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 Mat *aloc; 106 107 PetscFunctionBegin; 108 if (A->cmap->rstart != B->rmap->rstart || A->cmap->rend != B->rmap->rend){ 109 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); 110 } 111 ierr = PetscNew(Mat_MatMatMultMPI,&mult);CHKERRQ(ierr); 112 113 /* create a seq matrix B_seq = submatrix of B by taking rows of B that equal to nonzero col of A */ 114 ierr = MatGetBrowsOfAcols(A,B,MAT_INITIAL_MATRIX,&mult->isrowb,&mult->iscolb,&mult->B_seq);CHKERRQ(ierr); 115 116 /* create a seq matrix A_seq = submatrix of A by taking all local rows of A */ 117 start = A->rmap->rstart; end = A->rmap->rend; 118 ierr = ISCreateStride(PETSC_COMM_SELF,end-start,start,1,&mult->isrowa);CHKERRQ(ierr); 119 ierr = MatGetSubMatrices(A,1,&mult->isrowa,&mult->isrowb,MAT_INITIAL_MATRIX,&aloc);CHKERRQ(ierr); 120 mult->A_loc = aloc[0]; 121 ierr = PetscFree(aloc);CHKERRQ(ierr); 122 123 /* compute C_seq = A_seq * B_seq */ 124 ierr = MatMatMult_SeqAIJ_SeqAIJ(mult->A_loc,mult->B_seq,MAT_INITIAL_MATRIX,fill,&mult->C_seq);CHKERRQ(ierr); 125 126 /* create mpi matrix C by concatinating C_seq */ 127 ierr = PetscObjectReference((PetscObject)mult->C_seq);CHKERRQ(ierr); /* prevent C_seq being destroyed by MatMerge() */ 128 ierr = MatMerge(((PetscObject)A)->comm,mult->C_seq,B->cmap->n,MAT_INITIAL_MATRIX,C);CHKERRQ(ierr); 129 130 /* attach the supporting struct to C for reuse of symbolic C */ 131 ierr = PetscContainerCreate(PETSC_COMM_SELF,&container);CHKERRQ(ierr); 132 ierr = PetscContainerSetPointer(container,mult);CHKERRQ(ierr); 133 ierr = PetscContainerSetUserDestroy(container,PetscContainerDestroy_Mat_MatMatMultMPI);CHKERRQ(ierr); 134 ierr = PetscObjectCompose((PetscObject)(*C),"Mat_MatMatMultMPI",(PetscObject)container);CHKERRQ(ierr); 135 ierr = PetscContainerDestroy(&container);CHKERRQ(ierr); 136 mult->destroy = (*C)->ops->destroy; 137 mult->duplicate = (*C)->ops->duplicate; 138 (*C)->ops->destroy = MatDestroy_MPIAIJ_MatMatMult; 139 (*C)->ops->duplicate = MatDuplicate_MPIAIJ_MatMatMult; 140 141 PetscFunctionReturn(0); 142 } 143 144 /* This routine is called ONLY in the case of reusing previously computed symbolic C */ 145 #undef __FUNCT__ 146 #define __FUNCT__ "MatMatMultNumeric_MPIAIJ_MPIAIJ" 147 PetscErrorCode MatMatMultNumeric_MPIAIJ_MPIAIJ(Mat A,Mat B,Mat C) 148 { 149 PetscErrorCode ierr; 150 Mat *seq; 151 Mat_MatMatMultMPI *mult; 152 PetscContainer container; 153 154 PetscFunctionBegin; 155 ierr = PetscObjectQuery((PetscObject)C,"Mat_MatMatMultMPI",(PetscObject *)&container);CHKERRQ(ierr); 156 if (!container) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Container does not exit"); 157 ierr = PetscContainerGetPointer(container,(void **)&mult);CHKERRQ(ierr); 158 seq = &mult->B_seq; 159 ierr = MatGetSubMatrices(B,1,&mult->isrowb,&mult->iscolb,MAT_REUSE_MATRIX,&seq);CHKERRQ(ierr); 160 mult->B_seq = *seq; 161 162 seq = &mult->A_loc; 163 ierr = MatGetSubMatrices(A,1,&mult->isrowa,&mult->isrowb,MAT_REUSE_MATRIX,&seq);CHKERRQ(ierr); 164 mult->A_loc = *seq; 165 166 ierr = MatMatMult_SeqAIJ_SeqAIJ(mult->A_loc,mult->B_seq,MAT_REUSE_MATRIX,0.0,&mult->C_seq);CHKERRQ(ierr); 167 168 ierr = PetscObjectReference((PetscObject)mult->C_seq);CHKERRQ(ierr); 169 ierr = MatMerge(((PetscObject)A)->comm,mult->C_seq,B->cmap->n,MAT_REUSE_MATRIX,&C);CHKERRQ(ierr); 170 PetscFunctionReturn(0); 171 } 172 173 #undef __FUNCT__ 174 #define __FUNCT__ "MatMatMult_MPIAIJ_MPIDense" 175 PetscErrorCode MatMatMult_MPIAIJ_MPIDense(Mat A,Mat B,MatReuse scall,PetscReal fill,Mat *C) 176 { 177 PetscErrorCode ierr; 178 179 PetscFunctionBegin; 180 if (scall == MAT_INITIAL_MATRIX){ 181 ierr = MatMatMultSymbolic_MPIAIJ_MPIDense(A,B,fill,C);CHKERRQ(ierr); 182 } 183 ierr = MatMatMultNumeric_MPIAIJ_MPIDense(A,B,*C);CHKERRQ(ierr); 184 PetscFunctionReturn(0); 185 } 186 187 typedef struct { 188 Mat workB; 189 PetscScalar *rvalues,*svalues; 190 MPI_Request *rwaits,*swaits; 191 } MPIAIJ_MPIDense; 192 193 #undef __FUNCT__ 194 #define __FUNCT__ "MPIAIJ_MPIDenseDestroy" 195 PetscErrorCode MPIAIJ_MPIDenseDestroy(void *ctx) 196 { 197 MPIAIJ_MPIDense *contents = (MPIAIJ_MPIDense*) ctx; 198 PetscErrorCode ierr; 199 200 PetscFunctionBegin; 201 ierr = MatDestroy(&contents->workB);CHKERRQ(ierr); 202 ierr = PetscFree4(contents->rvalues,contents->svalues,contents->rwaits,contents->swaits);CHKERRQ(ierr); 203 ierr = PetscFree(contents);CHKERRQ(ierr); 204 PetscFunctionReturn(0); 205 } 206 207 #undef __FUNCT__ 208 #define __FUNCT__ "MatMatMultSymbolic_MPIAIJ_MPIDense" 209 PetscErrorCode MatMatMultSymbolic_MPIAIJ_MPIDense(Mat A,Mat B,PetscReal fill,Mat *C) 210 { 211 PetscErrorCode ierr; 212 Mat_MPIAIJ *aij = (Mat_MPIAIJ*) A->data; 213 PetscInt nz = aij->B->cmap->n; 214 PetscContainer container; 215 MPIAIJ_MPIDense *contents; 216 VecScatter ctx = aij->Mvctx; 217 VecScatter_MPI_General *from = (VecScatter_MPI_General*) ctx->fromdata; 218 VecScatter_MPI_General *to = ( VecScatter_MPI_General*) ctx->todata; 219 PetscInt m=A->rmap->n,n=B->cmap->n; 220 221 PetscFunctionBegin; 222 ierr = MatCreate(((PetscObject)B)->comm,C);CHKERRQ(ierr); 223 ierr = MatSetSizes(*C,m,n,A->rmap->N,B->cmap->N);CHKERRQ(ierr); 224 ierr = MatSetType(*C,MATMPIDENSE);CHKERRQ(ierr); 225 ierr = MatAssemblyBegin(*C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 226 ierr = MatAssemblyEnd(*C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 227 228 ierr = PetscNew(MPIAIJ_MPIDense,&contents);CHKERRQ(ierr); 229 /* Create work matrix used to store off processor rows of B needed for local product */ 230 ierr = MatCreateSeqDense(PETSC_COMM_SELF,nz,B->cmap->N,PETSC_NULL,&contents->workB);CHKERRQ(ierr); 231 /* Create work arrays needed */ 232 ierr = PetscMalloc4(B->cmap->N*from->starts[from->n],PetscScalar,&contents->rvalues, 233 B->cmap->N*to->starts[to->n],PetscScalar,&contents->svalues, 234 from->n,MPI_Request,&contents->rwaits, 235 to->n,MPI_Request,&contents->swaits);CHKERRQ(ierr); 236 237 ierr = PetscContainerCreate(((PetscObject)A)->comm,&container);CHKERRQ(ierr); 238 ierr = PetscContainerSetPointer(container,contents);CHKERRQ(ierr); 239 ierr = PetscContainerSetUserDestroy(container,MPIAIJ_MPIDenseDestroy);CHKERRQ(ierr); 240 ierr = PetscObjectCompose((PetscObject)(*C),"workB",(PetscObject)container);CHKERRQ(ierr); 241 ierr = PetscContainerDestroy(&container);CHKERRQ(ierr); 242 PetscFunctionReturn(0); 243 } 244 245 #undef __FUNCT__ 246 #define __FUNCT__ "MatMPIDenseScatter" 247 /* 248 Performs an efficient scatter on the rows of B needed by this process; this is 249 a modification of the VecScatterBegin_() routines. 250 */ 251 PetscErrorCode MatMPIDenseScatter(Mat A,Mat B,Mat C,Mat *outworkB) 252 { 253 Mat_MPIAIJ *aij = (Mat_MPIAIJ*)A->data; 254 PetscErrorCode ierr; 255 PetscScalar *b,*w,*svalues,*rvalues; 256 VecScatter ctx = aij->Mvctx; 257 VecScatter_MPI_General *from = (VecScatter_MPI_General*) ctx->fromdata; 258 VecScatter_MPI_General *to = ( VecScatter_MPI_General*) ctx->todata; 259 PetscInt i,j,k; 260 PetscInt *sindices,*sstarts,*rindices,*rstarts; 261 PetscMPIInt *sprocs,*rprocs,nrecvs; 262 MPI_Request *swaits,*rwaits; 263 MPI_Comm comm = ((PetscObject)A)->comm; 264 PetscMPIInt tag = ((PetscObject)ctx)->tag,ncols = B->cmap->N, nrows = aij->B->cmap->n,imdex,nrowsB = B->rmap->n; 265 MPI_Status status; 266 MPIAIJ_MPIDense *contents; 267 PetscContainer container; 268 Mat workB; 269 270 PetscFunctionBegin; 271 ierr = PetscObjectQuery((PetscObject)C,"workB",(PetscObject*)&container);CHKERRQ(ierr); 272 if (!container) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Container does not exit"); 273 ierr = PetscContainerGetPointer(container,(void**)&contents);CHKERRQ(ierr); 274 275 workB = *outworkB = contents->workB; 276 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); 277 sindices = to->indices; 278 sstarts = to->starts; 279 sprocs = to->procs; 280 swaits = contents->swaits; 281 svalues = contents->svalues; 282 283 rindices = from->indices; 284 rstarts = from->starts; 285 rprocs = from->procs; 286 rwaits = contents->rwaits; 287 rvalues = contents->rvalues; 288 289 ierr = MatGetArray(B,&b);CHKERRQ(ierr); 290 ierr = MatGetArray(workB,&w);CHKERRQ(ierr); 291 292 for (i=0; i<from->n; i++) { 293 ierr = MPI_Irecv(rvalues+ncols*rstarts[i],ncols*(rstarts[i+1]-rstarts[i]),MPIU_SCALAR,rprocs[i],tag,comm,rwaits+i);CHKERRQ(ierr); 294 } 295 296 for (i=0; i<to->n; i++) { 297 /* pack a message at a time */ 298 CHKMEMQ; 299 for (j=0; j<sstarts[i+1]-sstarts[i]; j++){ 300 for (k=0; k<ncols; k++) { 301 svalues[ncols*(sstarts[i] + j) + k] = b[sindices[sstarts[i]+j] + nrowsB*k]; 302 } 303 } 304 CHKMEMQ; 305 ierr = MPI_Isend(svalues+ncols*sstarts[i],ncols*(sstarts[i+1]-sstarts[i]),MPIU_SCALAR,sprocs[i],tag,comm,swaits+i);CHKERRQ(ierr); 306 } 307 308 nrecvs = from->n; 309 while (nrecvs) { 310 ierr = MPI_Waitany(from->n,rwaits,&imdex,&status);CHKERRQ(ierr); 311 nrecvs--; 312 /* unpack a message at a time */ 313 CHKMEMQ; 314 for (j=0; j<rstarts[imdex+1]-rstarts[imdex]; j++){ 315 for (k=0; k<ncols; k++) { 316 w[rindices[rstarts[imdex]+j] + nrows*k] = rvalues[ncols*(rstarts[imdex] + j) + k]; 317 } 318 } 319 CHKMEMQ; 320 } 321 if (to->n) {ierr = MPI_Waitall(to->n,swaits,to->sstatus);CHKERRQ(ierr);} 322 323 ierr = MatRestoreArray(B,&b);CHKERRQ(ierr); 324 ierr = MatRestoreArray(workB,&w);CHKERRQ(ierr); 325 ierr = MatAssemblyBegin(workB,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 326 ierr = MatAssemblyEnd(workB,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 327 PetscFunctionReturn(0); 328 } 329 extern PetscErrorCode MatMatMultNumericAdd_SeqAIJ_SeqDense(Mat,Mat,Mat); 330 331 #undef __FUNCT__ 332 #define __FUNCT__ "MatMatMultNumeric_MPIAIJ_MPIDense" 333 PetscErrorCode MatMatMultNumeric_MPIAIJ_MPIDense(Mat A,Mat B,Mat C) 334 { 335 PetscErrorCode ierr; 336 Mat_MPIAIJ *aij = (Mat_MPIAIJ*)A->data; 337 Mat_MPIDense *bdense = (Mat_MPIDense*)B->data; 338 Mat_MPIDense *cdense = (Mat_MPIDense*)C->data; 339 Mat workB; 340 341 PetscFunctionBegin; 342 343 /* diagonal block of A times all local rows of B*/ 344 ierr = MatMatMultNumeric_SeqAIJ_SeqDense(aij->A,bdense->A,cdense->A);CHKERRQ(ierr); 345 346 /* get off processor parts of B needed to complete the product */ 347 ierr = MatMPIDenseScatter(A,B,C,&workB);CHKERRQ(ierr); 348 349 /* off-diagonal block of A times nonlocal rows of B */ 350 ierr = MatMatMultNumericAdd_SeqAIJ_SeqDense(aij->B,workB,cdense->A);CHKERRQ(ierr); 351 ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 352 ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 353 PetscFunctionReturn(0); 354 } 355 356