1 2 #include <../src/ksp/pc/impls/factor/factor.h> /*I "petscpc.h" I*/ 3 4 /* ------------------------------------------------------------------------------------------*/ 5 6 7 #undef __FUNCT__ 8 #define __FUNCT__ "PCFactorSetUpMatSolverPackage_Factor" 9 PetscErrorCode PCFactorSetUpMatSolverPackage_Factor(PC pc) 10 { 11 PC_Factor *icc = (PC_Factor*)pc->data; 12 PetscErrorCode ierr; 13 14 PetscFunctionBegin; 15 if (!pc->setupcalled && !((PC_Factor*)icc)->fact) { 16 ierr = MatGetFactor(pc->pmat,((PC_Factor*)icc)->solvertype,((PC_Factor*)icc)->factortype,&((PC_Factor*)icc)->fact);CHKERRQ(ierr); 17 } 18 PetscFunctionReturn(0); 19 } 20 21 #undef __FUNCT__ 22 #define __FUNCT__ "PCFactorSetZeroPivot_Factor" 23 PetscErrorCode PCFactorSetZeroPivot_Factor(PC pc,PetscReal z) 24 { 25 PC_Factor *ilu = (PC_Factor*)pc->data; 26 27 PetscFunctionBegin; 28 ilu->info.zeropivot = z; 29 PetscFunctionReturn(0); 30 } 31 32 #undef __FUNCT__ 33 #define __FUNCT__ "PCFactorSetShiftType_Factor" 34 PetscErrorCode PCFactorSetShiftType_Factor(PC pc,MatFactorShiftType shifttype) 35 { 36 PC_Factor *dir = (PC_Factor*)pc->data; 37 38 PetscFunctionBegin; 39 if (shifttype == (MatFactorShiftType)PETSC_DECIDE) dir->info.shifttype = (PetscReal) MAT_SHIFT_NONE; 40 else { 41 dir->info.shifttype = (PetscReal) shifttype; 42 if ((shifttype == MAT_SHIFT_NONZERO || shifttype == MAT_SHIFT_INBLOCKS) && dir->info.shiftamount == 0.0) { 43 dir->info.shiftamount = 100.0*PETSC_MACHINE_EPSILON; /* set default amount if user has not called PCFactorSetShiftAmount() yet */ 44 } 45 } 46 PetscFunctionReturn(0); 47 } 48 49 #undef __FUNCT__ 50 #define __FUNCT__ "PCFactorSetShiftAmount_Factor" 51 PetscErrorCode PCFactorSetShiftAmount_Factor(PC pc,PetscReal shiftamount) 52 { 53 PC_Factor *dir = (PC_Factor*)pc->data; 54 55 PetscFunctionBegin; 56 if (shiftamount == (PetscReal) PETSC_DECIDE) dir->info.shiftamount = 100.0*PETSC_MACHINE_EPSILON; 57 else dir->info.shiftamount = shiftamount; 58 PetscFunctionReturn(0); 59 } 60 61 #undef __FUNCT__ 62 #define __FUNCT__ "PCFactorSetDropTolerance_Factor" 63 PetscErrorCode PCFactorSetDropTolerance_Factor(PC pc,PetscReal dt,PetscReal dtcol,PetscInt dtcount) 64 { 65 PC_Factor *ilu = (PC_Factor*)pc->data; 66 67 PetscFunctionBegin; 68 if (pc->setupcalled && (!ilu->info.usedt || ((PC_Factor*)ilu)->info.dt != dt || ((PC_Factor*)ilu)->info.dtcol != dtcol || ((PC_Factor*)ilu)->info.dtcount != dtcount)) { 69 SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONGSTATE,"Cannot change tolerance after use"); 70 } 71 ilu->info.usedt = PETSC_TRUE; 72 ilu->info.dt = dt; 73 ilu->info.dtcol = dtcol; 74 ilu->info.dtcount = dtcount; 75 ilu->info.fill = PETSC_DEFAULT; 76 PetscFunctionReturn(0); 77 } 78 79 #undef __FUNCT__ 80 #define __FUNCT__ "PCFactorSetFill_Factor" 81 PetscErrorCode PCFactorSetFill_Factor(PC pc,PetscReal fill) 82 { 83 PC_Factor *dir = (PC_Factor*)pc->data; 84 85 PetscFunctionBegin; 86 dir->info.fill = fill; 87 PetscFunctionReturn(0); 88 } 89 90 #undef __FUNCT__ 91 #define __FUNCT__ "PCFactorSetMatOrderingType_Factor" 92 PetscErrorCode PCFactorSetMatOrderingType_Factor(PC pc,MatOrderingType ordering) 93 { 94 PC_Factor *dir = (PC_Factor*)pc->data; 95 PetscErrorCode ierr; 96 PetscBool flg; 97 98 PetscFunctionBegin; 99 if (!pc->setupcalled) { 100 ierr = PetscFree(dir->ordering);CHKERRQ(ierr); 101 ierr = PetscStrallocpy(ordering,(char**)&dir->ordering);CHKERRQ(ierr); 102 } else { 103 ierr = PetscStrcmp(dir->ordering,ordering,&flg);CHKERRQ(ierr); 104 if (!flg) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONGSTATE,"Cannot change ordering after use"); 105 } 106 PetscFunctionReturn(0); 107 } 108 109 #undef __FUNCT__ 110 #define __FUNCT__ "PCFactorGetLevels_Factor" 111 PetscErrorCode PCFactorGetLevels_Factor(PC pc,PetscInt *levels) 112 { 113 PC_Factor *ilu = (PC_Factor*)pc->data; 114 115 PetscFunctionBegin; 116 *levels = ilu->info.levels; 117 PetscFunctionReturn(0); 118 } 119 120 #undef __FUNCT__ 121 #define __FUNCT__ "PCFactorSetLevels_Factor" 122 PetscErrorCode PCFactorSetLevels_Factor(PC pc,PetscInt levels) 123 { 124 PC_Factor *ilu = (PC_Factor*)pc->data; 125 PetscErrorCode ierr; 126 127 PetscFunctionBegin; 128 if (!pc->setupcalled) ilu->info.levels = levels; 129 else if (ilu->info.levels != levels) { 130 ierr = (*pc->ops->reset)(pc);CHKERRQ(ierr); /* remove previous factored matrices */ 131 pc->setupcalled = 0; /* force a complete rebuild of preconditioner factored matrices */ 132 ilu->info.levels = levels; 133 } else if (ilu->info.usedt) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONGSTATE,"Cannot change levels after use with ILUdt"); 134 PetscFunctionReturn(0); 135 } 136 137 #undef __FUNCT__ 138 #define __FUNCT__ "PCFactorSetAllowDiagonalFill_Factor" 139 PetscErrorCode PCFactorSetAllowDiagonalFill_Factor(PC pc,PetscBool flg) 140 { 141 PC_Factor *dir = (PC_Factor*)pc->data; 142 143 PetscFunctionBegin; 144 dir->info.diagonal_fill = (PetscReal) flg; 145 PetscFunctionReturn(0); 146 } 147 148 #undef __FUNCT__ 149 #define __FUNCT__ "PCFactorGetAllowDiagonalFill_Factor" 150 PetscErrorCode PCFactorGetAllowDiagonalFill_Factor(PC pc,PetscBool *flg) 151 { 152 PC_Factor *dir = (PC_Factor*)pc->data; 153 154 PetscFunctionBegin; 155 *flg = dir->info.diagonal_fill ? PETSC_TRUE : PETSC_FALSE; 156 PetscFunctionReturn(0); 157 } 158 159 /* ------------------------------------------------------------------------------------------*/ 160 161 #undef __FUNCT__ 162 #define __FUNCT__ "PCFactorSetPivotInBlocks_Factor" 163 PetscErrorCode PCFactorSetPivotInBlocks_Factor(PC pc,PetscBool pivot) 164 { 165 PC_Factor *dir = (PC_Factor*)pc->data; 166 167 PetscFunctionBegin; 168 dir->info.pivotinblocks = pivot ? 1.0 : 0.0; 169 PetscFunctionReturn(0); 170 } 171 172 #undef __FUNCT__ 173 #define __FUNCT__ "PCFactorGetMatrix_Factor" 174 PetscErrorCode PCFactorGetMatrix_Factor(PC pc,Mat *mat) 175 { 176 PC_Factor *ilu = (PC_Factor*)pc->data; 177 178 PetscFunctionBegin; 179 if (!ilu->fact) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ORDER,"Matrix not yet factored; call after KSPSetUp() or PCSetUp()"); 180 *mat = ilu->fact; 181 PetscFunctionReturn(0); 182 } 183 184 #undef __FUNCT__ 185 #define __FUNCT__ "PCFactorSetMatSolverPackage_Factor" 186 PetscErrorCode PCFactorSetMatSolverPackage_Factor(PC pc,const MatSolverPackage stype) 187 { 188 PetscErrorCode ierr; 189 PC_Factor *lu = (PC_Factor*)pc->data; 190 191 PetscFunctionBegin; 192 if (lu->fact) { 193 const MatSolverPackage ltype; 194 PetscBool flg; 195 ierr = MatFactorGetSolverPackage(lu->fact,<ype);CHKERRQ(ierr); 196 ierr = PetscStrcmp(stype,ltype,&flg);CHKERRQ(ierr); 197 if (!flg) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONGSTATE,"Cannot change solver matrix package after PC has been setup or used"); 198 } else { 199 ierr = PetscFree(lu->solvertype);CHKERRQ(ierr); 200 ierr = PetscStrallocpy(stype,&lu->solvertype);CHKERRQ(ierr); 201 } 202 PetscFunctionReturn(0); 203 } 204 205 #undef __FUNCT__ 206 #define __FUNCT__ "PCFactorGetMatSolverPackage_Factor" 207 PetscErrorCode PCFactorGetMatSolverPackage_Factor(PC pc,const MatSolverPackage *stype) 208 { 209 PC_Factor *lu = (PC_Factor*)pc->data; 210 211 PetscFunctionBegin; 212 *stype = lu->solvertype; 213 PetscFunctionReturn(0); 214 } 215 216 #undef __FUNCT__ 217 #define __FUNCT__ "PCFactorSetColumnPivot_Factor" 218 PetscErrorCode PCFactorSetColumnPivot_Factor(PC pc,PetscReal dtcol) 219 { 220 PC_Factor *dir = (PC_Factor*)pc->data; 221 222 PetscFunctionBegin; 223 if (dtcol < 0.0 || dtcol > 1.0) SETERRQ1(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_OUTOFRANGE,"Column pivot tolerance is %g must be between 0 and 1",(double)dtcol); 224 dir->info.dtcol = dtcol; 225 PetscFunctionReturn(0); 226 } 227 228 #undef __FUNCT__ 229 #define __FUNCT__ "PCSetFromOptions_Factor" 230 PetscErrorCode PCSetFromOptions_Factor(PC pc) 231 { 232 PC_Factor *factor = (PC_Factor*)pc->data; 233 PetscErrorCode ierr; 234 PetscBool flg,set; 235 char tname[256], solvertype[64]; 236 PetscFunctionList ordlist; 237 PetscEnum etmp; 238 PetscBool inplace; 239 240 PetscFunctionBegin; 241 if (!MatOrderingRegisterAllCalled) {ierr = MatOrderingRegisterAll();CHKERRQ(ierr);} 242 ierr = PCFactorGetUseInPlace(pc,&inplace);CHKERRQ(ierr); 243 ierr = PetscOptionsBool("-pc_factor_in_place","Form factored matrix in the same memory as the matrix","PCFactorSetUseInPlace",inplace,&flg,&set);CHKERRQ(ierr); 244 if (set) { 245 ierr = PCFactorSetUseInPlace(pc,flg);CHKERRQ(ierr); 246 } 247 ierr = PetscOptionsReal("-pc_factor_fill","Expected non-zeros in factored matrix","PCFactorSetFill",((PC_Factor*)factor)->info.fill,&((PC_Factor*)factor)->info.fill,NULL);CHKERRQ(ierr); 248 249 ierr = PetscOptionsEnum("-pc_factor_shift_type","Type of shift to add to diagonal","PCFactorSetShiftType",MatFactorShiftTypes,(PetscEnum)(int)((PC_Factor*)factor)->info.shifttype,&etmp,&flg);CHKERRQ(ierr); 250 if (flg) { 251 ierr = PCFactorSetShiftType(pc,(MatFactorShiftType)etmp);CHKERRQ(ierr); 252 } 253 ierr = PetscOptionsReal("-pc_factor_shift_amount","Shift added to diagonal","PCFactorSetShiftAmount",((PC_Factor*)factor)->info.shiftamount,&((PC_Factor*)factor)->info.shiftamount,0);CHKERRQ(ierr); 254 255 ierr = PetscOptionsReal("-pc_factor_zeropivot","Pivot is considered zero if less than","PCFactorSetZeroPivot",((PC_Factor*)factor)->info.zeropivot,&((PC_Factor*)factor)->info.zeropivot,0);CHKERRQ(ierr); 256 ierr = PetscOptionsReal("-pc_factor_column_pivot","Column pivot tolerance (used only for some factorization)","PCFactorSetColumnPivot",((PC_Factor*)factor)->info.dtcol,&((PC_Factor*)factor)->info.dtcol,&flg);CHKERRQ(ierr); 257 258 ierr = PetscOptionsBool("-pc_factor_pivot_in_blocks","Pivot inside matrix dense blocks for BAIJ and SBAIJ","PCFactorSetPivotInBlocks",((PC_Factor*)factor)->info.pivotinblocks ? PETSC_TRUE : PETSC_FALSE,&flg,&set);CHKERRQ(ierr); 259 if (set) { 260 ierr = PCFactorSetPivotInBlocks(pc,flg);CHKERRQ(ierr); 261 } 262 263 ierr = PetscOptionsBool("-pc_factor_reuse_fill","Use fill from previous factorization","PCFactorSetReuseFill",PETSC_FALSE,&flg,&set);CHKERRQ(ierr); 264 if (set) { 265 ierr = PCFactorSetReuseFill(pc,flg);CHKERRQ(ierr); 266 } 267 ierr = PetscOptionsBool("-pc_factor_reuse_ordering","Reuse ordering from previous factorization","PCFactorSetReuseOrdering",PETSC_FALSE,&flg,&set);CHKERRQ(ierr); 268 if (set) { 269 ierr = PCFactorSetReuseOrdering(pc,flg);CHKERRQ(ierr); 270 } 271 272 ierr = MatGetOrderingList(&ordlist);CHKERRQ(ierr); 273 ierr = PetscOptionsFList("-pc_factor_mat_ordering_type","Reordering to reduce nonzeros in factored matrix","PCFactorSetMatOrderingType",ordlist,((PC_Factor*)factor)->ordering,tname,256,&flg);CHKERRQ(ierr); 274 if (flg) { 275 ierr = PCFactorSetMatOrderingType(pc,tname);CHKERRQ(ierr); 276 } 277 278 /* maybe should have MatGetSolverTypes(Mat,&list) like the ordering list */ 279 ierr = PetscOptionsString("-pc_factor_mat_solver_package","Specific direct solver to use","MatGetFactor",((PC_Factor*)factor)->solvertype,solvertype,64,&flg);CHKERRQ(ierr); 280 if (flg) { 281 ierr = PCFactorSetMatSolverPackage(pc,solvertype);CHKERRQ(ierr); 282 } 283 PetscFunctionReturn(0); 284 } 285 286 #undef __FUNCT__ 287 #define __FUNCT__ "PCView_Factor" 288 PetscErrorCode PCView_Factor(PC pc,PetscViewer viewer) 289 { 290 PC_Factor *factor = (PC_Factor*)pc->data; 291 PetscErrorCode ierr; 292 PetscBool isstring,iascii; 293 294 PetscFunctionBegin; 295 ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERSTRING,&isstring);CHKERRQ(ierr); 296 ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&iascii);CHKERRQ(ierr); 297 if (iascii) { 298 if (factor->factortype == MAT_FACTOR_ILU || factor->factortype == MAT_FACTOR_ICC) { 299 if (factor->info.dt > 0) { 300 ierr = PetscViewerASCIIPrintf(viewer," drop tolerance %g\n",(double)factor->info.dt);CHKERRQ(ierr); 301 ierr = PetscViewerASCIIPrintf(viewer," max nonzeros per row %D\n",factor->info.dtcount);CHKERRQ(ierr); 302 ierr = PetscViewerASCIIPrintf(viewer," column permutation tolerance %g\n",(double)factor->info.dtcol);CHKERRQ(ierr); 303 } else if (factor->info.levels == 1) { 304 ierr = PetscViewerASCIIPrintf(viewer," %D level of fill\n",(PetscInt)factor->info.levels);CHKERRQ(ierr); 305 } else { 306 ierr = PetscViewerASCIIPrintf(viewer," %D levels of fill\n",(PetscInt)factor->info.levels);CHKERRQ(ierr); 307 } 308 } 309 310 ierr = PetscViewerASCIIPrintf(viewer," tolerance for zero pivot %g\n",(double)factor->info.zeropivot);CHKERRQ(ierr); 311 if (MatFactorShiftTypesDetail[(int)factor->info.shifttype]) { /* Only print when using a nontrivial shift */ 312 ierr = PetscViewerASCIIPrintf(viewer," using %s [%s]\n",MatFactorShiftTypesDetail[(int)factor->info.shifttype],MatFactorShiftTypes[(int)factor->info.shifttype]);CHKERRQ(ierr); 313 } 314 315 ierr = PetscViewerASCIIPrintf(viewer," matrix ordering: %s\n",factor->ordering);CHKERRQ(ierr); 316 317 if (factor->fact) { 318 MatInfo info; 319 ierr = MatGetInfo(factor->fact,MAT_LOCAL,&info);CHKERRQ(ierr); 320 ierr = PetscViewerASCIIPrintf(viewer," factor fill ratio given %g, needed %g\n",(double)info.fill_ratio_given,(double)info.fill_ratio_needed);CHKERRQ(ierr); 321 ierr = PetscViewerASCIIPrintf(viewer," Factored matrix follows:\n");CHKERRQ(ierr); 322 ierr = PetscViewerASCIIPushTab(viewer);CHKERRQ(ierr); 323 ierr = PetscViewerASCIIPushTab(viewer);CHKERRQ(ierr); 324 ierr = PetscViewerASCIIPushTab(viewer);CHKERRQ(ierr); 325 ierr = PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO);CHKERRQ(ierr); 326 ierr = MatView(factor->fact,viewer);CHKERRQ(ierr); 327 ierr = PetscViewerPopFormat(viewer);CHKERRQ(ierr); 328 ierr = PetscViewerASCIIPopTab(viewer);CHKERRQ(ierr); 329 ierr = PetscViewerASCIIPopTab(viewer);CHKERRQ(ierr); 330 ierr = PetscViewerASCIIPopTab(viewer);CHKERRQ(ierr); 331 } 332 333 } else if (isstring) { 334 MatFactorType t; 335 ierr = MatGetFactorType(factor->fact,&t);CHKERRQ(ierr); 336 if (t == MAT_FACTOR_ILU || t == MAT_FACTOR_ICC) { 337 ierr = PetscViewerStringSPrintf(viewer," lvls=%D,order=%s",(PetscInt)factor->info.levels,factor->ordering);CHKERRQ(ierr);CHKERRQ(ierr); 338 } 339 } 340 PetscFunctionReturn(0); 341 } 342