1 #include <../src/ksp/pc/impls/bddc/bddc.h> 2 #include <../src/ksp/pc/impls/bddc/bddcprivate.h> 3 #include <petscblaslapack.h> 4 5 PETSC_STATIC_INLINE PetscErrorCode PCBDDCAdjGetNextLayer_Private(PetscInt*,PetscInt,PetscBT,PetscInt*,PetscInt*,PetscInt*); 6 static PetscErrorCode PCBDDCComputeExplicitSchur(Mat,PetscBool,MatReuse,Mat*); 7 static PetscErrorCode PCBDDCMumpsInteriorSolve(PC,Vec,Vec); 8 static PetscErrorCode PCBDDCMumpsCorrectionSolve(PC,Vec,Vec); 9 10 #undef __FUNCT__ 11 #define __FUNCT__ "PCBDDCMumpsCorrectionSolve_Private" 12 static PetscErrorCode PCBDDCMumpsCorrectionSolve_Private(PC pc, Vec rhs, Vec sol, PetscBool transpose) 13 { 14 PCBDDCReuseMumps ctx; 15 #if defined(PETSC_HAVE_MUMPS) 16 PetscInt ival; 17 #endif 18 PetscErrorCode ierr; 19 20 PetscFunctionBegin; 21 ierr = PCShellGetContext(pc,(void **)&ctx);CHKERRQ(ierr); 22 #if defined(PETSC_HAVE_MUMPS) 23 ierr = MatMumpsGetIcntl(ctx->F,26,&ival);CHKERRQ(ierr); 24 ierr = MatMumpsSetIcntl(ctx->F,26,-1);CHKERRQ(ierr); 25 #endif 26 if (transpose) { 27 ierr = MatSolveTranspose(ctx->F,rhs,sol);CHKERRQ(ierr); 28 } else { 29 ierr = MatSolve(ctx->F,rhs,sol);CHKERRQ(ierr); 30 } 31 #if defined(PETSC_HAVE_MUMPS) 32 ierr = MatMumpsSetIcntl(ctx->F,26,ival);CHKERRQ(ierr); 33 #endif 34 PetscFunctionReturn(0); 35 } 36 37 #undef __FUNCT__ 38 #define __FUNCT__ "PCBDDCMumpsCorrectionSolve" 39 static PetscErrorCode PCBDDCMumpsCorrectionSolve(PC pc, Vec rhs, Vec sol) 40 { 41 PetscErrorCode ierr; 42 43 PetscFunctionBegin; 44 ierr = PCBDDCMumpsCorrectionSolve_Private(pc,rhs,sol,PETSC_FALSE);CHKERRQ(ierr); 45 PetscFunctionReturn(0); 46 } 47 48 #undef __FUNCT__ 49 #define __FUNCT__ "PCBDDCMumpsCorrectionSolveTranspose" 50 static PetscErrorCode PCBDDCMumpsCorrectionSolveTranspose(PC pc, Vec rhs, Vec sol) 51 { 52 PetscErrorCode ierr; 53 54 PetscFunctionBegin; 55 ierr = PCBDDCMumpsCorrectionSolve_Private(pc,rhs,sol,PETSC_TRUE);CHKERRQ(ierr); 56 PetscFunctionReturn(0); 57 } 58 59 #undef __FUNCT__ 60 #define __FUNCT__ "PCBDDCReuseMumpsReset" 61 static PetscErrorCode PCBDDCReuseMumpsReset(PCBDDCReuseMumps reuse) 62 { 63 PetscErrorCode ierr; 64 65 PetscFunctionBegin; 66 ierr = MatDestroy(&reuse->F);CHKERRQ(ierr); 67 ierr = VecDestroy(&reuse->sol);CHKERRQ(ierr); 68 ierr = VecDestroy(&reuse->rhs);CHKERRQ(ierr); 69 ierr = PCDestroy(&reuse->interior_solver);CHKERRQ(ierr); 70 ierr = PCDestroy(&reuse->correction_solver);CHKERRQ(ierr); 71 ierr = ISDestroy(&reuse->is_R);CHKERRQ(ierr); 72 ierr = ISDestroy(&reuse->is_B);CHKERRQ(ierr); 73 ierr = VecScatterDestroy(&reuse->correction_scatter_B);CHKERRQ(ierr); 74 ierr = VecDestroy(&reuse->sol_B);CHKERRQ(ierr); 75 ierr = VecDestroy(&reuse->rhs_B);CHKERRQ(ierr); 76 PetscFunctionReturn(0); 77 } 78 79 #undef __FUNCT__ 80 #define __FUNCT__ "PCBDDCMumpsInteriorSolve_Private" 81 static PetscErrorCode PCBDDCMumpsInteriorSolve_Private(PC pc, Vec rhs, Vec sol, PetscBool transpose) 82 { 83 PCBDDCReuseMumps ctx; 84 PetscScalar *array,*array_mumps; 85 #if defined(PETSC_HAVE_MUMPS) 86 PetscInt ival; 87 #endif 88 PetscErrorCode ierr; 89 90 PetscFunctionBegin; 91 ierr = PCShellGetContext(pc,(void **)&ctx);CHKERRQ(ierr); 92 #if defined(PETSC_HAVE_MUMPS) 93 ierr = MatMumpsGetIcntl(ctx->F,26,&ival);CHKERRQ(ierr); 94 ierr = MatMumpsSetIcntl(ctx->F,26,0);CHKERRQ(ierr); 95 #endif 96 /* copy rhs into factored matrix workspace (can it be avoided?, MatSolve_MUMPS has another copy b->x internally) */ 97 ierr = VecGetArrayRead(rhs,(const PetscScalar**)&array);CHKERRQ(ierr); 98 ierr = VecGetArray(ctx->rhs,&array_mumps);CHKERRQ(ierr); 99 ierr = PetscMemcpy(array_mumps,array,ctx->n_I*sizeof(PetscScalar));CHKERRQ(ierr); 100 ierr = VecRestoreArray(ctx->rhs,&array_mumps);CHKERRQ(ierr); 101 ierr = VecRestoreArrayRead(rhs,(const PetscScalar**)&array);CHKERRQ(ierr); 102 103 if (transpose) { 104 ierr = MatSolveTranspose(ctx->F,ctx->rhs,ctx->sol);CHKERRQ(ierr); 105 } else { 106 ierr = MatSolve(ctx->F,ctx->rhs,ctx->sol);CHKERRQ(ierr); 107 } 108 109 /* get back data to caller worskpace */ 110 ierr = VecGetArrayRead(ctx->sol,(const PetscScalar**)&array_mumps);CHKERRQ(ierr); 111 ierr = VecGetArray(sol,&array);CHKERRQ(ierr); 112 ierr = PetscMemcpy(array,array_mumps,ctx->n_I*sizeof(PetscScalar));CHKERRQ(ierr); 113 ierr = VecRestoreArray(sol,&array);CHKERRQ(ierr); 114 ierr = VecRestoreArrayRead(ctx->sol,(const PetscScalar**)&array_mumps);CHKERRQ(ierr); 115 #if defined(PETSC_HAVE_MUMPS) 116 ierr = MatMumpsSetIcntl(ctx->F,26,ival);CHKERRQ(ierr); 117 #endif 118 PetscFunctionReturn(0); 119 } 120 121 #undef __FUNCT__ 122 #define __FUNCT__ "PCBDDCMumpsInteriorSolve" 123 static PetscErrorCode PCBDDCMumpsInteriorSolve(PC pc, Vec rhs, Vec sol) 124 { 125 PetscErrorCode ierr; 126 127 PetscFunctionBegin; 128 ierr = PCBDDCMumpsInteriorSolve_Private(pc,rhs,sol,PETSC_FALSE);CHKERRQ(ierr); 129 PetscFunctionReturn(0); 130 } 131 132 #undef __FUNCT__ 133 #define __FUNCT__ "PCBDDCMumpsInteriorSolveTranspose" 134 static PetscErrorCode PCBDDCMumpsInteriorSolveTranspose(PC pc, Vec rhs, Vec sol) 135 { 136 PetscErrorCode ierr; 137 138 PetscFunctionBegin; 139 ierr = PCBDDCMumpsInteriorSolve_Private(pc,rhs,sol,PETSC_TRUE);CHKERRQ(ierr); 140 PetscFunctionReturn(0); 141 } 142 143 #undef __FUNCT__ 144 #define __FUNCT__ "PCBDDCComputeExplicitSchur" 145 static PetscErrorCode PCBDDCComputeExplicitSchur(Mat M, PetscBool issym, MatReuse reuse, Mat *S) 146 { 147 Mat B, C, D, Bd, Cd, AinvBd; 148 KSP ksp; 149 PC pc; 150 PetscBool isLU, isILU, isCHOL, Bdense, Cdense; 151 PetscReal fill = 2.0; 152 PetscInt n_I; 153 PetscMPIInt size; 154 PetscErrorCode ierr; 155 156 PetscFunctionBegin; 157 ierr = MPI_Comm_size(PetscObjectComm((PetscObject)M),&size);CHKERRQ(ierr); 158 if (size != 1) { 159 SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"Not for parallel matrices"); 160 } 161 if (reuse == MAT_REUSE_MATRIX) { 162 PetscBool Sdense; 163 164 ierr = PetscObjectTypeCompare((PetscObject)*S, MATSEQDENSE, &Sdense);CHKERRQ(ierr); 165 if (!Sdense) { 166 SETERRQ(PetscObjectComm((PetscObject)M),PETSC_ERR_SUP,"S should dense"); 167 } 168 } 169 ierr = MatSchurComplementGetSubMatrices(M, NULL, NULL, &B, &C, &D);CHKERRQ(ierr); 170 ierr = MatSchurComplementGetKSP(M, &ksp);CHKERRQ(ierr); 171 ierr = KSPGetPC(ksp, &pc);CHKERRQ(ierr); 172 ierr = PetscObjectTypeCompare((PetscObject) pc, PCLU, &isLU);CHKERRQ(ierr); 173 ierr = PetscObjectTypeCompare((PetscObject) pc, PCILU, &isILU);CHKERRQ(ierr); 174 ierr = PetscObjectTypeCompare((PetscObject) pc, PCCHOLESKY, &isCHOL);CHKERRQ(ierr); 175 ierr = PetscObjectTypeCompare((PetscObject) B, MATSEQDENSE, &Bdense);CHKERRQ(ierr); 176 ierr = PetscObjectTypeCompare((PetscObject) C, MATSEQDENSE, &Cdense);CHKERRQ(ierr); 177 ierr = MatGetSize(B,&n_I,NULL);CHKERRQ(ierr); 178 if (n_I) { 179 if (!Bdense) { 180 ierr = MatConvert(B, MATSEQDENSE, MAT_INITIAL_MATRIX, &Bd);CHKERRQ(ierr); 181 } else { 182 Bd = B; 183 } 184 185 if (isLU || isILU || isCHOL) { 186 Mat fact; 187 ierr = KSPSetUp(ksp);CHKERRQ(ierr); 188 ierr = PCFactorGetMatrix(pc, &fact);CHKERRQ(ierr); 189 ierr = MatDuplicate(Bd, MAT_DO_NOT_COPY_VALUES, &AinvBd);CHKERRQ(ierr); 190 ierr = MatMatSolve(fact, Bd, AinvBd);CHKERRQ(ierr); 191 } else { 192 PetscBool ex = PETSC_TRUE; 193 194 if (ex) { 195 Mat Ainvd; 196 197 ierr = PCComputeExplicitOperator(pc, &Ainvd);CHKERRQ(ierr); 198 ierr = MatMatMult(Ainvd, Bd, MAT_INITIAL_MATRIX, fill, &AinvBd);CHKERRQ(ierr); 199 ierr = MatDestroy(&Ainvd);CHKERRQ(ierr); 200 } else { 201 Vec sol,rhs; 202 PetscScalar *arrayrhs,*arraysol; 203 PetscInt i,nrhs,n; 204 205 ierr = MatDuplicate(Bd, MAT_DO_NOT_COPY_VALUES, &AinvBd);CHKERRQ(ierr); 206 ierr = MatGetSize(Bd,&n,&nrhs);CHKERRQ(ierr); 207 ierr = MatDenseGetArray(Bd,&arrayrhs);CHKERRQ(ierr); 208 ierr = MatDenseGetArray(AinvBd,&arraysol);CHKERRQ(ierr); 209 ierr = KSPGetSolution(ksp,&sol);CHKERRQ(ierr); 210 ierr = KSPGetRhs(ksp,&rhs);CHKERRQ(ierr); 211 for (i=0;i<nrhs;i++) { 212 ierr = VecPlaceArray(rhs,arrayrhs+i*n);CHKERRQ(ierr); 213 ierr = VecPlaceArray(sol,arraysol+i*n);CHKERRQ(ierr); 214 ierr = KSPSolve(ksp,rhs,sol);CHKERRQ(ierr); 215 ierr = VecResetArray(rhs);CHKERRQ(ierr); 216 ierr = VecResetArray(sol);CHKERRQ(ierr); 217 } 218 ierr = MatDenseRestoreArray(Bd,&arrayrhs);CHKERRQ(ierr); 219 ierr = MatDenseRestoreArray(AinvBd,&arrayrhs);CHKERRQ(ierr); 220 } 221 } 222 if (!Bdense & !issym) { 223 ierr = MatDestroy(&Bd);CHKERRQ(ierr); 224 } 225 226 if (!issym) { 227 if (!Cdense) { 228 ierr = MatConvert(C, MATSEQDENSE, MAT_INITIAL_MATRIX, &Cd);CHKERRQ(ierr); 229 } else { 230 Cd = C; 231 } 232 ierr = MatMatMult(Cd, AinvBd, reuse, fill, S);CHKERRQ(ierr); 233 if (!Cdense) { 234 ierr = MatDestroy(&Cd);CHKERRQ(ierr); 235 } 236 } else { 237 ierr = MatTransposeMatMult(Bd, AinvBd, reuse, fill, S);CHKERRQ(ierr); 238 if (!Bdense) { 239 ierr = MatDestroy(&Bd);CHKERRQ(ierr); 240 } 241 } 242 ierr = MatDestroy(&AinvBd);CHKERRQ(ierr); 243 } 244 245 if (D) { 246 Mat Dd; 247 PetscBool Ddense; 248 249 ierr = PetscObjectTypeCompare((PetscObject)D,MATSEQDENSE,&Ddense);CHKERRQ(ierr); 250 if (!Ddense) { 251 ierr = MatConvert(D, MATSEQDENSE, MAT_INITIAL_MATRIX, &Dd);CHKERRQ(ierr); 252 } else { 253 Dd = D; 254 } 255 if (n_I) { 256 ierr = MatAYPX(*S,-1.0,Dd,SAME_NONZERO_PATTERN);CHKERRQ(ierr); 257 } else { 258 if (reuse == MAT_INITIAL_MATRIX) { 259 ierr = MatDuplicate(Dd,MAT_COPY_VALUES,S);CHKERRQ(ierr); 260 } else { 261 ierr = MatCopy(Dd,*S,SAME_NONZERO_PATTERN);CHKERRQ(ierr); 262 } 263 } 264 if (!Ddense) { 265 ierr = MatDestroy(&Dd);CHKERRQ(ierr); 266 } 267 } else { 268 ierr = MatScale(*S,-1.0);CHKERRQ(ierr); 269 } 270 PetscFunctionReturn(0); 271 } 272 273 #undef __FUNCT__ 274 #define __FUNCT__ "PCBDDCSubSchursSetUp" 275 PetscErrorCode PCBDDCSubSchursSetUp(PCBDDCSubSchurs sub_schurs, Mat Ain, Mat Sin, PetscInt xadj[], PetscInt adjncy[], PetscInt nlayers, PetscBool faster_deluxe, PetscBool compute_Stilda, PetscBool reuse_solvers,PetscBool use_edges, PetscBool use_faces) 276 { 277 Mat F,A_II,A_IB,A_BI,A_BB,AE_II; 278 Mat S_all; 279 Mat global_schur_subsets,work_mat; 280 Mat S_Ej_tilda_all,S_Ej_inv_all; 281 ISLocalToGlobalMapping l2gmap_subsets; 282 IS is_I,is_I_layer,temp_is; 283 PetscInt *nnz,*all_local_idx_G,*all_local_idx_N; 284 PetscInt *auxnum1,*auxnum2,*all_local_idx_G_rep; 285 PetscInt i,subset_size,max_subset_size; 286 PetscInt extra,local_size,global_size; 287 PetscBLASInt B_N,B_ierr,B_lwork,*pivots; 288 PetscScalar *Bwork; 289 PetscSubcomm subcomm; 290 PetscMPIInt color,rank; 291 MPI_Comm comm_n; 292 PetscErrorCode ierr; 293 294 PetscFunctionBegin; 295 /* update info in sub_schurs */ 296 ierr = MatDestroy(&sub_schurs->A);CHKERRQ(ierr); 297 ierr = MatDestroy(&sub_schurs->S);CHKERRQ(ierr); 298 if (Ain) { 299 PetscBool isseqaij; 300 301 ierr = PetscObjectTypeCompare((PetscObject)Ain,MATSEQAIJ,&isseqaij);CHKERRQ(ierr); 302 if (isseqaij) { 303 ierr = PetscObjectReference((PetscObject)Ain);CHKERRQ(ierr); 304 sub_schurs->A = Ain; 305 } else { /* SeqBAIJ matrices does not support symmetry checking, SeqSBAIJ does not support MatPermute */ 306 ierr = MatConvert(Ain,MATSEQAIJ,MAT_INITIAL_MATRIX,&sub_schurs->A);CHKERRQ(ierr); 307 } 308 } 309 ierr = PetscObjectReference((PetscObject)Sin);CHKERRQ(ierr); 310 sub_schurs->S = Sin; 311 if (sub_schurs->use_mumps) { 312 sub_schurs->use_mumps = (PetscBool)(!!sub_schurs->A); 313 } 314 315 /* preliminary checks */ 316 if (!sub_schurs->use_mumps && compute_Stilda) { 317 SETERRQ(PetscObjectComm((PetscObject)sub_schurs->l2gmap),PETSC_ERR_SUP,"Adaptive selection of constraints requires MUMPS"); 318 } 319 /* determine if we are dealing with hermitian positive definite problems */ 320 sub_schurs->is_hermitian = PETSC_FALSE; 321 sub_schurs->is_posdef = PETSC_FALSE; 322 if (sub_schurs->A) { 323 PetscInt lsize; 324 325 ierr = MatGetSize(sub_schurs->A,&lsize,NULL);CHKERRQ(ierr); 326 if (lsize) { 327 ierr = MatIsHermitian(sub_schurs->A,0.0,&sub_schurs->is_hermitian);CHKERRQ(ierr); 328 if (sub_schurs->is_hermitian) { 329 PetscScalar val; 330 Vec vec1,vec2; 331 332 ierr = MatCreateVecs(sub_schurs->A,&vec1,&vec2);CHKERRQ(ierr); 333 ierr = VecSetRandom(vec1,NULL); 334 ierr = VecCopy(vec1,vec2);CHKERRQ(ierr); 335 ierr = MatMult(sub_schurs->A,vec2,vec1);CHKERRQ(ierr); 336 ierr = VecDot(vec1,vec2,&val);CHKERRQ(ierr); 337 if (PetscRealPart(val) > 0. && PetscAbsReal(PetscImaginaryPart(val)) < PETSC_SMALL) sub_schurs->is_posdef = PETSC_TRUE; 338 ierr = VecDestroy(&vec1);CHKERRQ(ierr); 339 ierr = VecDestroy(&vec2);CHKERRQ(ierr); 340 } 341 } else { 342 sub_schurs->is_hermitian = PETSC_TRUE; 343 sub_schurs->is_posdef = PETSC_TRUE; 344 } 345 if (compute_Stilda && (!sub_schurs->is_hermitian || !sub_schurs->is_posdef)) { 346 SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_SUP,"General matrix pencils are not currently supported (%d,%d)",sub_schurs->is_hermitian,sub_schurs->is_posdef); 347 } 348 } 349 /* restrict work on active processes */ 350 color = 0; 351 if (!sub_schurs->n_subs) color = 1; /* this can happen if we are in a multilevel case or if the subdomain is disconnected */ 352 ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)sub_schurs->l2gmap),&rank);CHKERRQ(ierr); 353 ierr = PetscSubcommCreate(PetscObjectComm((PetscObject)sub_schurs->l2gmap),&subcomm);CHKERRQ(ierr); 354 ierr = PetscSubcommSetNumber(subcomm,2);CHKERRQ(ierr); 355 ierr = PetscSubcommSetTypeGeneral(subcomm,color,rank);CHKERRQ(ierr); 356 ierr = PetscCommDuplicate(PetscSubcommChild(subcomm),&comm_n,NULL);CHKERRQ(ierr); 357 ierr = PetscSubcommDestroy(&subcomm);CHKERRQ(ierr); 358 if (!sub_schurs->n_subs) { 359 ierr = PetscCommDestroy(&comm_n);CHKERRQ(ierr); 360 PetscFunctionReturn(0); 361 } 362 363 /* get Schur complement matrices */ 364 if (!sub_schurs->use_mumps) { 365 Mat tA_IB,tA_BI,tA_BB; 366 PetscBool isseqaij; 367 ierr = MatSchurComplementGetSubMatrices(sub_schurs->S,&A_II,NULL,&tA_IB,&tA_BI,&tA_BB);CHKERRQ(ierr); 368 ierr = PetscObjectTypeCompare((PetscObject)tA_BB,MATSEQAIJ,&isseqaij);CHKERRQ(ierr); 369 if (!isseqaij) { 370 ierr = MatConvert(tA_BB,MATSEQAIJ,MAT_INITIAL_MATRIX,&A_BB);CHKERRQ(ierr); 371 ierr = MatConvert(tA_IB,MATSEQAIJ,MAT_INITIAL_MATRIX,&A_IB);CHKERRQ(ierr); 372 ierr = MatConvert(tA_BI,MATSEQAIJ,MAT_INITIAL_MATRIX,&A_BI);CHKERRQ(ierr); 373 } else { 374 ierr = PetscObjectReference((PetscObject)tA_BB);CHKERRQ(ierr); 375 A_BB = tA_BB; 376 ierr = PetscObjectReference((PetscObject)tA_IB);CHKERRQ(ierr); 377 A_IB = tA_IB; 378 ierr = PetscObjectReference((PetscObject)tA_BI);CHKERRQ(ierr); 379 A_BI = tA_BI; 380 } 381 } else { 382 A_II = NULL; 383 A_IB = NULL; 384 A_BI = NULL; 385 A_BB = NULL; 386 } 387 S_all = NULL; 388 S_Ej_tilda_all = NULL; 389 S_Ej_inv_all = NULL; 390 391 /* determine interior problems */ 392 ierr = ISGetLocalSize(sub_schurs->is_I,&i);CHKERRQ(ierr); 393 if (nlayers >= 0 && i) { /* Interior problems can be different from the original one */ 394 PetscBT touched; 395 const PetscInt* idx_B; 396 PetscInt n_I,n_B,n_local_dofs,n_prev_added,j,layer,*local_numbering; 397 398 if (xadj == NULL || adjncy == NULL) { 399 SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Cannot request layering without adjacency"); 400 } 401 /* get sizes */ 402 ierr = ISGetLocalSize(sub_schurs->is_I,&n_I);CHKERRQ(ierr); 403 ierr = ISGetLocalSize(sub_schurs->is_B,&n_B);CHKERRQ(ierr); 404 405 ierr = PetscMalloc1(n_I+n_B,&local_numbering);CHKERRQ(ierr); 406 ierr = PetscBTCreate(n_I+n_B,&touched);CHKERRQ(ierr); 407 ierr = PetscBTMemzero(n_I+n_B,touched);CHKERRQ(ierr); 408 409 /* all boundary dofs must be skipped when adding layers */ 410 ierr = ISGetIndices(sub_schurs->is_B,&idx_B);CHKERRQ(ierr); 411 for (j=0;j<n_B;j++) { 412 ierr = PetscBTSet(touched,idx_B[j]);CHKERRQ(ierr); 413 } 414 ierr = PetscMemcpy(local_numbering,idx_B,n_B*sizeof(PetscInt));CHKERRQ(ierr); 415 ierr = ISRestoreIndices(sub_schurs->is_B,&idx_B);CHKERRQ(ierr); 416 417 /* add prescribed number of layers of dofs */ 418 n_local_dofs = n_B; 419 n_prev_added = n_B; 420 for (layer=0;layer<nlayers;layer++) { 421 PetscInt n_added; 422 if (n_local_dofs == n_I+n_B) break; 423 if (n_local_dofs > n_I+n_B) { 424 SETERRQ3(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error querying layer %d. Out of bound access (%d > %d)",layer,n_local_dofs,n_I+n_B); 425 } 426 ierr = PCBDDCAdjGetNextLayer_Private(local_numbering+n_local_dofs,n_prev_added,touched,xadj,adjncy,&n_added);CHKERRQ(ierr); 427 n_prev_added = n_added; 428 n_local_dofs += n_added; 429 if (!n_added) break; 430 } 431 ierr = PetscBTDestroy(&touched);CHKERRQ(ierr); 432 433 /* IS for I layer dofs in original numbering */ 434 ierr = ISCreateGeneral(PetscObjectComm((PetscObject)sub_schurs->is_I),n_local_dofs-n_B,local_numbering+n_B,PETSC_COPY_VALUES,&is_I_layer);CHKERRQ(ierr); 435 ierr = PetscFree(local_numbering);CHKERRQ(ierr); 436 ierr = ISSort(is_I_layer);CHKERRQ(ierr); 437 /* IS for I layer dofs in I numbering */ 438 if (!sub_schurs->use_mumps) { 439 ISLocalToGlobalMapping ItoNmap; 440 ierr = ISLocalToGlobalMappingCreateIS(sub_schurs->is_I,&ItoNmap);CHKERRQ(ierr); 441 ierr = ISGlobalToLocalMappingApplyIS(ItoNmap,IS_GTOLM_DROP,is_I_layer,&is_I);CHKERRQ(ierr); 442 ierr = ISLocalToGlobalMappingDestroy(&ItoNmap);CHKERRQ(ierr); 443 444 /* II block */ 445 ierr = MatGetSubMatrix(A_II,is_I,is_I,MAT_INITIAL_MATRIX,&AE_II);CHKERRQ(ierr); 446 } 447 } else { 448 PetscInt n_I; 449 450 /* IS for I dofs in original numbering */ 451 ierr = PetscObjectReference((PetscObject)sub_schurs->is_I);CHKERRQ(ierr); 452 is_I_layer = sub_schurs->is_I; 453 454 /* IS for I dofs in I numbering (strided 1) */ 455 if (!sub_schurs->use_mumps) { 456 ierr = ISGetSize(sub_schurs->is_I,&n_I);CHKERRQ(ierr); 457 ierr = ISCreateStride(PetscObjectComm((PetscObject)sub_schurs->is_I),n_I,0,1,&is_I);CHKERRQ(ierr); 458 459 /* II block is the same */ 460 ierr = PetscObjectReference((PetscObject)A_II);CHKERRQ(ierr); 461 AE_II = A_II; 462 } 463 } 464 465 /* Get info on subset sizes and sum of all subsets sizes */ 466 max_subset_size = 0; 467 local_size = 0; 468 for (i=0;i<sub_schurs->n_subs;i++) { 469 ierr = ISGetLocalSize(sub_schurs->is_subs[i],&subset_size);CHKERRQ(ierr); 470 max_subset_size = PetscMax(subset_size,max_subset_size); 471 local_size += subset_size; 472 } 473 474 /* Work arrays for local indices */ 475 extra = 0; 476 if (sub_schurs->use_mumps) { 477 ierr = ISGetLocalSize(is_I_layer,&extra);CHKERRQ(ierr); 478 } 479 ierr = PetscMalloc1(local_size+extra,&all_local_idx_N);CHKERRQ(ierr); 480 if (extra) { 481 const PetscInt *idxs; 482 ierr = ISGetIndices(is_I_layer,&idxs);CHKERRQ(ierr); 483 ierr = PetscMemcpy(all_local_idx_N,idxs,extra*sizeof(PetscInt));CHKERRQ(ierr); 484 ierr = ISRestoreIndices(is_I_layer,&idxs);CHKERRQ(ierr); 485 } 486 ierr = PetscMalloc1(local_size,&nnz);CHKERRQ(ierr); 487 ierr = PetscMalloc2(sub_schurs->n_subs,&auxnum1,sub_schurs->n_subs,&auxnum2);CHKERRQ(ierr); 488 489 /* Get local indices in local numbering */ 490 local_size = 0; 491 for (i=0;i<sub_schurs->n_subs;i++) { 492 PetscInt j; 493 const PetscInt *idxs; 494 495 ierr = ISGetLocalSize(sub_schurs->is_subs[i],&subset_size);CHKERRQ(ierr); 496 ierr = ISGetIndices(sub_schurs->is_subs[i],&idxs);CHKERRQ(ierr); 497 /* start (smallest in global ordering) and multiplicity */ 498 auxnum1[i] = idxs[0]; 499 auxnum2[i] = subset_size; 500 /* subset indices in local numbering */ 501 ierr = PetscMemcpy(all_local_idx_N+local_size+extra,idxs,subset_size*sizeof(PetscInt));CHKERRQ(ierr); 502 ierr = ISRestoreIndices(sub_schurs->is_subs[i],&idxs);CHKERRQ(ierr); 503 for (j=0;j<subset_size;j++) nnz[local_size+j] = subset_size; 504 local_size += subset_size; 505 } 506 507 /* allocate extra workspace needed only for GETRI */ 508 Bwork = NULL; 509 pivots = NULL; 510 if (sub_schurs->n_subs && !sub_schurs->is_hermitian) { 511 PetscScalar lwork; 512 513 B_lwork = -1; 514 ierr = PetscBLASIntCast(local_size,&B_N);CHKERRQ(ierr); 515 ierr = PetscFPTrapPush(PETSC_FP_TRAP_OFF);CHKERRQ(ierr); 516 PetscStackCallBLAS("LAPACKgetri",LAPACKgetri_(&B_N,Bwork,&B_N,pivots,&lwork,&B_lwork,&B_ierr)); 517 ierr = PetscFPTrapPop();CHKERRQ(ierr); 518 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in query to GETRI Lapack routine %d",(int)B_ierr); 519 ierr = PetscBLASIntCast((PetscInt)PetscRealPart(lwork),&B_lwork);CHKERRQ(ierr); 520 ierr = PetscMalloc2(B_lwork,&Bwork,B_N,&pivots);CHKERRQ(ierr); 521 } 522 523 /* prepare parallel matrices for summing up properly schurs on subsets */ 524 ierr = PCBDDCSubsetNumbering(comm_n,sub_schurs->l2gmap,sub_schurs->n_subs,auxnum1,auxnum2,&global_size,&all_local_idx_G_rep);CHKERRQ(ierr); 525 ierr = PetscMalloc1(local_size,&all_local_idx_G);CHKERRQ(ierr); 526 local_size = 0; 527 for (i=0;i<sub_schurs->n_subs;i++) { 528 PetscInt j; 529 for (j=0;j<auxnum2[i];j++) all_local_idx_G[local_size++] = all_local_idx_G_rep[i] + j; 530 } 531 ierr = PetscFree(all_local_idx_G_rep);CHKERRQ(ierr); 532 ierr = PetscFree2(auxnum1,auxnum2);CHKERRQ(ierr); 533 ierr = ISLocalToGlobalMappingCreate(comm_n,1,local_size,all_local_idx_G,PETSC_COPY_VALUES,&l2gmap_subsets);CHKERRQ(ierr); 534 ierr = MatCreateIS(comm_n,1,PETSC_DECIDE,PETSC_DECIDE,global_size,global_size,l2gmap_subsets,&work_mat);CHKERRQ(ierr); 535 ierr = ISLocalToGlobalMappingDestroy(&l2gmap_subsets);CHKERRQ(ierr); 536 ierr = MatCreate(PetscObjectComm((PetscObject)work_mat),&global_schur_subsets);CHKERRQ(ierr); 537 ierr = MatSetSizes(global_schur_subsets,PETSC_DECIDE,PETSC_DECIDE,global_size,global_size);CHKERRQ(ierr); 538 ierr = MatSetType(global_schur_subsets,MATMPIAIJ);CHKERRQ(ierr); 539 540 /* subset indices in local boundary numbering */ 541 if (!sub_schurs->is_Ej_all) { 542 PetscInt *all_local_idx_B; 543 544 ierr = PetscMalloc1(local_size,&all_local_idx_B);CHKERRQ(ierr); 545 ierr = ISGlobalToLocalMappingApply(sub_schurs->BtoNmap,IS_GTOLM_DROP,local_size,all_local_idx_N+extra,&subset_size,all_local_idx_B);CHKERRQ(ierr); 546 if (subset_size != local_size) { 547 SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Error in sub_schurs serial (BtoNmap)! %d != %d\n",subset_size,local_size); 548 } 549 ierr = ISCreateGeneral(PETSC_COMM_SELF,local_size,all_local_idx_B,PETSC_OWN_POINTER,&sub_schurs->is_Ej_all);CHKERRQ(ierr); 550 } 551 552 /* Local matrix of all local Schur on subsets (transposed) */ 553 if (!sub_schurs->S_Ej_all) { 554 ierr = MatCreate(PETSC_COMM_SELF,&sub_schurs->S_Ej_all);CHKERRQ(ierr); 555 ierr = MatSetSizes(sub_schurs->S_Ej_all,PETSC_DECIDE,PETSC_DECIDE,local_size,local_size);CHKERRQ(ierr); 556 ierr = MatSetType(sub_schurs->S_Ej_all,MATAIJ);CHKERRQ(ierr); 557 ierr = MatSeqAIJSetPreallocation(sub_schurs->S_Ej_all,0,nnz);CHKERRQ(ierr); 558 } else { 559 ierr = MatZeroEntries(sub_schurs->S_Ej_all);CHKERRQ(ierr); 560 } 561 562 /* Compute Schur complements explicitly */ 563 F = NULL; 564 ierr = PetscBTMemzero(sub_schurs->n_subs,sub_schurs->computed_Stilda_subs);CHKERRQ(ierr); 565 if (!sub_schurs->use_mumps) { 566 Mat S_Ej_expl; 567 PetscScalar *work; 568 PetscInt j,*dummy_idx; 569 PetscBool Sdense; 570 571 ierr = PetscMalloc2(max_subset_size,&dummy_idx,max_subset_size*max_subset_size,&work);CHKERRQ(ierr); 572 local_size = 0; 573 for (i=0;i<sub_schurs->n_subs;i++) { 574 IS is_subset_B; 575 Mat AE_EE,AE_IE,AE_EI,S_Ej; 576 577 /* subsets in original and boundary numbering */ 578 ierr = ISGlobalToLocalMappingApplyIS(sub_schurs->BtoNmap,IS_GTOLM_DROP,sub_schurs->is_subs[i],&is_subset_B);CHKERRQ(ierr); 579 /* EE block */ 580 ierr = MatGetSubMatrix(A_BB,is_subset_B,is_subset_B,MAT_INITIAL_MATRIX,&AE_EE);CHKERRQ(ierr); 581 /* IE block */ 582 ierr = MatGetSubMatrix(A_IB,is_I,is_subset_B,MAT_INITIAL_MATRIX,&AE_IE);CHKERRQ(ierr); 583 /* EI block */ 584 if (sub_schurs->is_hermitian) { 585 ierr = MatCreateTranspose(AE_IE,&AE_EI);CHKERRQ(ierr); 586 } else { 587 ierr = MatGetSubMatrix(A_BI,is_subset_B,is_I,MAT_INITIAL_MATRIX,&AE_EI);CHKERRQ(ierr); 588 } 589 ierr = ISDestroy(&is_subset_B);CHKERRQ(ierr); 590 ierr = MatCreateSchurComplement(AE_II,AE_II,AE_IE,AE_EI,AE_EE,&S_Ej);CHKERRQ(ierr); 591 ierr = MatDestroy(&AE_EE);CHKERRQ(ierr); 592 ierr = MatDestroy(&AE_IE);CHKERRQ(ierr); 593 ierr = MatDestroy(&AE_EI);CHKERRQ(ierr); 594 if (AE_II == A_II) { /* we can reuse the same ksp */ 595 KSP ksp; 596 ierr = MatSchurComplementGetKSP(sub_schurs->S,&ksp);CHKERRQ(ierr); 597 ierr = MatSchurComplementSetKSP(S_Ej,ksp);CHKERRQ(ierr); 598 } else { /* build new ksp object which inherits ksp and pc types from the original one */ 599 KSP origksp,schurksp; 600 PC origpc,schurpc; 601 KSPType ksp_type; 602 PetscInt n_internal; 603 PetscBool ispcnone; 604 605 ierr = MatSchurComplementGetKSP(sub_schurs->S,&origksp);CHKERRQ(ierr); 606 ierr = MatSchurComplementGetKSP(S_Ej,&schurksp);CHKERRQ(ierr); 607 ierr = KSPGetType(origksp,&ksp_type);CHKERRQ(ierr); 608 ierr = KSPSetType(schurksp,ksp_type);CHKERRQ(ierr); 609 ierr = KSPGetPC(schurksp,&schurpc);CHKERRQ(ierr); 610 ierr = KSPGetPC(origksp,&origpc);CHKERRQ(ierr); 611 ierr = PetscObjectTypeCompare((PetscObject)origpc,PCNONE,&ispcnone);CHKERRQ(ierr); 612 if (!ispcnone) { 613 PCType pc_type; 614 ierr = PCGetType(origpc,&pc_type);CHKERRQ(ierr); 615 ierr = PCSetType(schurpc,pc_type);CHKERRQ(ierr); 616 } else { 617 ierr = PCSetType(schurpc,PCLU);CHKERRQ(ierr); 618 } 619 ierr = ISGetSize(is_I,&n_internal);CHKERRQ(ierr); 620 if (n_internal) { /* UMFPACK gives error with 0 sized problems */ 621 MatSolverPackage solver=NULL; 622 ierr = PCFactorGetMatSolverPackage(origpc,(const MatSolverPackage*)&solver);CHKERRQ(ierr); 623 if (solver) { 624 ierr = PCFactorSetMatSolverPackage(schurpc,solver);CHKERRQ(ierr); 625 } 626 } 627 ierr = KSPSetUp(schurksp);CHKERRQ(ierr); 628 } 629 ierr = ISGetLocalSize(sub_schurs->is_subs[i],&subset_size);CHKERRQ(ierr); 630 ierr = MatCreateSeqDense(PETSC_COMM_SELF,subset_size,subset_size,work,&S_Ej_expl);CHKERRQ(ierr); 631 ierr = PCBDDCComputeExplicitSchur(S_Ej,sub_schurs->is_hermitian,MAT_REUSE_MATRIX,&S_Ej_expl);CHKERRQ(ierr); 632 ierr = PetscObjectTypeCompare((PetscObject)S_Ej_expl,MATSEQDENSE,&Sdense);CHKERRQ(ierr); 633 if (Sdense) { 634 for (j=0;j<subset_size;j++) { 635 dummy_idx[j]=local_size+j; 636 } 637 ierr = MatSetValues(sub_schurs->S_Ej_all,subset_size,dummy_idx,subset_size,dummy_idx,work,INSERT_VALUES);CHKERRQ(ierr); 638 } else { 639 SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"Not yet implemented for sparse matrices"); 640 } 641 ierr = MatDestroy(&S_Ej);CHKERRQ(ierr); 642 ierr = MatDestroy(&S_Ej_expl);CHKERRQ(ierr); 643 local_size += subset_size; 644 } 645 ierr = PetscFree2(dummy_idx,work);CHKERRQ(ierr); 646 /* free */ 647 ierr = ISDestroy(&is_I);CHKERRQ(ierr); 648 ierr = MatDestroy(&AE_II);CHKERRQ(ierr); 649 ierr = PetscFree(all_local_idx_N);CHKERRQ(ierr); 650 } else { 651 Mat A; 652 IS is_A_all; 653 PetscScalar *work,*S_data; 654 PetscInt *idxs_schur,n_I,n_I_all,*dummy_idx,size_schur,size_active_schur,cum,cum2; 655 PetscBool restore_S; 656 657 /* get working mat */ 658 ierr = ISGetLocalSize(is_I_layer,&n_I);CHKERRQ(ierr); 659 if (!sub_schurs->is_dir) { 660 ierr = ISCreateGeneral(PETSC_COMM_SELF,local_size+n_I,all_local_idx_N,PETSC_COPY_VALUES,&is_A_all);CHKERRQ(ierr); 661 size_schur = local_size; 662 } else { 663 IS list[2]; 664 665 ierr = ISCreateGeneral(PETSC_COMM_SELF,local_size+n_I,all_local_idx_N,PETSC_COPY_VALUES,&list[0]);CHKERRQ(ierr); 666 list[1] = sub_schurs->is_dir; 667 ierr = ISConcatenate(PETSC_COMM_SELF,2,list,&is_A_all);CHKERRQ(ierr); 668 ierr = ISDestroy(&list[0]);CHKERRQ(ierr); 669 ierr = ISGetLocalSize(sub_schurs->is_dir,&size_schur);CHKERRQ(ierr); 670 size_schur += local_size; 671 } 672 ierr = PetscFree(all_local_idx_N);CHKERRQ(ierr); 673 size_active_schur = local_size; /* size active schurs does not count any dirichlet dof on the interface */ 674 ierr = MatGetSubMatrix(sub_schurs->A,is_A_all,is_A_all,MAT_INITIAL_MATRIX,&A);CHKERRQ(ierr); 675 ierr = MatSetOptionsPrefix(A,"sub_schurs_");CHKERRQ(ierr); 676 677 if (n_I) { 678 if (sub_schurs->is_hermitian && sub_schurs->is_posdef) { 679 ierr = MatSetOption(A,MAT_SPD,PETSC_TRUE);CHKERRQ(ierr); 680 ierr = MatGetFactor(A,MATSOLVERMUMPS,MAT_FACTOR_CHOLESKY,&F);CHKERRQ(ierr); 681 } else { 682 ierr = MatSetOption(A,MAT_SYMMETRIC,sub_schurs->is_hermitian);CHKERRQ(ierr); 683 ierr = MatGetFactor(A,MATSOLVERMUMPS,MAT_FACTOR_LU,&F);CHKERRQ(ierr); 684 } 685 686 /* subsets ordered last */ 687 ierr = PetscMalloc1(size_schur,&idxs_schur);CHKERRQ(ierr); 688 for (i=0;i<size_schur;i++) { 689 idxs_schur[i] = n_I+i+1; 690 } 691 #if defined(PETSC_HAVE_MUMPS) 692 ierr = MatMumpsSetSchurIndices(F,size_schur,idxs_schur);CHKERRQ(ierr); 693 #endif 694 ierr = PetscFree(idxs_schur);CHKERRQ(ierr); 695 696 /* factorization step */ 697 if (sub_schurs->is_hermitian && sub_schurs->is_posdef) { 698 ierr = MatCholeskyFactorSymbolic(F,A,NULL,NULL);CHKERRQ(ierr); 699 #if defined(PETSC_HAVE_MUMPS) /* be sure that icntl 19 is not set by command line */ 700 ierr = MatMumpsSetIcntl(F,19,2);CHKERRQ(ierr); 701 #endif 702 ierr = MatCholeskyFactorNumeric(F,A,NULL);CHKERRQ(ierr); 703 } else { 704 ierr = MatLUFactorSymbolic(F,A,NULL,NULL,NULL);CHKERRQ(ierr); 705 #if defined(PETSC_HAVE_MUMPS) /* be sure that icntl 19 is not set by command line */ 706 ierr = MatMumpsSetIcntl(F,19,3);CHKERRQ(ierr); 707 #endif 708 ierr = MatLUFactorNumeric(F,A,NULL);CHKERRQ(ierr); 709 } 710 711 /* get explicit Schur Complement computed during numeric factorization */ 712 #if defined(PETSC_HAVE_MUMPS) 713 ierr = MatMumpsGetSchurComplement(F,&S_all);CHKERRQ(ierr); 714 #endif 715 716 /* we can reuse the solvers if we are not using the economic version */ 717 ierr = ISGetLocalSize(sub_schurs->is_I,&n_I_all);CHKERRQ(ierr); 718 reuse_solvers = (PetscBool)(reuse_solvers && (n_I == n_I_all)); 719 restore_S = PETSC_TRUE; 720 } else { /* we can't use MUMPS when size_schur == size_of_the_problem */ 721 ierr = MatConvert(A,MATSEQDENSE,MAT_INITIAL_MATRIX,&S_all);CHKERRQ(ierr); 722 reuse_solvers = PETSC_FALSE; 723 restore_S = PETSC_FALSE; 724 } 725 726 if (reuse_solvers) { 727 Mat A_II; 728 Vec vec1_B; 729 PCBDDCReuseMumps msolv_ctx; 730 731 if (sub_schurs->reuse_mumps) { 732 ierr = PCBDDCReuseMumpsReset(sub_schurs->reuse_mumps);CHKERRQ(ierr); 733 } else { 734 ierr = PetscNew(&sub_schurs->reuse_mumps);CHKERRQ(ierr); 735 } 736 msolv_ctx = sub_schurs->reuse_mumps; 737 ierr = MatSchurComplementGetSubMatrices(sub_schurs->S,&A_II,NULL,NULL,NULL,NULL);CHKERRQ(ierr); 738 ierr = MatGetSize(A_II,&msolv_ctx->n_I,NULL);CHKERRQ(ierr); 739 ierr = PetscObjectReference((PetscObject)F);CHKERRQ(ierr); 740 msolv_ctx->F = F; 741 ierr = MatCreateVecs(F,&msolv_ctx->sol,&msolv_ctx->rhs);CHKERRQ(ierr); 742 743 /* interior solver */ 744 ierr = PCCreate(PETSC_COMM_SELF,&msolv_ctx->interior_solver);CHKERRQ(ierr); 745 ierr = PCSetOperators(msolv_ctx->interior_solver,A_II,A_II);CHKERRQ(ierr); 746 ierr = PCSetType(msolv_ctx->interior_solver,PCSHELL);CHKERRQ(ierr); 747 ierr = PCShellSetContext(msolv_ctx->interior_solver,msolv_ctx);CHKERRQ(ierr); 748 ierr = PCShellSetApply(msolv_ctx->interior_solver,PCBDDCMumpsInteriorSolve);CHKERRQ(ierr); 749 ierr = PCShellSetApplyTranspose(msolv_ctx->interior_solver,PCBDDCMumpsInteriorSolveTranspose);CHKERRQ(ierr); 750 751 /* correction solver */ 752 ierr = PCCreate(PETSC_COMM_SELF,&msolv_ctx->correction_solver);CHKERRQ(ierr); 753 ierr = PCSetOperators(msolv_ctx->correction_solver,A,A);CHKERRQ(ierr); 754 ierr = PCSetType(msolv_ctx->correction_solver,PCSHELL);CHKERRQ(ierr); 755 ierr = PCShellSetContext(msolv_ctx->correction_solver,msolv_ctx);CHKERRQ(ierr); 756 ierr = PCShellSetApply(msolv_ctx->correction_solver,PCBDDCMumpsCorrectionSolve);CHKERRQ(ierr); 757 ierr = PCShellSetApplyTranspose(msolv_ctx->correction_solver,PCBDDCMumpsCorrectionSolveTranspose);CHKERRQ(ierr); 758 759 /* scatter and vecs for Schur complement solver */ 760 ierr = MatCreateVecs(S_all,&msolv_ctx->sol_B,&msolv_ctx->rhs_B);CHKERRQ(ierr); 761 ierr = MatCreateVecs(sub_schurs->S,&vec1_B,NULL);CHKERRQ(ierr); 762 ierr = ISGlobalToLocalMappingApplyIS(sub_schurs->BtoNmap,IS_GTOLM_DROP,is_A_all,&msolv_ctx->is_B);CHKERRQ(ierr); 763 ierr = VecScatterCreate(vec1_B,msolv_ctx->is_B,msolv_ctx->sol_B,NULL,&msolv_ctx->correction_scatter_B);CHKERRQ(ierr); 764 ierr = VecDestroy(&vec1_B);CHKERRQ(ierr); 765 ierr = PetscObjectReference((PetscObject)is_A_all);CHKERRQ(ierr); 766 msolv_ctx->is_R = is_A_all; 767 } 768 ierr = MatDestroy(&A);CHKERRQ(ierr); 769 ierr = ISDestroy(&is_A_all);CHKERRQ(ierr); 770 771 /* Work arrays */ 772 ierr = PetscMalloc2(max_subset_size,&dummy_idx,max_subset_size*max_subset_size,&work);CHKERRQ(ierr); 773 if (compute_Stilda) { 774 ierr = MatCreate(PETSC_COMM_SELF,&S_Ej_tilda_all);CHKERRQ(ierr); 775 ierr = MatSetSizes(S_Ej_tilda_all,PETSC_DECIDE,PETSC_DECIDE,size_active_schur,size_active_schur);CHKERRQ(ierr); 776 ierr = MatSetType(S_Ej_tilda_all,MATAIJ);CHKERRQ(ierr); 777 ierr = MatSeqAIJSetPreallocation(S_Ej_tilda_all,0,nnz);CHKERRQ(ierr); 778 ierr = MatCreate(PETSC_COMM_SELF,&S_Ej_inv_all);CHKERRQ(ierr); 779 ierr = MatSetSizes(S_Ej_inv_all,PETSC_DECIDE,PETSC_DECIDE,size_active_schur,size_active_schur);CHKERRQ(ierr); 780 ierr = MatSetType(S_Ej_inv_all,MATAIJ);CHKERRQ(ierr); 781 ierr = MatSeqAIJSetPreallocation(S_Ej_inv_all,0,nnz);CHKERRQ(ierr); 782 } 783 784 /* S_Ej_all */ 785 cum = cum2 = 0; 786 ierr = MatDenseGetArray(S_all,&S_data);CHKERRQ(ierr); 787 for (i=0;i<sub_schurs->n_subs;i++) { 788 PetscInt j; 789 790 /* get S_E */ 791 ierr = ISGetLocalSize(sub_schurs->is_subs[i],&subset_size);CHKERRQ(ierr); 792 if (restore_S && sub_schurs->is_hermitian) { /* When using MUMPS data I need to expand to upper triangular (column oriented) */ 793 PetscInt k; 794 for (k=0;k<subset_size;k++) { 795 for (j=k;j<subset_size;j++) { 796 work[k*subset_size+j] = S_data[cum2+k*size_schur+j]; 797 work[j*subset_size+k] = S_data[cum2+k*size_schur+j]; 798 } 799 } 800 } else { /* copy to workspace */ 801 PetscInt k; 802 for (k=0;k<subset_size;k++) { 803 for (j=0;j<subset_size;j++) { 804 work[k*subset_size+j] = S_data[cum2+k*size_schur+j]; 805 } 806 } 807 } 808 /* insert S_E values */ 809 for (j=0;j<subset_size;j++) dummy_idx[j] = cum+j; 810 ierr = MatSetValues(sub_schurs->S_Ej_all,subset_size,dummy_idx,subset_size,dummy_idx,work,INSERT_VALUES);CHKERRQ(ierr); 811 812 /* if adaptivity is requested, invert S_E block */ 813 if (compute_Stilda && ((PetscBTLookup(sub_schurs->is_edge,i) && use_edges) || (!PetscBTLookup(sub_schurs->is_edge,i) && use_faces))) { 814 ierr = PetscBLASIntCast(subset_size,&B_N);CHKERRQ(ierr); 815 ierr = PetscFPTrapPush(PETSC_FP_TRAP_OFF);CHKERRQ(ierr); 816 if (!sub_schurs->is_hermitian) { /* TODO add sytrf/i for symmetric non hermitian */ 817 PetscStackCallBLAS("LAPACKgetrf",LAPACKgetrf_(&B_N,&B_N,work,&B_N,pivots,&B_ierr)); 818 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in GETRF Lapack routine %d",(int)B_ierr); 819 PetscStackCallBLAS("LAPACKgetri",LAPACKgetri_(&B_N,work,&B_N,pivots,Bwork,&B_lwork,&B_ierr)); 820 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in GETRI Lapack routine %d",(int)B_ierr); 821 } else { 822 PetscStackCallBLAS("LAPACKpotrf",LAPACKpotrf_("L",&B_N,work,&B_N,&B_ierr)); 823 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in POTRF Lapack routine %d",(int)B_ierr); 824 PetscStackCallBLAS("LAPACKpotri",LAPACKpotri_("L",&B_N,work,&B_N,&B_ierr)); 825 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in POTRI Lapack routine %d",(int)B_ierr); 826 } 827 ierr = PetscFPTrapPop();CHKERRQ(ierr); 828 ierr = MatSetValues(S_Ej_inv_all,subset_size,dummy_idx,subset_size,dummy_idx,work,INSERT_VALUES);CHKERRQ(ierr); 829 } 830 cum += subset_size; 831 cum2 += subset_size*(size_schur + 1); 832 } 833 ierr = MatDenseRestoreArray(S_all,&S_data);CHKERRQ(ierr); 834 #if defined(PETSC_HAVE_MUMPS) 835 if (restore_S) { 836 ierr = MatMumpsRestoreSchurComplement(F,&S_all);CHKERRQ(ierr); 837 ierr = MatMumpsInvertSchurComplement(F);CHKERRQ(ierr); 838 ierr = MatMumpsGetSchurComplement(F,&S_all);CHKERRQ(ierr); 839 } else if (compute_Stilda) { /* we need to invert explicitly since we are not using MUMPS */ 840 ierr = MatDenseGetArray(S_all,&S_data);CHKERRQ(ierr); 841 ierr = PetscBLASIntCast(size_schur,&B_N);CHKERRQ(ierr); 842 ierr = PetscFPTrapPush(PETSC_FP_TRAP_OFF);CHKERRQ(ierr); 843 if (!sub_schurs->is_hermitian) { /* TODO add sytrf/i for symmetric non hermitian */ 844 PetscStackCallBLAS("LAPACKgetrf",LAPACKgetrf_(&B_N,&B_N,S_data,&B_N,pivots,&B_ierr)); 845 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in GETRF Lapack routine %d",(int)B_ierr); 846 PetscStackCallBLAS("LAPACKgetri",LAPACKgetri_(&B_N,S_data,&B_N,pivots,Bwork,&B_lwork,&B_ierr)); 847 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in GETRI Lapack routine %d",(int)B_ierr); 848 } else { 849 PetscStackCallBLAS("LAPACKpotrf",LAPACKpotrf_("L",&B_N,S_data,&B_N,&B_ierr)); 850 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in POTRF Lapack routine %d",(int)B_ierr); 851 PetscStackCallBLAS("LAPACKpotri",LAPACKpotri_("L",&B_N,S_data,&B_N,&B_ierr)); 852 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in POTRI Lapack routine %d",(int)B_ierr); 853 } 854 ierr = PetscFPTrapPop();CHKERRQ(ierr); 855 ierr = MatDenseRestoreArray(S_all,&S_data);CHKERRQ(ierr); 856 } 857 #endif 858 /* S_Ej_tilda_all */ 859 cum = cum2 = 0; 860 ierr = MatDenseGetArray(S_all,&S_data);CHKERRQ(ierr); 861 for (i=0;i<sub_schurs->n_subs;i++) { 862 ierr = ISGetLocalSize(sub_schurs->is_subs[i],&subset_size);CHKERRQ(ierr); 863 /* if adaptivity is requested, invert S_E and insert St_E^-1 blocks */ 864 if (compute_Stilda && ((PetscBTLookup(sub_schurs->is_edge,i) && use_edges) || (!PetscBTLookup(sub_schurs->is_edge,i) && use_faces))) { 865 PetscInt j; 866 /* get (St^-1)_E */ 867 if (sub_schurs->is_hermitian) { /* I need to expand to upper triangular (column oriented) */ 868 PetscInt k; 869 for (k=0;k<subset_size;k++) { 870 for (j=k;j<subset_size;j++) { 871 work[k*subset_size+j] = S_data[cum2+k*size_schur+j]; 872 work[j*subset_size+k] = S_data[cum2+k*size_schur+j]; 873 } 874 } 875 } else { /* copy to workspace */ 876 PetscInt k; 877 for (k=0;k<subset_size;k++) { 878 for (j=0;j<subset_size;j++) { 879 work[k*subset_size+j] = S_data[cum2+k*size_schur+j]; 880 } 881 } 882 } 883 for (j=0;j<subset_size;j++) dummy_idx[j] = cum+j; 884 ierr = MatSetValues(S_Ej_tilda_all,subset_size,dummy_idx,subset_size,dummy_idx,work,INSERT_VALUES);CHKERRQ(ierr); 885 ierr = PetscBTSet(sub_schurs->computed_Stilda_subs,i);CHKERRQ(ierr); 886 } 887 cum += subset_size; 888 cum2 += subset_size*(size_schur + 1); 889 } 890 ierr = MatDenseRestoreArray(S_all,&S_data);CHKERRQ(ierr); 891 ierr = PetscFree2(dummy_idx,work);CHKERRQ(ierr); 892 #if defined(PETSC_HAVE_MUMPS) 893 if (restore_S) { 894 ierr = MatMumpsRestoreSchurComplement(F,&S_all);CHKERRQ(ierr); 895 } 896 #endif 897 } 898 ierr = MatDestroy(&F);CHKERRQ(ierr); 899 ierr = ISDestroy(&is_I_layer);CHKERRQ(ierr); 900 ierr = PetscFree(nnz);CHKERRQ(ierr); 901 ierr = MatDestroy(&S_all);CHKERRQ(ierr); 902 ierr = MatDestroy(&A_BB);CHKERRQ(ierr); 903 ierr = MatDestroy(&A_IB);CHKERRQ(ierr); 904 ierr = MatDestroy(&A_BI);CHKERRQ(ierr); 905 ierr = MatAssemblyBegin(sub_schurs->S_Ej_all,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 906 ierr = MatAssemblyEnd(sub_schurs->S_Ej_all,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 907 if (compute_Stilda) { 908 ierr = MatAssemblyBegin(S_Ej_tilda_all,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 909 ierr = MatAssemblyEnd(S_Ej_tilda_all,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 910 ierr = MatAssemblyBegin(S_Ej_inv_all,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 911 ierr = MatAssemblyEnd(S_Ej_inv_all,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 912 } 913 914 /* Global matrix of all assembled Schur on subsets */ 915 ierr = MatISSetLocalMat(work_mat,sub_schurs->S_Ej_all);CHKERRQ(ierr); 916 ierr = MatISSetMPIXAIJPreallocation_Private(work_mat,global_schur_subsets,PETSC_TRUE);CHKERRQ(ierr); 917 ierr = MatISGetMPIXAIJ(work_mat,MAT_REUSE_MATRIX,&global_schur_subsets);CHKERRQ(ierr); 918 919 /* Get local part of (\sum_j S_Ej) */ 920 ierr = ISCreateGeneral(comm_n,local_size,all_local_idx_G,PETSC_OWN_POINTER,&temp_is);CHKERRQ(ierr); 921 ierr = MatDestroy(&sub_schurs->sum_S_Ej_all);CHKERRQ(ierr); 922 ierr = MatGetSubMatrixUnsorted(global_schur_subsets,temp_is,temp_is,&sub_schurs->sum_S_Ej_all);CHKERRQ(ierr); 923 924 /* Compute explicitly (\sum_j S_Ej)^-1 (faster scaling during PCApply, needs extra work when doing setup) */ 925 if (faster_deluxe) { 926 Mat tmpmat; 927 PetscScalar *array; 928 PetscInt cum; 929 930 ierr = MatSeqAIJGetArray(sub_schurs->sum_S_Ej_all,&array);CHKERRQ(ierr); 931 cum = 0; 932 for (i=0;i<sub_schurs->n_subs;i++) { 933 ierr = ISGetLocalSize(sub_schurs->is_subs[i],&subset_size);CHKERRQ(ierr); 934 ierr = PetscBLASIntCast(subset_size,&B_N);CHKERRQ(ierr); 935 ierr = PetscFPTrapPush(PETSC_FP_TRAP_OFF);CHKERRQ(ierr); 936 if (!sub_schurs->is_hermitian) { 937 PetscStackCallBLAS("LAPACKgetrf",LAPACKgetrf_(&B_N,&B_N,array+cum,&B_N,pivots,&B_ierr)); 938 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in GETRF Lapack routine %d",(int)B_ierr); 939 PetscStackCallBLAS("LAPACKgetri",LAPACKgetri_(&B_N,array+cum,&B_N,pivots,Bwork,&B_lwork,&B_ierr)); 940 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in GETRI Lapack routine %d",(int)B_ierr); 941 } else { 942 PetscInt j,k; 943 944 PetscStackCallBLAS("LAPACKpotrf",LAPACKpotrf_("L",&B_N,array+cum,&B_N,&B_ierr)); 945 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in POTRF Lapack routine %d",(int)B_ierr); 946 PetscStackCallBLAS("LAPACKpotri",LAPACKpotri_("L",&B_N,array+cum,&B_N,&B_ierr)); 947 if (B_ierr) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Error in POTRI Lapack routine %d",(int)B_ierr); 948 for (j=0;j<B_N;j++) { 949 for (k=j+1;k<B_N;k++) { 950 array[k*B_N+j+cum] = array[j*B_N+k+cum]; 951 } 952 } 953 } 954 ierr = PetscFPTrapPop();CHKERRQ(ierr); 955 cum += subset_size*subset_size; 956 } 957 ierr = MatSeqAIJRestoreArray(sub_schurs->sum_S_Ej_all,&array);CHKERRQ(ierr); 958 ierr = MatMatMult(sub_schurs->S_Ej_all,sub_schurs->sum_S_Ej_all,MAT_INITIAL_MATRIX,1.0,&tmpmat);CHKERRQ(ierr); 959 ierr = MatDestroy(&sub_schurs->S_Ej_all);CHKERRQ(ierr); 960 ierr = MatDestroy(&sub_schurs->sum_S_Ej_all);CHKERRQ(ierr); 961 sub_schurs->S_Ej_all = tmpmat; 962 } 963 964 /* Get local part of (\sum_j S^-1_Ej) (\sum_j St^-1_Ej) */ 965 if (compute_Stilda) { 966 ierr = MatISSetLocalMat(work_mat,S_Ej_tilda_all);CHKERRQ(ierr); 967 ierr = MatISGetMPIXAIJ(work_mat,MAT_REUSE_MATRIX,&global_schur_subsets);CHKERRQ(ierr); 968 ierr = MatDestroy(&sub_schurs->sum_S_Ej_tilda_all);CHKERRQ(ierr); 969 ierr = MatGetSubMatrixUnsorted(global_schur_subsets,temp_is,temp_is,&sub_schurs->sum_S_Ej_tilda_all);CHKERRQ(ierr); 970 ierr = MatISSetLocalMat(work_mat,S_Ej_inv_all);CHKERRQ(ierr); 971 ierr = MatISGetMPIXAIJ(work_mat,MAT_REUSE_MATRIX,&global_schur_subsets);CHKERRQ(ierr); 972 ierr = MatDestroy(&sub_schurs->sum_S_Ej_inv_all);CHKERRQ(ierr); 973 ierr = MatGetSubMatrixUnsorted(global_schur_subsets,temp_is,temp_is,&sub_schurs->sum_S_Ej_inv_all);CHKERRQ(ierr); 974 } 975 976 /* free workspace */ 977 ierr = PetscFree2(Bwork,pivots);CHKERRQ(ierr); 978 ierr = MatDestroy(&global_schur_subsets);CHKERRQ(ierr); 979 ierr = MatDestroy(&S_Ej_tilda_all);CHKERRQ(ierr); 980 ierr = MatDestroy(&S_Ej_inv_all);CHKERRQ(ierr); 981 ierr = MatDestroy(&work_mat);CHKERRQ(ierr); 982 ierr = ISDestroy(&temp_is);CHKERRQ(ierr); 983 ierr = PetscCommDestroy(&comm_n);CHKERRQ(ierr); 984 PetscFunctionReturn(0); 985 } 986 987 #undef __FUNCT__ 988 #define __FUNCT__ "PCBDDCSubSchursInit" 989 PetscErrorCode PCBDDCSubSchursInit(PCBDDCSubSchurs sub_schurs, IS is_I, IS is_B, PCBDDCGraph graph, ISLocalToGlobalMapping BtoNmap) 990 { 991 IS *faces,*edges,*all_cc,vertices; 992 PetscInt i,n_faces,n_edges,n_all_cc; 993 PetscBool is_sorted; 994 PetscErrorCode ierr; 995 996 PetscFunctionBegin; 997 ierr = ISSorted(is_I,&is_sorted);CHKERRQ(ierr); 998 if (!is_sorted) { 999 SETERRQ(PetscObjectComm((PetscObject)is_I),PETSC_ERR_PLIB,"IS for I dofs should be shorted"); 1000 } 1001 ierr = ISSorted(is_B,&is_sorted);CHKERRQ(ierr); 1002 if (!is_sorted) { 1003 SETERRQ(PetscObjectComm((PetscObject)is_B),PETSC_ERR_PLIB,"IS for B dofs should be shorted"); 1004 } 1005 1006 /* reset any previous data */ 1007 ierr = PCBDDCSubSchursReset(sub_schurs);CHKERRQ(ierr); 1008 1009 /* get index sets for faces and edges (already sorted by global ordering) */ 1010 ierr = PCBDDCGraphGetCandidatesIS(graph,&n_faces,&faces,&n_edges,&edges,&vertices);CHKERRQ(ierr); 1011 n_all_cc = n_faces+n_edges; 1012 ierr = PetscBTCreate(n_all_cc,&sub_schurs->is_edge);CHKERRQ(ierr); 1013 ierr = PetscBTCreate(n_all_cc,&sub_schurs->computed_Stilda_subs);CHKERRQ(ierr); 1014 ierr = PetscMalloc1(n_all_cc,&all_cc);CHKERRQ(ierr); 1015 for (i=0;i<n_faces;i++) { 1016 all_cc[i] = faces[i]; 1017 } 1018 for (i=0;i<n_edges;i++) { 1019 all_cc[n_faces+i] = edges[i]; 1020 ierr = PetscBTSet(sub_schurs->is_edge,n_faces+i);CHKERRQ(ierr); 1021 } 1022 ierr = PetscFree(faces);CHKERRQ(ierr); 1023 ierr = PetscFree(edges);CHKERRQ(ierr); 1024 sub_schurs->is_dir = NULL; 1025 ierr = PCBDDCGraphGetDirichletDofsB(graph,&sub_schurs->is_dir);CHKERRQ(ierr); 1026 1027 /* Determine if MUMPS can be used */ 1028 sub_schurs->use_mumps = PETSC_FALSE; 1029 #if defined(PETSC_HAVE_MUMPS) 1030 sub_schurs->use_mumps = PETSC_TRUE; 1031 #endif 1032 1033 ierr = PetscObjectReference((PetscObject)is_I);CHKERRQ(ierr); 1034 sub_schurs->is_I = is_I; 1035 ierr = PetscObjectReference((PetscObject)is_B);CHKERRQ(ierr); 1036 sub_schurs->is_B = is_B; 1037 ierr = PetscObjectReference((PetscObject)graph->l2gmap);CHKERRQ(ierr); 1038 sub_schurs->l2gmap = graph->l2gmap; 1039 ierr = PetscObjectReference((PetscObject)BtoNmap);CHKERRQ(ierr); 1040 sub_schurs->BtoNmap = BtoNmap; 1041 sub_schurs->n_subs = n_all_cc; 1042 sub_schurs->is_subs = all_cc; 1043 if (!sub_schurs->use_mumps) { /* sort by local ordering mumps is not present */ 1044 for (i=0;i<sub_schurs->n_subs;i++) { 1045 ierr = ISSort(sub_schurs->is_subs[i]);CHKERRQ(ierr); 1046 } 1047 } 1048 sub_schurs->is_vertices = vertices; 1049 sub_schurs->S_Ej_all = NULL; 1050 sub_schurs->sum_S_Ej_all = NULL; 1051 sub_schurs->sum_S_Ej_inv_all = NULL; 1052 sub_schurs->sum_S_Ej_tilda_all = NULL; 1053 sub_schurs->is_Ej_all = NULL; 1054 PetscFunctionReturn(0); 1055 } 1056 1057 #undef __FUNCT__ 1058 #define __FUNCT__ "PCBDDCSubSchursCreate" 1059 PetscErrorCode PCBDDCSubSchursCreate(PCBDDCSubSchurs *sub_schurs) 1060 { 1061 PCBDDCSubSchurs schurs_ctx; 1062 PetscErrorCode ierr; 1063 1064 PetscFunctionBegin; 1065 ierr = PetscNew(&schurs_ctx);CHKERRQ(ierr); 1066 schurs_ctx->n_subs = 0; 1067 *sub_schurs = schurs_ctx; 1068 PetscFunctionReturn(0); 1069 } 1070 1071 #undef __FUNCT__ 1072 #define __FUNCT__ "PCBDDCSubSchursDestroy" 1073 PetscErrorCode PCBDDCSubSchursDestroy(PCBDDCSubSchurs *sub_schurs) 1074 { 1075 PetscErrorCode ierr; 1076 1077 PetscFunctionBegin; 1078 ierr = PCBDDCSubSchursReset(*sub_schurs);CHKERRQ(ierr); 1079 ierr = PetscFree(*sub_schurs);CHKERRQ(ierr); 1080 PetscFunctionReturn(0); 1081 } 1082 1083 #undef __FUNCT__ 1084 #define __FUNCT__ "PCBDDCSubSchursReset" 1085 PetscErrorCode PCBDDCSubSchursReset(PCBDDCSubSchurs sub_schurs) 1086 { 1087 PetscInt i; 1088 PetscErrorCode ierr; 1089 1090 PetscFunctionBegin; 1091 ierr = MatDestroy(&sub_schurs->A);CHKERRQ(ierr); 1092 ierr = MatDestroy(&sub_schurs->S);CHKERRQ(ierr); 1093 ierr = ISDestroy(&sub_schurs->is_I);CHKERRQ(ierr); 1094 ierr = ISDestroy(&sub_schurs->is_B);CHKERRQ(ierr); 1095 ierr = ISLocalToGlobalMappingDestroy(&sub_schurs->l2gmap);CHKERRQ(ierr); 1096 ierr = ISLocalToGlobalMappingDestroy(&sub_schurs->BtoNmap);CHKERRQ(ierr); 1097 ierr = MatDestroy(&sub_schurs->S_Ej_all);CHKERRQ(ierr); 1098 ierr = MatDestroy(&sub_schurs->sum_S_Ej_all);CHKERRQ(ierr); 1099 ierr = MatDestroy(&sub_schurs->sum_S_Ej_inv_all);CHKERRQ(ierr); 1100 ierr = MatDestroy(&sub_schurs->sum_S_Ej_tilda_all);CHKERRQ(ierr); 1101 ierr = ISDestroy(&sub_schurs->is_Ej_all);CHKERRQ(ierr); 1102 ierr = ISDestroy(&sub_schurs->is_vertices);CHKERRQ(ierr); 1103 ierr = ISDestroy(&sub_schurs->is_dir);CHKERRQ(ierr); 1104 ierr = PetscBTDestroy(&sub_schurs->is_edge);CHKERRQ(ierr); 1105 ierr = PetscBTDestroy(&sub_schurs->computed_Stilda_subs);CHKERRQ(ierr); 1106 for (i=0;i<sub_schurs->n_subs;i++) { 1107 ierr = ISDestroy(&sub_schurs->is_subs[i]);CHKERRQ(ierr); 1108 } 1109 if (sub_schurs->n_subs) { 1110 ierr = PetscFree(sub_schurs->is_subs);CHKERRQ(ierr); 1111 } 1112 if (sub_schurs->reuse_mumps) { 1113 ierr = PCBDDCReuseMumpsReset(sub_schurs->reuse_mumps);CHKERRQ(ierr); 1114 } 1115 ierr = PetscFree(sub_schurs->reuse_mumps);CHKERRQ(ierr); 1116 sub_schurs->n_subs = 0; 1117 PetscFunctionReturn(0); 1118 } 1119 1120 #undef __FUNCT__ 1121 #define __FUNCT__ "PCBDDCAdjGetNextLayer_Private" 1122 PETSC_STATIC_INLINE PetscErrorCode PCBDDCAdjGetNextLayer_Private(PetscInt* queue_tip,PetscInt n_prev,PetscBT touched,PetscInt* xadj,PetscInt* adjncy,PetscInt* n_added) 1123 { 1124 PetscInt i,j,n; 1125 PetscErrorCode ierr; 1126 1127 PetscFunctionBegin; 1128 n = 0; 1129 for (i=-n_prev;i<0;i++) { 1130 PetscInt start_dof = queue_tip[i]; 1131 for (j=xadj[start_dof];j<xadj[start_dof+1];j++) { 1132 PetscInt dof = adjncy[j]; 1133 if (!PetscBTLookup(touched,dof)) { 1134 ierr = PetscBTSet(touched,dof);CHKERRQ(ierr); 1135 queue_tip[n] = dof; 1136 n++; 1137 } 1138 } 1139 } 1140 *n_added = n; 1141 PetscFunctionReturn(0); 1142 } 1143