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 /* temporarily declare it */ 30 PetscErrorCode PCApply_BDDC(PC,Vec,Vec); 31 32 /* -------------------------------------------------------------------------- */ 33 #undef __FUNCT__ 34 #define __FUNCT__ "PCSetFromOptions_BDDC" 35 PetscErrorCode PCSetFromOptions_BDDC(PetscOptionItems *PetscOptionsObject,PC pc) 36 { 37 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 38 PetscErrorCode ierr; 39 40 PetscFunctionBegin; 41 ierr = PetscOptionsHead(PetscOptionsObject,"BDDC options");CHKERRQ(ierr); 42 /* Verbose debugging */ 43 ierr = PetscOptionsInt("-pc_bddc_check_level","Verbose output for PCBDDC (intended for debug)","none",pcbddc->dbg_flag,&pcbddc->dbg_flag,NULL);CHKERRQ(ierr); 44 /* Primal space customization */ 45 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); 46 ierr = PetscOptionsBool("-pc_bddc_use_vertices","Use or not corner dofs in coarse space","none",pcbddc->use_vertices,&pcbddc->use_vertices,NULL);CHKERRQ(ierr); 47 ierr = PetscOptionsBool("-pc_bddc_use_edges","Use or not edge constraints in coarse space","none",pcbddc->use_edges,&pcbddc->use_edges,NULL);CHKERRQ(ierr); 48 ierr = PetscOptionsBool("-pc_bddc_use_faces","Use or not face constraints in coarse space","none",pcbddc->use_faces,&pcbddc->use_faces,NULL);CHKERRQ(ierr); 49 ierr = PetscOptionsInt("-pc_bddc_vertex_size","Connected components smaller or equal to vertex size will be considered as primal vertices","none",pcbddc->vertex_size,&pcbddc->vertex_size,NULL);CHKERRQ(ierr); 50 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); 51 ierr = PetscOptionsBool("-pc_bddc_use_qr_single","Use QR factorization for single constraints on cc (QR is always used when multiple constraints are present)","none",pcbddc->use_qr_single,&pcbddc->use_qr_single,NULL);CHKERRQ(ierr); 52 /* Change of basis */ 53 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); 54 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); 55 if (!pcbddc->use_change_of_basis) { 56 pcbddc->use_change_on_faces = PETSC_FALSE; 57 } 58 /* Switch between M_2 (default) and M_3 preconditioners (as defined by C. Dohrmann in the ref. article) */ 59 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); 60 ierr = PetscOptionsInt("-pc_bddc_coarse_redistribute","Number of procs where to redistribute coarse problem","none",pcbddc->redistribute_coarse,&pcbddc->redistribute_coarse,NULL);CHKERRQ(ierr); 61 ierr = PetscOptionsInt("-pc_bddc_coarsening_ratio","Set coarsening ratio used in multilevel coarsening","none",pcbddc->coarsening_ratio,&pcbddc->coarsening_ratio,NULL);CHKERRQ(ierr); 62 ierr = PetscOptionsInt("-pc_bddc_levels","Set maximum number of levels for multilevel","none",pcbddc->max_levels,&pcbddc->max_levels,NULL);CHKERRQ(ierr); 63 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); 64 ierr = PetscOptionsBool("-pc_bddc_use_deluxe_scaling","Use deluxe scaling for BDDC","none",pcbddc->use_deluxe_scaling,&pcbddc->use_deluxe_scaling,NULL);CHKERRQ(ierr); 65 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); 66 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); 67 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); 68 ierr = PetscOptionsBool("-pc_bddc_schur_exact","Whether or not to use the exact Schur complement instead of the reduced one (which excludes size 1 cc)","none",pcbddc->sub_schurs_exact_schur,&pcbddc->sub_schurs_exact_schur,NULL);CHKERRQ(ierr); 69 ierr = PetscOptionsBool("-pc_bddc_deluxe_zerorows","Zero rows and columns of deluxe operators associated with primal dofs","none",pcbddc->deluxe_zerorows,&pcbddc->deluxe_zerorows,NULL);CHKERRQ(ierr); 70 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); 71 ierr = PetscOptionsBool("-pc_bddc_adaptive_userdefined","Use user-defined constraints (should be attached via MatSetNearNullSpace to pmat) in addition to those adaptively generated","none",pcbddc->adaptive_userdefined,&pcbddc->adaptive_userdefined,NULL);CHKERRQ(ierr); 72 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); 73 ierr = PetscOptionsInt("-pc_bddc_adaptive_nmin","Minimum number of constraints per connected components","none",pcbddc->adaptive_nmin,&pcbddc->adaptive_nmin,NULL);CHKERRQ(ierr); 74 ierr = PetscOptionsInt("-pc_bddc_adaptive_nmax","Maximum number of constraints per connected components","none",pcbddc->adaptive_nmax,&pcbddc->adaptive_nmax,NULL);CHKERRQ(ierr); 75 ierr = PetscOptionsBool("-pc_bddc_symmetric","Symmetric computation of primal basis functions","none",pcbddc->symmetric_primal,&pcbddc->symmetric_primal,NULL);CHKERRQ(ierr); 76 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); 77 ierr = PetscOptionsBool("-pc_bddc_benign_trick","Apply the benign subspace trick to saddle point problems with discontinuous pressures","none",pcbddc->benign_saddle_point,&pcbddc->benign_saddle_point,NULL);CHKERRQ(ierr); 78 ierr = PetscOptionsBool("-pc_bddc_benign_nonetflux","Automatic computation of no-net-flux quadrature weights","none",pcbddc->benign_compute_nonetflux,&pcbddc->benign_compute_nonetflux,NULL);CHKERRQ(ierr); 79 ierr = PetscOptionsBool("-pc_bddc_detect_disconnected","Detects disconnected subdomains","none",pcbddc->detect_disconnected,&pcbddc->detect_disconnected,NULL);CHKERRQ(ierr); 80 ierr = PetscOptionsTail();CHKERRQ(ierr); 81 PetscFunctionReturn(0); 82 } 83 84 /* -------------------------------------------------------------------------- */ 85 #undef __FUNCT__ 86 #define __FUNCT__ "PCView_BDDC" 87 static PetscErrorCode PCView_BDDC(PC pc,PetscViewer viewer) 88 { 89 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 90 PetscErrorCode ierr; 91 PetscBool isascii,isstring; 92 93 PetscFunctionBegin; 94 ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&isascii);CHKERRQ(ierr); 95 ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERSTRING,&isstring);CHKERRQ(ierr); 96 97 /* In a braindead way, print out anything which the user can control from the command line, 98 cribbing from PCSetFromOptions_BDDC */ 99 100 /* Nothing printed for the String viewer */ 101 102 /* ASCII viewer */ 103 if (isascii) { 104 /* Verbose debugging */ 105 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use verbose output: %d\n",pcbddc->dbg_flag);CHKERRQ(ierr); 106 107 /* Primal space customization */ 108 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use local mat graph: %d\n",pcbddc->use_local_adj);CHKERRQ(ierr); 109 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use vertices: %d\n",pcbddc->use_vertices);CHKERRQ(ierr); 110 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use edges: %d\n",pcbddc->use_edges);CHKERRQ(ierr); 111 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use faces: %d\n",pcbddc->use_faces);CHKERRQ(ierr); 112 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use true near null space: %d\n",pcbddc->use_nnsp_true);CHKERRQ(ierr); 113 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use QR for single constraints on cc: %d\n",pcbddc->use_qr_single);CHKERRQ(ierr); 114 115 /* Change of basis */ 116 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use change of basis on local edge nodes: %d\n",pcbddc->use_change_of_basis);CHKERRQ(ierr); 117 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use change of basis on local face nodes: %d\n",pcbddc->use_change_on_faces);CHKERRQ(ierr); 118 119 /* Switch between M_2 (default) and M_3 preconditioners (as defined by C. Dohrmann in the ref. article) */ 120 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Switch on static condensation ops around the interface preconditioner: %d\n",pcbddc->switch_static);CHKERRQ(ierr); 121 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Coarse problem restribute procs: %d\n",pcbddc->redistribute_coarse);CHKERRQ(ierr); 122 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Multilevel coarsening ratio: %d\n",pcbddc->coarsening_ratio);CHKERRQ(ierr); 123 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Multilevel max levels: %d\n",pcbddc->max_levels);CHKERRQ(ierr); 124 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use estimated eigs for coarse problem: %d\n",pcbddc->use_coarse_estimates);CHKERRQ(ierr); 125 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use deluxe scaling: %d\n",pcbddc->use_deluxe_scaling);CHKERRQ(ierr); 126 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Rebuild interface graph for Schur principal minors: %d\n",pcbddc->sub_schurs_rebuild);CHKERRQ(ierr); 127 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Number of dofs' layers for the computation of principal minors: %d\n",pcbddc->sub_schurs_layers);CHKERRQ(ierr); 128 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Use user CSR graph to compute successive layers: %d\n",pcbddc->sub_schurs_use_useradj);CHKERRQ(ierr); 129 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Fast deluxe scaling: %d\n",pcbddc->faster_deluxe);CHKERRQ(ierr); 130 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Adaptive constraint selection threshold: %g\n",pcbddc->adaptive_threshold);CHKERRQ(ierr); 131 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Min constraints / connected component: %d\n",pcbddc->adaptive_nmin);CHKERRQ(ierr); 132 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Max constraints / connected component: %d\n",pcbddc->adaptive_nmax);CHKERRQ(ierr); 133 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Symmetric computation of primal basis functions: %d\n",pcbddc->symmetric_primal);CHKERRQ(ierr); 134 ierr = PetscViewerASCIIPrintf(viewer, " BDDC: Num. Procs. to map coarse adjacency list: %d\n",pcbddc->coarse_adj_red);CHKERRQ(ierr); 135 } 136 137 PetscFunctionReturn(0); 138 } 139 140 /* -------------------------------------------------------------------------- */ 141 #undef __FUNCT__ 142 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat_BDDC" 143 static PetscErrorCode PCBDDCSetChangeOfBasisMat_BDDC(PC pc, Mat change, PetscBool interior) 144 { 145 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 146 PetscErrorCode ierr; 147 148 PetscFunctionBegin; 149 ierr = PetscObjectReference((PetscObject)change);CHKERRQ(ierr); 150 ierr = MatDestroy(&pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 151 pcbddc->user_ChangeOfBasisMatrix = change; 152 pcbddc->change_interior = interior; 153 PetscFunctionReturn(0); 154 } 155 #undef __FUNCT__ 156 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat" 157 /*@ 158 PCBDDCSetChangeOfBasisMat - Set user defined change of basis for dofs 159 160 Collective on PC 161 162 Input Parameters: 163 + pc - the preconditioning context 164 . change - the change of basis matrix 165 - interior - whether or not the change of basis modifies interior dofs 166 167 Level: intermediate 168 169 Notes: 170 171 .seealso: PCBDDC 172 @*/ 173 PetscErrorCode PCBDDCSetChangeOfBasisMat(PC pc, Mat change, PetscBool interior) 174 { 175 PetscErrorCode ierr; 176 177 PetscFunctionBegin; 178 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 179 PetscValidHeaderSpecific(change,MAT_CLASSID,2); 180 PetscCheckSameComm(pc,1,change,2); 181 if (pc->mat) { 182 PetscInt rows_c,cols_c,rows,cols; 183 ierr = MatGetSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 184 ierr = MatGetSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 185 if (rows_c != rows) SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of rows for change of basis matrix! %d != %d",rows_c,rows); 186 if (cols_c != cols) SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of columns for change of basis matrix! %d != %d",cols_c,cols); 187 ierr = MatGetLocalSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 188 ierr = MatGetLocalSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 189 if (rows_c != rows) SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of local rows for change of basis matrix! %d != %d",rows_c,rows); 190 if (cols_c != cols) SETERRQ2(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Invalid number of local columns for change of basis matrix! %d != %d",cols_c,cols); 191 } 192 ierr = PetscTryMethod(pc,"PCBDDCSetChangeOfBasisMat_C",(PC,Mat,PetscBool),(pc,change,interior));CHKERRQ(ierr); 193 PetscFunctionReturn(0); 194 } 195 /* -------------------------------------------------------------------------- */ 196 #undef __FUNCT__ 197 #define __FUNCT__ "PCBDDCSetPrimalVerticesIS_BDDC" 198 static PetscErrorCode PCBDDCSetPrimalVerticesIS_BDDC(PC pc, IS PrimalVertices) 199 { 200 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 201 PetscBool isequal = PETSC_FALSE; 202 PetscErrorCode ierr; 203 204 PetscFunctionBegin; 205 ierr = PetscObjectReference((PetscObject)PrimalVertices);CHKERRQ(ierr); 206 if (pcbddc->user_primal_vertices) { 207 ierr = ISEqual(PrimalVertices,pcbddc->user_primal_vertices,&isequal);CHKERRQ(ierr); 208 } 209 ierr = ISDestroy(&pcbddc->user_primal_vertices);CHKERRQ(ierr); 210 ierr = ISDestroy(&pcbddc->user_primal_vertices_local);CHKERRQ(ierr); 211 pcbddc->user_primal_vertices = PrimalVertices; 212 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 213 PetscFunctionReturn(0); 214 } 215 #undef __FUNCT__ 216 #define __FUNCT__ "PCBDDCSetPrimalVerticesIS" 217 /*@ 218 PCBDDCSetPrimalVerticesIS - Set additional user defined primal vertices in PCBDDC 219 220 Collective 221 222 Input Parameters: 223 + pc - the preconditioning context 224 - PrimalVertices - index set of primal vertices in global numbering (can be empty) 225 226 Level: intermediate 227 228 Notes: 229 Any process can list any global node 230 231 .seealso: PCBDDC 232 @*/ 233 PetscErrorCode PCBDDCSetPrimalVerticesIS(PC pc, IS PrimalVertices) 234 { 235 PetscErrorCode ierr; 236 237 PetscFunctionBegin; 238 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 239 PetscValidHeaderSpecific(PrimalVertices,IS_CLASSID,2); 240 PetscCheckSameComm(pc,1,PrimalVertices,2); 241 ierr = PetscTryMethod(pc,"PCBDDCSetPrimalVerticesIS_C",(PC,IS),(pc,PrimalVertices));CHKERRQ(ierr); 242 PetscFunctionReturn(0); 243 } 244 /* -------------------------------------------------------------------------- */ 245 #undef __FUNCT__ 246 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS_BDDC" 247 static PetscErrorCode PCBDDCSetPrimalVerticesLocalIS_BDDC(PC pc, IS PrimalVertices) 248 { 249 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 250 PetscBool isequal = PETSC_FALSE; 251 PetscErrorCode ierr; 252 253 PetscFunctionBegin; 254 ierr = PetscObjectReference((PetscObject)PrimalVertices);CHKERRQ(ierr); 255 if (pcbddc->user_primal_vertices_local) { 256 ierr = ISEqual(PrimalVertices,pcbddc->user_primal_vertices_local,&isequal);CHKERRQ(ierr); 257 } 258 ierr = ISDestroy(&pcbddc->user_primal_vertices);CHKERRQ(ierr); 259 ierr = ISDestroy(&pcbddc->user_primal_vertices_local);CHKERRQ(ierr); 260 pcbddc->user_primal_vertices_local = PrimalVertices; 261 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 262 PetscFunctionReturn(0); 263 } 264 #undef __FUNCT__ 265 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS" 266 /*@ 267 PCBDDCSetPrimalVerticesLocalIS - Set additional user defined primal vertices in PCBDDC 268 269 Collective 270 271 Input Parameters: 272 + pc - the preconditioning context 273 - PrimalVertices - index set of primal vertices in local numbering (can be empty) 274 275 Level: intermediate 276 277 Notes: 278 279 .seealso: PCBDDC 280 @*/ 281 PetscErrorCode PCBDDCSetPrimalVerticesLocalIS(PC pc, IS PrimalVertices) 282 { 283 PetscErrorCode ierr; 284 285 PetscFunctionBegin; 286 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 287 PetscValidHeaderSpecific(PrimalVertices,IS_CLASSID,2); 288 PetscCheckSameComm(pc,1,PrimalVertices,2); 289 ierr = PetscTryMethod(pc,"PCBDDCSetPrimalVerticesLocalIS_C",(PC,IS),(pc,PrimalVertices));CHKERRQ(ierr); 290 PetscFunctionReturn(0); 291 } 292 /* -------------------------------------------------------------------------- */ 293 #undef __FUNCT__ 294 #define __FUNCT__ "PCBDDCSetCoarseningRatio_BDDC" 295 static PetscErrorCode PCBDDCSetCoarseningRatio_BDDC(PC pc,PetscInt k) 296 { 297 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 298 299 PetscFunctionBegin; 300 pcbddc->coarsening_ratio = k; 301 PetscFunctionReturn(0); 302 } 303 304 #undef __FUNCT__ 305 #define __FUNCT__ "PCBDDCSetCoarseningRatio" 306 /*@ 307 PCBDDCSetCoarseningRatio - Set coarsening ratio used in multilevel 308 309 Logically collective on PC 310 311 Input Parameters: 312 + pc - the preconditioning context 313 - k - coarsening ratio (H/h at the coarser level) 314 315 Options Database Keys: 316 . -pc_bddc_coarsening_ratio 317 318 Level: intermediate 319 320 Notes: 321 Approximatively k subdomains at the finer level will be aggregated into a single subdomain at the coarser level 322 323 .seealso: PCBDDC, PCBDDCSetLevels() 324 @*/ 325 PetscErrorCode PCBDDCSetCoarseningRatio(PC pc,PetscInt k) 326 { 327 PetscErrorCode ierr; 328 329 PetscFunctionBegin; 330 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 331 PetscValidLogicalCollectiveInt(pc,k,2); 332 ierr = PetscTryMethod(pc,"PCBDDCSetCoarseningRatio_C",(PC,PetscInt),(pc,k));CHKERRQ(ierr); 333 PetscFunctionReturn(0); 334 } 335 336 /* The following functions (PCBDDCSetUseExactDirichlet PCBDDCSetLevel) are not public */ 337 #undef __FUNCT__ 338 #define __FUNCT__ "PCBDDCSetUseExactDirichlet_BDDC" 339 static PetscErrorCode PCBDDCSetUseExactDirichlet_BDDC(PC pc,PetscBool flg) 340 { 341 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 342 343 PetscFunctionBegin; 344 pcbddc->use_exact_dirichlet_trick = flg; 345 PetscFunctionReturn(0); 346 } 347 348 #undef __FUNCT__ 349 #define __FUNCT__ "PCBDDCSetUseExactDirichlet" 350 PetscErrorCode PCBDDCSetUseExactDirichlet(PC pc,PetscBool flg) 351 { 352 PetscErrorCode ierr; 353 354 PetscFunctionBegin; 355 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 356 PetscValidLogicalCollectiveBool(pc,flg,2); 357 ierr = PetscTryMethod(pc,"PCBDDCSetUseExactDirichlet_C",(PC,PetscBool),(pc,flg));CHKERRQ(ierr); 358 PetscFunctionReturn(0); 359 } 360 361 #undef __FUNCT__ 362 #define __FUNCT__ "PCBDDCSetLevel_BDDC" 363 static PetscErrorCode PCBDDCSetLevel_BDDC(PC pc,PetscInt level) 364 { 365 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 366 367 PetscFunctionBegin; 368 pcbddc->current_level = level; 369 PetscFunctionReturn(0); 370 } 371 372 #undef __FUNCT__ 373 #define __FUNCT__ "PCBDDCSetLevel" 374 PetscErrorCode PCBDDCSetLevel(PC pc,PetscInt level) 375 { 376 PetscErrorCode ierr; 377 378 PetscFunctionBegin; 379 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 380 PetscValidLogicalCollectiveInt(pc,level,2); 381 ierr = PetscTryMethod(pc,"PCBDDCSetLevel_C",(PC,PetscInt),(pc,level));CHKERRQ(ierr); 382 PetscFunctionReturn(0); 383 } 384 385 #undef __FUNCT__ 386 #define __FUNCT__ "PCBDDCSetLevels_BDDC" 387 static PetscErrorCode PCBDDCSetLevels_BDDC(PC pc,PetscInt levels) 388 { 389 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 390 391 PetscFunctionBegin; 392 pcbddc->max_levels = levels; 393 PetscFunctionReturn(0); 394 } 395 396 #undef __FUNCT__ 397 #define __FUNCT__ "PCBDDCSetLevels" 398 /*@ 399 PCBDDCSetLevels - Sets the maximum number of levels for multilevel 400 401 Logically collective on PC 402 403 Input Parameters: 404 + pc - the preconditioning context 405 - levels - the maximum number of levels (max 9) 406 407 Options Database Keys: 408 . -pc_bddc_levels 409 410 Level: intermediate 411 412 Notes: 413 Default value is 0, i.e. traditional one-level BDDC 414 415 .seealso: PCBDDC, PCBDDCSetCoarseningRatio() 416 @*/ 417 PetscErrorCode PCBDDCSetLevels(PC pc,PetscInt levels) 418 { 419 PetscErrorCode ierr; 420 421 PetscFunctionBegin; 422 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 423 PetscValidLogicalCollectiveInt(pc,levels,2); 424 if (levels > 99) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Maximum number of levels for bddc is 99\n"); 425 ierr = PetscTryMethod(pc,"PCBDDCSetLevels_C",(PC,PetscInt),(pc,levels));CHKERRQ(ierr); 426 PetscFunctionReturn(0); 427 } 428 /* -------------------------------------------------------------------------- */ 429 430 #undef __FUNCT__ 431 #define __FUNCT__ "PCBDDCSetNullSpace_BDDC" 432 static PetscErrorCode PCBDDCSetNullSpace_BDDC(PC pc,MatNullSpace NullSpace) 433 { 434 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 435 PetscErrorCode ierr; 436 437 PetscFunctionBegin; 438 ierr = PetscObjectReference((PetscObject)NullSpace);CHKERRQ(ierr); 439 ierr = MatNullSpaceDestroy(&pcbddc->NullSpace);CHKERRQ(ierr); 440 pcbddc->NullSpace = NullSpace; 441 PetscFunctionReturn(0); 442 } 443 444 #undef __FUNCT__ 445 #define __FUNCT__ "PCBDDCSetNullSpace" 446 /*@ 447 PCBDDCSetNullSpace - Set nullspace for BDDC operator 448 449 Logically collective on PC and MatNullSpace 450 451 Input Parameters: 452 + pc - the preconditioning context 453 - NullSpace - Null space of the linear operator to be preconditioned (Pmat) 454 455 Level: intermediate 456 457 Notes: 458 459 .seealso: PCBDDC 460 @*/ 461 PetscErrorCode PCBDDCSetNullSpace(PC pc,MatNullSpace NullSpace) 462 { 463 PetscErrorCode ierr; 464 465 PetscFunctionBegin; 466 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 467 PetscValidHeaderSpecific(NullSpace,MAT_NULLSPACE_CLASSID,2); 468 PetscCheckSameComm(pc,1,NullSpace,2); 469 ierr = PetscTryMethod(pc,"PCBDDCSetNullSpace_C",(PC,MatNullSpace),(pc,NullSpace));CHKERRQ(ierr); 470 PetscFunctionReturn(0); 471 } 472 /* -------------------------------------------------------------------------- */ 473 474 #undef __FUNCT__ 475 #define __FUNCT__ "PCBDDCSetDirichletBoundaries_BDDC" 476 static PetscErrorCode PCBDDCSetDirichletBoundaries_BDDC(PC pc,IS DirichletBoundaries) 477 { 478 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 479 PetscBool isequal = PETSC_FALSE; 480 PetscErrorCode ierr; 481 482 PetscFunctionBegin; 483 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 484 if (pcbddc->DirichletBoundaries) { 485 ierr = ISEqual(DirichletBoundaries,pcbddc->DirichletBoundaries,&isequal);CHKERRQ(ierr); 486 } 487 /* last user setting takes precendence -> destroy any other customization */ 488 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 489 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 490 pcbddc->DirichletBoundaries = DirichletBoundaries; 491 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 492 PetscFunctionReturn(0); 493 } 494 495 #undef __FUNCT__ 496 #define __FUNCT__ "PCBDDCSetDirichletBoundaries" 497 /*@ 498 PCBDDCSetDirichletBoundaries - Set IS defining Dirichlet boundaries for the global problem. 499 500 Collective 501 502 Input Parameters: 503 + pc - the preconditioning context 504 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries 505 506 Level: intermediate 507 508 Notes: 509 Provide the information if you used MatZeroRows/Columns routines. Any process can list any global node 510 511 .seealso: PCBDDC, PCBDDCSetDirichletBoundariesLocal(), MatZeroRows(), MatZeroRowsColumns() 512 @*/ 513 PetscErrorCode PCBDDCSetDirichletBoundaries(PC pc,IS DirichletBoundaries) 514 { 515 PetscErrorCode ierr; 516 517 PetscFunctionBegin; 518 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 519 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 520 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 521 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundaries_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 522 PetscFunctionReturn(0); 523 } 524 /* -------------------------------------------------------------------------- */ 525 526 #undef __FUNCT__ 527 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal_BDDC" 528 static PetscErrorCode PCBDDCSetDirichletBoundariesLocal_BDDC(PC pc,IS DirichletBoundaries) 529 { 530 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 531 PetscBool isequal = PETSC_FALSE; 532 PetscErrorCode ierr; 533 534 PetscFunctionBegin; 535 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 536 if (pcbddc->DirichletBoundariesLocal) { 537 ierr = ISEqual(DirichletBoundaries,pcbddc->DirichletBoundariesLocal,&isequal);CHKERRQ(ierr); 538 } 539 /* last user setting takes precendence -> destroy any other customization */ 540 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 541 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 542 pcbddc->DirichletBoundariesLocal = DirichletBoundaries; 543 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 544 PetscFunctionReturn(0); 545 } 546 547 #undef __FUNCT__ 548 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal" 549 /*@ 550 PCBDDCSetDirichletBoundariesLocal - Set IS defining Dirichlet boundaries for the global problem in local ordering. 551 552 Collective 553 554 Input Parameters: 555 + pc - the preconditioning context 556 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries (in local ordering) 557 558 Level: intermediate 559 560 Notes: 561 562 .seealso: PCBDDC, PCBDDCSetDirichletBoundaries(), MatZeroRows(), MatZeroRowsColumns() 563 @*/ 564 PetscErrorCode PCBDDCSetDirichletBoundariesLocal(PC pc,IS DirichletBoundaries) 565 { 566 PetscErrorCode ierr; 567 568 PetscFunctionBegin; 569 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 570 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 571 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 572 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundariesLocal_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 573 PetscFunctionReturn(0); 574 } 575 /* -------------------------------------------------------------------------- */ 576 577 #undef __FUNCT__ 578 #define __FUNCT__ "PCBDDCSetNeumannBoundaries_BDDC" 579 static PetscErrorCode PCBDDCSetNeumannBoundaries_BDDC(PC pc,IS NeumannBoundaries) 580 { 581 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 582 PetscBool isequal = PETSC_FALSE; 583 PetscErrorCode ierr; 584 585 PetscFunctionBegin; 586 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 587 if (pcbddc->NeumannBoundaries) { 588 ierr = ISEqual(NeumannBoundaries,pcbddc->NeumannBoundaries,&isequal);CHKERRQ(ierr); 589 } 590 /* last user setting takes precendence -> destroy any other customization */ 591 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 592 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 593 pcbddc->NeumannBoundaries = NeumannBoundaries; 594 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 595 PetscFunctionReturn(0); 596 } 597 598 #undef __FUNCT__ 599 #define __FUNCT__ "PCBDDCSetNeumannBoundaries" 600 /*@ 601 PCBDDCSetNeumannBoundaries - Set IS defining Neumann boundaries for the global problem. 602 603 Collective 604 605 Input Parameters: 606 + pc - the preconditioning context 607 - NeumannBoundaries - parallel IS defining the Neumann boundaries 608 609 Level: intermediate 610 611 Notes: 612 Any process can list any global node 613 614 .seealso: PCBDDC, PCBDDCSetNeumannBoundariesLocal() 615 @*/ 616 PetscErrorCode PCBDDCSetNeumannBoundaries(PC pc,IS NeumannBoundaries) 617 { 618 PetscErrorCode ierr; 619 620 PetscFunctionBegin; 621 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 622 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 623 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 624 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundaries_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 625 PetscFunctionReturn(0); 626 } 627 /* -------------------------------------------------------------------------- */ 628 629 #undef __FUNCT__ 630 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal_BDDC" 631 static PetscErrorCode PCBDDCSetNeumannBoundariesLocal_BDDC(PC pc,IS NeumannBoundaries) 632 { 633 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 634 PetscBool isequal = PETSC_FALSE; 635 PetscErrorCode ierr; 636 637 PetscFunctionBegin; 638 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 639 if (pcbddc->NeumannBoundariesLocal) { 640 ierr = ISEqual(NeumannBoundaries,pcbddc->NeumannBoundariesLocal,&isequal);CHKERRQ(ierr); 641 } 642 /* last user setting takes precendence -> destroy any other customization */ 643 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 644 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 645 pcbddc->NeumannBoundariesLocal = NeumannBoundaries; 646 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 647 PetscFunctionReturn(0); 648 } 649 650 #undef __FUNCT__ 651 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal" 652 /*@ 653 PCBDDCSetNeumannBoundariesLocal - Set IS defining Neumann boundaries for the global problem in local ordering. 654 655 Collective 656 657 Input Parameters: 658 + pc - the preconditioning context 659 - NeumannBoundaries - parallel IS defining the subdomain part of Neumann boundaries (in local ordering) 660 661 Level: intermediate 662 663 Notes: 664 665 .seealso: PCBDDC, PCBDDCSetNeumannBoundaries() 666 @*/ 667 PetscErrorCode PCBDDCSetNeumannBoundariesLocal(PC pc,IS NeumannBoundaries) 668 { 669 PetscErrorCode ierr; 670 671 PetscFunctionBegin; 672 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 673 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 674 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 675 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundariesLocal_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 676 PetscFunctionReturn(0); 677 } 678 /* -------------------------------------------------------------------------- */ 679 680 #undef __FUNCT__ 681 #define __FUNCT__ "PCBDDCGetDirichletBoundaries_BDDC" 682 static PetscErrorCode PCBDDCGetDirichletBoundaries_BDDC(PC pc,IS *DirichletBoundaries) 683 { 684 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 685 686 PetscFunctionBegin; 687 *DirichletBoundaries = pcbddc->DirichletBoundaries; 688 PetscFunctionReturn(0); 689 } 690 691 #undef __FUNCT__ 692 #define __FUNCT__ "PCBDDCGetDirichletBoundaries" 693 /*@ 694 PCBDDCGetDirichletBoundaries - Get parallel IS for Dirichlet boundaries 695 696 Collective 697 698 Input Parameters: 699 . pc - the preconditioning context 700 701 Output Parameters: 702 . DirichletBoundaries - index set defining the Dirichlet boundaries 703 704 Level: intermediate 705 706 Notes: 707 The IS returned (if any) is the same passed in earlier by the user with PCBDDCSetDirichletBoundaries 708 709 .seealso: PCBDDC 710 @*/ 711 PetscErrorCode PCBDDCGetDirichletBoundaries(PC pc,IS *DirichletBoundaries) 712 { 713 PetscErrorCode ierr; 714 715 PetscFunctionBegin; 716 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 717 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundaries_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 718 PetscFunctionReturn(0); 719 } 720 /* -------------------------------------------------------------------------- */ 721 722 #undef __FUNCT__ 723 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal_BDDC" 724 static PetscErrorCode PCBDDCGetDirichletBoundariesLocal_BDDC(PC pc,IS *DirichletBoundaries) 725 { 726 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 727 728 PetscFunctionBegin; 729 *DirichletBoundaries = pcbddc->DirichletBoundariesLocal; 730 PetscFunctionReturn(0); 731 } 732 733 #undef __FUNCT__ 734 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal" 735 /*@ 736 PCBDDCGetDirichletBoundariesLocal - Get parallel IS for Dirichlet boundaries (in local ordering) 737 738 Collective 739 740 Input Parameters: 741 . pc - the preconditioning context 742 743 Output Parameters: 744 . DirichletBoundaries - index set defining the subdomain part of Dirichlet boundaries 745 746 Level: intermediate 747 748 Notes: 749 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). 750 In the latter case, the IS will be available after PCSetUp. 751 752 .seealso: PCBDDC 753 @*/ 754 PetscErrorCode PCBDDCGetDirichletBoundariesLocal(PC pc,IS *DirichletBoundaries) 755 { 756 PetscErrorCode ierr; 757 758 PetscFunctionBegin; 759 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 760 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundariesLocal_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 761 PetscFunctionReturn(0); 762 } 763 /* -------------------------------------------------------------------------- */ 764 765 #undef __FUNCT__ 766 #define __FUNCT__ "PCBDDCGetNeumannBoundaries_BDDC" 767 static PetscErrorCode PCBDDCGetNeumannBoundaries_BDDC(PC pc,IS *NeumannBoundaries) 768 { 769 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 770 771 PetscFunctionBegin; 772 *NeumannBoundaries = pcbddc->NeumannBoundaries; 773 PetscFunctionReturn(0); 774 } 775 776 #undef __FUNCT__ 777 #define __FUNCT__ "PCBDDCGetNeumannBoundaries" 778 /*@ 779 PCBDDCGetNeumannBoundaries - Get parallel IS for Neumann boundaries 780 781 Collective 782 783 Input Parameters: 784 . pc - the preconditioning context 785 786 Output Parameters: 787 . NeumannBoundaries - index set defining the Neumann boundaries 788 789 Level: intermediate 790 791 Notes: 792 The IS returned (if any) is the same passed in earlier by the user with PCBDDCSetNeumannBoundaries 793 794 .seealso: PCBDDC 795 @*/ 796 PetscErrorCode PCBDDCGetNeumannBoundaries(PC pc,IS *NeumannBoundaries) 797 { 798 PetscErrorCode ierr; 799 800 PetscFunctionBegin; 801 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 802 ierr = PetscUseMethod(pc,"PCBDDCGetNeumannBoundaries_C",(PC,IS*),(pc,NeumannBoundaries));CHKERRQ(ierr); 803 PetscFunctionReturn(0); 804 } 805 /* -------------------------------------------------------------------------- */ 806 807 #undef __FUNCT__ 808 #define __FUNCT__ "PCBDDCGetNeumannBoundariesLocal_BDDC" 809 static PetscErrorCode PCBDDCGetNeumannBoundariesLocal_BDDC(PC pc,IS *NeumannBoundaries) 810 { 811 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 812 813 PetscFunctionBegin; 814 *NeumannBoundaries = pcbddc->NeumannBoundariesLocal; 815 PetscFunctionReturn(0); 816 } 817 818 #undef __FUNCT__ 819 #define __FUNCT__ "PCBDDCGetNeumannBoundariesLocal" 820 /*@ 821 PCBDDCGetNeumannBoundariesLocal - Get parallel IS for Neumann boundaries (in local ordering) 822 823 Collective 824 825 Input Parameters: 826 . pc - the preconditioning context 827 828 Output Parameters: 829 . NeumannBoundaries - index set defining the subdomain part of Neumann boundaries 830 831 Level: intermediate 832 833 Notes: 834 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). 835 In the latter case, the IS will be available after PCSetUp. 836 837 .seealso: PCBDDC 838 @*/ 839 PetscErrorCode PCBDDCGetNeumannBoundariesLocal(PC pc,IS *NeumannBoundaries) 840 { 841 PetscErrorCode ierr; 842 843 PetscFunctionBegin; 844 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 845 ierr = PetscUseMethod(pc,"PCBDDCGetNeumannBoundariesLocal_C",(PC,IS*),(pc,NeumannBoundaries));CHKERRQ(ierr); 846 PetscFunctionReturn(0); 847 } 848 /* -------------------------------------------------------------------------- */ 849 850 #undef __FUNCT__ 851 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph_BDDC" 852 static PetscErrorCode PCBDDCSetLocalAdjacencyGraph_BDDC(PC pc, PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 853 { 854 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 855 PCBDDCGraph mat_graph = pcbddc->mat_graph; 856 PetscBool same_data = PETSC_FALSE; 857 PetscErrorCode ierr; 858 859 PetscFunctionBegin; 860 if (mat_graph->nvtxs_csr == nvtxs) { 861 if (mat_graph->xadj == xadj && mat_graph->adjncy == adjncy) same_data = PETSC_TRUE; 862 if (!same_data && mat_graph->xadj[nvtxs] == xadj[nvtxs]) { 863 ierr = PetscMemcmp(adjncy,mat_graph->adjncy,nvtxs*sizeof(PetscInt),&same_data);CHKERRQ(ierr); 864 } 865 } 866 if (!same_data) { 867 /* free old CSR */ 868 ierr = PCBDDCGraphResetCSR(mat_graph);CHKERRQ(ierr); 869 /* get CSR into graph structure */ 870 if (copymode == PETSC_COPY_VALUES) { 871 ierr = PetscMalloc1(nvtxs+1,&mat_graph->xadj);CHKERRQ(ierr); 872 ierr = PetscMalloc1(xadj[nvtxs],&mat_graph->adjncy);CHKERRQ(ierr); 873 ierr = PetscMemcpy(mat_graph->xadj,xadj,(nvtxs+1)*sizeof(PetscInt));CHKERRQ(ierr); 874 ierr = PetscMemcpy(mat_graph->adjncy,adjncy,xadj[nvtxs]*sizeof(PetscInt));CHKERRQ(ierr); 875 } else if (copymode == PETSC_OWN_POINTER) { 876 mat_graph->xadj = (PetscInt*)xadj; 877 mat_graph->adjncy = (PetscInt*)adjncy; 878 } 879 mat_graph->nvtxs_csr = nvtxs; 880 pcbddc->recompute_topography = PETSC_TRUE; 881 } 882 PetscFunctionReturn(0); 883 } 884 885 #undef __FUNCT__ 886 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph" 887 /*@ 888 PCBDDCSetLocalAdjacencyGraph - Set adjacency structure (CSR graph) of the local matrix 889 890 Not collective 891 892 Input Parameters: 893 + pc - the preconditioning context 894 . nvtxs - number of local vertices of the graph (i.e., the size of the local problem) 895 . xadj, adjncy - the CSR graph 896 - copymode - either PETSC_COPY_VALUES or PETSC_OWN_POINTER. 897 898 Level: intermediate 899 900 Notes: 901 902 .seealso: PCBDDC,PetscCopyMode 903 @*/ 904 PetscErrorCode PCBDDCSetLocalAdjacencyGraph(PC pc,PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 905 { 906 void (*f)(void) = 0; 907 PetscErrorCode ierr; 908 909 PetscFunctionBegin; 910 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 911 PetscValidIntPointer(xadj,3); 912 PetscValidIntPointer(adjncy,4); 913 if (copymode != PETSC_COPY_VALUES && copymode != PETSC_OWN_POINTER) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unsupported copy mode %d",copymode); 914 ierr = PetscTryMethod(pc,"PCBDDCSetLocalAdjacencyGraph_C",(PC,PetscInt,const PetscInt[],const PetscInt[],PetscCopyMode),(pc,nvtxs,xadj,adjncy,copymode));CHKERRQ(ierr); 915 /* free arrays if PCBDDC is not the PC type */ 916 ierr = PetscObjectQueryFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",&f);CHKERRQ(ierr); 917 if (!f && copymode == PETSC_OWN_POINTER) { 918 ierr = PetscFree(xadj);CHKERRQ(ierr); 919 ierr = PetscFree(adjncy);CHKERRQ(ierr); 920 } 921 PetscFunctionReturn(0); 922 } 923 /* -------------------------------------------------------------------------- */ 924 925 #undef __FUNCT__ 926 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal_BDDC" 927 static PetscErrorCode PCBDDCSetDofsSplittingLocal_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 928 { 929 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 930 PetscInt i; 931 PetscBool isequal = PETSC_FALSE; 932 PetscErrorCode ierr; 933 934 PetscFunctionBegin; 935 if (pcbddc->n_ISForDofsLocal == n_is) { 936 for (i=0;i<n_is;i++) { 937 PetscBool isequalt; 938 ierr = ISEqual(ISForDofs[i],pcbddc->ISForDofsLocal[i],&isequalt);CHKERRQ(ierr); 939 if (!isequalt) break; 940 } 941 if (i == n_is) isequal = PETSC_TRUE; 942 } 943 for (i=0;i<n_is;i++) { 944 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 945 } 946 /* Destroy ISes if they were already set */ 947 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 948 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 949 } 950 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 951 /* last user setting takes precendence -> destroy any other customization */ 952 for (i=0;i<pcbddc->n_ISForDofs;i++) { 953 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 954 } 955 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 956 pcbddc->n_ISForDofs = 0; 957 /* allocate space then set */ 958 if (n_is) { 959 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofsLocal);CHKERRQ(ierr); 960 } 961 for (i=0;i<n_is;i++) { 962 pcbddc->ISForDofsLocal[i] = ISForDofs[i]; 963 } 964 pcbddc->n_ISForDofsLocal = n_is; 965 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 966 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 967 PetscFunctionReturn(0); 968 } 969 970 #undef __FUNCT__ 971 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal" 972 /*@ 973 PCBDDCSetDofsSplittingLocal - Set index sets defining fields of the local subdomain matrix 974 975 Collective 976 977 Input Parameters: 978 + pc - the preconditioning context 979 . n_is - number of index sets defining the fields 980 - ISForDofs - array of IS describing the fields in local ordering 981 982 Level: intermediate 983 984 Notes: 985 n_is should be the same among processes. Not all nodes need to be listed: unlisted nodes will belong to the complement field. 986 987 .seealso: PCBDDC 988 @*/ 989 PetscErrorCode PCBDDCSetDofsSplittingLocal(PC pc,PetscInt n_is, IS ISForDofs[]) 990 { 991 PetscInt i; 992 PetscErrorCode ierr; 993 994 PetscFunctionBegin; 995 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 996 PetscValidLogicalCollectiveInt(pc,n_is,2); 997 for (i=0;i<n_is;i++) { 998 PetscCheckSameComm(pc,1,ISForDofs[i],3); 999 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 1000 } 1001 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplittingLocal_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 1002 PetscFunctionReturn(0); 1003 } 1004 /* -------------------------------------------------------------------------- */ 1005 1006 #undef __FUNCT__ 1007 #define __FUNCT__ "PCBDDCSetDofsSplitting_BDDC" 1008 static PetscErrorCode PCBDDCSetDofsSplitting_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 1009 { 1010 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1011 PetscInt i; 1012 PetscBool isequal = PETSC_FALSE; 1013 PetscErrorCode ierr; 1014 1015 PetscFunctionBegin; 1016 if (pcbddc->n_ISForDofs == n_is) { 1017 for (i=0;i<n_is;i++) { 1018 PetscBool isequalt; 1019 ierr = ISEqual(ISForDofs[i],pcbddc->ISForDofs[i],&isequalt);CHKERRQ(ierr); 1020 if (!isequalt) break; 1021 } 1022 if (i == n_is) isequal = PETSC_TRUE; 1023 } 1024 for (i=0;i<n_is;i++) { 1025 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 1026 } 1027 /* Destroy ISes if they were already set */ 1028 for (i=0;i<pcbddc->n_ISForDofs;i++) { 1029 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 1030 } 1031 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 1032 /* last user setting takes precendence -> destroy any other customization */ 1033 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 1034 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 1035 } 1036 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 1037 pcbddc->n_ISForDofsLocal = 0; 1038 /* allocate space then set */ 1039 if (n_is) { 1040 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofs);CHKERRQ(ierr); 1041 } 1042 for (i=0;i<n_is;i++) { 1043 pcbddc->ISForDofs[i] = ISForDofs[i]; 1044 } 1045 pcbddc->n_ISForDofs = n_is; 1046 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 1047 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 1048 PetscFunctionReturn(0); 1049 } 1050 1051 #undef __FUNCT__ 1052 #define __FUNCT__ "PCBDDCSetDofsSplitting" 1053 /*@ 1054 PCBDDCSetDofsSplitting - Set index sets defining fields of the global matrix 1055 1056 Collective 1057 1058 Input Parameters: 1059 + pc - the preconditioning context 1060 . n_is - number of index sets defining the fields 1061 - ISForDofs - array of IS describing the fields in global ordering 1062 1063 Level: intermediate 1064 1065 Notes: 1066 Any process can list any global node. Not all nodes need to be listed: unlisted nodes will belong to the complement field. 1067 1068 .seealso: PCBDDC 1069 @*/ 1070 PetscErrorCode PCBDDCSetDofsSplitting(PC pc,PetscInt n_is, IS ISForDofs[]) 1071 { 1072 PetscInt i; 1073 PetscErrorCode ierr; 1074 1075 PetscFunctionBegin; 1076 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 1077 PetscValidLogicalCollectiveInt(pc,n_is,2); 1078 for (i=0;i<n_is;i++) { 1079 PetscCheckSameComm(pc,1,ISForDofs[i],3); 1080 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 1081 } 1082 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplitting_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 1083 PetscFunctionReturn(0); 1084 } 1085 1086 /* -------------------------------------------------------------------------- */ 1087 #undef __FUNCT__ 1088 #define __FUNCT__ "PCPreSolve_BDDC" 1089 /* -------------------------------------------------------------------------- */ 1090 /* 1091 PCPreSolve_BDDC - Changes the right hand side and (if necessary) the initial 1092 guess if a transformation of basis approach has been selected. 1093 1094 Input Parameter: 1095 + pc - the preconditioner contex 1096 1097 Application Interface Routine: PCPreSolve() 1098 1099 Notes: 1100 The interface routine PCPreSolve() is not usually called directly by 1101 the user, but instead is called by KSPSolve(). 1102 */ 1103 static PetscErrorCode PCPreSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 1104 { 1105 PetscErrorCode ierr; 1106 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1107 PC_IS *pcis = (PC_IS*)(pc->data); 1108 Vec used_vec; 1109 PetscBool copy_rhs = PETSC_TRUE; 1110 PetscBool iscg = PETSC_FALSE; 1111 1112 PetscFunctionBegin; 1113 /* if we are working with cg, one dirichlet solve can be avoided during Krylov iterations */ 1114 if (ksp) { 1115 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPCG,&iscg);CHKERRQ(ierr); 1116 if (!iscg || pcbddc->switch_static) { 1117 ierr = PCBDDCSetUseExactDirichlet(pc,PETSC_FALSE);CHKERRQ(ierr); 1118 } 1119 } 1120 /* Creates parallel work vectors used in presolve */ 1121 if (!pcbddc->original_rhs) { 1122 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->original_rhs);CHKERRQ(ierr); 1123 } 1124 if (!pcbddc->temp_solution) { 1125 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->temp_solution);CHKERRQ(ierr); 1126 } 1127 1128 ierr = VecSet(pcbddc->temp_solution,0.);CHKERRQ(ierr); 1129 if (x) { 1130 ierr = PetscObjectReference((PetscObject)x);CHKERRQ(ierr); 1131 used_vec = x; 1132 } else { /* it can only happen when calling PCBDDCMatFETIDPGetRHS */ 1133 ierr = PetscObjectReference((PetscObject)pcbddc->temp_solution);CHKERRQ(ierr); 1134 used_vec = pcbddc->temp_solution; 1135 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 1136 } 1137 1138 /* hack into ksp data structure since PCPreSolve comes earlier than setting to zero the guess in src/ksp/ksp/interface/itfunc.c */ 1139 if (ksp) { 1140 /* store the flag for the initial guess since it will be restored back during PCPostSolve_BDDC */ 1141 ierr = KSPGetInitialGuessNonzero(ksp,&pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 1142 if (!pcbddc->ksp_guess_nonzero) { 1143 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 1144 } 1145 } 1146 1147 pcbddc->rhs_change = PETSC_FALSE; 1148 /* Take into account zeroed rows -> change rhs and store solution removed */ 1149 if (rhs) { 1150 IS dirIS = NULL; 1151 1152 /* DirichletBoundariesLocal may not be consistent among neighbours; gets a dirichlet dofs IS from graph (may be cached) */ 1153 ierr = PCBDDCGraphGetDirichletDofs(pcbddc->mat_graph,&dirIS);CHKERRQ(ierr); 1154 if (dirIS) { 1155 Mat_IS *matis = (Mat_IS*)pc->pmat->data; 1156 PetscInt dirsize,i,*is_indices; 1157 PetscScalar *array_x; 1158 const PetscScalar *array_diagonal; 1159 1160 ierr = MatGetDiagonal(pc->pmat,pcis->vec1_global);CHKERRQ(ierr); 1161 ierr = VecPointwiseDivide(pcis->vec1_global,rhs,pcis->vec1_global);CHKERRQ(ierr); 1162 ierr = VecScatterBegin(matis->rctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1163 ierr = VecScatterEnd(matis->rctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1164 ierr = VecScatterBegin(matis->rctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1165 ierr = VecScatterEnd(matis->rctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1166 ierr = ISGetLocalSize(dirIS,&dirsize);CHKERRQ(ierr); 1167 ierr = VecGetArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1168 ierr = VecGetArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1169 ierr = ISGetIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1170 for (i=0; i<dirsize; i++) array_x[is_indices[i]] = array_diagonal[is_indices[i]]; 1171 ierr = ISRestoreIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1172 ierr = VecRestoreArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1173 ierr = VecRestoreArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1174 ierr = VecScatterBegin(matis->rctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1175 ierr = VecScatterEnd(matis->rctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1176 pcbddc->rhs_change = PETSC_TRUE; 1177 ierr = ISDestroy(&dirIS);CHKERRQ(ierr); 1178 } 1179 } 1180 1181 /* remove the computed solution or the initial guess from the rhs */ 1182 if (pcbddc->rhs_change || (ksp && pcbddc->ksp_guess_nonzero) ) { 1183 /* store the original rhs */ 1184 if (copy_rhs) { 1185 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1186 copy_rhs = PETSC_FALSE; 1187 } 1188 pcbddc->rhs_change = PETSC_TRUE; 1189 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1190 ierr = MatMultAdd(pc->mat,used_vec,rhs,rhs);CHKERRQ(ierr); 1191 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1192 ierr = VecCopy(used_vec,pcbddc->temp_solution);CHKERRQ(ierr); 1193 if (ksp) { 1194 ierr = KSPSetInitialGuessNonzero(ksp,PETSC_FALSE);CHKERRQ(ierr); 1195 } 1196 } 1197 ierr = VecDestroy(&used_vec);CHKERRQ(ierr); 1198 1199 /* compute initial vector in benign space (TODO: what about FETI-DP?)*/ 1200 if (rhs && pcbddc->benign_saddle_point) { 1201 /* compute u^*_h as in Xuemin Tu's thesis (see Section 4.8.1) */ 1202 if (!pcbddc->benign_vec) { 1203 ierr = VecDuplicate(rhs,&pcbddc->benign_vec);CHKERRQ(ierr); 1204 } 1205 pcbddc->benign_apply_coarse_only = PETSC_TRUE; 1206 ierr = PCApply_BDDC(pc,rhs,pcbddc->benign_vec);CHKERRQ(ierr); 1207 pcbddc->benign_apply_coarse_only = PETSC_FALSE; 1208 /* TODO: what about Stokes? */ 1209 #if 0 1210 ierr = VecNorm(pcbddc->benign_vec,NORM_INFINITY,&norm);CHKERRQ(ierr); 1211 if (norm < PETSC_SMALL) benign_correction_is_zero = PETSC_TRUE; 1212 #endif 1213 } 1214 1215 /* remove non-benign solution from the rhs */ 1216 if (pcbddc->benign_saddle_point) { 1217 /* store the original rhs */ 1218 if (copy_rhs) { 1219 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1220 copy_rhs = PETSC_FALSE; 1221 } 1222 /* this code is disabled, until I test against incompressible Stokes */ 1223 #if 0 1224 if (benign_correction_is_zero) { /* still need to understand why it works great */ 1225 ierr = PCBDDCSetUseExactDirichlet(pc,PETSC_FALSE);CHKERRQ(ierr); 1226 ierr = PCApply_BDDC(pc,rhs,pcbddc->benign_vec);CHKERRQ(ierr); 1227 } 1228 #endif 1229 ierr = VecScale(pcbddc->benign_vec,-1.0);CHKERRQ(ierr); 1230 ierr = MatMultAdd(pc->mat,pcbddc->benign_vec,rhs,rhs);CHKERRQ(ierr); 1231 pcbddc->rhs_change = PETSC_TRUE; 1232 ierr = VecAXPY(pcbddc->temp_solution,-1.0,pcbddc->benign_vec);CHKERRQ(ierr); 1233 } 1234 1235 /* set initial guess if using PCG */ 1236 if (x && pcbddc->use_exact_dirichlet_trick) { 1237 ierr = VecSet(x,0.0);CHKERRQ(ierr); 1238 if (pcbddc->ChangeOfBasisMatrix && pcbddc->change_interior) { 1239 if (pcbddc->benign_saddle_point) { /* we have already saved the changed rhs */ 1240 ierr = VecLockPop(pcis->vec1_global);CHKERRQ(ierr); 1241 } else { 1242 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,rhs,pcis->vec1_global);CHKERRQ(ierr); 1243 } 1244 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec1_global,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1245 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec1_global,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1246 } else { 1247 ierr = VecScatterBegin(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1248 ierr = VecScatterEnd(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1249 } 1250 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1251 if (pcbddc->ChangeOfBasisMatrix && pcbddc->change_interior) { 1252 ierr = VecSet(pcis->vec1_global,0.);CHKERRQ(ierr); 1253 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,pcis->vec1_global,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1254 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,pcis->vec1_global,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1255 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,pcis->vec1_global,x);CHKERRQ(ierr); 1256 } else { 1257 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1258 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1259 } 1260 if (ksp) { 1261 ierr = KSPSetInitialGuessNonzero(ksp,PETSC_TRUE);CHKERRQ(ierr); 1262 } 1263 } 1264 PetscFunctionReturn(0); 1265 } 1266 1267 /* -------------------------------------------------------------------------- */ 1268 #undef __FUNCT__ 1269 #define __FUNCT__ "PCPostSolve_BDDC" 1270 /* -------------------------------------------------------------------------- */ 1271 /* 1272 PCPostSolve_BDDC - Changes the computed solution if a transformation of basis 1273 approach has been selected. Also, restores rhs to its original state. 1274 1275 Input Parameter: 1276 + pc - the preconditioner contex 1277 1278 Application Interface Routine: PCPostSolve() 1279 1280 Notes: 1281 The interface routine PCPostSolve() is not usually called directly by 1282 the user, but instead is called by KSPSolve(). 1283 */ 1284 static PetscErrorCode PCPostSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 1285 { 1286 PetscErrorCode ierr; 1287 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1288 1289 PetscFunctionBegin; 1290 /* add solution removed in presolve */ 1291 if (x && pcbddc->rhs_change) { 1292 ierr = VecAXPY(x,1.0,pcbddc->temp_solution);CHKERRQ(ierr); 1293 } 1294 /* restore rhs to its original state */ 1295 if (rhs && pcbddc->rhs_change) { 1296 ierr = VecCopy(pcbddc->original_rhs,rhs);CHKERRQ(ierr); 1297 } 1298 pcbddc->rhs_change = PETSC_FALSE; 1299 /* restore ksp guess state */ 1300 if (ksp) { 1301 ierr = KSPSetInitialGuessNonzero(ksp,pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 1302 } 1303 PetscFunctionReturn(0); 1304 } 1305 /* -------------------------------------------------------------------------- */ 1306 #undef __FUNCT__ 1307 #define __FUNCT__ "PCSetUp_BDDC" 1308 /* -------------------------------------------------------------------------- */ 1309 /* 1310 PCSetUp_BDDC - Prepares for the use of the BDDC preconditioner 1311 by setting data structures and options. 1312 1313 Input Parameter: 1314 + pc - the preconditioner context 1315 1316 Application Interface Routine: PCSetUp() 1317 1318 Notes: 1319 The interface routine PCSetUp() is not usually called directly by 1320 the user, but instead is called by PCApply() if necessary. 1321 */ 1322 PetscErrorCode PCSetUp_BDDC(PC pc) 1323 { 1324 PetscErrorCode ierr; 1325 PC_BDDC* pcbddc = (PC_BDDC*)pc->data; 1326 Mat_IS* matis; 1327 MatNullSpace nearnullspace; 1328 IS zerodiag = NULL; 1329 PetscInt nrows,ncols; 1330 PetscBool computetopography,computesolvers,computesubschurs; 1331 PetscBool computeconstraintsmatrix; 1332 PetscBool new_nearnullspace_provided,ismatis; 1333 1334 PetscFunctionBegin; 1335 ierr = PetscObjectTypeCompare((PetscObject)pc->pmat,MATIS,&ismatis);CHKERRQ(ierr); 1336 if (!ismatis) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONG,"PCBDDC preconditioner requires matrix of type MATIS"); 1337 ierr = MatGetSize(pc->pmat,&nrows,&ncols);CHKERRQ(ierr); 1338 if (nrows != ncols) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"PCBDDC preconditioner requires a square preconditioning matrix"); 1339 matis = (Mat_IS*)pc->pmat->data; 1340 /* the following lines of code should be replaced by a better logic between PCIS, PCNN, PCBDDC and other future nonoverlapping preconditioners */ 1341 /* For BDDC we need to define a local "Neumann" problem different to that defined in PCISSetup 1342 Also, BDDC directly build the Dirichlet problem */ 1343 /* split work */ 1344 if (pc->setupcalled) { 1345 if (pc->flag == SAME_NONZERO_PATTERN) { 1346 computetopography = PETSC_FALSE; 1347 computesolvers = PETSC_TRUE; 1348 } else { /* DIFFERENT_NONZERO_PATTERN */ 1349 computetopography = PETSC_TRUE; 1350 computesolvers = PETSC_TRUE; 1351 } 1352 } else { 1353 computetopography = PETSC_TRUE; 1354 computesolvers = PETSC_TRUE; 1355 } 1356 if (pcbddc->recompute_topography) { 1357 computetopography = PETSC_TRUE; 1358 } 1359 pcbddc->recompute_topography = computetopography; 1360 computeconstraintsmatrix = PETSC_FALSE; 1361 1362 /* check parameters' compatibility */ 1363 if (!pcbddc->use_deluxe_scaling) pcbddc->deluxe_zerorows = PETSC_FALSE; 1364 pcbddc->adaptive_selection = (PetscBool)(pcbddc->adaptive_threshold > 0.0); 1365 pcbddc->adaptive_userdefined = (PetscBool)(pcbddc->adaptive_selection && pcbddc->adaptive_userdefined); 1366 if (pcbddc->adaptive_selection) pcbddc->use_faces = PETSC_TRUE; 1367 1368 computesubschurs = (PetscBool)(pcbddc->adaptive_selection || pcbddc->use_deluxe_scaling); 1369 if (pcbddc->faster_deluxe && pcbddc->adaptive_selection && pcbddc->use_change_of_basis) 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"); 1370 1371 if (pcbddc->switch_static) { 1372 PetscBool ismatis; 1373 ierr = PetscObjectTypeCompare((PetscObject)pc->mat,MATIS,&ismatis);CHKERRQ(ierr); 1374 if (!ismatis) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"When the static switch is one, the iteration matrix should be of type MATIS"); 1375 } 1376 1377 /* Get stdout for dbg */ 1378 if (pcbddc->dbg_flag) { 1379 if (!pcbddc->dbg_viewer) { 1380 pcbddc->dbg_viewer = PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)pc)); 1381 ierr = PetscViewerASCIIPushSynchronized(pcbddc->dbg_viewer);CHKERRQ(ierr); 1382 } 1383 ierr = PetscViewerASCIIAddTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1384 } 1385 1386 if (pcbddc->user_ChangeOfBasisMatrix) { 1387 /* use_change_of_basis flag is used to automatically compute a change of basis from constraints */ 1388 pcbddc->use_change_of_basis = PETSC_FALSE; 1389 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 1390 } else { 1391 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1392 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1393 pcbddc->local_mat = matis->A; 1394 } 1395 1396 /* detect local disconnected subdomains if requested and not done before */ 1397 if (pcbddc->detect_disconnected && !pcbddc->n_local_subs) { 1398 ierr = MatDetectDisconnectedComponents(pcbddc->local_mat,PETSC_FALSE,&pcbddc->n_local_subs,&pcbddc->local_subs);CHKERRQ(ierr); 1399 } 1400 1401 /* 1402 Compute change of basis on local pressures (aka zerodiag dofs) 1403 This should come earlier then PCISSetUp for extracting the correct subdomain matrices 1404 */ 1405 ierr = PCBDDCBenignShellMat(pc,PETSC_TRUE);CHKERRQ(ierr); 1406 if (pcbddc->benign_saddle_point) { 1407 PC_IS* pcis = (PC_IS*)pc->data; 1408 1409 if (pcbddc->user_ChangeOfBasisMatrix || pcbddc->use_change_of_basis || !computesubschurs) pcbddc->benign_change_explicit = PETSC_TRUE; 1410 /* detect local saddle point and change the basis in pcbddc->local_mat */ 1411 ierr = PCBDDCBenignDetectSaddlePoint(pc,&zerodiag);CHKERRQ(ierr); 1412 /* pop B0 mat from local mat */ 1413 ierr = PCBDDCBenignPopOrPushB0(pc,PETSC_TRUE);CHKERRQ(ierr); 1414 /* give pcis a hint to not reuse submatrices during PCISCreate */ 1415 if (pc->flag == SAME_NONZERO_PATTERN && pcis->reusesubmatrices == PETSC_TRUE) { 1416 if (pcbddc->benign_n && (pcbddc->benign_change_explicit || pcbddc->dbg_flag)) { 1417 pcis->reusesubmatrices = PETSC_FALSE; 1418 } else { 1419 pcis->reusesubmatrices = PETSC_TRUE; 1420 } 1421 } else { 1422 pcis->reusesubmatrices = PETSC_FALSE; 1423 } 1424 } 1425 /* propagate relevant information */ 1426 #if !defined(PETSC_USE_COMPLEX) /* workaround for reals */ 1427 if (matis->A->symmetric_set) { 1428 ierr = MatSetOption(pcbddc->local_mat,MAT_HERMITIAN,matis->A->symmetric);CHKERRQ(ierr); 1429 } 1430 #endif 1431 if (matis->A->symmetric_set) { 1432 ierr = MatSetOption(pcbddc->local_mat,MAT_SYMMETRIC,matis->A->symmetric);CHKERRQ(ierr); 1433 } 1434 if (matis->A->spd_set) { 1435 ierr = MatSetOption(pcbddc->local_mat,MAT_SPD,matis->A->spd);CHKERRQ(ierr); 1436 } 1437 1438 /* Set up all the "iterative substructuring" common block without computing solvers */ 1439 { 1440 Mat temp_mat; 1441 1442 temp_mat = matis->A; 1443 matis->A = pcbddc->local_mat; 1444 ierr = PCISSetUp(pc,PETSC_FALSE);CHKERRQ(ierr); 1445 pcbddc->local_mat = matis->A; 1446 matis->A = temp_mat; 1447 } 1448 1449 /* Analyze interface */ 1450 if (computetopography) { 1451 ierr = PCBDDCAnalyzeInterface(pc);CHKERRQ(ierr); 1452 computeconstraintsmatrix = PETSC_TRUE; 1453 } 1454 1455 /* check existence of a divergence free extension, i.e. 1456 b(v_I,p_0) = 0 for all v_I (raise error if not). 1457 Also, check that PCBDDCBenignGetOrSetP0 works */ 1458 #if defined(PETSC_USE_DEBUG) 1459 if (pcbddc->benign_saddle_point) { 1460 ierr = PCBDDCBenignCheck(pc,zerodiag);CHKERRQ(ierr); 1461 } 1462 #endif 1463 ierr = ISDestroy(&zerodiag);CHKERRQ(ierr); 1464 1465 /* Setup local dirichlet solver ksp_D and sub_schurs solvers */ 1466 if (computesolvers) { 1467 PCBDDCSubSchurs sub_schurs=pcbddc->sub_schurs; 1468 1469 if (computesubschurs && computetopography) { 1470 ierr = PCBDDCInitSubSchurs(pc);CHKERRQ(ierr); 1471 } 1472 /* SetUp Scaling operator (scaling matrices could be needed in SubSchursSetUp)*/ 1473 if (!pcbddc->use_deluxe_scaling) { 1474 ierr = PCBDDCScalingSetUp(pc);CHKERRQ(ierr); 1475 } 1476 if (sub_schurs->schur_explicit) { 1477 if (computesubschurs) { 1478 ierr = PCBDDCSetUpSubSchurs(pc);CHKERRQ(ierr); 1479 } 1480 ierr = PCBDDCSetUpLocalSolvers(pc,PETSC_TRUE,PETSC_FALSE);CHKERRQ(ierr); 1481 } else { 1482 ierr = PCBDDCSetUpLocalSolvers(pc,PETSC_TRUE,PETSC_FALSE);CHKERRQ(ierr); 1483 if (computesubschurs) { 1484 ierr = PCBDDCSetUpSubSchurs(pc);CHKERRQ(ierr); 1485 } 1486 } 1487 if (pcbddc->adaptive_selection) { 1488 ierr = PCBDDCAdaptiveSelection(pc);CHKERRQ(ierr); 1489 computeconstraintsmatrix = PETSC_TRUE; 1490 } 1491 } 1492 1493 /* infer if NullSpace object attached to Mat via MatSetNearNullSpace has changed */ 1494 new_nearnullspace_provided = PETSC_FALSE; 1495 ierr = MatGetNearNullSpace(pc->pmat,&nearnullspace);CHKERRQ(ierr); 1496 if (pcbddc->onearnullspace) { /* already used nearnullspace */ 1497 if (!nearnullspace) { /* near null space attached to mat has been destroyed */ 1498 new_nearnullspace_provided = PETSC_TRUE; 1499 } else { 1500 /* determine if the two nullspaces are different (should be lightweight) */ 1501 if (nearnullspace != pcbddc->onearnullspace) { 1502 new_nearnullspace_provided = PETSC_TRUE; 1503 } else { /* maybe the user has changed the content of the nearnullspace so check vectors ObjectStateId */ 1504 PetscInt i; 1505 const Vec *nearnullvecs; 1506 PetscObjectState state; 1507 PetscInt nnsp_size; 1508 ierr = MatNullSpaceGetVecs(nearnullspace,NULL,&nnsp_size,&nearnullvecs);CHKERRQ(ierr); 1509 for (i=0;i<nnsp_size;i++) { 1510 ierr = PetscObjectStateGet((PetscObject)nearnullvecs[i],&state);CHKERRQ(ierr); 1511 if (pcbddc->onearnullvecs_state[i] != state) { 1512 new_nearnullspace_provided = PETSC_TRUE; 1513 break; 1514 } 1515 } 1516 } 1517 } 1518 } else { 1519 if (!nearnullspace) { /* both nearnullspaces are null */ 1520 new_nearnullspace_provided = PETSC_FALSE; 1521 } else { /* nearnullspace attached later */ 1522 new_nearnullspace_provided = PETSC_TRUE; 1523 } 1524 } 1525 1526 /* Setup constraints and related work vectors */ 1527 /* reset primal space flags */ 1528 pcbddc->new_primal_space = PETSC_FALSE; 1529 pcbddc->new_primal_space_local = PETSC_FALSE; 1530 if (computeconstraintsmatrix || new_nearnullspace_provided) { 1531 /* It also sets the primal space flags */ 1532 ierr = PCBDDCConstraintsSetUp(pc);CHKERRQ(ierr); 1533 /* Allocate needed local vectors (which depends on quantities defined during ConstraintsSetUp) */ 1534 ierr = PCBDDCSetUpLocalWorkVectors(pc);CHKERRQ(ierr); 1535 } 1536 1537 if (computesolvers || pcbddc->new_primal_space) { 1538 if (pcbddc->use_change_of_basis) { 1539 PC_IS *pcis = (PC_IS*)(pc->data); 1540 1541 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->ChangeOfBasisMatrix);CHKERRQ(ierr); 1542 if (pcbddc->benign_change) { 1543 ierr = MatDestroy(&pcbddc->benign_B0);CHKERRQ(ierr); 1544 /* pop B0 from pcbddc->local_mat */ 1545 ierr = PCBDDCBenignPopOrPushB0(pc,PETSC_TRUE);CHKERRQ(ierr); 1546 } 1547 /* get submatrices */ 1548 ierr = MatDestroy(&pcis->A_IB);CHKERRQ(ierr); 1549 ierr = MatDestroy(&pcis->A_BI);CHKERRQ(ierr); 1550 ierr = MatDestroy(&pcis->A_BB);CHKERRQ(ierr); 1551 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_BB);CHKERRQ(ierr); 1552 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_I_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_IB);CHKERRQ(ierr); 1553 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_I_local,MAT_INITIAL_MATRIX,&pcis->A_BI);CHKERRQ(ierr); 1554 /* set flag in pcis to not reuse submatrices during PCISCreate */ 1555 pcis->reusesubmatrices = PETSC_FALSE; 1556 } else if (!pcbddc->user_ChangeOfBasisMatrix && !pcbddc->benign_change) { 1557 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1558 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1559 pcbddc->local_mat = matis->A; 1560 } 1561 /* SetUp coarse and local Neumann solvers */ 1562 ierr = PCBDDCSetUpSolvers(pc);CHKERRQ(ierr); 1563 /* SetUp Scaling operator */ 1564 if (pcbddc->use_deluxe_scaling) { 1565 ierr = PCBDDCScalingSetUp(pc);CHKERRQ(ierr); 1566 } 1567 } 1568 /* mark topography as done */ 1569 pcbddc->recompute_topography = PETSC_FALSE; 1570 1571 /* wrap pcis->A_IB and pcis->A_BI if we did not change explicitly the variables on the pressures */ 1572 ierr = PCBDDCBenignShellMat(pc,PETSC_FALSE);CHKERRQ(ierr); 1573 1574 if (pcbddc->dbg_flag) { 1575 ierr = PetscViewerASCIISubtractTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1576 } 1577 PetscFunctionReturn(0); 1578 } 1579 1580 /* -------------------------------------------------------------------------- */ 1581 /* 1582 PCApply_BDDC - Applies the BDDC operator to a vector. 1583 1584 Input Parameters: 1585 + pc - the preconditioner context 1586 - r - input vector (global) 1587 1588 Output Parameter: 1589 . z - output vector (global) 1590 1591 Application Interface Routine: PCApply() 1592 */ 1593 #undef __FUNCT__ 1594 #define __FUNCT__ "PCApply_BDDC" 1595 PetscErrorCode PCApply_BDDC(PC pc,Vec r,Vec z) 1596 { 1597 PC_IS *pcis = (PC_IS*)(pc->data); 1598 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1599 PetscInt n_B = pcis->n_B, n_D = pcis->n - n_B; 1600 PetscErrorCode ierr; 1601 const PetscScalar one = 1.0; 1602 const PetscScalar m_one = -1.0; 1603 const PetscScalar zero = 0.0; 1604 1605 /* This code is similar to that provided in nn.c for PCNN 1606 NN interface preconditioner changed to BDDC 1607 Added support for M_3 preconditioner in the reference article (code is active if pcbddc->switch_static == PETSC_TRUE) */ 1608 1609 PetscFunctionBegin; 1610 if (pcbddc->ChangeOfBasisMatrix) { 1611 Vec swap; 1612 ierr = VecCopy(r,pcbddc->work_change);CHKERRQ(ierr); 1613 swap = pcbddc->work_change; 1614 pcbddc->work_change = r; 1615 r = swap; 1616 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,pcbddc->work_change,r);CHKERRQ(ierr); 1617 /* save rhs so that we don't need to apply the change of basis for the exact dirichlet trick in PreSolve */ 1618 if (pcbddc->benign_apply_coarse_only && pcbddc->use_exact_dirichlet_trick && pcbddc->change_interior) { 1619 ierr = VecCopy(r,pcis->vec1_global);CHKERRQ(ierr); 1620 ierr = VecLockPush(pcis->vec1_global);CHKERRQ(ierr); 1621 } 1622 } 1623 if (pcbddc->benign_saddle_point) { /* get p0 from r */ 1624 ierr = PCBDDCBenignGetOrSetP0(pc,r,PETSC_TRUE);CHKERRQ(ierr); 1625 } 1626 if (!pcbddc->use_exact_dirichlet_trick) { 1627 ierr = VecCopy(r,z);CHKERRQ(ierr); 1628 /* First Dirichlet solve */ 1629 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1630 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1631 /* 1632 Assembling right hand side for BDDC operator 1633 - pcis->vec1_D for the Dirichlet part (if needed, i.e. pcbddc->switch_static == PETSC_TRUE) 1634 - pcis->vec1_B the interface part of the global vector z 1635 */ 1636 if (n_D) { 1637 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1638 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1639 if (pcbddc->switch_static) { 1640 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1641 1642 ierr = VecSet(pcis->vec1_N,0.);CHKERRQ(ierr); 1643 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1644 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1645 if (!pcbddc->switch_static_change) { 1646 ierr = MatMult(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1647 } else { 1648 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1649 ierr = MatMult(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 1650 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1651 } 1652 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1653 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1654 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1655 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1656 } else { 1657 ierr = MatMult(pcis->A_BI,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 1658 } 1659 } else { 1660 ierr = VecSet(pcis->vec1_B,zero);CHKERRQ(ierr); 1661 } 1662 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1663 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1664 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 1665 } else { 1666 if (!pcbddc->benign_apply_coarse_only) { 1667 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 1668 } 1669 } 1670 1671 /* Apply interface preconditioner 1672 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 1673 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_FALSE);CHKERRQ(ierr); 1674 1675 /* Apply transpose of partition of unity operator */ 1676 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 1677 1678 /* Second Dirichlet solve and assembling of output */ 1679 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1680 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1681 if (n_B) { 1682 if (pcbddc->switch_static) { 1683 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1684 1685 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1686 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1687 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1688 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1689 if (!pcbddc->switch_static_change) { 1690 ierr = MatMult(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1691 } else { 1692 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1693 ierr = MatMult(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 1694 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1695 } 1696 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1697 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1698 } else { 1699 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 1700 } 1701 } else if (pcbddc->switch_static) { /* n_B is zero */ 1702 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1703 1704 if (!pcbddc->switch_static_change) { 1705 ierr = MatMult(matis->A,pcis->vec1_D,pcis->vec3_D);CHKERRQ(ierr); 1706 } else { 1707 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_D,pcis->vec1_N);CHKERRQ(ierr); 1708 ierr = MatMult(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1709 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec2_N,pcis->vec3_D);CHKERRQ(ierr); 1710 } 1711 } 1712 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 1713 1714 if (!pcbddc->use_exact_dirichlet_trick) { 1715 if (pcbddc->switch_static) { 1716 ierr = VecAXPBYPCZ(pcis->vec2_D,m_one,one,m_one,pcis->vec4_D,pcis->vec1_D);CHKERRQ(ierr); 1717 } else { 1718 ierr = VecAXPBY(pcis->vec2_D,m_one,m_one,pcis->vec4_D);CHKERRQ(ierr); 1719 } 1720 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1721 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1722 } else { 1723 if (pcbddc->switch_static) { 1724 ierr = VecAXPBY(pcis->vec4_D,one,m_one,pcis->vec1_D);CHKERRQ(ierr); 1725 } else { 1726 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 1727 } 1728 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1729 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1730 } 1731 1732 if (pcbddc->benign_saddle_point) { /* set p0 (computed in PCBDDCApplyInterface) */ 1733 if (pcbddc->benign_apply_coarse_only) { 1734 ierr = PetscMemzero(pcbddc->benign_p0,pcbddc->benign_n*sizeof(PetscScalar));CHKERRQ(ierr); 1735 } 1736 ierr = PCBDDCBenignGetOrSetP0(pc,z,PETSC_FALSE);CHKERRQ(ierr); 1737 } 1738 if (pcbddc->ChangeOfBasisMatrix) { 1739 Vec swap; 1740 1741 swap = r; 1742 r = pcbddc->work_change; 1743 pcbddc->work_change = swap; 1744 ierr = VecCopy(z,pcbddc->work_change);CHKERRQ(ierr); 1745 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,pcbddc->work_change,z);CHKERRQ(ierr); 1746 } 1747 PetscFunctionReturn(0); 1748 } 1749 1750 /* -------------------------------------------------------------------------- */ 1751 /* 1752 PCApplyTranspose_BDDC - Applies the transpose of the BDDC operator to a vector. 1753 1754 Input Parameters: 1755 + pc - the preconditioner context 1756 - r - input vector (global) 1757 1758 Output Parameter: 1759 . z - output vector (global) 1760 1761 Application Interface Routine: PCApplyTranspose() 1762 */ 1763 #undef __FUNCT__ 1764 #define __FUNCT__ "PCApplyTranspose_BDDC" 1765 PetscErrorCode PCApplyTranspose_BDDC(PC pc,Vec r,Vec z) 1766 { 1767 PC_IS *pcis = (PC_IS*)(pc->data); 1768 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1769 PetscInt n_B = pcis->n_B, n_D = pcis->n - n_B; 1770 PetscErrorCode ierr; 1771 const PetscScalar one = 1.0; 1772 const PetscScalar m_one = -1.0; 1773 const PetscScalar zero = 0.0; 1774 1775 PetscFunctionBegin; 1776 if (pcbddc->ChangeOfBasisMatrix) { 1777 Vec swap; 1778 ierr = VecCopy(r,pcbddc->work_change);CHKERRQ(ierr); 1779 swap = pcbddc->work_change; 1780 pcbddc->work_change = r; 1781 r = swap; 1782 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,pcbddc->work_change,r);CHKERRQ(ierr); 1783 } 1784 if (pcbddc->benign_saddle_point) { /* get p0 from r */ 1785 ierr = PCBDDCBenignGetOrSetP0(pc,r,PETSC_TRUE);CHKERRQ(ierr); 1786 } 1787 if (!pcbddc->use_exact_dirichlet_trick) { 1788 ierr = VecCopy(r,z);CHKERRQ(ierr); 1789 /* First Dirichlet solve */ 1790 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1791 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1792 /* 1793 Assembling right hand side for BDDC operator 1794 - pcis->vec1_D for the Dirichlet part (if needed, i.e. pcbddc->switch_static == PETSC_TRUE) 1795 - pcis->vec1_B the interface part of the global vector z 1796 */ 1797 if (n_D) { 1798 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1799 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1800 if (pcbddc->switch_static) { 1801 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1802 1803 ierr = VecSet(pcis->vec1_N,0.);CHKERRQ(ierr); 1804 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1805 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1806 if (!pcbddc->switch_static_change) { 1807 ierr = MatMultTranspose(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1808 } else { 1809 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1810 ierr = MatMultTranspose(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 1811 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1812 } 1813 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1814 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1815 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1816 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1817 } else { 1818 ierr = MatMultTranspose(pcis->A_IB,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 1819 } 1820 } else { 1821 ierr = VecSet(pcis->vec1_B,zero);CHKERRQ(ierr); 1822 } 1823 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1824 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1825 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 1826 } else { 1827 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 1828 } 1829 1830 /* Apply interface preconditioner 1831 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 1832 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_TRUE);CHKERRQ(ierr); 1833 1834 /* Apply transpose of partition of unity operator */ 1835 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 1836 1837 /* Second Dirichlet solve and assembling of output */ 1838 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1839 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1840 if (n_B) { 1841 if (pcbddc->switch_static) { 1842 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1843 1844 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1845 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1846 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1847 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1848 if (!pcbddc->switch_static_change) { 1849 ierr = MatMultTranspose(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1850 } else { 1851 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1852 ierr = MatMultTranspose(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 1853 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1854 } 1855 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1856 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1857 } else { 1858 ierr = MatMultTranspose(pcis->A_BI,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 1859 } 1860 } else if (pcbddc->switch_static) { /* n_B is zero */ 1861 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1862 1863 if (!pcbddc->switch_static_change) { 1864 ierr = MatMultTranspose(matis->A,pcis->vec1_D,pcis->vec3_D);CHKERRQ(ierr); 1865 } else { 1866 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_D,pcis->vec1_N);CHKERRQ(ierr); 1867 ierr = MatMultTranspose(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1868 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec2_N,pcis->vec3_D);CHKERRQ(ierr); 1869 } 1870 } 1871 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 1872 if (!pcbddc->use_exact_dirichlet_trick) { 1873 if (pcbddc->switch_static) { 1874 ierr = VecAXPBYPCZ(pcis->vec2_D,m_one,one,m_one,pcis->vec4_D,pcis->vec1_D);CHKERRQ(ierr); 1875 } else { 1876 ierr = VecAXPBY(pcis->vec2_D,m_one,m_one,pcis->vec4_D);CHKERRQ(ierr); 1877 } 1878 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1879 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1880 } else { 1881 if (pcbddc->switch_static) { 1882 ierr = VecAXPBY(pcis->vec4_D,one,m_one,pcis->vec1_D);CHKERRQ(ierr); 1883 } else { 1884 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 1885 } 1886 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1887 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1888 } 1889 if (pcbddc->benign_saddle_point) { /* set p0 (computed in PCBDDCApplyInterface) */ 1890 ierr = PCBDDCBenignGetOrSetP0(pc,z,PETSC_FALSE);CHKERRQ(ierr); 1891 } 1892 if (pcbddc->ChangeOfBasisMatrix) { 1893 Vec swap; 1894 1895 swap = r; 1896 r = pcbddc->work_change; 1897 pcbddc->work_change = swap; 1898 ierr = VecCopy(z,pcbddc->work_change);CHKERRQ(ierr); 1899 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,pcbddc->work_change,z);CHKERRQ(ierr); 1900 } 1901 PetscFunctionReturn(0); 1902 } 1903 /* -------------------------------------------------------------------------- */ 1904 1905 #undef __FUNCT__ 1906 #define __FUNCT__ "PCDestroy_BDDC" 1907 PetscErrorCode PCDestroy_BDDC(PC pc) 1908 { 1909 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1910 PetscErrorCode ierr; 1911 1912 PetscFunctionBegin; 1913 /* free BDDC custom data */ 1914 ierr = PCBDDCResetCustomization(pc);CHKERRQ(ierr); 1915 /* destroy objects related to topography */ 1916 ierr = PCBDDCResetTopography(pc);CHKERRQ(ierr); 1917 /* free allocated graph structure */ 1918 ierr = PetscFree(pcbddc->mat_graph);CHKERRQ(ierr); 1919 /* free allocated sub schurs structure */ 1920 ierr = PetscFree(pcbddc->sub_schurs);CHKERRQ(ierr); 1921 /* destroy objects for scaling operator */ 1922 ierr = PCBDDCScalingDestroy(pc);CHKERRQ(ierr); 1923 ierr = PetscFree(pcbddc->deluxe_ctx);CHKERRQ(ierr); 1924 /* free solvers stuff */ 1925 ierr = PCBDDCResetSolvers(pc);CHKERRQ(ierr); 1926 /* free global vectors needed in presolve */ 1927 ierr = VecDestroy(&pcbddc->temp_solution);CHKERRQ(ierr); 1928 ierr = VecDestroy(&pcbddc->original_rhs);CHKERRQ(ierr); 1929 /* free data created by PCIS */ 1930 ierr = PCISDestroy(pc);CHKERRQ(ierr); 1931 /* remove functions */ 1932 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",NULL);CHKERRQ(ierr); 1933 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",NULL);CHKERRQ(ierr); 1934 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesIS_C",NULL);CHKERRQ(ierr); 1935 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",NULL);CHKERRQ(ierr); 1936 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",NULL);CHKERRQ(ierr); 1937 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",NULL);CHKERRQ(ierr); 1938 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",NULL);CHKERRQ(ierr); 1939 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNullSpace_C",NULL);CHKERRQ(ierr); 1940 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 1941 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 1942 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 1943 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 1944 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 1945 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 1946 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 1947 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 1948 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",NULL);CHKERRQ(ierr); 1949 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",NULL);CHKERRQ(ierr); 1950 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",NULL);CHKERRQ(ierr); 1951 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",NULL);CHKERRQ(ierr); 1952 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",NULL);CHKERRQ(ierr); 1953 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",NULL);CHKERRQ(ierr); 1954 /* Free the private data structure */ 1955 ierr = PetscFree(pc->data);CHKERRQ(ierr); 1956 PetscFunctionReturn(0); 1957 } 1958 /* -------------------------------------------------------------------------- */ 1959 1960 #undef __FUNCT__ 1961 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS_BDDC" 1962 static PetscErrorCode PCBDDCMatFETIDPGetRHS_BDDC(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 1963 { 1964 FETIDPMat_ctx mat_ctx; 1965 Vec copy_standard_rhs; 1966 PC_IS* pcis; 1967 PC_BDDC* pcbddc; 1968 PetscErrorCode ierr; 1969 1970 PetscFunctionBegin; 1971 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 1972 pcis = (PC_IS*)mat_ctx->pc->data; 1973 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 1974 1975 /* 1976 change of basis for physical rhs if needed 1977 It also changes the rhs in case of dirichlet boundaries 1978 TODO: better management when FETIDP will have its own class 1979 */ 1980 ierr = VecDuplicate(standard_rhs,©_standard_rhs);CHKERRQ(ierr); 1981 ierr = VecCopy(standard_rhs,copy_standard_rhs);CHKERRQ(ierr); 1982 ierr = PCPreSolve_BDDC(mat_ctx->pc,NULL,copy_standard_rhs,NULL);CHKERRQ(ierr); 1983 /* store vectors for computation of fetidp final solution */ 1984 ierr = VecScatterBegin(pcis->global_to_D,copy_standard_rhs,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1985 ierr = VecScatterEnd(pcis->global_to_D,copy_standard_rhs,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1986 /* scale rhs since it should be unassembled */ 1987 /* TODO use counter scaling? (also below) */ 1988 ierr = VecScatterBegin(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1989 ierr = VecScatterEnd(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1990 /* Apply partition of unity */ 1991 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 1992 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,copy_standard_rhs,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 1993 if (!pcbddc->switch_static) { 1994 /* compute partially subassembled Schur complement right-hand side */ 1995 ierr = KSPSolve(pcbddc->ksp_D,mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 1996 ierr = MatMult(pcis->A_BI,pcis->vec1_D,pcis->vec1_B);CHKERRQ(ierr); 1997 ierr = VecAXPY(mat_ctx->temp_solution_B,-1.0,pcis->vec1_B);CHKERRQ(ierr); 1998 ierr = VecSet(copy_standard_rhs,0.0);CHKERRQ(ierr); 1999 ierr = VecScatterBegin(pcis->global_to_B,mat_ctx->temp_solution_B,copy_standard_rhs,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2000 ierr = VecScatterEnd(pcis->global_to_B,mat_ctx->temp_solution_B,copy_standard_rhs,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2001 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,copy_standard_rhs,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 2002 ierr = VecScatterBegin(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2003 ierr = VecScatterEnd(pcis->global_to_B,copy_standard_rhs,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2004 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 2005 } 2006 ierr = VecDestroy(©_standard_rhs);CHKERRQ(ierr); 2007 /* BDDC rhs */ 2008 ierr = VecCopy(mat_ctx->temp_solution_B,pcis->vec1_B);CHKERRQ(ierr); 2009 if (pcbddc->switch_static) { 2010 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 2011 } 2012 /* apply BDDC */ 2013 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 2014 /* Application of B_delta and assembling of rhs for fetidp fluxes */ 2015 ierr = VecSet(fetidp_flux_rhs,0.0);CHKERRQ(ierr); 2016 ierr = MatMult(mat_ctx->B_delta,pcis->vec1_B,mat_ctx->lambda_local);CHKERRQ(ierr); 2017 ierr = VecScatterBegin(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2018 ierr = VecScatterEnd(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2019 PetscFunctionReturn(0); 2020 } 2021 2022 #undef __FUNCT__ 2023 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS" 2024 /*@ 2025 PCBDDCMatFETIDPGetRHS - Compute the right-hand side for FETI-DP linear system using the physical right-hand side 2026 2027 Collective 2028 2029 Input Parameters: 2030 + fetidp_mat - the FETI-DP matrix object obtained by a call to PCBDDCCreateFETIDPOperators 2031 - standard_rhs - the right-hand side of the original linear system 2032 2033 Output Parameters: 2034 . fetidp_flux_rhs - the right-hand side for the FETI-DP linear system 2035 2036 Level: developer 2037 2038 Notes: 2039 2040 .seealso: PCBDDC, PCBDDCCreateFETIDPOperators, PCBDDCMatFETIDPGetSolution 2041 @*/ 2042 PetscErrorCode PCBDDCMatFETIDPGetRHS(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 2043 { 2044 FETIDPMat_ctx mat_ctx; 2045 PetscErrorCode ierr; 2046 2047 PetscFunctionBegin; 2048 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2049 ierr = PetscTryMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetRHS_C",(Mat,Vec,Vec),(fetidp_mat,standard_rhs,fetidp_flux_rhs));CHKERRQ(ierr); 2050 PetscFunctionReturn(0); 2051 } 2052 /* -------------------------------------------------------------------------- */ 2053 2054 #undef __FUNCT__ 2055 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution_BDDC" 2056 static PetscErrorCode PCBDDCMatFETIDPGetSolution_BDDC(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 2057 { 2058 FETIDPMat_ctx mat_ctx; 2059 PC_IS* pcis; 2060 PC_BDDC* pcbddc; 2061 PetscErrorCode ierr; 2062 2063 PetscFunctionBegin; 2064 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2065 pcis = (PC_IS*)mat_ctx->pc->data; 2066 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 2067 2068 /* apply B_delta^T */ 2069 ierr = VecScatterBegin(mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2070 ierr = VecScatterEnd (mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2071 ierr = MatMultTranspose(mat_ctx->B_delta,mat_ctx->lambda_local,pcis->vec1_B);CHKERRQ(ierr); 2072 /* compute rhs for BDDC application */ 2073 ierr = VecAYPX(pcis->vec1_B,-1.0,mat_ctx->temp_solution_B);CHKERRQ(ierr); 2074 if (pcbddc->switch_static) { 2075 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 2076 } 2077 /* apply BDDC */ 2078 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 2079 /* put values into standard global vector */ 2080 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2081 ierr = VecScatterEnd (pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2082 if (!pcbddc->switch_static) { 2083 /* compute values into the interior if solved for the partially subassembled Schur complement */ 2084 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec1_D);CHKERRQ(ierr); 2085 ierr = VecAXPY(mat_ctx->temp_solution_D,-1.0,pcis->vec1_D);CHKERRQ(ierr); 2086 ierr = KSPSolve(pcbddc->ksp_D,mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 2087 } 2088 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2089 ierr = VecScatterEnd (pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2090 /* final change of basis if needed 2091 Is also sums the dirichlet part removed during RHS assembling */ 2092 ierr = PCPostSolve_BDDC(mat_ctx->pc,NULL,NULL,standard_sol);CHKERRQ(ierr); 2093 PetscFunctionReturn(0); 2094 } 2095 2096 #undef __FUNCT__ 2097 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution" 2098 /*@ 2099 PCBDDCMatFETIDPGetSolution - Compute the physical solution using the solution of the FETI-DP linear system 2100 2101 Collective 2102 2103 Input Parameters: 2104 + fetidp_mat - the FETI-DP matrix obtained by a call to PCBDDCCreateFETIDPOperators 2105 - fetidp_flux_sol - the solution of the FETI-DP linear system 2106 2107 Output Parameters: 2108 . standard_sol - the solution defined on the physical domain 2109 2110 Level: developer 2111 2112 Notes: 2113 2114 .seealso: PCBDDC, PCBDDCCreateFETIDPOperators, PCBDDCMatFETIDPGetRHS 2115 @*/ 2116 PetscErrorCode PCBDDCMatFETIDPGetSolution(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 2117 { 2118 FETIDPMat_ctx mat_ctx; 2119 PetscErrorCode ierr; 2120 2121 PetscFunctionBegin; 2122 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2123 ierr = PetscTryMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetSolution_C",(Mat,Vec,Vec),(fetidp_mat,fetidp_flux_sol,standard_sol));CHKERRQ(ierr); 2124 PetscFunctionReturn(0); 2125 } 2126 /* -------------------------------------------------------------------------- */ 2127 2128 extern PetscErrorCode FETIDPMatMult(Mat,Vec,Vec); 2129 extern PetscErrorCode FETIDPMatMultTranspose(Mat,Vec,Vec); 2130 extern PetscErrorCode PCBDDCDestroyFETIDPMat(Mat); 2131 extern PetscErrorCode FETIDPPCApply(PC,Vec,Vec); 2132 extern PetscErrorCode FETIDPPCApplyTranspose(PC,Vec,Vec); 2133 extern PetscErrorCode PCBDDCDestroyFETIDPPC(PC); 2134 2135 #undef __FUNCT__ 2136 #define __FUNCT__ "PCBDDCCreateFETIDPOperators_BDDC" 2137 static PetscErrorCode PCBDDCCreateFETIDPOperators_BDDC(PC pc, Mat *fetidp_mat, PC *fetidp_pc) 2138 { 2139 2140 FETIDPMat_ctx fetidpmat_ctx; 2141 Mat newmat; 2142 FETIDPPC_ctx fetidppc_ctx; 2143 PC newpc; 2144 MPI_Comm comm; 2145 PetscErrorCode ierr; 2146 2147 PetscFunctionBegin; 2148 ierr = PetscObjectGetComm((PetscObject)pc,&comm);CHKERRQ(ierr); 2149 /* FETIDP linear matrix */ 2150 ierr = PCBDDCCreateFETIDPMatContext(pc,&fetidpmat_ctx);CHKERRQ(ierr); 2151 ierr = PCBDDCSetupFETIDPMatContext(fetidpmat_ctx);CHKERRQ(ierr); 2152 ierr = MatCreateShell(comm,PETSC_DECIDE,PETSC_DECIDE,fetidpmat_ctx->n_lambda,fetidpmat_ctx->n_lambda,fetidpmat_ctx,&newmat);CHKERRQ(ierr); 2153 ierr = MatShellSetOperation(newmat,MATOP_MULT,(void (*)(void))FETIDPMatMult);CHKERRQ(ierr); 2154 ierr = MatShellSetOperation(newmat,MATOP_MULT_TRANSPOSE,(void (*)(void))FETIDPMatMultTranspose);CHKERRQ(ierr); 2155 ierr = MatShellSetOperation(newmat,MATOP_DESTROY,(void (*)(void))PCBDDCDestroyFETIDPMat);CHKERRQ(ierr); 2156 ierr = MatSetUp(newmat);CHKERRQ(ierr); 2157 /* FETIDP preconditioner */ 2158 ierr = PCBDDCCreateFETIDPPCContext(pc,&fetidppc_ctx);CHKERRQ(ierr); 2159 ierr = PCBDDCSetupFETIDPPCContext(newmat,fetidppc_ctx);CHKERRQ(ierr); 2160 ierr = PCCreate(comm,&newpc);CHKERRQ(ierr); 2161 ierr = PCSetType(newpc,PCSHELL);CHKERRQ(ierr); 2162 ierr = PCShellSetContext(newpc,fetidppc_ctx);CHKERRQ(ierr); 2163 ierr = PCShellSetApply(newpc,FETIDPPCApply);CHKERRQ(ierr); 2164 ierr = PCShellSetApplyTranspose(newpc,FETIDPPCApplyTranspose);CHKERRQ(ierr); 2165 ierr = PCShellSetDestroy(newpc,PCBDDCDestroyFETIDPPC);CHKERRQ(ierr); 2166 ierr = PCSetOperators(newpc,newmat,newmat);CHKERRQ(ierr); 2167 ierr = PCSetUp(newpc);CHKERRQ(ierr); 2168 /* return pointers for objects created */ 2169 *fetidp_mat=newmat; 2170 *fetidp_pc=newpc; 2171 PetscFunctionReturn(0); 2172 } 2173 2174 #undef __FUNCT__ 2175 #define __FUNCT__ "PCBDDCCreateFETIDPOperators" 2176 /*@ 2177 PCBDDCCreateFETIDPOperators - Create FETI-DP operators 2178 2179 Collective 2180 2181 Input Parameters: 2182 . pc - the BDDC preconditioning context (setup should have been called before) 2183 2184 Output Parameters: 2185 + fetidp_mat - shell FETI-DP matrix object 2186 - fetidp_pc - shell Dirichlet preconditioner for FETI-DP matrix 2187 2188 Options Database Keys: 2189 . -fetidp_fullyredundant <false> - use or not a fully redundant set of Lagrange multipliers 2190 2191 Level: developer 2192 2193 Notes: 2194 Currently the only operations provided for FETI-DP matrix are MatMult and MatMultTranspose 2195 2196 .seealso: PCBDDC, PCBDDCMatFETIDPGetRHS, PCBDDCMatFETIDPGetSolution 2197 @*/ 2198 PetscErrorCode PCBDDCCreateFETIDPOperators(PC pc, Mat *fetidp_mat, PC *fetidp_pc) 2199 { 2200 PetscErrorCode ierr; 2201 2202 PetscFunctionBegin; 2203 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 2204 if (pc->setupcalled) { 2205 ierr = PetscUseMethod(pc,"PCBDDCCreateFETIDPOperators_C",(PC,Mat*,PC*),(pc,fetidp_mat,fetidp_pc));CHKERRQ(ierr); 2206 } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"You must call PCSetup_BDDC() first \n"); 2207 PetscFunctionReturn(0); 2208 } 2209 /* -------------------------------------------------------------------------- */ 2210 /*MC 2211 PCBDDC - Balancing Domain Decomposition by Constraints. 2212 2213 An implementation of the BDDC preconditioner based on 2214 2215 .vb 2216 [1] C. R. Dohrmann. "An approximate BDDC preconditioner", Numerical Linear Algebra with Applications Volume 14, Issue 2, pages 149-168, March 2007 2217 [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 2218 [3] J. Mandel, B. Sousedik, C. R. Dohrmann. "Multispace and Multilevel BDDC", http://arxiv.org/abs/0712.3977 2219 [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 2220 .ve 2221 2222 The matrix to be preconditioned (Pmat) must be of type MATIS. 2223 2224 Currently works with MATIS matrices with local matrices of type MATSEQAIJ, MATSEQBAIJ or MATSEQSBAIJ, either with real or complex numbers. 2225 2226 It also works with unsymmetric and indefinite problems. 2227 2228 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. 2229 2230 Approximate local solvers are automatically adapted for singular linear problems (see [1]) if the user has provided the nullspace using PCBDDCSetNullSpace() 2231 2232 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() 2233 Additional information on dofs can be provided by using PCBDDCSetDofsSplitting(), PCBDDCSetDirichletBoundaries(), PCBDDCSetNeumannBoundaries(), and PCBDDCSetPrimalVerticesIS() and their local counterparts. 2234 2235 Constraints can be customized by attaching a MatNullSpace object to the MATIS matrix via MatSetNearNullSpace(). Non-singular modes are retained via SVD. 2236 2237 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. 2238 User defined change of basis can be passed to PCBDDC by using PCBDDCSetChangeOfBasisMat() 2239 2240 The PETSc implementation also supports multilevel BDDC [3]. Coarse grids are partitioned using a MatPartitioning object. 2241 2242 Adaptive selection of primal constraints [4] is supported for SPD systems with high-contrast in the coefficients if MUMPS or MKL_PARDISO are present. Future versions of the code will also consider using PASTIX. 2243 2244 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. 2245 Deluxe scaling is not supported yet for FETI-DP. 2246 2247 Options Database Keys (some of them, run with -h for a complete list): 2248 2249 . -pc_bddc_use_vertices <true> - use or not vertices in primal space 2250 . -pc_bddc_use_edges <true> - use or not edges in primal space 2251 . -pc_bddc_use_faces <false> - use or not faces in primal space 2252 . -pc_bddc_symmetric <true> - symmetric computation of primal basis functions. Specify false for unsymmetric problems 2253 . -pc_bddc_use_change_of_basis <false> - use change of basis approach (on edges only) 2254 . -pc_bddc_use_change_on_faces <false> - use change of basis approach on faces if change of basis has been requested 2255 . -pc_bddc_switch_static <false> - switches from M_2 (default) to M_3 operator (see reference article [1]) 2256 . -pc_bddc_levels <0> - maximum number of levels for multilevel 2257 . -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) 2258 . -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) 2259 . -pc_bddc_use_deluxe_scaling <false> - use deluxe scaling 2260 . -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) 2261 . -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 or MKL_PARDISO installed) 2262 - -pc_bddc_check_level <0> - set verbosity level of debugging output 2263 2264 Options for Dirichlet, Neumann or coarse solver can be set with 2265 .vb 2266 -pc_bddc_dirichlet_ 2267 -pc_bddc_neumann_ 2268 -pc_bddc_coarse_ 2269 .ve 2270 e.g -pc_bddc_dirichlet_ksp_type richardson -pc_bddc_dirichlet_pc_type gamg. PCBDDC uses by default KPSPREONLY and PCLU. 2271 2272 When using a multilevel approach, solvers' options at the N-th level (N > 1) can be specified as 2273 .vb 2274 -pc_bddc_dirichlet_lN_ 2275 -pc_bddc_neumann_lN_ 2276 -pc_bddc_coarse_lN_ 2277 .ve 2278 Note that level number ranges from the finest (0) to the coarsest (N). 2279 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. 2280 .vb 2281 -pc_bddc_coarse_pc_bddc_adaptive_threshold 5 -pc_bddc_coarse_l1_pc_bddc_redistribute 3 2282 .ve 2283 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 2284 2285 Level: intermediate 2286 2287 Developer notes: 2288 2289 Contributed by Stefano Zampini 2290 2291 .seealso: PCCreate(), PCSetType(), PCType (for list of available types), PC, MATIS 2292 M*/ 2293 2294 #undef __FUNCT__ 2295 #define __FUNCT__ "PCCreate_BDDC" 2296 PETSC_EXTERN PetscErrorCode PCCreate_BDDC(PC pc) 2297 { 2298 PetscErrorCode ierr; 2299 PC_BDDC *pcbddc; 2300 2301 PetscFunctionBegin; 2302 /* Creates the private data structure for this preconditioner and attach it to the PC object. */ 2303 ierr = PetscNewLog(pc,&pcbddc);CHKERRQ(ierr); 2304 pc->data = (void*)pcbddc; 2305 2306 /* create PCIS data structure */ 2307 ierr = PCISCreate(pc);CHKERRQ(ierr); 2308 2309 /* BDDC customization */ 2310 pcbddc->use_local_adj = PETSC_TRUE; 2311 pcbddc->use_vertices = PETSC_TRUE; 2312 pcbddc->use_edges = PETSC_TRUE; 2313 pcbddc->use_faces = PETSC_FALSE; 2314 pcbddc->use_change_of_basis = PETSC_FALSE; 2315 pcbddc->use_change_on_faces = PETSC_FALSE; 2316 pcbddc->switch_static = PETSC_FALSE; 2317 pcbddc->use_nnsp_true = PETSC_FALSE; 2318 pcbddc->use_qr_single = PETSC_FALSE; 2319 pcbddc->symmetric_primal = PETSC_TRUE; 2320 pcbddc->benign_saddle_point = PETSC_FALSE; 2321 pcbddc->vertex_size = 1; 2322 pcbddc->dbg_flag = 0; 2323 /* private */ 2324 pcbddc->local_primal_size = 0; 2325 pcbddc->local_primal_size_cc = 0; 2326 pcbddc->local_primal_ref_node = 0; 2327 pcbddc->local_primal_ref_mult = 0; 2328 pcbddc->n_vertices = 0; 2329 pcbddc->primal_indices_local_idxs = 0; 2330 pcbddc->recompute_topography = PETSC_FALSE; 2331 pcbddc->coarse_size = -1; 2332 pcbddc->new_primal_space = PETSC_FALSE; 2333 pcbddc->new_primal_space_local = PETSC_FALSE; 2334 pcbddc->global_primal_indices = 0; 2335 pcbddc->onearnullspace = 0; 2336 pcbddc->onearnullvecs_state = 0; 2337 pcbddc->user_primal_vertices = 0; 2338 pcbddc->user_primal_vertices_local = 0; 2339 pcbddc->NullSpace = 0; 2340 pcbddc->temp_solution = 0; 2341 pcbddc->original_rhs = 0; 2342 pcbddc->local_mat = 0; 2343 pcbddc->ChangeOfBasisMatrix = 0; 2344 pcbddc->user_ChangeOfBasisMatrix = 0; 2345 pcbddc->coarse_vec = 0; 2346 pcbddc->coarse_ksp = 0; 2347 pcbddc->coarse_phi_B = 0; 2348 pcbddc->coarse_phi_D = 0; 2349 pcbddc->coarse_psi_B = 0; 2350 pcbddc->coarse_psi_D = 0; 2351 pcbddc->vec1_P = 0; 2352 pcbddc->vec1_R = 0; 2353 pcbddc->vec2_R = 0; 2354 pcbddc->local_auxmat1 = 0; 2355 pcbddc->local_auxmat2 = 0; 2356 pcbddc->R_to_B = 0; 2357 pcbddc->R_to_D = 0; 2358 pcbddc->ksp_D = 0; 2359 pcbddc->ksp_R = 0; 2360 pcbddc->NeumannBoundaries = 0; 2361 pcbddc->NeumannBoundariesLocal = 0; 2362 pcbddc->DirichletBoundaries = 0; 2363 pcbddc->DirichletBoundariesLocal = 0; 2364 pcbddc->user_provided_isfordofs = PETSC_FALSE; 2365 pcbddc->n_ISForDofs = 0; 2366 pcbddc->n_ISForDofsLocal = 0; 2367 pcbddc->ISForDofs = 0; 2368 pcbddc->ISForDofsLocal = 0; 2369 pcbddc->ConstraintMatrix = 0; 2370 pcbddc->use_exact_dirichlet_trick = PETSC_TRUE; 2371 pcbddc->coarse_loc_to_glob = 0; 2372 pcbddc->coarsening_ratio = 8; 2373 pcbddc->coarse_adj_red = 0; 2374 pcbddc->current_level = 0; 2375 pcbddc->max_levels = 0; 2376 pcbddc->use_coarse_estimates = PETSC_FALSE; 2377 pcbddc->redistribute_coarse = 0; 2378 pcbddc->coarse_subassembling = 0; 2379 pcbddc->coarse_subassembling_init = 0; 2380 pcbddc->detect_disconnected = PETSC_FALSE; 2381 pcbddc->n_local_subs = 0; 2382 pcbddc->local_subs = NULL; 2383 2384 /* benign subspace trick */ 2385 pcbddc->benign_change = 0; 2386 pcbddc->benign_vec = 0; 2387 pcbddc->benign_original_mat = 0; 2388 pcbddc->benign_sf = 0; 2389 pcbddc->benign_B0 = 0; 2390 pcbddc->benign_n = 0; 2391 pcbddc->benign_p0 = NULL; 2392 pcbddc->benign_p0_lidx = NULL; 2393 pcbddc->benign_p0_gidx = NULL; 2394 pcbddc->benign_null = PETSC_FALSE; 2395 2396 /* create local graph structure */ 2397 ierr = PCBDDCGraphCreate(&pcbddc->mat_graph);CHKERRQ(ierr); 2398 2399 /* scaling */ 2400 pcbddc->work_scaling = 0; 2401 pcbddc->use_deluxe_scaling = PETSC_FALSE; 2402 pcbddc->faster_deluxe = PETSC_FALSE; 2403 2404 /* create sub schurs structure */ 2405 ierr = PCBDDCSubSchursCreate(&pcbddc->sub_schurs);CHKERRQ(ierr); 2406 pcbddc->sub_schurs_rebuild = PETSC_FALSE; 2407 pcbddc->sub_schurs_layers = -1; 2408 pcbddc->sub_schurs_use_useradj = PETSC_FALSE; 2409 2410 pcbddc->computed_rowadj = PETSC_FALSE; 2411 2412 /* adaptivity */ 2413 pcbddc->adaptive_threshold = 0.0; 2414 pcbddc->adaptive_nmax = 0; 2415 pcbddc->adaptive_nmin = 0; 2416 2417 /* function pointers */ 2418 pc->ops->apply = PCApply_BDDC; 2419 pc->ops->applytranspose = PCApplyTranspose_BDDC; 2420 pc->ops->setup = PCSetUp_BDDC; 2421 pc->ops->destroy = PCDestroy_BDDC; 2422 pc->ops->setfromoptions = PCSetFromOptions_BDDC; 2423 pc->ops->view = PCView_BDDC; 2424 pc->ops->applyrichardson = 0; 2425 pc->ops->applysymmetricleft = 0; 2426 pc->ops->applysymmetricright = 0; 2427 pc->ops->presolve = PCPreSolve_BDDC; 2428 pc->ops->postsolve = PCPostSolve_BDDC; 2429 2430 /* composing function */ 2431 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",PCBDDCSetChangeOfBasisMat_BDDC);CHKERRQ(ierr); 2432 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",PCBDDCSetPrimalVerticesLocalIS_BDDC);CHKERRQ(ierr); 2433 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesIS_C",PCBDDCSetPrimalVerticesIS_BDDC);CHKERRQ(ierr); 2434 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",PCBDDCSetCoarseningRatio_BDDC);CHKERRQ(ierr); 2435 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",PCBDDCSetLevel_BDDC);CHKERRQ(ierr); 2436 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",PCBDDCSetUseExactDirichlet_BDDC);CHKERRQ(ierr); 2437 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",PCBDDCSetLevels_BDDC);CHKERRQ(ierr); 2438 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNullSpace_C",PCBDDCSetNullSpace_BDDC);CHKERRQ(ierr); 2439 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",PCBDDCSetDirichletBoundaries_BDDC);CHKERRQ(ierr); 2440 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",PCBDDCSetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 2441 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",PCBDDCSetNeumannBoundaries_BDDC);CHKERRQ(ierr); 2442 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",PCBDDCSetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 2443 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",PCBDDCGetDirichletBoundaries_BDDC);CHKERRQ(ierr); 2444 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",PCBDDCGetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 2445 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",PCBDDCGetNeumannBoundaries_BDDC);CHKERRQ(ierr); 2446 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",PCBDDCGetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 2447 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",PCBDDCSetDofsSplitting_BDDC);CHKERRQ(ierr); 2448 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",PCBDDCSetDofsSplittingLocal_BDDC);CHKERRQ(ierr); 2449 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",PCBDDCSetLocalAdjacencyGraph_BDDC);CHKERRQ(ierr); 2450 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",PCBDDCCreateFETIDPOperators_BDDC);CHKERRQ(ierr); 2451 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",PCBDDCMatFETIDPGetRHS_BDDC);CHKERRQ(ierr); 2452 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",PCBDDCMatFETIDPGetSolution_BDDC);CHKERRQ(ierr); 2453 PetscFunctionReturn(0); 2454 } 2455 2456