMatMultSymbolic_MPIAIJ_MPIDense(A,B,fill,C);CHKERRQ(ierr); 178 } 179 ierr = MatMatMultNumeric_MPIAIJ_MPIDense(A,B,*C);CHKERRQ(ierr); 180 PetscFunctionReturn(0); 181 } 182 183 typedef struct { 184 Mat workB; 185 PetscScalar *rvalues,*svalues; 186 MPI_Request *rwaits,*swaits; 187 } MPIAIJ_MPIDense; 188 189 #undef __FUNCT__ 190 #define __FUNCT__ "MPIAIJ_MPIDenseDestroy" 191 PetscErrorCode MPIAIJ_MPIDenseDestroy(void *ctx) 192 { 193 MPIAIJ_MPIDense *contents = (MPIAIJ_MPIDense*) ctx; 194 PetscErrorCode ierr; 195 196 PetscFunctionBegin; 197 ierr = MatDestroy(&contents->workB);CHKERRQ(ierr); 198 ierr = PetscFree4(contents->rvalues,contents->svalues,contents->rwaits,contents->swaits);CHKERRQ(ierr); 199 ierr = PetscFree(contents);CHKERRQ(ierr); 200 PetscFunctionReturn(0); 201 } 202 203 #undef __FUNCT__ 204 #define __FUNCT__ "MatMatMultSymbolic_MPIAIJ_MPIDense" 205 PetscErrorCode MatMatMultSymbolic_MPIAIJ_MPIDense(Mat A,Mat B,PetscReal fill,Mat *C) 206 { 207 PetscErrorCode ierr; 208 Mat_MPIAIJ *aij = (Mat_MPIAIJ*) A->data; 209 PetscInt nz = aij->B->cmap->n; 210 PetscContainer container; 211 MPIAIJ_MPIDense *contents; 212 VecScatter ctx = aij->Mvctx; 213 VecScatter_MPI_General *from = (VecScatter_MPI_General*) ctx->fromdata; 214 VecScatter_MPI_General *to = ( VecScatter_MPI_General*) ctx->todata; 215 PetscInt m=A->rmap->n,n=B->cmap->n; 216 217 PetscFunctionBegin; 218 ierr = MatCreate(((PetscObject)B)->comm,C);CHKERRQ(ierr); 219 ierr = MatSetSizes(*C,m,n,A->rmap->N,B->cmap->N);CHKERRQ(ierr); 220 ierr = MatSetType(*C,MATMPIDENSE);CHKERRQ(ierr); 221 ierr = MatAssemblyBegin(*C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 222 ierr = MatAssemblyEnd(*C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 223 224 ierr = PetscNew(MPIAIJ_MPIDense,&contents);CHKERRQ(ierr); 225 /* Create work matrix used to store off processor rows of B needed for local product */ 226 ierr = MatCreateSeqDense(PETSC_COMM_SELF,nz,B->cmap->N,PETSC_NULL,&contents->workB);CHKERRQ(ierr); 227 /* Create work arrays needed */ 228 ierr = PetscMalloc4(B->cmap->N*from->starts[from->n],PetscScalar,&contents->rvalues, 229 B->cmap->N*to->starts[to->n],PetscScalar,&contents->svalues, 230 from->n,MPI_Request,&contents->rwaits, 231 to->n,MPI_Request,&contents->swaits);CHKERRQ(ierr); 232 233 ierr = PetscContainerCreate(((PetscObject)A)->comm,&container);CHKERRQ(ierr); 234 ierr = PetscContainerSetPointer(container,contents);CHKERRQ(ierr); 235 ierr = PetscContainerSetUserDestroy(container,MPIAIJ_MPIDenseDestroy);CHKERRQ(ierr); 236 ierr = PetscObjectCompose((PetscObject)(*C),"workB",(PetscObject)container);CHKERRQ(ierr); 237 ierr = PetscContainerDestroy(&container);CHKERRQ(ierr); 238 PetscFunctionReturn(0); 239 } 240 241 #undef __FUNCT__ 242 #define __FUNCT__ "MatMPIDenseScatter" 243 /* 244 Performs an efficient scatter on the rows of B needed by this process; this is 245 a modification of the VecScatterBegin_() routines. 246 */ 247 PetscErrorCode MatMPIDenseScatter(Mat A,Mat B,Mat C,Mat *outworkB) 248 { 249 Mat_MPIAIJ *aij = (Mat_MPIAIJ*)A->data; 250 PetscErrorCode ierr; 251 PetscScalar *b,*w,*svalues,*rvalues; 252 VecScatter ctx = aij->Mvctx; 253 VecScatter_MPI_General *from = (VecScatter_MPI_General*) ctx->fromdata; 254 VecScatter_MPI_General *to = ( VecScatter_MPI_General*) ctx->todata; 255 PetscInt i,j,k; 256 PetscInt *sindices,*sstarts,*rindices,*rstarts; 257 PetscMPIInt *sprocs,*rprocs,nrecvs; 258 MPI_Request *swaits,*rwaits; 259 MPI_Comm comm = ((PetscObject)A)->comm; 260 PetscMPIInt tag = ((PetscObject)ctx)->tag,ncols = B->cmap->N, nrows = aij->B->cmap->n,imdex,nrowsB = B->rmap->n; 261 MPI_Status status; 262 MPIAIJ_MPIDense *contents; 263 PetscContainer container; 264 Mat workB; 265 266 PetscFunctionBegin; 267 ierr = PetscObjectQuery((PetscObject)C,"workB",(PetscObject*)&container);CHKERRQ(ierr); 268 if (!container) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Container does not exit"); 269 ierr = PetscContainerGetPointer(container,(void**)&contents);CHKERRQ(ierr); 270 271 workB = *outworkB = contents->workB; 272 if (nrows != workB->rmap->n) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Number of rows of workB %D not equal to columns of aij->B %D",nrows,workB->cmap->n); 273 sindices = to->indices; 274 sstarts = to->starts; 275 sprocs = to->procs; 276 swaits = contents->swaits; 277 svalues = contents->svalues; 278 279 rindices = from->indices; 280 rstarts = from->starts; 281 rprocs = from->procs; 282 rwaits = contents->rwaits; 283 rvalues = contents->rvalues; 284 285 ierr = MatGetArray(B,&b);CHKERRQ(ierr); 286 ierr = MatGetArray(workB,&w);CHKERRQ(ierr); 287 288 for (i=0; i<from->n; i++) { 289 ierr = MPI_Irecv(rvalues+ncols*rstarts[i],ncols*(rstarts[i+1]-rstarts[i]),MPIU_SCALAR,rprocs[i],tag,comm,rwaits+i);CHKERRQ(ierr); 290 } 291 292 for (i=0; i<to->n; i++) { 293 /* pack a message at a time */ 294 CHKMEMQ; 295 for (j=0; j<sstarts[i+1]-sstarts[i]; j++){ 296 for (k=0; k<ncols; k++) { 297 svalues[ncols*(sstarts[i] + j) + k] = b[sindices[sstarts[i]+j] + nrowsB*k]; 298 } 299 } 300 CHKMEMQ; 301 ierr = MPI_Isend(svalues+ncols*sstarts[i],ncols*(sstarts[i+1]-sstarts[i]),MPIU_SCALAR,sprocs[i],tag,comm,swaits+i);CHKERRQ(ierr); 302 } 303 304 nrecvs = from->n; 305 while (nrecvs) { 306 ierr = MPI_Waitany(from->n,rwaits,&imdex,&status);CHKERRQ(ierr); 307 nrecvs--; 308 /* unpack a message at a time */ 309 CHKMEMQ; 310 for (j=0; j<rstarts[imdex+1]-rstarts[imdex]; j++){ 311 for (k=0; k<ncols; k++) { 312 w[rindices[rstarts[imdex]+j] + nrows*k] = rvalues[ncols*(rstarts[imdex] + j) + k]; 313 } 314 } 315 CHKMEMQ; 316 } 317 if (to->n) {ierr = MPI_Waitall(to->n,swaits,to->sstatus);CHKERRQ(ierr);} 318 319 ierr = MatRestoreArray(B,&b);CHKERRQ(ierr); 320 ierr = MatRestoreArray(workB,&w);CHKERRQ(ierr); 321 ierr = MatAssemblyBegin(workB,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 322 ierr = MatAssemblyEnd(workB,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 323 PetscFunctionReturn(0); 324 } 325 extern PetscErrorCode MatMatMultNumericAdd_SeqAIJ_SeqDense(Mat,Mat,Mat); 326 327 #undef __FUNCT__ 328 #define __FUNCT__ "MatMatMultNumeric_MPIAIJ_MPIDense" 329 PetscErrorCode MatMatMultNumeric_MPIAIJ_MPIDense(Mat A,Mat B,Mat C) 330 { 331 PetscErrorCode ierr; 332 Mat_MPIAIJ *aij = (Mat_MPIAIJ*)A->data; 333 Mat_MPIDense *bdense = (Mat_MPIDense*)B->data; 334 Mat_MPIDense *cdense = (Mat_MPIDense*)C->data; 335 Mat workB; 336 337 PetscFunctionBegin; 338 339 /* diagonal block of A times all local rows of B*/ 340 ierr = MatMatMultNumeric_SeqAIJ_SeqDense(aij->A,bdense->A,cdense->A);CHKERRQ(ierr); 341 342 /* get off processor parts of B needed to complete the product */ 343 ierr = MatMPIDenseScatter(A,B,C,&workB);CHKERRQ(ierr); 344 345 /* off-diagonal block of A times nonlocal rows of B */ 346 ierr = MatMatMultNumericAdd_SeqAIJ_SeqDense(aij->B,workB,cdense->A);CHKERRQ(ierr); 347 ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 348 ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 349 PetscFunctionReturn(0); 350 } 351 352