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 MATIS related operations contained in BDDC code 18 - Provide general case for subassembling 19 20 */ 21 22 #include <../src/ksp/pc/impls/bddc/bddc.h> /*I "petscpc.h" I*/ /* includes for fortran wrappers */ 23 #include <../src/ksp/pc/impls/bddc/bddcprivate.h> 24 #include <petscblaslapack.h> 25 26 /* temporarily declare it */ 27 PetscErrorCode PCApply_BDDC(PC,Vec,Vec); 28 29 #undef __FUNCT__ 30 #define __FUNCT__ "PCSetFromOptions_BDDC" 31 PetscErrorCode PCSetFromOptions_BDDC(PetscOptionItems *PetscOptionsObject,PC pc) 32 { 33 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 34 PetscErrorCode ierr; 35 36 PetscFunctionBegin; 37 ierr = PetscOptionsHead(PetscOptionsObject,"BDDC options");CHKERRQ(ierr); 38 /* Verbose debugging */ 39 ierr = PetscOptionsInt("-pc_bddc_check_level","Verbose output for PCBDDC (intended for debug)","none",pcbddc->dbg_flag,&pcbddc->dbg_flag,NULL);CHKERRQ(ierr); 40 /* Approximate solvers */ 41 ierr = PetscOptionsBool("-pc_bddc_dirichlet_approximate","Inform PCBDDC that we are using approximate Dirichlet solvers","none",pcbddc->NullSpace_corr[0],&pcbddc->NullSpace_corr[0],NULL);CHKERRQ(ierr); 42 ierr = PetscOptionsBool("-pc_bddc_dirichlet_approximate_scale","Inform PCBDDC that we need to scale the Dirichlet solve","none",pcbddc->NullSpace_corr[1],&pcbddc->NullSpace_corr[1],NULL);CHKERRQ(ierr); 43 ierr = PetscOptionsBool("-pc_bddc_neumann_approximate","Inform PCBDDC that we are using approximate Neumann solvers","none",pcbddc->NullSpace_corr[2],&pcbddc->NullSpace_corr[2],NULL);CHKERRQ(ierr); 44 ierr = PetscOptionsBool("-pc_bddc_neumann_approximate_scale","Inform PCBDDC that we need to scale the Neumann solve","none",pcbddc->NullSpace_corr[3],&pcbddc->NullSpace_corr[3],NULL);CHKERRQ(ierr); 45 /* Primal space customization */ 46 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); 47 ierr = PetscOptionsInt("-pc_bddc_graph_maxcount","Maximum number of shared subdomains for a connected component","none",pcbddc->graphmaxcount,&pcbddc->graphmaxcount,NULL);CHKERRQ(ierr); 48 ierr = PetscOptionsBool("-pc_bddc_use_vertices","Use or not corner dofs in coarse space","none",pcbddc->use_vertices,&pcbddc->use_vertices,NULL);CHKERRQ(ierr); 49 ierr = PetscOptionsBool("-pc_bddc_use_edges","Use or not edge constraints in coarse space","none",pcbddc->use_edges,&pcbddc->use_edges,NULL);CHKERRQ(ierr); 50 ierr = PetscOptionsBool("-pc_bddc_use_faces","Use or not face constraints in coarse space","none",pcbddc->use_faces,&pcbddc->use_faces,NULL);CHKERRQ(ierr); 51 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); 52 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); 53 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); 54 /* Change of basis */ 55 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); 56 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); 57 if (!pcbddc->use_change_of_basis) { 58 pcbddc->use_change_on_faces = PETSC_FALSE; 59 } 60 /* Switch between M_2 (default) and M_3 preconditioners (as defined by C. Dohrmann in the ref. article) */ 61 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); 62 ierr = PetscOptionsInt("-pc_bddc_coarse_eqs_per_proc","Number of equations per process for coarse problem redistribution (significant only at the coarsest level)","none",pcbddc->coarse_eqs_per_proc,&pcbddc->coarse_eqs_per_proc,NULL);CHKERRQ(ierr); 63 ierr = PetscOptionsInt("-pc_bddc_coarsening_ratio","Set coarsening ratio used in multilevel coarsening","none",pcbddc->coarsening_ratio,&pcbddc->coarsening_ratio,NULL);CHKERRQ(ierr); 64 ierr = PetscOptionsInt("-pc_bddc_levels","Set maximum number of levels for multilevel","none",pcbddc->max_levels,&pcbddc->max_levels,NULL);CHKERRQ(ierr); 65 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); 66 ierr = PetscOptionsBool("-pc_bddc_use_deluxe_scaling","Use deluxe scaling for BDDC","none",pcbddc->use_deluxe_scaling,&pcbddc->use_deluxe_scaling,NULL);CHKERRQ(ierr); 67 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); 68 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); 69 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); 70 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); 71 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); 72 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); 73 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); 74 ierr = PetscOptionsInt("-pc_bddc_adaptive_nmin","Minimum number of constraints per connected components","none",pcbddc->adaptive_nmin,&pcbddc->adaptive_nmin,NULL);CHKERRQ(ierr); 75 ierr = PetscOptionsInt("-pc_bddc_adaptive_nmax","Maximum number of constraints per connected components","none",pcbddc->adaptive_nmax,&pcbddc->adaptive_nmax,NULL);CHKERRQ(ierr); 76 ierr = PetscOptionsBool("-pc_bddc_symmetric","Symmetric computation of primal basis functions","none",pcbddc->symmetric_primal,&pcbddc->symmetric_primal,NULL);CHKERRQ(ierr); 77 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); 78 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); 79 ierr = PetscOptionsBool("-pc_bddc_benign_change","Compute the pressure change of basis explicitly","none",pcbddc->benign_change_explicit,&pcbddc->benign_change_explicit,NULL);CHKERRQ(ierr); 80 ierr = PetscOptionsBool("-pc_bddc_benign_compute_correction","Compute the benign correction during PreSolve","none",pcbddc->benign_compute_correction,&pcbddc->benign_compute_correction,NULL);CHKERRQ(ierr); 81 ierr = PetscOptionsBool("-pc_bddc_nonetflux","Automatic computation of no-net-flux quadrature weights","none",pcbddc->compute_nonetflux,&pcbddc->compute_nonetflux,NULL);CHKERRQ(ierr); 82 ierr = PetscOptionsBool("-pc_bddc_detect_disconnected","Detects disconnected subdomains","none",pcbddc->detect_disconnected,&pcbddc->detect_disconnected,NULL);CHKERRQ(ierr); 83 ierr = PetscOptionsBool("-pc_bddc_eliminate_dirichlet","Whether or not we want to eliminate dirichlet dofs during presolve","none",pcbddc->eliminate_dirdofs,&pcbddc->eliminate_dirdofs,NULL);CHKERRQ(ierr); 84 ierr = PetscOptionsTail();CHKERRQ(ierr); 85 PetscFunctionReturn(0); 86 } 87 88 #undef __FUNCT__ 89 #define __FUNCT__ "PCView_BDDC" 90 static PetscErrorCode PCView_BDDC(PC pc,PetscViewer viewer) 91 { 92 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 93 PC_IS *pcis = (PC_IS*)pc->data; 94 PetscErrorCode ierr; 95 PetscBool isascii,isstring; 96 PetscSubcomm subcomm; 97 PetscViewer subviewer; 98 99 PetscFunctionBegin; 100 ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&isascii);CHKERRQ(ierr); 101 ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERSTRING,&isstring);CHKERRQ(ierr); 102 /* Nothing printed for the String viewer */ 103 /* ASCII viewer */ 104 if (isascii) { 105 PetscMPIInt color,rank,size; 106 PetscInt64 loc[6],gsum[5],gmax[5],gmin[5],totbenign; 107 PetscScalar interface_size; 108 PetscReal ratio1=0.,ratio2=0.; 109 Vec counter; 110 111 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use verbose output: %d\n",pcbddc->dbg_flag);CHKERRQ(ierr); 112 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use user-defined CSR: %d\n",!!pcbddc->mat_graph->nvtxs_csr);CHKERRQ(ierr); 113 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use local mat graph: %d\n",pcbddc->use_local_adj);CHKERRQ(ierr); 114 if (pcbddc->mat_graph->twodim) { 115 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Connectivity graph topological dimension: 2\n");CHKERRQ(ierr); 116 } else { 117 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Connectivity graph topological dimension: 3\n");CHKERRQ(ierr); 118 } 119 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use vertices: %d (vertex size %d)\n",pcbddc->use_vertices,pcbddc->vertex_size);CHKERRQ(ierr); 120 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use edges: %d\n",pcbddc->use_edges);CHKERRQ(ierr); 121 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use faces: %d\n",pcbddc->use_faces);CHKERRQ(ierr); 122 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use true near null space: %d\n",pcbddc->use_nnsp_true);CHKERRQ(ierr); 123 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use QR for single constraints on cc: %d\n",pcbddc->use_qr_single);CHKERRQ(ierr); 124 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use change of basis on local edge nodes: %d\n",pcbddc->use_change_of_basis);CHKERRQ(ierr); 125 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use change of basis on local face nodes: %d\n",pcbddc->use_change_on_faces);CHKERRQ(ierr); 126 ierr = PetscViewerASCIIPrintf(viewer," BDDC: User defined change of basis matrix: %d\n",!!pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 127 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Has change of basis matrix: %d\n",!!pcbddc->ChangeOfBasisMatrix);CHKERRQ(ierr); 128 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Eliminate dirichlet boundary dofs: %d\n",pcbddc->eliminate_dirdofs);CHKERRQ(ierr); 129 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Switch on static condensation ops around the interface preconditioner: %d\n",pcbddc->switch_static);CHKERRQ(ierr); 130 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use exact dirichlet trick: %d\n",pcbddc->use_exact_dirichlet_trick);CHKERRQ(ierr); 131 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Multilevel max levels: %d\n",pcbddc->max_levels);CHKERRQ(ierr); 132 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Multilevel coarsening ratio: %d\n",pcbddc->coarsening_ratio);CHKERRQ(ierr); 133 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use estimated eigs for coarse problem: %d\n",pcbddc->use_coarse_estimates);CHKERRQ(ierr); 134 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use deluxe scaling: %d\n",pcbddc->use_deluxe_scaling);CHKERRQ(ierr); 135 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use deluxe zerorows: %d\n",pcbddc->deluxe_zerorows);CHKERRQ(ierr); 136 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Rebuild interface graph for Schur principal minors: %d\n",pcbddc->sub_schurs_rebuild);CHKERRQ(ierr); 137 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Number of dofs' layers for the computation of principal minors: %d\n",pcbddc->sub_schurs_layers);CHKERRQ(ierr); 138 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use user CSR graph to compute successive layers: %d\n",pcbddc->sub_schurs_use_useradj);CHKERRQ(ierr); 139 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Adaptive constraint selection threshold (active %d, userdefined %d): %g\n",pcbddc->adaptive_threshold,pcbddc->adaptive_selection,pcbddc->adaptive_userdefined);CHKERRQ(ierr); 140 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Min constraints / connected component: %d\n",pcbddc->adaptive_nmin);CHKERRQ(ierr); 141 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Max constraints / connected component: %d\n",pcbddc->adaptive_nmax);CHKERRQ(ierr); 142 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Invert exact Schur complement for adaptive selection: %d\n",pcbddc->sub_schurs_exact_schur);CHKERRQ(ierr); 143 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Symmetric computation of primal basis functions: %d\n",pcbddc->symmetric_primal);CHKERRQ(ierr); 144 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Num. Procs. to map coarse adjacency list: %d\n",pcbddc->coarse_adj_red);CHKERRQ(ierr); 145 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Coarse eqs per proc (significant at the coarsest level): %d\n",pcbddc->coarse_eqs_per_proc);CHKERRQ(ierr); 146 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Detect disconnected: %d\n",pcbddc->detect_disconnected);CHKERRQ(ierr); 147 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Benign subspace trick: %d (change explicit %d)\n",pcbddc->benign_saddle_point,pcbddc->benign_change_explicit);CHKERRQ(ierr); 148 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Benign subspace trick is active: %d\n",pcbddc->benign_have_null);CHKERRQ(ierr); 149 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Algebraic computation of no-net-flux %d\n",pcbddc->compute_nonetflux);CHKERRQ(ierr); 150 151 /* compute some numbers on the domain decomposition */ 152 ierr = VecSet(pcis->vec1_B,1.0);CHKERRQ(ierr); 153 ierr = MatCreateVecs(pc->pmat,&counter,0);CHKERRQ(ierr); 154 ierr = VecSet(counter,0.0);CHKERRQ(ierr); 155 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,counter,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 156 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,counter,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 157 ierr = VecSum(counter,&interface_size);CHKERRQ(ierr); 158 ierr = VecDestroy(&counter);CHKERRQ(ierr); 159 gsum[0] = 1; 160 gsum[1] = gsum[2] = gsum[3] = gsum[4] = 0; 161 loc[0] = !!pcis->n; 162 loc[1] = pcis->n - pcis->n_B; 163 loc[2] = pcis->n_B; 164 loc[3] = pcbddc->local_primal_size; 165 loc[4] = pcis->n; 166 loc[5] = pcbddc->benign_n; 167 ierr = MPI_Reduce(loc,gsum,5,MPIU_INT64,MPI_SUM,0,PetscObjectComm((PetscObject)pc));CHKERRQ(ierr); 168 if (!loc[0]) loc[1] = loc[2] = loc[3] = loc[4] = -1; 169 ierr = MPI_Reduce(loc,gmax,5,MPIU_INT64,MPI_MAX,0,PetscObjectComm((PetscObject)pc));CHKERRQ(ierr); 170 if (!loc[0]) loc[1] = loc[2] = loc[3] = loc[4] = PETSC_MAX_INT; 171 ierr = MPI_Reduce(loc,gmin,5,MPIU_INT64,MPI_MIN,0,PetscObjectComm((PetscObject)pc));CHKERRQ(ierr); 172 ierr = MPI_Reduce(&loc[5],&totbenign,1,MPIU_INT64,MPI_SUM,0,PetscObjectComm((PetscObject)pc));CHKERRQ(ierr); 173 if (pcbddc->coarse_size) { 174 ratio1 = pc->pmat->rmap->N/(1.*pcbddc->coarse_size); 175 ratio2 = PetscRealPart(interface_size)/pcbddc->coarse_size; 176 } 177 ierr = PetscViewerASCIIPrintf(viewer," BDDC: ********************************** STATISTICS AT LEVEL %d **********************************\n",pcbddc->current_level);CHKERRQ(ierr); 178 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Global dofs sizes: all %d interface %d coarse %d\n",pc->pmat->rmap->N,(PetscInt)PetscRealPart(interface_size),pcbddc->coarse_size);CHKERRQ(ierr); 179 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Coarsening ratios: all/coarse %d interface/coarse %d\n",(PetscInt)ratio1,(PetscInt)ratio2);CHKERRQ(ierr); 180 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Active processes : %d\n",(PetscInt)gsum[0]);CHKERRQ(ierr); 181 if (pcbddc->benign_have_null) { 182 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Benign subs : %d\n",(PetscInt)totbenign);CHKERRQ(ierr); 183 } 184 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Dofs type :\tMIN\tMAX\tMEAN\n",(PetscInt)gmin[1],(PetscInt)gmax[1],(PetscInt)(gsum[1]/gsum[0]));CHKERRQ(ierr); 185 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Interior dofs :\t%d\t%d\t%d\n",(PetscInt)gmin[1],(PetscInt)gmax[1],(PetscInt)(gsum[1]/gsum[0]));CHKERRQ(ierr); 186 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Interface dofs :\t%d\t%d\t%d\n",(PetscInt)gmin[2],(PetscInt)gmax[2],(PetscInt)(gsum[2]/gsum[0]));CHKERRQ(ierr); 187 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Primal dofs :\t%d\t%d\t%d\n",(PetscInt)gmin[3],(PetscInt)gmax[3],(PetscInt)(gsum[3]/gsum[0]));CHKERRQ(ierr); 188 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Local dofs :\t%d\t%d\t%d\n",(PetscInt)gmin[4],(PetscInt)gmax[4],(PetscInt)(gsum[4]/gsum[0]));CHKERRQ(ierr); 189 ierr = PetscViewerASCIIPrintf(viewer," BDDC: ********************************** COARSE PROBLEM DETAILS *********************************\n",pcbddc->current_level);CHKERRQ(ierr); 190 ierr = PetscViewerFlush(viewer);CHKERRQ(ierr); 191 192 /* the coarse problem can be handled with a different communicator */ 193 if (pcbddc->coarse_ksp) color = 1; 194 else color = 0; 195 ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)pc),&rank);CHKERRQ(ierr); 196 ierr = MPI_Comm_size(PetscObjectComm((PetscObject)pc),&size);CHKERRQ(ierr); 197 ierr = PetscSubcommCreate(PetscObjectComm((PetscObject)pc),&subcomm);CHKERRQ(ierr); 198 ierr = PetscSubcommSetNumber(subcomm,PetscMin(size,2));CHKERRQ(ierr); 199 ierr = PetscSubcommSetTypeGeneral(subcomm,color,rank);CHKERRQ(ierr); 200 ierr = PetscViewerGetSubViewer(viewer,PetscSubcommChild(subcomm),&subviewer);CHKERRQ(ierr); 201 if (color == 1) { 202 ierr = KSPView(pcbddc->coarse_ksp,subviewer);CHKERRQ(ierr); 203 ierr = PetscViewerFlush(subviewer);CHKERRQ(ierr); 204 } 205 ierr = PetscViewerRestoreSubViewer(viewer,PetscSubcommChild(subcomm),&subviewer);CHKERRQ(ierr); 206 ierr = PetscSubcommDestroy(&subcomm);CHKERRQ(ierr); 207 ierr = PetscViewerFlush(viewer);CHKERRQ(ierr); 208 } 209 PetscFunctionReturn(0); 210 } 211 212 #undef __FUNCT__ 213 #define __FUNCT__ "PCBDDCSetDiscreteGradient_BDDC" 214 static PetscErrorCode PCBDDCSetDiscreteGradient_BDDC(PC pc, Mat G, PetscInt order, PetscInt field, PetscBool conforming) 215 { 216 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 217 PetscErrorCode ierr; 218 219 PetscFunctionBegin; 220 ierr = PetscObjectReference((PetscObject)G);CHKERRQ(ierr); 221 ierr = MatDestroy(&pcbddc->discretegradient);CHKERRQ(ierr); 222 pcbddc->discretegradient = G; 223 pcbddc->nedorder = order > 0 ? order : -order; 224 pcbddc->conforming = conforming; 225 pcbddc->nedfield = field; 226 PetscFunctionReturn(0); 227 } 228 229 #undef __FUNCT__ 230 #define __FUNCT__ "PCBDDCSetDiscreteGradient" 231 /*@ 232 PCBDDCSetDiscreteGradient - Sets the discrete gradient 233 234 Collective on PC 235 236 Input Parameters: 237 + pc - the preconditioning context 238 . G - the discrete gradient matrix (should be in AIJ format) 239 . order - the order of the Nedelec space (1 for the lowest order) 240 . field - the field id of the Nedelec dofs (not used if the fields have not been specified) 241 - conforming - whether the mesh is conforming or not 242 243 Level: advanced 244 245 Notes: The discrete gradient matrix G is used to analyze the subdomain edges, and it should not contain any zero entry. 246 For variable order spaces, the order should be set to zero. 247 The discrete gradient matrix is modified by PCBDDC. 248 249 .seealso: PCBDDC,PCBDDCSetDofsSplitting(),PCBDDCSetDofsSplittingLocal() 250 @*/ 251 PetscErrorCode PCBDDCSetDiscreteGradient(PC pc, Mat G, PetscInt order, PetscInt field, PetscBool conforming) 252 { 253 PetscErrorCode ierr; 254 255 PetscFunctionBegin; 256 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 257 PetscValidHeaderSpecific(G,MAT_CLASSID,2); 258 PetscCheckSameComm(pc,1,G,2); 259 PetscValidLogicalCollectiveInt(pc,order,3); 260 PetscValidLogicalCollectiveBool(pc,conforming,4); 261 ierr = PetscTryMethod(pc,"PCBDDCSetDiscreteGradient_C",(PC,Mat,PetscInt,PetscInt,PetscBool),(pc,G,order,field,conforming));CHKERRQ(ierr); 262 PetscFunctionReturn(0); 263 } 264 265 #undef __FUNCT__ 266 #define __FUNCT__ "PCBDDCSetDivergenceMat_BDDC" 267 static PetscErrorCode PCBDDCSetDivergenceMat_BDDC(PC pc, Mat divudotp, PetscBool trans, IS vl2l) 268 { 269 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 270 PetscErrorCode ierr; 271 272 PetscFunctionBegin; 273 ierr = PetscObjectReference((PetscObject)divudotp);CHKERRQ(ierr); 274 ierr = MatDestroy(&pcbddc->divudotp);CHKERRQ(ierr); 275 pcbddc->divudotp = divudotp; 276 pcbddc->divudotp_trans = trans; 277 pcbddc->compute_nonetflux = PETSC_TRUE; 278 if (vl2l) { 279 ierr = PetscObjectReference((PetscObject)vl2l);CHKERRQ(ierr); 280 ierr = ISDestroy(&pcbddc->divudotp_vl2l);CHKERRQ(ierr); 281 pcbddc->divudotp_vl2l = vl2l; 282 } 283 PetscFunctionReturn(0); 284 } 285 286 #undef __FUNCT__ 287 #define __FUNCT__ "PCBDDCSetDivergenceMat" 288 /*@ 289 PCBDDCSetDivergenceMat - Sets the linear operator representing \int_\Omega \div {\bf u} \cdot p dx 290 291 Collective on PC 292 293 Input Parameters: 294 + pc - the preconditioning context 295 . divudotp - the matrix (must be of type MATIS) 296 . trans - if trans if false (resp. true), then pressures are in the test (trial) space and velocities are in the trial (test) space. 297 - vl2l - optional IS describing the local (wrt the local mat in divudotp) to local (wrt the local mat in pc->pmat) map for the velocities 298 299 Level: advanced 300 301 Notes: This auxiliary matrix is used to compute quadrature weights representing the net-flux across subdomain boundaries 302 303 .seealso: PCBDDC 304 @*/ 305 PetscErrorCode PCBDDCSetDivergenceMat(PC pc, Mat divudotp, PetscBool trans, IS vl2l) 306 { 307 PetscBool ismatis; 308 PetscErrorCode ierr; 309 310 PetscFunctionBegin; 311 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 312 PetscValidHeaderSpecific(divudotp,MAT_CLASSID,2); 313 PetscCheckSameComm(pc,1,divudotp,2); 314 PetscValidLogicalCollectiveBool(pc,trans,3); 315 if (vl2l) PetscValidHeaderSpecific(divudotp,IS_CLASSID,4); 316 ierr = PetscObjectTypeCompare((PetscObject)divudotp,MATIS,&ismatis);CHKERRQ(ierr); 317 if (!ismatis) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONG,"Divergence matrix needs to be of type MATIS"); 318 ierr = PetscTryMethod(pc,"PCBDDCSetDivergenceMat_C",(PC,Mat,PetscBool,IS),(pc,divudotp,trans,vl2l));CHKERRQ(ierr); 319 PetscFunctionReturn(0); 320 } 321 322 #undef __FUNCT__ 323 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat_BDDC" 324 static PetscErrorCode PCBDDCSetChangeOfBasisMat_BDDC(PC pc, Mat change, PetscBool interior) 325 { 326 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 327 PetscErrorCode ierr; 328 329 PetscFunctionBegin; 330 ierr = PetscObjectReference((PetscObject)change);CHKERRQ(ierr); 331 ierr = MatDestroy(&pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 332 pcbddc->user_ChangeOfBasisMatrix = change; 333 pcbddc->change_interior = interior; 334 PetscFunctionReturn(0); 335 } 336 #undef __FUNCT__ 337 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat" 338 /*@ 339 PCBDDCSetChangeOfBasisMat - Set user defined change of basis for dofs 340 341 Collective on PC 342 343 Input Parameters: 344 + pc - the preconditioning context 345 . change - the change of basis matrix 346 - interior - whether or not the change of basis modifies interior dofs 347 348 Level: intermediate 349 350 Notes: 351 352 .seealso: PCBDDC 353 @*/ 354 PetscErrorCode PCBDDCSetChangeOfBasisMat(PC pc, Mat change, PetscBool interior) 355 { 356 PetscErrorCode ierr; 357 358 PetscFunctionBegin; 359 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 360 PetscValidHeaderSpecific(change,MAT_CLASSID,2); 361 PetscCheckSameComm(pc,1,change,2); 362 if (pc->mat) { 363 PetscInt rows_c,cols_c,rows,cols; 364 ierr = MatGetSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 365 ierr = MatGetSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 366 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); 367 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); 368 ierr = MatGetLocalSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 369 ierr = MatGetLocalSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 370 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); 371 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); 372 } 373 ierr = PetscTryMethod(pc,"PCBDDCSetChangeOfBasisMat_C",(PC,Mat,PetscBool),(pc,change,interior));CHKERRQ(ierr); 374 PetscFunctionReturn(0); 375 } 376 377 #undef __FUNCT__ 378 #define __FUNCT__ "PCBDDCSetPrimalVerticesIS_BDDC" 379 static PetscErrorCode PCBDDCSetPrimalVerticesIS_BDDC(PC pc, IS PrimalVertices) 380 { 381 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 382 PetscBool isequal = PETSC_FALSE; 383 PetscErrorCode ierr; 384 385 PetscFunctionBegin; 386 ierr = PetscObjectReference((PetscObject)PrimalVertices);CHKERRQ(ierr); 387 if (pcbddc->user_primal_vertices) { 388 ierr = ISEqual(PrimalVertices,pcbddc->user_primal_vertices,&isequal);CHKERRQ(ierr); 389 } 390 ierr = ISDestroy(&pcbddc->user_primal_vertices);CHKERRQ(ierr); 391 ierr = ISDestroy(&pcbddc->user_primal_vertices_local);CHKERRQ(ierr); 392 pcbddc->user_primal_vertices = PrimalVertices; 393 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 394 PetscFunctionReturn(0); 395 } 396 #undef __FUNCT__ 397 #define __FUNCT__ "PCBDDCSetPrimalVerticesIS" 398 /*@ 399 PCBDDCSetPrimalVerticesIS - Set additional user defined primal vertices in PCBDDC 400 401 Collective 402 403 Input Parameters: 404 + pc - the preconditioning context 405 - PrimalVertices - index set of primal vertices in global numbering (can be empty) 406 407 Level: intermediate 408 409 Notes: 410 Any process can list any global node 411 412 .seealso: PCBDDC 413 @*/ 414 PetscErrorCode PCBDDCSetPrimalVerticesIS(PC pc, IS PrimalVertices) 415 { 416 PetscErrorCode ierr; 417 418 PetscFunctionBegin; 419 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 420 PetscValidHeaderSpecific(PrimalVertices,IS_CLASSID,2); 421 PetscCheckSameComm(pc,1,PrimalVertices,2); 422 ierr = PetscTryMethod(pc,"PCBDDCSetPrimalVerticesIS_C",(PC,IS),(pc,PrimalVertices));CHKERRQ(ierr); 423 PetscFunctionReturn(0); 424 } 425 426 #undef __FUNCT__ 427 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS_BDDC" 428 static PetscErrorCode PCBDDCSetPrimalVerticesLocalIS_BDDC(PC pc, IS PrimalVertices) 429 { 430 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 431 PetscBool isequal = PETSC_FALSE; 432 PetscErrorCode ierr; 433 434 PetscFunctionBegin; 435 ierr = PetscObjectReference((PetscObject)PrimalVertices);CHKERRQ(ierr); 436 if (pcbddc->user_primal_vertices_local) { 437 ierr = ISEqual(PrimalVertices,pcbddc->user_primal_vertices_local,&isequal);CHKERRQ(ierr); 438 } 439 ierr = ISDestroy(&pcbddc->user_primal_vertices);CHKERRQ(ierr); 440 ierr = ISDestroy(&pcbddc->user_primal_vertices_local);CHKERRQ(ierr); 441 pcbddc->user_primal_vertices_local = PrimalVertices; 442 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 443 PetscFunctionReturn(0); 444 } 445 #undef __FUNCT__ 446 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS" 447 /*@ 448 PCBDDCSetPrimalVerticesLocalIS - Set additional user defined primal vertices in PCBDDC 449 450 Collective 451 452 Input Parameters: 453 + pc - the preconditioning context 454 - PrimalVertices - index set of primal vertices in local numbering (can be empty) 455 456 Level: intermediate 457 458 Notes: 459 460 .seealso: PCBDDC 461 @*/ 462 PetscErrorCode PCBDDCSetPrimalVerticesLocalIS(PC pc, IS PrimalVertices) 463 { 464 PetscErrorCode ierr; 465 466 PetscFunctionBegin; 467 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 468 PetscValidHeaderSpecific(PrimalVertices,IS_CLASSID,2); 469 PetscCheckSameComm(pc,1,PrimalVertices,2); 470 ierr = PetscTryMethod(pc,"PCBDDCSetPrimalVerticesLocalIS_C",(PC,IS),(pc,PrimalVertices));CHKERRQ(ierr); 471 PetscFunctionReturn(0); 472 } 473 474 #undef __FUNCT__ 475 #define __FUNCT__ "PCBDDCSetCoarseningRatio_BDDC" 476 static PetscErrorCode PCBDDCSetCoarseningRatio_BDDC(PC pc,PetscInt k) 477 { 478 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 479 480 PetscFunctionBegin; 481 pcbddc->coarsening_ratio = k; 482 PetscFunctionReturn(0); 483 } 484 485 #undef __FUNCT__ 486 #define __FUNCT__ "PCBDDCSetCoarseningRatio" 487 /*@ 488 PCBDDCSetCoarseningRatio - Set coarsening ratio used in multilevel 489 490 Logically collective on PC 491 492 Input Parameters: 493 + pc - the preconditioning context 494 - k - coarsening ratio (H/h at the coarser level) 495 496 Options Database Keys: 497 . -pc_bddc_coarsening_ratio 498 499 Level: intermediate 500 501 Notes: 502 Approximatively k subdomains at the finer level will be aggregated into a single subdomain at the coarser level 503 504 .seealso: PCBDDC, PCBDDCSetLevels() 505 @*/ 506 PetscErrorCode PCBDDCSetCoarseningRatio(PC pc,PetscInt k) 507 { 508 PetscErrorCode ierr; 509 510 PetscFunctionBegin; 511 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 512 PetscValidLogicalCollectiveInt(pc,k,2); 513 ierr = PetscTryMethod(pc,"PCBDDCSetCoarseningRatio_C",(PC,PetscInt),(pc,k));CHKERRQ(ierr); 514 PetscFunctionReturn(0); 515 } 516 517 /* The following functions (PCBDDCSetUseExactDirichlet PCBDDCSetLevel) are not public */ 518 #undef __FUNCT__ 519 #define __FUNCT__ "PCBDDCSetUseExactDirichlet_BDDC" 520 static PetscErrorCode PCBDDCSetUseExactDirichlet_BDDC(PC pc,PetscBool flg) 521 { 522 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 523 524 PetscFunctionBegin; 525 pcbddc->use_exact_dirichlet_trick = flg; 526 PetscFunctionReturn(0); 527 } 528 529 #undef __FUNCT__ 530 #define __FUNCT__ "PCBDDCSetUseExactDirichlet" 531 PetscErrorCode PCBDDCSetUseExactDirichlet(PC pc,PetscBool flg) 532 { 533 PetscErrorCode ierr; 534 535 PetscFunctionBegin; 536 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 537 PetscValidLogicalCollectiveBool(pc,flg,2); 538 ierr = PetscTryMethod(pc,"PCBDDCSetUseExactDirichlet_C",(PC,PetscBool),(pc,flg));CHKERRQ(ierr); 539 PetscFunctionReturn(0); 540 } 541 542 #undef __FUNCT__ 543 #define __FUNCT__ "PCBDDCSetLevel_BDDC" 544 static PetscErrorCode PCBDDCSetLevel_BDDC(PC pc,PetscInt level) 545 { 546 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 547 548 PetscFunctionBegin; 549 pcbddc->current_level = level; 550 PetscFunctionReturn(0); 551 } 552 553 #undef __FUNCT__ 554 #define __FUNCT__ "PCBDDCSetLevel" 555 PetscErrorCode PCBDDCSetLevel(PC pc,PetscInt level) 556 { 557 PetscErrorCode ierr; 558 559 PetscFunctionBegin; 560 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 561 PetscValidLogicalCollectiveInt(pc,level,2); 562 ierr = PetscTryMethod(pc,"PCBDDCSetLevel_C",(PC,PetscInt),(pc,level));CHKERRQ(ierr); 563 PetscFunctionReturn(0); 564 } 565 566 #undef __FUNCT__ 567 #define __FUNCT__ "PCBDDCSetLevels_BDDC" 568 static PetscErrorCode PCBDDCSetLevels_BDDC(PC pc,PetscInt levels) 569 { 570 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 571 572 PetscFunctionBegin; 573 pcbddc->max_levels = levels; 574 PetscFunctionReturn(0); 575 } 576 577 #undef __FUNCT__ 578 #define __FUNCT__ "PCBDDCSetLevels" 579 /*@ 580 PCBDDCSetLevels - Sets the maximum number of levels for multilevel 581 582 Logically collective on PC 583 584 Input Parameters: 585 + pc - the preconditioning context 586 - levels - the maximum number of levels (max 9) 587 588 Options Database Keys: 589 . -pc_bddc_levels 590 591 Level: intermediate 592 593 Notes: 594 Default value is 0, i.e. traditional one-level BDDC 595 596 .seealso: PCBDDC, PCBDDCSetCoarseningRatio() 597 @*/ 598 PetscErrorCode PCBDDCSetLevels(PC pc,PetscInt levels) 599 { 600 PetscErrorCode ierr; 601 602 PetscFunctionBegin; 603 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 604 PetscValidLogicalCollectiveInt(pc,levels,2); 605 if (levels > 99) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Maximum number of levels for bddc is 99\n"); 606 ierr = PetscTryMethod(pc,"PCBDDCSetLevels_C",(PC,PetscInt),(pc,levels));CHKERRQ(ierr); 607 PetscFunctionReturn(0); 608 } 609 610 #undef __FUNCT__ 611 #define __FUNCT__ "PCBDDCSetDirichletBoundaries_BDDC" 612 static PetscErrorCode PCBDDCSetDirichletBoundaries_BDDC(PC pc,IS DirichletBoundaries) 613 { 614 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 615 PetscBool isequal = PETSC_FALSE; 616 PetscErrorCode ierr; 617 618 PetscFunctionBegin; 619 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 620 if (pcbddc->DirichletBoundaries) { 621 ierr = ISEqual(DirichletBoundaries,pcbddc->DirichletBoundaries,&isequal);CHKERRQ(ierr); 622 } 623 /* last user setting takes precendence -> destroy any other customization */ 624 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 625 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 626 pcbddc->DirichletBoundaries = DirichletBoundaries; 627 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 628 PetscFunctionReturn(0); 629 } 630 631 #undef __FUNCT__ 632 #define __FUNCT__ "PCBDDCSetDirichletBoundaries" 633 /*@ 634 PCBDDCSetDirichletBoundaries - Set IS defining Dirichlet boundaries for the global problem. 635 636 Collective 637 638 Input Parameters: 639 + pc - the preconditioning context 640 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries 641 642 Level: intermediate 643 644 Notes: 645 Provide the information if you used MatZeroRows/Columns routines. Any process can list any global node 646 647 .seealso: PCBDDC, PCBDDCSetDirichletBoundariesLocal(), MatZeroRows(), MatZeroRowsColumns() 648 @*/ 649 PetscErrorCode PCBDDCSetDirichletBoundaries(PC pc,IS DirichletBoundaries) 650 { 651 PetscErrorCode ierr; 652 653 PetscFunctionBegin; 654 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 655 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 656 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 657 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundaries_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 658 PetscFunctionReturn(0); 659 } 660 661 #undef __FUNCT__ 662 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal_BDDC" 663 static PetscErrorCode PCBDDCSetDirichletBoundariesLocal_BDDC(PC pc,IS DirichletBoundaries) 664 { 665 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 666 PetscBool isequal = PETSC_FALSE; 667 PetscErrorCode ierr; 668 669 PetscFunctionBegin; 670 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 671 if (pcbddc->DirichletBoundariesLocal) { 672 ierr = ISEqual(DirichletBoundaries,pcbddc->DirichletBoundariesLocal,&isequal);CHKERRQ(ierr); 673 } 674 /* last user setting takes precendence -> destroy any other customization */ 675 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 676 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 677 pcbddc->DirichletBoundariesLocal = DirichletBoundaries; 678 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 679 PetscFunctionReturn(0); 680 } 681 682 #undef __FUNCT__ 683 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal" 684 /*@ 685 PCBDDCSetDirichletBoundariesLocal - Set IS defining Dirichlet boundaries for the global problem in local ordering. 686 687 Collective 688 689 Input Parameters: 690 + pc - the preconditioning context 691 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries (in local ordering) 692 693 Level: intermediate 694 695 Notes: 696 697 .seealso: PCBDDC, PCBDDCSetDirichletBoundaries(), MatZeroRows(), MatZeroRowsColumns() 698 @*/ 699 PetscErrorCode PCBDDCSetDirichletBoundariesLocal(PC pc,IS DirichletBoundaries) 700 { 701 PetscErrorCode ierr; 702 703 PetscFunctionBegin; 704 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 705 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 706 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 707 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundariesLocal_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 708 PetscFunctionReturn(0); 709 } 710 711 #undef __FUNCT__ 712 #define __FUNCT__ "PCBDDCSetNeumannBoundaries_BDDC" 713 static PetscErrorCode PCBDDCSetNeumannBoundaries_BDDC(PC pc,IS NeumannBoundaries) 714 { 715 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 716 PetscBool isequal = PETSC_FALSE; 717 PetscErrorCode ierr; 718 719 PetscFunctionBegin; 720 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 721 if (pcbddc->NeumannBoundaries) { 722 ierr = ISEqual(NeumannBoundaries,pcbddc->NeumannBoundaries,&isequal);CHKERRQ(ierr); 723 } 724 /* last user setting takes precendence -> destroy any other customization */ 725 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 726 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 727 pcbddc->NeumannBoundaries = NeumannBoundaries; 728 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 729 PetscFunctionReturn(0); 730 } 731 732 #undef __FUNCT__ 733 #define __FUNCT__ "PCBDDCSetNeumannBoundaries" 734 /*@ 735 PCBDDCSetNeumannBoundaries - Set IS defining Neumann boundaries for the global problem. 736 737 Collective 738 739 Input Parameters: 740 + pc - the preconditioning context 741 - NeumannBoundaries - parallel IS defining the Neumann boundaries 742 743 Level: intermediate 744 745 Notes: 746 Any process can list any global node 747 748 .seealso: PCBDDC, PCBDDCSetNeumannBoundariesLocal() 749 @*/ 750 PetscErrorCode PCBDDCSetNeumannBoundaries(PC pc,IS NeumannBoundaries) 751 { 752 PetscErrorCode ierr; 753 754 PetscFunctionBegin; 755 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 756 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 757 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 758 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundaries_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 759 PetscFunctionReturn(0); 760 } 761 762 #undef __FUNCT__ 763 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal_BDDC" 764 static PetscErrorCode PCBDDCSetNeumannBoundariesLocal_BDDC(PC pc,IS NeumannBoundaries) 765 { 766 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 767 PetscBool isequal = PETSC_FALSE; 768 PetscErrorCode ierr; 769 770 PetscFunctionBegin; 771 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 772 if (pcbddc->NeumannBoundariesLocal) { 773 ierr = ISEqual(NeumannBoundaries,pcbddc->NeumannBoundariesLocal,&isequal);CHKERRQ(ierr); 774 } 775 /* last user setting takes precendence -> destroy any other customization */ 776 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 777 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 778 pcbddc->NeumannBoundariesLocal = NeumannBoundaries; 779 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 780 PetscFunctionReturn(0); 781 } 782 783 #undef __FUNCT__ 784 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal" 785 /*@ 786 PCBDDCSetNeumannBoundariesLocal - Set IS defining Neumann boundaries for the global problem in local ordering. 787 788 Collective 789 790 Input Parameters: 791 + pc - the preconditioning context 792 - NeumannBoundaries - parallel IS defining the subdomain part of Neumann boundaries (in local ordering) 793 794 Level: intermediate 795 796 Notes: 797 798 .seealso: PCBDDC, PCBDDCSetNeumannBoundaries() 799 @*/ 800 PetscErrorCode PCBDDCSetNeumannBoundariesLocal(PC pc,IS NeumannBoundaries) 801 { 802 PetscErrorCode ierr; 803 804 PetscFunctionBegin; 805 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 806 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 807 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 808 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundariesLocal_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 809 PetscFunctionReturn(0); 810 } 811 812 #undef __FUNCT__ 813 #define __FUNCT__ "PCBDDCGetDirichletBoundaries_BDDC" 814 static PetscErrorCode PCBDDCGetDirichletBoundaries_BDDC(PC pc,IS *DirichletBoundaries) 815 { 816 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 817 818 PetscFunctionBegin; 819 *DirichletBoundaries = pcbddc->DirichletBoundaries; 820 PetscFunctionReturn(0); 821 } 822 823 #undef __FUNCT__ 824 #define __FUNCT__ "PCBDDCGetDirichletBoundaries" 825 /*@ 826 PCBDDCGetDirichletBoundaries - Get parallel IS for Dirichlet boundaries 827 828 Collective 829 830 Input Parameters: 831 . pc - the preconditioning context 832 833 Output Parameters: 834 . DirichletBoundaries - index set defining the Dirichlet boundaries 835 836 Level: intermediate 837 838 Notes: 839 The IS returned (if any) is the same passed in earlier by the user with PCBDDCSetDirichletBoundaries 840 841 .seealso: PCBDDC 842 @*/ 843 PetscErrorCode PCBDDCGetDirichletBoundaries(PC pc,IS *DirichletBoundaries) 844 { 845 PetscErrorCode ierr; 846 847 PetscFunctionBegin; 848 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 849 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundaries_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 850 PetscFunctionReturn(0); 851 } 852 853 #undef __FUNCT__ 854 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal_BDDC" 855 static PetscErrorCode PCBDDCGetDirichletBoundariesLocal_BDDC(PC pc,IS *DirichletBoundaries) 856 { 857 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 858 859 PetscFunctionBegin; 860 *DirichletBoundaries = pcbddc->DirichletBoundariesLocal; 861 PetscFunctionReturn(0); 862 } 863 864 #undef __FUNCT__ 865 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal" 866 /*@ 867 PCBDDCGetDirichletBoundariesLocal - Get parallel IS for Dirichlet boundaries (in local ordering) 868 869 Collective 870 871 Input Parameters: 872 . pc - the preconditioning context 873 874 Output Parameters: 875 . DirichletBoundaries - index set defining the subdomain part of Dirichlet boundaries 876 877 Level: intermediate 878 879 Notes: 880 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). 881 In the latter case, the IS will be available after PCSetUp. 882 883 .seealso: PCBDDC 884 @*/ 885 PetscErrorCode PCBDDCGetDirichletBoundariesLocal(PC pc,IS *DirichletBoundaries) 886 { 887 PetscErrorCode ierr; 888 889 PetscFunctionBegin; 890 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 891 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundariesLocal_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 892 PetscFunctionReturn(0); 893 } 894 895 #undef __FUNCT__ 896 #define __FUNCT__ "PCBDDCGetNeumannBoundaries_BDDC" 897 static PetscErrorCode PCBDDCGetNeumannBoundaries_BDDC(PC pc,IS *NeumannBoundaries) 898 { 899 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 900 901 PetscFunctionBegin; 902 *NeumannBoundaries = pcbddc->NeumannBoundaries; 903 PetscFunctionReturn(0); 904 } 905 906 #undef __FUNCT__ 907 #define __FUNCT__ "PCBDDCGetNeumannBoundaries" 908 /*@ 909 PCBDDCGetNeumannBoundaries - Get parallel IS for Neumann boundaries 910 911 Collective 912 913 Input Parameters: 914 . pc - the preconditioning context 915 916 Output Parameters: 917 . NeumannBoundaries - index set defining the Neumann boundaries 918 919 Level: intermediate 920 921 Notes: 922 The IS returned (if any) is the same passed in earlier by the user with PCBDDCSetNeumannBoundaries 923 924 .seealso: PCBDDC 925 @*/ 926 PetscErrorCode PCBDDCGetNeumannBoundaries(PC pc,IS *NeumannBoundaries) 927 { 928 PetscErrorCode ierr; 929 930 PetscFunctionBegin; 931 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 932 ierr = PetscUseMethod(pc,"PCBDDCGetNeumannBoundaries_C",(PC,IS*),(pc,NeumannBoundaries));CHKERRQ(ierr); 933 PetscFunctionReturn(0); 934 } 935 936 #undef __FUNCT__ 937 #define __FUNCT__ "PCBDDCGetNeumannBoundariesLocal_BDDC" 938 static PetscErrorCode PCBDDCGetNeumannBoundariesLocal_BDDC(PC pc,IS *NeumannBoundaries) 939 { 940 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 941 942 PetscFunctionBegin; 943 *NeumannBoundaries = pcbddc->NeumannBoundariesLocal; 944 PetscFunctionReturn(0); 945 } 946 947 #undef __FUNCT__ 948 #define __FUNCT__ "PCBDDCGetNeumannBoundariesLocal" 949 /*@ 950 PCBDDCGetNeumannBoundariesLocal - Get parallel IS for Neumann boundaries (in local ordering) 951 952 Collective 953 954 Input Parameters: 955 . pc - the preconditioning context 956 957 Output Parameters: 958 . NeumannBoundaries - index set defining the subdomain part of Neumann boundaries 959 960 Level: intermediate 961 962 Notes: 963 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). 964 In the latter case, the IS will be available after PCSetUp. 965 966 .seealso: PCBDDC 967 @*/ 968 PetscErrorCode PCBDDCGetNeumannBoundariesLocal(PC pc,IS *NeumannBoundaries) 969 { 970 PetscErrorCode ierr; 971 972 PetscFunctionBegin; 973 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 974 ierr = PetscUseMethod(pc,"PCBDDCGetNeumannBoundariesLocal_C",(PC,IS*),(pc,NeumannBoundaries));CHKERRQ(ierr); 975 PetscFunctionReturn(0); 976 } 977 978 #undef __FUNCT__ 979 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph_BDDC" 980 static PetscErrorCode PCBDDCSetLocalAdjacencyGraph_BDDC(PC pc, PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 981 { 982 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 983 PCBDDCGraph mat_graph = pcbddc->mat_graph; 984 PetscBool same_data = PETSC_FALSE; 985 PetscErrorCode ierr; 986 987 PetscFunctionBegin; 988 if (!nvtxs) { 989 ierr = PCBDDCGraphResetCSR(mat_graph);CHKERRQ(ierr); 990 PetscFunctionReturn(0); 991 } 992 if (mat_graph->nvtxs_csr == nvtxs && mat_graph->freecsr) { /* we own the data */ 993 if (mat_graph->xadj == xadj && mat_graph->adjncy == adjncy) same_data = PETSC_TRUE; 994 if (!same_data && mat_graph->xadj[nvtxs] == xadj[nvtxs]) { 995 ierr = PetscMemcmp(xadj,mat_graph->xadj,(nvtxs+1)*sizeof(PetscInt),&same_data);CHKERRQ(ierr); 996 if (same_data) { 997 ierr = PetscMemcmp(adjncy,mat_graph->adjncy,xadj[nvtxs]*sizeof(PetscInt),&same_data);CHKERRQ(ierr); 998 } 999 } 1000 } 1001 if (!same_data) { 1002 /* free old CSR */ 1003 ierr = PCBDDCGraphResetCSR(mat_graph);CHKERRQ(ierr); 1004 /* get CSR into graph structure */ 1005 if (copymode == PETSC_COPY_VALUES) { 1006 ierr = PetscMalloc1(nvtxs+1,&mat_graph->xadj);CHKERRQ(ierr); 1007 ierr = PetscMalloc1(xadj[nvtxs],&mat_graph->adjncy);CHKERRQ(ierr); 1008 ierr = PetscMemcpy(mat_graph->xadj,xadj,(nvtxs+1)*sizeof(PetscInt));CHKERRQ(ierr); 1009 ierr = PetscMemcpy(mat_graph->adjncy,adjncy,xadj[nvtxs]*sizeof(PetscInt));CHKERRQ(ierr); 1010 mat_graph->freecsr = PETSC_TRUE; 1011 } else if (copymode == PETSC_OWN_POINTER) { 1012 mat_graph->xadj = (PetscInt*)xadj; 1013 mat_graph->adjncy = (PetscInt*)adjncy; 1014 mat_graph->freecsr = PETSC_TRUE; 1015 } else if (copymode == PETSC_USE_POINTER) { 1016 mat_graph->xadj = (PetscInt*)xadj; 1017 mat_graph->adjncy = (PetscInt*)adjncy; 1018 mat_graph->freecsr = PETSC_FALSE; 1019 } else SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unsupported copy mode %d",copymode); 1020 mat_graph->nvtxs_csr = nvtxs; 1021 pcbddc->recompute_topography = PETSC_TRUE; 1022 } 1023 PetscFunctionReturn(0); 1024 } 1025 1026 #undef __FUNCT__ 1027 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph" 1028 /*@ 1029 PCBDDCSetLocalAdjacencyGraph - Set adjacency structure (CSR graph) of the local degrees of freedom. 1030 1031 Not collective 1032 1033 Input Parameters: 1034 + pc - the preconditioning context. 1035 . nvtxs - number of local vertices of the graph (i.e., the number of local dofs). 1036 . xadj, adjncy - the connectivity of the dofs in CSR format. 1037 - copymode - supported modes are PETSC_COPY_VALUES, PETSC_USE_POINTER or PETSC_OWN_POINTER. 1038 1039 Level: intermediate 1040 1041 Notes: A dof is considered connected with all local dofs if xadj[dof+1]-xadj[dof] == 1 and adjncy[xadj[dof]] is negative. 1042 1043 .seealso: PCBDDC,PetscCopyMode 1044 @*/ 1045 PetscErrorCode PCBDDCSetLocalAdjacencyGraph(PC pc,PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 1046 { 1047 void (*f)(void) = 0; 1048 PetscErrorCode ierr; 1049 1050 PetscFunctionBegin; 1051 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 1052 if (nvtxs) { 1053 PetscValidIntPointer(xadj,3); 1054 PetscValidIntPointer(adjncy,4); 1055 } 1056 ierr = PetscTryMethod(pc,"PCBDDCSetLocalAdjacencyGraph_C",(PC,PetscInt,const PetscInt[],const PetscInt[],PetscCopyMode),(pc,nvtxs,xadj,adjncy,copymode));CHKERRQ(ierr); 1057 /* free arrays if PCBDDC is not the PC type */ 1058 ierr = PetscObjectQueryFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",&f);CHKERRQ(ierr); 1059 if (!f && copymode == PETSC_OWN_POINTER) { 1060 ierr = PetscFree(xadj);CHKERRQ(ierr); 1061 ierr = PetscFree(adjncy);CHKERRQ(ierr); 1062 } 1063 PetscFunctionReturn(0); 1064 } 1065 1066 #undef __FUNCT__ 1067 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal_BDDC" 1068 static PetscErrorCode PCBDDCSetDofsSplittingLocal_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 1069 { 1070 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1071 PetscInt i; 1072 PetscBool isequal = PETSC_FALSE; 1073 PetscErrorCode ierr; 1074 1075 PetscFunctionBegin; 1076 if (pcbddc->n_ISForDofsLocal == n_is) { 1077 for (i=0;i<n_is;i++) { 1078 PetscBool isequalt; 1079 ierr = ISEqual(ISForDofs[i],pcbddc->ISForDofsLocal[i],&isequalt);CHKERRQ(ierr); 1080 if (!isequalt) break; 1081 } 1082 if (i == n_is) isequal = PETSC_TRUE; 1083 } 1084 for (i=0;i<n_is;i++) { 1085 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 1086 } 1087 /* Destroy ISes if they were already set */ 1088 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 1089 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 1090 } 1091 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 1092 /* last user setting takes precendence -> destroy any other customization */ 1093 for (i=0;i<pcbddc->n_ISForDofs;i++) { 1094 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 1095 } 1096 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 1097 pcbddc->n_ISForDofs = 0; 1098 /* allocate space then set */ 1099 if (n_is) { 1100 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofsLocal);CHKERRQ(ierr); 1101 } 1102 for (i=0;i<n_is;i++) { 1103 pcbddc->ISForDofsLocal[i] = ISForDofs[i]; 1104 } 1105 pcbddc->n_ISForDofsLocal = n_is; 1106 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 1107 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 1108 PetscFunctionReturn(0); 1109 } 1110 1111 #undef __FUNCT__ 1112 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal" 1113 /*@ 1114 PCBDDCSetDofsSplittingLocal - Set index sets defining fields of the local subdomain matrix 1115 1116 Collective 1117 1118 Input Parameters: 1119 + pc - the preconditioning context 1120 . n_is - number of index sets defining the fields 1121 - ISForDofs - array of IS describing the fields in local ordering 1122 1123 Level: intermediate 1124 1125 Notes: 1126 n_is should be the same among processes. Not all nodes need to be listed: unlisted nodes will belong to the complement field. 1127 1128 .seealso: PCBDDC 1129 @*/ 1130 PetscErrorCode PCBDDCSetDofsSplittingLocal(PC pc,PetscInt n_is, IS ISForDofs[]) 1131 { 1132 PetscInt i; 1133 PetscErrorCode ierr; 1134 1135 PetscFunctionBegin; 1136 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 1137 PetscValidLogicalCollectiveInt(pc,n_is,2); 1138 for (i=0;i<n_is;i++) { 1139 PetscCheckSameComm(pc,1,ISForDofs[i],3); 1140 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 1141 } 1142 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplittingLocal_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 1143 PetscFunctionReturn(0); 1144 } 1145 1146 #undef __FUNCT__ 1147 #define __FUNCT__ "PCBDDCSetDofsSplitting_BDDC" 1148 static PetscErrorCode PCBDDCSetDofsSplitting_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 1149 { 1150 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1151 PetscInt i; 1152 PetscBool isequal = PETSC_FALSE; 1153 PetscErrorCode ierr; 1154 1155 PetscFunctionBegin; 1156 if (pcbddc->n_ISForDofs == n_is) { 1157 for (i=0;i<n_is;i++) { 1158 PetscBool isequalt; 1159 ierr = ISEqual(ISForDofs[i],pcbddc->ISForDofs[i],&isequalt);CHKERRQ(ierr); 1160 if (!isequalt) break; 1161 } 1162 if (i == n_is) isequal = PETSC_TRUE; 1163 } 1164 for (i=0;i<n_is;i++) { 1165 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 1166 } 1167 /* Destroy ISes if they were already set */ 1168 for (i=0;i<pcbddc->n_ISForDofs;i++) { 1169 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 1170 } 1171 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 1172 /* last user setting takes precendence -> destroy any other customization */ 1173 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 1174 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 1175 } 1176 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 1177 pcbddc->n_ISForDofsLocal = 0; 1178 /* allocate space then set */ 1179 if (n_is) { 1180 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofs);CHKERRQ(ierr); 1181 } 1182 for (i=0;i<n_is;i++) { 1183 pcbddc->ISForDofs[i] = ISForDofs[i]; 1184 } 1185 pcbddc->n_ISForDofs = n_is; 1186 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 1187 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 1188 PetscFunctionReturn(0); 1189 } 1190 1191 #undef __FUNCT__ 1192 #define __FUNCT__ "PCBDDCSetDofsSplitting" 1193 /*@ 1194 PCBDDCSetDofsSplitting - Set index sets defining fields of the global matrix 1195 1196 Collective 1197 1198 Input Parameters: 1199 + pc - the preconditioning context 1200 . n_is - number of index sets defining the fields 1201 - ISForDofs - array of IS describing the fields in global ordering 1202 1203 Level: intermediate 1204 1205 Notes: 1206 Any process can list any global node. Not all nodes need to be listed: unlisted nodes will belong to the complement field. 1207 1208 .seealso: PCBDDC 1209 @*/ 1210 PetscErrorCode PCBDDCSetDofsSplitting(PC pc,PetscInt n_is, IS ISForDofs[]) 1211 { 1212 PetscInt i; 1213 PetscErrorCode ierr; 1214 1215 PetscFunctionBegin; 1216 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 1217 PetscValidLogicalCollectiveInt(pc,n_is,2); 1218 for (i=0;i<n_is;i++) { 1219 PetscCheckSameComm(pc,1,ISForDofs[i],3); 1220 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 1221 } 1222 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplitting_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 1223 PetscFunctionReturn(0); 1224 } 1225 1226 #undef __FUNCT__ 1227 #define __FUNCT__ "PCPreSolve_BDDC" 1228 /* 1229 PCPreSolve_BDDC - Changes the right hand side and (if necessary) the initial 1230 guess if a transformation of basis approach has been selected. 1231 1232 Input Parameter: 1233 + pc - the preconditioner contex 1234 1235 Application Interface Routine: PCPreSolve() 1236 1237 Notes: 1238 The interface routine PCPreSolve() is not usually called directly by 1239 the user, but instead is called by KSPSolve(). 1240 */ 1241 static PetscErrorCode PCPreSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 1242 { 1243 PetscErrorCode ierr; 1244 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1245 PC_IS *pcis = (PC_IS*)(pc->data); 1246 Vec used_vec; 1247 PetscBool save_rhs = PETSC_TRUE, benign_correction_computed; 1248 1249 PetscFunctionBegin; 1250 /* if we are working with CG, one dirichlet solve can be avoided during Krylov iterations */ 1251 if (ksp) { 1252 PetscBool iscg, isgroppcg, ispipecg, ispipecgrr; 1253 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPCG,&iscg);CHKERRQ(ierr); 1254 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPGROPPCG,&isgroppcg);CHKERRQ(ierr); 1255 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPPIPECG,&ispipecg);CHKERRQ(ierr); 1256 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPPIPECGRR,&ispipecgrr);CHKERRQ(ierr); 1257 if (pcbddc->benign_apply_coarse_only || pcbddc->switch_static || (!iscg && !isgroppcg && !ispipecg && !ispipecgrr)) { 1258 ierr = PCBDDCSetUseExactDirichlet(pc,PETSC_FALSE);CHKERRQ(ierr); 1259 } 1260 } 1261 if (pcbddc->benign_apply_coarse_only || pcbddc->switch_static) { 1262 ierr = PCBDDCSetUseExactDirichlet(pc,PETSC_FALSE);CHKERRQ(ierr); 1263 } 1264 1265 /* Creates parallel work vectors used in presolve */ 1266 if (!pcbddc->original_rhs) { 1267 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->original_rhs);CHKERRQ(ierr); 1268 } 1269 if (!pcbddc->temp_solution) { 1270 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->temp_solution);CHKERRQ(ierr); 1271 } 1272 1273 pcbddc->temp_solution_used = PETSC_FALSE; 1274 if (x) { 1275 ierr = PetscObjectReference((PetscObject)x);CHKERRQ(ierr); 1276 used_vec = x; 1277 } else { /* it can only happen when calling PCBDDCMatFETIDPGetRHS */ 1278 ierr = PetscObjectReference((PetscObject)pcbddc->temp_solution);CHKERRQ(ierr); 1279 used_vec = pcbddc->temp_solution; 1280 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 1281 pcbddc->temp_solution_used = PETSC_TRUE; 1282 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1283 save_rhs = PETSC_FALSE; 1284 pcbddc->eliminate_dirdofs = PETSC_TRUE; 1285 } 1286 1287 /* hack into ksp data structure since PCPreSolve comes earlier than setting to zero the guess in src/ksp/ksp/interface/itfunc.c */ 1288 if (ksp) { 1289 /* store the flag for the initial guess since it will be restored back during PCPostSolve_BDDC */ 1290 ierr = KSPGetInitialGuessNonzero(ksp,&pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 1291 if (!pcbddc->ksp_guess_nonzero) { 1292 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 1293 } 1294 } 1295 1296 pcbddc->rhs_change = PETSC_FALSE; 1297 /* Take into account zeroed rows -> change rhs and store solution removed */ 1298 if (rhs && pcbddc->eliminate_dirdofs) { 1299 IS dirIS = NULL; 1300 1301 /* DirichletBoundariesLocal may not be consistent among neighbours; gets a dirichlet dofs IS from graph (may be cached) */ 1302 ierr = PCBDDCGraphGetDirichletDofs(pcbddc->mat_graph,&dirIS);CHKERRQ(ierr); 1303 if (dirIS) { 1304 Mat_IS *matis = (Mat_IS*)pc->pmat->data; 1305 PetscInt dirsize,i,*is_indices; 1306 PetscScalar *array_x; 1307 const PetscScalar *array_diagonal; 1308 1309 ierr = MatGetDiagonal(pc->pmat,pcis->vec1_global);CHKERRQ(ierr); 1310 ierr = VecPointwiseDivide(pcis->vec1_global,rhs,pcis->vec1_global);CHKERRQ(ierr); 1311 ierr = VecScatterBegin(matis->rctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1312 ierr = VecScatterEnd(matis->rctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1313 ierr = VecScatterBegin(matis->rctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1314 ierr = VecScatterEnd(matis->rctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1315 ierr = ISGetLocalSize(dirIS,&dirsize);CHKERRQ(ierr); 1316 ierr = VecGetArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1317 ierr = VecGetArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1318 ierr = ISGetIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1319 for (i=0; i<dirsize; i++) array_x[is_indices[i]] = array_diagonal[is_indices[i]]; 1320 ierr = ISRestoreIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1321 ierr = VecRestoreArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1322 ierr = VecRestoreArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1323 ierr = VecScatterBegin(matis->rctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1324 ierr = VecScatterEnd(matis->rctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1325 pcbddc->rhs_change = PETSC_TRUE; 1326 ierr = ISDestroy(&dirIS);CHKERRQ(ierr); 1327 } 1328 } 1329 1330 /* remove the computed solution or the initial guess from the rhs */ 1331 if (pcbddc->rhs_change || (ksp && pcbddc->ksp_guess_nonzero) ) { 1332 /* save the original rhs */ 1333 if (save_rhs) { 1334 ierr = VecSwap(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1335 save_rhs = PETSC_FALSE; 1336 } 1337 pcbddc->rhs_change = PETSC_TRUE; 1338 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1339 ierr = MatMultAdd(pc->mat,used_vec,pcbddc->original_rhs,rhs);CHKERRQ(ierr); 1340 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1341 ierr = VecCopy(used_vec,pcbddc->temp_solution);CHKERRQ(ierr); 1342 pcbddc->temp_solution_used = PETSC_TRUE; 1343 if (ksp) { 1344 ierr = KSPSetInitialGuessNonzero(ksp,PETSC_FALSE);CHKERRQ(ierr); 1345 } 1346 } 1347 ierr = VecDestroy(&used_vec);CHKERRQ(ierr); 1348 1349 /* compute initial vector in benign space if needed 1350 and remove non-benign solution from the rhs */ 1351 benign_correction_computed = PETSC_FALSE; 1352 if (rhs && pcbddc->benign_compute_correction && pcbddc->benign_have_null) { 1353 /* compute u^*_h using ideas similar to those in Xuemin Tu's PhD thesis (see Section 4.8.1) 1354 Recursively apply BDDC in the multilevel case */ 1355 if (!pcbddc->benign_vec) { 1356 ierr = VecDuplicate(rhs,&pcbddc->benign_vec);CHKERRQ(ierr); 1357 } 1358 pcbddc->benign_apply_coarse_only = PETSC_TRUE; 1359 if (!pcbddc->benign_skip_correction) { 1360 ierr = PCApply_BDDC(pc,rhs,pcbddc->benign_vec);CHKERRQ(ierr); 1361 benign_correction_computed = PETSC_TRUE; 1362 if (pcbddc->temp_solution_used) { 1363 ierr = VecAXPY(pcbddc->temp_solution,1.0,pcbddc->benign_vec);CHKERRQ(ierr); 1364 } 1365 ierr = VecScale(pcbddc->benign_vec,-1.0);CHKERRQ(ierr); 1366 /* store the original rhs if not done earlier */ 1367 if (save_rhs) { 1368 ierr = VecSwap(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1369 } 1370 if (pcbddc->rhs_change) { 1371 ierr = MatMultAdd(pc->mat,pcbddc->benign_vec,rhs,rhs);CHKERRQ(ierr); 1372 } else { 1373 ierr = MatMultAdd(pc->mat,pcbddc->benign_vec,pcbddc->original_rhs,rhs);CHKERRQ(ierr); 1374 } 1375 pcbddc->rhs_change = PETSC_TRUE; 1376 } 1377 pcbddc->benign_apply_coarse_only = PETSC_FALSE; 1378 } 1379 1380 /* dbg output */ 1381 if (pcbddc->dbg_flag && benign_correction_computed) { 1382 Vec v; 1383 ierr = VecDuplicate(pcis->vec1_global,&v);CHKERRQ(ierr); 1384 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,rhs,v);CHKERRQ(ierr); 1385 ierr = PCBDDCBenignGetOrSetP0(pc,v,PETSC_TRUE);CHKERRQ(ierr); 1386 ierr = PetscViewerASCIIPrintf(pcbddc->dbg_viewer,"LEVEL %d: is the correction benign?\n",pcbddc->current_level);CHKERRQ(ierr); 1387 ierr = PetscScalarView(pcbddc->benign_n,pcbddc->benign_p0,PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)pc)));CHKERRQ(ierr); 1388 ierr = VecDestroy(&v);CHKERRQ(ierr); 1389 } 1390 1391 /* set initial guess if using PCG */ 1392 pcbddc->exact_dirichlet_trick_app = PETSC_FALSE; 1393 if (x && pcbddc->use_exact_dirichlet_trick) { 1394 ierr = VecSet(x,0.0);CHKERRQ(ierr); 1395 if (pcbddc->ChangeOfBasisMatrix && pcbddc->change_interior) { 1396 if (benign_correction_computed) { /* we have already saved the changed rhs */ 1397 ierr = VecLockPop(pcis->vec1_global);CHKERRQ(ierr); 1398 } else { 1399 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,rhs,pcis->vec1_global);CHKERRQ(ierr); 1400 } 1401 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec1_global,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1402 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec1_global,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1403 } else { 1404 ierr = VecScatterBegin(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1405 ierr = VecScatterEnd(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1406 } 1407 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1408 if (pcbddc->ChangeOfBasisMatrix && pcbddc->change_interior) { 1409 ierr = VecSet(pcis->vec1_global,0.);CHKERRQ(ierr); 1410 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,pcis->vec1_global,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1411 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,pcis->vec1_global,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1412 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,pcis->vec1_global,x);CHKERRQ(ierr); 1413 } else { 1414 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1415 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1416 } 1417 if (ksp) { 1418 ierr = KSPSetInitialGuessNonzero(ksp,PETSC_TRUE);CHKERRQ(ierr); 1419 } 1420 pcbddc->exact_dirichlet_trick_app = PETSC_TRUE; 1421 } else if (pcbddc->ChangeOfBasisMatrix && pcbddc->change_interior && benign_correction_computed && pcbddc->use_exact_dirichlet_trick) { 1422 ierr = VecLockPop(pcis->vec1_global);CHKERRQ(ierr); 1423 } 1424 PetscFunctionReturn(0); 1425 } 1426 1427 #undef __FUNCT__ 1428 #define __FUNCT__ "PCPostSolve_BDDC" 1429 /* 1430 PCPostSolve_BDDC - Changes the computed solution if a transformation of basis 1431 approach has been selected. Also, restores rhs to its original state. 1432 1433 Input Parameter: 1434 + pc - the preconditioner contex 1435 1436 Application Interface Routine: PCPostSolve() 1437 1438 Notes: 1439 The interface routine PCPostSolve() is not usually called directly by 1440 the user, but instead is called by KSPSolve(). 1441 */ 1442 static PetscErrorCode PCPostSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 1443 { 1444 PetscErrorCode ierr; 1445 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1446 1447 PetscFunctionBegin; 1448 /* add solution removed in presolve */ 1449 if (x && pcbddc->rhs_change) { 1450 if (pcbddc->temp_solution_used) { 1451 ierr = VecAXPY(x,1.0,pcbddc->temp_solution);CHKERRQ(ierr); 1452 } else if (pcbddc->benign_compute_correction) { 1453 ierr = VecAXPY(x,-1.0,pcbddc->benign_vec);CHKERRQ(ierr); 1454 } 1455 } 1456 pcbddc->temp_solution_used = PETSC_FALSE; 1457 1458 /* restore rhs to its original state (not needed for FETI-DP) */ 1459 if (rhs && pcbddc->rhs_change) { 1460 ierr = VecSwap(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1461 } 1462 pcbddc->rhs_change = PETSC_FALSE; 1463 /* restore ksp guess state */ 1464 if (ksp) { 1465 ierr = KSPSetInitialGuessNonzero(ksp,pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 1466 } 1467 /* reset flag for exact dirichlet trick */ 1468 pcbddc->exact_dirichlet_trick_app = PETSC_FALSE; 1469 PetscFunctionReturn(0); 1470 } 1471 #undef __FUNCT__ 1472 #define __FUNCT__ "PCSetUp_BDDC" 1473 /* 1474 PCSetUp_BDDC - Prepares for the use of the BDDC preconditioner 1475 by setting data structures and options. 1476 1477 Input Parameter: 1478 + pc - the preconditioner context 1479 1480 Application Interface Routine: PCSetUp() 1481 1482 Notes: 1483 The interface routine PCSetUp() is not usually called directly by 1484 the user, but instead is called by PCApply() if necessary. 1485 */ 1486 PetscErrorCode PCSetUp_BDDC(PC pc) 1487 { 1488 PC_BDDC* pcbddc = (PC_BDDC*)pc->data; 1489 PCBDDCSubSchurs sub_schurs; 1490 Mat_IS* matis; 1491 MatNullSpace nearnullspace; 1492 IS zerodiag = NULL; 1493 PetscInt nrows,ncols; 1494 PetscBool computesubschurs; 1495 PetscBool computeconstraintsmatrix; 1496 PetscBool new_nearnullspace_provided,ismatis; 1497 PetscErrorCode ierr; 1498 1499 PetscFunctionBegin; 1500 ierr = PetscObjectTypeCompare((PetscObject)pc->pmat,MATIS,&ismatis);CHKERRQ(ierr); 1501 if (!ismatis) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONG,"PCBDDC preconditioner requires matrix of type MATIS"); 1502 ierr = MatGetSize(pc->pmat,&nrows,&ncols);CHKERRQ(ierr); 1503 if (nrows != ncols) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"PCBDDC preconditioner requires a square preconditioning matrix"); 1504 matis = (Mat_IS*)pc->pmat->data; 1505 /* the following lines of code should be replaced by a better logic between PCIS, PCNN, PCBDDC and other future nonoverlapping preconditioners */ 1506 /* For BDDC we need to define a local "Neumann" problem different to that defined in PCISSetup 1507 Also, BDDC builds its own KSP for the Dirichlet problem */ 1508 if (pc->setupcalled && pc->flag != SAME_NONZERO_PATTERN) pcbddc->recompute_topography = PETSC_TRUE; 1509 computeconstraintsmatrix = PETSC_FALSE; 1510 1511 /* check parameters' compatibility */ 1512 if (!pcbddc->use_deluxe_scaling) pcbddc->deluxe_zerorows = PETSC_FALSE; 1513 pcbddc->adaptive_selection = (PetscBool)(pcbddc->adaptive_threshold > 0.0); 1514 pcbddc->adaptive_userdefined = (PetscBool)(pcbddc->adaptive_selection && pcbddc->adaptive_userdefined); 1515 if (pcbddc->adaptive_selection) pcbddc->use_faces = PETSC_TRUE; 1516 1517 computesubschurs = (PetscBool)(pcbddc->adaptive_selection || pcbddc->use_deluxe_scaling); 1518 if (pcbddc->switch_static) { 1519 PetscBool ismatis; 1520 ierr = PetscObjectTypeCompare((PetscObject)pc->mat,MATIS,&ismatis);CHKERRQ(ierr); 1521 if (!ismatis) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"When the static switch is one, the iteration matrix should be of type MATIS"); 1522 } 1523 1524 /* activate all connected components if the netflux has been requested */ 1525 if (pcbddc->compute_nonetflux) { 1526 pcbddc->use_vertices = PETSC_TRUE; 1527 pcbddc->use_edges = PETSC_TRUE; 1528 pcbddc->use_faces = PETSC_TRUE; 1529 } 1530 1531 /* Get stdout for dbg */ 1532 if (pcbddc->dbg_flag) { 1533 if (!pcbddc->dbg_viewer) { 1534 pcbddc->dbg_viewer = PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)pc)); 1535 ierr = PetscViewerASCIIPushSynchronized(pcbddc->dbg_viewer);CHKERRQ(ierr); 1536 } 1537 ierr = PetscViewerASCIIAddTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1538 } 1539 1540 /* process topology information */ 1541 if (pcbddc->recompute_topography) { 1542 ierr = PCBDDCComputeLocalTopologyInfo(pc);CHKERRQ(ierr); 1543 if (pcbddc->discretegradient) { 1544 ierr = PCBDDCNedelecSupport(pc);CHKERRQ(ierr); 1545 } 1546 } 1547 1548 /* change basis if requested by the user */ 1549 if (pcbddc->user_ChangeOfBasisMatrix) { 1550 /* use_change_of_basis flag is used to automatically compute a change of basis from constraints */ 1551 pcbddc->use_change_of_basis = PETSC_FALSE; 1552 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 1553 } else { 1554 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1555 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1556 pcbddc->local_mat = matis->A; 1557 } 1558 1559 /* detect local disconnected subdomains if requested */ 1560 if (pcbddc->detect_disconnected && pcbddc->recompute_topography) { 1561 PetscInt i; 1562 for (i=0;i<pcbddc->n_local_subs;i++) { 1563 ierr = ISDestroy(&pcbddc->local_subs[i]);CHKERRQ(ierr); 1564 } 1565 ierr = PetscFree(pcbddc->local_subs);CHKERRQ(ierr); 1566 ierr = MatDetectDisconnectedComponents(pcbddc->local_mat,PETSC_FALSE,&pcbddc->n_local_subs,&pcbddc->local_subs);CHKERRQ(ierr); 1567 } 1568 1569 /* 1570 Compute change of basis on local pressures (aka zerodiag dofs) with the benign trick 1571 This should come earlier then PCISSetUp for extracting the correct subdomain matrices 1572 */ 1573 ierr = PCBDDCBenignShellMat(pc,PETSC_TRUE);CHKERRQ(ierr); 1574 if (pcbddc->benign_saddle_point) { 1575 PC_IS* pcis = (PC_IS*)pc->data; 1576 1577 if (pcbddc->user_ChangeOfBasisMatrix || pcbddc->use_change_of_basis || !computesubschurs) pcbddc->benign_change_explicit = PETSC_TRUE; 1578 /* detect local saddle point and change the basis in pcbddc->local_mat (TODO: reuse case) */ 1579 ierr = PCBDDCBenignDetectSaddlePoint(pc,&zerodiag);CHKERRQ(ierr); 1580 /* pop B0 mat from local mat */ 1581 ierr = PCBDDCBenignPopOrPushB0(pc,PETSC_TRUE);CHKERRQ(ierr); 1582 /* give pcis a hint to not reuse submatrices during PCISCreate */ 1583 if (pc->flag == SAME_NONZERO_PATTERN && pcis->reusesubmatrices == PETSC_TRUE) { 1584 if (pcbddc->benign_n && (pcbddc->benign_change_explicit || pcbddc->dbg_flag)) { 1585 pcis->reusesubmatrices = PETSC_FALSE; 1586 } else { 1587 pcis->reusesubmatrices = PETSC_TRUE; 1588 } 1589 } else { 1590 pcis->reusesubmatrices = PETSC_FALSE; 1591 } 1592 } 1593 1594 /* propagate relevant information -> TODO remove*/ 1595 #if !defined(PETSC_USE_COMPLEX) /* workaround for reals */ 1596 if (matis->A->symmetric_set) { 1597 ierr = MatSetOption(pcbddc->local_mat,MAT_HERMITIAN,matis->A->symmetric);CHKERRQ(ierr); 1598 } 1599 #endif 1600 if (matis->A->symmetric_set) { 1601 ierr = MatSetOption(pcbddc->local_mat,MAT_SYMMETRIC,matis->A->symmetric);CHKERRQ(ierr); 1602 } 1603 if (matis->A->spd_set) { 1604 ierr = MatSetOption(pcbddc->local_mat,MAT_SPD,matis->A->spd);CHKERRQ(ierr); 1605 } 1606 1607 /* Set up all the "iterative substructuring" common block without computing solvers */ 1608 { 1609 Mat temp_mat; 1610 1611 temp_mat = matis->A; 1612 matis->A = pcbddc->local_mat; 1613 ierr = PCISSetUp(pc,PETSC_FALSE);CHKERRQ(ierr); 1614 pcbddc->local_mat = matis->A; 1615 matis->A = temp_mat; 1616 } 1617 1618 /* Analyze interface */ 1619 if (pcbddc->recompute_topography) { 1620 ierr = PCBDDCAnalyzeInterface(pc);CHKERRQ(ierr); 1621 computeconstraintsmatrix = PETSC_TRUE; 1622 if (pcbddc->adaptive_selection && !pcbddc->use_deluxe_scaling && !pcbddc->mat_graph->twodim) { 1623 SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"Cannot compute the adaptive primal space for a problem with 3D edges without deluxe scaling"); 1624 } 1625 if (pcbddc->compute_nonetflux) { 1626 MatNullSpace nnfnnsp; 1627 1628 ierr = PCBDDCComputeNoNetFlux(pc->pmat,pcbddc->divudotp,pcbddc->divudotp_trans,pcbddc->divudotp_vl2l,pcbddc->mat_graph,&nnfnnsp);CHKERRQ(ierr); 1629 /* TODO what if a nearnullspace is already attached? */ 1630 ierr = MatSetNearNullSpace(pc->pmat,nnfnnsp);CHKERRQ(ierr); 1631 ierr = MatNullSpaceDestroy(&nnfnnsp);CHKERRQ(ierr); 1632 } 1633 } 1634 1635 /* check existence of a divergence free extension, i.e. 1636 b(v_I,p_0) = 0 for all v_I (raise error if not). 1637 Also, check that PCBDDCBenignGetOrSetP0 works */ 1638 #if defined(PETSC_USE_DEBUG) 1639 if (pcbddc->benign_saddle_point) { 1640 ierr = PCBDDCBenignCheck(pc,zerodiag);CHKERRQ(ierr); 1641 } 1642 #endif 1643 ierr = ISDestroy(&zerodiag);CHKERRQ(ierr); 1644 1645 /* Setup local dirichlet solver ksp_D and sub_schurs solvers */ 1646 if (computesubschurs && pcbddc->recompute_topography) { 1647 ierr = PCBDDCInitSubSchurs(pc);CHKERRQ(ierr); 1648 } 1649 /* SetUp Scaling operator (scaling matrices could be needed in SubSchursSetUp)*/ 1650 if (!pcbddc->use_deluxe_scaling) { 1651 ierr = PCBDDCScalingSetUp(pc);CHKERRQ(ierr); 1652 } 1653 1654 /* finish setup solvers and do adaptive selection of constraints */ 1655 sub_schurs = pcbddc->sub_schurs; 1656 if (sub_schurs && sub_schurs->schur_explicit) { 1657 if (computesubschurs) { 1658 ierr = PCBDDCSetUpSubSchurs(pc);CHKERRQ(ierr); 1659 } 1660 ierr = PCBDDCSetUpLocalSolvers(pc,PETSC_TRUE,PETSC_FALSE);CHKERRQ(ierr); 1661 } else { 1662 ierr = PCBDDCSetUpLocalSolvers(pc,PETSC_TRUE,PETSC_FALSE);CHKERRQ(ierr); 1663 if (computesubschurs) { 1664 ierr = PCBDDCSetUpSubSchurs(pc);CHKERRQ(ierr); 1665 } 1666 } 1667 if (pcbddc->adaptive_selection) { 1668 ierr = PCBDDCAdaptiveSelection(pc);CHKERRQ(ierr); 1669 computeconstraintsmatrix = PETSC_TRUE; 1670 } 1671 1672 /* infer if NullSpace object attached to Mat via MatSetNearNullSpace has changed */ 1673 new_nearnullspace_provided = PETSC_FALSE; 1674 ierr = MatGetNearNullSpace(pc->pmat,&nearnullspace);CHKERRQ(ierr); 1675 if (pcbddc->onearnullspace) { /* already used nearnullspace */ 1676 if (!nearnullspace) { /* near null space attached to mat has been destroyed */ 1677 new_nearnullspace_provided = PETSC_TRUE; 1678 } else { 1679 /* determine if the two nullspaces are different (should be lightweight) */ 1680 if (nearnullspace != pcbddc->onearnullspace) { 1681 new_nearnullspace_provided = PETSC_TRUE; 1682 } else { /* maybe the user has changed the content of the nearnullspace so check vectors ObjectStateId */ 1683 PetscInt i; 1684 const Vec *nearnullvecs; 1685 PetscObjectState state; 1686 PetscInt nnsp_size; 1687 ierr = MatNullSpaceGetVecs(nearnullspace,NULL,&nnsp_size,&nearnullvecs);CHKERRQ(ierr); 1688 for (i=0;i<nnsp_size;i++) { 1689 ierr = PetscObjectStateGet((PetscObject)nearnullvecs[i],&state);CHKERRQ(ierr); 1690 if (pcbddc->onearnullvecs_state[i] != state) { 1691 new_nearnullspace_provided = PETSC_TRUE; 1692 break; 1693 } 1694 } 1695 } 1696 } 1697 } else { 1698 if (!nearnullspace) { /* both nearnullspaces are null */ 1699 new_nearnullspace_provided = PETSC_FALSE; 1700 } else { /* nearnullspace attached later */ 1701 new_nearnullspace_provided = PETSC_TRUE; 1702 } 1703 } 1704 1705 /* Setup constraints and related work vectors */ 1706 /* reset primal space flags */ 1707 pcbddc->new_primal_space = PETSC_FALSE; 1708 pcbddc->new_primal_space_local = PETSC_FALSE; 1709 if (computeconstraintsmatrix || new_nearnullspace_provided) { 1710 /* It also sets the primal space flags */ 1711 ierr = PCBDDCConstraintsSetUp(pc);CHKERRQ(ierr); 1712 /* Allocate needed local vectors (which depends on quantities defined during ConstraintsSetUp) */ 1713 ierr = PCBDDCSetUpLocalWorkVectors(pc);CHKERRQ(ierr); 1714 } 1715 1716 if (pcbddc->use_change_of_basis) { 1717 PC_IS *pcis = (PC_IS*)(pc->data); 1718 1719 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->ChangeOfBasisMatrix);CHKERRQ(ierr); 1720 if (pcbddc->benign_change) { 1721 ierr = MatDestroy(&pcbddc->benign_B0);CHKERRQ(ierr); 1722 /* pop B0 from pcbddc->local_mat */ 1723 ierr = PCBDDCBenignPopOrPushB0(pc,PETSC_TRUE);CHKERRQ(ierr); 1724 } 1725 /* get submatrices */ 1726 ierr = MatDestroy(&pcis->A_IB);CHKERRQ(ierr); 1727 ierr = MatDestroy(&pcis->A_BI);CHKERRQ(ierr); 1728 ierr = MatDestroy(&pcis->A_BB);CHKERRQ(ierr); 1729 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_BB);CHKERRQ(ierr); 1730 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_I_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_IB);CHKERRQ(ierr); 1731 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_I_local,MAT_INITIAL_MATRIX,&pcis->A_BI);CHKERRQ(ierr); 1732 /* set flag in pcis to not reuse submatrices during PCISCreate */ 1733 pcis->reusesubmatrices = PETSC_FALSE; 1734 } else if (!pcbddc->user_ChangeOfBasisMatrix && !pcbddc->benign_change) { 1735 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1736 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1737 pcbddc->local_mat = matis->A; 1738 } 1739 /* SetUp coarse and local Neumann solvers */ 1740 ierr = PCBDDCSetUpSolvers(pc);CHKERRQ(ierr); 1741 /* SetUp Scaling operator */ 1742 if (pcbddc->use_deluxe_scaling) { 1743 ierr = PCBDDCScalingSetUp(pc);CHKERRQ(ierr); 1744 } 1745 1746 /* mark topography as done */ 1747 pcbddc->recompute_topography = PETSC_FALSE; 1748 1749 /* wrap pcis->A_IB and pcis->A_BI if we did not change explicitly the variables on the pressures */ 1750 ierr = PCBDDCBenignShellMat(pc,PETSC_FALSE);CHKERRQ(ierr); 1751 1752 if (pcbddc->dbg_flag) { 1753 ierr = PetscViewerASCIISubtractTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1754 } 1755 PetscFunctionReturn(0); 1756 } 1757 1758 /* 1759 PCApply_BDDC - Applies the BDDC operator to a vector. 1760 1761 Input Parameters: 1762 + pc - the preconditioner context 1763 - r - input vector (global) 1764 1765 Output Parameter: 1766 . z - output vector (global) 1767 1768 Application Interface Routine: PCApply() 1769 */ 1770 #undef __FUNCT__ 1771 #define __FUNCT__ "PCApply_BDDC" 1772 PetscErrorCode PCApply_BDDC(PC pc,Vec r,Vec z) 1773 { 1774 PC_IS *pcis = (PC_IS*)(pc->data); 1775 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1776 PetscInt n_B = pcis->n_B, n_D = pcis->n - n_B; 1777 PetscErrorCode ierr; 1778 const PetscScalar one = 1.0; 1779 const PetscScalar m_one = -1.0; 1780 const PetscScalar zero = 0.0; 1781 1782 /* This code is similar to that provided in nn.c for PCNN 1783 NN interface preconditioner changed to BDDC 1784 Added support for M_3 preconditioner in the reference article (code is active if pcbddc->switch_static == PETSC_TRUE) */ 1785 1786 PetscFunctionBegin; 1787 if (pcbddc->ChangeOfBasisMatrix) { 1788 Vec swap; 1789 1790 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,r,pcbddc->work_change);CHKERRQ(ierr); 1791 swap = pcbddc->work_change; 1792 pcbddc->work_change = r; 1793 r = swap; 1794 /* save rhs so that we don't need to apply the change of basis for the exact dirichlet trick in PreSolve */ 1795 if (pcbddc->benign_apply_coarse_only && pcbddc->exact_dirichlet_trick_app && pcbddc->change_interior) { 1796 ierr = VecCopy(r,pcis->vec1_global);CHKERRQ(ierr); 1797 ierr = VecLockPush(pcis->vec1_global);CHKERRQ(ierr); 1798 } 1799 } 1800 if (pcbddc->benign_have_null) { /* get p0 from r */ 1801 ierr = PCBDDCBenignGetOrSetP0(pc,r,PETSC_TRUE);CHKERRQ(ierr); 1802 } 1803 if (!pcbddc->exact_dirichlet_trick_app && !pcbddc->benign_apply_coarse_only) { 1804 ierr = VecCopy(r,z);CHKERRQ(ierr); 1805 /* First Dirichlet solve */ 1806 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1807 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1808 /* 1809 Assembling right hand side for BDDC operator 1810 - pcis->vec1_D for the Dirichlet part (if needed, i.e. pcbddc->switch_static == PETSC_TRUE) 1811 - pcis->vec1_B the interface part of the global vector z 1812 */ 1813 if (n_D) { 1814 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1815 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1816 if (pcbddc->switch_static) { 1817 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1818 1819 ierr = VecSet(pcis->vec1_N,0.);CHKERRQ(ierr); 1820 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1821 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1822 if (!pcbddc->switch_static_change) { 1823 ierr = MatMult(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1824 } else { 1825 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1826 ierr = MatMult(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 1827 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1828 } 1829 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1830 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1831 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1832 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1833 } else { 1834 ierr = MatMult(pcis->A_BI,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 1835 } 1836 } else { 1837 ierr = VecSet(pcis->vec1_B,zero);CHKERRQ(ierr); 1838 } 1839 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1840 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1841 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 1842 } else { 1843 if (!pcbddc->benign_apply_coarse_only) { 1844 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 1845 } 1846 } 1847 1848 /* Apply interface preconditioner 1849 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 1850 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_FALSE);CHKERRQ(ierr); 1851 1852 /* Apply transpose of partition of unity operator */ 1853 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 1854 1855 /* Second Dirichlet solve and assembling of output */ 1856 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1857 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1858 if (n_B) { 1859 if (pcbddc->switch_static) { 1860 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1861 1862 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1863 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1864 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1865 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1866 if (!pcbddc->switch_static_change) { 1867 ierr = MatMult(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1868 } else { 1869 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1870 ierr = MatMult(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 1871 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1872 } 1873 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1874 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1875 } else { 1876 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 1877 } 1878 } else if (pcbddc->switch_static) { /* n_B is zero */ 1879 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1880 1881 if (!pcbddc->switch_static_change) { 1882 ierr = MatMult(matis->A,pcis->vec1_D,pcis->vec3_D);CHKERRQ(ierr); 1883 } else { 1884 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_D,pcis->vec1_N);CHKERRQ(ierr); 1885 ierr = MatMult(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1886 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec2_N,pcis->vec3_D);CHKERRQ(ierr); 1887 } 1888 } 1889 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 1890 1891 if (!pcbddc->exact_dirichlet_trick_app && !pcbddc->benign_apply_coarse_only) { 1892 if (pcbddc->switch_static) { 1893 ierr = VecAXPBYPCZ(pcis->vec2_D,m_one,one,m_one,pcis->vec4_D,pcis->vec1_D);CHKERRQ(ierr); 1894 } else { 1895 ierr = VecAXPBY(pcis->vec2_D,m_one,m_one,pcis->vec4_D);CHKERRQ(ierr); 1896 } 1897 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1898 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1899 } else { 1900 if (pcbddc->switch_static) { 1901 ierr = VecAXPBY(pcis->vec4_D,one,m_one,pcis->vec1_D);CHKERRQ(ierr); 1902 } else { 1903 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 1904 } 1905 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1906 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1907 } 1908 if (pcbddc->benign_have_null) { /* set p0 (computed in PCBDDCApplyInterface) */ 1909 if (pcbddc->benign_apply_coarse_only) { 1910 ierr = PetscMemzero(pcbddc->benign_p0,pcbddc->benign_n*sizeof(PetscScalar));CHKERRQ(ierr); 1911 } 1912 ierr = PCBDDCBenignGetOrSetP0(pc,z,PETSC_FALSE);CHKERRQ(ierr); 1913 } 1914 1915 if (pcbddc->ChangeOfBasisMatrix) { 1916 pcbddc->work_change = r; 1917 ierr = VecCopy(z,pcbddc->work_change);CHKERRQ(ierr); 1918 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,pcbddc->work_change,z);CHKERRQ(ierr); 1919 } 1920 PetscFunctionReturn(0); 1921 } 1922 1923 /* 1924 PCApplyTranspose_BDDC - Applies the transpose of the BDDC operator to a vector. 1925 1926 Input Parameters: 1927 + pc - the preconditioner context 1928 - r - input vector (global) 1929 1930 Output Parameter: 1931 . z - output vector (global) 1932 1933 Application Interface Routine: PCApplyTranspose() 1934 */ 1935 #undef __FUNCT__ 1936 #define __FUNCT__ "PCApplyTranspose_BDDC" 1937 PetscErrorCode PCApplyTranspose_BDDC(PC pc,Vec r,Vec z) 1938 { 1939 PC_IS *pcis = (PC_IS*)(pc->data); 1940 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1941 PetscInt n_B = pcis->n_B, n_D = pcis->n - n_B; 1942 PetscErrorCode ierr; 1943 const PetscScalar one = 1.0; 1944 const PetscScalar m_one = -1.0; 1945 const PetscScalar zero = 0.0; 1946 1947 PetscFunctionBegin; 1948 if (pcbddc->ChangeOfBasisMatrix) { 1949 Vec swap; 1950 1951 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,r,pcbddc->work_change);CHKERRQ(ierr); 1952 swap = pcbddc->work_change; 1953 pcbddc->work_change = r; 1954 r = swap; 1955 /* save rhs so that we don't need to apply the change of basis for the exact dirichlet trick in PreSolve */ 1956 if (pcbddc->benign_apply_coarse_only && pcbddc->exact_dirichlet_trick_app && pcbddc->change_interior) { 1957 ierr = VecCopy(r,pcis->vec1_global);CHKERRQ(ierr); 1958 ierr = VecLockPush(pcis->vec1_global);CHKERRQ(ierr); 1959 } 1960 } 1961 if (pcbddc->benign_have_null) { /* get p0 from r */ 1962 ierr = PCBDDCBenignGetOrSetP0(pc,r,PETSC_TRUE);CHKERRQ(ierr); 1963 } 1964 if (!pcbddc->exact_dirichlet_trick_app && !pcbddc->benign_apply_coarse_only) { 1965 ierr = VecCopy(r,z);CHKERRQ(ierr); 1966 /* First Dirichlet solve */ 1967 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1968 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1969 /* 1970 Assembling right hand side for BDDC operator 1971 - pcis->vec1_D for the Dirichlet part (if needed, i.e. pcbddc->switch_static == PETSC_TRUE) 1972 - pcis->vec1_B the interface part of the global vector z 1973 */ 1974 if (n_D) { 1975 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1976 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1977 if (pcbddc->switch_static) { 1978 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1979 1980 ierr = VecSet(pcis->vec1_N,0.);CHKERRQ(ierr); 1981 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1982 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1983 if (!pcbddc->switch_static_change) { 1984 ierr = MatMultTranspose(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1985 } else { 1986 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1987 ierr = MatMultTranspose(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 1988 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1989 } 1990 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1991 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1992 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1993 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1994 } else { 1995 ierr = MatMultTranspose(pcis->A_IB,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 1996 } 1997 } else { 1998 ierr = VecSet(pcis->vec1_B,zero);CHKERRQ(ierr); 1999 } 2000 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2001 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2002 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 2003 } else { 2004 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 2005 } 2006 2007 /* Apply interface preconditioner 2008 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 2009 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_TRUE);CHKERRQ(ierr); 2010 2011 /* Apply transpose of partition of unity operator */ 2012 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 2013 2014 /* Second Dirichlet solve and assembling of output */ 2015 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2016 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2017 if (n_B) { 2018 if (pcbddc->switch_static) { 2019 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 2020 2021 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2022 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2023 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2024 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2025 if (!pcbddc->switch_static_change) { 2026 ierr = MatMultTranspose(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2027 } else { 2028 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2029 ierr = MatMultTranspose(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 2030 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2031 } 2032 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2033 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2034 } else { 2035 ierr = MatMultTranspose(pcis->A_BI,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 2036 } 2037 } else if (pcbddc->switch_static) { /* n_B is zero */ 2038 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 2039 2040 if (!pcbddc->switch_static_change) { 2041 ierr = MatMultTranspose(matis->A,pcis->vec1_D,pcis->vec3_D);CHKERRQ(ierr); 2042 } else { 2043 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_D,pcis->vec1_N);CHKERRQ(ierr); 2044 ierr = MatMultTranspose(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2045 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec2_N,pcis->vec3_D);CHKERRQ(ierr); 2046 } 2047 } 2048 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 2049 if (!pcbddc->exact_dirichlet_trick_app && !pcbddc->benign_apply_coarse_only) { 2050 if (pcbddc->switch_static) { 2051 ierr = VecAXPBYPCZ(pcis->vec2_D,m_one,one,m_one,pcis->vec4_D,pcis->vec1_D);CHKERRQ(ierr); 2052 } else { 2053 ierr = VecAXPBY(pcis->vec2_D,m_one,m_one,pcis->vec4_D);CHKERRQ(ierr); 2054 } 2055 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2056 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2057 } else { 2058 if (pcbddc->switch_static) { 2059 ierr = VecAXPBY(pcis->vec4_D,one,m_one,pcis->vec1_D);CHKERRQ(ierr); 2060 } else { 2061 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 2062 } 2063 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2064 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2065 } 2066 if (pcbddc->benign_have_null) { /* set p0 (computed in PCBDDCApplyInterface) */ 2067 ierr = PCBDDCBenignGetOrSetP0(pc,z,PETSC_FALSE);CHKERRQ(ierr); 2068 } 2069 if (pcbddc->ChangeOfBasisMatrix) { 2070 pcbddc->work_change = r; 2071 ierr = VecCopy(z,pcbddc->work_change);CHKERRQ(ierr); 2072 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,pcbddc->work_change,z);CHKERRQ(ierr); 2073 } 2074 PetscFunctionReturn(0); 2075 } 2076 2077 #undef __FUNCT__ 2078 #define __FUNCT__ "PCDestroy_BDDC" 2079 PetscErrorCode PCDestroy_BDDC(PC pc) 2080 { 2081 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 2082 PetscErrorCode ierr; 2083 2084 PetscFunctionBegin; 2085 /* free BDDC custom data */ 2086 ierr = PCBDDCResetCustomization(pc);CHKERRQ(ierr); 2087 /* destroy objects related to topography */ 2088 ierr = PCBDDCResetTopography(pc);CHKERRQ(ierr); 2089 /* free allocated graph structure */ 2090 ierr = PetscFree(pcbddc->mat_graph);CHKERRQ(ierr); 2091 /* free allocated sub schurs structure */ 2092 ierr = PetscFree(pcbddc->sub_schurs);CHKERRQ(ierr); 2093 /* destroy objects for scaling operator */ 2094 ierr = PCBDDCScalingDestroy(pc);CHKERRQ(ierr); 2095 ierr = PetscFree(pcbddc->deluxe_ctx);CHKERRQ(ierr); 2096 /* free solvers stuff */ 2097 ierr = PCBDDCResetSolvers(pc);CHKERRQ(ierr); 2098 /* free global vectors needed in presolve */ 2099 ierr = VecDestroy(&pcbddc->temp_solution);CHKERRQ(ierr); 2100 ierr = VecDestroy(&pcbddc->original_rhs);CHKERRQ(ierr); 2101 /* free data created by PCIS */ 2102 ierr = PCISDestroy(pc);CHKERRQ(ierr); 2103 /* remove functions */ 2104 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDiscreteGradient_C",NULL);CHKERRQ(ierr); 2105 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDivergenceMat_C",NULL);CHKERRQ(ierr); 2106 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",NULL);CHKERRQ(ierr); 2107 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",NULL);CHKERRQ(ierr); 2108 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesIS_C",NULL);CHKERRQ(ierr); 2109 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",NULL);CHKERRQ(ierr); 2110 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",NULL);CHKERRQ(ierr); 2111 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",NULL);CHKERRQ(ierr); 2112 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",NULL);CHKERRQ(ierr); 2113 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 2114 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 2115 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 2116 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 2117 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 2118 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 2119 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 2120 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 2121 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",NULL);CHKERRQ(ierr); 2122 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",NULL);CHKERRQ(ierr); 2123 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",NULL);CHKERRQ(ierr); 2124 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",NULL);CHKERRQ(ierr); 2125 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",NULL);CHKERRQ(ierr); 2126 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",NULL);CHKERRQ(ierr); 2127 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCPreSolveChangeRHS_C",NULL);CHKERRQ(ierr); 2128 /* Free the private data structure */ 2129 ierr = PetscFree(pc->data);CHKERRQ(ierr); 2130 PetscFunctionReturn(0); 2131 } 2132 2133 #undef __FUNCT__ 2134 #define __FUNCT__ "PCPreSolveChangeRHS_BDDC" 2135 static PetscErrorCode PCPreSolveChangeRHS_BDDC(PC pc, PetscBool* change) 2136 { 2137 PetscFunctionBegin; 2138 *change = PETSC_TRUE; 2139 PetscFunctionReturn(0); 2140 } 2141 2142 #undef __FUNCT__ 2143 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS_BDDC" 2144 static PetscErrorCode PCBDDCMatFETIDPGetRHS_BDDC(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 2145 { 2146 FETIDPMat_ctx mat_ctx; 2147 Vec work; 2148 PC_IS* pcis; 2149 PC_BDDC* pcbddc; 2150 PetscErrorCode ierr; 2151 2152 PetscFunctionBegin; 2153 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2154 pcis = (PC_IS*)mat_ctx->pc->data; 2155 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 2156 2157 /* 2158 change of basis for physical rhs if needed 2159 It also changes the rhs in case of dirichlet boundaries 2160 */ 2161 if (!pcbddc->original_rhs) { 2162 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->original_rhs);CHKERRQ(ierr); 2163 } 2164 ierr = VecCopy(standard_rhs,pcbddc->original_rhs);CHKERRQ(ierr); 2165 ierr = PCPreSolve_BDDC(mat_ctx->pc,NULL,pcbddc->original_rhs,NULL);CHKERRQ(ierr); 2166 if (pcbddc->ChangeOfBasisMatrix) { 2167 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,pcbddc->original_rhs,pcbddc->work_change);CHKERRQ(ierr); 2168 work = pcbddc->work_change; 2169 } else { 2170 work = pcbddc->original_rhs; 2171 } 2172 /* store vectors for computation of fetidp final solution */ 2173 ierr = VecScatterBegin(pcis->global_to_D,work,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2174 ierr = VecScatterEnd(pcis->global_to_D,work,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2175 /* scale rhs since it should be unassembled */ 2176 /* TODO use counter scaling? (also below) */ 2177 ierr = VecScatterBegin(pcis->global_to_B,work,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2178 ierr = VecScatterEnd(pcis->global_to_B,work,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2179 /* Apply partition of unity */ 2180 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 2181 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,work,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 2182 if (!pcbddc->switch_static) { 2183 /* compute partially subassembled Schur complement right-hand side */ 2184 ierr = KSPSolve(pcbddc->ksp_D,mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 2185 ierr = MatMult(pcis->A_BI,pcis->vec1_D,pcis->vec1_B);CHKERRQ(ierr); 2186 ierr = VecAXPY(mat_ctx->temp_solution_B,-1.0,pcis->vec1_B);CHKERRQ(ierr); 2187 ierr = VecSet(work,0.0);CHKERRQ(ierr); 2188 ierr = VecScatterBegin(pcis->global_to_B,mat_ctx->temp_solution_B,work,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2189 ierr = VecScatterEnd(pcis->global_to_B,mat_ctx->temp_solution_B,work,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2190 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,work,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 2191 ierr = VecScatterBegin(pcis->global_to_B,work,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2192 ierr = VecScatterEnd(pcis->global_to_B,work,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2193 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 2194 } 2195 /* BDDC rhs */ 2196 ierr = VecCopy(mat_ctx->temp_solution_B,pcis->vec1_B);CHKERRQ(ierr); 2197 if (pcbddc->switch_static) { 2198 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 2199 } 2200 ierr = PetscMemzero(pcbddc->benign_p0,pcbddc->benign_n*sizeof(PetscScalar));CHKERRQ(ierr); 2201 /* apply BDDC */ 2202 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 2203 ierr = PetscMemzero(pcbddc->benign_p0,pcbddc->benign_n*sizeof(PetscScalar));CHKERRQ(ierr); 2204 /* Application of B_delta and assembling of rhs for fetidp fluxes */ 2205 ierr = VecSet(fetidp_flux_rhs,0.0);CHKERRQ(ierr); 2206 ierr = MatMult(mat_ctx->B_delta,pcis->vec1_B,mat_ctx->lambda_local);CHKERRQ(ierr); 2207 ierr = VecScatterBegin(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2208 ierr = VecScatterEnd(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2209 PetscFunctionReturn(0); 2210 } 2211 2212 #undef __FUNCT__ 2213 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS" 2214 /*@ 2215 PCBDDCMatFETIDPGetRHS - Compute the right-hand side for FETI-DP linear system using the physical right-hand side 2216 2217 Collective 2218 2219 Input Parameters: 2220 + fetidp_mat - the FETI-DP matrix object obtained by a call to PCBDDCCreateFETIDPOperators 2221 - standard_rhs - the right-hand side of the original linear system 2222 2223 Output Parameters: 2224 . fetidp_flux_rhs - the right-hand side for the FETI-DP linear system 2225 2226 Level: developer 2227 2228 Notes: 2229 2230 .seealso: PCBDDC, PCBDDCCreateFETIDPOperators, PCBDDCMatFETIDPGetSolution 2231 @*/ 2232 PetscErrorCode PCBDDCMatFETIDPGetRHS(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 2233 { 2234 FETIDPMat_ctx mat_ctx; 2235 PetscErrorCode ierr; 2236 2237 PetscFunctionBegin; 2238 PetscValidHeaderSpecific(fetidp_mat,MAT_CLASSID,1); 2239 PetscValidHeaderSpecific(standard_rhs,VEC_CLASSID,2); 2240 PetscValidHeaderSpecific(fetidp_flux_rhs,VEC_CLASSID,3); 2241 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2242 ierr = PetscUseMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetRHS_C",(Mat,Vec,Vec),(fetidp_mat,standard_rhs,fetidp_flux_rhs));CHKERRQ(ierr); 2243 PetscFunctionReturn(0); 2244 } 2245 2246 #undef __FUNCT__ 2247 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution_BDDC" 2248 static PetscErrorCode PCBDDCMatFETIDPGetSolution_BDDC(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 2249 { 2250 FETIDPMat_ctx mat_ctx; 2251 PC_IS* pcis; 2252 PC_BDDC* pcbddc; 2253 PetscErrorCode ierr; 2254 2255 PetscFunctionBegin; 2256 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2257 pcis = (PC_IS*)mat_ctx->pc->data; 2258 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 2259 2260 /* apply B_delta^T */ 2261 ierr = VecScatterBegin(mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2262 ierr = VecScatterEnd(mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2263 ierr = MatMultTranspose(mat_ctx->B_delta,mat_ctx->lambda_local,pcis->vec1_B);CHKERRQ(ierr); 2264 /* compute rhs for BDDC application */ 2265 ierr = VecAYPX(pcis->vec1_B,-1.0,mat_ctx->temp_solution_B);CHKERRQ(ierr); 2266 if (pcbddc->switch_static) { 2267 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 2268 } 2269 ierr = PetscMemzero(pcbddc->benign_p0,pcbddc->benign_n*sizeof(PetscScalar));CHKERRQ(ierr); 2270 /* apply BDDC */ 2271 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 2272 /* put values into standard global vector */ 2273 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2274 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2275 if (!pcbddc->switch_static) { 2276 /* compute values into the interior if solved for the partially subassembled Schur complement */ 2277 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec1_D);CHKERRQ(ierr); 2278 ierr = VecAYPX(pcis->vec1_D,-1.0,mat_ctx->temp_solution_D);CHKERRQ(ierr); 2279 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec1_D);CHKERRQ(ierr); 2280 } 2281 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2282 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2283 /* add p0 solution to final solution */ 2284 ierr = PCBDDCBenignGetOrSetP0(mat_ctx->pc,standard_sol,PETSC_FALSE);CHKERRQ(ierr); 2285 if (pcbddc->ChangeOfBasisMatrix) { 2286 Vec v2; 2287 ierr = VecDuplicate(standard_sol,&v2);CHKERRQ(ierr); 2288 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,standard_sol,v2);CHKERRQ(ierr); 2289 ierr = VecCopy(v2,standard_sol);CHKERRQ(ierr); 2290 ierr = VecDestroy(&v2);CHKERRQ(ierr); 2291 } 2292 ierr = PCPostSolve_BDDC(mat_ctx->pc,NULL,NULL,standard_sol);CHKERRQ(ierr); 2293 PetscFunctionReturn(0); 2294 } 2295 2296 #undef __FUNCT__ 2297 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution" 2298 /*@ 2299 PCBDDCMatFETIDPGetSolution - Compute the physical solution using the solution of the FETI-DP linear system 2300 2301 Collective 2302 2303 Input Parameters: 2304 + fetidp_mat - the FETI-DP matrix obtained by a call to PCBDDCCreateFETIDPOperators 2305 - fetidp_flux_sol - the solution of the FETI-DP linear system 2306 2307 Output Parameters: 2308 . standard_sol - the solution defined on the physical domain 2309 2310 Level: developer 2311 2312 Notes: 2313 2314 .seealso: PCBDDC, PCBDDCCreateFETIDPOperators, PCBDDCMatFETIDPGetRHS 2315 @*/ 2316 PetscErrorCode PCBDDCMatFETIDPGetSolution(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 2317 { 2318 FETIDPMat_ctx mat_ctx; 2319 PetscErrorCode ierr; 2320 2321 PetscFunctionBegin; 2322 PetscValidHeaderSpecific(fetidp_mat,MAT_CLASSID,1); 2323 PetscValidHeaderSpecific(fetidp_flux_sol,VEC_CLASSID,2); 2324 PetscValidHeaderSpecific(standard_sol,VEC_CLASSID,3); 2325 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2326 ierr = PetscUseMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetSolution_C",(Mat,Vec,Vec),(fetidp_mat,fetidp_flux_sol,standard_sol));CHKERRQ(ierr); 2327 PetscFunctionReturn(0); 2328 } 2329 2330 extern PetscErrorCode FETIDPMatMult(Mat,Vec,Vec); 2331 extern PetscErrorCode FETIDPMatMultTranspose(Mat,Vec,Vec); 2332 extern PetscErrorCode PCBDDCDestroyFETIDPMat(Mat); 2333 extern PetscErrorCode FETIDPPCApply(PC,Vec,Vec); 2334 extern PetscErrorCode FETIDPPCApplyTranspose(PC,Vec,Vec); 2335 extern PetscErrorCode PCBDDCDestroyFETIDPPC(PC); 2336 2337 #undef __FUNCT__ 2338 #define __FUNCT__ "PCBDDCCreateFETIDPOperators_BDDC" 2339 static PetscErrorCode PCBDDCCreateFETIDPOperators_BDDC(PC pc, PetscBool fully_redundant, Mat *fetidp_mat, PC *fetidp_pc) 2340 { 2341 2342 FETIDPMat_ctx fetidpmat_ctx; 2343 Mat newmat; 2344 FETIDPPC_ctx fetidppc_ctx; 2345 PC newpc; 2346 MPI_Comm comm; 2347 PetscErrorCode ierr; 2348 2349 PetscFunctionBegin; 2350 ierr = PetscObjectGetComm((PetscObject)pc,&comm);CHKERRQ(ierr); 2351 /* FETIDP linear matrix */ 2352 ierr = PCBDDCCreateFETIDPMatContext(pc,&fetidpmat_ctx);CHKERRQ(ierr); 2353 fetidpmat_ctx->fully_redundant = fully_redundant; 2354 ierr = PCBDDCSetupFETIDPMatContext(fetidpmat_ctx);CHKERRQ(ierr); 2355 ierr = MatCreateShell(comm,PETSC_DECIDE,PETSC_DECIDE,fetidpmat_ctx->n_lambda,fetidpmat_ctx->n_lambda,fetidpmat_ctx,&newmat);CHKERRQ(ierr); 2356 ierr = MatShellSetOperation(newmat,MATOP_MULT,(void (*)(void))FETIDPMatMult);CHKERRQ(ierr); 2357 ierr = MatShellSetOperation(newmat,MATOP_MULT_TRANSPOSE,(void (*)(void))FETIDPMatMultTranspose);CHKERRQ(ierr); 2358 ierr = MatShellSetOperation(newmat,MATOP_DESTROY,(void (*)(void))PCBDDCDestroyFETIDPMat);CHKERRQ(ierr); 2359 ierr = MatSetUp(newmat);CHKERRQ(ierr); 2360 /* FETIDP preconditioner */ 2361 ierr = PCBDDCCreateFETIDPPCContext(pc,&fetidppc_ctx);CHKERRQ(ierr); 2362 ierr = PCBDDCSetupFETIDPPCContext(newmat,fetidppc_ctx);CHKERRQ(ierr); 2363 ierr = PCCreate(comm,&newpc);CHKERRQ(ierr); 2364 ierr = PCSetType(newpc,PCSHELL);CHKERRQ(ierr); 2365 ierr = PCShellSetContext(newpc,fetidppc_ctx);CHKERRQ(ierr); 2366 ierr = PCShellSetApply(newpc,FETIDPPCApply);CHKERRQ(ierr); 2367 ierr = PCShellSetApplyTranspose(newpc,FETIDPPCApplyTranspose);CHKERRQ(ierr); 2368 ierr = PCShellSetDestroy(newpc,PCBDDCDestroyFETIDPPC);CHKERRQ(ierr); 2369 ierr = PCSetOperators(newpc,newmat,newmat);CHKERRQ(ierr); 2370 ierr = PCSetUp(newpc);CHKERRQ(ierr); 2371 /* return pointers for objects created */ 2372 *fetidp_mat=newmat; 2373 *fetidp_pc=newpc; 2374 PetscFunctionReturn(0); 2375 } 2376 2377 #undef __FUNCT__ 2378 #define __FUNCT__ "PCBDDCCreateFETIDPOperators" 2379 /*@ 2380 PCBDDCCreateFETIDPOperators - Create FETI-DP operators 2381 2382 Collective 2383 2384 Input Parameters: 2385 + pc - the BDDC preconditioning context (setup should have been called before) 2386 - fully_redundant - true for a fully redundant set of Lagrange multipliers 2387 2388 Output Parameters: 2389 + fetidp_mat - shell FETI-DP matrix object 2390 - fetidp_pc - shell Dirichlet preconditioner for FETI-DP matrix 2391 2392 Level: developer 2393 2394 Notes: 2395 Currently the only operations provided for FETI-DP matrix are MatMult and MatMultTranspose 2396 2397 .seealso: PCBDDC, PCBDDCMatFETIDPGetRHS, PCBDDCMatFETIDPGetSolution 2398 @*/ 2399 PetscErrorCode PCBDDCCreateFETIDPOperators(PC pc, PetscBool fully_redundant, Mat *fetidp_mat, PC *fetidp_pc) 2400 { 2401 PetscErrorCode ierr; 2402 2403 PetscFunctionBegin; 2404 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 2405 if (pc->setupcalled) { 2406 ierr = PetscUseMethod(pc,"PCBDDCCreateFETIDPOperators_C",(PC,PetscBool,Mat*,PC*),(pc,fully_redundant,fetidp_mat,fetidp_pc));CHKERRQ(ierr); 2407 } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"You must call PCSetup_BDDC() first \n"); 2408 PetscFunctionReturn(0); 2409 } 2410 /* -------------------------------------------------------------------------- */ 2411 /*MC 2412 PCBDDC - Balancing Domain Decomposition by Constraints. 2413 2414 An implementation of the BDDC preconditioner based on 2415 2416 .vb 2417 [1] C. R. Dohrmann. "An approximate BDDC preconditioner", Numerical Linear Algebra with Applications Volume 14, Issue 2, pages 149-168, March 2007 2418 [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 2419 [3] J. Mandel, B. Sousedik, C. R. Dohrmann. "Multispace and Multilevel BDDC", http://arxiv.org/abs/0712.3977 2420 [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 2421 .ve 2422 2423 The matrix to be preconditioned (Pmat) must be of type MATIS. 2424 2425 Currently works with MATIS matrices with local matrices of type MATSEQAIJ, MATSEQBAIJ or MATSEQSBAIJ, either with real or complex numbers. 2426 2427 It also works with unsymmetric and indefinite problems. 2428 2429 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. 2430 2431 Approximate local solvers are automatically adapted (see [1]) if the user has attached a nullspace object to the subdomain matrices, and informed BDDC of using approximate solvers (via the command line). 2432 2433 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() 2434 Additional information on dofs can be provided by using PCBDDCSetDofsSplitting(), PCBDDCSetDirichletBoundaries(), PCBDDCSetNeumannBoundaries(), and PCBDDCSetPrimalVerticesIS() and their local counterparts. 2435 2436 Constraints can be customized by attaching a MatNullSpace object to the MATIS matrix via MatSetNearNullSpace(). Non-singular modes are retained via SVD. 2437 2438 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. 2439 User defined change of basis can be passed to PCBDDC by using PCBDDCSetChangeOfBasisMat() 2440 2441 The PETSc implementation also supports multilevel BDDC [3]. Coarse grids are partitioned using a MatPartitioning object. 2442 2443 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. 2444 2445 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. 2446 Deluxe scaling is not supported yet for FETI-DP. 2447 2448 Options Database Keys (some of them, run with -h for a complete list): 2449 2450 . -pc_bddc_use_vertices <true> - use or not vertices in primal space 2451 . -pc_bddc_use_edges <true> - use or not edges in primal space 2452 . -pc_bddc_use_faces <false> - use or not faces in primal space 2453 . -pc_bddc_symmetric <true> - symmetric computation of primal basis functions. Specify false for unsymmetric problems 2454 . -pc_bddc_use_change_of_basis <false> - use change of basis approach (on edges only) 2455 . -pc_bddc_use_change_on_faces <false> - use change of basis approach on faces if change of basis has been requested 2456 . -pc_bddc_switch_static <false> - switches from M_2 (default) to M_3 operator (see reference article [1]) 2457 . -pc_bddc_levels <0> - maximum number of levels for multilevel 2458 . -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) 2459 . -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) 2460 . -pc_bddc_use_deluxe_scaling <false> - use deluxe scaling 2461 . -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) 2462 . -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) 2463 - -pc_bddc_check_level <0> - set verbosity level of debugging output 2464 2465 Options for Dirichlet, Neumann or coarse solver can be set with 2466 .vb 2467 -pc_bddc_dirichlet_ 2468 -pc_bddc_neumann_ 2469 -pc_bddc_coarse_ 2470 .ve 2471 e.g -pc_bddc_dirichlet_ksp_type richardson -pc_bddc_dirichlet_pc_type gamg. PCBDDC uses by default KPSPREONLY and PCLU. 2472 2473 When using a multilevel approach, solvers' options at the N-th level (N > 1) can be specified as 2474 .vb 2475 -pc_bddc_dirichlet_lN_ 2476 -pc_bddc_neumann_lN_ 2477 -pc_bddc_coarse_lN_ 2478 .ve 2479 Note that level number ranges from the finest (0) to the coarsest (N). 2480 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. 2481 .vb 2482 -pc_bddc_coarse_pc_bddc_adaptive_threshold 5 -pc_bddc_coarse_l1_pc_bddc_redistribute 3 2483 .ve 2484 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 2485 2486 Level: intermediate 2487 2488 Developer notes: 2489 2490 Contributed by Stefano Zampini 2491 2492 .seealso: PCCreate(), PCSetType(), PCType (for list of available types), PC, MATIS 2493 M*/ 2494 2495 #undef __FUNCT__ 2496 #define __FUNCT__ "PCCreate_BDDC" 2497 PETSC_EXTERN PetscErrorCode PCCreate_BDDC(PC pc) 2498 { 2499 PetscErrorCode ierr; 2500 PC_BDDC *pcbddc; 2501 2502 PetscFunctionBegin; 2503 /* Creates the private data structure for this preconditioner and attach it to the PC object. */ 2504 ierr = PetscNewLog(pc,&pcbddc);CHKERRQ(ierr); 2505 pc->data = (void*)pcbddc; 2506 2507 /* create PCIS data structure */ 2508 ierr = PCISCreate(pc);CHKERRQ(ierr); 2509 2510 /* BDDC customization */ 2511 pcbddc->use_local_adj = PETSC_TRUE; 2512 pcbddc->use_vertices = PETSC_TRUE; 2513 pcbddc->use_edges = PETSC_TRUE; 2514 pcbddc->use_faces = PETSC_FALSE; 2515 pcbddc->use_change_of_basis = PETSC_FALSE; 2516 pcbddc->use_change_on_faces = PETSC_FALSE; 2517 pcbddc->switch_static = PETSC_FALSE; 2518 pcbddc->use_nnsp_true = PETSC_FALSE; 2519 pcbddc->use_qr_single = PETSC_FALSE; 2520 pcbddc->symmetric_primal = PETSC_TRUE; 2521 pcbddc->benign_saddle_point = PETSC_FALSE; 2522 pcbddc->benign_have_null = PETSC_FALSE; 2523 pcbddc->vertex_size = 1; 2524 pcbddc->dbg_flag = 0; 2525 /* private */ 2526 pcbddc->local_primal_size = 0; 2527 pcbddc->local_primal_size_cc = 0; 2528 pcbddc->local_primal_ref_node = 0; 2529 pcbddc->local_primal_ref_mult = 0; 2530 pcbddc->n_vertices = 0; 2531 pcbddc->primal_indices_local_idxs = 0; 2532 pcbddc->recompute_topography = PETSC_TRUE; 2533 pcbddc->coarse_size = -1; 2534 pcbddc->new_primal_space = PETSC_FALSE; 2535 pcbddc->new_primal_space_local = PETSC_FALSE; 2536 pcbddc->global_primal_indices = 0; 2537 pcbddc->onearnullspace = 0; 2538 pcbddc->onearnullvecs_state = 0; 2539 pcbddc->user_primal_vertices = 0; 2540 pcbddc->user_primal_vertices_local = 0; 2541 pcbddc->temp_solution = 0; 2542 pcbddc->original_rhs = 0; 2543 pcbddc->local_mat = 0; 2544 pcbddc->ChangeOfBasisMatrix = 0; 2545 pcbddc->user_ChangeOfBasisMatrix = 0; 2546 pcbddc->coarse_vec = 0; 2547 pcbddc->coarse_ksp = 0; 2548 pcbddc->coarse_phi_B = 0; 2549 pcbddc->coarse_phi_D = 0; 2550 pcbddc->coarse_psi_B = 0; 2551 pcbddc->coarse_psi_D = 0; 2552 pcbddc->vec1_P = 0; 2553 pcbddc->vec1_R = 0; 2554 pcbddc->vec2_R = 0; 2555 pcbddc->local_auxmat1 = 0; 2556 pcbddc->local_auxmat2 = 0; 2557 pcbddc->R_to_B = 0; 2558 pcbddc->R_to_D = 0; 2559 pcbddc->ksp_D = 0; 2560 pcbddc->ksp_R = 0; 2561 pcbddc->NeumannBoundaries = 0; 2562 pcbddc->NeumannBoundariesLocal = 0; 2563 pcbddc->DirichletBoundaries = 0; 2564 pcbddc->DirichletBoundariesLocal = 0; 2565 pcbddc->user_provided_isfordofs = PETSC_FALSE; 2566 pcbddc->n_ISForDofs = 0; 2567 pcbddc->n_ISForDofsLocal = 0; 2568 pcbddc->ISForDofs = 0; 2569 pcbddc->ISForDofsLocal = 0; 2570 pcbddc->ConstraintMatrix = 0; 2571 pcbddc->use_exact_dirichlet_trick = PETSC_TRUE; 2572 pcbddc->exact_dirichlet_trick_app = PETSC_FALSE; 2573 pcbddc->coarse_loc_to_glob = 0; 2574 pcbddc->coarsening_ratio = 8; 2575 pcbddc->coarse_adj_red = 0; 2576 pcbddc->current_level = 0; 2577 pcbddc->max_levels = 0; 2578 pcbddc->use_coarse_estimates = PETSC_FALSE; 2579 pcbddc->coarse_eqs_per_proc = 1; 2580 pcbddc->coarse_subassembling = 0; 2581 pcbddc->detect_disconnected = PETSC_FALSE; 2582 pcbddc->n_local_subs = 0; 2583 pcbddc->local_subs = NULL; 2584 2585 /* benign subspace trick */ 2586 pcbddc->benign_change = 0; 2587 pcbddc->benign_compute_correction = PETSC_TRUE; 2588 pcbddc->benign_vec = 0; 2589 pcbddc->benign_original_mat = 0; 2590 pcbddc->benign_sf = 0; 2591 pcbddc->benign_B0 = 0; 2592 pcbddc->benign_n = 0; 2593 pcbddc->benign_p0 = NULL; 2594 pcbddc->benign_p0_lidx = NULL; 2595 pcbddc->benign_p0_gidx = NULL; 2596 pcbddc->benign_null = PETSC_FALSE; 2597 2598 /* create local graph structure */ 2599 ierr = PCBDDCGraphCreate(&pcbddc->mat_graph);CHKERRQ(ierr); 2600 pcbddc->graphmaxcount = PETSC_MAX_INT; 2601 2602 /* scaling */ 2603 pcbddc->work_scaling = 0; 2604 pcbddc->use_deluxe_scaling = PETSC_FALSE; 2605 2606 /* sub schurs options */ 2607 pcbddc->sub_schurs_rebuild = PETSC_FALSE; 2608 pcbddc->sub_schurs_layers = -1; 2609 pcbddc->sub_schurs_use_useradj = PETSC_FALSE; 2610 2611 pcbddc->computed_rowadj = PETSC_FALSE; 2612 2613 /* adaptivity */ 2614 pcbddc->adaptive_threshold = 0.0; 2615 pcbddc->adaptive_nmax = 0; 2616 pcbddc->adaptive_nmin = 0; 2617 2618 /* function pointers */ 2619 pc->ops->apply = PCApply_BDDC; 2620 pc->ops->applytranspose = PCApplyTranspose_BDDC; 2621 pc->ops->setup = PCSetUp_BDDC; 2622 pc->ops->destroy = PCDestroy_BDDC; 2623 pc->ops->setfromoptions = PCSetFromOptions_BDDC; 2624 pc->ops->view = PCView_BDDC; 2625 pc->ops->applyrichardson = 0; 2626 pc->ops->applysymmetricleft = 0; 2627 pc->ops->applysymmetricright = 0; 2628 pc->ops->presolve = PCPreSolve_BDDC; 2629 pc->ops->postsolve = PCPostSolve_BDDC; 2630 2631 /* composing function */ 2632 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDiscreteGradient_C",PCBDDCSetDiscreteGradient_BDDC);CHKERRQ(ierr); 2633 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDivergenceMat_C",PCBDDCSetDivergenceMat_BDDC);CHKERRQ(ierr); 2634 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",PCBDDCSetChangeOfBasisMat_BDDC);CHKERRQ(ierr); 2635 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",PCBDDCSetPrimalVerticesLocalIS_BDDC);CHKERRQ(ierr); 2636 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesIS_C",PCBDDCSetPrimalVerticesIS_BDDC);CHKERRQ(ierr); 2637 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",PCBDDCSetCoarseningRatio_BDDC);CHKERRQ(ierr); 2638 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",PCBDDCSetLevel_BDDC);CHKERRQ(ierr); 2639 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",PCBDDCSetUseExactDirichlet_BDDC);CHKERRQ(ierr); 2640 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",PCBDDCSetLevels_BDDC);CHKERRQ(ierr); 2641 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",PCBDDCSetDirichletBoundaries_BDDC);CHKERRQ(ierr); 2642 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",PCBDDCSetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 2643 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",PCBDDCSetNeumannBoundaries_BDDC);CHKERRQ(ierr); 2644 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",PCBDDCSetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 2645 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",PCBDDCGetDirichletBoundaries_BDDC);CHKERRQ(ierr); 2646 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",PCBDDCGetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 2647 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",PCBDDCGetNeumannBoundaries_BDDC);CHKERRQ(ierr); 2648 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",PCBDDCGetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 2649 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",PCBDDCSetDofsSplitting_BDDC);CHKERRQ(ierr); 2650 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",PCBDDCSetDofsSplittingLocal_BDDC);CHKERRQ(ierr); 2651 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",PCBDDCSetLocalAdjacencyGraph_BDDC);CHKERRQ(ierr); 2652 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",PCBDDCCreateFETIDPOperators_BDDC);CHKERRQ(ierr); 2653 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",PCBDDCMatFETIDPGetRHS_BDDC);CHKERRQ(ierr); 2654 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",PCBDDCMatFETIDPGetSolution_BDDC);CHKERRQ(ierr); 2655 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCPreSolveChangeRHS_C",PCPreSolveChangeRHS_BDDC);CHKERRQ(ierr); 2656 PetscFunctionReturn(0); 2657 } 2658 2659