1 /* TODOLIST 2 3 Solvers 4 - Add support for cholesky for coarse solver (similar to local solvers) 5 - Propagate ksp prefixes for solvers to mat objects? 6 7 User interface 8 - ** DM attached to pc? 9 10 Debugging output 11 - * Better management of verbosity levels of debugging output 12 13 Extra 14 - *** Is it possible to work with PCBDDCGraph on boundary indices only (less memory consumed)? 15 - BDDC with MG framework? 16 17 FETIDP 18 - Move FETIDP code to its own classes 19 20 MATIS related operations contained in BDDC code 21 - Provide general case for subassembling 22 23 */ 24 25 #include <../src/ksp/pc/impls/bddc/bddc.h> /*I "petscpc.h" I*/ /* includes for fortran wrappers */ 26 #include <../src/ksp/pc/impls/bddc/bddcprivate.h> 27 #include <petscblaslapack.h> 28 29 /* -------------------------------------------------------------------------- */ 30 #undef __FUNCT__ 31 #define __FUNCT__ "PCSetFromOptions_BDDC" 32 PetscErrorCode PCSetFromOptions_BDDC(PetscOptions *PetscOptionsObject,PC pc) 33 { 34 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 35 PetscErrorCode ierr; 36 37 PetscFunctionBegin; 38 ierr = PetscOptionsHead(PetscOptionsObject,"BDDC options");CHKERRQ(ierr); 39 /* Verbose debugging */ 40 ierr = PetscOptionsInt("-pc_bddc_check_level","Verbose output for PCBDDC (intended for debug)","none",pcbddc->dbg_flag,&pcbddc->dbg_flag,NULL);CHKERRQ(ierr); 41 /* Primal space cumstomization */ 42 ierr = PetscOptionsBool("-pc_bddc_use_local_mat_graph","Use or not adjacency graph of local mat for interface analysis","none",pcbddc->use_local_adj,&pcbddc->use_local_adj,NULL);CHKERRQ(ierr); 43 ierr = PetscOptionsBool("-pc_bddc_use_vertices","Use or not corner dofs in coarse space","none",pcbddc->use_vertices,&pcbddc->use_vertices,NULL);CHKERRQ(ierr); 44 ierr = PetscOptionsBool("-pc_bddc_use_edges","Use or not edge constraints in coarse space","none",pcbddc->use_edges,&pcbddc->use_edges,NULL);CHKERRQ(ierr); 45 ierr = PetscOptionsBool("-pc_bddc_use_faces","Use or not face constraints in coarse space","none",pcbddc->use_faces,&pcbddc->use_faces,NULL);CHKERRQ(ierr); 46 ierr = PetscOptionsBool("-pc_bddc_use_true_nnsp","Use near null space attached to the matrix without modifications","none",pcbddc->use_nnsp_true,&pcbddc->use_nnsp_true,NULL);CHKERRQ(ierr); 47 ierr = PetscOptionsBool("-pc_bddc_use_qr_single","Use QR factorization for single constraints on cc (QR is used when multiple constraints are present)","none",pcbddc->use_qr_single,&pcbddc->use_qr_single,NULL);CHKERRQ(ierr); 48 /* Change of basis */ 49 ierr = PetscOptionsBool("-pc_bddc_use_change_of_basis","Use or not internal change of basis on local edge nodes","none",pcbddc->use_change_of_basis,&pcbddc->use_change_of_basis,NULL);CHKERRQ(ierr); 50 ierr = PetscOptionsBool("-pc_bddc_use_change_on_faces","Use or not internal change of basis on local face nodes","none",pcbddc->use_change_on_faces,&pcbddc->use_change_on_faces,NULL);CHKERRQ(ierr); 51 if (!pcbddc->use_change_of_basis) { 52 pcbddc->use_change_on_faces = PETSC_FALSE; 53 } 54 /* Switch between M_2 (default) and M_3 preconditioners (as defined by C. Dohrmann in the ref. article) */ 55 ierr = PetscOptionsBool("-pc_bddc_switch_static","Switch on static condensation ops around the interface preconditioner","none",pcbddc->switch_static,&pcbddc->switch_static,NULL);CHKERRQ(ierr); 56 ierr = PetscOptionsInt("-pc_bddc_coarse_redistribute","Number of procs where to redistribute coarse problem","none",pcbddc->redistribute_coarse,&pcbddc->redistribute_coarse,NULL);CHKERRQ(ierr); 57 ierr = PetscOptionsInt("-pc_bddc_coarsening_ratio","Set coarsening ratio used in multilevel coarsening","none",pcbddc->coarsening_ratio,&pcbddc->coarsening_ratio,NULL);CHKERRQ(ierr); 58 ierr = PetscOptionsInt("-pc_bddc_levels","Set maximum number of levels for multilevel","none",pcbddc->max_levels,&pcbddc->max_levels,NULL);CHKERRQ(ierr); 59 ierr = PetscOptionsBool("-pc_bddc_use_coarse_estimates","Use estimated eigenvalues for coarse problem","none",pcbddc->use_coarse_estimates,&pcbddc->use_coarse_estimates,NULL);CHKERRQ(ierr); 60 ierr = PetscOptionsBool("-pc_bddc_use_deluxe_scaling","Use deluxe scaling for BDDC","none",pcbddc->use_deluxe_scaling,&pcbddc->use_deluxe_scaling,NULL);CHKERRQ(ierr); 61 ierr = PetscOptionsBool("-pc_bddc_schur_rebuild","Whether or not the interface graph for Schur principal minors has to be rebuilt (i.e. define the interface without any adjacency)","none",pcbddc->sub_schurs_rebuild,&pcbddc->sub_schurs_rebuild,NULL);CHKERRQ(ierr); 62 ierr = PetscOptionsInt("-pc_bddc_schur_layers","Number of dofs' layers for the computation of principal minors (i.e. -1 uses all dofs)","none",pcbddc->sub_schurs_layers,&pcbddc->sub_schurs_layers,NULL);CHKERRQ(ierr); 63 ierr = PetscOptionsBool("-pc_bddc_schur_use_useradj","Whether or not the CSR graph specified by the user should be used for computing successive layers (default is to use adj of local mat)","none",pcbddc->sub_schurs_use_useradj,&pcbddc->sub_schurs_use_useradj,NULL);CHKERRQ(ierr); 64 ierr = PetscOptionsBool("-pc_bddc_deluxe_faster","Faster application of deluxe scaling (requires extra work during setup)","none",pcbddc->faster_deluxe,&pcbddc->faster_deluxe,NULL);CHKERRQ(ierr); 65 ierr = PetscOptionsReal("-pc_bddc_adaptive_threshold","Threshold to be used for adaptive selection of constraints","none",pcbddc->adaptive_threshold,&pcbddc->adaptive_threshold,NULL);CHKERRQ(ierr); 66 ierr = PetscOptionsInt("-pc_bddc_adaptive_nmin","Minimum number of constraints per connected components","none",pcbddc->adaptive_nmin,&pcbddc->adaptive_nmin,NULL);CHKERRQ(ierr); 67 ierr = PetscOptionsInt("-pc_bddc_adaptive_nmax","Maximum number of constraints per connected components","none",pcbddc->adaptive_nmax,&pcbddc->adaptive_nmax,NULL);CHKERRQ(ierr); 68 ierr = PetscOptionsBool("-pc_bddc_symmetric","Symmetric computation of primal basis functions","none",pcbddc->symmetric_primal,&pcbddc->symmetric_primal,NULL);CHKERRQ(ierr); 69 ierr = PetscOptionsInt("-pc_bddc_coarse_adj","Number of processors where to map the coarse adjacency list","none",pcbddc->coarse_adj_red,&pcbddc->coarse_adj_red,NULL);CHKERRQ(ierr); 70 ierr = PetscOptionsBool("-pc_bddc_saddle_point","Apply the benign subspace trick","none",pcbddc->saddle_point,&pcbddc->saddle_point,NULL);CHKERRQ(ierr); 71 ierr = PetscOptionsTail();CHKERRQ(ierr); 72 PetscFunctionReturn(0); 73 } 74 /* -------------------------------------------------------------------------- */ 75 #undef __FUNCT__ 76 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat_BDDC" 77 static PetscErrorCode PCBDDCSetChangeOfBasisMat_BDDC(PC pc, Mat change) 78 { 79 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 80 PetscErrorCode ierr; 81 82 PetscFunctionBegin; 83 ierr = MatDestroy(&pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 84 ierr = PetscObjectReference((PetscObject)change);CHKERRQ(ierr); 85 pcbddc->user_ChangeOfBasisMatrix = change; 86 PetscFunctionReturn(0); 87 } 88 #undef __FUNCT__ 89 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat" 90 /*@ 91 PCBDDCSetChangeOfBasisMat - Set user defined change of basis for dofs 92 93 Collective on PC 94 95 Input Parameters: 96 + pc - the preconditioning context 97 - change - the change of basis matrix 98 99 Level: intermediate 100 101 Notes: 102 103 .seealso: PCBDDC 104 @*/ 105 PetscErrorCode PCBDDCSetChangeOfBasisMat(PC pc, Mat change) 106 { 107 PetscErrorCode ierr; 108 109 PetscFunctionBegin; 110 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 111 PetscValidHeaderSpecific(change,MAT_CLASSID,2); 112 PetscCheckSameComm(pc,1,change,2); 113 if (pc->mat) { 114 PetscInt rows_c,cols_c,rows,cols; 115 ierr = MatGetSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 116 ierr = MatGetSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 117 if (rows_c != rows) { 118 SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of rows for change of basis matrix! %d != %d",rows_c,rows); 119 } 120 if (cols_c != cols) { 121 SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of columns for change of basis matrix! %d != %d",cols_c,cols); 122 } 123 ierr = MatGetLocalSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 124 ierr = MatGetLocalSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 125 if (rows_c != rows) { 126 SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of local rows for change of basis matrix! %d != %d",rows_c,rows); 127 } 128 if (cols_c != cols) { 129 SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of local columns for change of basis matrix! %d != %d",cols_c,cols); 130 } 131 } 132 ierr = PetscTryMethod(pc,"PCBDDCSetChangeOfBasisMat_C",(PC,Mat),(pc,change));CHKERRQ(ierr); 133 PetscFunctionReturn(0); 134 } 135 /* -------------------------------------------------------------------------- */ 136 #undef __FUNCT__ 137 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS_BDDC" 138 static PetscErrorCode PCBDDCSetPrimalVerticesLocalIS_BDDC(PC pc, IS PrimalVertices) 139 { 140 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 141 PetscErrorCode ierr; 142 143 PetscFunctionBegin; 144 ierr = ISDestroy(&pcbddc->user_primal_vertices);CHKERRQ(ierr); 145 ierr = PetscObjectReference((PetscObject)PrimalVertices);CHKERRQ(ierr); 146 pcbddc->user_primal_vertices = PrimalVertices; 147 PetscFunctionReturn(0); 148 } 149 #undef __FUNCT__ 150 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS" 151 /*@ 152 PCBDDCSetPrimalVerticesLocalIS - Set additional user defined primal vertices in PCBDDC 153 154 Collective 155 156 Input Parameters: 157 + pc - the preconditioning context 158 - PrimalVertices - index set of primal vertices in local numbering (can be empty) 159 160 Level: intermediate 161 162 Notes: 163 164 .seealso: PCBDDC 165 @*/ 166 PetscErrorCode PCBDDCSetPrimalVerticesLocalIS(PC pc, IS PrimalVertices) 167 { 168 PetscErrorCode ierr; 169 170 PetscFunctionBegin; 171 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 172 PetscValidHeaderSpecific(PrimalVertices,IS_CLASSID,2); 173 PetscCheckSameComm(pc,1,PrimalVertices,2); 174 ierr = PetscTryMethod(pc,"PCBDDCSetPrimalVerticesLocalIS_C",(PC,IS),(pc,PrimalVertices));CHKERRQ(ierr); 175 PetscFunctionReturn(0); 176 } 177 /* -------------------------------------------------------------------------- */ 178 #undef __FUNCT__ 179 #define __FUNCT__ "PCBDDCSetCoarseningRatio_BDDC" 180 static PetscErrorCode PCBDDCSetCoarseningRatio_BDDC(PC pc,PetscInt k) 181 { 182 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 183 184 PetscFunctionBegin; 185 pcbddc->coarsening_ratio = k; 186 PetscFunctionReturn(0); 187 } 188 189 #undef __FUNCT__ 190 #define __FUNCT__ "PCBDDCSetCoarseningRatio" 191 /*@ 192 PCBDDCSetCoarseningRatio - Set coarsening ratio used in multilevel 193 194 Logically collective on PC 195 196 Input Parameters: 197 + pc - the preconditioning context 198 - k - coarsening ratio (H/h at the coarser level) 199 200 Options Database Keys: 201 . -pc_bddc_coarsening_ratio 202 203 Level: intermediate 204 205 Notes: 206 Approximatively k subdomains at the finer level will be aggregated into a single subdomain at the coarser level 207 208 .seealso: PCBDDC, PCBDDCSetLevels() 209 @*/ 210 PetscErrorCode PCBDDCSetCoarseningRatio(PC pc,PetscInt k) 211 { 212 PetscErrorCode ierr; 213 214 PetscFunctionBegin; 215 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 216 PetscValidLogicalCollectiveInt(pc,k,2); 217 ierr = PetscTryMethod(pc,"PCBDDCSetCoarseningRatio_C",(PC,PetscInt),(pc,k));CHKERRQ(ierr); 218 PetscFunctionReturn(0); 219 } 220 221 /* The following functions (PCBDDCSetUseExactDirichlet PCBDDCSetLevel) are not public */ 222 #undef __FUNCT__ 223 #define __FUNCT__ "PCBDDCSetUseExactDirichlet_BDDC" 224 static PetscErrorCode PCBDDCSetUseExactDirichlet_BDDC(PC pc,PetscBool flg) 225 { 226 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 227 228 PetscFunctionBegin; 229 pcbddc->use_exact_dirichlet_trick = flg; 230 PetscFunctionReturn(0); 231 } 232 233 #undef __FUNCT__ 234 #define __FUNCT__ "PCBDDCSetUseExactDirichlet" 235 PetscErrorCode PCBDDCSetUseExactDirichlet(PC pc,PetscBool flg) 236 { 237 PetscErrorCode ierr; 238 239 PetscFunctionBegin; 240 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 241 PetscValidLogicalCollectiveBool(pc,flg,2); 242 ierr = PetscTryMethod(pc,"PCBDDCSetUseExactDirichlet_C",(PC,PetscBool),(pc,flg));CHKERRQ(ierr); 243 PetscFunctionReturn(0); 244 } 245 246 #undef __FUNCT__ 247 #define __FUNCT__ "PCBDDCSetLevel_BDDC" 248 static PetscErrorCode PCBDDCSetLevel_BDDC(PC pc,PetscInt level) 249 { 250 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 251 252 PetscFunctionBegin; 253 pcbddc->current_level = level; 254 PetscFunctionReturn(0); 255 } 256 257 #undef __FUNCT__ 258 #define __FUNCT__ "PCBDDCSetLevel" 259 PetscErrorCode PCBDDCSetLevel(PC pc,PetscInt level) 260 { 261 PetscErrorCode ierr; 262 263 PetscFunctionBegin; 264 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 265 PetscValidLogicalCollectiveInt(pc,level,2); 266 ierr = PetscTryMethod(pc,"PCBDDCSetLevel_C",(PC,PetscInt),(pc,level));CHKERRQ(ierr); 267 PetscFunctionReturn(0); 268 } 269 270 #undef __FUNCT__ 271 #define __FUNCT__ "PCBDDCSetLevels_BDDC" 272 static PetscErrorCode PCBDDCSetLevels_BDDC(PC pc,PetscInt levels) 273 { 274 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 275 276 PetscFunctionBegin; 277 pcbddc->max_levels = levels; 278 PetscFunctionReturn(0); 279 } 280 281 #undef __FUNCT__ 282 #define __FUNCT__ "PCBDDCSetLevels" 283 /*@ 284 PCBDDCSetLevels - Sets the maximum number of levels for multilevel 285 286 Logically collective on PC 287 288 Input Parameters: 289 + pc - the preconditioning context 290 - levels - the maximum number of levels (max 9) 291 292 Options Database Keys: 293 . -pc_bddc_levels 294 295 Level: intermediate 296 297 Notes: 298 Default value is 0, i.e. traditional one-level BDDC 299 300 .seealso: PCBDDC, PCBDDCSetCoarseningRatio() 301 @*/ 302 PetscErrorCode PCBDDCSetLevels(PC pc,PetscInt levels) 303 { 304 PetscErrorCode ierr; 305 306 PetscFunctionBegin; 307 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 308 PetscValidLogicalCollectiveInt(pc,levels,2); 309 if (levels > 99) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Maximum number of levels for bddc is 99\n"); 310 ierr = PetscTryMethod(pc,"PCBDDCSetLevels_C",(PC,PetscInt),(pc,levels));CHKERRQ(ierr); 311 PetscFunctionReturn(0); 312 } 313 /* -------------------------------------------------------------------------- */ 314 315 #undef __FUNCT__ 316 #define __FUNCT__ "PCBDDCSetNullSpace_BDDC" 317 static PetscErrorCode PCBDDCSetNullSpace_BDDC(PC pc,MatNullSpace NullSpace) 318 { 319 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 320 PetscErrorCode ierr; 321 322 PetscFunctionBegin; 323 ierr = PetscObjectReference((PetscObject)NullSpace);CHKERRQ(ierr); 324 ierr = MatNullSpaceDestroy(&pcbddc->NullSpace);CHKERRQ(ierr); 325 pcbddc->NullSpace = NullSpace; 326 PetscFunctionReturn(0); 327 } 328 329 #undef __FUNCT__ 330 #define __FUNCT__ "PCBDDCSetNullSpace" 331 /*@ 332 PCBDDCSetNullSpace - Set nullspace for BDDC operator 333 334 Logically collective on PC and MatNullSpace 335 336 Input Parameters: 337 + pc - the preconditioning context 338 - NullSpace - Null space of the linear operator to be preconditioned (Pmat) 339 340 Level: intermediate 341 342 Notes: 343 344 .seealso: PCBDDC 345 @*/ 346 PetscErrorCode PCBDDCSetNullSpace(PC pc,MatNullSpace NullSpace) 347 { 348 PetscErrorCode ierr; 349 350 PetscFunctionBegin; 351 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 352 PetscValidHeaderSpecific(NullSpace,MAT_NULLSPACE_CLASSID,2); 353 PetscCheckSameComm(pc,1,NullSpace,2); 354 ierr = PetscTryMethod(pc,"PCBDDCSetNullSpace_C",(PC,MatNullSpace),(pc,NullSpace));CHKERRQ(ierr); 355 PetscFunctionReturn(0); 356 } 357 /* -------------------------------------------------------------------------- */ 358 359 #undef __FUNCT__ 360 #define __FUNCT__ "PCBDDCSetDirichletBoundaries_BDDC" 361 static PetscErrorCode PCBDDCSetDirichletBoundaries_BDDC(PC pc,IS DirichletBoundaries) 362 { 363 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 364 PetscErrorCode ierr; 365 366 PetscFunctionBegin; 367 /* last user setting takes precendence -> destroy any other customization */ 368 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 369 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 370 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 371 pcbddc->DirichletBoundaries = DirichletBoundaries; 372 pcbddc->recompute_topography = PETSC_TRUE; 373 PetscFunctionReturn(0); 374 } 375 376 #undef __FUNCT__ 377 #define __FUNCT__ "PCBDDCSetDirichletBoundaries" 378 /*@ 379 PCBDDCSetDirichletBoundaries - Set IS defining Dirichlet boundaries for the global problem. 380 381 Collective 382 383 Input Parameters: 384 + pc - the preconditioning context 385 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries 386 387 Level: intermediate 388 389 Notes: 390 Provide the information if you used MatZeroRows/Columns routines. Any process can list any global node 391 392 .seealso: PCBDDC, PCBDDCSetDirichletBoundariesLocal(), MatZeroRows(), MatZeroRowsColumns() 393 @*/ 394 PetscErrorCode PCBDDCSetDirichletBoundaries(PC pc,IS DirichletBoundaries) 395 { 396 PetscErrorCode ierr; 397 398 PetscFunctionBegin; 399 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 400 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 401 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 402 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundaries_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 403 PetscFunctionReturn(0); 404 } 405 /* -------------------------------------------------------------------------- */ 406 407 #undef __FUNCT__ 408 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal_BDDC" 409 static PetscErrorCode PCBDDCSetDirichletBoundariesLocal_BDDC(PC pc,IS DirichletBoundaries) 410 { 411 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 412 PetscErrorCode ierr; 413 414 PetscFunctionBegin; 415 /* last user setting takes precendence -> destroy any other customization */ 416 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 417 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 418 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 419 pcbddc->DirichletBoundariesLocal = DirichletBoundaries; 420 pcbddc->recompute_topography = PETSC_TRUE; 421 PetscFunctionReturn(0); 422 } 423 424 #undef __FUNCT__ 425 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal" 426 /*@ 427 PCBDDCSetDirichletBoundariesLocal - Set IS defining Dirichlet boundaries for the global problem in local ordering. 428 429 Collective 430 431 Input Parameters: 432 + pc - the preconditioning context 433 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries (in local ordering) 434 435 Level: intermediate 436 437 Notes: 438 439 .seealso: PCBDDC, PCBDDCSetDirichletBoundaries(), MatZeroRows(), MatZeroRowsColumns() 440 @*/ 441 PetscErrorCode PCBDDCSetDirichletBoundariesLocal(PC pc,IS DirichletBoundaries) 442 { 443 PetscErrorCode ierr; 444 445 PetscFunctionBegin; 446 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 447 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 448 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 449 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundariesLocal_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 450 PetscFunctionReturn(0); 451 } 452 /* -------------------------------------------------------------------------- */ 453 454 #undef __FUNCT__ 455 #define __FUNCT__ "PCBDDCSetNeumannBoundaries_BDDC" 456 static PetscErrorCode PCBDDCSetNeumannBoundaries_BDDC(PC pc,IS NeumannBoundaries) 457 { 458 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 459 PetscErrorCode ierr; 460 461 PetscFunctionBegin; 462 /* last user setting takes precendence -> destroy any other customization */ 463 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 464 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 465 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 466 pcbddc->NeumannBoundaries = NeumannBoundaries; 467 pcbddc->recompute_topography = PETSC_TRUE; 468 PetscFunctionReturn(0); 469 } 470 471 #undef __FUNCT__ 472 #define __FUNCT__ "PCBDDCSetNeumannBoundaries" 473 /*@ 474 PCBDDCSetNeumannBoundaries - Set IS defining Neumann boundaries for the global problem. 475 476 Collective 477 478 Input Parameters: 479 + pc - the preconditioning context 480 - NeumannBoundaries - parallel IS defining the Neumann boundaries 481 482 Level: intermediate 483 484 Notes: 485 Any process can list any global node 486 487 .seealso: PCBDDC, PCBDDCSetNeumannBoundariesLocal() 488 @*/ 489 PetscErrorCode PCBDDCSetNeumannBoundaries(PC pc,IS NeumannBoundaries) 490 { 491 PetscErrorCode ierr; 492 493 PetscFunctionBegin; 494 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 495 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 496 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 497 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundaries_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 498 PetscFunctionReturn(0); 499 } 500 /* -------------------------------------------------------------------------- */ 501 502 #undef __FUNCT__ 503 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal_BDDC" 504 static PetscErrorCode PCBDDCSetNeumannBoundariesLocal_BDDC(PC pc,IS NeumannBoundaries) 505 { 506 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 507 PetscErrorCode ierr; 508 509 PetscFunctionBegin; 510 /* last user setting takes precendence -> destroy any other customization */ 511 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 512 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 513 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 514 pcbddc->NeumannBoundariesLocal = NeumannBoundaries; 515 pcbddc->recompute_topography = PETSC_TRUE; 516 PetscFunctionReturn(0); 517 } 518 519 #undef __FUNCT__ 520 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal" 521 /*@ 522 PCBDDCSetNeumannBoundariesLocal - Set IS defining Neumann boundaries for the global problem in local ordering. 523 524 Collective 525 526 Input Parameters: 527 + pc - the preconditioning context 528 - NeumannBoundaries - parallel IS defining the subdomain part of Neumann boundaries (in local ordering) 529 530 Level: intermediate 531 532 Notes: 533 534 .seealso: PCBDDC, PCBDDCSetNeumannBoundaries() 535 @*/ 536 PetscErrorCode PCBDDCSetNeumannBoundariesLocal(PC pc,IS NeumannBoundaries) 537 { 538 PetscErrorCode ierr; 539 540 PetscFunctionBegin; 541 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 542 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 543 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 544 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundariesLocal_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 545 PetscFunctionReturn(0); 546 } 547 /* -------------------------------------------------------------------------- */ 548 549 #undef __FUNCT__ 550 #define __FUNCT__ "PCBDDCGetDirichletBoundaries_BDDC" 551 static PetscErrorCode PCBDDCGetDirichletBoundaries_BDDC(PC pc,IS *DirichletBoundaries) 552 { 553 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 554 555 PetscFunctionBegin; 556 *DirichletBoundaries = pcbddc->DirichletBoundaries; 557 PetscFunctionReturn(0); 558 } 559 560 #undef __FUNCT__ 561 #define __FUNCT__ "PCBDDCGetDirichletBoundaries" 562 /*@ 563 PCBDDCGetDirichletBoundaries - Get parallel IS for Dirichlet boundaries 564 565 Collective 566 567 Input Parameters: 568 . pc - the preconditioning context 569 570 Output Parameters: 571 . DirichletBoundaries - index set defining the Dirichlet boundaries 572 573 Level: intermediate 574 575 Notes: 576 The IS returned (if any) is the same passed in earlier by the user with PCBDDCSetDirichletBoundaries 577 578 .seealso: PCBDDC 579 @*/ 580 PetscErrorCode PCBDDCGetDirichletBoundaries(PC pc,IS *DirichletBoundaries) 581 { 582 PetscErrorCode ierr; 583 584 PetscFunctionBegin; 585 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 586 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundaries_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 587 PetscFunctionReturn(0); 588 } 589 /* -------------------------------------------------------------------------- */ 590 591 #undef __FUNCT__ 592 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal_BDDC" 593 static PetscErrorCode PCBDDCGetDirichletBoundariesLocal_BDDC(PC pc,IS *DirichletBoundaries) 594 { 595 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 596 597 PetscFunctionBegin; 598 *DirichletBoundaries = pcbddc->DirichletBoundariesLocal; 599 PetscFunctionReturn(0); 600 } 601 602 #undef __FUNCT__ 603 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal" 604 /*@ 605 PCBDDCGetDirichletBoundariesLocal - Get parallel IS for Dirichlet boundaries (in local ordering) 606 607 Collective 608 609 Input Parameters: 610 . pc - the preconditioning context 611 612 Output Parameters: 613 . DirichletBoundaries - index set defining the subdomain part of Dirichlet boundaries 614 615 Level: intermediate 616 617 Notes: 618 The IS returned could be the same passed in earlier by the user (if provided with PCBDDCSetDirichletBoundariesLocal) or a global-to-local map of the global IS (if provided with PCBDDCSetDirichletBoundaries). 619 In the latter case, the IS will be available after PCSetUp. 620 621 .seealso: PCBDDC 622 @*/ 623 PetscErrorCode PCBDDCGetDirichletBoundariesLocal(PC pc,IS *DirichletBoundaries) 624 { 625 PetscErrorCode ierr; 626 627 PetscFunctionBegin; 628 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 629 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundariesLocal_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 630 PetscFunctionReturn(0); 631 } 632 /* -------------------------------------------------------------------------- */ 633 634 #undef __FUNCT__ 635 #define __FUNCT__ "PCBDDCGetNeumannBoundaries_BDDC" 636 static PetscErrorCode PCBDDCGetNeumannBoundaries_BDDC(PC pc,IS *NeumannBoundaries) 637 { 638 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 639 640 PetscFunctionBegin; 641 *NeumannBoundaries = pcbddc->NeumannBoundaries; 642 PetscFunctionReturn(0); 643 } 644 645 #undef __FUNCT__ 646 #define __FUNCT__ "PCBDDCGetNeumannBoundaries" 647 /*@ 648 PCBDDCGetNeumannBoundaries - Get parallel IS for Neumann boundaries 649 650 Collective 651 652 Input Parameters: 653 . pc - the preconditioning context 654 655 Output Parameters: 656 . NeumannBoundaries - index set defining the Neumann boundaries 657 658 Level: intermediate 659 660 Notes: 661 The IS returned (if any) is the same passed in earlier by the user with PCBDDCSetNeumannBoundaries 662 663 .seealso: PCBDDC 664 @*/ 665 PetscErrorCode PCBDDCGetNeumannBoundaries(PC pc,IS *NeumannBoundaries) 666 { 667 PetscErrorCode ierr; 668 669 PetscFunctionBegin; 670 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 671 ierr = PetscUseMethod(pc,"PCBDDCGetNeumannBoundaries_C",(PC,IS*),(pc,NeumannBoundaries));CHKERRQ(ierr); 672 PetscFunctionReturn(0); 673 } 674 /* -------------------------------------------------------------------------- */ 675 676 #undef __FUNCT__ 677 #define __FUNCT__ "PCBDDCGetNeumannBoundariesLocal_BDDC" 678 static PetscErrorCode PCBDDCGetNeumannBoundariesLocal_BDDC(PC pc,IS *NeumannBoundaries) 679 { 680 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 681 682 PetscFunctionBegin; 683 *NeumannBoundaries = pcbddc->NeumannBoundariesLocal; 684 PetscFunctionReturn(0); 685 } 686 687 #undef __FUNCT__ 688 #define __FUNCT__ "PCBDDCGetNeumannBoundariesLocal" 689 /*@ 690 PCBDDCGetNeumannBoundariesLocal - Get parallel IS for Neumann boundaries (in local ordering) 691 692 Collective 693 694 Input Parameters: 695 . pc - the preconditioning context 696 697 Output Parameters: 698 . NeumannBoundaries - index set defining the subdomain part of Neumann boundaries 699 700 Level: intermediate 701 702 Notes: 703 The IS returned could be the same passed in earlier by the user (if provided with PCBDDCSetNeumannBoundariesLocal) or a global-to-local map of the global IS (if provided with PCBDDCSetNeumannBoundaries). 704 In the latter case, the IS will be available after PCSetUp. 705 706 .seealso: PCBDDC 707 @*/ 708 PetscErrorCode PCBDDCGetNeumannBoundariesLocal(PC pc,IS *NeumannBoundaries) 709 { 710 PetscErrorCode ierr; 711 712 PetscFunctionBegin; 713 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 714 ierr = PetscUseMethod(pc,"PCBDDCGetNeumannBoundariesLocal_C",(PC,IS*),(pc,NeumannBoundaries));CHKERRQ(ierr); 715 PetscFunctionReturn(0); 716 } 717 /* -------------------------------------------------------------------------- */ 718 719 #undef __FUNCT__ 720 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph_BDDC" 721 static PetscErrorCode PCBDDCSetLocalAdjacencyGraph_BDDC(PC pc, PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 722 { 723 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 724 PCBDDCGraph mat_graph = pcbddc->mat_graph; 725 PetscErrorCode ierr; 726 727 PetscFunctionBegin; 728 /* free old CSR */ 729 ierr = PCBDDCGraphResetCSR(mat_graph);CHKERRQ(ierr); 730 /* TODO: PCBDDCGraphSetAdjacency */ 731 /* get CSR into graph structure */ 732 if (copymode == PETSC_COPY_VALUES) { 733 ierr = PetscMalloc1(nvtxs+1,&mat_graph->xadj);CHKERRQ(ierr); 734 ierr = PetscMalloc1(xadj[nvtxs],&mat_graph->adjncy);CHKERRQ(ierr); 735 ierr = PetscMemcpy(mat_graph->xadj,xadj,(nvtxs+1)*sizeof(PetscInt));CHKERRQ(ierr); 736 ierr = PetscMemcpy(mat_graph->adjncy,adjncy,xadj[nvtxs]*sizeof(PetscInt));CHKERRQ(ierr); 737 } else if (copymode == PETSC_OWN_POINTER) { 738 mat_graph->xadj = (PetscInt*)xadj; 739 mat_graph->adjncy = (PetscInt*)adjncy; 740 } 741 mat_graph->nvtxs_csr = nvtxs; 742 PetscFunctionReturn(0); 743 } 744 745 #undef __FUNCT__ 746 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph" 747 /*@ 748 PCBDDCSetLocalAdjacencyGraph - Set adjacency structure (CSR graph) of the local matrix 749 750 Not collective 751 752 Input Parameters: 753 + pc - the preconditioning context 754 . nvtxs - number of local vertices of the graph (i.e., the size of the local problem) 755 . xadj, adjncy - the CSR graph 756 - copymode - either PETSC_COPY_VALUES or PETSC_OWN_POINTER. 757 758 Level: intermediate 759 760 Notes: 761 762 .seealso: PCBDDC,PetscCopyMode 763 @*/ 764 PetscErrorCode PCBDDCSetLocalAdjacencyGraph(PC pc,PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 765 { 766 void (*f)(void) = 0; 767 PetscErrorCode ierr; 768 769 PetscFunctionBegin; 770 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 771 PetscValidIntPointer(xadj,3); 772 PetscValidIntPointer(adjncy,4); 773 if (copymode != PETSC_COPY_VALUES && copymode != PETSC_OWN_POINTER) { 774 SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unsupported copy mode %d in %s\n",copymode,__FUNCT__); 775 } 776 ierr = PetscTryMethod(pc,"PCBDDCSetLocalAdjacencyGraph_C",(PC,PetscInt,const PetscInt[],const PetscInt[],PetscCopyMode),(pc,nvtxs,xadj,adjncy,copymode));CHKERRQ(ierr); 777 /* free arrays if PCBDDC is not the PC type */ 778 ierr = PetscObjectQueryFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",&f);CHKERRQ(ierr); 779 if (!f && copymode == PETSC_OWN_POINTER) { 780 ierr = PetscFree(xadj);CHKERRQ(ierr); 781 ierr = PetscFree(adjncy);CHKERRQ(ierr); 782 } 783 PetscFunctionReturn(0); 784 } 785 /* -------------------------------------------------------------------------- */ 786 787 #undef __FUNCT__ 788 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal_BDDC" 789 static PetscErrorCode PCBDDCSetDofsSplittingLocal_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 790 { 791 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 792 PetscInt i; 793 PetscErrorCode ierr; 794 795 PetscFunctionBegin; 796 /* Destroy ISes if they were already set */ 797 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 798 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 799 } 800 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 801 /* last user setting takes precendence -> destroy any other customization */ 802 for (i=0;i<pcbddc->n_ISForDofs;i++) { 803 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 804 } 805 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 806 pcbddc->n_ISForDofs = 0; 807 /* allocate space then set */ 808 if (n_is) { 809 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofsLocal);CHKERRQ(ierr); 810 } 811 for (i=0;i<n_is;i++) { 812 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 813 pcbddc->ISForDofsLocal[i]=ISForDofs[i]; 814 } 815 pcbddc->n_ISForDofsLocal=n_is; 816 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 817 pcbddc->recompute_topography = PETSC_TRUE; 818 PetscFunctionReturn(0); 819 } 820 821 #undef __FUNCT__ 822 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal" 823 /*@ 824 PCBDDCSetDofsSplittingLocal - Set index sets defining fields of the local subdomain matrix 825 826 Collective 827 828 Input Parameters: 829 + pc - the preconditioning context 830 . n_is - number of index sets defining the fields 831 - ISForDofs - array of IS describing the fields in local ordering 832 833 Level: intermediate 834 835 Notes: 836 n_is should be the same among processes. Not all nodes need to be listed: unlisted nodes will belong to the complement field. 837 838 .seealso: PCBDDC 839 @*/ 840 PetscErrorCode PCBDDCSetDofsSplittingLocal(PC pc,PetscInt n_is, IS ISForDofs[]) 841 { 842 PetscInt i; 843 PetscErrorCode ierr; 844 845 PetscFunctionBegin; 846 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 847 PetscValidLogicalCollectiveInt(pc,n_is,2); 848 for (i=0;i<n_is;i++) { 849 PetscCheckSameComm(pc,1,ISForDofs[i],3); 850 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 851 } 852 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplittingLocal_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 853 PetscFunctionReturn(0); 854 } 855 /* -------------------------------------------------------------------------- */ 856 857 #undef __FUNCT__ 858 #define __FUNCT__ "PCBDDCSetDofsSplitting_BDDC" 859 static PetscErrorCode PCBDDCSetDofsSplitting_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 860 { 861 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 862 PetscInt i; 863 PetscErrorCode ierr; 864 865 PetscFunctionBegin; 866 /* Destroy ISes if they were already set */ 867 for (i=0;i<pcbddc->n_ISForDofs;i++) { 868 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 869 } 870 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 871 /* last user setting takes precendence -> destroy any other customization */ 872 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 873 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 874 } 875 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 876 pcbddc->n_ISForDofsLocal = 0; 877 /* allocate space then set */ 878 if (n_is) { 879 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofs);CHKERRQ(ierr); 880 } 881 for (i=0;i<n_is;i++) { 882 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 883 pcbddc->ISForDofs[i]=ISForDofs[i]; 884 } 885 pcbddc->n_ISForDofs=n_is; 886 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 887 pcbddc->recompute_topography = PETSC_TRUE; 888 PetscFunctionReturn(0); 889 } 890 891 #undef __FUNCT__ 892 #define __FUNCT__ "PCBDDCSetDofsSplitting" 893 /*@ 894 PCBDDCSetDofsSplitting - Set index sets defining fields of the global matrix 895 896 Collective 897 898 Input Parameters: 899 + pc - the preconditioning context 900 . n_is - number of index sets defining the fields 901 - ISForDofs - array of IS describing the fields in global ordering 902 903 Level: intermediate 904 905 Notes: 906 Any process can list any global node. Not all nodes need to be listed: unlisted nodes will belong to the complement field. 907 908 .seealso: PCBDDC 909 @*/ 910 PetscErrorCode PCBDDCSetDofsSplitting(PC pc,PetscInt n_is, IS ISForDofs[]) 911 { 912 PetscInt i; 913 PetscErrorCode ierr; 914 915 PetscFunctionBegin; 916 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 917 PetscValidLogicalCollectiveInt(pc,n_is,2); 918 for (i=0;i<n_is;i++) { 919 PetscCheckSameComm(pc,1,ISForDofs[i],3); 920 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 921 } 922 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplitting_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 923 PetscFunctionReturn(0); 924 } 925 926 /* -------------------------------------------------------------------------- */ 927 #undef __FUNCT__ 928 #define __FUNCT__ "PCPreSolve_BDDC" 929 /* -------------------------------------------------------------------------- */ 930 /* 931 PCPreSolve_BDDC - Changes the right hand side and (if necessary) the initial 932 guess if a transformation of basis approach has been selected. 933 934 Input Parameter: 935 + pc - the preconditioner contex 936 937 Application Interface Routine: PCPreSolve() 938 939 Notes: 940 The interface routine PCPreSolve() is not usually called directly by 941 the user, but instead is called by KSPSolve(). 942 */ 943 static PetscErrorCode PCPreSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 944 { 945 PetscErrorCode ierr; 946 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 947 PC_IS *pcis = (PC_IS*)(pc->data); 948 Vec used_vec; 949 PetscBool copy_rhs = PETSC_TRUE; 950 951 PetscFunctionBegin; 952 /* if we are working with cg, one dirichlet solve can be avoided during Krylov iterations */ 953 if (ksp) { 954 PetscBool iscg; 955 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPCG,&iscg);CHKERRQ(ierr); 956 if (!iscg) { 957 ierr = PCBDDCSetUseExactDirichlet(pc,PETSC_FALSE);CHKERRQ(ierr); 958 } 959 } 960 /* Creates parallel work vectors used in presolve */ 961 if (!pcbddc->original_rhs) { 962 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->original_rhs);CHKERRQ(ierr); 963 } 964 if (!pcbddc->temp_solution) { 965 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->temp_solution);CHKERRQ(ierr); 966 } 967 968 if (x) { 969 ierr = PetscObjectReference((PetscObject)x);CHKERRQ(ierr); 970 used_vec = x; 971 } else { /* it can only happen when calling PCBDDCMatFETIDPGetRHS */ 972 ierr = PetscObjectReference((PetscObject)pcbddc->temp_solution);CHKERRQ(ierr); 973 used_vec = pcbddc->temp_solution; 974 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 975 } 976 977 /* hack into ksp data structure since PCPreSolve comes earlier than setting to zero the guess in src/ksp/ksp/interface/itfunc.c */ 978 if (ksp) { 979 /* store the flag for the initial guess since it will be restored back during PCPostSolve_BDDC */ 980 ierr = KSPGetInitialGuessNonzero(ksp,&pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 981 if (!pcbddc->ksp_guess_nonzero) { 982 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 983 } 984 } 985 986 pcbddc->rhs_change = PETSC_FALSE; 987 988 /* Take into account zeroed rows -> change rhs and store solution removed */ 989 if (rhs) { 990 IS dirIS = NULL; 991 992 /* DirichletBoundariesLocal may not be consistent among neighbours; gets a dirichlet dofs IS from graph (may be cached) */ 993 ierr = PCBDDCGraphGetDirichletDofs(pcbddc->mat_graph,&dirIS);CHKERRQ(ierr); 994 if (dirIS) { 995 Mat_IS *matis = (Mat_IS*)pc->pmat->data; 996 PetscInt dirsize,i,*is_indices; 997 PetscScalar *array_x; 998 const PetscScalar *array_diagonal; 999 1000 ierr = MatGetDiagonal(pc->pmat,pcis->vec1_global);CHKERRQ(ierr); 1001 ierr = VecPointwiseDivide(pcis->vec1_global,rhs,pcis->vec1_global);CHKERRQ(ierr); 1002 ierr = VecScatterBegin(matis->rctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1003 ierr = VecScatterEnd(matis->rctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1004 ierr = VecScatterBegin(matis->rctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1005 ierr = VecScatterEnd(matis->rctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1006 ierr = ISGetLocalSize(dirIS,&dirsize);CHKERRQ(ierr); 1007 ierr = VecGetArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1008 ierr = VecGetArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1009 ierr = ISGetIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1010 for (i=0; i<dirsize; i++) array_x[is_indices[i]] = array_diagonal[is_indices[i]]; 1011 ierr = ISRestoreIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1012 ierr = VecRestoreArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1013 ierr = VecRestoreArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1014 ierr = VecScatterBegin(matis->rctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1015 ierr = VecScatterEnd(matis->rctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1016 pcbddc->rhs_change = PETSC_TRUE; 1017 ierr = ISDestroy(&dirIS);CHKERRQ(ierr); 1018 } 1019 } 1020 1021 /* remove the computed solution or the initial guess from the rhs */ 1022 if (pcbddc->rhs_change || (ksp && pcbddc->ksp_guess_nonzero) ) { 1023 /* store the original rhs */ 1024 if (copy_rhs) { 1025 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1026 copy_rhs = PETSC_FALSE; 1027 } 1028 pcbddc->rhs_change = PETSC_TRUE; 1029 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1030 ierr = MatMultAdd(pc->pmat,used_vec,rhs,rhs);CHKERRQ(ierr); 1031 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1032 ierr = VecCopy(used_vec,pcbddc->temp_solution);CHKERRQ(ierr); 1033 if (ksp) { 1034 ierr = KSPSetInitialGuessNonzero(ksp,PETSC_FALSE);CHKERRQ(ierr); 1035 } 1036 } 1037 ierr = VecDestroy(&used_vec);CHKERRQ(ierr); 1038 1039 /* store partially computed solution and set initial guess */ 1040 if (x && pcbddc->use_exact_dirichlet_trick) { 1041 ierr = VecSet(x,0.0);CHKERRQ(ierr); 1042 ierr = VecScatterBegin(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1043 ierr = VecScatterEnd(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1044 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1045 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1046 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1047 if (ksp) { 1048 ierr = KSPSetInitialGuessNonzero(ksp,PETSC_TRUE);CHKERRQ(ierr); 1049 } 1050 } 1051 1052 if (pcbddc->ChangeOfBasisMatrix) { 1053 PCBDDCChange_ctx change_ctx; 1054 1055 /* get change ctx */ 1056 ierr = MatShellGetContext(pcbddc->new_global_mat,&change_ctx);CHKERRQ(ierr); 1057 1058 /* set current iteration matrix inside change context (change of basis has been already set into the ctx during PCSetUp) */ 1059 ierr = MatDestroy(&change_ctx->original_mat);CHKERRQ(ierr); 1060 ierr = PetscObjectReference((PetscObject)pc->mat);CHKERRQ(ierr); 1061 change_ctx->original_mat = pc->mat; 1062 1063 /* change iteration matrix */ 1064 ierr = MatDestroy(&pc->mat);CHKERRQ(ierr); 1065 ierr = PetscObjectReference((PetscObject)pcbddc->new_global_mat);CHKERRQ(ierr); 1066 pc->mat = pcbddc->new_global_mat; 1067 1068 /* store the original rhs */ 1069 if (copy_rhs) { 1070 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1071 copy_rhs = PETSC_FALSE; 1072 } 1073 1074 /* change rhs */ 1075 ierr = MatMultTranspose(change_ctx->global_change,rhs,pcis->vec1_global);CHKERRQ(ierr); 1076 ierr = VecCopy(pcis->vec1_global,rhs);CHKERRQ(ierr); 1077 pcbddc->rhs_change = PETSC_TRUE; 1078 } 1079 1080 /* remove nullspace if present */ 1081 if (ksp && x && pcbddc->NullSpace) { 1082 ierr = MatNullSpaceRemove(pcbddc->NullSpace,x);CHKERRQ(ierr); 1083 /* store the original rhs */ 1084 if (copy_rhs) { 1085 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1086 copy_rhs = PETSC_FALSE; 1087 } 1088 pcbddc->rhs_change = PETSC_TRUE; 1089 ierr = MatNullSpaceRemove(pcbddc->NullSpace,rhs);CHKERRQ(ierr); 1090 } 1091 PetscFunctionReturn(0); 1092 } 1093 1094 /* -------------------------------------------------------------------------- */ 1095 #undef __FUNCT__ 1096 #define __FUNCT__ "PCPostSolve_BDDC" 1097 /* -------------------------------------------------------------------------- */ 1098 /* 1099 PCPostSolve_BDDC - Changes the computed solution if a transformation of basis 1100 approach has been selected. Also, restores rhs to its original state. 1101 1102 Input Parameter: 1103 + pc - the preconditioner contex 1104 1105 Application Interface Routine: PCPostSolve() 1106 1107 Notes: 1108 The interface routine PCPostSolve() is not usually called directly by 1109 the user, but instead is called by KSPSolve(). 1110 */ 1111 static PetscErrorCode PCPostSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 1112 { 1113 PetscErrorCode ierr; 1114 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1115 1116 PetscFunctionBegin; 1117 if (pcbddc->ChangeOfBasisMatrix) { 1118 PCBDDCChange_ctx change_ctx; 1119 1120 /* get change ctx */ 1121 ierr = MatShellGetContext(pcbddc->new_global_mat,&change_ctx);CHKERRQ(ierr); 1122 1123 /* restore iteration matrix */ 1124 ierr = MatDestroy(&pc->mat);CHKERRQ(ierr); 1125 ierr = PetscObjectReference((PetscObject)change_ctx->original_mat);CHKERRQ(ierr); 1126 pc->mat = change_ctx->original_mat; 1127 1128 /* get solution in original basis */ 1129 if (x) { 1130 PC_IS *pcis = (PC_IS*)(pc->data); 1131 ierr = MatMult(change_ctx->global_change,x,pcis->vec1_global);CHKERRQ(ierr); 1132 ierr = VecCopy(pcis->vec1_global,x);CHKERRQ(ierr); 1133 } 1134 } 1135 1136 /* add solution removed in presolve */ 1137 if (x && pcbddc->rhs_change) { 1138 ierr = VecAXPY(x,1.0,pcbddc->temp_solution);CHKERRQ(ierr); 1139 } 1140 1141 /* restore rhs to its original state */ 1142 if (rhs && pcbddc->rhs_change) { 1143 ierr = VecCopy(pcbddc->original_rhs,rhs);CHKERRQ(ierr); 1144 } 1145 pcbddc->rhs_change = PETSC_FALSE; 1146 1147 /* restore ksp guess state */ 1148 if (ksp) { 1149 ierr = KSPSetInitialGuessNonzero(ksp,pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 1150 } 1151 PetscFunctionReturn(0); 1152 } 1153 /* -------------------------------------------------------------------------- */ 1154 #undef __FUNCT__ 1155 #define __FUNCT__ "PCSetUp_BDDC" 1156 /* -------------------------------------------------------------------------- */ 1157 /* 1158 PCSetUp_BDDC - Prepares for the use of the BDDC preconditioner 1159 by setting data structures and options. 1160 1161 Input Parameter: 1162 + pc - the preconditioner context 1163 1164 Application Interface Routine: PCSetUp() 1165 1166 Notes: 1167 The interface routine PCSetUp() is not usually called directly by 1168 the user, but instead is called by PCApply() if necessary. 1169 */ 1170 PetscErrorCode PCSetUp_BDDC(PC pc) 1171 { 1172 PetscErrorCode ierr; 1173 PC_BDDC* pcbddc = (PC_BDDC*)pc->data; 1174 Mat_IS* matis; 1175 MatNullSpace nearnullspace; 1176 PetscInt nrows,ncols; 1177 PetscBool computetopography,computesolvers,computesubschurs; 1178 PetscBool computeconstraintsmatrix; 1179 PetscBool new_nearnullspace_provided,ismatis; 1180 1181 PetscFunctionBegin; 1182 ierr = PetscObjectTypeCompare((PetscObject)pc->pmat,MATIS,&ismatis);CHKERRQ(ierr); 1183 if (!ismatis) { 1184 SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONG,"PCBDDC preconditioner requires matrix of type MATIS"); 1185 } 1186 ierr = MatGetSize(pc->pmat,&nrows,&ncols);CHKERRQ(ierr); 1187 if (nrows != ncols) { 1188 SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"PCBDDC preconditioner requires a square preconditioning matrix"); 1189 } 1190 matis = (Mat_IS*)pc->pmat->data; 1191 /* the following lines of code should be replaced by a better logic between PCIS, PCNN, PCBDDC and other future nonoverlapping preconditioners */ 1192 /* For BDDC we need to define a local "Neumann" problem different to that defined in PCISSetup 1193 Also, BDDC directly build the Dirichlet problem */ 1194 /* split work */ 1195 if (pc->setupcalled) { 1196 if (pc->flag == SAME_NONZERO_PATTERN) { 1197 computetopography = PETSC_FALSE; 1198 computesolvers = PETSC_TRUE; 1199 } else { /* DIFFERENT_NONZERO_PATTERN */ 1200 computetopography = PETSC_TRUE; 1201 computesolvers = PETSC_TRUE; 1202 } 1203 } else { 1204 computetopography = PETSC_TRUE; 1205 computesolvers = PETSC_TRUE; 1206 } 1207 if (pcbddc->recompute_topography) { 1208 computetopography = PETSC_TRUE; 1209 } 1210 computeconstraintsmatrix = PETSC_FALSE; 1211 if (pcbddc->adaptive_threshold > 0.0 && !pcbddc->use_deluxe_scaling) { 1212 SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Cannot compute adaptive constraints without deluxe scaling. Rerun with -pc_bddc_use_deluxe_scaling"); 1213 } 1214 pcbddc->adaptive_selection = (PetscBool)(pcbddc->adaptive_threshold > 0.0 && pcbddc->use_deluxe_scaling); 1215 if (pcbddc->adaptive_selection) pcbddc->use_faces = PETSC_TRUE; 1216 1217 computesubschurs = (PetscBool)(pcbddc->adaptive_selection || pcbddc->use_deluxe_scaling); 1218 if (pcbddc->faster_deluxe && pcbddc->adaptive_selection && pcbddc->use_change_of_basis) { 1219 SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Cannot compute faster deluxe if adaptivity and change of basis are both requested. Rerun with -pc_bddc_deluxe_faster false"); 1220 } 1221 /* Get stdout for dbg */ 1222 if (pcbddc->dbg_flag) { 1223 if (!pcbddc->dbg_viewer) { 1224 pcbddc->dbg_viewer = PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)pc)); 1225 ierr = PetscViewerASCIISynchronizedAllow(pcbddc->dbg_viewer,PETSC_TRUE);CHKERRQ(ierr); 1226 } 1227 ierr = PetscViewerASCIIAddTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1228 } 1229 1230 if (pcbddc->user_ChangeOfBasisMatrix) { 1231 /* use_change_of_basis flag is used to automatically compute a change of basis from constraints */ 1232 pcbddc->use_change_of_basis = PETSC_FALSE; 1233 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 1234 } else { 1235 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1236 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1237 pcbddc->local_mat = matis->A; 1238 } 1239 1240 /* workaround for reals */ 1241 #if !defined(PETSC_USE_COMPLEX) 1242 if (matis->A->symmetric_set) { 1243 ierr = MatSetOption(pcbddc->local_mat,MAT_HERMITIAN,matis->A->symmetric);CHKERRQ(ierr); 1244 } 1245 #endif 1246 1247 /* Set up all the "iterative substructuring" common block without computing solvers */ 1248 { 1249 Mat temp_mat; 1250 1251 temp_mat = matis->A; 1252 matis->A = pcbddc->local_mat; 1253 ierr = PCISSetUp(pc,PETSC_FALSE);CHKERRQ(ierr); 1254 pcbddc->local_mat = matis->A; 1255 matis->A = temp_mat; 1256 } 1257 1258 /* Analyze interface and setup sub_schurs data */ 1259 if (computetopography) { 1260 ierr = PCBDDCAnalyzeInterface(pc);CHKERRQ(ierr); 1261 computeconstraintsmatrix = PETSC_TRUE; 1262 } 1263 1264 /* Setup local dirichlet solver ksp_D and sub_schurs solvers */ 1265 if (computesolvers) { 1266 PCBDDCSubSchurs sub_schurs=pcbddc->sub_schurs; 1267 1268 if (computesubschurs && computetopography) { 1269 ierr = PCBDDCInitSubSchurs(pc);CHKERRQ(ierr); 1270 } 1271 if (sub_schurs->use_mumps) { 1272 if (computesubschurs) { 1273 ierr = PCBDDCSetUpSubSchurs(pc);CHKERRQ(ierr); 1274 } 1275 ierr = PCBDDCSetUpLocalSolvers(pc,PETSC_TRUE,PETSC_FALSE);CHKERRQ(ierr); 1276 } else { 1277 ierr = PCBDDCSetUpLocalSolvers(pc,PETSC_TRUE,PETSC_FALSE);CHKERRQ(ierr); 1278 if (computesubschurs) { 1279 ierr = PCBDDCSetUpSubSchurs(pc);CHKERRQ(ierr); 1280 } 1281 } 1282 if (pcbddc->adaptive_selection) { 1283 ierr = PCBDDCAdaptiveSelection(pc);CHKERRQ(ierr); 1284 computeconstraintsmatrix = PETSC_TRUE; 1285 } 1286 } 1287 1288 /* infer if NullSpace object attached to Mat via MatSetNearNullSpace has changed */ 1289 new_nearnullspace_provided = PETSC_FALSE; 1290 ierr = MatGetNearNullSpace(pc->pmat,&nearnullspace);CHKERRQ(ierr); 1291 if (pcbddc->onearnullspace) { /* already used nearnullspace */ 1292 if (!nearnullspace) { /* near null space attached to mat has been destroyed */ 1293 new_nearnullspace_provided = PETSC_TRUE; 1294 } else { 1295 /* determine if the two nullspaces are different (should be lightweight) */ 1296 if (nearnullspace != pcbddc->onearnullspace) { 1297 new_nearnullspace_provided = PETSC_TRUE; 1298 } else { /* maybe the user has changed the content of the nearnullspace so check vectors ObjectStateId */ 1299 PetscInt i; 1300 const Vec *nearnullvecs; 1301 PetscObjectState state; 1302 PetscInt nnsp_size; 1303 ierr = MatNullSpaceGetVecs(nearnullspace,NULL,&nnsp_size,&nearnullvecs);CHKERRQ(ierr); 1304 for (i=0;i<nnsp_size;i++) { 1305 ierr = PetscObjectStateGet((PetscObject)nearnullvecs[i],&state);CHKERRQ(ierr); 1306 if (pcbddc->onearnullvecs_state[i] != state) { 1307 new_nearnullspace_provided = PETSC_TRUE; 1308 break; 1309 } 1310 } 1311 } 1312 } 1313 } else { 1314 if (!nearnullspace) { /* both nearnullspaces are null */ 1315 new_nearnullspace_provided = PETSC_FALSE; 1316 } else { /* nearnullspace attached later */ 1317 new_nearnullspace_provided = PETSC_TRUE; 1318 } 1319 } 1320 1321 /* Setup constraints and related work vectors */ 1322 /* reset primal space flags */ 1323 pcbddc->new_primal_space = PETSC_FALSE; 1324 pcbddc->new_primal_space_local = PETSC_FALSE; 1325 if (computeconstraintsmatrix || new_nearnullspace_provided) { 1326 /* It also sets the primal space flags */ 1327 ierr = PCBDDCConstraintsSetUp(pc);CHKERRQ(ierr); 1328 /* Allocate needed local vectors (which depends on quantities defined during ConstraintsSetUp) */ 1329 ierr = PCBDDCSetUpLocalWorkVectors(pc);CHKERRQ(ierr); 1330 } 1331 1332 if (computesolvers || pcbddc->new_primal_space) { 1333 if (pcbddc->use_change_of_basis) { 1334 PC_IS *pcis = (PC_IS*)(pc->data); 1335 1336 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->ChangeOfBasisMatrix);CHKERRQ(ierr); 1337 /* get submatrices */ 1338 ierr = MatDestroy(&pcis->A_IB);CHKERRQ(ierr); 1339 ierr = MatDestroy(&pcis->A_BI);CHKERRQ(ierr); 1340 ierr = MatDestroy(&pcis->A_BB);CHKERRQ(ierr); 1341 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_BB);CHKERRQ(ierr); 1342 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_I_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_IB);CHKERRQ(ierr); 1343 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_I_local,MAT_INITIAL_MATRIX,&pcis->A_BI);CHKERRQ(ierr); 1344 /* set flag in pcis to not reuse submatrices during PCISCreate */ 1345 pcis->reusesubmatrices = PETSC_FALSE; 1346 } else if (!pcbddc->user_ChangeOfBasisMatrix) { 1347 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1348 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1349 pcbddc->local_mat = matis->A; 1350 } 1351 /* SetUp coarse and local Neumann solvers */ 1352 ierr = PCBDDCSetUpSolvers(pc);CHKERRQ(ierr); 1353 /* SetUp Scaling operator */ 1354 ierr = PCBDDCScalingSetUp(pc);CHKERRQ(ierr); 1355 } 1356 1357 if (pcbddc->dbg_flag) { 1358 ierr = PetscViewerASCIISubtractTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1359 } 1360 PetscFunctionReturn(0); 1361 } 1362 1363 /* -------------------------------------------------------------------------- */ 1364 /* 1365 PCApply_BDDC - Applies the BDDC operator to a vector. 1366 1367 Input Parameters: 1368 + pc - the preconditioner context 1369 - r - input vector (global) 1370 1371 Output Parameter: 1372 . z - output vector (global) 1373 1374 Application Interface Routine: PCApply() 1375 */ 1376 #undef __FUNCT__ 1377 #define __FUNCT__ "PCApply_BDDC" 1378 PetscErrorCode PCApply_BDDC(PC pc,Vec r,Vec z) 1379 { 1380 PC_IS *pcis = (PC_IS*)(pc->data); 1381 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1382 PetscInt n_B = pcis->n_B, n_D = pcis->n - n_B; 1383 PetscErrorCode ierr; 1384 const PetscScalar one = 1.0; 1385 const PetscScalar m_one = -1.0; 1386 const PetscScalar zero = 0.0; 1387 1388 /* This code is similar to that provided in nn.c for PCNN 1389 NN interface preconditioner changed to BDDC 1390 Added support for M_3 preconditioner in the reference article (code is active if pcbddc->switch_static == PETSC_TRUE) */ 1391 1392 PetscFunctionBegin; 1393 if (!pcbddc->use_exact_dirichlet_trick) { 1394 ierr = VecCopy(r,z);CHKERRQ(ierr); 1395 /* First Dirichlet solve */ 1396 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1397 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1398 /* 1399 Assembling right hand side for BDDC operator 1400 - pcis->vec1_D for the Dirichlet part (if needed, i.e. pcbddc->switch_static == PETSC_TRUE) 1401 - pcis->vec1_B the interface part of the global vector z 1402 */ 1403 if (n_D) { 1404 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1405 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1406 if (pcbddc->switch_static) { ierr = MatMultAdd(pcis->A_II,pcis->vec2_D,pcis->vec1_D,pcis->vec1_D);CHKERRQ(ierr); } 1407 ierr = MatMult(pcis->A_BI,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 1408 } else { 1409 ierr = VecSet(pcis->vec1_B,zero);CHKERRQ(ierr); 1410 } 1411 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1412 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1413 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 1414 } else { 1415 if (pcbddc->switch_static) { 1416 ierr = VecSet(pcis->vec1_D,zero);CHKERRQ(ierr); 1417 } 1418 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 1419 } 1420 1421 /* Apply interface preconditioner 1422 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 1423 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_FALSE);CHKERRQ(ierr); 1424 1425 /* Apply transpose of partition of unity operator */ 1426 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 1427 1428 /* Second Dirichlet solve and assembling of output */ 1429 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1430 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1431 if (n_B) { 1432 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 1433 if (pcbddc->switch_static) { ierr = MatMultAdd(pcis->A_II,pcis->vec1_D,pcis->vec3_D,pcis->vec3_D);CHKERRQ(ierr); } 1434 } else if (pcbddc->switch_static) { 1435 ierr = MatMult(pcis->A_II,pcis->vec1_D,pcis->vec3_D);CHKERRQ(ierr); 1436 } 1437 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 1438 if (!pcbddc->use_exact_dirichlet_trick) { 1439 if (pcbddc->switch_static) { 1440 ierr = VecAXPBYPCZ(pcis->vec2_D,m_one,one,m_one,pcis->vec4_D,pcis->vec1_D);CHKERRQ(ierr); 1441 } else { 1442 ierr = VecAXPBY(pcis->vec2_D,m_one,m_one,pcis->vec4_D);CHKERRQ(ierr); 1443 } 1444 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1445 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1446 } else { 1447 if (pcbddc->switch_static) { 1448 ierr = VecAXPBY(pcis->vec4_D,one,m_one,pcis->vec1_D);CHKERRQ(ierr); 1449 } else { 1450 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 1451 } 1452 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1453 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1454 } 1455 PetscFunctionReturn(0); 1456 } 1457 1458 /* -------------------------------------------------------------------------- */ 1459 /* 1460 PCApplyTranspose_BDDC - Applies the transpose of the BDDC operator to a vector. 1461 1462 Input Parameters: 1463 + pc - the preconditioner context 1464 - r - input vector (global) 1465 1466 Output Parameter: 1467 . z - output vector (global) 1468 1469 Application Interface Routine: PCApplyTranspose() 1470 */ 1471 #undef __FUNCT__ 1472 #define __FUNCT__ "PCApplyTranspose_BDDC" 1473 PetscErrorCode PCApplyTranspose_BDDC(PC pc,Vec r,Vec z) 1474 { 1475 PC_IS *pcis = (PC_IS*)(pc->data); 1476 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1477 PetscInt n_B = pcis->n_B, n_D = pcis->n - n_B; 1478 PetscErrorCode ierr; 1479 const PetscScalar one = 1.0; 1480 const PetscScalar m_one = -1.0; 1481 const PetscScalar zero = 0.0; 1482 1483 PetscFunctionBegin; 1484 if (!pcbddc->use_exact_dirichlet_trick) { 1485 ierr = VecCopy(r,z);CHKERRQ(ierr); 1486 /* First Dirichlet solve */ 1487 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1488 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1489 /* 1490 Assembling right hand side for BDDC operator 1491 - pcis->vec1_D for the Dirichlet part (if needed, i.e. pcbddc->switch_static == PETSC_TRUE) 1492 - pcis->vec1_B the interface part of the global vector z 1493 */ 1494 if (n_D) { 1495 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1496 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1497 if (pcbddc->switch_static) { ierr = MatMultTransposeAdd(pcis->A_II,pcis->vec2_D,pcis->vec1_D,pcis->vec1_D);CHKERRQ(ierr); } 1498 ierr = MatMultTranspose(pcis->A_IB,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 1499 } else { 1500 ierr = VecSet(pcis->vec1_B,zero);CHKERRQ(ierr); 1501 } 1502 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1503 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1504 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 1505 } else { 1506 if (pcbddc->switch_static) { 1507 ierr = VecSet(pcis->vec1_D,zero);CHKERRQ(ierr); 1508 } 1509 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 1510 } 1511 1512 /* Apply interface preconditioner 1513 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 1514 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_TRUE);CHKERRQ(ierr); 1515 1516 /* Apply transpose of partition of unity operator */ 1517 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 1518 1519 /* Second Dirichlet solve and assembling of output */ 1520 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1521 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1522 if (n_B) { 1523 ierr = MatMultTranspose(pcis->A_BI,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 1524 if (pcbddc->switch_static) { ierr = MatMultTransposeAdd(pcis->A_II,pcis->vec1_D,pcis->vec3_D,pcis->vec3_D);CHKERRQ(ierr); } 1525 } else if (pcbddc->switch_static) { 1526 ierr = MatMultTranspose(pcis->A_II,pcis->vec1_D,pcis->vec3_D);CHKERRQ(ierr); 1527 } 1528 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 1529 if (!pcbddc->use_exact_dirichlet_trick) { 1530 if (pcbddc->switch_static) { 1531 ierr = VecAXPBYPCZ(pcis->vec2_D,m_one,one,m_one,pcis->vec4_D,pcis->vec1_D);CHKERRQ(ierr); 1532 } else { 1533 ierr = VecAXPBY(pcis->vec2_D,m_one,m_one,pcis->vec4_D);CHKERRQ(ierr); 1534 } 1535 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1536 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1537 } else { 1538 if (pcbddc->switch_static) { 1539 ierr = VecAXPBY(pcis->vec4_D,one,m_one,pcis->vec1_D);CHKERRQ(ierr); 1540 } else { 1541 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 1542 } 1543 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1544 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1545 } 1546 PetscFunctionReturn(0); 1547 } 1548 /* -------------------------------------------------------------------------- */ 1549 1550 #undef __FUNCT__ 1551 #define __FUNCT__ "PCDestroy_BDDC" 1552 PetscErrorCode PCDestroy_BDDC(PC pc) 1553 { 1554 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1555 PetscErrorCode ierr; 1556 1557 PetscFunctionBegin; 1558 /* free data created by PCIS */ 1559 ierr = PCISDestroy(pc);CHKERRQ(ierr); 1560 /* free BDDC custom data */ 1561 ierr = PCBDDCResetCustomization(pc);CHKERRQ(ierr); 1562 /* destroy objects related to topography */ 1563 ierr = PCBDDCResetTopography(pc);CHKERRQ(ierr); 1564 /* free allocated graph structure */ 1565 ierr = PetscFree(pcbddc->mat_graph);CHKERRQ(ierr); 1566 /* free allocated sub schurs structure */ 1567 ierr = PetscFree(pcbddc->sub_schurs);CHKERRQ(ierr); 1568 /* destroy objects for scaling operator */ 1569 ierr = PCBDDCScalingDestroy(pc);CHKERRQ(ierr); 1570 ierr = PetscFree(pcbddc->deluxe_ctx);CHKERRQ(ierr); 1571 /* free solvers stuff */ 1572 ierr = PCBDDCResetSolvers(pc);CHKERRQ(ierr); 1573 /* free global vectors needed in presolve */ 1574 ierr = VecDestroy(&pcbddc->temp_solution);CHKERRQ(ierr); 1575 ierr = VecDestroy(&pcbddc->original_rhs);CHKERRQ(ierr); 1576 /* free stuff for change of basis hooks */ 1577 if (pcbddc->new_global_mat) { 1578 PCBDDCChange_ctx change_ctx; 1579 ierr = MatShellGetContext(pcbddc->new_global_mat,&change_ctx);CHKERRQ(ierr); 1580 ierr = MatDestroy(&change_ctx->original_mat);CHKERRQ(ierr); 1581 ierr = MatDestroy(&change_ctx->global_change);CHKERRQ(ierr); 1582 ierr = VecDestroyVecs(2,&change_ctx->work);CHKERRQ(ierr); 1583 ierr = PetscFree(change_ctx);CHKERRQ(ierr); 1584 } 1585 ierr = MatDestroy(&pcbddc->new_global_mat);CHKERRQ(ierr); 1586 /* remove functions */ 1587 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",NULL);CHKERRQ(ierr); 1588 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",NULL);CHKERRQ(ierr); 1589 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",NULL);CHKERRQ(ierr); 1590 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",NULL);CHKERRQ(ierr); 1591 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",NULL);CHKERRQ(ierr); 1592 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",NULL);CHKERRQ(ierr); 1593 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNullSpace_C",NULL);CHKERRQ(ierr); 1594 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 1595 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 1596 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 1597 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 1598 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 1599 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 1600 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 1601 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 1602 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",NULL);CHKERRQ(ierr); 1603 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",NULL);CHKERRQ(ierr); 1604 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",NULL);CHKERRQ(ierr); 1605 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",NULL);CHKERRQ(ierr); 1606 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",NULL);CHKERRQ(ierr); 1607 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",NULL);CHKERRQ(ierr); 1608 /* Free the private data structure */ 1609 ierr = PetscFree(pc->data);CHKERRQ(ierr); 1610 PetscFunctionReturn(0); 1611 } 1612 /* -------------------------------------------------------------------------- */ 1613 1614 #undef __FUNCT__ 1615 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS_BDDC" 1616 static PetscErrorCode PCBDDCMatFETIDPGetRHS_BDDC(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 1617 { 1618 FETIDPMat_ctx mat_ctx; 1619 Vec copy_standard_rhs; 1620 PC_IS* pcis; 1621 PC_BDDC* pcbddc; 1622 PetscErrorCode ierr; 1623 1624 PetscFunctionBegin; 1625 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 1626 pcis = (PC_IS*)mat_ctx->pc->data; 1627 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 1628 1629 /* 1630 change of basis for physical rhs if needed 1631 It also changes the rhs in case of dirichlet boundaries 1632 TODO: better management when FETIDP will have its own class 1633 */ 1634 ierr = VecDuplicate(standard_rhs,©_standard_rhs);CHKERRQ(ierr); 1635 ierr = VecCopy(standard_rhs,copy_standard_rhs);CHKERRQ(ierr); 1636 ierr = PCPreSolve_BDDC(mat_ctx->pc,NULL,copy_standard_rhs,NULL);CHKERRQ(ierr); 1637 /* store vectors for computation of fetidp final solution */ 1638 ierr = VecScatterBegin(pcis->global_to_D,copy_standard_rhs,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1639 ierr = VecScatterEnd(pcis->global_to_D,copy_standard_rhs,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1640 /* scale rhs since it should be unassembled */ 1641 /* TODO use counter scaling? (also below) */ 1642 ierr = VecScatterBegin(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1643 ierr = VecScatterEnd(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1644 /* Apply partition of unity */ 1645 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 1646 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,copy_standard_rhs,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 1647 if (!pcbddc->switch_static) { 1648 /* compute partially subassembled Schur complement right-hand side */ 1649 ierr = KSPSolve(pcbddc->ksp_D,mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 1650 ierr = MatMult(pcis->A_BI,pcis->vec1_D,pcis->vec1_B);CHKERRQ(ierr); 1651 ierr = VecAXPY(mat_ctx->temp_solution_B,-1.0,pcis->vec1_B);CHKERRQ(ierr); 1652 ierr = VecSet(copy_standard_rhs,0.0);CHKERRQ(ierr); 1653 ierr = VecScatterBegin(pcis->global_to_B,mat_ctx->temp_solution_B,copy_standard_rhs,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1654 ierr = VecScatterEnd(pcis->global_to_B,mat_ctx->temp_solution_B,copy_standard_rhs,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1655 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,copy_standard_rhs,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 1656 ierr = VecScatterBegin(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1657 ierr = VecScatterEnd(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1658 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 1659 } 1660 ierr = VecDestroy(©_standard_rhs);CHKERRQ(ierr); 1661 /* BDDC rhs */ 1662 ierr = VecCopy(mat_ctx->temp_solution_B,pcis->vec1_B);CHKERRQ(ierr); 1663 if (pcbddc->switch_static) { 1664 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 1665 } 1666 /* apply BDDC */ 1667 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 1668 /* Application of B_delta and assembling of rhs for fetidp fluxes */ 1669 ierr = VecSet(fetidp_flux_rhs,0.0);CHKERRQ(ierr); 1670 ierr = MatMult(mat_ctx->B_delta,pcis->vec1_B,mat_ctx->lambda_local);CHKERRQ(ierr); 1671 ierr = VecScatterBegin(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1672 ierr = VecScatterEnd(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1673 PetscFunctionReturn(0); 1674 } 1675 1676 #undef __FUNCT__ 1677 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS" 1678 /*@ 1679 PCBDDCMatFETIDPGetRHS - Compute the right-hand side for FETI-DP linear system using the physical right-hand side 1680 1681 Collective 1682 1683 Input Parameters: 1684 + fetidp_mat - the FETI-DP matrix object obtained by a call to PCBDDCCreateFETIDPOperators 1685 - standard_rhs - the right-hand side of the original linear system 1686 1687 Output Parameters: 1688 . fetidp_flux_rhs - the right-hand side for the FETI-DP linear system 1689 1690 Level: developer 1691 1692 Notes: 1693 1694 .seealso: PCBDDC, PCBDDCCreateFETIDPOperators, PCBDDCMatFETIDPGetSolution 1695 @*/ 1696 PetscErrorCode PCBDDCMatFETIDPGetRHS(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 1697 { 1698 FETIDPMat_ctx mat_ctx; 1699 PetscErrorCode ierr; 1700 1701 PetscFunctionBegin; 1702 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 1703 ierr = PetscTryMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetRHS_C",(Mat,Vec,Vec),(fetidp_mat,standard_rhs,fetidp_flux_rhs));CHKERRQ(ierr); 1704 PetscFunctionReturn(0); 1705 } 1706 /* -------------------------------------------------------------------------- */ 1707 1708 #undef __FUNCT__ 1709 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution_BDDC" 1710 static PetscErrorCode PCBDDCMatFETIDPGetSolution_BDDC(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 1711 { 1712 FETIDPMat_ctx mat_ctx; 1713 PC_IS* pcis; 1714 PC_BDDC* pcbddc; 1715 PetscErrorCode ierr; 1716 1717 PetscFunctionBegin; 1718 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 1719 pcis = (PC_IS*)mat_ctx->pc->data; 1720 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 1721 1722 /* apply B_delta^T */ 1723 ierr = VecScatterBegin(mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1724 ierr = VecScatterEnd (mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1725 ierr = MatMultTranspose(mat_ctx->B_delta,mat_ctx->lambda_local,pcis->vec1_B);CHKERRQ(ierr); 1726 /* compute rhs for BDDC application */ 1727 ierr = VecAYPX(pcis->vec1_B,-1.0,mat_ctx->temp_solution_B);CHKERRQ(ierr); 1728 if (pcbddc->switch_static) { 1729 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 1730 } 1731 /* apply BDDC */ 1732 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 1733 /* put values into standard global vector */ 1734 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1735 ierr = VecScatterEnd (pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1736 if (!pcbddc->switch_static) { 1737 /* compute values into the interior if solved for the partially subassembled Schur complement */ 1738 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec1_D);CHKERRQ(ierr); 1739 ierr = VecAXPY(mat_ctx->temp_solution_D,-1.0,pcis->vec1_D);CHKERRQ(ierr); 1740 ierr = KSPSolve(pcbddc->ksp_D,mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 1741 } 1742 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1743 ierr = VecScatterEnd (pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1744 /* final change of basis if needed 1745 Is also sums the dirichlet part removed during RHS assembling */ 1746 ierr = PCPostSolve_BDDC(mat_ctx->pc,NULL,NULL,standard_sol);CHKERRQ(ierr); 1747 PetscFunctionReturn(0); 1748 } 1749 1750 #undef __FUNCT__ 1751 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution" 1752 /*@ 1753 PCBDDCMatFETIDPGetSolution - Compute the physical solution using the solution of the FETI-DP linear system 1754 1755 Collective 1756 1757 Input Parameters: 1758 + fetidp_mat - the FETI-DP matrix obtained by a call to PCBDDCCreateFETIDPOperators 1759 - fetidp_flux_sol - the solution of the FETI-DP linear system 1760 1761 Output Parameters: 1762 . standard_sol - the solution defined on the physical domain 1763 1764 Level: developer 1765 1766 Notes: 1767 1768 .seealso: PCBDDC, PCBDDCCreateFETIDPOperators, PCBDDCMatFETIDPGetRHS 1769 @*/ 1770 PetscErrorCode PCBDDCMatFETIDPGetSolution(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 1771 { 1772 FETIDPMat_ctx mat_ctx; 1773 PetscErrorCode ierr; 1774 1775 PetscFunctionBegin; 1776 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 1777 ierr = PetscTryMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetSolution_C",(Mat,Vec,Vec),(fetidp_mat,fetidp_flux_sol,standard_sol));CHKERRQ(ierr); 1778 PetscFunctionReturn(0); 1779 } 1780 /* -------------------------------------------------------------------------- */ 1781 1782 extern PetscErrorCode FETIDPMatMult(Mat,Vec,Vec); 1783 extern PetscErrorCode FETIDPMatMultTranspose(Mat,Vec,Vec); 1784 extern PetscErrorCode PCBDDCDestroyFETIDPMat(Mat); 1785 extern PetscErrorCode FETIDPPCApply(PC,Vec,Vec); 1786 extern PetscErrorCode FETIDPPCApplyTranspose(PC,Vec,Vec); 1787 extern PetscErrorCode PCBDDCDestroyFETIDPPC(PC); 1788 1789 #undef __FUNCT__ 1790 #define __FUNCT__ "PCBDDCCreateFETIDPOperators_BDDC" 1791 static PetscErrorCode PCBDDCCreateFETIDPOperators_BDDC(PC pc, Mat *fetidp_mat, PC *fetidp_pc) 1792 { 1793 1794 FETIDPMat_ctx fetidpmat_ctx; 1795 Mat newmat; 1796 FETIDPPC_ctx fetidppc_ctx; 1797 PC newpc; 1798 MPI_Comm comm; 1799 PetscErrorCode ierr; 1800 1801 PetscFunctionBegin; 1802 ierr = PetscObjectGetComm((PetscObject)pc,&comm);CHKERRQ(ierr); 1803 /* FETIDP linear matrix */ 1804 ierr = PCBDDCCreateFETIDPMatContext(pc,&fetidpmat_ctx);CHKERRQ(ierr); 1805 ierr = PCBDDCSetupFETIDPMatContext(fetidpmat_ctx);CHKERRQ(ierr); 1806 ierr = MatCreateShell(comm,PETSC_DECIDE,PETSC_DECIDE,fetidpmat_ctx->n_lambda,fetidpmat_ctx->n_lambda,fetidpmat_ctx,&newmat);CHKERRQ(ierr); 1807 ierr = MatShellSetOperation(newmat,MATOP_MULT,(void (*)(void))FETIDPMatMult);CHKERRQ(ierr); 1808 ierr = MatShellSetOperation(newmat,MATOP_MULT_TRANSPOSE,(void (*)(void))FETIDPMatMultTranspose);CHKERRQ(ierr); 1809 ierr = MatShellSetOperation(newmat,MATOP_DESTROY,(void (*)(void))PCBDDCDestroyFETIDPMat);CHKERRQ(ierr); 1810 ierr = MatSetUp(newmat);CHKERRQ(ierr); 1811 /* FETIDP preconditioner */ 1812 ierr = PCBDDCCreateFETIDPPCContext(pc,&fetidppc_ctx);CHKERRQ(ierr); 1813 ierr = PCBDDCSetupFETIDPPCContext(newmat,fetidppc_ctx);CHKERRQ(ierr); 1814 ierr = PCCreate(comm,&newpc);CHKERRQ(ierr); 1815 ierr = PCSetType(newpc,PCSHELL);CHKERRQ(ierr); 1816 ierr = PCShellSetContext(newpc,fetidppc_ctx);CHKERRQ(ierr); 1817 ierr = PCShellSetApply(newpc,FETIDPPCApply);CHKERRQ(ierr); 1818 ierr = PCShellSetApplyTranspose(newpc,FETIDPPCApplyTranspose);CHKERRQ(ierr); 1819 ierr = PCShellSetDestroy(newpc,PCBDDCDestroyFETIDPPC);CHKERRQ(ierr); 1820 ierr = PCSetOperators(newpc,newmat,newmat);CHKERRQ(ierr); 1821 ierr = PCSetUp(newpc);CHKERRQ(ierr); 1822 /* return pointers for objects created */ 1823 *fetidp_mat=newmat; 1824 *fetidp_pc=newpc; 1825 PetscFunctionReturn(0); 1826 } 1827 1828 #undef __FUNCT__ 1829 #define __FUNCT__ "PCBDDCCreateFETIDPOperators" 1830 /*@ 1831 PCBDDCCreateFETIDPOperators - Create FETI-DP operators 1832 1833 Collective 1834 1835 Input Parameters: 1836 . pc - the BDDC preconditioning context (setup should have been called before) 1837 1838 Output Parameters: 1839 + fetidp_mat - shell FETI-DP matrix object 1840 - fetidp_pc - shell Dirichlet preconditioner for FETI-DP matrix 1841 1842 Options Database Keys: 1843 . -fetidp_fullyredundant <false> - use or not a fully redundant set of Lagrange multipliers 1844 1845 Level: developer 1846 1847 Notes: 1848 Currently the only operations provided for FETI-DP matrix are MatMult and MatMultTranspose 1849 1850 .seealso: PCBDDC, PCBDDCMatFETIDPGetRHS, PCBDDCMatFETIDPGetSolution 1851 @*/ 1852 PetscErrorCode PCBDDCCreateFETIDPOperators(PC pc, Mat *fetidp_mat, PC *fetidp_pc) 1853 { 1854 PetscErrorCode ierr; 1855 1856 PetscFunctionBegin; 1857 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 1858 if (pc->setupcalled) { 1859 ierr = PetscUseMethod(pc,"PCBDDCCreateFETIDPOperators_C",(PC,Mat*,PC*),(pc,fetidp_mat,fetidp_pc));CHKERRQ(ierr); 1860 } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"You must call PCSetup_BDDC() first \n"); 1861 PetscFunctionReturn(0); 1862 } 1863 /* -------------------------------------------------------------------------- */ 1864 /*MC 1865 PCBDDC - Balancing Domain Decomposition by Constraints. 1866 1867 An implementation of the BDDC preconditioner based on 1868 1869 .vb 1870 [1] C. R. Dohrmann. "An approximate BDDC preconditioner", Numerical Linear Algebra with Applications Volume 14, Issue 2, pages 149-168, March 2007 1871 [2] A. Klawonn and O. B. Widlund. "Dual-Primal FETI Methods for Linear Elasticity", http://cs.nyu.edu/csweb/Research/TechReports/TR2004-855/TR2004-855.pdf 1872 [3] J. Mandel, B. Sousedik, C. R. Dohrmann. "Multispace and Multilevel BDDC", http://arxiv.org/abs/0712.3977 1873 [4] C. Pechstein and C. R. Dohrmann. "Modern domain decomposition methods BDDC, deluxe scaling, and an algebraic approach", Seminar talk, Linz, December 2013, http://people.ricam.oeaw.ac.at/c.pechstein/pechstein-bddc2013.pdf 1874 .ve 1875 1876 The matrix to be preconditioned (Pmat) must be of type MATIS. 1877 1878 Currently works with MATIS matrices with local matrices of type MATSEQAIJ, MATSEQBAIJ or MATSEQSBAIJ, either with real or complex numbers. 1879 1880 It also works with unsymmetric and indefinite problems. 1881 1882 Unlike 'conventional' interface preconditioners, PCBDDC iterates over all degrees of freedom, not just those on the interface. This allows the use of approximate solvers on the subdomains. 1883 1884 Approximate local solvers are automatically adapted for singular linear problems (see [1]) if the user has provided the nullspace using PCBDDCSetNullSpace() 1885 1886 Boundary nodes are split in vertices, edges and faces classes using information from the local to global mapping of dofs and the local connectivity graph of nodes. The latter can be customized by using PCBDDCSetLocalAdjacencyGraph() 1887 Additional information on dofs can be provided by using PCBDDCSetDofsSplitting(), PCBDDCSetDirichletBoundaries(), PCBDDCSetNeumannBoundaries(), and PCBDDCSetPrimalVerticesLocalIS() 1888 1889 Constraints can be customized by attaching a MatNullSpace object to the MATIS matrix via MatSetNearNullSpace(). Non-singular modes are retained via SVD. 1890 1891 Change of basis is performed similarly to [2] when requested. When more than one constraint is present on a single connected component (i.e. an edge or a face), a robust method based on local QR factorizations is used. 1892 User defined change of basis can be passed to PCBDDC by using PCBDDCSetChangeOfBasisMat() 1893 1894 The PETSc implementation also supports multilevel BDDC [3]. Coarse grids are partitioned using a MatPartitioning object. 1895 1896 Adaptive selection of primal constraints [4] is supported for SPD systems with high-contrast in the coefficients if MUMPS is present. Future versions of the code will also consider using MKL_PARDISO or PASTIX. 1897 1898 An experimental interface to the FETI-DP method is available. FETI-DP operators could be created using PCBDDCCreateFETIDPOperators(). A stand-alone class for the FETI-DP method will be provided in the next releases. 1899 Deluxe scaling is not supported yet for FETI-DP. 1900 1901 Options Database Keys (some of them, run with -h for a complete list): 1902 1903 . -pc_bddc_use_vertices <true> - use or not vertices in primal space 1904 . -pc_bddc_use_edges <true> - use or not edges in primal space 1905 . -pc_bddc_use_faces <false> - use or not faces in primal space 1906 . -pc_bddc_symmetric <true> - symmetric computation of primal basis functions. Specify false for unsymmetric problems 1907 . -pc_bddc_use_change_of_basis <false> - use change of basis approach (on edges only) 1908 . -pc_bddc_use_change_on_faces <false> - use change of basis approach on faces if change of basis has been requested 1909 . -pc_bddc_switch_static <false> - switches from M_2 (default) to M_3 operator (see reference article [1]) 1910 . -pc_bddc_levels <0> - maximum number of levels for multilevel 1911 . -pc_bddc_coarsening_ratio <8> - number of subdomains which will be aggregated together at the coarser level (e.g. H/h ratio at the coarser level, significative only in the multilevel case) 1912 . -pc_bddc_redistribute <0> - size of a subset of processors where the coarse problem will be remapped (the value is ignored if not at the coarsest level) 1913 . -pc_bddc_use_deluxe_scaling <false> - use deluxe scaling 1914 . -pc_bddc_schur_layers <-1> - select the economic version of deluxe scaling by specifying the number of layers (-1 corresponds to the original deluxe scaling) 1915 . -pc_bddc_adaptive_threshold <0.0> - when a value greater than one is specified, adaptive selection of constraints is performed on edges and faces (requires deluxe scaling and MUMPS installed) 1916 - -pc_bddc_check_level <0> - set verbosity level of debugging output 1917 1918 Options for Dirichlet, Neumann or coarse solver can be set with 1919 .vb 1920 -pc_bddc_dirichlet_ 1921 -pc_bddc_neumann_ 1922 -pc_bddc_coarse_ 1923 .ve 1924 e.g -pc_bddc_dirichlet_ksp_type richardson -pc_bddc_dirichlet_pc_type gamg. PCBDDC uses by default KPSPREONLY and PCLU. 1925 1926 When using a multilevel approach, solvers' options at the N-th level (N > 1) can be specified as 1927 .vb 1928 -pc_bddc_dirichlet_lN_ 1929 -pc_bddc_neumann_lN_ 1930 -pc_bddc_coarse_lN_ 1931 .ve 1932 Note that level number ranges from the finest (0) to the coarsest (N). 1933 In order to specify options for the BDDC operators at the coarser levels (and not for the solvers), prepend -pc_bddc_coarse_ or -pc_bddc_coarse_l to the option, e.g. 1934 .vb 1935 -pc_bddc_coarse_pc_bddc_adaptive_threshold 5 -pc_bddc_coarse_l1_pc_bddc_redistribute 3 1936 .ve 1937 will use a threshold of 5 for constraints' selection at the first coarse level and will redistribute the coarse problem of the first coarse level on 3 processors 1938 1939 Level: intermediate 1940 1941 Developer notes: 1942 1943 Contributed by Stefano Zampini 1944 1945 .seealso: PCCreate(), PCSetType(), PCType (for list of available types), PC, MATIS 1946 M*/ 1947 1948 #undef __FUNCT__ 1949 #define __FUNCT__ "PCCreate_BDDC" 1950 PETSC_EXTERN PetscErrorCode PCCreate_BDDC(PC pc) 1951 { 1952 PetscErrorCode ierr; 1953 PC_BDDC *pcbddc; 1954 1955 PetscFunctionBegin; 1956 /* Creates the private data structure for this preconditioner and attach it to the PC object. */ 1957 ierr = PetscNewLog(pc,&pcbddc);CHKERRQ(ierr); 1958 pc->data = (void*)pcbddc; 1959 1960 /* create PCIS data structure */ 1961 ierr = PCISCreate(pc);CHKERRQ(ierr); 1962 1963 /* BDDC customization */ 1964 pcbddc->use_local_adj = PETSC_TRUE; 1965 pcbddc->use_vertices = PETSC_TRUE; 1966 pcbddc->use_edges = PETSC_TRUE; 1967 pcbddc->use_faces = PETSC_FALSE; 1968 pcbddc->use_change_of_basis = PETSC_FALSE; 1969 pcbddc->use_change_on_faces = PETSC_FALSE; 1970 pcbddc->switch_static = PETSC_FALSE; 1971 pcbddc->use_nnsp_true = PETSC_FALSE; 1972 pcbddc->use_qr_single = PETSC_FALSE; 1973 pcbddc->symmetric_primal = PETSC_TRUE; 1974 pcbddc->dbg_flag = 0; 1975 /* private */ 1976 pcbddc->local_primal_size = 0; 1977 pcbddc->local_primal_size_cc = 0; 1978 pcbddc->local_primal_ref_node = 0; 1979 pcbddc->local_primal_ref_mult = 0; 1980 pcbddc->n_vertices = 0; 1981 pcbddc->primal_indices_local_idxs = 0; 1982 pcbddc->recompute_topography = PETSC_FALSE; 1983 pcbddc->coarse_size = -1; 1984 pcbddc->new_primal_space = PETSC_FALSE; 1985 pcbddc->new_primal_space_local = PETSC_FALSE; 1986 pcbddc->global_primal_indices = 0; 1987 pcbddc->onearnullspace = 0; 1988 pcbddc->onearnullvecs_state = 0; 1989 pcbddc->user_primal_vertices = 0; 1990 pcbddc->NullSpace = 0; 1991 pcbddc->temp_solution = 0; 1992 pcbddc->original_rhs = 0; 1993 pcbddc->local_mat = 0; 1994 pcbddc->ChangeOfBasisMatrix = 0; 1995 pcbddc->user_ChangeOfBasisMatrix = 0; 1996 pcbddc->new_global_mat = 0; 1997 pcbddc->coarse_vec = 0; 1998 pcbddc->coarse_ksp = 0; 1999 pcbddc->coarse_phi_B = 0; 2000 pcbddc->coarse_phi_D = 0; 2001 pcbddc->coarse_psi_B = 0; 2002 pcbddc->coarse_psi_D = 0; 2003 pcbddc->vec1_P = 0; 2004 pcbddc->vec1_R = 0; 2005 pcbddc->vec2_R = 0; 2006 pcbddc->local_auxmat1 = 0; 2007 pcbddc->local_auxmat2 = 0; 2008 pcbddc->R_to_B = 0; 2009 pcbddc->R_to_D = 0; 2010 pcbddc->ksp_D = 0; 2011 pcbddc->ksp_R = 0; 2012 pcbddc->NeumannBoundaries = 0; 2013 pcbddc->NeumannBoundariesLocal = 0; 2014 pcbddc->DirichletBoundaries = 0; 2015 pcbddc->DirichletBoundariesLocal = 0; 2016 pcbddc->user_provided_isfordofs = PETSC_FALSE; 2017 pcbddc->n_ISForDofs = 0; 2018 pcbddc->n_ISForDofsLocal = 0; 2019 pcbddc->ISForDofs = 0; 2020 pcbddc->ISForDofsLocal = 0; 2021 pcbddc->ConstraintMatrix = 0; 2022 pcbddc->use_exact_dirichlet_trick = PETSC_TRUE; 2023 pcbddc->coarse_loc_to_glob = 0; 2024 pcbddc->coarsening_ratio = 8; 2025 pcbddc->coarse_adj_red = 0; 2026 pcbddc->current_level = 0; 2027 pcbddc->max_levels = 0; 2028 pcbddc->use_coarse_estimates = PETSC_FALSE; 2029 pcbddc->redistribute_coarse = 0; 2030 pcbddc->coarse_subassembling = 0; 2031 pcbddc->coarse_subassembling_init = 0; 2032 2033 /* create local graph structure */ 2034 ierr = PCBDDCGraphCreate(&pcbddc->mat_graph);CHKERRQ(ierr); 2035 2036 /* scaling */ 2037 pcbddc->work_scaling = 0; 2038 pcbddc->use_deluxe_scaling = PETSC_FALSE; 2039 pcbddc->faster_deluxe = PETSC_FALSE; 2040 2041 /* create sub schurs structure */ 2042 ierr = PCBDDCSubSchursCreate(&pcbddc->sub_schurs);CHKERRQ(ierr); 2043 pcbddc->sub_schurs_rebuild = PETSC_FALSE; 2044 pcbddc->sub_schurs_layers = -1; 2045 pcbddc->sub_schurs_use_useradj = PETSC_FALSE; 2046 2047 pcbddc->computed_rowadj = PETSC_FALSE; 2048 2049 /* adaptivity */ 2050 pcbddc->adaptive_threshold = 0.0; 2051 pcbddc->adaptive_nmax = 0; 2052 pcbddc->adaptive_nmin = 0; 2053 2054 /* function pointers */ 2055 pc->ops->apply = PCApply_BDDC; 2056 pc->ops->applytranspose = PCApplyTranspose_BDDC; 2057 pc->ops->setup = PCSetUp_BDDC; 2058 pc->ops->destroy = PCDestroy_BDDC; 2059 pc->ops->setfromoptions = PCSetFromOptions_BDDC; 2060 pc->ops->view = 0; 2061 pc->ops->applyrichardson = 0; 2062 pc->ops->applysymmetricleft = 0; 2063 pc->ops->applysymmetricright = 0; 2064 pc->ops->presolve = PCPreSolve_BDDC; 2065 pc->ops->postsolve = PCPostSolve_BDDC; 2066 2067 /* composing function */ 2068 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",PCBDDCSetChangeOfBasisMat_BDDC);CHKERRQ(ierr); 2069 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",PCBDDCSetPrimalVerticesLocalIS_BDDC);CHKERRQ(ierr); 2070 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",PCBDDCSetCoarseningRatio_BDDC);CHKERRQ(ierr); 2071 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",PCBDDCSetLevel_BDDC);CHKERRQ(ierr); 2072 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",PCBDDCSetUseExactDirichlet_BDDC);CHKERRQ(ierr); 2073 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",PCBDDCSetLevels_BDDC);CHKERRQ(ierr); 2074 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNullSpace_C",PCBDDCSetNullSpace_BDDC);CHKERRQ(ierr); 2075 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",PCBDDCSetDirichletBoundaries_BDDC);CHKERRQ(ierr); 2076 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",PCBDDCSetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 2077 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",PCBDDCSetNeumannBoundaries_BDDC);CHKERRQ(ierr); 2078 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",PCBDDCSetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 2079 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",PCBDDCGetDirichletBoundaries_BDDC);CHKERRQ(ierr); 2080 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",PCBDDCGetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 2081 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",PCBDDCGetNeumannBoundaries_BDDC);CHKERRQ(ierr); 2082 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",PCBDDCGetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 2083 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",PCBDDCSetDofsSplitting_BDDC);CHKERRQ(ierr); 2084 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",PCBDDCSetDofsSplittingLocal_BDDC);CHKERRQ(ierr); 2085 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",PCBDDCSetLocalAdjacencyGraph_BDDC);CHKERRQ(ierr); 2086 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",PCBDDCCreateFETIDPOperators_BDDC);CHKERRQ(ierr); 2087 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",PCBDDCMatFETIDPGetRHS_BDDC);CHKERRQ(ierr); 2088 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",PCBDDCMatFETIDPGetSolution_BDDC);CHKERRQ(ierr); 2089 PetscFunctionReturn(0); 2090 } 2091 2092