1 2 /* 3 Defines a ILU factorization preconditioner for any Mat implementation 4 */ 5 #include <../src/ksp/pc/impls/factor/ilu/ilu.h> /*I "petscpc.h" I*/ 6 7 /* ------------------------------------------------------------------------------------------*/ 8 #undef __FUNCT__ 9 #define __FUNCT__ "PCFactorSetReuseFill_ILU" 10 PetscErrorCode PCFactorSetReuseFill_ILU(PC pc,PetscBool flag) 11 { 12 PC_ILU *lu = (PC_ILU*)pc->data; 13 14 PetscFunctionBegin; 15 lu->reusefill = flag; 16 PetscFunctionReturn(0); 17 } 18 19 #undef __FUNCT__ 20 #define __FUNCT__ "PCFactorReorderForNonzeroDiagonal_ILU" 21 PetscErrorCode PCFactorReorderForNonzeroDiagonal_ILU(PC pc,PetscReal z) 22 { 23 PC_ILU *ilu = (PC_ILU*)pc->data; 24 25 PetscFunctionBegin; 26 ilu->nonzerosalongdiagonal = PETSC_TRUE; 27 if (z == PETSC_DECIDE) ilu->nonzerosalongdiagonaltol = 1.e-10; 28 else ilu->nonzerosalongdiagonaltol = z; 29 PetscFunctionReturn(0); 30 } 31 32 #undef __FUNCT__ 33 #define __FUNCT__ "PCReset_ILU" 34 PetscErrorCode PCReset_ILU(PC pc) 35 { 36 PC_ILU *ilu = (PC_ILU*)pc->data; 37 PetscErrorCode ierr; 38 39 PetscFunctionBegin; 40 if (!ilu->inplace) {ierr = MatDestroy(&((PC_Factor*)ilu)->fact);CHKERRQ(ierr);} 41 if (ilu->row && ilu->col && ilu->row != ilu->col) {ierr = ISDestroy(&ilu->row);CHKERRQ(ierr);} 42 ierr = ISDestroy(&ilu->col);CHKERRQ(ierr); 43 PetscFunctionReturn(0); 44 } 45 46 #undef __FUNCT__ 47 #define __FUNCT__ "PCFactorSetDropTolerance_ILU" 48 PetscErrorCode PCFactorSetDropTolerance_ILU(PC pc,PetscReal dt,PetscReal dtcol,PetscInt dtcount) 49 { 50 PC_ILU *ilu = (PC_ILU*)pc->data; 51 52 PetscFunctionBegin; 53 if (pc->setupcalled && (((PC_Factor*)ilu)->info.dt != dt || ((PC_Factor*)ilu)->info.dtcol != dtcol || ((PC_Factor*)ilu)->info.dtcount != dtcount)) { 54 SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_SUP,"Cannot change drop tolerance after using PC"); 55 } 56 ((PC_Factor*)ilu)->info.dt = dt; 57 ((PC_Factor*)ilu)->info.dtcol = dtcol; 58 ((PC_Factor*)ilu)->info.dtcount = dtcount; 59 ((PC_Factor*)ilu)->info.usedt = 1.0; 60 PetscFunctionReturn(0); 61 } 62 63 #undef __FUNCT__ 64 #define __FUNCT__ "PCFactorSetReuseOrdering_ILU" 65 PetscErrorCode PCFactorSetReuseOrdering_ILU(PC pc,PetscBool flag) 66 { 67 PC_ILU *ilu = (PC_ILU*)pc->data; 68 69 PetscFunctionBegin; 70 ilu->reuseordering = flag; 71 PetscFunctionReturn(0); 72 } 73 74 #undef __FUNCT__ 75 #define __FUNCT__ "PCFactorSetUseInPlace_ILU" 76 PetscErrorCode PCFactorSetUseInPlace_ILU(PC pc,PetscBool flg) 77 { 78 PC_ILU *dir = (PC_ILU*)pc->data; 79 80 PetscFunctionBegin; 81 dir->inplace = flg; 82 PetscFunctionReturn(0); 83 } 84 85 #undef __FUNCT__ 86 #define __FUNCT__ "PCFactorGetUseInPlace_ILU" 87 PetscErrorCode PCFactorGetUseInPlace_ILU(PC pc,PetscBool *flg) 88 { 89 PC_ILU *dir = (PC_ILU*)pc->data; 90 91 PetscFunctionBegin; 92 *flg = dir->inplace; 93 PetscFunctionReturn(0); 94 } 95 96 #undef __FUNCT__ 97 #define __FUNCT__ "PCSetFromOptions_ILU" 98 static PetscErrorCode PCSetFromOptions_ILU(PC pc) 99 { 100 PetscErrorCode ierr; 101 PetscInt itmp; 102 PetscBool flg,set; 103 PC_ILU *ilu = (PC_ILU*)pc->data; 104 PetscReal tol; 105 106 PetscFunctionBegin; 107 ierr = PetscOptionsHead("ILU Options");CHKERRQ(ierr); 108 ierr = PCSetFromOptions_Factor(pc);CHKERRQ(ierr); 109 110 ierr = PetscOptionsInt("-pc_factor_levels","levels of fill","PCFactorSetLevels",(PetscInt)((PC_Factor*)ilu)->info.levels,&itmp,&flg);CHKERRQ(ierr); 111 if (flg) ((PC_Factor*)ilu)->info.levels = itmp; 112 113 ierr = PetscOptionsBool("-pc_factor_diagonal_fill","Allow fill into empty diagonal entry","PCFactorSetAllowDiagonalFill",((PC_Factor*)ilu)->info.diagonal_fill ? PETSC_TRUE : PETSC_FALSE,&flg,&set);CHKERRQ(ierr); 114 if (set) ((PC_Factor*)ilu)->info.diagonal_fill = (PetscReal) flg; 115 ierr = PetscOptionsName("-pc_factor_nonzeros_along_diagonal","Reorder to remove zeros from diagonal","PCFactorReorderForNonzeroDiagonal",&flg);CHKERRQ(ierr); 116 if (flg) { 117 tol = PETSC_DECIDE; 118 ierr = PetscOptionsReal("-pc_factor_nonzeros_along_diagonal","Reorder to remove zeros from diagonal","PCFactorReorderForNonzeroDiagonal",ilu->nonzerosalongdiagonaltol,&tol,0);CHKERRQ(ierr); 119 ierr = PCFactorReorderForNonzeroDiagonal(pc,tol);CHKERRQ(ierr); 120 } 121 122 ierr = PetscOptionsTail();CHKERRQ(ierr); 123 PetscFunctionReturn(0); 124 } 125 126 #undef __FUNCT__ 127 #define __FUNCT__ "PCView_ILU" 128 static PetscErrorCode PCView_ILU(PC pc,PetscViewer viewer) 129 { 130 PC_ILU *ilu = (PC_ILU*)pc->data; 131 PetscErrorCode ierr; 132 PetscBool iascii; 133 134 PetscFunctionBegin; 135 ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&iascii);CHKERRQ(ierr); 136 if (iascii) { 137 if (ilu->inplace) { 138 ierr = PetscViewerASCIIPrintf(viewer," ILU: in-place factorization\n");CHKERRQ(ierr); 139 } else { 140 ierr = PetscViewerASCIIPrintf(viewer," ILU: out-of-place factorization\n");CHKERRQ(ierr); 141 } 142 143 if (ilu->reusefill) {ierr = PetscViewerASCIIPrintf(viewer," ILU: Reusing fill from past factorization\n");CHKERRQ(ierr);} 144 if (ilu->reuseordering) {ierr = PetscViewerASCIIPrintf(viewer," ILU: Reusing reordering from past factorization\n");CHKERRQ(ierr);} 145 } 146 ierr = PCView_Factor(pc,viewer);CHKERRQ(ierr); 147 PetscFunctionReturn(0); 148 } 149 150 #undef __FUNCT__ 151 #define __FUNCT__ "PCSetUp_ILU" 152 static PetscErrorCode PCSetUp_ILU(PC pc) 153 { 154 PetscErrorCode ierr; 155 PC_ILU *ilu = (PC_ILU*)pc->data; 156 MatInfo info; 157 PetscBool flg; 158 159 PetscFunctionBegin; 160 /* ugly hack to change default, since it is not support by some matrix types */ 161 if (((PC_Factor*)ilu)->info.shifttype == (PetscReal)MAT_SHIFT_NONZERO) { 162 ierr = PetscObjectTypeCompare((PetscObject)pc->pmat,MATSEQAIJ,&flg);CHKERRQ(ierr); 163 if (!flg) { 164 ierr = PetscObjectTypeCompare((PetscObject)pc->pmat,MATMPIAIJ,&flg);CHKERRQ(ierr); 165 if (!flg) { 166 ((PC_Factor*)ilu)->info.shifttype = (PetscReal)MAT_SHIFT_INBLOCKS; 167 PetscInfo(pc,"Changing shift type from NONZERO to INBLOCKS because block matrices do not support NONZERO");CHKERRQ(ierr); 168 } 169 } 170 } 171 172 if (ilu->inplace) { 173 if (!pc->setupcalled) { 174 175 /* In-place factorization only makes sense with the natural ordering, 176 so we only need to get the ordering once, even if nonzero structure changes */ 177 ierr = MatGetOrdering(pc->pmat,((PC_Factor*)ilu)->ordering,&ilu->row,&ilu->col);CHKERRQ(ierr); 178 if (ilu->row) {ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)ilu->row);CHKERRQ(ierr);} 179 if (ilu->col) {ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)ilu->col);CHKERRQ(ierr);} 180 } 181 182 /* In place ILU only makes sense with fill factor of 1.0 because 183 cannot have levels of fill */ 184 ((PC_Factor*)ilu)->info.fill = 1.0; 185 ((PC_Factor*)ilu)->info.diagonal_fill = 0.0; 186 187 ierr = MatILUFactor(pc->pmat,ilu->row,ilu->col,&((PC_Factor*)ilu)->info);CHKERRQ(ierr);CHKERRQ(ierr); 188 ((PC_Factor*)ilu)->fact = pc->pmat; 189 /* must update the pc record of the matrix state or the PC will attempt to run PCSetUp() yet again */ 190 ierr = PetscObjectStateGet((PetscObject)pc->pmat,&pc->matstate);CHKERRQ(ierr); 191 } else { 192 if (!pc->setupcalled) { 193 /* first time in so compute reordering and symbolic factorization */ 194 ierr = MatGetOrdering(pc->pmat,((PC_Factor*)ilu)->ordering,&ilu->row,&ilu->col);CHKERRQ(ierr); 195 if (ilu->row) {ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)ilu->row);CHKERRQ(ierr);} 196 if (ilu->col) {ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)ilu->col);CHKERRQ(ierr);} 197 /* Remove zeros along diagonal? */ 198 if (ilu->nonzerosalongdiagonal) { 199 ierr = MatReorderForNonzeroDiagonal(pc->pmat,ilu->nonzerosalongdiagonaltol,ilu->row,ilu->col);CHKERRQ(ierr); 200 } 201 if (!((PC_Factor*)ilu)->fact) { 202 ierr = MatGetFactor(pc->pmat,((PC_Factor*)ilu)->solvertype,MAT_FACTOR_ILU,&((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 203 } 204 ierr = MatILUFactorSymbolic(((PC_Factor*)ilu)->fact,pc->pmat,ilu->row,ilu->col,&((PC_Factor*)ilu)->info);CHKERRQ(ierr); 205 ierr = MatGetInfo(((PC_Factor*)ilu)->fact,MAT_LOCAL,&info);CHKERRQ(ierr); 206 207 ilu->actualfill = info.fill_ratio_needed; 208 209 ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 210 } else if (pc->flag != SAME_NONZERO_PATTERN) { 211 if (!ilu->reuseordering) { 212 /* compute a new ordering for the ILU */ 213 ierr = ISDestroy(&ilu->row);CHKERRQ(ierr); 214 ierr = ISDestroy(&ilu->col);CHKERRQ(ierr); 215 ierr = MatGetOrdering(pc->pmat,((PC_Factor*)ilu)->ordering,&ilu->row,&ilu->col);CHKERRQ(ierr); 216 if (ilu->row) {ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)ilu->row);CHKERRQ(ierr);} 217 if (ilu->col) {ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)ilu->col);CHKERRQ(ierr);} 218 /* Remove zeros along diagonal? */ 219 if (ilu->nonzerosalongdiagonal) { 220 ierr = MatReorderForNonzeroDiagonal(pc->pmat,ilu->nonzerosalongdiagonaltol,ilu->row,ilu->col);CHKERRQ(ierr); 221 } 222 } 223 ierr = MatDestroy(&((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 224 ierr = MatGetFactor(pc->pmat,((PC_Factor*)ilu)->solvertype,MAT_FACTOR_ILU,&((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 225 ierr = MatILUFactorSymbolic(((PC_Factor*)ilu)->fact,pc->pmat,ilu->row,ilu->col,&((PC_Factor*)ilu)->info);CHKERRQ(ierr); 226 ierr = MatGetInfo(((PC_Factor*)ilu)->fact,MAT_LOCAL,&info);CHKERRQ(ierr); 227 228 ilu->actualfill = info.fill_ratio_needed; 229 230 ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)((PC_Factor*)ilu)->fact);CHKERRQ(ierr); 231 } 232 ierr = MatLUFactorNumeric(((PC_Factor*)ilu)->fact,pc->pmat,&((PC_Factor*)ilu)->info);CHKERRQ(ierr); 233 } 234 PetscFunctionReturn(0); 235 } 236 237 #undef __FUNCT__ 238 #define __FUNCT__ "PCDestroy_ILU" 239 static PetscErrorCode PCDestroy_ILU(PC pc) 240 { 241 PC_ILU *ilu = (PC_ILU*)pc->data; 242 PetscErrorCode ierr; 243 244 PetscFunctionBegin; 245 ierr = PCReset_ILU(pc);CHKERRQ(ierr); 246 ierr = PetscFree(((PC_Factor*)ilu)->solvertype);CHKERRQ(ierr); 247 ierr = PetscFree(((PC_Factor*)ilu)->ordering);CHKERRQ(ierr); 248 ierr = PetscFree(pc->data);CHKERRQ(ierr); 249 PetscFunctionReturn(0); 250 } 251 252 #undef __FUNCT__ 253 #define __FUNCT__ "PCApply_ILU" 254 static PetscErrorCode PCApply_ILU(PC pc,Vec x,Vec y) 255 { 256 PC_ILU *ilu = (PC_ILU*)pc->data; 257 PetscErrorCode ierr; 258 259 PetscFunctionBegin; 260 ierr = MatSolve(((PC_Factor*)ilu)->fact,x,y);CHKERRQ(ierr); 261 PetscFunctionReturn(0); 262 } 263 264 #undef __FUNCT__ 265 #define __FUNCT__ "PCApplyTranspose_ILU" 266 static PetscErrorCode PCApplyTranspose_ILU(PC pc,Vec x,Vec y) 267 { 268 PC_ILU *ilu = (PC_ILU*)pc->data; 269 PetscErrorCode ierr; 270 271 PetscFunctionBegin; 272 ierr = MatSolveTranspose(((PC_Factor*)ilu)->fact,x,y);CHKERRQ(ierr); 273 PetscFunctionReturn(0); 274 } 275 276 #undef __FUNCT__ 277 #define __FUNCT__ "PCApplySymmetricLeft_ILU" 278 static PetscErrorCode PCApplySymmetricLeft_ILU(PC pc,Vec x,Vec y) 279 { 280 PetscErrorCode ierr; 281 PC_ILU *icc = (PC_ILU*)pc->data; 282 283 PetscFunctionBegin; 284 ierr = MatForwardSolve(((PC_Factor*)icc)->fact,x,y);CHKERRQ(ierr); 285 PetscFunctionReturn(0); 286 } 287 288 #undef __FUNCT__ 289 #define __FUNCT__ "PCApplySymmetricRight_ILU" 290 static PetscErrorCode PCApplySymmetricRight_ILU(PC pc,Vec x,Vec y) 291 { 292 PetscErrorCode ierr; 293 PC_ILU *icc = (PC_ILU*)pc->data; 294 295 PetscFunctionBegin; 296 ierr = MatBackwardSolve(((PC_Factor*)icc)->fact,x,y);CHKERRQ(ierr); 297 PetscFunctionReturn(0); 298 } 299 300 /*MC 301 PCILU - Incomplete factorization preconditioners. 302 303 Options Database Keys: 304 + -pc_factor_levels <k> - number of levels of fill for ILU(k) 305 . -pc_factor_in_place - only for ILU(0) with natural ordering, reuses the space of the matrix for 306 its factorization (overwrites original matrix) 307 . -pc_factor_diagonal_fill - fill in a zero diagonal even if levels of fill indicate it wouldn't be fill 308 . -pc_factor_reuse_ordering - reuse ordering of factorized matrix from previous factorization 309 . -pc_factor_fill <nfill> - expected amount of fill in factored matrix compared to original matrix, nfill > 1 310 . -pc_factor_nonzeros_along_diagonal - reorder the matrix before factorization to remove zeros from the diagonal, 311 this decreases the chance of getting a zero pivot 312 . -pc_factor_mat_ordering_type <natural,nd,1wd,rcm,qmd> - set the row/column ordering of the factored matrix 313 . -pc_factor_pivot_in_blocks - for block ILU(k) factorization, i.e. with BAIJ matrices with block size larger 314 than 1 the diagonal blocks are factored with partial pivoting (this increases the 315 stability of the ILU factorization 316 317 Level: beginner 318 319 Concepts: incomplete factorization 320 321 Notes: Only implemented for some matrix formats. (for parallel see PCHYPRE for hypre's ILU) 322 323 For BAIJ matrices this implements a point block ILU 324 325 The "symmetric" application of this preconditioner is not actually symmetric since L is not transpose(U) 326 even when the matrix is not symmetric since the U stores the diagonals of the factorization. 327 328 If you are using MATSEQAIJCUSPARSE matrices (or MATMPIAIJCUSPARESE matrices with block Jacobi), factorization 329 is never done on the GPU). 330 331 References: 332 T. Dupont, R. Kendall, and H. Rachford. An approximate factorization procedure for solving 333 self-adjoint elliptic difference equations. SIAM J. Numer. Anal., 5:559--573, 1968. 334 335 T.A. Oliphant. An implicit numerical method for solving two-dimensional time-dependent dif- 336 fusion problems. Quart. Appl. Math., 19:221--229, 1961. 337 338 Review article: APPROXIMATE AND INCOMPLETE FACTORIZATIONS, TONY F. CHAN AND HENK A. VAN DER VORST 339 http://igitur-archive.library.uu.nl/math/2001-0621-115821/proc.pdf chapter in Parallel Numerical 340 Algorithms, edited by D. Keyes, A. Semah, V. Venkatakrishnan, ICASE/LaRC Interdisciplinary Series in 341 Science and Engineering, Kluwer, pp. 167--202. 342 343 344 .seealso: PCCreate(), PCSetType(), PCType (for list of available types), PC, PCSOR, MatOrderingType, 345 PCFactorSetZeroPivot(), PCFactorSetShiftSetType(), PCFactorSetAmount(), 346 PCFactorSetDropTolerance(),PCFactorSetFill(), PCFactorSetMatOrderingType(), PCFactorSetReuseOrdering(), 347 PCFactorSetLevels(), PCFactorSetUseInPlace(), PCFactorSetAllowDiagonalFill(), PCFactorSetPivotInBlocks(), 348 PCFactorGetAllowDiagonalFill(), PCFactorGetUseInPlace() 349 350 M*/ 351 352 #undef __FUNCT__ 353 #define __FUNCT__ "PCCreate_ILU" 354 PETSC_EXTERN PetscErrorCode PCCreate_ILU(PC pc) 355 { 356 PetscErrorCode ierr; 357 PC_ILU *ilu; 358 359 PetscFunctionBegin; 360 ierr = PetscNewLog(pc,&ilu);CHKERRQ(ierr); 361 362 ((PC_Factor*)ilu)->fact = 0; 363 ierr = MatFactorInfoInitialize(&((PC_Factor*)ilu)->info);CHKERRQ(ierr); 364 ((PC_Factor*)ilu)->factortype = MAT_FACTOR_ILU; 365 ((PC_Factor*)ilu)->info.levels = 0.; 366 ((PC_Factor*)ilu)->info.fill = 1.0; 367 ilu->col = 0; 368 ilu->row = 0; 369 ilu->inplace = PETSC_FALSE; 370 ierr = PetscStrallocpy(MATSOLVERPETSC,&((PC_Factor*)ilu)->solvertype);CHKERRQ(ierr); 371 ierr = PetscStrallocpy(MATORDERINGNATURAL,(char**)&((PC_Factor*)ilu)->ordering);CHKERRQ(ierr); 372 ilu->reuseordering = PETSC_FALSE; 373 ((PC_Factor*)ilu)->info.dt = PETSC_DEFAULT; 374 ((PC_Factor*)ilu)->info.dtcount = PETSC_DEFAULT; 375 ((PC_Factor*)ilu)->info.dtcol = PETSC_DEFAULT; 376 ((PC_Factor*)ilu)->info.shifttype = (PetscReal)MAT_SHIFT_NONE; 377 ((PC_Factor*)ilu)->info.shiftamount = 100.0*PETSC_MACHINE_EPSILON; 378 ((PC_Factor*)ilu)->info.zeropivot = 100.0*PETSC_MACHINE_EPSILON; 379 ((PC_Factor*)ilu)->info.pivotinblocks = 1.0; 380 ilu->reusefill = PETSC_FALSE; 381 ((PC_Factor*)ilu)->info.diagonal_fill = 0.0; 382 pc->data = (void*)ilu; 383 384 pc->ops->reset = PCReset_ILU; 385 pc->ops->destroy = PCDestroy_ILU; 386 pc->ops->apply = PCApply_ILU; 387 pc->ops->applytranspose = PCApplyTranspose_ILU; 388 pc->ops->setup = PCSetUp_ILU; 389 pc->ops->setfromoptions = PCSetFromOptions_ILU; 390 pc->ops->getfactoredmatrix = PCFactorGetMatrix_Factor; 391 pc->ops->view = PCView_ILU; 392 pc->ops->applysymmetricleft = PCApplySymmetricLeft_ILU; 393 pc->ops->applysymmetricright = PCApplySymmetricRight_ILU; 394 pc->ops->applyrichardson = 0; 395 396 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetZeroPivot_C",PCFactorSetZeroPivot_Factor);CHKERRQ(ierr); 397 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetShiftType_C",PCFactorSetShiftType_Factor);CHKERRQ(ierr); 398 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetShiftAmount_C",PCFactorSetShiftAmount_Factor);CHKERRQ(ierr); 399 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorGetMatSolverPackage_C",PCFactorGetMatSolverPackage_Factor);CHKERRQ(ierr); 400 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetMatSolverPackage_C",PCFactorSetMatSolverPackage_Factor);CHKERRQ(ierr); 401 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetUpMatSolverPackage_C",PCFactorSetUpMatSolverPackage_Factor);CHKERRQ(ierr); 402 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetDropTolerance_C",PCFactorSetDropTolerance_ILU);CHKERRQ(ierr); 403 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetFill_C",PCFactorSetFill_Factor);CHKERRQ(ierr); 404 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetMatOrderingType_C",PCFactorSetMatOrderingType_Factor);CHKERRQ(ierr); 405 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetReuseOrdering_C",PCFactorSetReuseOrdering_ILU);CHKERRQ(ierr); 406 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetReuseFill_C",PCFactorSetReuseFill_ILU);CHKERRQ(ierr); 407 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetLevels_C",PCFactorSetLevels_Factor);CHKERRQ(ierr); 408 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorGetLevels_C",PCFactorGetLevels_Factor);CHKERRQ(ierr); 409 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetUseInPlace_C",PCFactorSetUseInPlace_ILU);CHKERRQ(ierr); 410 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorGetUseInPlace_C",PCFactorGetUseInPlace_ILU);CHKERRQ(ierr); 411 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetAllowDiagonalFill_C",PCFactorSetAllowDiagonalFill_Factor);CHKERRQ(ierr); 412 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorGetAllowDiagonalFill_C",PCFactorGetAllowDiagonalFill_Factor);CHKERRQ(ierr); 413 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorSetPivotInBlocks_C",PCFactorSetPivotInBlocks_Factor);CHKERRQ(ierr); 414 ierr = PetscObjectComposeFunction((PetscObject)pc,"PCFactorReorderForNonzeroDiagonal_C",PCFactorReorderForNonzeroDiagonal_ILU);CHKERRQ(ierr); 415 PetscFunctionReturn(0); 416 } 417