1 /* TODOLIST 2 3 ConstraintsSetup 4 - tolerances for constraints as an option (take care of single precision!) 5 6 Solvers 7 - Add support for cholesky for coarse solver (similar to local solvers) 8 - Propagate ksp prefixes for solvers to mat objects? 9 - Propagate nearnullspace info among levels 10 11 User interface 12 - ** DofSplitting and DM attached to pc? 13 14 Debugging output 15 - * Better management of verbosity levels of debugging output 16 17 Build 18 - make runexe59 19 20 Extra 21 - *** Is it possible to work with PCBDDCGraph on boundary indices only (less memory consumed)? 22 - Change of basis approach does not work with my nonlinear mechanics example. why? (seems not an issue with l2gmap) 23 - BDDC with MG framework? 24 25 FETIDP 26 - Move FETIDP code to its own classes 27 28 MATIS related operations contained in BDDC code 29 - Provide general case for subassembling 30 - *** Preallocation routines in MatISGetMPIAXAIJ 31 32 */ 33 34 /* ---------------------------------------------------------------------------------------------------------------------------------------------- 35 Implementation of BDDC preconditioner based on: 36 C. Dohrmann "An approximate BDDC preconditioner", Numerical Linear Algebra with Applications Volume 14, Issue 2, pages 149-168, March 2007 37 ---------------------------------------------------------------------------------------------------------------------------------------------- */ 38 39 #include <../src/ksp/pc/impls/bddc/bddc.h> /*I "petscpc.h" I*/ /* includes for fortran wrappers */ 40 #include <../src/ksp/pc/impls/bddc/bddcprivate.h> 41 #include <petscblaslapack.h> 42 43 /* -------------------------------------------------------------------------- */ 44 #undef __FUNCT__ 45 #define __FUNCT__ "PCSetFromOptions_BDDC" 46 PetscErrorCode PCSetFromOptions_BDDC(PC pc) 47 { 48 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 49 PetscErrorCode ierr; 50 51 PetscFunctionBegin; 52 ierr = PetscOptionsHead("BDDC options");CHKERRQ(ierr); 53 /* Verbose debugging */ 54 ierr = PetscOptionsInt("-pc_bddc_check_level","Verbose output for PCBDDC (intended for debug)","none",pcbddc->dbg_flag,&pcbddc->dbg_flag,NULL);CHKERRQ(ierr); 55 /* Primal space cumstomization */ 56 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); 57 ierr = PetscOptionsBool("-pc_bddc_use_vertices","Use or not corner dofs in coarse space","none",pcbddc->use_vertices,&pcbddc->use_vertices,NULL);CHKERRQ(ierr); 58 ierr = PetscOptionsBool("-pc_bddc_use_edges","Use or not edge constraints in coarse space","none",pcbddc->use_edges,&pcbddc->use_edges,NULL);CHKERRQ(ierr); 59 ierr = PetscOptionsBool("-pc_bddc_use_faces","Use or not face constraints in coarse space","none",pcbddc->use_faces,&pcbddc->use_faces,NULL);CHKERRQ(ierr); 60 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); 61 ierr = PetscOptionsBool("-pc_bddc_use_qr_single","Use QR factorization for single constraints on cc (QR is always used for multiple constraints on the same cc)","none",pcbddc->use_qr_single,&pcbddc->use_qr_single,NULL);CHKERRQ(ierr); 62 /* Change of basis */ 63 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); 64 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); 65 if (!pcbddc->use_change_of_basis) { 66 pcbddc->use_change_on_faces = PETSC_FALSE; 67 } 68 /* Switch between M_2 (default) and M_3 preconditioners (as defined by C. Dohrmann in the ref. article) */ 69 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); 70 ierr = PetscOptionsInt("-pc_bddc_coarse_redistribute","Number of procs where to redistribute coarse problem","none",pcbddc->redistribute_coarse,&pcbddc->redistribute_coarse,NULL);CHKERRQ(ierr); 71 ierr = PetscOptionsInt("-pc_bddc_coarsening_ratio","Set coarsening ratio used in multilevel coarsening","none",pcbddc->coarsening_ratio,&pcbddc->coarsening_ratio,NULL);CHKERRQ(ierr); 72 ierr = PetscOptionsInt("-pc_bddc_levels","Set maximum number of levels for multilevel","none",pcbddc->max_levels,&pcbddc->max_levels,NULL);CHKERRQ(ierr); 73 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); 74 ierr = PetscOptionsBool("-pc_bddc_use_deluxe_scaling","Use deluxe scaling for BDDC","none",pcbddc->use_deluxe_scaling,&pcbddc->use_deluxe_scaling,NULL);CHKERRQ(ierr); 75 ierr = PetscOptionsInt("-pc_bddc_schur_threshold","Schur principal minors smaller than this value are explicilty computed (-1 computes all)","none",pcbddc->sub_schurs_threshold,&pcbddc->sub_schurs_threshold,NULL);CHKERRQ(ierr); 76 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); 77 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); 78 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); 79 ierr = PetscOptionsScalar("-pc_bddc_adaptive_threshold","Threshold to be used for adaptive selection of constraints","none",pcbddc->adaptive_threshold,&pcbddc->adaptive_threshold,NULL);CHKERRQ(ierr); 80 ierr = PetscOptionsInt("-pc_bddc_adaptive_nmin","Minimum number of constraints per connected components","none",pcbddc->adaptive_nmin,&pcbddc->adaptive_nmin,NULL);CHKERRQ(ierr); 81 ierr = PetscOptionsInt("-pc_bddc_adaptive_nmax","Maximum number of constraints per connected components","none",pcbddc->adaptive_nmax,&pcbddc->adaptive_nmax,NULL);CHKERRQ(ierr); 82 ierr = PetscOptionsTail();CHKERRQ(ierr); 83 PetscFunctionReturn(0); 84 } 85 /* -------------------------------------------------------------------------- */ 86 #undef __FUNCT__ 87 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat_BDDC" 88 static PetscErrorCode PCBDDCSetChangeOfBasisMat_BDDC(PC pc, Mat change) 89 { 90 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 91 PetscErrorCode ierr; 92 93 PetscFunctionBegin; 94 ierr = MatDestroy(&pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 95 ierr = PetscObjectReference((PetscObject)change);CHKERRQ(ierr); 96 pcbddc->user_ChangeOfBasisMatrix = change; 97 PetscFunctionReturn(0); 98 } 99 #undef __FUNCT__ 100 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat" 101 /*@ 102 PCBDDCSetChangeOfBasisMat - Set user defined change of basis for dofs 103 104 Collective on PC 105 106 Input Parameters: 107 + pc - the preconditioning context 108 - change - the change of basis matrix 109 110 Level: intermediate 111 112 Notes: 113 114 .seealso: PCBDDC 115 @*/ 116 PetscErrorCode PCBDDCSetChangeOfBasisMat(PC pc, Mat change) 117 { 118 PetscErrorCode ierr; 119 120 PetscFunctionBegin; 121 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 122 PetscValidHeaderSpecific(change,MAT_CLASSID,2); 123 PetscCheckSameComm(pc,1,change,2); 124 if (pc->mat) { 125 PetscInt rows_c,cols_c,rows,cols; 126 ierr = MatGetSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 127 ierr = MatGetSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 128 if (rows_c != rows) { 129 SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of rows for change of basis matrix! %d != %d",rows_c,rows); 130 } 131 if (cols_c != cols) { 132 SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of columns for change of basis matrix! %d != %d",cols_c,cols); 133 } 134 ierr = MatGetLocalSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 135 ierr = MatGetLocalSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 136 if (rows_c != rows) { 137 SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of local rows for change of basis matrix! %d != %d",rows_c,rows); 138 } 139 if (cols_c != cols) { 140 SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of local columns for change of basis matrix! %d != %d",cols_c,cols); 141 } 142 } 143 ierr = PetscTryMethod(pc,"PCBDDCSetChangeOfBasisMat_C",(PC,Mat),(pc,change));CHKERRQ(ierr); 144 PetscFunctionReturn(0); 145 } 146 /* -------------------------------------------------------------------------- */ 147 #undef __FUNCT__ 148 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS_BDDC" 149 static PetscErrorCode PCBDDCSetPrimalVerticesLocalIS_BDDC(PC pc, IS PrimalVertices) 150 { 151 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 152 PetscErrorCode ierr; 153 154 PetscFunctionBegin; 155 ierr = ISDestroy(&pcbddc->user_primal_vertices);CHKERRQ(ierr); 156 ierr = PetscObjectReference((PetscObject)PrimalVertices);CHKERRQ(ierr); 157 pcbddc->user_primal_vertices = PrimalVertices; 158 PetscFunctionReturn(0); 159 } 160 #undef __FUNCT__ 161 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS" 162 /*@ 163 PCBDDCSetPrimalVerticesLocalIS - Set additional user defined primal vertices in PCBDDC 164 165 Not collective 166 167 Input Parameters: 168 + pc - the preconditioning context 169 - PrimalVertices - index set of primal vertices in local numbering 170 171 Level: intermediate 172 173 Notes: 174 175 .seealso: PCBDDC 176 @*/ 177 PetscErrorCode PCBDDCSetPrimalVerticesLocalIS(PC pc, IS PrimalVertices) 178 { 179 PetscErrorCode ierr; 180 181 PetscFunctionBegin; 182 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 183 PetscValidHeaderSpecific(PrimalVertices,IS_CLASSID,2); 184 ierr = PetscTryMethod(pc,"PCBDDCSetPrimalVerticesLocalIS_C",(PC,IS),(pc,PrimalVertices));CHKERRQ(ierr); 185 PetscFunctionReturn(0); 186 } 187 /* -------------------------------------------------------------------------- */ 188 #undef __FUNCT__ 189 #define __FUNCT__ "PCBDDCSetCoarseningRatio_BDDC" 190 static PetscErrorCode PCBDDCSetCoarseningRatio_BDDC(PC pc,PetscInt k) 191 { 192 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 193 194 PetscFunctionBegin; 195 pcbddc->coarsening_ratio = k; 196 PetscFunctionReturn(0); 197 } 198 199 #undef __FUNCT__ 200 #define __FUNCT__ "PCBDDCSetCoarseningRatio" 201 /*@ 202 PCBDDCSetCoarseningRatio - Set coarsening ratio used in multilevel 203 204 Logically collective on PC 205 206 Input Parameters: 207 + pc - the preconditioning context 208 - k - coarsening ratio (H/h at the coarser level) 209 210 Approximatively k subdomains at the finer level will be aggregated into a single subdomain at the coarser level 211 212 Level: intermediate 213 214 Notes: 215 216 .seealso: PCBDDC 217 @*/ 218 PetscErrorCode PCBDDCSetCoarseningRatio(PC pc,PetscInt k) 219 { 220 PetscErrorCode ierr; 221 222 PetscFunctionBegin; 223 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 224 PetscValidLogicalCollectiveInt(pc,k,2); 225 ierr = PetscTryMethod(pc,"PCBDDCSetCoarseningRatio_C",(PC,PetscInt),(pc,k));CHKERRQ(ierr); 226 PetscFunctionReturn(0); 227 } 228 229 /* The following functions (PCBDDCSetUseExactDirichlet PCBDDCSetLevel) are not public */ 230 #undef __FUNCT__ 231 #define __FUNCT__ "PCBDDCSetUseExactDirichlet_BDDC" 232 static PetscErrorCode PCBDDCSetUseExactDirichlet_BDDC(PC pc,PetscBool flg) 233 { 234 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 235 236 PetscFunctionBegin; 237 pcbddc->use_exact_dirichlet_trick = flg; 238 PetscFunctionReturn(0); 239 } 240 241 #undef __FUNCT__ 242 #define __FUNCT__ "PCBDDCSetUseExactDirichlet" 243 PetscErrorCode PCBDDCSetUseExactDirichlet(PC pc,PetscBool flg) 244 { 245 PetscErrorCode ierr; 246 247 PetscFunctionBegin; 248 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 249 PetscValidLogicalCollectiveBool(pc,flg,2); 250 ierr = PetscTryMethod(pc,"PCBDDCSetUseExactDirichlet_C",(PC,PetscBool),(pc,flg));CHKERRQ(ierr); 251 PetscFunctionReturn(0); 252 } 253 254 #undef __FUNCT__ 255 #define __FUNCT__ "PCBDDCSetLevel_BDDC" 256 static PetscErrorCode PCBDDCSetLevel_BDDC(PC pc,PetscInt level) 257 { 258 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 259 260 PetscFunctionBegin; 261 pcbddc->current_level = level; 262 PetscFunctionReturn(0); 263 } 264 265 #undef __FUNCT__ 266 #define __FUNCT__ "PCBDDCSetLevel" 267 PetscErrorCode PCBDDCSetLevel(PC pc,PetscInt level) 268 { 269 PetscErrorCode ierr; 270 271 PetscFunctionBegin; 272 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 273 PetscValidLogicalCollectiveInt(pc,level,2); 274 ierr = PetscTryMethod(pc,"PCBDDCSetLevel_C",(PC,PetscInt),(pc,level));CHKERRQ(ierr); 275 PetscFunctionReturn(0); 276 } 277 278 #undef __FUNCT__ 279 #define __FUNCT__ "PCBDDCSetLevels_BDDC" 280 static PetscErrorCode PCBDDCSetLevels_BDDC(PC pc,PetscInt levels) 281 { 282 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 283 284 PetscFunctionBegin; 285 pcbddc->max_levels = levels; 286 PetscFunctionReturn(0); 287 } 288 289 #undef __FUNCT__ 290 #define __FUNCT__ "PCBDDCSetLevels" 291 /*@ 292 PCBDDCSetLevels - Sets the maximum number of levels for multilevel 293 294 Logically collective on PC 295 296 Input Parameters: 297 + pc - the preconditioning context 298 - levels - the maximum number of levels (max 9) 299 300 Default value is 0, i.e. traditional one-level BDDC 301 302 Level: intermediate 303 304 Notes: 305 306 .seealso: PCBDDC 307 @*/ 308 PetscErrorCode PCBDDCSetLevels(PC pc,PetscInt levels) 309 { 310 PetscErrorCode ierr; 311 312 PetscFunctionBegin; 313 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 314 PetscValidLogicalCollectiveInt(pc,levels,2); 315 if (levels > 99) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Maximum number of levels for bddc is 99\n"); 316 ierr = PetscTryMethod(pc,"PCBDDCSetLevels_C",(PC,PetscInt),(pc,levels));CHKERRQ(ierr); 317 PetscFunctionReturn(0); 318 } 319 /* -------------------------------------------------------------------------- */ 320 321 #undef __FUNCT__ 322 #define __FUNCT__ "PCBDDCSetNullSpace_BDDC" 323 static PetscErrorCode PCBDDCSetNullSpace_BDDC(PC pc,MatNullSpace NullSpace) 324 { 325 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 326 PetscErrorCode ierr; 327 328 PetscFunctionBegin; 329 ierr = PetscObjectReference((PetscObject)NullSpace);CHKERRQ(ierr); 330 ierr = MatNullSpaceDestroy(&pcbddc->NullSpace);CHKERRQ(ierr); 331 pcbddc->NullSpace = NullSpace; 332 PetscFunctionReturn(0); 333 } 334 335 #undef __FUNCT__ 336 #define __FUNCT__ "PCBDDCSetNullSpace" 337 /*@ 338 PCBDDCSetNullSpace - Set nullspace for BDDC operator 339 340 Logically collective on PC and MatNullSpace 341 342 Input Parameters: 343 + pc - the preconditioning context 344 - NullSpace - Null space of the linear operator to be preconditioned (Pmat) 345 346 Level: intermediate 347 348 Notes: 349 350 .seealso: PCBDDC 351 @*/ 352 PetscErrorCode PCBDDCSetNullSpace(PC pc,MatNullSpace NullSpace) 353 { 354 PetscErrorCode ierr; 355 356 PetscFunctionBegin; 357 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 358 PetscValidHeaderSpecific(NullSpace,MAT_NULLSPACE_CLASSID,2); 359 PetscCheckSameComm(pc,1,NullSpace,2); 360 ierr = PetscTryMethod(pc,"PCBDDCSetNullSpace_C",(PC,MatNullSpace),(pc,NullSpace));CHKERRQ(ierr); 361 PetscFunctionReturn(0); 362 } 363 /* -------------------------------------------------------------------------- */ 364 365 #undef __FUNCT__ 366 #define __FUNCT__ "PCBDDCSetDirichletBoundaries_BDDC" 367 static PetscErrorCode PCBDDCSetDirichletBoundaries_BDDC(PC pc,IS DirichletBoundaries) 368 { 369 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 370 PetscErrorCode ierr; 371 372 PetscFunctionBegin; 373 /* last user setting takes precendence -> destroy any other customization */ 374 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 375 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 376 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 377 pcbddc->DirichletBoundaries = DirichletBoundaries; 378 pcbddc->recompute_topography = PETSC_TRUE; 379 PetscFunctionReturn(0); 380 } 381 382 #undef __FUNCT__ 383 #define __FUNCT__ "PCBDDCSetDirichletBoundaries" 384 /*@ 385 PCBDDCSetDirichletBoundaries - Set IS defining Dirichlet boundaries for the global problem. 386 387 Collective 388 389 Input Parameters: 390 + pc - the preconditioning context 391 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries 392 393 Level: intermediate 394 395 Notes: Any process can list any global node 396 397 .seealso: PCBDDC 398 @*/ 399 PetscErrorCode PCBDDCSetDirichletBoundaries(PC pc,IS DirichletBoundaries) 400 { 401 PetscErrorCode ierr; 402 403 PetscFunctionBegin; 404 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 405 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 406 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 407 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundaries_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 408 PetscFunctionReturn(0); 409 } 410 /* -------------------------------------------------------------------------- */ 411 412 #undef __FUNCT__ 413 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal_BDDC" 414 static PetscErrorCode PCBDDCSetDirichletBoundariesLocal_BDDC(PC pc,IS DirichletBoundaries) 415 { 416 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 417 PetscErrorCode ierr; 418 419 PetscFunctionBegin; 420 /* last user setting takes precendence -> destroy any other customization */ 421 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 422 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 423 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 424 pcbddc->DirichletBoundariesLocal = DirichletBoundaries; 425 pcbddc->recompute_topography = PETSC_TRUE; 426 PetscFunctionReturn(0); 427 } 428 429 #undef __FUNCT__ 430 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal" 431 /*@ 432 PCBDDCSetDirichletBoundariesLocal - Set IS defining Dirichlet boundaries for the global problem in local ordering. 433 434 Collective 435 436 Input Parameters: 437 + pc - the preconditioning context 438 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries (in local ordering) 439 440 Level: intermediate 441 442 Notes: 443 444 .seealso: PCBDDC 445 @*/ 446 PetscErrorCode PCBDDCSetDirichletBoundariesLocal(PC pc,IS DirichletBoundaries) 447 { 448 PetscErrorCode ierr; 449 450 PetscFunctionBegin; 451 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 452 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 453 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 454 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundariesLocal_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 455 PetscFunctionReturn(0); 456 } 457 /* -------------------------------------------------------------------------- */ 458 459 #undef __FUNCT__ 460 #define __FUNCT__ "PCBDDCSetNeumannBoundaries_BDDC" 461 static PetscErrorCode PCBDDCSetNeumannBoundaries_BDDC(PC pc,IS NeumannBoundaries) 462 { 463 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 464 PetscErrorCode ierr; 465 466 PetscFunctionBegin; 467 /* last user setting takes precendence -> destroy any other customization */ 468 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 469 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 470 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 471 pcbddc->NeumannBoundaries = NeumannBoundaries; 472 pcbddc->recompute_topography = PETSC_TRUE; 473 PetscFunctionReturn(0); 474 } 475 476 #undef __FUNCT__ 477 #define __FUNCT__ "PCBDDCSetNeumannBoundaries" 478 /*@ 479 PCBDDCSetNeumannBoundaries - Set IS defining Neumann boundaries for the global problem. 480 481 Collective 482 483 Input Parameters: 484 + pc - the preconditioning context 485 - NeumannBoundaries - parallel IS defining the Neumann boundaries 486 487 Level: intermediate 488 489 Notes: Any process can list any global node 490 491 .seealso: PCBDDC 492 @*/ 493 PetscErrorCode PCBDDCSetNeumannBoundaries(PC pc,IS NeumannBoundaries) 494 { 495 PetscErrorCode ierr; 496 497 PetscFunctionBegin; 498 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 499 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 500 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 501 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundaries_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 502 PetscFunctionReturn(0); 503 } 504 /* -------------------------------------------------------------------------- */ 505 506 #undef __FUNCT__ 507 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal_BDDC" 508 static PetscErrorCode PCBDDCSetNeumannBoundariesLocal_BDDC(PC pc,IS NeumannBoundaries) 509 { 510 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 511 PetscErrorCode ierr; 512 513 PetscFunctionBegin; 514 /* last user setting takes precendence -> destroy any other customization */ 515 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 516 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 517 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 518 pcbddc->NeumannBoundariesLocal = NeumannBoundaries; 519 pcbddc->recompute_topography = PETSC_TRUE; 520 PetscFunctionReturn(0); 521 } 522 523 #undef __FUNCT__ 524 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal" 525 /*@ 526 PCBDDCSetNeumannBoundariesLocal - Set IS defining Neumann boundaries for the global problem in local ordering. 527 528 Collective 529 530 Input Parameters: 531 + pc - the preconditioning context 532 - NeumannBoundaries - parallel IS defining the subdomain part of Neumann boundaries (in local ordering) 533 534 Level: intermediate 535 536 Notes: 537 538 .seealso: PCBDDC 539 @*/ 540 PetscErrorCode PCBDDCSetNeumannBoundariesLocal(PC pc,IS NeumannBoundaries) 541 { 542 PetscErrorCode ierr; 543 544 PetscFunctionBegin; 545 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 546 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 547 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 548 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundariesLocal_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 549 PetscFunctionReturn(0); 550 } 551 /* -------------------------------------------------------------------------- */ 552 553 #undef __FUNCT__ 554 #define __FUNCT__ "PCBDDCGetDirichletBoundaries_BDDC" 555 static PetscErrorCode PCBDDCGetDirichletBoundaries_BDDC(PC pc,IS *DirichletBoundaries) 556 { 557 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 558 559 PetscFunctionBegin; 560 *DirichletBoundaries = pcbddc->DirichletBoundaries; 561 PetscFunctionReturn(0); 562 } 563 564 #undef __FUNCT__ 565 #define __FUNCT__ "PCBDDCGetDirichletBoundaries" 566 /*@ 567 PCBDDCGetDirichletBoundaries - Get parallel IS for Dirichlet boundaries 568 569 Collective 570 571 Input Parameters: 572 . pc - the preconditioning context 573 574 Output Parameters: 575 . DirichletBoundaries - index set defining the Dirichlet boundaries 576 577 Level: intermediate 578 579 Notes: The IS returned (if any) is the same passed in earlier by the user with PCBDDCSetDirichletBoundaries 580 581 .seealso: PCBDDC 582 @*/ 583 PetscErrorCode PCBDDCGetDirichletBoundaries(PC pc,IS *DirichletBoundaries) 584 { 585 PetscErrorCode ierr; 586 587 PetscFunctionBegin; 588 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 589 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundaries_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 590 PetscFunctionReturn(0); 591 } 592 /* -------------------------------------------------------------------------- */ 593 594 #undef __FUNCT__ 595 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal_BDDC" 596 static PetscErrorCode PCBDDCGetDirichletBoundariesLocal_BDDC(PC pc,IS *DirichletBoundaries) 597 { 598 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 599 600 PetscFunctionBegin; 601 *DirichletBoundaries = pcbddc->DirichletBoundariesLocal; 602 PetscFunctionReturn(0); 603 } 604 605 #undef __FUNCT__ 606 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal" 607 /*@ 608 PCBDDCGetDirichletBoundariesLocal - Get parallel IS for Dirichlet boundaries (in local ordering) 609 610 Collective 611 612 Input Parameters: 613 . pc - the preconditioning context 614 615 Output Parameters: 616 . DirichletBoundaries - index set defining the subdomain part of Dirichlet boundaries 617 618 Level: intermediate 619 620 Notes: 621 622 .seealso: PCBDDC 623 @*/ 624 PetscErrorCode PCBDDCGetDirichletBoundariesLocal(PC pc,IS *DirichletBoundaries) 625 { 626 PetscErrorCode ierr; 627 628 PetscFunctionBegin; 629 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 630 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundariesLocal_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 631 PetscFunctionReturn(0); 632 } 633 /* -------------------------------------------------------------------------- */ 634 635 #undef __FUNCT__ 636 #define __FUNCT__ "PCBDDCGetNeumannBoundaries_BDDC" 637 static PetscErrorCode PCBDDCGetNeumannBoundaries_BDDC(PC pc,IS *NeumannBoundaries) 638 { 639 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 640 641 PetscFunctionBegin; 642 *NeumannBoundaries = pcbddc->NeumannBoundaries; 643 PetscFunctionReturn(0); 644 } 645 646 #undef __FUNCT__ 647 #define __FUNCT__ "PCBDDCGetNeumannBoundaries" 648 /*@ 649 PCBDDCGetNeumannBoundaries - Get parallel IS for Neumann boundaries 650 651 Collective 652 653 Input Parameters: 654 . pc - the preconditioning context 655 656 Output Parameters: 657 . NeumannBoundaries - index set defining the Neumann boundaries 658 659 Level: intermediate 660 661 Notes: 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: 703 704 .seealso: PCBDDC 705 @*/ 706 PetscErrorCode PCBDDCGetNeumannBoundariesLocal(PC pc,IS *NeumannBoundaries) 707 { 708 PetscErrorCode ierr; 709 710 PetscFunctionBegin; 711 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 712 ierr = PetscUseMethod(pc,"PCBDDCGetNeumannBoundariesLocal_C",(PC,IS*),(pc,NeumannBoundaries));CHKERRQ(ierr); 713 PetscFunctionReturn(0); 714 } 715 /* -------------------------------------------------------------------------- */ 716 717 #undef __FUNCT__ 718 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph_BDDC" 719 static PetscErrorCode PCBDDCSetLocalAdjacencyGraph_BDDC(PC pc, PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 720 { 721 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 722 PCBDDCGraph mat_graph = pcbddc->mat_graph; 723 PetscErrorCode ierr; 724 725 PetscFunctionBegin; 726 /* free old CSR */ 727 ierr = PCBDDCGraphResetCSR(mat_graph);CHKERRQ(ierr); 728 /* TODO: PCBDDCGraphSetAdjacency */ 729 /* get CSR into graph structure */ 730 if (copymode == PETSC_COPY_VALUES) { 731 ierr = PetscMalloc1(nvtxs+1,&mat_graph->xadj);CHKERRQ(ierr); 732 ierr = PetscMalloc1(xadj[nvtxs],&mat_graph->adjncy);CHKERRQ(ierr); 733 ierr = PetscMemcpy(mat_graph->xadj,xadj,(nvtxs+1)*sizeof(PetscInt));CHKERRQ(ierr); 734 ierr = PetscMemcpy(mat_graph->adjncy,adjncy,xadj[nvtxs]*sizeof(PetscInt));CHKERRQ(ierr); 735 } else if (copymode == PETSC_OWN_POINTER) { 736 mat_graph->xadj = (PetscInt*)xadj; 737 mat_graph->adjncy = (PetscInt*)adjncy; 738 } 739 mat_graph->nvtxs_csr = nvtxs; 740 PetscFunctionReturn(0); 741 } 742 743 #undef __FUNCT__ 744 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph" 745 /*@ 746 PCBDDCSetLocalAdjacencyGraph - Set adjacency structure (CSR graph) of the local Neumann matrix 747 748 Not collective 749 750 Input Parameters: 751 + pc - the preconditioning context 752 . nvtxs - number of local vertices of the graph (i.e., the local size of your problem) 753 . xadj, adjncy - the CSR graph 754 - copymode - either PETSC_COPY_VALUES or PETSC_OWN_POINTER. 755 756 Level: intermediate 757 758 Notes: 759 760 .seealso: PCBDDC,PetscCopyMode 761 @*/ 762 PetscErrorCode PCBDDCSetLocalAdjacencyGraph(PC pc,PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 763 { 764 void (*f)(void) = 0; 765 PetscErrorCode ierr; 766 767 PetscFunctionBegin; 768 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 769 PetscValidIntPointer(xadj,3); 770 PetscValidIntPointer(adjncy,4); 771 if (copymode != PETSC_COPY_VALUES && copymode != PETSC_OWN_POINTER) { 772 SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unsupported copy mode %d in %s\n",copymode,__FUNCT__); 773 } 774 ierr = PetscTryMethod(pc,"PCBDDCSetLocalAdjacencyGraph_C",(PC,PetscInt,const PetscInt[],const PetscInt[],PetscCopyMode),(pc,nvtxs,xadj,adjncy,copymode));CHKERRQ(ierr); 775 /* free arrays if PCBDDC is not the PC type */ 776 ierr = PetscObjectQueryFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",&f);CHKERRQ(ierr); 777 if (!f && copymode == PETSC_OWN_POINTER) { 778 ierr = PetscFree(xadj);CHKERRQ(ierr); 779 ierr = PetscFree(adjncy);CHKERRQ(ierr); 780 } 781 PetscFunctionReturn(0); 782 } 783 /* -------------------------------------------------------------------------- */ 784 785 #undef __FUNCT__ 786 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal_BDDC" 787 static PetscErrorCode PCBDDCSetDofsSplittingLocal_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 788 { 789 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 790 PetscInt i; 791 PetscErrorCode ierr; 792 793 PetscFunctionBegin; 794 /* Destroy ISes if they were already set */ 795 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 796 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 797 } 798 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 799 /* last user setting takes precendence -> destroy any other customization */ 800 for (i=0;i<pcbddc->n_ISForDofs;i++) { 801 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 802 } 803 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 804 pcbddc->n_ISForDofs = 0; 805 /* allocate space then set */ 806 if (n_is) { 807 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofsLocal);CHKERRQ(ierr); 808 } 809 for (i=0;i<n_is;i++) { 810 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 811 pcbddc->ISForDofsLocal[i]=ISForDofs[i]; 812 } 813 pcbddc->n_ISForDofsLocal=n_is; 814 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 815 pcbddc->recompute_topography = PETSC_TRUE; 816 PetscFunctionReturn(0); 817 } 818 819 #undef __FUNCT__ 820 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal" 821 /*@ 822 PCBDDCSetDofsSplittingLocal - Set index sets defining fields of the local subdomain matrix 823 824 Collective 825 826 Input Parameters: 827 + pc - the preconditioning context 828 - n_is - number of index sets defining the fields 829 . ISForDofs - array of IS describing the fields in local ordering 830 831 Level: intermediate 832 833 Notes: n_is should be the same among processes. Not all nodes need to be listed: unlisted nodes will belong to a different field. 834 835 .seealso: PCBDDC 836 @*/ 837 PetscErrorCode PCBDDCSetDofsSplittingLocal(PC pc,PetscInt n_is, IS ISForDofs[]) 838 { 839 PetscInt i; 840 PetscErrorCode ierr; 841 842 PetscFunctionBegin; 843 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 844 PetscValidLogicalCollectiveInt(pc,n_is,2); 845 for (i=0;i<n_is;i++) { 846 PetscCheckSameComm(pc,1,ISForDofs[i],3); 847 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 848 } 849 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplittingLocal_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 850 PetscFunctionReturn(0); 851 } 852 /* -------------------------------------------------------------------------- */ 853 854 #undef __FUNCT__ 855 #define __FUNCT__ "PCBDDCSetDofsSplitting_BDDC" 856 static PetscErrorCode PCBDDCSetDofsSplitting_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 857 { 858 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 859 PetscInt i; 860 PetscErrorCode ierr; 861 862 PetscFunctionBegin; 863 /* Destroy ISes if they were already set */ 864 for (i=0;i<pcbddc->n_ISForDofs;i++) { 865 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 866 } 867 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 868 /* last user setting takes precendence -> destroy any other customization */ 869 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 870 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 871 } 872 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 873 pcbddc->n_ISForDofsLocal = 0; 874 /* allocate space then set */ 875 if (n_is) { 876 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofs);CHKERRQ(ierr); 877 } 878 for (i=0;i<n_is;i++) { 879 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 880 pcbddc->ISForDofs[i]=ISForDofs[i]; 881 } 882 pcbddc->n_ISForDofs=n_is; 883 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 884 pcbddc->recompute_topography = PETSC_TRUE; 885 PetscFunctionReturn(0); 886 } 887 888 #undef __FUNCT__ 889 #define __FUNCT__ "PCBDDCSetDofsSplitting" 890 /*@ 891 PCBDDCSetDofsSplitting - Set index sets defining fields of the global matrix 892 893 Collective 894 895 Input Parameters: 896 + pc - the preconditioning context 897 - n_is - number of index sets defining the fields 898 . ISForDofs - array of IS describing the fields in global ordering 899 900 Level: intermediate 901 902 Notes: Any process can list any global node. Not all nodes need to be listed: unlisted nodes will belong to a different field. 903 904 .seealso: PCBDDC 905 @*/ 906 PetscErrorCode PCBDDCSetDofsSplitting(PC pc,PetscInt n_is, IS ISForDofs[]) 907 { 908 PetscInt i; 909 PetscErrorCode ierr; 910 911 PetscFunctionBegin; 912 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 913 PetscValidLogicalCollectiveInt(pc,n_is,2); 914 for (i=0;i<n_is;i++) { 915 PetscCheckSameComm(pc,1,ISForDofs[i],3); 916 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 917 } 918 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplitting_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 919 PetscFunctionReturn(0); 920 } 921 922 /* -------------------------------------------------------------------------- */ 923 #undef __FUNCT__ 924 #define __FUNCT__ "PCPreSolve_BDDC" 925 /* -------------------------------------------------------------------------- */ 926 /* 927 PCPreSolve_BDDC - Changes the right hand side and (if necessary) the initial 928 guess if a transformation of basis approach has been selected. 929 930 Input Parameter: 931 + pc - the preconditioner contex 932 933 Application Interface Routine: PCPreSolve() 934 935 Notes: 936 The interface routine PCPreSolve() is not usually called directly by 937 the user, but instead is called by KSPSolve(). 938 */ 939 static PetscErrorCode PCPreSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 940 { 941 PetscErrorCode ierr; 942 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 943 PC_IS *pcis = (PC_IS*)(pc->data); 944 Vec used_vec; 945 PetscBool copy_rhs = PETSC_TRUE; 946 947 PetscFunctionBegin; 948 /* if we are working with cg, one dirichlet solve can be avoided during Krylov iterations */ 949 if (ksp) { 950 PetscBool iscg; 951 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPCG,&iscg);CHKERRQ(ierr); 952 if (!iscg) { 953 ierr = PCBDDCSetUseExactDirichlet(pc,PETSC_FALSE);CHKERRQ(ierr); 954 } 955 } 956 /* Creates parallel work vectors used in presolve */ 957 if (!pcbddc->original_rhs) { 958 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->original_rhs);CHKERRQ(ierr); 959 } 960 if (!pcbddc->temp_solution) { 961 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->temp_solution);CHKERRQ(ierr); 962 } 963 964 if (x) { 965 ierr = PetscObjectReference((PetscObject)x);CHKERRQ(ierr); 966 used_vec = x; 967 } else { /* it can only happen when calling PCBDDCMatFETIDPGetRHS */ 968 ierr = PetscObjectReference((PetscObject)pcbddc->temp_solution);CHKERRQ(ierr); 969 used_vec = pcbddc->temp_solution; 970 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 971 } 972 973 /* hack into ksp data structure since PCPreSolve comes earlier than setting to zero the guess in src/ksp/ksp/interface/itfunc.c */ 974 if (ksp) { 975 ierr = KSPGetInitialGuessNonzero(ksp,&pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 976 if (!pcbddc->ksp_guess_nonzero) { 977 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 978 } 979 } 980 981 pcbddc->rhs_change = PETSC_FALSE; 982 983 /* Take into account zeroed rows -> change rhs and store solution removed */ 984 if (rhs && pcbddc->DirichletBoundariesLocal) { 985 IS dirIS; 986 Mat_IS *matis = (Mat_IS*)pc->pmat->data; 987 PetscInt dirsize,i,*is_indices; 988 PetscScalar *array_x; 989 const PetscScalar *array_diagonal; 990 991 /* DirichletBoundariesLocal may not be consistent among neighbours */ 992 ierr = PCBDDCGraphGetDirichletDofs(pcbddc->mat_graph,&dirIS);CHKERRQ(ierr); 993 ierr = MatGetDiagonal(pc->pmat,pcis->vec1_global);CHKERRQ(ierr); 994 ierr = VecPointwiseDivide(pcis->vec1_global,rhs,pcis->vec1_global);CHKERRQ(ierr); 995 ierr = VecScatterBegin(matis->ctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 996 ierr = VecScatterEnd(matis->ctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 997 ierr = VecScatterBegin(matis->ctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 998 ierr = VecScatterEnd(matis->ctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 999 ierr = ISGetLocalSize(dirIS,&dirsize);CHKERRQ(ierr); 1000 ierr = VecGetArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1001 ierr = VecGetArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1002 ierr = ISGetIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1003 for (i=0; i<dirsize; i++) array_x[is_indices[i]] = array_diagonal[is_indices[i]]; 1004 ierr = ISRestoreIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1005 ierr = VecRestoreArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1006 ierr = VecRestoreArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1007 ierr = VecScatterBegin(matis->ctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1008 ierr = VecScatterEnd(matis->ctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1009 pcbddc->rhs_change = PETSC_TRUE; 1010 ierr = ISDestroy(&dirIS);CHKERRQ(ierr); 1011 } 1012 1013 /* remove the computed solution or the initial guess from the rhs */ 1014 if (pcbddc->rhs_change || (ksp && pcbddc->ksp_guess_nonzero) ) { 1015 /* store the original rhs */ 1016 if (copy_rhs) { 1017 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1018 copy_rhs = PETSC_FALSE; 1019 } 1020 pcbddc->rhs_change = PETSC_TRUE; 1021 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1022 ierr = MatMultAdd(pc->pmat,used_vec,rhs,rhs);CHKERRQ(ierr); 1023 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1024 ierr = VecCopy(used_vec,pcbddc->temp_solution);CHKERRQ(ierr); 1025 } 1026 ierr = VecDestroy(&used_vec);CHKERRQ(ierr); 1027 1028 /* store partially computed solution and set initial guess */ 1029 if (x) { 1030 ierr = VecSet(x,0.0);CHKERRQ(ierr); 1031 if (pcbddc->use_exact_dirichlet_trick) { 1032 ierr = VecScatterBegin(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1033 ierr = VecScatterEnd(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1034 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1035 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1036 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1037 if (ksp && !pcbddc->ksp_guess_nonzero) { 1038 ierr = KSPSetInitialGuessNonzero(ksp,PETSC_TRUE);CHKERRQ(ierr); 1039 } 1040 } 1041 } 1042 1043 if (pcbddc->ChangeOfBasisMatrix) { 1044 PCBDDCChange_ctx change_ctx; 1045 1046 /* get change ctx */ 1047 ierr = MatShellGetContext(pcbddc->new_global_mat,&change_ctx);CHKERRQ(ierr); 1048 1049 /* set current iteration matrix inside change context (change of basis has been already set into the ctx during PCSetUp) */ 1050 ierr = MatDestroy(&change_ctx->original_mat);CHKERRQ(ierr); 1051 ierr = PetscObjectReference((PetscObject)pc->mat);CHKERRQ(ierr); 1052 change_ctx->original_mat = pc->mat; 1053 1054 /* change iteration matrix */ 1055 ierr = MatDestroy(&pc->mat);CHKERRQ(ierr); 1056 ierr = PetscObjectReference((PetscObject)pcbddc->new_global_mat);CHKERRQ(ierr); 1057 pc->mat = pcbddc->new_global_mat; 1058 1059 /* store the original rhs */ 1060 if (copy_rhs) { 1061 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1062 copy_rhs = PETSC_FALSE; 1063 } 1064 1065 /* change rhs */ 1066 ierr = MatMultTranspose(change_ctx->global_change,rhs,pcis->vec1_global);CHKERRQ(ierr); 1067 ierr = VecCopy(pcis->vec1_global,rhs);CHKERRQ(ierr); 1068 pcbddc->rhs_change = PETSC_TRUE; 1069 } 1070 1071 /* remove nullspace if present */ 1072 if (ksp && x && pcbddc->NullSpace) { 1073 ierr = MatNullSpaceRemove(pcbddc->NullSpace,x);CHKERRQ(ierr); 1074 /* store the original rhs */ 1075 if (copy_rhs) { 1076 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1077 copy_rhs = PETSC_FALSE; 1078 } 1079 pcbddc->rhs_change = PETSC_TRUE; 1080 ierr = MatNullSpaceRemove(pcbddc->NullSpace,rhs);CHKERRQ(ierr); 1081 } 1082 PetscFunctionReturn(0); 1083 } 1084 1085 /* -------------------------------------------------------------------------- */ 1086 #undef __FUNCT__ 1087 #define __FUNCT__ "PCPostSolve_BDDC" 1088 /* -------------------------------------------------------------------------- */ 1089 /* 1090 PCPostSolve_BDDC - Changes the computed solution if a transformation of basis 1091 approach has been selected. Also, restores rhs to its original state. 1092 1093 Input Parameter: 1094 + pc - the preconditioner contex 1095 1096 Application Interface Routine: PCPostSolve() 1097 1098 Notes: 1099 The interface routine PCPostSolve() is not usually called directly by 1100 the user, but instead is called by KSPSolve(). 1101 */ 1102 static PetscErrorCode PCPostSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 1103 { 1104 PetscErrorCode ierr; 1105 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1106 1107 PetscFunctionBegin; 1108 if (pcbddc->ChangeOfBasisMatrix) { 1109 PCBDDCChange_ctx change_ctx; 1110 1111 /* get change ctx */ 1112 ierr = MatShellGetContext(pcbddc->new_global_mat,&change_ctx);CHKERRQ(ierr); 1113 1114 /* restore iteration matrix */ 1115 ierr = MatDestroy(&pc->mat);CHKERRQ(ierr); 1116 ierr = PetscObjectReference((PetscObject)change_ctx->original_mat);CHKERRQ(ierr); 1117 pc->mat = change_ctx->original_mat; 1118 1119 /* get solution in original basis */ 1120 if (x) { 1121 PC_IS *pcis = (PC_IS*)(pc->data); 1122 ierr = MatMult(change_ctx->global_change,x,pcis->vec1_global);CHKERRQ(ierr); 1123 ierr = VecCopy(pcis->vec1_global,x);CHKERRQ(ierr); 1124 } 1125 } 1126 1127 /* add solution removed in presolve */ 1128 if (x && pcbddc->rhs_change) { 1129 ierr = VecAXPY(x,1.0,pcbddc->temp_solution);CHKERRQ(ierr); 1130 } 1131 1132 /* restore rhs to its original state */ 1133 if (rhs && pcbddc->rhs_change) { 1134 ierr = VecCopy(pcbddc->original_rhs,rhs);CHKERRQ(ierr); 1135 } 1136 pcbddc->rhs_change = PETSC_FALSE; 1137 1138 /* restore ksp guess state */ 1139 if (ksp) { 1140 ierr = KSPSetInitialGuessNonzero(ksp,pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 1141 } 1142 PetscFunctionReturn(0); 1143 } 1144 /* -------------------------------------------------------------------------- */ 1145 #undef __FUNCT__ 1146 #define __FUNCT__ "PCSetUp_BDDC" 1147 /* -------------------------------------------------------------------------- */ 1148 /* 1149 PCSetUp_BDDC - Prepares for the use of the BDDC preconditioner 1150 by setting data structures and options. 1151 1152 Input Parameter: 1153 + pc - the preconditioner context 1154 1155 Application Interface Routine: PCSetUp() 1156 1157 Notes: 1158 The interface routine PCSetUp() is not usually called directly by 1159 the user, but instead is called by PCApply() if necessary. 1160 */ 1161 PetscErrorCode PCSetUp_BDDC(PC pc) 1162 { 1163 PetscErrorCode ierr; 1164 PC_BDDC* pcbddc = (PC_BDDC*)pc->data; 1165 Mat_IS* matis; 1166 MatNullSpace nearnullspace; 1167 PetscBool computetopography,computesolvers,computesubschurs; 1168 PetscBool new_nearnullspace_provided,ismatis; 1169 1170 PetscFunctionBegin; 1171 ierr = PetscObjectTypeCompare((PetscObject)pc->pmat,MATIS,&ismatis);CHKERRQ(ierr); 1172 if (!ismatis) { 1173 SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONG,"PCBDDC preconditioner requires matrix of type MATIS"); 1174 } 1175 matis = (Mat_IS*)pc->pmat->data; 1176 /* the following lines of code should be replaced by a better logic between PCIS, PCNN, PCBDDC and other future nonoverlapping preconditioners */ 1177 /* For BDDC we need to define a local "Neumann" problem different to that defined in PCISSetup 1178 Also, BDDC directly build the Dirichlet problem */ 1179 /* split work */ 1180 if (pc->setupcalled) { 1181 if (pc->flag == SAME_NONZERO_PATTERN) { 1182 computetopography = PETSC_FALSE; 1183 computesolvers = PETSC_TRUE; 1184 } else { /* DIFFERENT_NONZERO_PATTERN */ 1185 computetopography = PETSC_TRUE; 1186 computesolvers = PETSC_TRUE; 1187 } 1188 } else { 1189 computetopography = PETSC_TRUE; 1190 computesolvers = PETSC_TRUE; 1191 } 1192 if (pcbddc->recompute_topography) { 1193 computetopography = PETSC_TRUE; 1194 } 1195 pcbddc->adaptive_selection = (PetscBool)(pcbddc->adaptive_threshold > 0.0); 1196 computesubschurs = pcbddc->use_deluxe_scaling || pcbddc->adaptive_selection; 1197 1198 /* Get stdout for dbg */ 1199 if (pcbddc->dbg_flag) { 1200 if (!pcbddc->dbg_viewer) { 1201 pcbddc->dbg_viewer = PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)pc)); 1202 ierr = PetscViewerASCIISynchronizedAllow(pcbddc->dbg_viewer,PETSC_TRUE);CHKERRQ(ierr); 1203 } 1204 ierr = PetscViewerASCIIAddTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1205 } 1206 1207 /*ierr = MatIsSymmetric(pc->pmat,0.,&pcbddc->issym);CHKERRQ(ierr);*/ 1208 { /* this is a temporary workaround since seqbaij matrices does not have support for symmetry checking */ 1209 PetscBool setsym; 1210 ierr = MatIsSymmetricKnown(pc->pmat,&setsym,&pcbddc->issym);CHKERRQ(ierr); 1211 if (!setsym) pcbddc->issym = PETSC_FALSE; 1212 } 1213 1214 if (pcbddc->user_ChangeOfBasisMatrix) { 1215 /* use_change_of_basis flag is used to automatically compute a change of basis from constraints */ 1216 pcbddc->use_change_of_basis = PETSC_FALSE; 1217 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 1218 } else { 1219 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1220 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1221 pcbddc->local_mat = matis->A; 1222 } 1223 1224 /* Set up all the "iterative substructuring" common block without computing solvers */ 1225 { 1226 Mat temp_mat; 1227 1228 temp_mat = matis->A; 1229 matis->A = pcbddc->local_mat; 1230 ierr = PCISSetUp(pc,PETSC_FALSE);CHKERRQ(ierr); 1231 pcbddc->local_mat = matis->A; 1232 matis->A = temp_mat; 1233 } 1234 1235 /* Analyze interface and setup sub_schurs data */ 1236 if (computetopography) { 1237 ierr = PCBDDCAnalyzeInterface(pc);CHKERRQ(ierr); 1238 } 1239 1240 /* Setup local dirichlet solver ksp_D and sub_schurs solvers */ 1241 if (computesolvers) { 1242 ierr = PCBDDCSetUpLocalSolvers(pc,PETSC_TRUE,PETSC_FALSE);CHKERRQ(ierr); 1243 if (computesubschurs) { 1244 if (computetopography) { 1245 ierr = PCBDDCInitSubSchurs(pc);CHKERRQ(ierr); 1246 } 1247 ierr = PCBDDCSetUpSubSchurs(pc);CHKERRQ(ierr); 1248 if (pcbddc->adaptive_selection) { 1249 ierr = PCBDDCAdaptiveSelection(pc);CHKERRQ(ierr); 1250 } 1251 } 1252 } 1253 1254 /* infer if NullSpace object attached to Mat via MatSetNearNullSpace has changed */ 1255 new_nearnullspace_provided = PETSC_FALSE; 1256 ierr = MatGetNearNullSpace(pc->pmat,&nearnullspace);CHKERRQ(ierr); 1257 if (pcbddc->onearnullspace) { /* already used nearnullspace */ 1258 if (!nearnullspace) { /* near null space attached to mat has been destroyed */ 1259 new_nearnullspace_provided = PETSC_TRUE; 1260 } else { 1261 /* determine if the two nullspaces are different (should be lightweight) */ 1262 if (nearnullspace != pcbddc->onearnullspace) { 1263 new_nearnullspace_provided = PETSC_TRUE; 1264 } else { /* maybe the user has changed the content of the nearnullspace so check vectors ObjectStateId */ 1265 PetscInt i; 1266 const Vec *nearnullvecs; 1267 PetscObjectState state; 1268 PetscInt nnsp_size; 1269 ierr = MatNullSpaceGetVecs(nearnullspace,NULL,&nnsp_size,&nearnullvecs);CHKERRQ(ierr); 1270 for (i=0;i<nnsp_size;i++) { 1271 ierr = PetscObjectStateGet((PetscObject)nearnullvecs[i],&state);CHKERRQ(ierr); 1272 if (pcbddc->onearnullvecs_state[i] != state) { 1273 new_nearnullspace_provided = PETSC_TRUE; 1274 break; 1275 } 1276 } 1277 } 1278 } 1279 } else { 1280 if (!nearnullspace) { /* both nearnullspaces are null */ 1281 new_nearnullspace_provided = PETSC_FALSE; 1282 } else { /* nearnullspace attached later */ 1283 new_nearnullspace_provided = PETSC_TRUE; 1284 } 1285 } 1286 #if 0 1287 if (adaptive) { 1288 /* join nullspaces */ 1289 } 1290 /* set null space in BDDC */ 1291 #endif 1292 1293 /* Setup constraints and related work vectors */ 1294 /* reset primal space flags */ 1295 pcbddc->new_primal_space = PETSC_FALSE; 1296 pcbddc->new_primal_space_local = PETSC_FALSE; 1297 if (computetopography || new_nearnullspace_provided) { 1298 /* It also sets the primal space flags */ 1299 ierr = PCBDDCConstraintsSetUp(pc);CHKERRQ(ierr); 1300 /* Allocate needed local vectors (which depends on quantities defined during ConstraintsSetUp) */ 1301 ierr = PCBDDCSetUpLocalWorkVectors(pc);CHKERRQ(ierr); 1302 1303 if (pcbddc->use_change_of_basis) { 1304 PC_IS *pcis = (PC_IS*)(pc->data); 1305 1306 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->ChangeOfBasisMatrix);CHKERRQ(ierr); 1307 /* get submatrices */ 1308 ierr = MatDestroy(&pcis->A_IB);CHKERRQ(ierr); 1309 ierr = MatDestroy(&pcis->A_BI);CHKERRQ(ierr); 1310 ierr = MatDestroy(&pcis->A_BB);CHKERRQ(ierr); 1311 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_BB);CHKERRQ(ierr); 1312 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_I_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_IB);CHKERRQ(ierr); 1313 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_I_local,MAT_INITIAL_MATRIX,&pcis->A_BI);CHKERRQ(ierr); 1314 } else if (!pcbddc->user_ChangeOfBasisMatrix) { 1315 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1316 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1317 pcbddc->local_mat = matis->A; 1318 } 1319 } 1320 1321 if (computesolvers || pcbddc->new_primal_space) { 1322 /* SetUp coarse and local Neumann solvers */ 1323 ierr = PCBDDCSetUpSolvers(pc);CHKERRQ(ierr); 1324 /* SetUp Scaling operator */ 1325 ierr = PCBDDCScalingSetUp(pc);CHKERRQ(ierr); 1326 } 1327 1328 if (pcbddc->dbg_flag) { 1329 ierr = PetscViewerASCIISubtractTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1330 } 1331 PetscFunctionReturn(0); 1332 } 1333 1334 /* -------------------------------------------------------------------------- */ 1335 /* 1336 PCApply_BDDC - Applies the BDDC operator to a vector. 1337 1338 Input Parameters: 1339 . pc - the preconditioner context 1340 . r - input vector (global) 1341 1342 Output Parameter: 1343 . z - output vector (global) 1344 1345 Application Interface Routine: PCApply() 1346 */ 1347 #undef __FUNCT__ 1348 #define __FUNCT__ "PCApply_BDDC" 1349 PetscErrorCode PCApply_BDDC(PC pc,Vec r,Vec z) 1350 { 1351 PC_IS *pcis = (PC_IS*)(pc->data); 1352 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1353 PetscErrorCode ierr; 1354 const PetscScalar one = 1.0; 1355 const PetscScalar m_one = -1.0; 1356 const PetscScalar zero = 0.0; 1357 1358 /* This code is similar to that provided in nn.c for PCNN 1359 NN interface preconditioner changed to BDDC 1360 Added support for M_3 preconditioner in the reference article (code is active if pcbddc->switch_static = PETSC_TRUE) */ 1361 1362 PetscFunctionBegin; 1363 if (!pcbddc->use_exact_dirichlet_trick) { 1364 /* First Dirichlet solve */ 1365 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1366 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1367 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1368 /* 1369 Assembling right hand side for BDDC operator 1370 - pcis->vec1_D for the Dirichlet part (if needed, i.e. prec_flag=PETSC_TRUE) 1371 - pcis->vec1_B the interface part of the global vector z 1372 */ 1373 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1374 ierr = MatMult(pcis->A_BI,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 1375 if (pcbddc->switch_static) { ierr = MatMultAdd(pcis->A_II,pcis->vec2_D,pcis->vec1_D,pcis->vec1_D);CHKERRQ(ierr); } 1376 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1377 ierr = VecCopy(r,z);CHKERRQ(ierr); 1378 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1379 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1380 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 1381 } else { 1382 ierr = VecSet(pcis->vec1_D,zero);CHKERRQ(ierr); 1383 ierr = VecSet(pcis->vec2_D,zero);CHKERRQ(ierr); 1384 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 1385 } 1386 1387 /* Apply interface preconditioner 1388 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 1389 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_FALSE);CHKERRQ(ierr); 1390 1391 /* Apply transpose of partition of unity operator */ 1392 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 1393 1394 /* Second Dirichlet solve and assembling of output */ 1395 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1396 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1397 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 1398 if (pcbddc->switch_static) { ierr = MatMultAdd(pcis->A_II,pcis->vec1_D,pcis->vec3_D,pcis->vec3_D);CHKERRQ(ierr); } 1399 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 1400 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 1401 if (pcbddc->switch_static) { ierr = VecAXPY(pcis->vec4_D,one,pcis->vec1_D);CHKERRQ(ierr); } 1402 ierr = VecAXPY(pcis->vec2_D,one,pcis->vec4_D);CHKERRQ(ierr); 1403 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1404 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1405 PetscFunctionReturn(0); 1406 } 1407 1408 /* -------------------------------------------------------------------------- */ 1409 /* 1410 PCApplyTranspose_BDDC - Applies the transpose of the BDDC operator to a vector. 1411 1412 Input Parameters: 1413 . pc - the preconditioner context 1414 . r - input vector (global) 1415 1416 Output Parameter: 1417 . z - output vector (global) 1418 1419 Application Interface Routine: PCApplyTranspose() 1420 */ 1421 #undef __FUNCT__ 1422 #define __FUNCT__ "PCApplyTranspose_BDDC" 1423 PetscErrorCode PCApplyTranspose_BDDC(PC pc,Vec r,Vec z) 1424 { 1425 PC_IS *pcis = (PC_IS*)(pc->data); 1426 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1427 PetscErrorCode ierr; 1428 const PetscScalar one = 1.0; 1429 const PetscScalar m_one = -1.0; 1430 const PetscScalar zero = 0.0; 1431 1432 PetscFunctionBegin; 1433 if (!pcbddc->use_exact_dirichlet_trick) { 1434 /* First Dirichlet solve */ 1435 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1436 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1437 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1438 /* 1439 Assembling right hand side for BDDC operator 1440 - pcis->vec1_D for the Dirichlet part (if needed, i.e. prec_flag=PETSC_TRUE) 1441 - pcis->vec1_B the interface part of the global vector z 1442 */ 1443 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1444 ierr = MatMultTranspose(pcis->A_IB,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 1445 if (pcbddc->switch_static) { ierr = MatMultTransposeAdd(pcis->A_II,pcis->vec2_D,pcis->vec1_D,pcis->vec1_D);CHKERRQ(ierr); } 1446 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1447 ierr = VecCopy(r,z);CHKERRQ(ierr); 1448 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1449 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1450 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 1451 } else { 1452 ierr = VecSet(pcis->vec1_D,zero);CHKERRQ(ierr); 1453 ierr = VecSet(pcis->vec2_D,zero);CHKERRQ(ierr); 1454 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 1455 } 1456 1457 /* Apply interface preconditioner 1458 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 1459 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_TRUE);CHKERRQ(ierr); 1460 1461 /* Apply transpose of partition of unity operator */ 1462 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 1463 1464 /* Second Dirichlet solve and assembling of output */ 1465 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1466 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1467 ierr = MatMultTranspose(pcis->A_BI,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 1468 if (pcbddc->switch_static) { ierr = MatMultTransposeAdd(pcis->A_II,pcis->vec1_D,pcis->vec3_D,pcis->vec3_D);CHKERRQ(ierr); } 1469 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 1470 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 1471 if (pcbddc->switch_static) { ierr = VecAXPY(pcis->vec4_D,one,pcis->vec1_D);CHKERRQ(ierr); } 1472 ierr = VecAXPY(pcis->vec2_D,one,pcis->vec4_D);CHKERRQ(ierr); 1473 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1474 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1475 PetscFunctionReturn(0); 1476 } 1477 /* -------------------------------------------------------------------------- */ 1478 1479 #undef __FUNCT__ 1480 #define __FUNCT__ "PCDestroy_BDDC" 1481 PetscErrorCode PCDestroy_BDDC(PC pc) 1482 { 1483 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1484 PetscErrorCode ierr; 1485 1486 PetscFunctionBegin; 1487 /* free data created by PCIS */ 1488 ierr = PCISDestroy(pc);CHKERRQ(ierr); 1489 /* free BDDC custom data */ 1490 ierr = PCBDDCResetCustomization(pc);CHKERRQ(ierr); 1491 /* destroy objects related to topography */ 1492 ierr = PCBDDCResetTopography(pc);CHKERRQ(ierr); 1493 /* free allocated graph structure */ 1494 ierr = PetscFree(pcbddc->mat_graph);CHKERRQ(ierr); 1495 /* free allocated sub schurs structure */ 1496 ierr = PetscFree(pcbddc->sub_schurs);CHKERRQ(ierr); 1497 /* destroy objects for scaling operator */ 1498 ierr = PCBDDCScalingDestroy(pc);CHKERRQ(ierr); 1499 ierr = PetscFree(pcbddc->deluxe_ctx);CHKERRQ(ierr); 1500 /* free solvers stuff */ 1501 ierr = PCBDDCResetSolvers(pc);CHKERRQ(ierr); 1502 /* free global vectors needed in presolve */ 1503 ierr = VecDestroy(&pcbddc->temp_solution);CHKERRQ(ierr); 1504 ierr = VecDestroy(&pcbddc->original_rhs);CHKERRQ(ierr); 1505 /* free stuff for change of basis hooks */ 1506 if (pcbddc->new_global_mat) { 1507 PCBDDCChange_ctx change_ctx; 1508 ierr = MatShellGetContext(pcbddc->new_global_mat,&change_ctx);CHKERRQ(ierr); 1509 ierr = MatDestroy(&change_ctx->original_mat);CHKERRQ(ierr); 1510 ierr = MatDestroy(&change_ctx->global_change);CHKERRQ(ierr); 1511 ierr = VecDestroyVecs(2,&change_ctx->work);CHKERRQ(ierr); 1512 ierr = PetscFree(change_ctx);CHKERRQ(ierr); 1513 } 1514 ierr = MatDestroy(&pcbddc->new_global_mat);CHKERRQ(ierr); 1515 /* remove functions */ 1516 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",NULL);CHKERRQ(ierr); 1517 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",NULL);CHKERRQ(ierr); 1518 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",NULL);CHKERRQ(ierr); 1519 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",NULL);CHKERRQ(ierr); 1520 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",NULL);CHKERRQ(ierr); 1521 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",NULL);CHKERRQ(ierr); 1522 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNullSpace_C",NULL);CHKERRQ(ierr); 1523 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 1524 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 1525 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 1526 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 1527 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 1528 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 1529 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 1530 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 1531 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",NULL);CHKERRQ(ierr); 1532 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",NULL);CHKERRQ(ierr); 1533 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",NULL);CHKERRQ(ierr); 1534 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",NULL);CHKERRQ(ierr); 1535 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",NULL);CHKERRQ(ierr); 1536 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",NULL);CHKERRQ(ierr); 1537 /* Free the private data structure */ 1538 ierr = PetscFree(pc->data);CHKERRQ(ierr); 1539 PetscFunctionReturn(0); 1540 } 1541 /* -------------------------------------------------------------------------- */ 1542 1543 #undef __FUNCT__ 1544 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS_BDDC" 1545 static PetscErrorCode PCBDDCMatFETIDPGetRHS_BDDC(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 1546 { 1547 FETIDPMat_ctx mat_ctx; 1548 Vec copy_standard_rhs; 1549 PC_IS* pcis; 1550 PC_BDDC* pcbddc; 1551 PetscErrorCode ierr; 1552 1553 PetscFunctionBegin; 1554 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 1555 pcis = (PC_IS*)mat_ctx->pc->data; 1556 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 1557 1558 /* 1559 change of basis for physical rhs if needed 1560 It also changes the rhs in case of dirichlet boundaries 1561 TODO: better management when FETIDP will have its own class 1562 */ 1563 ierr = VecDuplicate(standard_rhs,©_standard_rhs);CHKERRQ(ierr); 1564 ierr = VecCopy(standard_rhs,copy_standard_rhs);CHKERRQ(ierr); 1565 ierr = PCPreSolve_BDDC(mat_ctx->pc,NULL,copy_standard_rhs,NULL);CHKERRQ(ierr); 1566 /* store vectors for computation of fetidp final solution */ 1567 ierr = VecScatterBegin(pcis->global_to_D,copy_standard_rhs,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1568 ierr = VecScatterEnd(pcis->global_to_D,copy_standard_rhs,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1569 /* scale rhs since it should be unassembled */ 1570 /* TODO use counter scaling? (also below) */ 1571 ierr = VecScatterBegin(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1572 ierr = VecScatterEnd(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1573 /* Apply partition of unity */ 1574 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 1575 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,copy_standard_rhs,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 1576 if (!pcbddc->switch_static) { 1577 /* compute partially subassembled Schur complement right-hand side */ 1578 ierr = KSPSolve(pcbddc->ksp_D,mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 1579 ierr = MatMult(pcis->A_BI,pcis->vec1_D,pcis->vec1_B);CHKERRQ(ierr); 1580 ierr = VecAXPY(mat_ctx->temp_solution_B,-1.0,pcis->vec1_B);CHKERRQ(ierr); 1581 ierr = VecSet(copy_standard_rhs,0.0);CHKERRQ(ierr); 1582 ierr = VecScatterBegin(pcis->global_to_B,mat_ctx->temp_solution_B,copy_standard_rhs,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1583 ierr = VecScatterEnd(pcis->global_to_B,mat_ctx->temp_solution_B,copy_standard_rhs,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1584 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,copy_standard_rhs,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 1585 ierr = VecScatterBegin(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1586 ierr = VecScatterEnd(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1587 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 1588 } 1589 ierr = VecDestroy(©_standard_rhs);CHKERRQ(ierr); 1590 /* BDDC rhs */ 1591 ierr = VecCopy(mat_ctx->temp_solution_B,pcis->vec1_B);CHKERRQ(ierr); 1592 if (pcbddc->switch_static) { 1593 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 1594 } 1595 /* apply BDDC */ 1596 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 1597 /* Application of B_delta and assembling of rhs for fetidp fluxes */ 1598 ierr = VecSet(fetidp_flux_rhs,0.0);CHKERRQ(ierr); 1599 ierr = MatMult(mat_ctx->B_delta,pcis->vec1_B,mat_ctx->lambda_local);CHKERRQ(ierr); 1600 ierr = VecScatterBegin(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1601 ierr = VecScatterEnd(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1602 PetscFunctionReturn(0); 1603 } 1604 1605 #undef __FUNCT__ 1606 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS" 1607 /*@ 1608 PCBDDCMatFETIDPGetRHS - Compute the right-hand side for FETIDP linear system 1609 1610 Collective 1611 1612 Input Parameters: 1613 + fetidp_mat - the FETIDP matrix object obtained by calling PCBDDCCreateFETIDPOperators 1614 . standard_rhs - the right-hand side for your linear system 1615 1616 Output Parameters: 1617 - fetidp_flux_rhs - the right-hand side for the FETIDP linear system 1618 1619 Level: developer 1620 1621 Notes: 1622 1623 .seealso: PCBDDC,PCBDDCCreateFETIDPOperators 1624 @*/ 1625 PetscErrorCode PCBDDCMatFETIDPGetRHS(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 1626 { 1627 FETIDPMat_ctx mat_ctx; 1628 PetscErrorCode ierr; 1629 1630 PetscFunctionBegin; 1631 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 1632 ierr = PetscTryMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetRHS_C",(Mat,Vec,Vec),(fetidp_mat,standard_rhs,fetidp_flux_rhs));CHKERRQ(ierr); 1633 PetscFunctionReturn(0); 1634 } 1635 /* -------------------------------------------------------------------------- */ 1636 1637 #undef __FUNCT__ 1638 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution_BDDC" 1639 static PetscErrorCode PCBDDCMatFETIDPGetSolution_BDDC(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 1640 { 1641 FETIDPMat_ctx mat_ctx; 1642 PC_IS* pcis; 1643 PC_BDDC* pcbddc; 1644 PetscErrorCode ierr; 1645 1646 PetscFunctionBegin; 1647 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 1648 pcis = (PC_IS*)mat_ctx->pc->data; 1649 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 1650 1651 /* apply B_delta^T */ 1652 ierr = VecScatterBegin(mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1653 ierr = VecScatterEnd (mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1654 ierr = MatMultTranspose(mat_ctx->B_delta,mat_ctx->lambda_local,pcis->vec1_B);CHKERRQ(ierr); 1655 /* compute rhs for BDDC application */ 1656 ierr = VecAYPX(pcis->vec1_B,-1.0,mat_ctx->temp_solution_B);CHKERRQ(ierr); 1657 if (pcbddc->switch_static) { 1658 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 1659 } 1660 /* apply BDDC */ 1661 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 1662 /* put values into standard global vector */ 1663 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1664 ierr = VecScatterEnd (pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1665 if (!pcbddc->switch_static) { 1666 /* compute values into the interior if solved for the partially subassembled Schur complement */ 1667 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec1_D);CHKERRQ(ierr); 1668 ierr = VecAXPY(mat_ctx->temp_solution_D,-1.0,pcis->vec1_D);CHKERRQ(ierr); 1669 ierr = KSPSolve(pcbddc->ksp_D,mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 1670 } 1671 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1672 ierr = VecScatterEnd (pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1673 /* final change of basis if needed 1674 Is also sums the dirichlet part removed during RHS assembling */ 1675 ierr = PCPostSolve_BDDC(mat_ctx->pc,NULL,NULL,standard_sol);CHKERRQ(ierr); 1676 PetscFunctionReturn(0); 1677 } 1678 1679 #undef __FUNCT__ 1680 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution" 1681 /*@ 1682 PCBDDCMatFETIDPGetSolution - Compute the physical solution from the solution of the FETIDP linear system 1683 1684 Collective 1685 1686 Input Parameters: 1687 + fetidp_mat - the FETIDP matrix obtained by calling PCBDDCCreateFETIDPOperators 1688 . fetidp_flux_sol - the solution of the FETIDP linear system 1689 1690 Output Parameters: 1691 - standard_sol - the solution defined on the physical domain 1692 1693 Level: developer 1694 1695 Notes: 1696 1697 .seealso: PCBDDC,PCBDDCCreateFETIDPOperators 1698 @*/ 1699 PetscErrorCode PCBDDCMatFETIDPGetSolution(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 1700 { 1701 FETIDPMat_ctx mat_ctx; 1702 PetscErrorCode ierr; 1703 1704 PetscFunctionBegin; 1705 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 1706 ierr = PetscTryMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetSolution_C",(Mat,Vec,Vec),(fetidp_mat,fetidp_flux_sol,standard_sol));CHKERRQ(ierr); 1707 PetscFunctionReturn(0); 1708 } 1709 /* -------------------------------------------------------------------------- */ 1710 1711 extern PetscErrorCode FETIDPMatMult(Mat,Vec,Vec); 1712 extern PetscErrorCode FETIDPMatMultTranspose(Mat,Vec,Vec); 1713 extern PetscErrorCode PCBDDCDestroyFETIDPMat(Mat); 1714 extern PetscErrorCode FETIDPPCApply(PC,Vec,Vec); 1715 extern PetscErrorCode FETIDPPCApplyTranspose(PC,Vec,Vec); 1716 extern PetscErrorCode PCBDDCDestroyFETIDPPC(PC); 1717 1718 #undef __FUNCT__ 1719 #define __FUNCT__ "PCBDDCCreateFETIDPOperators_BDDC" 1720 static PetscErrorCode PCBDDCCreateFETIDPOperators_BDDC(PC pc, Mat *fetidp_mat, PC *fetidp_pc) 1721 { 1722 1723 FETIDPMat_ctx fetidpmat_ctx; 1724 Mat newmat; 1725 FETIDPPC_ctx fetidppc_ctx; 1726 PC newpc; 1727 MPI_Comm comm; 1728 PetscErrorCode ierr; 1729 1730 PetscFunctionBegin; 1731 ierr = PetscObjectGetComm((PetscObject)pc,&comm);CHKERRQ(ierr); 1732 /* FETIDP linear matrix */ 1733 ierr = PCBDDCCreateFETIDPMatContext(pc,&fetidpmat_ctx);CHKERRQ(ierr); 1734 ierr = PCBDDCSetupFETIDPMatContext(fetidpmat_ctx);CHKERRQ(ierr); 1735 ierr = MatCreateShell(comm,PETSC_DECIDE,PETSC_DECIDE,fetidpmat_ctx->n_lambda,fetidpmat_ctx->n_lambda,fetidpmat_ctx,&newmat);CHKERRQ(ierr); 1736 ierr = MatShellSetOperation(newmat,MATOP_MULT,(void (*)(void))FETIDPMatMult);CHKERRQ(ierr); 1737 ierr = MatShellSetOperation(newmat,MATOP_MULT_TRANSPOSE,(void (*)(void))FETIDPMatMultTranspose);CHKERRQ(ierr); 1738 ierr = MatShellSetOperation(newmat,MATOP_DESTROY,(void (*)(void))PCBDDCDestroyFETIDPMat);CHKERRQ(ierr); 1739 ierr = MatSetUp(newmat);CHKERRQ(ierr); 1740 /* FETIDP preconditioner */ 1741 ierr = PCBDDCCreateFETIDPPCContext(pc,&fetidppc_ctx);CHKERRQ(ierr); 1742 ierr = PCBDDCSetupFETIDPPCContext(newmat,fetidppc_ctx);CHKERRQ(ierr); 1743 ierr = PCCreate(comm,&newpc);CHKERRQ(ierr); 1744 ierr = PCSetType(newpc,PCSHELL);CHKERRQ(ierr); 1745 ierr = PCShellSetContext(newpc,fetidppc_ctx);CHKERRQ(ierr); 1746 ierr = PCShellSetApply(newpc,FETIDPPCApply);CHKERRQ(ierr); 1747 ierr = PCShellSetApplyTranspose(newpc,FETIDPPCApplyTranspose);CHKERRQ(ierr); 1748 ierr = PCShellSetDestroy(newpc,PCBDDCDestroyFETIDPPC);CHKERRQ(ierr); 1749 ierr = PCSetOperators(newpc,newmat,newmat);CHKERRQ(ierr); 1750 ierr = PCSetUp(newpc);CHKERRQ(ierr); 1751 /* return pointers for objects created */ 1752 *fetidp_mat=newmat; 1753 *fetidp_pc=newpc; 1754 PetscFunctionReturn(0); 1755 } 1756 1757 #undef __FUNCT__ 1758 #define __FUNCT__ "PCBDDCCreateFETIDPOperators" 1759 /*@ 1760 PCBDDCCreateFETIDPOperators - Create operators for FETIDP 1761 1762 Collective 1763 1764 Input Parameters: 1765 + pc - the BDDC preconditioning context already setup 1766 1767 Output Parameters: 1768 . fetidp_mat - shell FETIDP matrix object 1769 . fetidp_pc - shell Dirichlet preconditioner for FETIDP matrix 1770 1771 Options Database Keys: 1772 - -fetidp_fullyredundant: use or not a fully redundant set of Lagrange multipliers 1773 1774 Level: developer 1775 1776 Notes: 1777 Currently the only operation provided for FETIDP matrix is MatMult 1778 1779 .seealso: PCBDDC 1780 @*/ 1781 PetscErrorCode PCBDDCCreateFETIDPOperators(PC pc, Mat *fetidp_mat, PC *fetidp_pc) 1782 { 1783 PetscErrorCode ierr; 1784 1785 PetscFunctionBegin; 1786 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 1787 if (pc->setupcalled) { 1788 ierr = PetscUseMethod(pc,"PCBDDCCreateFETIDPOperators_C",(PC,Mat*,PC*),(pc,fetidp_mat,fetidp_pc));CHKERRQ(ierr); 1789 } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"You must call PCSetup_BDDC() first \n"); 1790 PetscFunctionReturn(0); 1791 } 1792 /* -------------------------------------------------------------------------- */ 1793 /*MC 1794 PCBDDC - Balancing Domain Decomposition by Constraints. 1795 1796 An implementation of the BDDC preconditioner based on 1797 1798 .vb 1799 [1] C. R. Dohrmann. "An approximate BDDC preconditioner", Numerical Linear Algebra with Applications Volume 14, Issue 2, pages 149-168, March 2007 1800 [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 1801 [3] J. Mandel, B. Sousedik, C. R. Dohrmann. "Multispace and Multilevel BDDC", http://arxiv.org/abs/0712.3977 1802 .ve 1803 1804 The matrix to be preconditioned (Pmat) must be of type MATIS. 1805 1806 Currently works with MATIS matrices with local Neumann matrices of type MATSEQAIJ, MATSEQBAIJ or MATSEQSBAIJ, either with real or complex numbers. 1807 1808 It also works with unsymmetric and indefinite problems. 1809 1810 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. 1811 1812 Approximate local solvers are automatically adapted for singular linear problems (see [1]) if the user has provided the nullspace using PCBDDCSetNullSpace 1813 1814 Boundary nodes are split in vertices, edges and faces 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() 1815 1816 Constraints can be customized by attaching a MatNullSpace object to the MATIS matrix via MatSetNearNullSpace(). 1817 1818 Change of basis is performed similarly to [2] when requested. When more the 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. 1819 1820 The PETSc implementation also supports multilevel BDDC [3]. Coarse grids are partitioned using MatPartitioning object. 1821 1822 Options Database Keys: 1823 1824 . -pc_bddc_use_vertices <1> - use or not vertices in primal space 1825 . -pc_bddc_use_edges <1> - use or not edges in primal space 1826 . -pc_bddc_use_faces <0> - use or not faces in primal space 1827 . -pc_bddc_use_change_of_basis <0> - use change of basis approach (on edges only) 1828 . -pc_bddc_use_change_on_faces <0> - use change of basis approach on faces if change of basis has been requested 1829 . -pc_bddc_switch_static <0> - switches from M_2 to M_3 operator (see reference article [1]) 1830 . -pc_bddc_levels <0> - maximum number of levels for multilevel 1831 . -pc_bddc_coarsening_ratio - H/h ratio at the coarser level 1832 - -pc_bddc_check_level <0> - set verbosity level of debugging output 1833 1834 Options for Dirichlet, Neumann or coarse solver can be set with 1835 .vb 1836 -pc_bddc_dirichlet_ 1837 -pc_bddc_neumann_ 1838 -pc_bddc_coarse_ 1839 .ve 1840 e.g -pc_bddc_dirichlet_ksp_type richardson -pc_bddc_dirichlet_pc_type gamg 1841 1842 When using a multilevel approach, solvers' options at the N-th level can be specified as 1843 .vb 1844 -pc_bddc_dirichlet_lN_ 1845 -pc_bddc_neumann_lN_ 1846 -pc_bddc_coarse_lN_ 1847 .ve 1848 Note that level number ranges from the finest 0 to the coarsest N. 1849 1850 Level: intermediate 1851 1852 Developer notes: 1853 1854 New deluxe scaling operator will be available soon. 1855 1856 Contributed by Stefano Zampini 1857 1858 .seealso: PCCreate(), PCSetType(), PCType (for list of available types), PC, MATIS 1859 M*/ 1860 1861 #undef __FUNCT__ 1862 #define __FUNCT__ "PCCreate_BDDC" 1863 PETSC_EXTERN PetscErrorCode PCCreate_BDDC(PC pc) 1864 { 1865 PetscErrorCode ierr; 1866 PC_BDDC *pcbddc; 1867 1868 PetscFunctionBegin; 1869 /* Creates the private data structure for this preconditioner and attach it to the PC object. */ 1870 ierr = PetscNewLog(pc,&pcbddc);CHKERRQ(ierr); 1871 pc->data = (void*)pcbddc; 1872 1873 /* create PCIS data structure */ 1874 ierr = PCISCreate(pc);CHKERRQ(ierr); 1875 1876 /* BDDC customization */ 1877 pcbddc->use_local_adj = PETSC_TRUE; 1878 pcbddc->use_vertices = PETSC_TRUE; 1879 pcbddc->use_edges = PETSC_TRUE; 1880 pcbddc->use_faces = PETSC_FALSE; 1881 pcbddc->use_change_of_basis = PETSC_FALSE; 1882 pcbddc->use_change_on_faces = PETSC_FALSE; 1883 pcbddc->switch_static = PETSC_FALSE; 1884 pcbddc->use_nnsp_true = PETSC_FALSE; 1885 pcbddc->use_qr_single = PETSC_FALSE; 1886 pcbddc->dbg_flag = 0; 1887 /* private */ 1888 pcbddc->issym = PETSC_FALSE; 1889 pcbddc->local_primal_size = 0; 1890 pcbddc->n_vertices = 0; 1891 pcbddc->n_actual_vertices = 0; 1892 pcbddc->n_constraints = 0; 1893 pcbddc->primal_indices_local_idxs = 0; 1894 pcbddc->recompute_topography = PETSC_FALSE; 1895 pcbddc->coarse_size = -1; 1896 pcbddc->new_primal_space = PETSC_FALSE; 1897 pcbddc->new_primal_space_local = PETSC_FALSE; 1898 pcbddc->global_primal_indices = 0; 1899 pcbddc->onearnullspace = 0; 1900 pcbddc->onearnullvecs_state = 0; 1901 pcbddc->user_primal_vertices = 0; 1902 pcbddc->NullSpace = 0; 1903 pcbddc->temp_solution = 0; 1904 pcbddc->original_rhs = 0; 1905 pcbddc->local_mat = 0; 1906 pcbddc->ChangeOfBasisMatrix = 0; 1907 pcbddc->user_ChangeOfBasisMatrix = 0; 1908 pcbddc->new_global_mat = 0; 1909 pcbddc->coarse_vec = 0; 1910 pcbddc->coarse_rhs = 0; 1911 pcbddc->coarse_ksp = 0; 1912 pcbddc->coarse_phi_B = 0; 1913 pcbddc->coarse_phi_D = 0; 1914 pcbddc->coarse_psi_B = 0; 1915 pcbddc->coarse_psi_D = 0; 1916 pcbddc->vec1_P = 0; 1917 pcbddc->vec1_R = 0; 1918 pcbddc->vec2_R = 0; 1919 pcbddc->local_auxmat1 = 0; 1920 pcbddc->local_auxmat2 = 0; 1921 pcbddc->R_to_B = 0; 1922 pcbddc->R_to_D = 0; 1923 pcbddc->ksp_D = 0; 1924 pcbddc->ksp_R = 0; 1925 pcbddc->NeumannBoundaries = 0; 1926 pcbddc->NeumannBoundariesLocal = 0; 1927 pcbddc->DirichletBoundaries = 0; 1928 pcbddc->DirichletBoundariesLocal = 0; 1929 pcbddc->user_provided_isfordofs = PETSC_FALSE; 1930 pcbddc->n_ISForDofs = 0; 1931 pcbddc->n_ISForDofsLocal = 0; 1932 pcbddc->ISForDofs = 0; 1933 pcbddc->ISForDofsLocal = 0; 1934 pcbddc->ConstraintMatrix = 0; 1935 pcbddc->use_exact_dirichlet_trick = PETSC_TRUE; 1936 pcbddc->coarse_loc_to_glob = 0; 1937 pcbddc->coarsening_ratio = 8; 1938 pcbddc->current_level = 0; 1939 pcbddc->max_levels = 0; 1940 pcbddc->use_coarse_estimates = PETSC_FALSE; 1941 pcbddc->redistribute_coarse = 0; 1942 pcbddc->coarse_subassembling = 0; 1943 pcbddc->coarse_subassembling_init = 0; 1944 1945 /* create local graph structure */ 1946 ierr = PCBDDCGraphCreate(&pcbddc->mat_graph);CHKERRQ(ierr); 1947 1948 /* scaling */ 1949 pcbddc->work_scaling = 0; 1950 pcbddc->use_deluxe_scaling = PETSC_FALSE; 1951 1952 /* create sub schurs structure */ 1953 ierr = PCBDDCSubSchursCreate(&pcbddc->sub_schurs);CHKERRQ(ierr); 1954 pcbddc->sub_schurs_threshold = -1; 1955 pcbddc->sub_schurs_rebuild = PETSC_FALSE; 1956 pcbddc->sub_schurs_layers = -1; 1957 pcbddc->sub_schurs_use_useradj = PETSC_FALSE; 1958 1959 pcbddc->computed_rowadj = PETSC_FALSE; 1960 1961 /* adaptivity */ 1962 pcbddc->adaptive_threshold = -1.0; 1963 pcbddc->adaptive_nmax = 0; 1964 pcbddc->adaptive_nmin = 0; 1965 1966 /* function pointers */ 1967 pc->ops->apply = PCApply_BDDC; 1968 pc->ops->applytranspose = PCApplyTranspose_BDDC; 1969 pc->ops->setup = PCSetUp_BDDC; 1970 pc->ops->destroy = PCDestroy_BDDC; 1971 pc->ops->setfromoptions = PCSetFromOptions_BDDC; 1972 pc->ops->view = 0; 1973 pc->ops->applyrichardson = 0; 1974 pc->ops->applysymmetricleft = 0; 1975 pc->ops->applysymmetricright = 0; 1976 pc->ops->presolve = PCPreSolve_BDDC; 1977 pc->ops->postsolve = PCPostSolve_BDDC; 1978 1979 /* composing function */ 1980 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",PCBDDCSetChangeOfBasisMat_BDDC);CHKERRQ(ierr); 1981 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",PCBDDCSetPrimalVerticesLocalIS_BDDC);CHKERRQ(ierr); 1982 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",PCBDDCSetCoarseningRatio_BDDC);CHKERRQ(ierr); 1983 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",PCBDDCSetLevel_BDDC);CHKERRQ(ierr); 1984 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",PCBDDCSetUseExactDirichlet_BDDC);CHKERRQ(ierr); 1985 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",PCBDDCSetLevels_BDDC);CHKERRQ(ierr); 1986 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNullSpace_C",PCBDDCSetNullSpace_BDDC);CHKERRQ(ierr); 1987 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",PCBDDCSetDirichletBoundaries_BDDC);CHKERRQ(ierr); 1988 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",PCBDDCSetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 1989 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",PCBDDCSetNeumannBoundaries_BDDC);CHKERRQ(ierr); 1990 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",PCBDDCSetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 1991 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",PCBDDCGetDirichletBoundaries_BDDC);CHKERRQ(ierr); 1992 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",PCBDDCGetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 1993 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",PCBDDCGetNeumannBoundaries_BDDC);CHKERRQ(ierr); 1994 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",PCBDDCGetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 1995 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",PCBDDCSetDofsSplitting_BDDC);CHKERRQ(ierr); 1996 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",PCBDDCSetDofsSplittingLocal_BDDC);CHKERRQ(ierr); 1997 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",PCBDDCSetLocalAdjacencyGraph_BDDC);CHKERRQ(ierr); 1998 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",PCBDDCCreateFETIDPOperators_BDDC);CHKERRQ(ierr); 1999 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",PCBDDCMatFETIDPGetRHS_BDDC);CHKERRQ(ierr); 2000 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",PCBDDCMatFETIDPGetSolution_BDDC);CHKERRQ(ierr); 2001 PetscFunctionReturn(0); 2002 } 2003 2004