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 Mat_MatMatMultMPI *mult; 103 PetscContainer container; 104 Mat AB,*seq; 105 Mat_MPIAIJ *a=(Mat_MPIAIJ*)A->data; 106 PetscInt *idx,i,start,ncols,nzA,nzB,*cmap,imark; 107 108 PetscFunctionBegin; 109 if (A->cmap->rstart != B->rmap->rstart || A->cmap->rend != B->rmap->rend){ 110 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); 111 } 112 ierr = PetscNew(Mat_MatMatMultMPI,&mult);CHKERRQ(ierr); 113 114 /* get isrowb: nonzero col of A */ 115 start = A->cmap->rstart; 116 cmap = a->garray; 117 nzA = a->A->cmap->n; 118 nzB = a->B->cmap->n; 119 ierr = PetscMalloc((nzA+nzB)*sizeof(PetscInt), &idx);CHKERRQ(ierr); 120 ncols = 0; 121 for (i=0; i<nzB; i++) { /* row < local row index */ 122 if (cmap[i] < start) idx[ncols++] = cmap[i]; 123 else break; 124 } 125 imark = i; 126 for (i=0; i<nzA; i++) idx[ncols++] = start + i; /* local rows */ 127 for (i=imark; i<nzB; i++) idx[ncols++] = cmap[i]; /* row > local row index */ 128 ierr = ISCreateGeneral(PETSC_COMM_SELF,ncols,idx,PETSC_OWN_POINTER,&mult->isrowb);CHKERRQ(ierr); 129 ierr = ISCreateStride(PETSC_COMM_SELF,B->cmap->N,0,1,&mult->iscolb);CHKERRQ(ierr); 130 131 /* get isrowa: all local rows of A */ 132 ierr = ISCreateStride(PETSC_COMM_SELF,A->rmap->n,A->rmap->rstart,1,&mult->isrowa);CHKERRQ(ierr); 133 134 /* Below should go to MatMatMultNumeric_MPIAIJ_MPIAIJ() - How to generate C there? */ 135 /* create a seq matrix B_seq = submatrix of B by taking rows of B that equal to nonzero col of A */ 136 ierr = MatGetSubMatrices(B,1,&mult->isrowb,&mult->iscolb,MAT_INITIAL_MATRIX,&seq);CHKERRQ(ierr); 137 mult->B_seq = *seq; 138 ierr = PetscFree(seq);CHKERRQ(ierr); 139 140 /* create a seq matrix A_seq = submatrix of A by taking all local rows of A */ 141 ierr = MatGetSubMatrices(A,1,&mult->isrowa,&mult->isrowb,MAT_INITIAL_MATRIX,&seq);CHKERRQ(ierr); 142 mult->A_loc = *seq; 143 ierr = PetscFree(seq);CHKERRQ(ierr); 144 145 /* compute C_seq = A_seq * B_seq */ 146 ierr = MatMatMult_SeqAIJ_SeqAIJ(mult->A_loc,mult->B_seq,MAT_INITIAL_MATRIX,fill,&mult->C_seq);CHKERRQ(ierr); 147 148 /* create mpi matrix C by concatinating C_seq */ 149 ierr = PetscObjectReference((PetscObject)mult->C_seq);CHKERRQ(ierr); /* prevent C_seq being destroyed by MatMerge() */ 150 ierr = MatMerge(((PetscObject)A)->comm,mult->C_seq,B->cmap->n,MAT_INITIAL_MATRIX,&AB);CHKERRQ(ierr); 151 152 /* attach the supporting struct to C for reuse of symbolic C */ 153 ierr = PetscContainerCreate(PETSC_COMM_SELF,&container);CHKERRQ(ierr); 154 ierr = PetscContainerSetPointer(container,mult);CHKERRQ(ierr); 155 ierr = PetscContainerSetUserDestroy(container,PetscContainerDestroy_Mat_MatMatMultMPI);CHKERRQ(ierr); 156 ierr = PetscObjectCompose((PetscObject)AB,"Mat_MatMatMultMPI",(PetscObject)container);CHKERRQ(ierr); 157 ierr = PetscContainerDestroy(&container);CHKERRQ(ierr); 158 mult->destroy = AB->ops->destroy; 159 mult->duplicate = AB->ops->duplicate; 160 AB->ops->destroy = MatDestroy_MPIAIJ_MatMatMult; 161 AB->ops->duplicate = MatDuplicate_MPIAIJ_MatMatMult; 162 *C = AB; 163 PetscFunctionReturn(0); 164 } 165 166 /* This routine is called ONLY in the case of reusing previously computed symbolic C */ 167 #undef __FUNCT__ 168 #define __FUNCT__ "MatMatMultNumeric_MPIAIJ_MPIAIJ" 169 PetscErrorCode MatMatMultNumeric_MPIAIJ_MPIAIJ(Mat A,Mat B,Mat C) 170 { 171 PetscErrorCode ierr; 172 Mat *seq; 173 Mat_MatMatMultMPI *mult; 174 PetscContainer container; 175 176 PetscFunctionBegin; 177 ierr = PetscObjectQuery((PetscObject)C,"Mat_MatMatMultMPI",(PetscObject *)&container);CHKERRQ(ierr); 178 if (!container) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Container does not exit"); 179 ierr = PetscContainerGetPointer(container,(void **)&mult);CHKERRQ(ierr); 180 seq = &mult->B_seq; 181 ierr = MatGetSubMatrices(B,1,&mult->isrowb,&mult->iscolb,MAT_REUSE_MATRIX,&seq);CHKERRQ(ierr); 182 mult->B_seq = *seq; 183 184 seq = &mult->A_loc; 185 ierr = MatGetSubMatrices(A,1,&mult->isrowa,&mult->isrowb,MAT_REUSE_MATRIX,&seq);CHKERRQ(ierr); 186 mult->A_loc = *seq; 187 188 ierr = MatMatMult_SeqAIJ_SeqAIJ(mult->A_loc,mult->B_seq,MAT_REUSE_MATRIX,0.0,&mult->C_seq);CHKERRQ(ierr); 189 190 ierr = PetscObjectReference((PetscObject)mult->C_seq);CHKERRQ(ierr); 191 ierr = MatMerge(((PetscObject)A)->comm,mult->C_seq,B->cmap->n,MAT_REUSE_MATRIX,&C);CHKERRQ(ierr); 192 PetscFunctionReturn(0); 193 } 194 195 #undef __FUNCT__ 196 #define __FUNCT__ "MatMatMult_MPIAIJ_MPIDense" 197 PetscErrorCode MatMatMult_MPIAIJ_MPIDense(Mat A,Mat B,MatReuse scall,PetscReal fill,Mat *C) 198 { 199 PetscErrorCode ierr; 200 201 PetscFunctionBegin; 202 if (scall == MAT_INITIAL_MATRIX){ 203 ierr = MatMatMultSymbolic_MPIAIJ_MPIDense(A,B,fill,C);CHKERRQ(ierr); 204 } 205 ierr = MatMatMultNumeric_MPIAIJ_MPIDense(A,B,*C);CHKERRQ(ierr); 206 PetscFunctionReturn(0); 207 } 208 209 typedef struct { 210 Mat workB; 211 PetscScalar *rvalues,*svalues; 212 MPI_Request *rwaits,*swaits; 213 } MPIAIJ_MPIDense; 214 215 #undef __FUNCT__ 216 #define __FUNCT__ "MPIAIJ_MPIDenseDestroy" 217 PetscErrorCode MPIAIJ_MPIDenseDestroy(void *ctx) 218 { 219 MPIAIJ_MPIDense *contents = (MPIAIJ_MPIDense*) ctx; 220 PetscErrorCode ierr; 221 222 PetscFunctionBegin; 223 ierr = MatDestroy(&contents->workB);CHKERRQ(ierr); 224 ierr = PetscFree4(contents->rvalues,contents->svalues,contents->rwaits,contents->swaits);CHKERRQ(ierr); 225 ierr = PetscFree(contents);CHKERRQ(ierr); 226 PetscFunctionReturn(0); 227 } 228 229 #undef __FUNCT__ 230 #define __FUNCT__ "MatMatMultSymbolic_MPIAIJ_MPIDense" 231 PetscErrorCode MatMatMultSymbolic_MPIAIJ_MPIDense(Mat A,Mat B,PetscReal fill,Mat *C) 232 { 233 PetscErrorCode ierr; 234 Mat_MPIAIJ *aij = (Mat_MPIAIJ*) A->data; 235 PetscInt nz = aij->B->cmap->n; 236 PetscContainer container; 237 MPIAIJ_MPIDense *contents; 238 VecScatter ctx = aij->Mvctx; 239 VecScatter_MPI_General *from = (VecScatter_MPI_General*) ctx->fromdata; 240 VecScatter_MPI_General *to = ( VecScatter_MPI_General*) ctx->todata; 241 PetscInt m=A->rmap->n,n=B->cmap->n; 242 243 PetscFunctionBegin; 244 ierr = MatCreate(((PetscObject)B)->comm,C);CHKERRQ(ierr); 245 ierr = MatSetSizes(*C,m,n,A->rmap->N,B->cmap->N);CHKERRQ(ierr); 246 ierr = MatSetType(*C,MATMPIDENSE);CHKERRQ(ierr); 247 ierr = MatAssemblyBegin(*C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 248 ierr = MatAssemblyEnd(*C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 249 250 ierr = PetscNew(MPIAIJ_MPIDense,&contents);CHKERRQ(ierr); 251 /* Create work matrix used to store off processor rows of B needed for local product */ 252 ierr = MatCreateSeqDense(PETSC_COMM_SELF,nz,B->cmap->N,PETSC_NULL,&contents->workB);CHKERRQ(ierr); 253 /* Create work arrays needed */ 254 ierr = PetscMalloc4(B->cmap->N*from->starts[from->n],PetscScalar,&contents->rvalues, 255 B->cmap->N*to->starts[to->n],PetscScalar,&contents->svalues, 256 from->n,MPI_Request,&contents->rwaits, 257 to->n,MPI_Request,&contents->swaits);CHKERRQ(ierr); 258 259 ierr = PetscContainerCreate(((PetscObject)A)->comm,&container);CHKERRQ(ierr); 260 ierr = PetscContainerSetPointer(container,contents);CHKERRQ(ierr); 261 ierr = PetscContainerSetUserDestroy(container,MPIAIJ_MPIDenseDestroy);CHKERRQ(ierr); 262 ierr = PetscObjectCompose((PetscObject)(*C),"workB",(PetscObject)container);CHKERRQ(ierr); 263 ierr = PetscContainerDestroy(&container);CHKERRQ(ierr); 264 PetscFunctionReturn(0); 265 } 266 267 #undef __FUNCT__ 268 #define __FUNCT__ "MatMPIDenseScatter" 269 /* 270 Performs an efficient scatter on the rows of B needed by this process; this is 271 a modification of the VecScatterBegin_() routines. 272 */ 273 PetscErrorCode MatMPIDenseScatter(Mat A,Mat B,Mat C,Mat *outworkB) 274 { 275 Mat_MPIAIJ *aij = (Mat_MPIAIJ*)A->data; 276 PetscErrorCode ierr; 277 PetscScalar *b,*w,*svalues,*rvalues; 278 VecScatter ctx = aij->Mvctx; 279 VecScatter_MPI_General *from = (VecScatter_MPI_General*) ctx->fromdata; 280 VecScatter_MPI_General *to = ( VecScatter_MPI_General*) ctx->todata; 281 PetscInt i,j,k; 282 PetscInt *sindices,*sstarts,*rindices,*rstarts; 283 PetscMPIInt *sprocs,*rprocs,nrecvs; 284 MPI_Request *swaits,*rwaits; 285 MPI_Comm comm = ((PetscObject)A)->comm; 286 PetscMPIInt tag = ((PetscObject)ctx)->tag,ncols = B->cmap->N, nrows = aij->B->cmap->n,imdex,nrowsB = B->rmap->n; 287 MPI_Status status; 288 MPIAIJ_MPIDense *contents; 289 PetscContainer container; 290 Mat workB; 291 292 PetscFunctionBegin; 293 ierr = PetscObjectQuery((PetscObject)C,"workB",(PetscObject*)&container);CHKERRQ(ierr); 294 if (!container) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Container does not exit"); 295 ierr = PetscContainerGetPointer(container,(void**)&contents);CHKERRQ(ierr); 296 297 workB = *outworkB = contents->workB; 298 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); 299 sindices = to->indices; 300 sstarts = to->starts; 301 sprocs = to->procs; 302 swaits = contents->swaits; 303 svalues = contents->svalues; 304 305 rindices = from->indices; 306 rstarts = from->starts; 307 rprocs = from->procs; 308 rwaits = contents->rwaits; 309 rvalues = contents->rvalues; 310 311 ierr = MatGetArray(B,&b);CHKERRQ(ierr); 312 ierr = MatGetArray(workB,&w);CHKERRQ(ierr); 313 314 for (i=0; i<from->n; i++) { 315 ierr = MPI_Irecv(rvalues+ncols*rstarts[i],ncols*(rstarts[i+1]-rstarts[i]),MPIU_SCALAR,rprocs[i],tag,comm,rwaits+i);CHKERRQ(ierr); 316 } 317 318 for (i=0; i<to->n; i++) { 319 /* pack a message at a time */ 320 CHKMEMQ; 321 for (j=0; j<sstarts[i+1]-sstarts[i]; j++){ 322 for (k=0; k<ncols; k++) { 323 svalues[ncols*(sstarts[i] + j) + k] = b[sindices[sstarts[i]+j] + nrowsB*k]; 324 } 325 } 326 CHKMEMQ; 327 ierr = MPI_Isend(svalues+ncols*sstarts[i],ncols*(sstarts[i+1]-sstarts[i]),MPIU_SCALAR,sprocs[i],tag,comm,swaits+i);CHKERRQ(ierr); 328 } 329 330 nrecvs = from->n; 331 while (nrecvs) { 332 ierr = MPI_Waitany(from->n,rwaits,&imdex,&status);CHKERRQ(ierr); 333 nrecvs--; 334 /* unpack a message at a time */ 335 CHKMEMQ; 336 for (j=0; j<rstarts[imdex+1]-rstarts[imdex]; j++){ 337 for (k=0; k<ncols; k++) { 338 w[rindices[rstarts[imdex]+j] + nrows*k] = rvalues[ncols*(rstarts[imdex] + j) + k]; 339 } 340 } 341 CHKMEMQ; 342 } 343 if (to->n) {ierr = MPI_Waitall(to->n,swaits,to->sstatus);CHKERRQ(ierr);} 344 345 ierr = MatRestoreArray(B,&b);CHKERRQ(ierr); 346 ierr = MatRestoreArray(workB,&w);CHKERRQ(ierr); 347 ierr = MatAssemblyBegin(workB,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 348 ierr = MatAssemblyEnd(workB,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 349 PetscFunctionReturn(0); 350 } 351 extern PetscErrorCode MatMatMultNumericAdd_SeqAIJ_SeqDense(Mat,Mat,Mat); 352 353 #undef __FUNCT__ 354 #define __FUNCT__ "MatMatMultNumeric_MPIAIJ_MPIDense" 355 PetscErrorCode MatMatMultNumeric_MPIAIJ_MPIDense(Mat A,Mat B,Mat C) 356 { 357 PetscErrorCode ierr; 358 Mat_MPIAIJ *aij = (Mat_MPIAIJ*)A->data; 359 Mat_MPIDense *bdense = (Mat_MPIDense*)B->data; 360 Mat_MPIDense *cdense = (Mat_MPIDense*)C->data; 361 Mat workB; 362 363 PetscFunctionBegin; 364 365 /* diagonal block of A times all local rows of B*/ 366 ierr = MatMatMultNumeric_SeqAIJ_SeqDense(aij->A,bdense->A,cdense->A);CHKERRQ(ierr); 367 368 /* get off processor parts of B needed to complete the product */ 369 ierr = MatMPIDenseScatter(A,B,C,&workB);CHKERRQ(ierr); 370 371 /* off-diagonal block of A times nonlocal rows of B */ 372 ierr = MatMatMultNumericAdd_SeqAIJ_SeqDense(aij->B,workB,cdense->A);CHKERRQ(ierr); 373 ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 374 ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 375 PetscFunctionReturn(0); 376 } 377 378