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[7],gsum[6],gmax[6],gmin[6],totbenign; 107 PetscScalar interface_size; 108 PetscReal ratio1=0.,ratio2=0.; 109 Vec counter; 110 111 if (!pc->setupcalled) { 112 ierr = PetscViewerASCIIPrintf(viewer," Partial information available: preconditioner has not been setup yet\n");CHKERRQ(ierr); 113 } 114 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use verbose output: %d\n",pcbddc->dbg_flag);CHKERRQ(ierr); 115 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use user-defined CSR: %d\n",!!pcbddc->mat_graph->nvtxs_csr);CHKERRQ(ierr); 116 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use local mat graph: %d\n",pcbddc->use_local_adj && !pcbddc->mat_graph->nvtxs_csr);CHKERRQ(ierr); 117 if (pcbddc->mat_graph->twodim) { 118 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Connectivity graph topological dimension: 2\n");CHKERRQ(ierr); 119 } else { 120 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Connectivity graph topological dimension: 3\n");CHKERRQ(ierr); 121 } 122 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Graph max count: %d\n",pcbddc->graphmaxcount);CHKERRQ(ierr); 123 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use vertices: %d (vertex size %d)\n",pcbddc->use_vertices,pcbddc->vertex_size);CHKERRQ(ierr); 124 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use edges: %d\n",pcbddc->use_edges);CHKERRQ(ierr); 125 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use faces: %d\n",pcbddc->use_faces);CHKERRQ(ierr); 126 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use true near null space: %d\n",pcbddc->use_nnsp_true);CHKERRQ(ierr); 127 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use QR for single constraints on cc: %d\n",pcbddc->use_qr_single);CHKERRQ(ierr); 128 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use change of basis on local edge nodes: %d\n",pcbddc->use_change_of_basis);CHKERRQ(ierr); 129 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use change of basis on local face nodes: %d\n",pcbddc->use_change_on_faces);CHKERRQ(ierr); 130 ierr = PetscViewerASCIIPrintf(viewer," BDDC: User defined change of basis matrix: %d\n",!!pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 131 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Has change of basis matrix: %d\n",!!pcbddc->ChangeOfBasisMatrix);CHKERRQ(ierr); 132 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Eliminate dirichlet boundary dofs: %d\n",pcbddc->eliminate_dirdofs);CHKERRQ(ierr); 133 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Switch on static condensation ops around the interface preconditioner: %d\n",pcbddc->switch_static);CHKERRQ(ierr); 134 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use exact dirichlet trick: %d\n",pcbddc->use_exact_dirichlet_trick);CHKERRQ(ierr); 135 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Multilevel max levels: %d\n",pcbddc->max_levels);CHKERRQ(ierr); 136 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Multilevel coarsening ratio: %d\n",pcbddc->coarsening_ratio);CHKERRQ(ierr); 137 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use estimated eigs for coarse problem: %d\n",pcbddc->use_coarse_estimates);CHKERRQ(ierr); 138 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use deluxe scaling: %d\n",pcbddc->use_deluxe_scaling);CHKERRQ(ierr); 139 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use deluxe zerorows: %d\n",pcbddc->deluxe_zerorows);CHKERRQ(ierr); 140 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Rebuild interface graph for Schur principal minors: %d\n",pcbddc->sub_schurs_rebuild);CHKERRQ(ierr); 141 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Number of dofs' layers for the computation of principal minors: %d\n",pcbddc->sub_schurs_layers);CHKERRQ(ierr); 142 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Use user CSR graph to compute successive layers: %d\n",pcbddc->sub_schurs_use_useradj);CHKERRQ(ierr); 143 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); 144 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Min constraints / connected component: %d\n",pcbddc->adaptive_nmin);CHKERRQ(ierr); 145 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Max constraints / connected component: %d\n",pcbddc->adaptive_nmax);CHKERRQ(ierr); 146 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Invert exact Schur complement for adaptive selection: %d\n",pcbddc->sub_schurs_exact_schur);CHKERRQ(ierr); 147 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Symmetric computation of primal basis functions: %d\n",pcbddc->symmetric_primal);CHKERRQ(ierr); 148 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Num. Procs. to map coarse adjacency list: %d\n",pcbddc->coarse_adj_red);CHKERRQ(ierr); 149 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Coarse eqs per proc (significant at the coarsest level): %d\n",pcbddc->coarse_eqs_per_proc);CHKERRQ(ierr); 150 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Detect disconnected: %d\n",pcbddc->detect_disconnected);CHKERRQ(ierr); 151 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Benign subspace trick: %d (change explicit %d)\n",pcbddc->benign_saddle_point,pcbddc->benign_change_explicit);CHKERRQ(ierr); 152 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Benign subspace trick is active: %d\n",pcbddc->benign_have_null);CHKERRQ(ierr); 153 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Algebraic computation of no-net-flux %d\n",pcbddc->compute_nonetflux);CHKERRQ(ierr); 154 if (!pc->setupcalled) PetscFunctionReturn(0); 155 156 /* compute interface size */ 157 ierr = VecSet(pcis->vec1_B,1.0);CHKERRQ(ierr); 158 ierr = MatCreateVecs(pc->pmat,&counter,0);CHKERRQ(ierr); 159 ierr = VecSet(counter,0.0);CHKERRQ(ierr); 160 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,counter,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 161 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,counter,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 162 ierr = VecSum(counter,&interface_size);CHKERRQ(ierr); 163 ierr = VecDestroy(&counter);CHKERRQ(ierr); 164 165 /* compute some statistics on the domain decomposition */ 166 gsum[0] = 1; 167 gsum[1] = gsum[2] = gsum[3] = gsum[4] = gsum[5] = 0; 168 loc[0] = !!pcis->n; 169 loc[1] = pcis->n - pcis->n_B; 170 loc[2] = pcis->n_B; 171 loc[3] = pcbddc->local_primal_size; 172 loc[4] = pcis->n; 173 loc[5] = pcbddc->n_local_subs > 0 ? pcbddc->n_local_subs : (pcis->n ? 1 : 0); 174 loc[6] = pcbddc->benign_n; 175 ierr = MPI_Reduce(loc,gsum,6,MPIU_INT64,MPI_SUM,0,PetscObjectComm((PetscObject)pc));CHKERRQ(ierr); 176 if (!loc[0]) loc[1] = loc[2] = loc[3] = loc[4] = loc[5] = -1; 177 ierr = MPI_Reduce(loc,gmax,6,MPIU_INT64,MPI_MAX,0,PetscObjectComm((PetscObject)pc));CHKERRQ(ierr); 178 if (!loc[0]) loc[1] = loc[2] = loc[3] = loc[4] = loc[5] = PETSC_MAX_INT; 179 ierr = MPI_Reduce(loc,gmin,6,MPIU_INT64,MPI_MIN,0,PetscObjectComm((PetscObject)pc));CHKERRQ(ierr); 180 ierr = MPI_Reduce(&loc[6],&totbenign,1,MPIU_INT64,MPI_SUM,0,PetscObjectComm((PetscObject)pc));CHKERRQ(ierr); 181 if (pcbddc->coarse_size) { 182 ratio1 = pc->pmat->rmap->N/(1.*pcbddc->coarse_size); 183 ratio2 = PetscRealPart(interface_size)/pcbddc->coarse_size; 184 } 185 ierr = PetscViewerASCIIPrintf(viewer," BDDC: ********************************** STATISTICS AT LEVEL %d **********************************\n",pcbddc->current_level);CHKERRQ(ierr); 186 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); 187 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Coarsening ratios: all/coarse %d interface/coarse %d\n",(PetscInt)ratio1,(PetscInt)ratio2);CHKERRQ(ierr); 188 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Active processes : %d\n",(PetscInt)gsum[0]);CHKERRQ(ierr); 189 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Total subdomains : %d\n",(PetscInt)gsum[5]);CHKERRQ(ierr); 190 if (pcbddc->benign_have_null) { 191 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Benign subs : %d\n",(PetscInt)totbenign);CHKERRQ(ierr); 192 } 193 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Dofs type :\tMIN\tMAX\tMEAN\n",(PetscInt)gmin[1],(PetscInt)gmax[1],(PetscInt)(gsum[1]/gsum[0]));CHKERRQ(ierr); 194 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); 195 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); 196 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); 197 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); 198 ierr = PetscViewerASCIIPrintf(viewer," BDDC: Local subs :\t%d\t%d\n",(PetscInt)gmin[5],(PetscInt)gmax[5]);CHKERRQ(ierr); 199 ierr = PetscViewerASCIIPrintf(viewer," BDDC: ********************************** COARSE PROBLEM DETAILS *********************************\n",pcbddc->current_level);CHKERRQ(ierr); 200 ierr = PetscViewerFlush(viewer);CHKERRQ(ierr); 201 202 /* the coarse problem can be handled by a different communicator */ 203 if (pcbddc->coarse_ksp) color = 1; 204 else color = 0; 205 ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)pc),&rank);CHKERRQ(ierr); 206 ierr = MPI_Comm_size(PetscObjectComm((PetscObject)pc),&size);CHKERRQ(ierr); 207 ierr = PetscSubcommCreate(PetscObjectComm((PetscObject)pc),&subcomm);CHKERRQ(ierr); 208 ierr = PetscSubcommSetNumber(subcomm,PetscMin(size,2));CHKERRQ(ierr); 209 ierr = PetscSubcommSetTypeGeneral(subcomm,color,rank);CHKERRQ(ierr); 210 ierr = PetscViewerGetSubViewer(viewer,PetscSubcommChild(subcomm),&subviewer);CHKERRQ(ierr); 211 if (color == 1) { 212 ierr = KSPView(pcbddc->coarse_ksp,subviewer);CHKERRQ(ierr); 213 ierr = PetscViewerFlush(subviewer);CHKERRQ(ierr); 214 } 215 ierr = PetscViewerRestoreSubViewer(viewer,PetscSubcommChild(subcomm),&subviewer);CHKERRQ(ierr); 216 ierr = PetscSubcommDestroy(&subcomm);CHKERRQ(ierr); 217 ierr = PetscViewerFlush(viewer);CHKERRQ(ierr); 218 } 219 PetscFunctionReturn(0); 220 } 221 222 #undef __FUNCT__ 223 #define __FUNCT__ "PCBDDCSetDiscreteGradient_BDDC" 224 static PetscErrorCode PCBDDCSetDiscreteGradient_BDDC(PC pc, Mat G, PetscInt order, PetscInt field, PetscBool global, PetscBool conforming) 225 { 226 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 227 PetscErrorCode ierr; 228 229 PetscFunctionBegin; 230 ierr = PetscObjectReference((PetscObject)G);CHKERRQ(ierr); 231 ierr = MatDestroy(&pcbddc->discretegradient);CHKERRQ(ierr); 232 pcbddc->discretegradient = G; 233 pcbddc->nedorder = order > 0 ? order : -order; 234 pcbddc->nedfield = field; 235 pcbddc->nedglobal = global; 236 pcbddc->conforming = conforming; 237 PetscFunctionReturn(0); 238 } 239 240 #undef __FUNCT__ 241 #define __FUNCT__ "PCBDDCSetDiscreteGradient" 242 /*@ 243 PCBDDCSetDiscreteGradient - Sets the discrete gradient 244 245 Collective on PC 246 247 Input Parameters: 248 + pc - the preconditioning context 249 . G - the discrete gradient matrix (should be in AIJ format) 250 . order - the order of the Nedelec space (1 for the lowest order) 251 . field - the field id of the Nedelec dofs (not used if the fields have not been specified) 252 . global - the type of global ordering for the rows of G 253 - conforming - whether the mesh is conforming or not 254 255 Level: advanced 256 257 Notes: The discrete gradient matrix G is used to analyze the subdomain edges, and it should not contain any zero entry. 258 For variable order spaces, the order should be set to zero. 259 If global is true, the rows of G should be given in global ordering for the whole dofs; 260 if false, the ordering should be global for the Nedelec field. 261 In the latter case, it should hold gid[i] < gid[j] iff geid[i] < geid[j], with gid the global orderding for all the dofs 262 and geid the one for the Nedelec field. 263 264 .seealso: PCBDDC,PCBDDCSetDofsSplitting(),PCBDDCSetDofsSplittingLocal() 265 @*/ 266 PetscErrorCode PCBDDCSetDiscreteGradient(PC pc, Mat G, PetscInt order, PetscInt field, PetscBool global, PetscBool conforming) 267 { 268 PetscErrorCode ierr; 269 270 PetscFunctionBegin; 271 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 272 PetscValidHeaderSpecific(G,MAT_CLASSID,2); 273 PetscValidLogicalCollectiveInt(pc,order,3); 274 PetscValidLogicalCollectiveInt(pc,field,4); 275 PetscValidLogicalCollectiveBool(pc,global,5); 276 PetscValidLogicalCollectiveBool(pc,conforming,6); 277 PetscCheckSameComm(pc,1,G,2); 278 ierr = PetscTryMethod(pc,"PCBDDCSetDiscreteGradient_C",(PC,Mat,PetscInt,PetscInt,PetscBool,PetscBool),(pc,G,order,field,global,conforming));CHKERRQ(ierr); 279 PetscFunctionReturn(0); 280 } 281 282 #undef __FUNCT__ 283 #define __FUNCT__ "PCBDDCSetDivergenceMat_BDDC" 284 static PetscErrorCode PCBDDCSetDivergenceMat_BDDC(PC pc, Mat divudotp, PetscBool trans, IS vl2l) 285 { 286 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 287 PetscErrorCode ierr; 288 289 PetscFunctionBegin; 290 ierr = PetscObjectReference((PetscObject)divudotp);CHKERRQ(ierr); 291 ierr = MatDestroy(&pcbddc->divudotp);CHKERRQ(ierr); 292 pcbddc->divudotp = divudotp; 293 pcbddc->divudotp_trans = trans; 294 pcbddc->compute_nonetflux = PETSC_TRUE; 295 if (vl2l) { 296 ierr = PetscObjectReference((PetscObject)vl2l);CHKERRQ(ierr); 297 ierr = ISDestroy(&pcbddc->divudotp_vl2l);CHKERRQ(ierr); 298 pcbddc->divudotp_vl2l = vl2l; 299 } 300 PetscFunctionReturn(0); 301 } 302 303 #undef __FUNCT__ 304 #define __FUNCT__ "PCBDDCSetDivergenceMat" 305 /*@ 306 PCBDDCSetDivergenceMat - Sets the linear operator representing \int_\Omega \div {\bf u} \cdot p dx 307 308 Collective on PC 309 310 Input Parameters: 311 + pc - the preconditioning context 312 . divudotp - the matrix (must be of type MATIS) 313 . trans - if trans if false (resp. true), then pressures are in the test (trial) space and velocities are in the trial (test) space. 314 - 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 315 316 Level: advanced 317 318 Notes: This auxiliary matrix is used to compute quadrature weights representing the net-flux across subdomain boundaries 319 320 .seealso: PCBDDC 321 @*/ 322 PetscErrorCode PCBDDCSetDivergenceMat(PC pc, Mat divudotp, PetscBool trans, IS vl2l) 323 { 324 PetscBool ismatis; 325 PetscErrorCode ierr; 326 327 PetscFunctionBegin; 328 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 329 PetscValidHeaderSpecific(divudotp,MAT_CLASSID,2); 330 PetscCheckSameComm(pc,1,divudotp,2); 331 PetscValidLogicalCollectiveBool(pc,trans,3); 332 if (vl2l) PetscValidHeaderSpecific(divudotp,IS_CLASSID,4); 333 ierr = PetscObjectTypeCompare((PetscObject)divudotp,MATIS,&ismatis);CHKERRQ(ierr); 334 if (!ismatis) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONG,"Divergence matrix needs to be of type MATIS"); 335 ierr = PetscTryMethod(pc,"PCBDDCSetDivergenceMat_C",(PC,Mat,PetscBool,IS),(pc,divudotp,trans,vl2l));CHKERRQ(ierr); 336 PetscFunctionReturn(0); 337 } 338 339 #undef __FUNCT__ 340 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat_BDDC" 341 static PetscErrorCode PCBDDCSetChangeOfBasisMat_BDDC(PC pc, Mat change, PetscBool interior) 342 { 343 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 344 PetscErrorCode ierr; 345 346 PetscFunctionBegin; 347 ierr = PetscObjectReference((PetscObject)change);CHKERRQ(ierr); 348 ierr = MatDestroy(&pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 349 pcbddc->user_ChangeOfBasisMatrix = change; 350 pcbddc->change_interior = interior; 351 PetscFunctionReturn(0); 352 } 353 #undef __FUNCT__ 354 #define __FUNCT__ "PCBDDCSetChangeOfBasisMat" 355 /*@ 356 PCBDDCSetChangeOfBasisMat - Set user defined change of basis for dofs 357 358 Collective on PC 359 360 Input Parameters: 361 + pc - the preconditioning context 362 . change - the change of basis matrix 363 - interior - whether or not the change of basis modifies interior dofs 364 365 Level: intermediate 366 367 Notes: 368 369 .seealso: PCBDDC 370 @*/ 371 PetscErrorCode PCBDDCSetChangeOfBasisMat(PC pc, Mat change, PetscBool interior) 372 { 373 PetscErrorCode ierr; 374 375 PetscFunctionBegin; 376 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 377 PetscValidHeaderSpecific(change,MAT_CLASSID,2); 378 PetscCheckSameComm(pc,1,change,2); 379 if (pc->mat) { 380 PetscInt rows_c,cols_c,rows,cols; 381 ierr = MatGetSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 382 ierr = MatGetSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 383 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); 384 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); 385 ierr = MatGetLocalSize(pc->mat,&rows,&cols);CHKERRQ(ierr); 386 ierr = MatGetLocalSize(change,&rows_c,&cols_c);CHKERRQ(ierr); 387 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); 388 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); 389 } 390 ierr = PetscTryMethod(pc,"PCBDDCSetChangeOfBasisMat_C",(PC,Mat,PetscBool),(pc,change,interior));CHKERRQ(ierr); 391 PetscFunctionReturn(0); 392 } 393 394 #undef __FUNCT__ 395 #define __FUNCT__ "PCBDDCSetPrimalVerticesIS_BDDC" 396 static PetscErrorCode PCBDDCSetPrimalVerticesIS_BDDC(PC pc, IS PrimalVertices) 397 { 398 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 399 PetscBool isequal = PETSC_FALSE; 400 PetscErrorCode ierr; 401 402 PetscFunctionBegin; 403 ierr = PetscObjectReference((PetscObject)PrimalVertices);CHKERRQ(ierr); 404 if (pcbddc->user_primal_vertices) { 405 ierr = ISEqual(PrimalVertices,pcbddc->user_primal_vertices,&isequal);CHKERRQ(ierr); 406 } 407 ierr = ISDestroy(&pcbddc->user_primal_vertices);CHKERRQ(ierr); 408 ierr = ISDestroy(&pcbddc->user_primal_vertices_local);CHKERRQ(ierr); 409 pcbddc->user_primal_vertices = PrimalVertices; 410 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 411 PetscFunctionReturn(0); 412 } 413 #undef __FUNCT__ 414 #define __FUNCT__ "PCBDDCSetPrimalVerticesIS" 415 /*@ 416 PCBDDCSetPrimalVerticesIS - Set additional user defined primal vertices in PCBDDC 417 418 Collective 419 420 Input Parameters: 421 + pc - the preconditioning context 422 - PrimalVertices - index set of primal vertices in global numbering (can be empty) 423 424 Level: intermediate 425 426 Notes: 427 Any process can list any global node 428 429 .seealso: PCBDDC 430 @*/ 431 PetscErrorCode PCBDDCSetPrimalVerticesIS(PC pc, IS PrimalVertices) 432 { 433 PetscErrorCode ierr; 434 435 PetscFunctionBegin; 436 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 437 PetscValidHeaderSpecific(PrimalVertices,IS_CLASSID,2); 438 PetscCheckSameComm(pc,1,PrimalVertices,2); 439 ierr = PetscTryMethod(pc,"PCBDDCSetPrimalVerticesIS_C",(PC,IS),(pc,PrimalVertices));CHKERRQ(ierr); 440 PetscFunctionReturn(0); 441 } 442 443 #undef __FUNCT__ 444 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS_BDDC" 445 static PetscErrorCode PCBDDCSetPrimalVerticesLocalIS_BDDC(PC pc, IS PrimalVertices) 446 { 447 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 448 PetscBool isequal = PETSC_FALSE; 449 PetscErrorCode ierr; 450 451 PetscFunctionBegin; 452 ierr = PetscObjectReference((PetscObject)PrimalVertices);CHKERRQ(ierr); 453 if (pcbddc->user_primal_vertices_local) { 454 ierr = ISEqual(PrimalVertices,pcbddc->user_primal_vertices_local,&isequal);CHKERRQ(ierr); 455 } 456 ierr = ISDestroy(&pcbddc->user_primal_vertices);CHKERRQ(ierr); 457 ierr = ISDestroy(&pcbddc->user_primal_vertices_local);CHKERRQ(ierr); 458 pcbddc->user_primal_vertices_local = PrimalVertices; 459 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 460 PetscFunctionReturn(0); 461 } 462 #undef __FUNCT__ 463 #define __FUNCT__ "PCBDDCSetPrimalVerticesLocalIS" 464 /*@ 465 PCBDDCSetPrimalVerticesLocalIS - Set additional user defined primal vertices in PCBDDC 466 467 Collective 468 469 Input Parameters: 470 + pc - the preconditioning context 471 - PrimalVertices - index set of primal vertices in local numbering (can be empty) 472 473 Level: intermediate 474 475 Notes: 476 477 .seealso: PCBDDC 478 @*/ 479 PetscErrorCode PCBDDCSetPrimalVerticesLocalIS(PC pc, IS PrimalVertices) 480 { 481 PetscErrorCode ierr; 482 483 PetscFunctionBegin; 484 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 485 PetscValidHeaderSpecific(PrimalVertices,IS_CLASSID,2); 486 PetscCheckSameComm(pc,1,PrimalVertices,2); 487 ierr = PetscTryMethod(pc,"PCBDDCSetPrimalVerticesLocalIS_C",(PC,IS),(pc,PrimalVertices));CHKERRQ(ierr); 488 PetscFunctionReturn(0); 489 } 490 491 #undef __FUNCT__ 492 #define __FUNCT__ "PCBDDCSetCoarseningRatio_BDDC" 493 static PetscErrorCode PCBDDCSetCoarseningRatio_BDDC(PC pc,PetscInt k) 494 { 495 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 496 497 PetscFunctionBegin; 498 pcbddc->coarsening_ratio = k; 499 PetscFunctionReturn(0); 500 } 501 502 #undef __FUNCT__ 503 #define __FUNCT__ "PCBDDCSetCoarseningRatio" 504 /*@ 505 PCBDDCSetCoarseningRatio - Set coarsening ratio used in multilevel 506 507 Logically collective on PC 508 509 Input Parameters: 510 + pc - the preconditioning context 511 - k - coarsening ratio (H/h at the coarser level) 512 513 Options Database Keys: 514 . -pc_bddc_coarsening_ratio 515 516 Level: intermediate 517 518 Notes: 519 Approximatively k subdomains at the finer level will be aggregated into a single subdomain at the coarser level 520 521 .seealso: PCBDDC, PCBDDCSetLevels() 522 @*/ 523 PetscErrorCode PCBDDCSetCoarseningRatio(PC pc,PetscInt k) 524 { 525 PetscErrorCode ierr; 526 527 PetscFunctionBegin; 528 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 529 PetscValidLogicalCollectiveInt(pc,k,2); 530 ierr = PetscTryMethod(pc,"PCBDDCSetCoarseningRatio_C",(PC,PetscInt),(pc,k));CHKERRQ(ierr); 531 PetscFunctionReturn(0); 532 } 533 534 /* The following functions (PCBDDCSetUseExactDirichlet PCBDDCSetLevel) are not public */ 535 #undef __FUNCT__ 536 #define __FUNCT__ "PCBDDCSetUseExactDirichlet_BDDC" 537 static PetscErrorCode PCBDDCSetUseExactDirichlet_BDDC(PC pc,PetscBool flg) 538 { 539 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 540 541 PetscFunctionBegin; 542 pcbddc->use_exact_dirichlet_trick = flg; 543 PetscFunctionReturn(0); 544 } 545 546 #undef __FUNCT__ 547 #define __FUNCT__ "PCBDDCSetUseExactDirichlet" 548 PetscErrorCode PCBDDCSetUseExactDirichlet(PC pc,PetscBool flg) 549 { 550 PetscErrorCode ierr; 551 552 PetscFunctionBegin; 553 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 554 PetscValidLogicalCollectiveBool(pc,flg,2); 555 ierr = PetscTryMethod(pc,"PCBDDCSetUseExactDirichlet_C",(PC,PetscBool),(pc,flg));CHKERRQ(ierr); 556 PetscFunctionReturn(0); 557 } 558 559 #undef __FUNCT__ 560 #define __FUNCT__ "PCBDDCSetLevel_BDDC" 561 static PetscErrorCode PCBDDCSetLevel_BDDC(PC pc,PetscInt level) 562 { 563 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 564 565 PetscFunctionBegin; 566 pcbddc->current_level = level; 567 PetscFunctionReturn(0); 568 } 569 570 #undef __FUNCT__ 571 #define __FUNCT__ "PCBDDCSetLevel" 572 PetscErrorCode PCBDDCSetLevel(PC pc,PetscInt level) 573 { 574 PetscErrorCode ierr; 575 576 PetscFunctionBegin; 577 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 578 PetscValidLogicalCollectiveInt(pc,level,2); 579 ierr = PetscTryMethod(pc,"PCBDDCSetLevel_C",(PC,PetscInt),(pc,level));CHKERRQ(ierr); 580 PetscFunctionReturn(0); 581 } 582 583 #undef __FUNCT__ 584 #define __FUNCT__ "PCBDDCSetLevels_BDDC" 585 static PetscErrorCode PCBDDCSetLevels_BDDC(PC pc,PetscInt levels) 586 { 587 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 588 589 PetscFunctionBegin; 590 pcbddc->max_levels = levels; 591 PetscFunctionReturn(0); 592 } 593 594 #undef __FUNCT__ 595 #define __FUNCT__ "PCBDDCSetLevels" 596 /*@ 597 PCBDDCSetLevels - Sets the maximum number of levels for multilevel 598 599 Logically collective on PC 600 601 Input Parameters: 602 + pc - the preconditioning context 603 - levels - the maximum number of levels (max 9) 604 605 Options Database Keys: 606 . -pc_bddc_levels 607 608 Level: intermediate 609 610 Notes: 611 Default value is 0, i.e. traditional one-level BDDC 612 613 .seealso: PCBDDC, PCBDDCSetCoarseningRatio() 614 @*/ 615 PetscErrorCode PCBDDCSetLevels(PC pc,PetscInt levels) 616 { 617 PetscErrorCode ierr; 618 619 PetscFunctionBegin; 620 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 621 PetscValidLogicalCollectiveInt(pc,levels,2); 622 if (levels > 99) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Maximum number of levels for bddc is 99\n"); 623 ierr = PetscTryMethod(pc,"PCBDDCSetLevels_C",(PC,PetscInt),(pc,levels));CHKERRQ(ierr); 624 PetscFunctionReturn(0); 625 } 626 627 #undef __FUNCT__ 628 #define __FUNCT__ "PCBDDCSetDirichletBoundaries_BDDC" 629 static PetscErrorCode PCBDDCSetDirichletBoundaries_BDDC(PC pc,IS DirichletBoundaries) 630 { 631 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 632 PetscBool isequal = PETSC_FALSE; 633 PetscErrorCode ierr; 634 635 PetscFunctionBegin; 636 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 637 if (pcbddc->DirichletBoundaries) { 638 ierr = ISEqual(DirichletBoundaries,pcbddc->DirichletBoundaries,&isequal);CHKERRQ(ierr); 639 } 640 /* last user setting takes precendence -> destroy any other customization */ 641 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 642 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 643 pcbddc->DirichletBoundaries = DirichletBoundaries; 644 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 645 PetscFunctionReturn(0); 646 } 647 648 #undef __FUNCT__ 649 #define __FUNCT__ "PCBDDCSetDirichletBoundaries" 650 /*@ 651 PCBDDCSetDirichletBoundaries - Set IS defining Dirichlet boundaries for the global problem. 652 653 Collective 654 655 Input Parameters: 656 + pc - the preconditioning context 657 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries 658 659 Level: intermediate 660 661 Notes: 662 Provide the information if you used MatZeroRows/Columns routines. Any process can list any global node 663 664 .seealso: PCBDDC, PCBDDCSetDirichletBoundariesLocal(), MatZeroRows(), MatZeroRowsColumns() 665 @*/ 666 PetscErrorCode PCBDDCSetDirichletBoundaries(PC pc,IS DirichletBoundaries) 667 { 668 PetscErrorCode ierr; 669 670 PetscFunctionBegin; 671 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 672 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 673 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 674 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundaries_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 675 PetscFunctionReturn(0); 676 } 677 678 #undef __FUNCT__ 679 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal_BDDC" 680 static PetscErrorCode PCBDDCSetDirichletBoundariesLocal_BDDC(PC pc,IS DirichletBoundaries) 681 { 682 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 683 PetscBool isequal = PETSC_FALSE; 684 PetscErrorCode ierr; 685 686 PetscFunctionBegin; 687 ierr = PetscObjectReference((PetscObject)DirichletBoundaries);CHKERRQ(ierr); 688 if (pcbddc->DirichletBoundariesLocal) { 689 ierr = ISEqual(DirichletBoundaries,pcbddc->DirichletBoundariesLocal,&isequal);CHKERRQ(ierr); 690 } 691 /* last user setting takes precendence -> destroy any other customization */ 692 ierr = ISDestroy(&pcbddc->DirichletBoundariesLocal);CHKERRQ(ierr); 693 ierr = ISDestroy(&pcbddc->DirichletBoundaries);CHKERRQ(ierr); 694 pcbddc->DirichletBoundariesLocal = DirichletBoundaries; 695 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 696 PetscFunctionReturn(0); 697 } 698 699 #undef __FUNCT__ 700 #define __FUNCT__ "PCBDDCSetDirichletBoundariesLocal" 701 /*@ 702 PCBDDCSetDirichletBoundariesLocal - Set IS defining Dirichlet boundaries for the global problem in local ordering. 703 704 Collective 705 706 Input Parameters: 707 + pc - the preconditioning context 708 - DirichletBoundaries - parallel IS defining the Dirichlet boundaries (in local ordering) 709 710 Level: intermediate 711 712 Notes: 713 714 .seealso: PCBDDC, PCBDDCSetDirichletBoundaries(), MatZeroRows(), MatZeroRowsColumns() 715 @*/ 716 PetscErrorCode PCBDDCSetDirichletBoundariesLocal(PC pc,IS DirichletBoundaries) 717 { 718 PetscErrorCode ierr; 719 720 PetscFunctionBegin; 721 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 722 PetscValidHeaderSpecific(DirichletBoundaries,IS_CLASSID,2); 723 PetscCheckSameComm(pc,1,DirichletBoundaries,2); 724 ierr = PetscTryMethod(pc,"PCBDDCSetDirichletBoundariesLocal_C",(PC,IS),(pc,DirichletBoundaries));CHKERRQ(ierr); 725 PetscFunctionReturn(0); 726 } 727 728 #undef __FUNCT__ 729 #define __FUNCT__ "PCBDDCSetNeumannBoundaries_BDDC" 730 static PetscErrorCode PCBDDCSetNeumannBoundaries_BDDC(PC pc,IS NeumannBoundaries) 731 { 732 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 733 PetscBool isequal = PETSC_FALSE; 734 PetscErrorCode ierr; 735 736 PetscFunctionBegin; 737 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 738 if (pcbddc->NeumannBoundaries) { 739 ierr = ISEqual(NeumannBoundaries,pcbddc->NeumannBoundaries,&isequal);CHKERRQ(ierr); 740 } 741 /* last user setting takes precendence -> destroy any other customization */ 742 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 743 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 744 pcbddc->NeumannBoundaries = NeumannBoundaries; 745 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 746 PetscFunctionReturn(0); 747 } 748 749 #undef __FUNCT__ 750 #define __FUNCT__ "PCBDDCSetNeumannBoundaries" 751 /*@ 752 PCBDDCSetNeumannBoundaries - Set IS defining Neumann boundaries for the global problem. 753 754 Collective 755 756 Input Parameters: 757 + pc - the preconditioning context 758 - NeumannBoundaries - parallel IS defining the Neumann boundaries 759 760 Level: intermediate 761 762 Notes: 763 Any process can list any global node 764 765 .seealso: PCBDDC, PCBDDCSetNeumannBoundariesLocal() 766 @*/ 767 PetscErrorCode PCBDDCSetNeumannBoundaries(PC pc,IS NeumannBoundaries) 768 { 769 PetscErrorCode ierr; 770 771 PetscFunctionBegin; 772 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 773 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 774 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 775 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundaries_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 776 PetscFunctionReturn(0); 777 } 778 779 #undef __FUNCT__ 780 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal_BDDC" 781 static PetscErrorCode PCBDDCSetNeumannBoundariesLocal_BDDC(PC pc,IS NeumannBoundaries) 782 { 783 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 784 PetscBool isequal = PETSC_FALSE; 785 PetscErrorCode ierr; 786 787 PetscFunctionBegin; 788 ierr = PetscObjectReference((PetscObject)NeumannBoundaries);CHKERRQ(ierr); 789 if (pcbddc->NeumannBoundariesLocal) { 790 ierr = ISEqual(NeumannBoundaries,pcbddc->NeumannBoundariesLocal,&isequal);CHKERRQ(ierr); 791 } 792 /* last user setting takes precendence -> destroy any other customization */ 793 ierr = ISDestroy(&pcbddc->NeumannBoundariesLocal);CHKERRQ(ierr); 794 ierr = ISDestroy(&pcbddc->NeumannBoundaries);CHKERRQ(ierr); 795 pcbddc->NeumannBoundariesLocal = NeumannBoundaries; 796 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 797 PetscFunctionReturn(0); 798 } 799 800 #undef __FUNCT__ 801 #define __FUNCT__ "PCBDDCSetNeumannBoundariesLocal" 802 /*@ 803 PCBDDCSetNeumannBoundariesLocal - Set IS defining Neumann boundaries for the global problem in local ordering. 804 805 Collective 806 807 Input Parameters: 808 + pc - the preconditioning context 809 - NeumannBoundaries - parallel IS defining the subdomain part of Neumann boundaries (in local ordering) 810 811 Level: intermediate 812 813 Notes: 814 815 .seealso: PCBDDC, PCBDDCSetNeumannBoundaries() 816 @*/ 817 PetscErrorCode PCBDDCSetNeumannBoundariesLocal(PC pc,IS NeumannBoundaries) 818 { 819 PetscErrorCode ierr; 820 821 PetscFunctionBegin; 822 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 823 PetscValidHeaderSpecific(NeumannBoundaries,IS_CLASSID,2); 824 PetscCheckSameComm(pc,1,NeumannBoundaries,2); 825 ierr = PetscTryMethod(pc,"PCBDDCSetNeumannBoundariesLocal_C",(PC,IS),(pc,NeumannBoundaries));CHKERRQ(ierr); 826 PetscFunctionReturn(0); 827 } 828 829 #undef __FUNCT__ 830 #define __FUNCT__ "PCBDDCGetDirichletBoundaries_BDDC" 831 static PetscErrorCode PCBDDCGetDirichletBoundaries_BDDC(PC pc,IS *DirichletBoundaries) 832 { 833 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 834 835 PetscFunctionBegin; 836 *DirichletBoundaries = pcbddc->DirichletBoundaries; 837 PetscFunctionReturn(0); 838 } 839 840 #undef __FUNCT__ 841 #define __FUNCT__ "PCBDDCGetDirichletBoundaries" 842 /*@ 843 PCBDDCGetDirichletBoundaries - Get parallel IS for Dirichlet boundaries 844 845 Collective 846 847 Input Parameters: 848 . pc - the preconditioning context 849 850 Output Parameters: 851 . DirichletBoundaries - index set defining the Dirichlet boundaries 852 853 Level: intermediate 854 855 Notes: 856 The IS returned (if any) is the same passed in earlier by the user with PCBDDCSetDirichletBoundaries 857 858 .seealso: PCBDDC 859 @*/ 860 PetscErrorCode PCBDDCGetDirichletBoundaries(PC pc,IS *DirichletBoundaries) 861 { 862 PetscErrorCode ierr; 863 864 PetscFunctionBegin; 865 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 866 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundaries_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 867 PetscFunctionReturn(0); 868 } 869 870 #undef __FUNCT__ 871 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal_BDDC" 872 static PetscErrorCode PCBDDCGetDirichletBoundariesLocal_BDDC(PC pc,IS *DirichletBoundaries) 873 { 874 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 875 876 PetscFunctionBegin; 877 *DirichletBoundaries = pcbddc->DirichletBoundariesLocal; 878 PetscFunctionReturn(0); 879 } 880 881 #undef __FUNCT__ 882 #define __FUNCT__ "PCBDDCGetDirichletBoundariesLocal" 883 /*@ 884 PCBDDCGetDirichletBoundariesLocal - Get parallel IS for Dirichlet boundaries (in local ordering) 885 886 Collective 887 888 Input Parameters: 889 . pc - the preconditioning context 890 891 Output Parameters: 892 . DirichletBoundaries - index set defining the subdomain part of Dirichlet boundaries 893 894 Level: intermediate 895 896 Notes: 897 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). 898 In the latter case, the IS will be available after PCSetUp. 899 900 .seealso: PCBDDC 901 @*/ 902 PetscErrorCode PCBDDCGetDirichletBoundariesLocal(PC pc,IS *DirichletBoundaries) 903 { 904 PetscErrorCode ierr; 905 906 PetscFunctionBegin; 907 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 908 ierr = PetscUseMethod(pc,"PCBDDCGetDirichletBoundariesLocal_C",(PC,IS*),(pc,DirichletBoundaries));CHKERRQ(ierr); 909 PetscFunctionReturn(0); 910 } 911 912 #undef __FUNCT__ 913 #define __FUNCT__ "PCBDDCGetNeumannBoundaries_BDDC" 914 static PetscErrorCode PCBDDCGetNeumannBoundaries_BDDC(PC pc,IS *NeumannBoundaries) 915 { 916 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 917 918 PetscFunctionBegin; 919 *NeumannBoundaries = pcbddc->NeumannBoundaries; 920 PetscFunctionReturn(0); 921 } 922 923 #undef __FUNCT__ 924 #define __FUNCT__ "PCBDDCGetNeumannBoundaries" 925 /*@ 926 PCBDDCGetNeumannBoundaries - Get parallel IS for Neumann boundaries 927 928 Collective 929 930 Input Parameters: 931 . pc - the preconditioning context 932 933 Output Parameters: 934 . NeumannBoundaries - index set defining the Neumann boundaries 935 936 Level: intermediate 937 938 Notes: 939 The IS returned (if any) is the same passed in earlier by the user with PCBDDCSetNeumannBoundaries 940 941 .seealso: PCBDDC 942 @*/ 943 PetscErrorCode PCBDDCGetNeumannBoundaries(PC pc,IS *NeumannBoundaries) 944 { 945 PetscErrorCode ierr; 946 947 PetscFunctionBegin; 948 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 949 ierr = PetscUseMethod(pc,"PCBDDCGetNeumannBoundaries_C",(PC,IS*),(pc,NeumannBoundaries));CHKERRQ(ierr); 950 PetscFunctionReturn(0); 951 } 952 953 #undef __FUNCT__ 954 #define __FUNCT__ "PCBDDCGetNeumannBoundariesLocal_BDDC" 955 static PetscErrorCode PCBDDCGetNeumannBoundariesLocal_BDDC(PC pc,IS *NeumannBoundaries) 956 { 957 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 958 959 PetscFunctionBegin; 960 *NeumannBoundaries = pcbddc->NeumannBoundariesLocal; 961 PetscFunctionReturn(0); 962 } 963 964 #undef __FUNCT__ 965 #define __FUNCT__ "PCBDDCGetNeumannBoundariesLocal" 966 /*@ 967 PCBDDCGetNeumannBoundariesLocal - Get parallel IS for Neumann boundaries (in local ordering) 968 969 Collective 970 971 Input Parameters: 972 . pc - the preconditioning context 973 974 Output Parameters: 975 . NeumannBoundaries - index set defining the subdomain part of Neumann boundaries 976 977 Level: intermediate 978 979 Notes: 980 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). 981 In the latter case, the IS will be available after PCSetUp. 982 983 .seealso: PCBDDC 984 @*/ 985 PetscErrorCode PCBDDCGetNeumannBoundariesLocal(PC pc,IS *NeumannBoundaries) 986 { 987 PetscErrorCode ierr; 988 989 PetscFunctionBegin; 990 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 991 ierr = PetscUseMethod(pc,"PCBDDCGetNeumannBoundariesLocal_C",(PC,IS*),(pc,NeumannBoundaries));CHKERRQ(ierr); 992 PetscFunctionReturn(0); 993 } 994 995 #undef __FUNCT__ 996 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph_BDDC" 997 static PetscErrorCode PCBDDCSetLocalAdjacencyGraph_BDDC(PC pc, PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 998 { 999 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1000 PCBDDCGraph mat_graph = pcbddc->mat_graph; 1001 PetscBool same_data = PETSC_FALSE; 1002 PetscErrorCode ierr; 1003 1004 PetscFunctionBegin; 1005 if (!nvtxs) { 1006 if (copymode == PETSC_OWN_POINTER) { 1007 ierr = PetscFree(xadj);CHKERRQ(ierr); 1008 ierr = PetscFree(adjncy);CHKERRQ(ierr); 1009 } 1010 ierr = PCBDDCGraphResetCSR(mat_graph);CHKERRQ(ierr); 1011 PetscFunctionReturn(0); 1012 } 1013 if (mat_graph->nvtxs == nvtxs && mat_graph->freecsr) { /* we own the data */ 1014 if (mat_graph->xadj == xadj && mat_graph->adjncy == adjncy) same_data = PETSC_TRUE; 1015 if (!same_data && mat_graph->xadj[nvtxs] == xadj[nvtxs]) { 1016 ierr = PetscMemcmp(xadj,mat_graph->xadj,(nvtxs+1)*sizeof(PetscInt),&same_data);CHKERRQ(ierr); 1017 if (same_data) { 1018 ierr = PetscMemcmp(adjncy,mat_graph->adjncy,xadj[nvtxs]*sizeof(PetscInt),&same_data);CHKERRQ(ierr); 1019 } 1020 } 1021 } 1022 if (!same_data) { 1023 /* free old CSR */ 1024 ierr = PCBDDCGraphResetCSR(mat_graph);CHKERRQ(ierr); 1025 /* get CSR into graph structure */ 1026 if (copymode == PETSC_COPY_VALUES) { 1027 ierr = PetscMalloc1(nvtxs+1,&mat_graph->xadj);CHKERRQ(ierr); 1028 ierr = PetscMalloc1(xadj[nvtxs],&mat_graph->adjncy);CHKERRQ(ierr); 1029 ierr = PetscMemcpy(mat_graph->xadj,xadj,(nvtxs+1)*sizeof(PetscInt));CHKERRQ(ierr); 1030 ierr = PetscMemcpy(mat_graph->adjncy,adjncy,xadj[nvtxs]*sizeof(PetscInt));CHKERRQ(ierr); 1031 mat_graph->freecsr = PETSC_TRUE; 1032 } else if (copymode == PETSC_OWN_POINTER) { 1033 mat_graph->xadj = (PetscInt*)xadj; 1034 mat_graph->adjncy = (PetscInt*)adjncy; 1035 mat_graph->freecsr = PETSC_TRUE; 1036 } else if (copymode == PETSC_USE_POINTER) { 1037 mat_graph->xadj = (PetscInt*)xadj; 1038 mat_graph->adjncy = (PetscInt*)adjncy; 1039 mat_graph->freecsr = PETSC_FALSE; 1040 } else SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unsupported copy mode %d",copymode); 1041 mat_graph->nvtxs_csr = nvtxs; 1042 pcbddc->recompute_topography = PETSC_TRUE; 1043 } 1044 PetscFunctionReturn(0); 1045 } 1046 1047 #undef __FUNCT__ 1048 #define __FUNCT__ "PCBDDCSetLocalAdjacencyGraph" 1049 /*@ 1050 PCBDDCSetLocalAdjacencyGraph - Set adjacency structure (CSR graph) of the local degrees of freedom. 1051 1052 Not collective 1053 1054 Input Parameters: 1055 + pc - the preconditioning context. 1056 . nvtxs - number of local vertices of the graph (i.e., the number of local dofs). 1057 . xadj, adjncy - the connectivity of the dofs in CSR format. 1058 - copymode - supported modes are PETSC_COPY_VALUES, PETSC_USE_POINTER or PETSC_OWN_POINTER. 1059 1060 Level: intermediate 1061 1062 Notes: A dof is considered connected with all local dofs if xadj[dof+1]-xadj[dof] == 1 and adjncy[xadj[dof]] is negative. 1063 1064 .seealso: PCBDDC,PetscCopyMode 1065 @*/ 1066 PetscErrorCode PCBDDCSetLocalAdjacencyGraph(PC pc,PetscInt nvtxs,const PetscInt xadj[],const PetscInt adjncy[], PetscCopyMode copymode) 1067 { 1068 void (*f)(void) = 0; 1069 PetscErrorCode ierr; 1070 1071 PetscFunctionBegin; 1072 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 1073 if (nvtxs) { 1074 PetscValidIntPointer(xadj,3); 1075 if (xadj[nvtxs]) PetscValidIntPointer(adjncy,4); 1076 } 1077 ierr = PetscTryMethod(pc,"PCBDDCSetLocalAdjacencyGraph_C",(PC,PetscInt,const PetscInt[],const PetscInt[],PetscCopyMode),(pc,nvtxs,xadj,adjncy,copymode));CHKERRQ(ierr); 1078 /* free arrays if PCBDDC is not the PC type */ 1079 ierr = PetscObjectQueryFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",&f);CHKERRQ(ierr); 1080 if (!f && copymode == PETSC_OWN_POINTER) { 1081 ierr = PetscFree(xadj);CHKERRQ(ierr); 1082 ierr = PetscFree(adjncy);CHKERRQ(ierr); 1083 } 1084 PetscFunctionReturn(0); 1085 } 1086 1087 #undef __FUNCT__ 1088 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal_BDDC" 1089 static PetscErrorCode PCBDDCSetDofsSplittingLocal_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 1090 { 1091 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1092 PetscInt i; 1093 PetscBool isequal = PETSC_FALSE; 1094 PetscErrorCode ierr; 1095 1096 PetscFunctionBegin; 1097 if (pcbddc->n_ISForDofsLocal == n_is) { 1098 for (i=0;i<n_is;i++) { 1099 PetscBool isequalt; 1100 ierr = ISEqual(ISForDofs[i],pcbddc->ISForDofsLocal[i],&isequalt);CHKERRQ(ierr); 1101 if (!isequalt) break; 1102 } 1103 if (i == n_is) isequal = PETSC_TRUE; 1104 } 1105 for (i=0;i<n_is;i++) { 1106 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 1107 } 1108 /* Destroy ISes if they were already set */ 1109 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 1110 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 1111 } 1112 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 1113 /* last user setting takes precendence -> destroy any other customization */ 1114 for (i=0;i<pcbddc->n_ISForDofs;i++) { 1115 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 1116 } 1117 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 1118 pcbddc->n_ISForDofs = 0; 1119 /* allocate space then set */ 1120 if (n_is) { 1121 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofsLocal);CHKERRQ(ierr); 1122 } 1123 for (i=0;i<n_is;i++) { 1124 pcbddc->ISForDofsLocal[i] = ISForDofs[i]; 1125 } 1126 pcbddc->n_ISForDofsLocal = n_is; 1127 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 1128 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 1129 PetscFunctionReturn(0); 1130 } 1131 1132 #undef __FUNCT__ 1133 #define __FUNCT__ "PCBDDCSetDofsSplittingLocal" 1134 /*@ 1135 PCBDDCSetDofsSplittingLocal - Set index sets defining fields of the local subdomain matrix 1136 1137 Collective 1138 1139 Input Parameters: 1140 + pc - the preconditioning context 1141 . n_is - number of index sets defining the fields 1142 - ISForDofs - array of IS describing the fields in local ordering 1143 1144 Level: intermediate 1145 1146 Notes: 1147 n_is should be the same among processes. Not all nodes need to be listed: unlisted nodes will belong to the complement field. 1148 1149 .seealso: PCBDDC 1150 @*/ 1151 PetscErrorCode PCBDDCSetDofsSplittingLocal(PC pc,PetscInt n_is, IS ISForDofs[]) 1152 { 1153 PetscInt i; 1154 PetscErrorCode ierr; 1155 1156 PetscFunctionBegin; 1157 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 1158 PetscValidLogicalCollectiveInt(pc,n_is,2); 1159 for (i=0;i<n_is;i++) { 1160 PetscCheckSameComm(pc,1,ISForDofs[i],3); 1161 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 1162 } 1163 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplittingLocal_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 1164 PetscFunctionReturn(0); 1165 } 1166 1167 #undef __FUNCT__ 1168 #define __FUNCT__ "PCBDDCSetDofsSplitting_BDDC" 1169 static PetscErrorCode PCBDDCSetDofsSplitting_BDDC(PC pc,PetscInt n_is, IS ISForDofs[]) 1170 { 1171 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1172 PetscInt i; 1173 PetscBool isequal = PETSC_FALSE; 1174 PetscErrorCode ierr; 1175 1176 PetscFunctionBegin; 1177 if (pcbddc->n_ISForDofs == n_is) { 1178 for (i=0;i<n_is;i++) { 1179 PetscBool isequalt; 1180 ierr = ISEqual(ISForDofs[i],pcbddc->ISForDofs[i],&isequalt);CHKERRQ(ierr); 1181 if (!isequalt) break; 1182 } 1183 if (i == n_is) isequal = PETSC_TRUE; 1184 } 1185 for (i=0;i<n_is;i++) { 1186 ierr = PetscObjectReference((PetscObject)ISForDofs[i]);CHKERRQ(ierr); 1187 } 1188 /* Destroy ISes if they were already set */ 1189 for (i=0;i<pcbddc->n_ISForDofs;i++) { 1190 ierr = ISDestroy(&pcbddc->ISForDofs[i]);CHKERRQ(ierr); 1191 } 1192 ierr = PetscFree(pcbddc->ISForDofs);CHKERRQ(ierr); 1193 /* last user setting takes precendence -> destroy any other customization */ 1194 for (i=0;i<pcbddc->n_ISForDofsLocal;i++) { 1195 ierr = ISDestroy(&pcbddc->ISForDofsLocal[i]);CHKERRQ(ierr); 1196 } 1197 ierr = PetscFree(pcbddc->ISForDofsLocal);CHKERRQ(ierr); 1198 pcbddc->n_ISForDofsLocal = 0; 1199 /* allocate space then set */ 1200 if (n_is) { 1201 ierr = PetscMalloc1(n_is,&pcbddc->ISForDofs);CHKERRQ(ierr); 1202 } 1203 for (i=0;i<n_is;i++) { 1204 pcbddc->ISForDofs[i] = ISForDofs[i]; 1205 } 1206 pcbddc->n_ISForDofs = n_is; 1207 if (n_is) pcbddc->user_provided_isfordofs = PETSC_TRUE; 1208 if (!isequal) pcbddc->recompute_topography = PETSC_TRUE; 1209 PetscFunctionReturn(0); 1210 } 1211 1212 #undef __FUNCT__ 1213 #define __FUNCT__ "PCBDDCSetDofsSplitting" 1214 /*@ 1215 PCBDDCSetDofsSplitting - Set index sets defining fields of the global matrix 1216 1217 Collective 1218 1219 Input Parameters: 1220 + pc - the preconditioning context 1221 . n_is - number of index sets defining the fields 1222 - ISForDofs - array of IS describing the fields in global ordering 1223 1224 Level: intermediate 1225 1226 Notes: 1227 Any process can list any global node. Not all nodes need to be listed: unlisted nodes will belong to the complement field. 1228 1229 .seealso: PCBDDC 1230 @*/ 1231 PetscErrorCode PCBDDCSetDofsSplitting(PC pc,PetscInt n_is, IS ISForDofs[]) 1232 { 1233 PetscInt i; 1234 PetscErrorCode ierr; 1235 1236 PetscFunctionBegin; 1237 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 1238 PetscValidLogicalCollectiveInt(pc,n_is,2); 1239 for (i=0;i<n_is;i++) { 1240 PetscCheckSameComm(pc,1,ISForDofs[i],3); 1241 PetscValidHeaderSpecific(ISForDofs[i],IS_CLASSID,3); 1242 } 1243 ierr = PetscTryMethod(pc,"PCBDDCSetDofsSplitting_C",(PC,PetscInt,IS[]),(pc,n_is,ISForDofs));CHKERRQ(ierr); 1244 PetscFunctionReturn(0); 1245 } 1246 1247 #undef __FUNCT__ 1248 #define __FUNCT__ "PCPreSolve_BDDC" 1249 /* 1250 PCPreSolve_BDDC - Changes the right hand side and (if necessary) the initial 1251 guess if a transformation of basis approach has been selected. 1252 1253 Input Parameter: 1254 + pc - the preconditioner contex 1255 1256 Application Interface Routine: PCPreSolve() 1257 1258 Notes: 1259 The interface routine PCPreSolve() is not usually called directly by 1260 the user, but instead is called by KSPSolve(). 1261 */ 1262 static PetscErrorCode PCPreSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 1263 { 1264 PetscErrorCode ierr; 1265 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1266 PC_IS *pcis = (PC_IS*)(pc->data); 1267 Vec used_vec; 1268 PetscBool save_rhs = PETSC_TRUE, benign_correction_computed; 1269 1270 PetscFunctionBegin; 1271 /* if we are working with CG, one dirichlet solve can be avoided during Krylov iterations */ 1272 if (ksp) { 1273 PetscBool iscg, isgroppcg, ispipecg, ispipecgrr; 1274 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPCG,&iscg);CHKERRQ(ierr); 1275 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPGROPPCG,&isgroppcg);CHKERRQ(ierr); 1276 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPPIPECG,&ispipecg);CHKERRQ(ierr); 1277 ierr = PetscObjectTypeCompare((PetscObject)ksp,KSPPIPECGRR,&ispipecgrr);CHKERRQ(ierr); 1278 if (pcbddc->benign_apply_coarse_only || pcbddc->switch_static || (!iscg && !isgroppcg && !ispipecg && !ispipecgrr)) { 1279 ierr = PCBDDCSetUseExactDirichlet(pc,PETSC_FALSE);CHKERRQ(ierr); 1280 } 1281 } 1282 if (pcbddc->benign_apply_coarse_only || pcbddc->switch_static) { 1283 ierr = PCBDDCSetUseExactDirichlet(pc,PETSC_FALSE);CHKERRQ(ierr); 1284 } 1285 1286 /* Creates parallel work vectors used in presolve */ 1287 if (!pcbddc->original_rhs) { 1288 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->original_rhs);CHKERRQ(ierr); 1289 } 1290 if (!pcbddc->temp_solution) { 1291 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->temp_solution);CHKERRQ(ierr); 1292 } 1293 1294 pcbddc->temp_solution_used = PETSC_FALSE; 1295 if (x) { 1296 ierr = PetscObjectReference((PetscObject)x);CHKERRQ(ierr); 1297 used_vec = x; 1298 } else { /* it can only happen when calling PCBDDCMatFETIDPGetRHS */ 1299 ierr = PetscObjectReference((PetscObject)pcbddc->temp_solution);CHKERRQ(ierr); 1300 used_vec = pcbddc->temp_solution; 1301 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 1302 pcbddc->temp_solution_used = PETSC_TRUE; 1303 ierr = VecCopy(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1304 save_rhs = PETSC_FALSE; 1305 pcbddc->eliminate_dirdofs = PETSC_TRUE; 1306 } 1307 1308 /* hack into ksp data structure since PCPreSolve comes earlier than setting to zero the guess in src/ksp/ksp/interface/itfunc.c */ 1309 if (ksp) { 1310 /* store the flag for the initial guess since it will be restored back during PCPostSolve_BDDC */ 1311 ierr = KSPGetInitialGuessNonzero(ksp,&pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 1312 if (!pcbddc->ksp_guess_nonzero) { 1313 ierr = VecSet(used_vec,0.0);CHKERRQ(ierr); 1314 } 1315 } 1316 1317 pcbddc->rhs_change = PETSC_FALSE; 1318 /* Take into account zeroed rows -> change rhs and store solution removed */ 1319 if (rhs && pcbddc->eliminate_dirdofs) { 1320 IS dirIS = NULL; 1321 1322 /* DirichletBoundariesLocal may not be consistent among neighbours; gets a dirichlet dofs IS from graph (may be cached) */ 1323 ierr = PCBDDCGraphGetDirichletDofs(pcbddc->mat_graph,&dirIS);CHKERRQ(ierr); 1324 if (dirIS) { 1325 Mat_IS *matis = (Mat_IS*)pc->pmat->data; 1326 PetscInt dirsize,i,*is_indices; 1327 PetscScalar *array_x; 1328 const PetscScalar *array_diagonal; 1329 1330 ierr = MatGetDiagonal(pc->pmat,pcis->vec1_global);CHKERRQ(ierr); 1331 ierr = VecPointwiseDivide(pcis->vec1_global,rhs,pcis->vec1_global);CHKERRQ(ierr); 1332 ierr = VecScatterBegin(matis->rctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1333 ierr = VecScatterEnd(matis->rctx,pcis->vec1_global,pcis->vec2_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1334 ierr = VecScatterBegin(matis->rctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1335 ierr = VecScatterEnd(matis->rctx,used_vec,pcis->vec1_N,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1336 ierr = ISGetLocalSize(dirIS,&dirsize);CHKERRQ(ierr); 1337 ierr = VecGetArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1338 ierr = VecGetArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1339 ierr = ISGetIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1340 for (i=0; i<dirsize; i++) array_x[is_indices[i]] = array_diagonal[is_indices[i]]; 1341 ierr = ISRestoreIndices(dirIS,(const PetscInt**)&is_indices);CHKERRQ(ierr); 1342 ierr = VecRestoreArrayRead(pcis->vec2_N,&array_diagonal);CHKERRQ(ierr); 1343 ierr = VecRestoreArray(pcis->vec1_N,&array_x);CHKERRQ(ierr); 1344 ierr = VecScatterBegin(matis->rctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1345 ierr = VecScatterEnd(matis->rctx,pcis->vec1_N,used_vec,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1346 pcbddc->rhs_change = PETSC_TRUE; 1347 ierr = ISDestroy(&dirIS);CHKERRQ(ierr); 1348 } 1349 } 1350 1351 /* remove the computed solution or the initial guess from the rhs */ 1352 if (pcbddc->rhs_change || (ksp && pcbddc->ksp_guess_nonzero) ) { 1353 /* save the original rhs */ 1354 if (save_rhs) { 1355 ierr = VecSwap(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1356 save_rhs = PETSC_FALSE; 1357 } 1358 pcbddc->rhs_change = PETSC_TRUE; 1359 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1360 ierr = MatMultAdd(pc->mat,used_vec,pcbddc->original_rhs,rhs);CHKERRQ(ierr); 1361 ierr = VecScale(used_vec,-1.0);CHKERRQ(ierr); 1362 ierr = VecCopy(used_vec,pcbddc->temp_solution);CHKERRQ(ierr); 1363 pcbddc->temp_solution_used = PETSC_TRUE; 1364 if (ksp) { 1365 ierr = KSPSetInitialGuessNonzero(ksp,PETSC_FALSE);CHKERRQ(ierr); 1366 } 1367 } 1368 ierr = VecDestroy(&used_vec);CHKERRQ(ierr); 1369 1370 /* compute initial vector in benign space if needed 1371 and remove non-benign solution from the rhs */ 1372 benign_correction_computed = PETSC_FALSE; 1373 if (rhs && pcbddc->benign_compute_correction && pcbddc->benign_have_null) { 1374 /* compute u^*_h using ideas similar to those in Xuemin Tu's PhD thesis (see Section 4.8.1) 1375 Recursively apply BDDC in the multilevel case */ 1376 if (!pcbddc->benign_vec) { 1377 ierr = VecDuplicate(rhs,&pcbddc->benign_vec);CHKERRQ(ierr); 1378 } 1379 pcbddc->benign_apply_coarse_only = PETSC_TRUE; 1380 if (!pcbddc->benign_skip_correction) { 1381 ierr = PCApply_BDDC(pc,rhs,pcbddc->benign_vec);CHKERRQ(ierr); 1382 benign_correction_computed = PETSC_TRUE; 1383 if (pcbddc->temp_solution_used) { 1384 ierr = VecAXPY(pcbddc->temp_solution,1.0,pcbddc->benign_vec);CHKERRQ(ierr); 1385 } 1386 ierr = VecScale(pcbddc->benign_vec,-1.0);CHKERRQ(ierr); 1387 /* store the original rhs if not done earlier */ 1388 if (save_rhs) { 1389 ierr = VecSwap(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1390 } 1391 if (pcbddc->rhs_change) { 1392 ierr = MatMultAdd(pc->mat,pcbddc->benign_vec,rhs,rhs);CHKERRQ(ierr); 1393 } else { 1394 ierr = MatMultAdd(pc->mat,pcbddc->benign_vec,pcbddc->original_rhs,rhs);CHKERRQ(ierr); 1395 } 1396 pcbddc->rhs_change = PETSC_TRUE; 1397 } 1398 pcbddc->benign_apply_coarse_only = PETSC_FALSE; 1399 } 1400 1401 /* dbg output */ 1402 if (pcbddc->dbg_flag && benign_correction_computed) { 1403 Vec v; 1404 ierr = VecDuplicate(pcis->vec1_global,&v);CHKERRQ(ierr); 1405 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,rhs,v);CHKERRQ(ierr); 1406 ierr = PCBDDCBenignGetOrSetP0(pc,v,PETSC_TRUE);CHKERRQ(ierr); 1407 ierr = PetscViewerASCIIPrintf(pcbddc->dbg_viewer,"LEVEL %d: is the correction benign?\n",pcbddc->current_level);CHKERRQ(ierr); 1408 ierr = PetscScalarView(pcbddc->benign_n,pcbddc->benign_p0,PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)pc)));CHKERRQ(ierr); 1409 ierr = VecDestroy(&v);CHKERRQ(ierr); 1410 } 1411 1412 /* set initial guess if using PCG */ 1413 pcbddc->exact_dirichlet_trick_app = PETSC_FALSE; 1414 if (x && pcbddc->use_exact_dirichlet_trick) { 1415 ierr = VecSet(x,0.0);CHKERRQ(ierr); 1416 if (pcbddc->ChangeOfBasisMatrix && pcbddc->change_interior) { 1417 if (benign_correction_computed) { /* we have already saved the changed rhs */ 1418 ierr = VecLockPop(pcis->vec1_global);CHKERRQ(ierr); 1419 } else { 1420 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,rhs,pcis->vec1_global);CHKERRQ(ierr); 1421 } 1422 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec1_global,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1423 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec1_global,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1424 } else { 1425 ierr = VecScatterBegin(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1426 ierr = VecScatterEnd(pcis->global_to_D,rhs,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1427 } 1428 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1429 if (pcbddc->ChangeOfBasisMatrix && pcbddc->change_interior) { 1430 ierr = VecSet(pcis->vec1_global,0.);CHKERRQ(ierr); 1431 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,pcis->vec1_global,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1432 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,pcis->vec1_global,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1433 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,pcis->vec1_global,x);CHKERRQ(ierr); 1434 } else { 1435 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1436 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,x,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1437 } 1438 if (ksp) { 1439 ierr = KSPSetInitialGuessNonzero(ksp,PETSC_TRUE);CHKERRQ(ierr); 1440 } 1441 pcbddc->exact_dirichlet_trick_app = PETSC_TRUE; 1442 } else if (pcbddc->ChangeOfBasisMatrix && pcbddc->change_interior && benign_correction_computed && pcbddc->use_exact_dirichlet_trick) { 1443 ierr = VecLockPop(pcis->vec1_global);CHKERRQ(ierr); 1444 } 1445 PetscFunctionReturn(0); 1446 } 1447 1448 #undef __FUNCT__ 1449 #define __FUNCT__ "PCPostSolve_BDDC" 1450 /* 1451 PCPostSolve_BDDC - Changes the computed solution if a transformation of basis 1452 approach has been selected. Also, restores rhs to its original state. 1453 1454 Input Parameter: 1455 + pc - the preconditioner contex 1456 1457 Application Interface Routine: PCPostSolve() 1458 1459 Notes: 1460 The interface routine PCPostSolve() is not usually called directly by 1461 the user, but instead is called by KSPSolve(). 1462 */ 1463 static PetscErrorCode PCPostSolve_BDDC(PC pc, KSP ksp, Vec rhs, Vec x) 1464 { 1465 PetscErrorCode ierr; 1466 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 1467 1468 PetscFunctionBegin; 1469 /* add solution removed in presolve */ 1470 if (x && pcbddc->rhs_change) { 1471 if (pcbddc->temp_solution_used) { 1472 ierr = VecAXPY(x,1.0,pcbddc->temp_solution);CHKERRQ(ierr); 1473 } else if (pcbddc->benign_compute_correction) { 1474 ierr = VecAXPY(x,-1.0,pcbddc->benign_vec);CHKERRQ(ierr); 1475 } 1476 } 1477 pcbddc->temp_solution_used = PETSC_FALSE; 1478 1479 /* restore rhs to its original state (not needed for FETI-DP) */ 1480 if (rhs && pcbddc->rhs_change) { 1481 ierr = VecSwap(rhs,pcbddc->original_rhs);CHKERRQ(ierr); 1482 } 1483 pcbddc->rhs_change = PETSC_FALSE; 1484 /* restore ksp guess state */ 1485 if (ksp) { 1486 ierr = KSPSetInitialGuessNonzero(ksp,pcbddc->ksp_guess_nonzero);CHKERRQ(ierr); 1487 } 1488 /* reset flag for exact dirichlet trick */ 1489 pcbddc->exact_dirichlet_trick_app = PETSC_FALSE; 1490 PetscFunctionReturn(0); 1491 } 1492 #undef __FUNCT__ 1493 #define __FUNCT__ "PCSetUp_BDDC" 1494 /* 1495 PCSetUp_BDDC - Prepares for the use of the BDDC preconditioner 1496 by setting data structures and options. 1497 1498 Input Parameter: 1499 + pc - the preconditioner context 1500 1501 Application Interface Routine: PCSetUp() 1502 1503 Notes: 1504 The interface routine PCSetUp() is not usually called directly by 1505 the user, but instead is called by PCApply() if necessary. 1506 */ 1507 PetscErrorCode PCSetUp_BDDC(PC pc) 1508 { 1509 PC_BDDC* pcbddc = (PC_BDDC*)pc->data; 1510 PCBDDCSubSchurs sub_schurs; 1511 Mat_IS* matis; 1512 MatNullSpace nearnullspace; 1513 IS zerodiag = NULL; 1514 PetscInt nrows,ncols; 1515 PetscBool computesubschurs; 1516 PetscBool computeconstraintsmatrix; 1517 PetscBool new_nearnullspace_provided,ismatis; 1518 PetscErrorCode ierr; 1519 1520 PetscFunctionBegin; 1521 ierr = PetscObjectTypeCompare((PetscObject)pc->pmat,MATIS,&ismatis);CHKERRQ(ierr); 1522 if (!ismatis) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONG,"PCBDDC preconditioner requires matrix of type MATIS"); 1523 ierr = MatGetSize(pc->pmat,&nrows,&ncols);CHKERRQ(ierr); 1524 if (nrows != ncols) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"PCBDDC preconditioner requires a square preconditioning matrix"); 1525 matis = (Mat_IS*)pc->pmat->data; 1526 /* the following lines of code should be replaced by a better logic between PCIS, PCNN, PCBDDC and other future nonoverlapping preconditioners */ 1527 /* For BDDC we need to define a local "Neumann" problem different to that defined in PCISSetup 1528 Also, BDDC builds its own KSP for the Dirichlet problem */ 1529 if (pc->setupcalled && pc->flag != SAME_NONZERO_PATTERN) pcbddc->recompute_topography = PETSC_TRUE; 1530 if (pcbddc->recompute_topography) { 1531 pcbddc->graphanalyzed = PETSC_FALSE; 1532 computeconstraintsmatrix = PETSC_TRUE; 1533 } else { 1534 computeconstraintsmatrix = PETSC_FALSE; 1535 } 1536 1537 /* check parameters' compatibility */ 1538 if (!pcbddc->use_deluxe_scaling) pcbddc->deluxe_zerorows = PETSC_FALSE; 1539 pcbddc->adaptive_selection = (PetscBool)(pcbddc->adaptive_threshold > 0.0); 1540 pcbddc->adaptive_userdefined = (PetscBool)(pcbddc->adaptive_selection && pcbddc->adaptive_userdefined); 1541 if (pcbddc->adaptive_selection) pcbddc->use_faces = PETSC_TRUE; 1542 1543 computesubschurs = (PetscBool)(pcbddc->adaptive_selection || pcbddc->use_deluxe_scaling); 1544 if (pcbddc->switch_static) { 1545 PetscBool ismatis; 1546 ierr = PetscObjectTypeCompare((PetscObject)pc->mat,MATIS,&ismatis);CHKERRQ(ierr); 1547 if (!ismatis) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"When the static switch is one, the iteration matrix should be of type MATIS"); 1548 } 1549 1550 /* activate all connected components if the netflux has been requested */ 1551 if (pcbddc->compute_nonetflux) { 1552 pcbddc->use_vertices = PETSC_TRUE; 1553 pcbddc->use_edges = PETSC_TRUE; 1554 pcbddc->use_faces = PETSC_TRUE; 1555 } 1556 1557 /* Get stdout for dbg */ 1558 if (pcbddc->dbg_flag) { 1559 if (!pcbddc->dbg_viewer) { 1560 pcbddc->dbg_viewer = PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)pc)); 1561 ierr = PetscViewerASCIIPushSynchronized(pcbddc->dbg_viewer);CHKERRQ(ierr); 1562 } 1563 ierr = PetscViewerASCIIAddTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1564 } 1565 1566 /* process topology information */ 1567 if (pcbddc->recompute_topography) { 1568 ierr = PCBDDCComputeLocalTopologyInfo(pc);CHKERRQ(ierr); 1569 /* detect local disconnected subdomains if requested (use matis->A) */ 1570 if (pcbddc->detect_disconnected) { 1571 PetscInt i; 1572 for (i=0;i<pcbddc->n_local_subs;i++) { 1573 ierr = ISDestroy(&pcbddc->local_subs[i]);CHKERRQ(ierr); 1574 } 1575 ierr = PetscFree(pcbddc->local_subs);CHKERRQ(ierr); 1576 ierr = MatDetectDisconnectedComponents(matis->A,PETSC_FALSE,&pcbddc->n_local_subs,&pcbddc->local_subs);CHKERRQ(ierr); 1577 } 1578 if (pcbddc->discretegradient) { 1579 ierr = PCBDDCNedelecSupport(pc);CHKERRQ(ierr); 1580 } 1581 } 1582 1583 /* change basis if requested by the user */ 1584 if (pcbddc->user_ChangeOfBasisMatrix) { 1585 /* use_change_of_basis flag is used to automatically compute a change of basis from constraints */ 1586 pcbddc->use_change_of_basis = PETSC_FALSE; 1587 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->user_ChangeOfBasisMatrix);CHKERRQ(ierr); 1588 } else { 1589 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1590 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1591 pcbddc->local_mat = matis->A; 1592 } 1593 1594 /* 1595 Compute change of basis on local pressures (aka zerodiag dofs) with the benign trick 1596 This should come earlier then PCISSetUp for extracting the correct subdomain matrices 1597 */ 1598 ierr = PCBDDCBenignShellMat(pc,PETSC_TRUE);CHKERRQ(ierr); 1599 if (pcbddc->benign_saddle_point) { 1600 PC_IS* pcis = (PC_IS*)pc->data; 1601 1602 if (pcbddc->user_ChangeOfBasisMatrix || pcbddc->use_change_of_basis || !computesubschurs) pcbddc->benign_change_explicit = PETSC_TRUE; 1603 /* detect local saddle point and change the basis in pcbddc->local_mat (TODO: reuse case) */ 1604 ierr = PCBDDCBenignDetectSaddlePoint(pc,&zerodiag);CHKERRQ(ierr); 1605 /* pop B0 mat from local mat */ 1606 ierr = PCBDDCBenignPopOrPushB0(pc,PETSC_TRUE);CHKERRQ(ierr); 1607 /* give pcis a hint to not reuse submatrices during PCISCreate */ 1608 if (pc->flag == SAME_NONZERO_PATTERN && pcis->reusesubmatrices == PETSC_TRUE) { 1609 if (pcbddc->benign_n && (pcbddc->benign_change_explicit || pcbddc->dbg_flag)) { 1610 pcis->reusesubmatrices = PETSC_FALSE; 1611 } else { 1612 pcis->reusesubmatrices = PETSC_TRUE; 1613 } 1614 } else { 1615 pcis->reusesubmatrices = PETSC_FALSE; 1616 } 1617 } 1618 1619 /* propagate relevant information -> TODO remove*/ 1620 #if !defined(PETSC_USE_COMPLEX) /* workaround for reals */ 1621 if (matis->A->symmetric_set) { 1622 ierr = MatSetOption(pcbddc->local_mat,MAT_HERMITIAN,matis->A->symmetric);CHKERRQ(ierr); 1623 } 1624 #endif 1625 if (matis->A->symmetric_set) { 1626 ierr = MatSetOption(pcbddc->local_mat,MAT_SYMMETRIC,matis->A->symmetric);CHKERRQ(ierr); 1627 } 1628 if (matis->A->spd_set) { 1629 ierr = MatSetOption(pcbddc->local_mat,MAT_SPD,matis->A->spd);CHKERRQ(ierr); 1630 } 1631 1632 /* Set up all the "iterative substructuring" common block without computing solvers */ 1633 { 1634 Mat temp_mat; 1635 1636 temp_mat = matis->A; 1637 matis->A = pcbddc->local_mat; 1638 ierr = PCISSetUp(pc,PETSC_FALSE);CHKERRQ(ierr); 1639 pcbddc->local_mat = matis->A; 1640 matis->A = temp_mat; 1641 } 1642 1643 /* Analyze interface */ 1644 if (!pcbddc->graphanalyzed) { 1645 ierr = PCBDDCAnalyzeInterface(pc);CHKERRQ(ierr); 1646 computeconstraintsmatrix = PETSC_TRUE; 1647 if (pcbddc->adaptive_selection && !pcbddc->use_deluxe_scaling && !pcbddc->mat_graph->twodim) { 1648 SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"Cannot compute the adaptive primal space for a problem with 3D edges without deluxe scaling"); 1649 } 1650 if (pcbddc->compute_nonetflux) { 1651 MatNullSpace nnfnnsp; 1652 1653 ierr = PCBDDCComputeNoNetFlux(pc->pmat,pcbddc->divudotp,pcbddc->divudotp_trans,pcbddc->divudotp_vl2l,pcbddc->mat_graph,&nnfnnsp);CHKERRQ(ierr); 1654 /* TODO what if a nearnullspace is already attached? */ 1655 ierr = MatSetNearNullSpace(pc->pmat,nnfnnsp);CHKERRQ(ierr); 1656 ierr = MatNullSpaceDestroy(&nnfnnsp);CHKERRQ(ierr); 1657 } 1658 } 1659 1660 /* check existence of a divergence free extension, i.e. 1661 b(v_I,p_0) = 0 for all v_I (raise error if not). 1662 Also, check that PCBDDCBenignGetOrSetP0 works */ 1663 #if defined(PETSC_USE_DEBUG) 1664 if (pcbddc->benign_saddle_point) { 1665 ierr = PCBDDCBenignCheck(pc,zerodiag);CHKERRQ(ierr); 1666 } 1667 #endif 1668 ierr = ISDestroy(&zerodiag);CHKERRQ(ierr); 1669 1670 /* Setup local dirichlet solver ksp_D and sub_schurs solvers */ 1671 if (computesubschurs && pcbddc->recompute_topography) { 1672 ierr = PCBDDCInitSubSchurs(pc);CHKERRQ(ierr); 1673 } 1674 /* SetUp Scaling operator (scaling matrices could be needed in SubSchursSetUp)*/ 1675 if (!pcbddc->use_deluxe_scaling) { 1676 ierr = PCBDDCScalingSetUp(pc);CHKERRQ(ierr); 1677 } 1678 1679 /* finish setup solvers and do adaptive selection of constraints */ 1680 sub_schurs = pcbddc->sub_schurs; 1681 if (sub_schurs && sub_schurs->schur_explicit) { 1682 if (computesubschurs) { 1683 ierr = PCBDDCSetUpSubSchurs(pc);CHKERRQ(ierr); 1684 } 1685 ierr = PCBDDCSetUpLocalSolvers(pc,PETSC_TRUE,PETSC_FALSE);CHKERRQ(ierr); 1686 } else { 1687 ierr = PCBDDCSetUpLocalSolvers(pc,PETSC_TRUE,PETSC_FALSE);CHKERRQ(ierr); 1688 if (computesubschurs) { 1689 ierr = PCBDDCSetUpSubSchurs(pc);CHKERRQ(ierr); 1690 } 1691 } 1692 if (pcbddc->adaptive_selection) { 1693 ierr = PCBDDCAdaptiveSelection(pc);CHKERRQ(ierr); 1694 computeconstraintsmatrix = PETSC_TRUE; 1695 } 1696 1697 /* infer if NullSpace object attached to Mat via MatSetNearNullSpace has changed */ 1698 new_nearnullspace_provided = PETSC_FALSE; 1699 ierr = MatGetNearNullSpace(pc->pmat,&nearnullspace);CHKERRQ(ierr); 1700 if (pcbddc->onearnullspace) { /* already used nearnullspace */ 1701 if (!nearnullspace) { /* near null space attached to mat has been destroyed */ 1702 new_nearnullspace_provided = PETSC_TRUE; 1703 } else { 1704 /* determine if the two nullspaces are different (should be lightweight) */ 1705 if (nearnullspace != pcbddc->onearnullspace) { 1706 new_nearnullspace_provided = PETSC_TRUE; 1707 } else { /* maybe the user has changed the content of the nearnullspace so check vectors ObjectStateId */ 1708 PetscInt i; 1709 const Vec *nearnullvecs; 1710 PetscObjectState state; 1711 PetscInt nnsp_size; 1712 ierr = MatNullSpaceGetVecs(nearnullspace,NULL,&nnsp_size,&nearnullvecs);CHKERRQ(ierr); 1713 for (i=0;i<nnsp_size;i++) { 1714 ierr = PetscObjectStateGet((PetscObject)nearnullvecs[i],&state);CHKERRQ(ierr); 1715 if (pcbddc->onearnullvecs_state[i] != state) { 1716 new_nearnullspace_provided = PETSC_TRUE; 1717 break; 1718 } 1719 } 1720 } 1721 } 1722 } else { 1723 if (!nearnullspace) { /* both nearnullspaces are null */ 1724 new_nearnullspace_provided = PETSC_FALSE; 1725 } else { /* nearnullspace attached later */ 1726 new_nearnullspace_provided = PETSC_TRUE; 1727 } 1728 } 1729 1730 /* Setup constraints and related work vectors */ 1731 /* reset primal space flags */ 1732 pcbddc->new_primal_space = PETSC_FALSE; 1733 pcbddc->new_primal_space_local = PETSC_FALSE; 1734 if (computeconstraintsmatrix || new_nearnullspace_provided) { 1735 /* It also sets the primal space flags */ 1736 ierr = PCBDDCConstraintsSetUp(pc);CHKERRQ(ierr); 1737 } 1738 /* Allocate needed local vectors (which depends on quantities defined during ConstraintsSetUp) */ 1739 ierr = PCBDDCSetUpLocalWorkVectors(pc);CHKERRQ(ierr); 1740 1741 if (pcbddc->use_change_of_basis) { 1742 PC_IS *pcis = (PC_IS*)(pc->data); 1743 1744 ierr = PCBDDCComputeLocalMatrix(pc,pcbddc->ChangeOfBasisMatrix);CHKERRQ(ierr); 1745 if (pcbddc->benign_change) { 1746 ierr = MatDestroy(&pcbddc->benign_B0);CHKERRQ(ierr); 1747 /* pop B0 from pcbddc->local_mat */ 1748 ierr = PCBDDCBenignPopOrPushB0(pc,PETSC_TRUE);CHKERRQ(ierr); 1749 } 1750 /* get submatrices */ 1751 ierr = MatDestroy(&pcis->A_IB);CHKERRQ(ierr); 1752 ierr = MatDestroy(&pcis->A_BI);CHKERRQ(ierr); 1753 ierr = MatDestroy(&pcis->A_BB);CHKERRQ(ierr); 1754 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_BB);CHKERRQ(ierr); 1755 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_I_local,pcis->is_B_local,MAT_INITIAL_MATRIX,&pcis->A_IB);CHKERRQ(ierr); 1756 ierr = MatGetSubMatrix(pcbddc->local_mat,pcis->is_B_local,pcis->is_I_local,MAT_INITIAL_MATRIX,&pcis->A_BI);CHKERRQ(ierr); 1757 /* set flag in pcis to not reuse submatrices during PCISCreate */ 1758 pcis->reusesubmatrices = PETSC_FALSE; 1759 } else if (!pcbddc->user_ChangeOfBasisMatrix && !pcbddc->benign_change) { 1760 ierr = MatDestroy(&pcbddc->local_mat);CHKERRQ(ierr); 1761 ierr = PetscObjectReference((PetscObject)matis->A);CHKERRQ(ierr); 1762 pcbddc->local_mat = matis->A; 1763 } 1764 /* SetUp coarse and local Neumann solvers */ 1765 ierr = PCBDDCSetUpSolvers(pc);CHKERRQ(ierr); 1766 /* SetUp Scaling operator */ 1767 if (pcbddc->use_deluxe_scaling) { 1768 ierr = PCBDDCScalingSetUp(pc);CHKERRQ(ierr); 1769 } 1770 1771 /* mark topography as done */ 1772 pcbddc->recompute_topography = PETSC_FALSE; 1773 1774 /* wrap pcis->A_IB and pcis->A_BI if we did not change explicitly the variables on the pressures */ 1775 ierr = PCBDDCBenignShellMat(pc,PETSC_FALSE);CHKERRQ(ierr); 1776 1777 if (pcbddc->dbg_flag) { 1778 ierr = PetscViewerASCIISubtractTab(pcbddc->dbg_viewer,2*pcbddc->current_level);CHKERRQ(ierr); 1779 } 1780 PetscFunctionReturn(0); 1781 } 1782 1783 /* 1784 PCApply_BDDC - Applies the BDDC operator to a vector. 1785 1786 Input Parameters: 1787 + pc - the preconditioner context 1788 - r - input vector (global) 1789 1790 Output Parameter: 1791 . z - output vector (global) 1792 1793 Application Interface Routine: PCApply() 1794 */ 1795 #undef __FUNCT__ 1796 #define __FUNCT__ "PCApply_BDDC" 1797 PetscErrorCode PCApply_BDDC(PC pc,Vec r,Vec z) 1798 { 1799 PC_IS *pcis = (PC_IS*)(pc->data); 1800 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1801 PetscInt n_B = pcis->n_B, n_D = pcis->n - n_B; 1802 PetscErrorCode ierr; 1803 const PetscScalar one = 1.0; 1804 const PetscScalar m_one = -1.0; 1805 const PetscScalar zero = 0.0; 1806 1807 /* This code is similar to that provided in nn.c for PCNN 1808 NN interface preconditioner changed to BDDC 1809 Added support for M_3 preconditioner in the reference article (code is active if pcbddc->switch_static == PETSC_TRUE) */ 1810 1811 PetscFunctionBegin; 1812 if (pcbddc->ChangeOfBasisMatrix) { 1813 Vec swap; 1814 1815 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,r,pcbddc->work_change);CHKERRQ(ierr); 1816 swap = pcbddc->work_change; 1817 pcbddc->work_change = r; 1818 r = swap; 1819 /* save rhs so that we don't need to apply the change of basis for the exact dirichlet trick in PreSolve */ 1820 if (pcbddc->benign_apply_coarse_only && pcbddc->use_exact_dirichlet_trick && pcbddc->change_interior) { 1821 ierr = VecCopy(r,pcis->vec1_global);CHKERRQ(ierr); 1822 ierr = VecLockPush(pcis->vec1_global);CHKERRQ(ierr); 1823 } 1824 } 1825 if (pcbddc->benign_have_null) { /* get p0 from r */ 1826 ierr = PCBDDCBenignGetOrSetP0(pc,r,PETSC_TRUE);CHKERRQ(ierr); 1827 } 1828 if (!pcbddc->exact_dirichlet_trick_app && !pcbddc->benign_apply_coarse_only) { 1829 ierr = VecCopy(r,z);CHKERRQ(ierr); 1830 /* First Dirichlet solve */ 1831 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1832 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1833 /* 1834 Assembling right hand side for BDDC operator 1835 - pcis->vec1_D for the Dirichlet part (if needed, i.e. pcbddc->switch_static == PETSC_TRUE) 1836 - pcis->vec1_B the interface part of the global vector z 1837 */ 1838 if (n_D) { 1839 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 1840 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 1841 if (pcbddc->switch_static) { 1842 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1843 1844 ierr = VecSet(pcis->vec1_N,0.);CHKERRQ(ierr); 1845 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1846 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1847 if (!pcbddc->switch_static_change) { 1848 ierr = MatMult(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1849 } else { 1850 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1851 ierr = MatMult(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 1852 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1853 } 1854 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1855 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1856 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1857 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1858 } else { 1859 ierr = MatMult(pcis->A_BI,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 1860 } 1861 } else { 1862 ierr = VecSet(pcis->vec1_B,zero);CHKERRQ(ierr); 1863 } 1864 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1865 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1866 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 1867 } else { 1868 if (!pcbddc->benign_apply_coarse_only) { 1869 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 1870 } 1871 } 1872 1873 /* Apply interface preconditioner 1874 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 1875 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_FALSE);CHKERRQ(ierr); 1876 1877 /* Apply transpose of partition of unity operator */ 1878 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 1879 1880 /* Second Dirichlet solve and assembling of output */ 1881 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1882 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1883 if (n_B) { 1884 if (pcbddc->switch_static) { 1885 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1886 1887 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1888 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1889 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1890 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1891 if (!pcbddc->switch_static_change) { 1892 ierr = MatMult(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1893 } else { 1894 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1895 ierr = MatMult(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 1896 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1897 } 1898 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1899 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1900 } else { 1901 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 1902 } 1903 } else if (pcbddc->switch_static) { /* n_B is zero */ 1904 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 1905 1906 if (!pcbddc->switch_static_change) { 1907 ierr = MatMult(matis->A,pcis->vec1_D,pcis->vec3_D);CHKERRQ(ierr); 1908 } else { 1909 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_D,pcis->vec1_N);CHKERRQ(ierr); 1910 ierr = MatMult(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 1911 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec2_N,pcis->vec3_D);CHKERRQ(ierr); 1912 } 1913 } 1914 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 1915 1916 if (!pcbddc->exact_dirichlet_trick_app && !pcbddc->benign_apply_coarse_only) { 1917 if (pcbddc->switch_static) { 1918 ierr = VecAXPBYPCZ(pcis->vec2_D,m_one,one,m_one,pcis->vec4_D,pcis->vec1_D);CHKERRQ(ierr); 1919 } else { 1920 ierr = VecAXPBY(pcis->vec2_D,m_one,m_one,pcis->vec4_D);CHKERRQ(ierr); 1921 } 1922 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1923 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1924 } else { 1925 if (pcbddc->switch_static) { 1926 ierr = VecAXPBY(pcis->vec4_D,one,m_one,pcis->vec1_D);CHKERRQ(ierr); 1927 } else { 1928 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 1929 } 1930 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1931 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 1932 } 1933 if (pcbddc->benign_have_null) { /* set p0 (computed in PCBDDCApplyInterface) */ 1934 if (pcbddc->benign_apply_coarse_only) { 1935 ierr = PetscMemzero(pcbddc->benign_p0,pcbddc->benign_n*sizeof(PetscScalar));CHKERRQ(ierr); 1936 } 1937 ierr = PCBDDCBenignGetOrSetP0(pc,z,PETSC_FALSE);CHKERRQ(ierr); 1938 } 1939 1940 if (pcbddc->ChangeOfBasisMatrix) { 1941 pcbddc->work_change = r; 1942 ierr = VecCopy(z,pcbddc->work_change);CHKERRQ(ierr); 1943 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,pcbddc->work_change,z);CHKERRQ(ierr); 1944 } 1945 PetscFunctionReturn(0); 1946 } 1947 1948 /* 1949 PCApplyTranspose_BDDC - Applies the transpose of the BDDC operator to a vector. 1950 1951 Input Parameters: 1952 + pc - the preconditioner context 1953 - r - input vector (global) 1954 1955 Output Parameter: 1956 . z - output vector (global) 1957 1958 Application Interface Routine: PCApplyTranspose() 1959 */ 1960 #undef __FUNCT__ 1961 #define __FUNCT__ "PCApplyTranspose_BDDC" 1962 PetscErrorCode PCApplyTranspose_BDDC(PC pc,Vec r,Vec z) 1963 { 1964 PC_IS *pcis = (PC_IS*)(pc->data); 1965 PC_BDDC *pcbddc = (PC_BDDC*)(pc->data); 1966 PetscInt n_B = pcis->n_B, n_D = pcis->n - n_B; 1967 PetscErrorCode ierr; 1968 const PetscScalar one = 1.0; 1969 const PetscScalar m_one = -1.0; 1970 const PetscScalar zero = 0.0; 1971 1972 PetscFunctionBegin; 1973 if (pcbddc->ChangeOfBasisMatrix) { 1974 Vec swap; 1975 1976 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,r,pcbddc->work_change);CHKERRQ(ierr); 1977 swap = pcbddc->work_change; 1978 pcbddc->work_change = r; 1979 r = swap; 1980 /* save rhs so that we don't need to apply the change of basis for the exact dirichlet trick in PreSolve */ 1981 if (pcbddc->benign_apply_coarse_only && pcbddc->exact_dirichlet_trick_app && pcbddc->change_interior) { 1982 ierr = VecCopy(r,pcis->vec1_global);CHKERRQ(ierr); 1983 ierr = VecLockPush(pcis->vec1_global);CHKERRQ(ierr); 1984 } 1985 } 1986 if (pcbddc->benign_have_null) { /* get p0 from r */ 1987 ierr = PCBDDCBenignGetOrSetP0(pc,r,PETSC_TRUE);CHKERRQ(ierr); 1988 } 1989 if (!pcbddc->exact_dirichlet_trick_app && !pcbddc->benign_apply_coarse_only) { 1990 ierr = VecCopy(r,z);CHKERRQ(ierr); 1991 /* First Dirichlet solve */ 1992 ierr = VecScatterBegin(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1993 ierr = VecScatterEnd(pcis->global_to_D,r,pcis->vec1_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 1994 /* 1995 Assembling right hand side for BDDC operator 1996 - pcis->vec1_D for the Dirichlet part (if needed, i.e. pcbddc->switch_static == PETSC_TRUE) 1997 - pcis->vec1_B the interface part of the global vector z 1998 */ 1999 if (n_D) { 2000 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec1_D,pcis->vec2_D);CHKERRQ(ierr); 2001 ierr = VecScale(pcis->vec2_D,m_one);CHKERRQ(ierr); 2002 if (pcbddc->switch_static) { 2003 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 2004 2005 ierr = VecSet(pcis->vec1_N,0.);CHKERRQ(ierr); 2006 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2007 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2008 if (!pcbddc->switch_static_change) { 2009 ierr = MatMultTranspose(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2010 } else { 2011 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2012 ierr = MatMultTranspose(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 2013 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2014 } 2015 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2016 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec1_D,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2017 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2018 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec2_N,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2019 } else { 2020 ierr = MatMultTranspose(pcis->A_IB,pcis->vec2_D,pcis->vec1_B);CHKERRQ(ierr); 2021 } 2022 } else { 2023 ierr = VecSet(pcis->vec1_B,zero);CHKERRQ(ierr); 2024 } 2025 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2026 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,z,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2027 ierr = PCBDDCScalingRestriction(pc,z,pcis->vec1_B);CHKERRQ(ierr); 2028 } else { 2029 ierr = PCBDDCScalingRestriction(pc,r,pcis->vec1_B);CHKERRQ(ierr); 2030 } 2031 2032 /* Apply interface preconditioner 2033 input/output vecs: pcis->vec1_B and pcis->vec1_D */ 2034 ierr = PCBDDCApplyInterfacePreconditioner(pc,PETSC_TRUE);CHKERRQ(ierr); 2035 2036 /* Apply transpose of partition of unity operator */ 2037 ierr = PCBDDCScalingExtension(pc,pcis->vec1_B,z);CHKERRQ(ierr); 2038 2039 /* Second Dirichlet solve and assembling of output */ 2040 ierr = VecScatterBegin(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2041 ierr = VecScatterEnd(pcis->global_to_B,z,pcis->vec1_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2042 if (n_B) { 2043 if (pcbddc->switch_static) { 2044 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 2045 2046 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2047 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec1_D,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2048 ierr = VecScatterBegin(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2049 ierr = VecScatterEnd(pcis->N_to_B,pcis->vec1_B,pcis->vec1_N,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2050 if (!pcbddc->switch_static_change) { 2051 ierr = MatMultTranspose(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2052 } else { 2053 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2054 ierr = MatMultTranspose(matis->A,pcis->vec2_N,pcis->vec1_N);CHKERRQ(ierr); 2055 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2056 } 2057 ierr = VecScatterBegin(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2058 ierr = VecScatterEnd(pcis->N_to_D,pcis->vec2_N,pcis->vec3_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2059 } else { 2060 ierr = MatMultTranspose(pcis->A_BI,pcis->vec1_B,pcis->vec3_D);CHKERRQ(ierr); 2061 } 2062 } else if (pcbddc->switch_static) { /* n_B is zero */ 2063 Mat_IS *matis = (Mat_IS*)(pc->mat->data); 2064 2065 if (!pcbddc->switch_static_change) { 2066 ierr = MatMultTranspose(matis->A,pcis->vec1_D,pcis->vec3_D);CHKERRQ(ierr); 2067 } else { 2068 ierr = MatMult(pcbddc->switch_static_change,pcis->vec1_D,pcis->vec1_N);CHKERRQ(ierr); 2069 ierr = MatMultTranspose(matis->A,pcis->vec1_N,pcis->vec2_N);CHKERRQ(ierr); 2070 ierr = MatMultTranspose(pcbddc->switch_static_change,pcis->vec2_N,pcis->vec3_D);CHKERRQ(ierr); 2071 } 2072 } 2073 ierr = KSPSolveTranspose(pcbddc->ksp_D,pcis->vec3_D,pcis->vec4_D);CHKERRQ(ierr); 2074 if (!pcbddc->exact_dirichlet_trick_app && !pcbddc->benign_apply_coarse_only) { 2075 if (pcbddc->switch_static) { 2076 ierr = VecAXPBYPCZ(pcis->vec2_D,m_one,one,m_one,pcis->vec4_D,pcis->vec1_D);CHKERRQ(ierr); 2077 } else { 2078 ierr = VecAXPBY(pcis->vec2_D,m_one,m_one,pcis->vec4_D);CHKERRQ(ierr); 2079 } 2080 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2081 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec2_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2082 } else { 2083 if (pcbddc->switch_static) { 2084 ierr = VecAXPBY(pcis->vec4_D,one,m_one,pcis->vec1_D);CHKERRQ(ierr); 2085 } else { 2086 ierr = VecScale(pcis->vec4_D,m_one);CHKERRQ(ierr); 2087 } 2088 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2089 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec4_D,z,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2090 } 2091 if (pcbddc->benign_have_null) { /* set p0 (computed in PCBDDCApplyInterface) */ 2092 ierr = PCBDDCBenignGetOrSetP0(pc,z,PETSC_FALSE);CHKERRQ(ierr); 2093 } 2094 if (pcbddc->ChangeOfBasisMatrix) { 2095 pcbddc->work_change = r; 2096 ierr = VecCopy(z,pcbddc->work_change);CHKERRQ(ierr); 2097 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,pcbddc->work_change,z);CHKERRQ(ierr); 2098 } 2099 PetscFunctionReturn(0); 2100 } 2101 2102 #undef __FUNCT__ 2103 #define __FUNCT__ "PCDestroy_BDDC" 2104 PetscErrorCode PCDestroy_BDDC(PC pc) 2105 { 2106 PC_BDDC *pcbddc = (PC_BDDC*)pc->data; 2107 PetscErrorCode ierr; 2108 2109 PetscFunctionBegin; 2110 /* free BDDC custom data */ 2111 ierr = PCBDDCResetCustomization(pc);CHKERRQ(ierr); 2112 /* destroy objects related to topography */ 2113 ierr = PCBDDCResetTopography(pc);CHKERRQ(ierr); 2114 /* free allocated graph structure */ 2115 ierr = PetscFree(pcbddc->mat_graph);CHKERRQ(ierr); 2116 /* free allocated sub schurs structure */ 2117 ierr = PetscFree(pcbddc->sub_schurs);CHKERRQ(ierr); 2118 /* destroy objects for scaling operator */ 2119 ierr = PCBDDCScalingDestroy(pc);CHKERRQ(ierr); 2120 ierr = PetscFree(pcbddc->deluxe_ctx);CHKERRQ(ierr); 2121 /* free solvers stuff */ 2122 ierr = PCBDDCResetSolvers(pc);CHKERRQ(ierr); 2123 /* free global vectors needed in presolve */ 2124 ierr = VecDestroy(&pcbddc->temp_solution);CHKERRQ(ierr); 2125 ierr = VecDestroy(&pcbddc->original_rhs);CHKERRQ(ierr); 2126 /* free data created by PCIS */ 2127 ierr = PCISDestroy(pc);CHKERRQ(ierr); 2128 /* remove functions */ 2129 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDiscreteGradient_C",NULL);CHKERRQ(ierr); 2130 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDivergenceMat_C",NULL);CHKERRQ(ierr); 2131 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",NULL);CHKERRQ(ierr); 2132 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",NULL);CHKERRQ(ierr); 2133 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesIS_C",NULL);CHKERRQ(ierr); 2134 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",NULL);CHKERRQ(ierr); 2135 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",NULL);CHKERRQ(ierr); 2136 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",NULL);CHKERRQ(ierr); 2137 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",NULL);CHKERRQ(ierr); 2138 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 2139 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 2140 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 2141 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 2142 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",NULL);CHKERRQ(ierr); 2143 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",NULL);CHKERRQ(ierr); 2144 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",NULL);CHKERRQ(ierr); 2145 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",NULL);CHKERRQ(ierr); 2146 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",NULL);CHKERRQ(ierr); 2147 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",NULL);CHKERRQ(ierr); 2148 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",NULL);CHKERRQ(ierr); 2149 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",NULL);CHKERRQ(ierr); 2150 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",NULL);CHKERRQ(ierr); 2151 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",NULL);CHKERRQ(ierr); 2152 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCPreSolveChangeRHS_C",NULL);CHKERRQ(ierr); 2153 /* Free the private data structure */ 2154 ierr = PetscFree(pc->data);CHKERRQ(ierr); 2155 PetscFunctionReturn(0); 2156 } 2157 2158 #undef __FUNCT__ 2159 #define __FUNCT__ "PCPreSolveChangeRHS_BDDC" 2160 static PetscErrorCode PCPreSolveChangeRHS_BDDC(PC pc, PetscBool* change) 2161 { 2162 PetscFunctionBegin; 2163 *change = PETSC_TRUE; 2164 PetscFunctionReturn(0); 2165 } 2166 2167 #undef __FUNCT__ 2168 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS_BDDC" 2169 static PetscErrorCode PCBDDCMatFETIDPGetRHS_BDDC(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 2170 { 2171 FETIDPMat_ctx mat_ctx; 2172 Vec work; 2173 PC_IS* pcis; 2174 PC_BDDC* pcbddc; 2175 PetscErrorCode ierr; 2176 2177 PetscFunctionBegin; 2178 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2179 pcis = (PC_IS*)mat_ctx->pc->data; 2180 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 2181 2182 /* 2183 change of basis for physical rhs if needed 2184 It also changes the rhs in case of dirichlet boundaries 2185 */ 2186 if (!pcbddc->original_rhs) { 2187 ierr = VecDuplicate(pcis->vec1_global,&pcbddc->original_rhs);CHKERRQ(ierr); 2188 } 2189 ierr = VecCopy(standard_rhs,pcbddc->original_rhs);CHKERRQ(ierr); 2190 ierr = PCPreSolve_BDDC(mat_ctx->pc,NULL,pcbddc->original_rhs,NULL);CHKERRQ(ierr); 2191 if (pcbddc->ChangeOfBasisMatrix) { 2192 ierr = MatMultTranspose(pcbddc->ChangeOfBasisMatrix,pcbddc->original_rhs,pcbddc->work_change);CHKERRQ(ierr); 2193 work = pcbddc->work_change; 2194 } else { 2195 work = pcbddc->original_rhs; 2196 } 2197 /* store vectors for computation of fetidp final solution */ 2198 ierr = VecScatterBegin(pcis->global_to_D,work,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2199 ierr = VecScatterEnd(pcis->global_to_D,work,mat_ctx->temp_solution_D,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2200 /* scale rhs since it should be unassembled */ 2201 /* TODO use counter scaling? (also below) */ 2202 ierr = VecScatterBegin(pcis->global_to_B,work,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2203 ierr = VecScatterEnd(pcis->global_to_B,work,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2204 /* Apply partition of unity */ 2205 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 2206 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,work,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 2207 if (!pcbddc->switch_static) { 2208 /* compute partially subassembled Schur complement right-hand side */ 2209 ierr = KSPSolve(pcbddc->ksp_D,mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 2210 ierr = MatMult(pcis->A_BI,pcis->vec1_D,pcis->vec1_B);CHKERRQ(ierr); 2211 ierr = VecAXPY(mat_ctx->temp_solution_B,-1.0,pcis->vec1_B);CHKERRQ(ierr); 2212 ierr = VecSet(work,0.0);CHKERRQ(ierr); 2213 ierr = VecScatterBegin(pcis->global_to_B,mat_ctx->temp_solution_B,work,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2214 ierr = VecScatterEnd(pcis->global_to_B,mat_ctx->temp_solution_B,work,ADD_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2215 /* ierr = PCBDDCScalingRestriction(mat_ctx->pc,work,mat_ctx->temp_solution_B);CHKERRQ(ierr); */ 2216 ierr = VecScatterBegin(pcis->global_to_B,work,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2217 ierr = VecScatterEnd(pcis->global_to_B,work,mat_ctx->temp_solution_B,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2218 ierr = VecPointwiseMult(mat_ctx->temp_solution_B,pcis->D,mat_ctx->temp_solution_B);CHKERRQ(ierr); 2219 } 2220 /* BDDC rhs */ 2221 ierr = VecCopy(mat_ctx->temp_solution_B,pcis->vec1_B);CHKERRQ(ierr); 2222 if (pcbddc->switch_static) { 2223 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 2224 } 2225 ierr = PetscMemzero(pcbddc->benign_p0,pcbddc->benign_n*sizeof(PetscScalar));CHKERRQ(ierr); 2226 /* apply BDDC */ 2227 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 2228 ierr = PetscMemzero(pcbddc->benign_p0,pcbddc->benign_n*sizeof(PetscScalar));CHKERRQ(ierr); 2229 /* Application of B_delta and assembling of rhs for fetidp fluxes */ 2230 ierr = VecSet(fetidp_flux_rhs,0.0);CHKERRQ(ierr); 2231 ierr = MatMult(mat_ctx->B_delta,pcis->vec1_B,mat_ctx->lambda_local);CHKERRQ(ierr); 2232 ierr = VecScatterBegin(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2233 ierr = VecScatterEnd(mat_ctx->l2g_lambda,mat_ctx->lambda_local,fetidp_flux_rhs,ADD_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 2234 PetscFunctionReturn(0); 2235 } 2236 2237 #undef __FUNCT__ 2238 #define __FUNCT__ "PCBDDCMatFETIDPGetRHS" 2239 /*@ 2240 PCBDDCMatFETIDPGetRHS - Compute the right-hand side for FETI-DP linear system using the physical right-hand side 2241 2242 Collective 2243 2244 Input Parameters: 2245 + fetidp_mat - the FETI-DP matrix object obtained by a call to PCBDDCCreateFETIDPOperators 2246 - standard_rhs - the right-hand side of the original linear system 2247 2248 Output Parameters: 2249 . fetidp_flux_rhs - the right-hand side for the FETI-DP linear system 2250 2251 Level: developer 2252 2253 Notes: 2254 2255 .seealso: PCBDDC, PCBDDCCreateFETIDPOperators, PCBDDCMatFETIDPGetSolution 2256 @*/ 2257 PetscErrorCode PCBDDCMatFETIDPGetRHS(Mat fetidp_mat, Vec standard_rhs, Vec fetidp_flux_rhs) 2258 { 2259 FETIDPMat_ctx mat_ctx; 2260 PetscErrorCode ierr; 2261 2262 PetscFunctionBegin; 2263 PetscValidHeaderSpecific(fetidp_mat,MAT_CLASSID,1); 2264 PetscValidHeaderSpecific(standard_rhs,VEC_CLASSID,2); 2265 PetscValidHeaderSpecific(fetidp_flux_rhs,VEC_CLASSID,3); 2266 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2267 ierr = PetscUseMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetRHS_C",(Mat,Vec,Vec),(fetidp_mat,standard_rhs,fetidp_flux_rhs));CHKERRQ(ierr); 2268 PetscFunctionReturn(0); 2269 } 2270 2271 #undef __FUNCT__ 2272 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution_BDDC" 2273 static PetscErrorCode PCBDDCMatFETIDPGetSolution_BDDC(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 2274 { 2275 FETIDPMat_ctx mat_ctx; 2276 PC_IS* pcis; 2277 PC_BDDC* pcbddc; 2278 PetscErrorCode ierr; 2279 2280 PetscFunctionBegin; 2281 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2282 pcis = (PC_IS*)mat_ctx->pc->data; 2283 pcbddc = (PC_BDDC*)mat_ctx->pc->data; 2284 2285 /* apply B_delta^T */ 2286 ierr = VecScatterBegin(mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2287 ierr = VecScatterEnd(mat_ctx->l2g_lambda,fetidp_flux_sol,mat_ctx->lambda_local,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2288 ierr = MatMultTranspose(mat_ctx->B_delta,mat_ctx->lambda_local,pcis->vec1_B);CHKERRQ(ierr); 2289 /* compute rhs for BDDC application */ 2290 ierr = VecAYPX(pcis->vec1_B,-1.0,mat_ctx->temp_solution_B);CHKERRQ(ierr); 2291 if (pcbddc->switch_static) { 2292 ierr = VecCopy(mat_ctx->temp_solution_D,pcis->vec1_D);CHKERRQ(ierr); 2293 } 2294 ierr = PetscMemzero(pcbddc->benign_p0,pcbddc->benign_n*sizeof(PetscScalar));CHKERRQ(ierr); 2295 /* apply BDDC */ 2296 ierr = PCBDDCApplyInterfacePreconditioner(mat_ctx->pc,PETSC_FALSE);CHKERRQ(ierr); 2297 /* put values into standard global vector */ 2298 ierr = VecScatterBegin(pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2299 ierr = VecScatterEnd(pcis->global_to_B,pcis->vec1_B,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2300 if (!pcbddc->switch_static) { 2301 /* compute values into the interior if solved for the partially subassembled Schur complement */ 2302 ierr = MatMult(pcis->A_IB,pcis->vec1_B,pcis->vec1_D);CHKERRQ(ierr); 2303 ierr = VecAYPX(pcis->vec1_D,-1.0,mat_ctx->temp_solution_D);CHKERRQ(ierr); 2304 ierr = KSPSolve(pcbddc->ksp_D,pcis->vec1_D,pcis->vec1_D);CHKERRQ(ierr); 2305 } 2306 ierr = VecScatterBegin(pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2307 ierr = VecScatterEnd(pcis->global_to_D,pcis->vec1_D,standard_sol,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr); 2308 /* add p0 solution to final solution */ 2309 ierr = PCBDDCBenignGetOrSetP0(mat_ctx->pc,standard_sol,PETSC_FALSE);CHKERRQ(ierr); 2310 if (pcbddc->ChangeOfBasisMatrix) { 2311 Vec v2; 2312 ierr = VecDuplicate(standard_sol,&v2);CHKERRQ(ierr); 2313 ierr = MatMult(pcbddc->ChangeOfBasisMatrix,standard_sol,v2);CHKERRQ(ierr); 2314 ierr = VecCopy(v2,standard_sol);CHKERRQ(ierr); 2315 ierr = VecDestroy(&v2);CHKERRQ(ierr); 2316 } 2317 ierr = PCPostSolve_BDDC(mat_ctx->pc,NULL,NULL,standard_sol);CHKERRQ(ierr); 2318 PetscFunctionReturn(0); 2319 } 2320 2321 #undef __FUNCT__ 2322 #define __FUNCT__ "PCBDDCMatFETIDPGetSolution" 2323 /*@ 2324 PCBDDCMatFETIDPGetSolution - Compute the physical solution using the solution of the FETI-DP linear system 2325 2326 Collective 2327 2328 Input Parameters: 2329 + fetidp_mat - the FETI-DP matrix obtained by a call to PCBDDCCreateFETIDPOperators 2330 - fetidp_flux_sol - the solution of the FETI-DP linear system 2331 2332 Output Parameters: 2333 . standard_sol - the solution defined on the physical domain 2334 2335 Level: developer 2336 2337 Notes: 2338 2339 .seealso: PCBDDC, PCBDDCCreateFETIDPOperators, PCBDDCMatFETIDPGetRHS 2340 @*/ 2341 PetscErrorCode PCBDDCMatFETIDPGetSolution(Mat fetidp_mat, Vec fetidp_flux_sol, Vec standard_sol) 2342 { 2343 FETIDPMat_ctx mat_ctx; 2344 PetscErrorCode ierr; 2345 2346 PetscFunctionBegin; 2347 PetscValidHeaderSpecific(fetidp_mat,MAT_CLASSID,1); 2348 PetscValidHeaderSpecific(fetidp_flux_sol,VEC_CLASSID,2); 2349 PetscValidHeaderSpecific(standard_sol,VEC_CLASSID,3); 2350 ierr = MatShellGetContext(fetidp_mat,&mat_ctx);CHKERRQ(ierr); 2351 ierr = PetscUseMethod(mat_ctx->pc,"PCBDDCMatFETIDPGetSolution_C",(Mat,Vec,Vec),(fetidp_mat,fetidp_flux_sol,standard_sol));CHKERRQ(ierr); 2352 PetscFunctionReturn(0); 2353 } 2354 2355 extern PetscErrorCode FETIDPMatMult(Mat,Vec,Vec); 2356 extern PetscErrorCode FETIDPMatMultTranspose(Mat,Vec,Vec); 2357 extern PetscErrorCode PCBDDCDestroyFETIDPMat(Mat); 2358 extern PetscErrorCode FETIDPPCApply(PC,Vec,Vec); 2359 extern PetscErrorCode FETIDPPCApplyTranspose(PC,Vec,Vec); 2360 extern PetscErrorCode PCBDDCDestroyFETIDPPC(PC); 2361 2362 #undef __FUNCT__ 2363 #define __FUNCT__ "PCBDDCCreateFETIDPOperators_BDDC" 2364 static PetscErrorCode PCBDDCCreateFETIDPOperators_BDDC(PC pc, PetscBool fully_redundant, Mat *fetidp_mat, PC *fetidp_pc) 2365 { 2366 2367 FETIDPMat_ctx fetidpmat_ctx; 2368 Mat newmat; 2369 FETIDPPC_ctx fetidppc_ctx; 2370 PC newpc; 2371 MPI_Comm comm; 2372 PetscErrorCode ierr; 2373 2374 PetscFunctionBegin; 2375 ierr = PetscObjectGetComm((PetscObject)pc,&comm);CHKERRQ(ierr); 2376 /* FETIDP linear matrix */ 2377 ierr = PCBDDCCreateFETIDPMatContext(pc,&fetidpmat_ctx);CHKERRQ(ierr); 2378 fetidpmat_ctx->fully_redundant = fully_redundant; 2379 ierr = PCBDDCSetupFETIDPMatContext(fetidpmat_ctx);CHKERRQ(ierr); 2380 ierr = MatCreateShell(comm,PETSC_DECIDE,PETSC_DECIDE,fetidpmat_ctx->n_lambda,fetidpmat_ctx->n_lambda,fetidpmat_ctx,&newmat);CHKERRQ(ierr); 2381 ierr = MatShellSetOperation(newmat,MATOP_MULT,(void (*)(void))FETIDPMatMult);CHKERRQ(ierr); 2382 ierr = MatShellSetOperation(newmat,MATOP_MULT_TRANSPOSE,(void (*)(void))FETIDPMatMultTranspose);CHKERRQ(ierr); 2383 ierr = MatShellSetOperation(newmat,MATOP_DESTROY,(void (*)(void))PCBDDCDestroyFETIDPMat);CHKERRQ(ierr); 2384 ierr = MatSetUp(newmat);CHKERRQ(ierr); 2385 /* FETIDP preconditioner */ 2386 ierr = PCBDDCCreateFETIDPPCContext(pc,&fetidppc_ctx);CHKERRQ(ierr); 2387 ierr = PCBDDCSetupFETIDPPCContext(newmat,fetidppc_ctx);CHKERRQ(ierr); 2388 ierr = PCCreate(comm,&newpc);CHKERRQ(ierr); 2389 ierr = PCSetType(newpc,PCSHELL);CHKERRQ(ierr); 2390 ierr = PCShellSetContext(newpc,fetidppc_ctx);CHKERRQ(ierr); 2391 ierr = PCShellSetApply(newpc,FETIDPPCApply);CHKERRQ(ierr); 2392 ierr = PCShellSetApplyTranspose(newpc,FETIDPPCApplyTranspose);CHKERRQ(ierr); 2393 ierr = PCShellSetDestroy(newpc,PCBDDCDestroyFETIDPPC);CHKERRQ(ierr); 2394 ierr = PCSetOperators(newpc,newmat,newmat);CHKERRQ(ierr); 2395 ierr = PCSetUp(newpc);CHKERRQ(ierr); 2396 /* return pointers for objects created */ 2397 *fetidp_mat=newmat; 2398 *fetidp_pc=newpc; 2399 PetscFunctionReturn(0); 2400 } 2401 2402 #undef __FUNCT__ 2403 #define __FUNCT__ "PCBDDCCreateFETIDPOperators" 2404 /*@ 2405 PCBDDCCreateFETIDPOperators - Create FETI-DP operators 2406 2407 Collective 2408 2409 Input Parameters: 2410 + pc - the BDDC preconditioning context (setup should have been called before) 2411 - fully_redundant - true for a fully redundant set of Lagrange multipliers 2412 2413 Output Parameters: 2414 + fetidp_mat - shell FETI-DP matrix object 2415 - fetidp_pc - shell Dirichlet preconditioner for FETI-DP matrix 2416 2417 Level: developer 2418 2419 Notes: 2420 Currently the only operations provided for FETI-DP matrix are MatMult and MatMultTranspose 2421 2422 .seealso: PCBDDC, PCBDDCMatFETIDPGetRHS, PCBDDCMatFETIDPGetSolution 2423 @*/ 2424 PetscErrorCode PCBDDCCreateFETIDPOperators(PC pc, PetscBool fully_redundant, Mat *fetidp_mat, PC *fetidp_pc) 2425 { 2426 PetscErrorCode ierr; 2427 2428 PetscFunctionBegin; 2429 PetscValidHeaderSpecific(pc,PC_CLASSID,1); 2430 if (pc->setupcalled) { 2431 ierr = PetscUseMethod(pc,"PCBDDCCreateFETIDPOperators_C",(PC,PetscBool,Mat*,PC*),(pc,fully_redundant,fetidp_mat,fetidp_pc));CHKERRQ(ierr); 2432 } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"You must call PCSetup_BDDC() first \n"); 2433 PetscFunctionReturn(0); 2434 } 2435 /* -------------------------------------------------------------------------- */ 2436 /*MC 2437 PCBDDC - Balancing Domain Decomposition by Constraints. 2438 2439 An implementation of the BDDC preconditioner based on 2440 2441 .vb 2442 [1] C. R. Dohrmann. "An approximate BDDC preconditioner", Numerical Linear Algebra with Applications Volume 14, Issue 2, pages 149-168, March 2007 2443 [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 2444 [3] J. Mandel, B. Sousedik, C. R. Dohrmann. "Multispace and Multilevel BDDC", http://arxiv.org/abs/0712.3977 2445 [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 2446 .ve 2447 2448 The matrix to be preconditioned (Pmat) must be of type MATIS. 2449 2450 Currently works with MATIS matrices with local matrices of type MATSEQAIJ, MATSEQBAIJ or MATSEQSBAIJ, either with real or complex numbers. 2451 2452 It also works with unsymmetric and indefinite problems. 2453 2454 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. 2455 2456 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). 2457 2458 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() 2459 Additional information on dofs can be provided by using PCBDDCSetDofsSplitting(), PCBDDCSetDirichletBoundaries(), PCBDDCSetNeumannBoundaries(), and PCBDDCSetPrimalVerticesIS() and their local counterparts. 2460 2461 Constraints can be customized by attaching a MatNullSpace object to the MATIS matrix via MatSetNearNullSpace(). Non-singular modes are retained via SVD. 2462 2463 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. 2464 User defined change of basis can be passed to PCBDDC by using PCBDDCSetChangeOfBasisMat() 2465 2466 The PETSc implementation also supports multilevel BDDC [3]. Coarse grids are partitioned using a MatPartitioning object. 2467 2468 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. 2469 2470 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. 2471 Deluxe scaling is not supported yet for FETI-DP. 2472 2473 Options Database Keys (some of them, run with -h for a complete list): 2474 2475 . -pc_bddc_use_vertices <true> - use or not vertices in primal space 2476 . -pc_bddc_use_edges <true> - use or not edges in primal space 2477 . -pc_bddc_use_faces <false> - use or not faces in primal space 2478 . -pc_bddc_symmetric <true> - symmetric computation of primal basis functions. Specify false for unsymmetric problems 2479 . -pc_bddc_use_change_of_basis <false> - use change of basis approach (on edges only) 2480 . -pc_bddc_use_change_on_faces <false> - use change of basis approach on faces if change of basis has been requested 2481 . -pc_bddc_switch_static <false> - switches from M_2 (default) to M_3 operator (see reference article [1]) 2482 . -pc_bddc_levels <0> - maximum number of levels for multilevel 2483 . -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) 2484 . -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) 2485 . -pc_bddc_use_deluxe_scaling <false> - use deluxe scaling 2486 . -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) 2487 . -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) 2488 - -pc_bddc_check_level <0> - set verbosity level of debugging output 2489 2490 Options for Dirichlet, Neumann or coarse solver can be set with 2491 .vb 2492 -pc_bddc_dirichlet_ 2493 -pc_bddc_neumann_ 2494 -pc_bddc_coarse_ 2495 .ve 2496 e.g -pc_bddc_dirichlet_ksp_type richardson -pc_bddc_dirichlet_pc_type gamg. PCBDDC uses by default KPSPREONLY and PCLU. 2497 2498 When using a multilevel approach, solvers' options at the N-th level (N > 1) can be specified as 2499 .vb 2500 -pc_bddc_dirichlet_lN_ 2501 -pc_bddc_neumann_lN_ 2502 -pc_bddc_coarse_lN_ 2503 .ve 2504 Note that level number ranges from the finest (0) to the coarsest (N). 2505 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. 2506 .vb 2507 -pc_bddc_coarse_pc_bddc_adaptive_threshold 5 -pc_bddc_coarse_l1_pc_bddc_redistribute 3 2508 .ve 2509 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 2510 2511 Level: intermediate 2512 2513 Developer notes: 2514 2515 Contributed by Stefano Zampini 2516 2517 .seealso: PCCreate(), PCSetType(), PCType (for list of available types), PC, MATIS 2518 M*/ 2519 2520 #undef __FUNCT__ 2521 #define __FUNCT__ "PCCreate_BDDC" 2522 PETSC_EXTERN PetscErrorCode PCCreate_BDDC(PC pc) 2523 { 2524 PetscErrorCode ierr; 2525 PC_BDDC *pcbddc; 2526 2527 PetscFunctionBegin; 2528 /* Creates the private data structure for this preconditioner and attach it to the PC object. */ 2529 ierr = PetscNewLog(pc,&pcbddc);CHKERRQ(ierr); 2530 pc->data = (void*)pcbddc; 2531 2532 /* create PCIS data structure */ 2533 ierr = PCISCreate(pc);CHKERRQ(ierr); 2534 2535 /* BDDC customization */ 2536 pcbddc->use_local_adj = PETSC_TRUE; 2537 pcbddc->use_vertices = PETSC_TRUE; 2538 pcbddc->use_edges = PETSC_TRUE; 2539 pcbddc->use_faces = PETSC_FALSE; 2540 pcbddc->use_change_of_basis = PETSC_FALSE; 2541 pcbddc->use_change_on_faces = PETSC_FALSE; 2542 pcbddc->switch_static = PETSC_FALSE; 2543 pcbddc->use_nnsp_true = PETSC_FALSE; 2544 pcbddc->use_qr_single = PETSC_FALSE; 2545 pcbddc->symmetric_primal = PETSC_TRUE; 2546 pcbddc->benign_saddle_point = PETSC_FALSE; 2547 pcbddc->benign_have_null = PETSC_FALSE; 2548 pcbddc->vertex_size = 1; 2549 pcbddc->dbg_flag = 0; 2550 /* private */ 2551 pcbddc->local_primal_size = 0; 2552 pcbddc->local_primal_size_cc = 0; 2553 pcbddc->local_primal_ref_node = 0; 2554 pcbddc->local_primal_ref_mult = 0; 2555 pcbddc->n_vertices = 0; 2556 pcbddc->primal_indices_local_idxs = 0; 2557 pcbddc->recompute_topography = PETSC_TRUE; 2558 pcbddc->coarse_size = -1; 2559 pcbddc->new_primal_space = PETSC_FALSE; 2560 pcbddc->new_primal_space_local = PETSC_FALSE; 2561 pcbddc->global_primal_indices = 0; 2562 pcbddc->onearnullspace = 0; 2563 pcbddc->onearnullvecs_state = 0; 2564 pcbddc->user_primal_vertices = 0; 2565 pcbddc->user_primal_vertices_local = 0; 2566 pcbddc->temp_solution = 0; 2567 pcbddc->original_rhs = 0; 2568 pcbddc->local_mat = 0; 2569 pcbddc->ChangeOfBasisMatrix = 0; 2570 pcbddc->user_ChangeOfBasisMatrix = 0; 2571 pcbddc->coarse_vec = 0; 2572 pcbddc->coarse_ksp = 0; 2573 pcbddc->coarse_phi_B = 0; 2574 pcbddc->coarse_phi_D = 0; 2575 pcbddc->coarse_psi_B = 0; 2576 pcbddc->coarse_psi_D = 0; 2577 pcbddc->vec1_P = 0; 2578 pcbddc->vec1_R = 0; 2579 pcbddc->vec2_R = 0; 2580 pcbddc->local_auxmat1 = 0; 2581 pcbddc->local_auxmat2 = 0; 2582 pcbddc->R_to_B = 0; 2583 pcbddc->R_to_D = 0; 2584 pcbddc->ksp_D = 0; 2585 pcbddc->ksp_R = 0; 2586 pcbddc->NeumannBoundaries = 0; 2587 pcbddc->NeumannBoundariesLocal = 0; 2588 pcbddc->DirichletBoundaries = 0; 2589 pcbddc->DirichletBoundariesLocal = 0; 2590 pcbddc->user_provided_isfordofs = PETSC_FALSE; 2591 pcbddc->n_ISForDofs = 0; 2592 pcbddc->n_ISForDofsLocal = 0; 2593 pcbddc->ISForDofs = 0; 2594 pcbddc->ISForDofsLocal = 0; 2595 pcbddc->ConstraintMatrix = 0; 2596 pcbddc->use_exact_dirichlet_trick = PETSC_TRUE; 2597 pcbddc->exact_dirichlet_trick_app = PETSC_FALSE; 2598 pcbddc->coarse_loc_to_glob = 0; 2599 pcbddc->coarsening_ratio = 8; 2600 pcbddc->coarse_adj_red = 0; 2601 pcbddc->current_level = 0; 2602 pcbddc->max_levels = 0; 2603 pcbddc->use_coarse_estimates = PETSC_FALSE; 2604 pcbddc->coarse_eqs_per_proc = 1; 2605 pcbddc->coarse_subassembling = 0; 2606 pcbddc->detect_disconnected = PETSC_FALSE; 2607 pcbddc->n_local_subs = 0; 2608 pcbddc->local_subs = NULL; 2609 2610 /* benign subspace trick */ 2611 pcbddc->benign_change = 0; 2612 pcbddc->benign_compute_correction = PETSC_TRUE; 2613 pcbddc->benign_vec = 0; 2614 pcbddc->benign_original_mat = 0; 2615 pcbddc->benign_sf = 0; 2616 pcbddc->benign_B0 = 0; 2617 pcbddc->benign_n = 0; 2618 pcbddc->benign_p0 = NULL; 2619 pcbddc->benign_p0_lidx = NULL; 2620 pcbddc->benign_p0_gidx = NULL; 2621 pcbddc->benign_null = PETSC_FALSE; 2622 2623 /* Nedelec */ 2624 pcbddc->nedfield = -1; 2625 pcbddc->nedglobal = PETSC_TRUE; 2626 2627 /* create local graph structure */ 2628 ierr = PCBDDCGraphCreate(&pcbddc->mat_graph);CHKERRQ(ierr); 2629 pcbddc->graphmaxcount = PETSC_MAX_INT; 2630 2631 /* scaling */ 2632 pcbddc->work_scaling = 0; 2633 pcbddc->use_deluxe_scaling = PETSC_FALSE; 2634 2635 /* sub schurs options */ 2636 pcbddc->sub_schurs_rebuild = PETSC_FALSE; 2637 pcbddc->sub_schurs_layers = -1; 2638 pcbddc->sub_schurs_use_useradj = PETSC_FALSE; 2639 2640 pcbddc->computed_rowadj = PETSC_FALSE; 2641 2642 /* adaptivity */ 2643 pcbddc->adaptive_threshold = 0.0; 2644 pcbddc->adaptive_nmax = 0; 2645 pcbddc->adaptive_nmin = 0; 2646 2647 /* function pointers */ 2648 pc->ops->apply = PCApply_BDDC; 2649 pc->ops->applytranspose = PCApplyTranspose_BDDC; 2650 pc->ops->setup = PCSetUp_BDDC; 2651 pc->ops->destroy = PCDestroy_BDDC; 2652 pc->ops->setfromoptions = PCSetFromOptions_BDDC; 2653 pc->ops->view = PCView_BDDC; 2654 pc->ops->applyrichardson = 0; 2655 pc->ops->applysymmetricleft = 0; 2656 pc->ops->applysymmetricright = 0; 2657 pc->ops->presolve = PCPreSolve_BDDC; 2658 pc->ops->postsolve = PCPostSolve_BDDC; 2659 2660 /* composing function */ 2661 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDiscreteGradient_C",PCBDDCSetDiscreteGradient_BDDC);CHKERRQ(ierr); 2662 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDivergenceMat_C",PCBDDCSetDivergenceMat_BDDC);CHKERRQ(ierr); 2663 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetChangeOfBasisMat_C",PCBDDCSetChangeOfBasisMat_BDDC);CHKERRQ(ierr); 2664 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesLocalIS_C",PCBDDCSetPrimalVerticesLocalIS_BDDC);CHKERRQ(ierr); 2665 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetPrimalVerticesIS_C",PCBDDCSetPrimalVerticesIS_BDDC);CHKERRQ(ierr); 2666 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetCoarseningRatio_C",PCBDDCSetCoarseningRatio_BDDC);CHKERRQ(ierr); 2667 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevel_C",PCBDDCSetLevel_BDDC);CHKERRQ(ierr); 2668 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetUseExactDirichlet_C",PCBDDCSetUseExactDirichlet_BDDC);CHKERRQ(ierr); 2669 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLevels_C",PCBDDCSetLevels_BDDC);CHKERRQ(ierr); 2670 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundaries_C",PCBDDCSetDirichletBoundaries_BDDC);CHKERRQ(ierr); 2671 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDirichletBoundariesLocal_C",PCBDDCSetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 2672 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundaries_C",PCBDDCSetNeumannBoundaries_BDDC);CHKERRQ(ierr); 2673 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetNeumannBoundariesLocal_C",PCBDDCSetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 2674 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundaries_C",PCBDDCGetDirichletBoundaries_BDDC);CHKERRQ(ierr); 2675 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetDirichletBoundariesLocal_C",PCBDDCGetDirichletBoundariesLocal_BDDC);CHKERRQ(ierr); 2676 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundaries_C",PCBDDCGetNeumannBoundaries_BDDC);CHKERRQ(ierr); 2677 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCGetNeumannBoundariesLocal_C",PCBDDCGetNeumannBoundariesLocal_BDDC);CHKERRQ(ierr); 2678 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplitting_C",PCBDDCSetDofsSplitting_BDDC);CHKERRQ(ierr); 2679 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetDofsSplittingLocal_C",PCBDDCSetDofsSplittingLocal_BDDC);CHKERRQ(ierr); 2680 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCSetLocalAdjacencyGraph_C",PCBDDCSetLocalAdjacencyGraph_BDDC);CHKERRQ(ierr); 2681 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCCreateFETIDPOperators_C",PCBDDCCreateFETIDPOperators_BDDC);CHKERRQ(ierr); 2682 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetRHS_C",PCBDDCMatFETIDPGetRHS_BDDC);CHKERRQ(ierr); 2683 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCBDDCMatFETIDPGetSolution_C",PCBDDCMatFETIDPGetSolution_BDDC);CHKERRQ(ierr); 2684 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCPreSolveChangeRHS_C",PCPreSolveChangeRHS_BDDC);CHKERRQ(ierr); 2685 PetscFunctionReturn(0); 2686 } 2687 2688