1 #define PETSCKSP_DLL 2 3 /* 4 Defines a ILU factorization preconditioner for any Mat implementation 5 */ 6 #include "../src/ksp/pc/impls/factor/ilu/ilu.h" /*I "petscpc.h" I*/ 7 8 /* ------------------------------------------------------------------------------------------*/ 9 EXTERN_C_BEGIN 10 #undef __FUNCT__ 11 #define __FUNCT__ "PCFactorSetReuseFill_ILU" 12 PetscErrorCode PETSCKSP_DLLEXPORT PCFactorSetReuseFill_ILU(PC pc,PetscTruth flag) 13 { 14 PC_ILU *lu = (PC_ILU*)pc->data; 15 16 PetscFunctionBegin; 17 lu->reusefill = flag; 18 PetscFunctionReturn(0); 19 } 20 EXTERN_C_END 21 22 EXTERN_C_BEGIN 23 #undef __FUNCT__ 24 #define __FUNCT__ "PCFactorReorderForNonzeroDiagonal_ILU" 25 PetscErrorCode PETSCKSP_DLLEXPORT PCFactorReorderForNonzeroDiagonal_ILU(PC pc,PetscReal z) 26 { 27 PC_ILU *ilu = (PC_ILU*)pc->data; 28 29 PetscFunctionBegin; 30 ilu->nonzerosalongdiagonal = PETSC_TRUE; 31 if (z == PETSC_DECIDE) { 32 ilu->nonzerosalongdiagonaltol = 1.e-10; 33 } else { 34 ilu->nonzerosalongdiagonaltol = z; 35 } 36 PetscFunctionReturn(0); 37 } 38 EXTERN_C_END 39 40 #undef __FUNCT__ 41 #define __FUNCT__ "PCDestroy_ILU_Internal" 42 PetscErrorCode PCDestroy_ILU_Internal(PC pc) 43 { 44 PC_ILU *ilu = (PC_ILU*)pc->data; 45 PetscErrorCode ierr; 46 47 PetscFunctionBegin; 48 if (!ilu->inplace && ((PC_Factor*)ilu)->fact) {ierr = MatDestroy(((PC_Factor*)ilu)->fact);CHKERRQ(ierr);} 49 if (ilu->row && ilu->col && ilu->row != ilu->col) {ierr = ISDestroy(ilu->row);CHKERRQ(ierr);} 50 if (ilu->col) {ierr = ISDestroy(ilu->col);CHKERRQ(ierr);} 51 PetscFunctionReturn(0); 52 } 53 54 EXTERN_C_BEGIN 55 #undef __FUNCT__ 56 #define __FUNCT__ "PCFactorSetUseDropTolerance_ILU" 57 PetscErrorCode PETSCKSP_DLLEXPORT PCFactorSetUseDropTolerance_ILU(PC pc,PetscReal dt,PetscReal dtcol,PetscInt dtcount) 58 { 59 PC_ILU *ilu = (PC_ILU*)pc->data; 60 PetscErrorCode ierr; 61 62 PetscFunctionBegin; 63 if (pc->setupcalled && (!ilu->usedt || ((PC_Factor*)ilu)->info.dt != dt || ((PC_Factor*)ilu)->info.dtcol != dtcol || ((PC_Factor*)ilu)->info.dtcount != dtcount)) { 64 pc->setupcalled = 0; 65 ierr = PCDestroy_ILU_Internal(pc);CHKERRQ(ierr); 66 } 67 ilu->usedt = PETSC_TRUE; 68 ((PC_Factor*)ilu)->info.dt = dt; 69 ((PC_Factor*)ilu)->info.dtcol = dtcol; 70 ((PC_Factor*)ilu)->info.dtcount = dtcount; 71 ((PC_Factor*)ilu)->info.fill = PETSC_DEFAULT; 72 PetscFunctionReturn(0); 73 } 74 EXTERN_C_END 75 76 EXTERN_C_BEGIN 77 #undef __FUNCT__ 78 #define __FUNCT__ "PCFactorSetReuseOrdering_ILU" 79 PetscErrorCode PETSCKSP_DLLEXPORT PCFactorSetReuseOrdering_ILU(PC pc,PetscTruth flag) 80 { 81 PC_ILU *ilu = (PC_ILU*)pc->data; 82 83 PetscFunctionBegin; 84 ilu->reuseordering = flag; 85 PetscFunctionReturn(0); 86 } 87 EXTERN_C_END 88 89 EXTERN_C_BEGIN 90 #undef __FUNCT__ 91 #define __FUNCT__ "PCFactorSetUseInPlace_ILU" 92 PetscErrorCode PETSCKSP_DLLEXPORT PCFactorSetUseInPlace_ILU(PC pc) 93 { 94 PC_ILU *dir = (PC_ILU*)pc->data; 95 96 PetscFunctionBegin; 97 dir->inplace = PETSC_TRUE; 98 PetscFunctionReturn(0); 99 } 100 EXTERN_C_END 101 102 #undef __FUNCT__ 103 #define __FUNCT__ "PCSetFromOptions_ILU" 104 static PetscErrorCode PCSetFromOptions_ILU(PC pc) 105 { 106 PetscErrorCode ierr; 107 PetscInt dtmax = 3,itmp; 108 PetscTruth flg; 109 PetscReal dt[3]; 110 PC_ILU *ilu = (PC_ILU*)pc->data; 111 PetscReal tol; 112 113 PetscFunctionBegin; 114 ierr = PetscOptionsHead("ILU Options");CHKERRQ(ierr); 115 ierr = PCSetFromOptions_Factor(pc);CHKERRQ(ierr); 116 117 ierr = PetscOptionsInt("-pc_factor_levels","levels of fill","PCFactorSetLevels",(PetscInt)((PC_Factor*)ilu)->info.levels,&itmp,&flg);CHKERRQ(ierr); 118 if (flg) ((PC_Factor*)ilu)->info.levels = itmp; 119 flg = PETSC_FALSE; 120 ierr = PetscOptionsTruth("-pc_factor_diagonal_fill","Allow fill into empty diagonal entry","PCFactorSetAllowDiagonalFill",flg,&flg,PETSC_NULL);CHKERRQ(ierr); 121 ((PC_Factor*)ilu)->info.diagonal_fill = (double) flg; 122 123 dt[0] = ((PC_Factor*)ilu)->info.dt; 124 dt[1] = ((PC_Factor*)ilu)->info.dtcol; 125 dt[2] = ((PC_Factor*)ilu)->info.dtcount; 126 ierr = PetscOptionsRealArray("-pc_factor_use_drop_tolerance","<dt,dtcol,maxrowcount>","PCFactorSetUseDropTolerance",dt,&dtmax,&flg);CHKERRQ(ierr); 127 if (flg) { 128 ierr = PCFactorSetUseDropTolerance(pc,dt[0],dt[1],(PetscInt)dt[2]);CHKERRQ(ierr); 129 } 130 131 ierr = PetscOptionsName("-pc_factor_nonzeros_along_diagonal","Reorder to remove zeros from diagonal","PCFactorReorderForNonzeroDiagonal",&flg);CHKERRQ(ierr); 132 if (flg) { 133 tol = PETSC_DECIDE; 134 ierr = PetscOptionsReal("-pc_factor_nonzeros_along_diagonal","Reorder to remove zeros from diagonal","PCFactorReorderForNonzeroDiagonal",ilu->nonzerosalongdiagonaltol,&tol,0);CHKERRQ(ierr); 135 ierr = PCFactorReorderForNonzeroDiagonal(pc,tol);CHKERRQ(ierr); 136 } 137 138 ierr = PetscOptionsTail();CHKERRQ(ierr); 139 PetscFunctionReturn(0); 140 } 141 142 #undef __FUNCT__ 143 #define __FUNCT__ "PCView_ILU" 144 static PetscErrorCode PCView_ILU(PC pc,PetscViewer viewer) 145 { 146 PC_ILU *ilu = (PC_ILU*)pc->data; 147 PetscErrorCode ierr; 148 PetscTruth isstring,iascii; 149 150 PetscFunctionBegin; 151 ierr = PetscTypeCompare((PetscObject)viewer,PETSC_VIEWER_STRING,&isstring);CHKERRQ(ierr); 152 ierr = PetscTypeCompare((PetscObject)viewer,PETSC_VIEWER_ASCII,&iascii);CHKERRQ(ierr); 153 if (iascii) { 154 if (ilu->usedt) { 155 ierr = PetscViewerASCIIPrintf(viewer," ILU: drop tolerance %G\n",((PC_Factor*)ilu)->info.dt);CHKERRQ(ierr); 156 ierr = PetscViewerASCIIPrintf(viewer," ILU: max nonzeros per row %D\n",(PetscInt)((PC_Factor*)ilu)->info.dtcount);CHKERRQ(ierr); 157 ierr = PetscViewerASCIIPrintf(viewer," ILU: column permutation tolerance %G\n",((PC_Factor*)ilu)->info.dtcol);CHKERRQ(ierr); 158 } else if (((PC_Factor*)ilu)->info.levels == 1) { 159 ierr = PetscViewerASCIIPrintf(viewer," ILU: %D level of fill\n",(PetscInt)((PC_Factor*)ilu)->info.levels);CHKERRQ(ierr); 160 } else { 161 ierr = PetscViewerASCIIPrintf(viewer," ILU: %D levels of fill\n",(PetscInt)((PC_Factor*)ilu)->info.levels);CHKERRQ(ierr); 162 } 163 ierr = PetscViewerASCIIPrintf(viewer," ILU: factor fill ratio allocated %G\n",((PC_Factor*)ilu)->info.fill);CHKERRQ(ierr); 164 ierr = PetscViewerASCIIPrintf(viewer," ILU: tolerance for zero pivot %G\n",((PC_Factor*)ilu)->info.zeropivot);CHKERRQ(ierr); 165 if (((PC_Factor*)ilu)->info.shiftpd) {ierr = PetscViewerASCIIPrintf(viewer," ILU: using Manteuffel shift\n");CHKERRQ(ierr);} 166 if (((PC_Factor*)ilu)->info.shiftnz) {ierr = PetscViewerASCIIPrintf(viewer," ILU: using diagonal shift to prevent zero pivot\n");CHKERRQ(ierr);} 167 if (((PC_Factor*)ilu)->info.shiftinblocks) {ierr = PetscViewerASCIIPrintf(viewer," ILU: using diagonal shift on blocks to prevent zero pivot\n");CHKERRQ(ierr);} 168 if (ilu->inplace) {ierr = PetscViewerASCIIPrintf(viewer," in-place factorization\n");CHKERRQ(ierr);} 169 else {ierr = PetscViewerASCIIPrintf(viewer," out-of-place factorization\n");CHKERRQ(ierr);} 170 ierr = PetscViewerASCIIPrintf(viewer," matrix ordering: %s\n",((PC_Factor*)ilu)->ordering);CHKERRQ(ierr); 171 if (ilu->reusefill) {ierr = PetscViewerASCIIPrintf(viewer," Reusing fill from past factorization\n");CHKERRQ(ierr);} 172 if (ilu->reuseordering) {ierr = PetscViewerASCIIPrintf(viewer," Reusing reordering from past factorization\n");CHKERRQ(ierr);} 173 if (((PC_Factor*)ilu)->fact) { 174 ierr = PetscViewerASCIIPrintf(viewer," ILU: factor fill ratio needed %G\n",ilu->actualfill);CHKERRQ(ierr); 175 ierr = PetscViewerASCIIPrintf(viewer," Factored matrix follows\n");CHKERRQ(ierr); 176 ierr = PetscViewerASCIIPushTab(viewer);CHKERRQ(ierr); 177 ierr = PetscViewerASCIIPushTab(viewer);CHKERRQ(ierr); 178 ierr = PetscViewerASCIIPushTab(viewer);CHKERRQ(ierr); 179 ierr = PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO);CHKERRQ(ierr); 180 ierr = MatView(((PC_Factor*)ilu)->fact,viewer);CHKERRQ(ierr); 181 ierr = PetscViewerPopFormat(viewer);CHKERRQ(ierr); 182 ierr = PetscViewerASCIIPopTab(viewer);CHKERRQ(ierr); 183 ierr = PetscViewerASCIIPopTab(viewer);CHKERRQ(ierr); 184 ierr = PetscViewerASCIIPopTab(viewer);CHKERRQ(ierr); 185 } 186 } else if (isstring) { 187 ierr = PetscViewerStringSPrintf(viewer," lvls=%D,order=%s",(PetscInt)((PC_Factor*)ilu)->info.levels,((PC_Factor*)ilu)->ordering);CHKERRQ(ierr);CHKERRQ(ierr); 188 } else { 189 SETERRQ1(PETSC_ERR_SUP,"Viewer type %s not supported for PCILU",((PetscObject)viewer)->type_name); 190 } 191 PetscFunctionReturn(0); 192 } 193 194 #undef __FUNCT__ 195 #define __FUNCT__ "PCSetUp_ILU" 196 static PetscErrorCode PCSetUp_ILU(PC pc) 197 { 198 PetscErrorCode ierr; 199 PC_ILU *ilu = (PC_ILU*)pc->data; 200 MatInfo info; 201 202 PetscFunctionBegin; 203 if (ilu->inplace) { 204 CHKMEMQ; 205 if (!pc->setupcalled) { 206 207 /* In-place factorization only makes sense with the natural ordering, 208 so we only need to get the ordering once, even if nonzero structure changes */ 209 ierr = MatGetOrdering(pc->pmat,((PC_Factor*)ilu)->ordering,&ilu->row,&ilu->col);CHKERRQ(ierr); 210 if (ilu->row) {ierr = PetscLogObjectParent(pc,ilu->row);CHKERRQ(ierr);} 211 if (ilu->col) {ierr = PetscLogObjectParent(pc,ilu->col);CHKERRQ(ierr);} 212 } 213 214 /* In place ILU only makes sense with fill factor of 1.0 because 215 cannot have levels of fill */ 216 ((PC_Factor*)ilu)->info.fill = 1.0; 217 ((PC_Factor*)ilu)->info.diagonal_fill = 0.0; 218 ierr = MatILUFactor(pc->pmat,ilu->row,ilu->col,&((PC_Factor*)ilu)->info);CHKERRQ(ierr);CHKMEMQ; 219 ((PC_Factor*)ilu)->fact = pc->pmat; 220 } else { 221 if (!pc->setupcalled) { 222 /* first time in so compute reordering and symbolic factorization */ 223 ierr = MatGetOrdering(pc->pmat,((PC_Factor*)ilu)->ordering,&ilu->row,&ilu->col);CHKERRQ(ierr); 224 if (ilu->row) {ierr = PetscLogObjectParent(pc,ilu->row);CHKERRQ(ierr);} 225 if (ilu->col) {ierr = PetscLogObjectParent(pc,ilu->col);CHKERRQ(ierr);} 226 /* Remove zeros along diagonal? */ 227 if (ilu->nonzerosalongdiagonal) { 228 ierr = MatReorderForNonzeroDiagonal(pc->pmat,ilu->nonzerosalongdiagonaltol,ilu->row,ilu->col);CHKERRQ(ierr); 229 } 230 CHKMEMQ; 231 ierr = MatGetFactor(pc->pmat,((PC_Factor*)ilu)->solvertype,MAT_FACTOR_ILU,&((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 232 CHKMEMQ; 233 ierr = MatILUFactorSymbolic(((PC_Factor*)ilu)->fact,pc->pmat,ilu->row,ilu->col,&((PC_Factor*)ilu)->info);CHKERRQ(ierr); 234 ierr = MatGetInfo(((PC_Factor*)ilu)->fact,MAT_LOCAL,&info);CHKERRQ(ierr); 235 ilu->actualfill = info.fill_ratio_needed; 236 ierr = PetscLogObjectParent(pc,((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 237 } else if (pc->flag != SAME_NONZERO_PATTERN) { 238 if (!ilu->reuseordering) { 239 /* compute a new ordering for the ILU */ 240 ierr = ISDestroy(ilu->row);CHKERRQ(ierr); 241 ierr = ISDestroy(ilu->col);CHKERRQ(ierr); 242 ierr = MatGetOrdering(pc->pmat,((PC_Factor*)ilu)->ordering,&ilu->row,&ilu->col);CHKERRQ(ierr); 243 if (ilu->row) {ierr = PetscLogObjectParent(pc,ilu->row);CHKERRQ(ierr);} 244 if (ilu->col) {ierr = PetscLogObjectParent(pc,ilu->col);CHKERRQ(ierr);} 245 /* Remove zeros along diagonal? */ 246 if (ilu->nonzerosalongdiagonal) { 247 ierr = MatReorderForNonzeroDiagonal(pc->pmat,ilu->nonzerosalongdiagonaltol,ilu->row,ilu->col);CHKERRQ(ierr); 248 } 249 } 250 ierr = MatDestroy(((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 251 ierr = MatGetFactor(pc->pmat,MAT_SOLVER_PETSC,MAT_FACTOR_ILU,&((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 252 ierr = MatILUFactorSymbolic(((PC_Factor*)ilu)->fact,pc->pmat,ilu->row,ilu->col,&((PC_Factor*)ilu)->info);CHKERRQ(ierr); 253 ierr = MatGetInfo(((PC_Factor*)ilu)->fact,MAT_LOCAL,&info);CHKERRQ(ierr); 254 ilu->actualfill = info.fill_ratio_needed; 255 ierr = PetscLogObjectParent(pc,((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 256 } 257 CHKMEMQ; 258 ierr = MatLUFactorNumeric(((PC_Factor*)ilu)->fact,pc->pmat,&((PC_Factor*)ilu)->info);CHKERRQ(ierr); 259 CHKMEMQ; 260 } 261 PetscFunctionReturn(0); 262 } 263 264 #undef __FUNCT__ 265 #define __FUNCT__ "PCDestroy_ILU" 266 static PetscErrorCode PCDestroy_ILU(PC pc) 267 { 268 PC_ILU *ilu = (PC_ILU*)pc->data; 269 PetscErrorCode ierr; 270 271 PetscFunctionBegin; 272 ierr = PCDestroy_ILU_Internal(pc);CHKERRQ(ierr); 273 ierr = PetscStrfree(((PC_Factor*)ilu)->solvertype);CHKERRQ(ierr); 274 ierr = PetscStrfree(((PC_Factor*)ilu)->ordering);CHKERRQ(ierr); 275 ierr = PetscFree(ilu);CHKERRQ(ierr); 276 PetscFunctionReturn(0); 277 } 278 279 #undef __FUNCT__ 280 #define __FUNCT__ "PCApply_ILU" 281 static PetscErrorCode PCApply_ILU(PC pc,Vec x,Vec y) 282 { 283 PC_ILU *ilu = (PC_ILU*)pc->data; 284 PetscErrorCode ierr; 285 286 PetscFunctionBegin; 287 ierr = MatSolve(((PC_Factor*)ilu)->fact,x,y);CHKERRQ(ierr); 288 PetscFunctionReturn(0); 289 } 290 291 #undef __FUNCT__ 292 #define __FUNCT__ "PCApplyTranspose_ILU" 293 static PetscErrorCode PCApplyTranspose_ILU(PC pc,Vec x,Vec y) 294 { 295 PC_ILU *ilu = (PC_ILU*)pc->data; 296 PetscErrorCode ierr; 297 298 PetscFunctionBegin; 299 ierr = MatSolveTranspose(((PC_Factor*)ilu)->fact,x,y);CHKERRQ(ierr); 300 PetscFunctionReturn(0); 301 } 302 303 /*MC 304 PCILU - Incomplete factorization preconditioners. 305 306 Options Database Keys: 307 + -pc_factor_levels <k> - number of levels of fill for ILU(k) 308 . -pc_factor_in_place - only for ILU(0) with natural ordering, reuses the space of the matrix for 309 its factorization (overwrites original matrix) 310 . -pc_factor_diagonal_fill - fill in a zero diagonal even if levels of fill indicate it wouldn't be fill 311 . -pc_factor_reuse_ordering - reuse ordering of factorized matrix from previous factorization 312 . -pc_factor_use_drop_tolerance <dt,dtcol,maxrowcount> - use Saad's drop tolerance ILUdt 313 . -pc_factor_fill <nfill> - expected amount of fill in factored matrix compared to original matrix, nfill > 1 314 . -pc_factor_nonzeros_along_diagonal - reorder the matrix before factorization to remove zeros from the diagonal, 315 this decreases the chance of getting a zero pivot 316 . -pc_factor_mat_ordering_type <natural,nd,1wd,rcm,qmd> - set the row/column ordering of the factored matrix 317 . -pc_factor_pivot_in_blocks - for block ILU(k) factorization, i.e. with BAIJ matrices with block size larger 318 than 1 the diagonal blocks are factored with partial pivoting (this increases the 319 stability of the ILU factorization 320 . -pc_factor_shift_in_blocks - adds a small diagonal to any block if it is singular during ILU factorization 321 . -pc_factor_shift_nonzero <shift> - Sets shift amount or PETSC_DECIDE for the default 322 - -pc_factor_shift_positive_definite true or false - Activate/Deactivate PCFactorSetShiftPd(); the value 323 is optional with true being the default 324 325 Level: beginner 326 327 Concepts: incomplete factorization 328 329 Notes: Only implemented for some matrix formats. (for parallel see PCHYPRE for hypre's ILU) 330 331 For BAIJ matrices this implements a point block ILU 332 333 References: 334 T. Dupont, R. Kendall, and H. Rachford. An approximate factorization procedure for solving 335 self-adjoint elliptic difference equations. SIAM J. Numer. Anal., 5:559--573, 1968. 336 337 T.A. Oliphant. An implicit numerical method for solving two-dimensional time-dependent dif- 338 fusion problems. Quart. Appl. Math., 19:221--229, 1961. 339 340 Review article: APPROXIMATE AND INCOMPLETE FACTORIZATIONS, TONY F. CHAN AND HENK A. VAN DER VORST 341 http://igitur-archive.library.uu.nl/math/2001-0621-115821/proc.pdf chapter in Parallel Numerical 342 Algorithms, edited by D. Keyes, A. Semah, V. Venkatakrishnan, ICASE/LaRC Interdisciplinary Series in 343 Science and Engineering, Kluwer, pp. 167--202. 344 345 346 .seealso: PCCreate(), PCSetType(), PCType (for list of available types), PC, PCSOR, MatOrderingType, 347 PCFactorSetZeroPivot(), PCFactorSetShiftNonzero(), PCFactorSetShiftPd(), PCFactorSetShiftInBlocks(), 348 PCFactorSetUseDropTolerance(),PCFactorSetFill(), PCFactorSetMatOrderingType(), PCFactorSetReuseOrdering(), 349 PCFactorSetLevels(), PCFactorSetUseInPlace(), PCFactorSetAllowDiagonalFill(), PCFactorSetPivotInBlocks() 350 351 M*/ 352 353 EXTERN_C_BEGIN 354 #undef __FUNCT__ 355 #define __FUNCT__ "PCCreate_ILU" 356 PetscErrorCode PETSCKSP_DLLEXPORT PCCreate_ILU(PC pc) 357 { 358 PetscErrorCode ierr; 359 PC_ILU *ilu; 360 361 PetscFunctionBegin; 362 ierr = PetscNewLog(pc,PC_ILU,&ilu);CHKERRQ(ierr); 363 364 ((PC_Factor*)ilu)->fact = 0; 365 ierr = MatFactorInfoInitialize(&((PC_Factor*)ilu)->info);CHKERRQ(ierr); 366 ((PC_Factor*)ilu)->info.levels = 0.; 367 ((PC_Factor*)ilu)->info.fill = 1.0; 368 ilu->col = 0; 369 ilu->row = 0; 370 ilu->inplace = PETSC_FALSE; 371 ierr = PetscStrallocpy(MAT_SOLVER_PETSC,&((PC_Factor*)ilu)->solvertype);CHKERRQ(ierr); 372 ierr = PetscStrallocpy(MATORDERING_NATURAL,&((PC_Factor*)ilu)->ordering);CHKERRQ(ierr); 373 ilu->reuseordering = PETSC_FALSE; 374 ilu->usedt = PETSC_FALSE; 375 ((PC_Factor*)ilu)->info.dt = PETSC_DEFAULT; 376 ((PC_Factor*)ilu)->info.dtcount = PETSC_DEFAULT; 377 ((PC_Factor*)ilu)->info.dtcol = PETSC_DEFAULT; 378 ((PC_Factor*)ilu)->info.shiftnz = 1.e-12; 379 ((PC_Factor*)ilu)->info.shiftpd = 0.0; /* false */ 380 ((PC_Factor*)ilu)->info.zeropivot = 1.e-12; 381 ((PC_Factor*)ilu)->info.pivotinblocks = 1.0; 382 ((PC_Factor*)ilu)->info.shiftinblocks = 1.e-12; 383 ilu->reusefill = PETSC_FALSE; 384 ((PC_Factor*)ilu)->info.diagonal_fill = 0.; 385 pc->data = (void*)ilu; 386 387 pc->ops->destroy = PCDestroy_ILU; 388 pc->ops->apply = PCApply_ILU; 389 pc->ops->applytranspose = PCApplyTranspose_ILU; 390 pc->ops->setup = PCSetUp_ILU; 391 pc->ops->setfromoptions = PCSetFromOptions_ILU; 392 pc->ops->getfactoredmatrix = PCFactorGetMatrix_Factor; 393 pc->ops->view = PCView_ILU; 394 pc->ops->applyrichardson = 0; 395 396 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetZeroPivot_C","PCFactorSetZeroPivot_Factor", 397 PCFactorSetZeroPivot_Factor);CHKERRQ(ierr); 398 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetShiftNonzero_C","PCFactorSetShiftNonzero_Factor", 399 PCFactorSetShiftNonzero_Factor);CHKERRQ(ierr); 400 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetShiftPd_C","PCFactorSetShiftPd_Factor", 401 PCFactorSetShiftPd_Factor);CHKERRQ(ierr); 402 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetShiftInBlocks_C","PCFactorSetShiftInBlocks_Factor", 403 PCFactorSetShiftInBlocks_Factor);CHKERRQ(ierr); 404 405 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorGetMatSolverPackage_C","PCFactorGetMatSolverPackage_Factor", 406 PCFactorGetMatSolverPackage_Factor);CHKERRQ(ierr); 407 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetMatSolverPackage_C","PCFactorSetMatSolverPackage_Factor", 408 PCFactorSetMatSolverPackage_Factor);CHKERRQ(ierr); 409 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetUseDropTolerance_C","PCFactorSetUseDropTolerance_ILU", 410 PCFactorSetUseDropTolerance_ILU);CHKERRQ(ierr); 411 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetFill_C","PCFactorSetFill_Factor", 412 PCFactorSetFill_Factor);CHKERRQ(ierr); 413 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetMatOrderingType_C","PCFactorSetMatOrderingType_Factor", 414 PCFactorSetMatOrderingType_Factor);CHKERRQ(ierr); 415 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetReuseOrdering_C","PCFactorSetReuseOrdering_ILU", 416 PCFactorSetReuseOrdering_ILU);CHKERRQ(ierr); 417 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetReuseFill_C","PCFactorSetReuseFill_ILU", 418 PCFactorSetReuseFill_ILU);CHKERRQ(ierr); 419 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetLevels_C","PCFactorSetLevels_Factor", 420 PCFactorSetLevels_Factor);CHKERRQ(ierr); 421 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetUseInPlace_C","PCFactorSetUseInPlace_ILU", 422 PCFactorSetUseInPlace_ILU);CHKERRQ(ierr); 423 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetAllowDiagonalFill_C","PCFactorSetAllowDiagonalFill_Factor", 424 PCFactorSetAllowDiagonalFill_Factor);CHKERRQ(ierr); 425 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorSetPivotInBlocks_C","PCFactorSetPivotInBlocks_Factor", 426 PCFactorSetPivotInBlocks_Factor);CHKERRQ(ierr); 427 ierr = PetscObjectComposeFunctionDynamic((PetscObject)pc,"PCFactorReorderForNonzeroDiagonal_C","PCFactorReorderForNonzeroDiagonal_ILU", 428 PCFactorReorderForNonzeroDiagonal_ILU);CHKERRQ(ierr); 429 PetscFunctionReturn(0); 430 } 431 EXTERN_C_END 432