1 /* 2 Preconditioner module. 3 */ 4 #if !defined(__PETSCPC_H) 5 #define __PETSCPC_H 6 #include "petscdm.h" 7 PETSC_EXTERN_CXX_BEGIN 8 9 extern PetscErrorCode PCInitializePackage(const char[]); 10 11 /* 12 PCList contains the list of preconditioners currently registered 13 These are added with the PCRegisterDynamic() macro 14 */ 15 extern PetscFList PCList; 16 17 /*S 18 PC - Abstract PETSc object that manages all preconditioners 19 20 Level: beginner 21 22 Concepts: preconditioners 23 24 .seealso: PCCreate(), PCSetType(), PCType (for list of available types) 25 S*/ 26 typedef struct _p_PC* PC; 27 28 /*J 29 PCType - String with the name of a PETSc preconditioner method or the creation function 30 with an optional dynamic library name, for example 31 http://www.mcs.anl.gov/petsc/lib.a:mypccreate() 32 33 Level: beginner 34 35 Notes: Click on the links below to see details on a particular solver 36 37 .seealso: PCSetType(), PC, PCCreate() 38 J*/ 39 #define PCType char* 40 #define PCNONE "none" 41 #define PCJACOBI "jacobi" 42 #define PCSOR "sor" 43 #define PCLU "lu" 44 #define PCSHELL "shell" 45 #define PCBJACOBI "bjacobi" 46 #define PCMG "mg" 47 #define PCEISENSTAT "eisenstat" 48 #define PCILU "ilu" 49 #define PCICC "icc" 50 #define PCASM "asm" 51 #define PCGASM "gasm" 52 #define PCKSP "ksp" 53 #define PCCOMPOSITE "composite" 54 #define PCREDUNDANT "redundant" 55 #define PCSPAI "spai" 56 #define PCNN "nn" 57 #define PCCHOLESKY "cholesky" 58 #define PCPBJACOBI "pbjacobi" 59 #define PCMAT "mat" 60 #define PCHYPRE "hypre" 61 #define PCPARMS "parms" 62 #define PCFIELDSPLIT "fieldsplit" 63 #define PCTFS "tfs" 64 #define PCML "ml" 65 #define PCPROMETHEUS "prometheus" 66 #define PCGALERKIN "galerkin" 67 #define PCEXOTIC "exotic" 68 #define PCHMPI "hmpi" 69 #define PCSUPPORTGRAPH "supportgraph" 70 #define PCASA "asa" 71 #define PCCP "cp" 72 #define PCBFBT "bfbt" 73 #define PCLSC "lsc" 74 #define PCPYTHON "python" 75 #define PCPFMG "pfmg" 76 #define PCSYSPFMG "syspfmg" 77 #define PCREDISTRIBUTE "redistribute" 78 #define PCSVD "svd" 79 #define PCGAMG "gamg" 80 #define PCSACUSP "sacusp" /* these four run on NVIDIA GPUs using CUSP */ 81 #define PCSACUSPPOLY "sacusppoly" 82 #define PCBICGSTABCUSP "bicgstabcusp" 83 #define PCAINVCUSP "ainvcusp" 84 #define PCBDDC "bddc" 85 86 /* Logging support */ 87 extern PetscClassId PC_CLASSID; 88 89 /*E 90 PCSide - If the preconditioner is to be applied to the left, right 91 or symmetrically around the operator. 92 93 Level: beginner 94 95 .seealso: 96 E*/ 97 typedef enum { PC_SIDE_DEFAULT=-1,PC_LEFT,PC_RIGHT,PC_SYMMETRIC} PCSide; 98 #define PC_SIDE_MAX (PC_SYMMETRIC + 1) 99 extern const char *PCSides[]; 100 101 extern PetscErrorCode PCCreate(MPI_Comm,PC*); 102 extern PetscErrorCode PCSetType(PC,const PCType); 103 extern PetscErrorCode PCSetUp(PC); 104 extern PetscErrorCode PCSetUpOnBlocks(PC); 105 extern PetscErrorCode PCApply(PC,Vec,Vec); 106 extern PetscErrorCode PCApplySymmetricLeft(PC,Vec,Vec); 107 extern PetscErrorCode PCApplySymmetricRight(PC,Vec,Vec); 108 extern PetscErrorCode PCApplyBAorAB(PC,PCSide,Vec,Vec,Vec); 109 extern PetscErrorCode PCApplyTranspose(PC,Vec,Vec); 110 extern PetscErrorCode PCApplyTransposeExists(PC,PetscBool *); 111 extern PetscErrorCode PCApplyBAorABTranspose(PC,PCSide,Vec,Vec,Vec); 112 113 /*E 114 PCRichardsonConvergedReason - reason a PCApplyRichardson method terminates 115 116 Level: advanced 117 118 Notes: this must match finclude/petscpc.h and the KSPConvergedReason values in petscksp.h 119 120 .seealso: PCApplyRichardson() 121 E*/ 122 typedef enum { 123 PCRICHARDSON_CONVERGED_RTOL = 2, 124 PCRICHARDSON_CONVERGED_ATOL = 3, 125 PCRICHARDSON_CONVERGED_ITS = 4, 126 PCRICHARDSON_DIVERGED_DTOL = -4} PCRichardsonConvergedReason; 127 128 extern PetscErrorCode PCApplyRichardson(PC,Vec,Vec,Vec,PetscReal,PetscReal,PetscReal,PetscInt,PetscBool ,PetscInt*,PCRichardsonConvergedReason*); 129 extern PetscErrorCode PCApplyRichardsonExists(PC,PetscBool *); 130 extern PetscErrorCode PCSetInitialGuessNonzero(PC,PetscBool ); 131 132 extern PetscErrorCode PCRegisterDestroy(void); 133 extern PetscErrorCode PCRegisterAll(const char[]); 134 extern PetscBool PCRegisterAllCalled; 135 136 extern PetscErrorCode PCRegister(const char[],const char[],const char[],PetscErrorCode(*)(PC)); 137 138 /*MC 139 PCRegisterDynamic - Adds a method to the preconditioner package. 140 141 Synopsis: 142 PetscErrorCode PCRegisterDynamic(const char *name_solver,const char *path,const char *name_create,PetscErrorCode (*routine_create)(PC)) 143 144 Not collective 145 146 Input Parameters: 147 + name_solver - name of a new user-defined solver 148 . path - path (either absolute or relative) the library containing this solver 149 . name_create - name of routine to create method context 150 - routine_create - routine to create method context 151 152 Notes: 153 PCRegisterDynamic() may be called multiple times to add several user-defined preconditioners. 154 155 If dynamic libraries are used, then the fourth input argument (routine_create) 156 is ignored. 157 158 Sample usage: 159 .vb 160 PCRegisterDynamic("my_solver","/home/username/my_lib/lib/libO/solaris/mylib", 161 "MySolverCreate",MySolverCreate); 162 .ve 163 164 Then, your solver can be chosen with the procedural interface via 165 $ PCSetType(pc,"my_solver") 166 or at runtime via the option 167 $ -pc_type my_solver 168 169 Level: advanced 170 171 Notes: ${PETSC_ARCH}, ${PETSC_DIR}, ${PETSC_LIB_DIR}, or ${any environmental variable} 172 occuring in pathname will be replaced with appropriate values. 173 If your function is not being put into a shared library then use PCRegister() instead 174 175 .keywords: PC, register 176 177 .seealso: PCRegisterAll(), PCRegisterDestroy() 178 M*/ 179 #if defined(PETSC_USE_DYNAMIC_LIBRARIES) 180 #define PCRegisterDynamic(a,b,c,d) PCRegister(a,b,c,0) 181 #else 182 #define PCRegisterDynamic(a,b,c,d) PCRegister(a,b,c,d) 183 #endif 184 185 extern PetscErrorCode PCReset(PC); 186 extern PetscErrorCode PCDestroy(PC*); 187 extern PetscErrorCode PCSetFromOptions(PC); 188 extern PetscErrorCode PCGetType(PC,const PCType*); 189 190 extern PetscErrorCode PCFactorGetMatrix(PC,Mat*); 191 extern PetscErrorCode PCSetModifySubMatrices(PC,PetscErrorCode(*)(PC,PetscInt,const IS[],const IS[],Mat[],void*),void*); 192 extern PetscErrorCode PCModifySubMatrices(PC,PetscInt,const IS[],const IS[],Mat[],void*); 193 194 extern PetscErrorCode PCSetOperators(PC,Mat,Mat,MatStructure); 195 extern PetscErrorCode PCGetOperators(PC,Mat*,Mat*,MatStructure*); 196 extern PetscErrorCode PCGetOperatorsSet(PC,PetscBool *,PetscBool *); 197 198 extern PetscErrorCode PCView(PC,PetscViewer); 199 200 extern PetscErrorCode PCSetOptionsPrefix(PC,const char[]); 201 extern PetscErrorCode PCAppendOptionsPrefix(PC,const char[]); 202 extern PetscErrorCode PCGetOptionsPrefix(PC,const char*[]); 203 204 extern PetscErrorCode PCComputeExplicitOperator(PC,Mat*); 205 206 /* 207 These are used to provide extra scaling of preconditioned 208 operator for time-stepping schemes like in SUNDIALS 209 */ 210 extern PetscErrorCode PCGetDiagonalScale(PC,PetscBool *); 211 extern PetscErrorCode PCDiagonalScaleLeft(PC,Vec,Vec); 212 extern PetscErrorCode PCDiagonalScaleRight(PC,Vec,Vec); 213 extern PetscErrorCode PCSetDiagonalScale(PC,Vec); 214 215 /* ------------- options specific to particular preconditioners --------- */ 216 217 extern PetscErrorCode PCJacobiSetUseRowMax(PC); 218 extern PetscErrorCode PCJacobiSetUseRowSum(PC); 219 extern PetscErrorCode PCJacobiSetUseAbs(PC); 220 extern PetscErrorCode PCSORSetSymmetric(PC,MatSORType); 221 extern PetscErrorCode PCSORSetOmega(PC,PetscReal); 222 extern PetscErrorCode PCSORSetIterations(PC,PetscInt,PetscInt); 223 224 extern PetscErrorCode PCEisenstatSetOmega(PC,PetscReal); 225 extern PetscErrorCode PCEisenstatNoDiagonalScaling(PC); 226 227 #define USE_PRECONDITIONER_MATRIX 0 228 #define USE_TRUE_MATRIX 1 229 extern PetscErrorCode PCBJacobiSetUseTrueLocal(PC); 230 extern PetscErrorCode PCBJacobiSetTotalBlocks(PC,PetscInt,const PetscInt[]); 231 extern PetscErrorCode PCBJacobiSetLocalBlocks(PC,PetscInt,const PetscInt[]); 232 233 extern PetscErrorCode PCKSPSetUseTrue(PC); 234 235 extern PetscErrorCode PCShellSetApply(PC,PetscErrorCode (*)(PC,Vec,Vec)); 236 extern PetscErrorCode PCShellSetApplyBA(PC,PetscErrorCode (*)(PC,PCSide,Vec,Vec,Vec)); 237 extern PetscErrorCode PCShellSetApplyTranspose(PC,PetscErrorCode (*)(PC,Vec,Vec)); 238 extern PetscErrorCode PCShellSetSetUp(PC,PetscErrorCode (*)(PC)); 239 extern PetscErrorCode PCShellSetApplyRichardson(PC,PetscErrorCode (*)(PC,Vec,Vec,Vec,PetscReal,PetscReal,PetscReal,PetscInt,PetscBool ,PetscInt*,PCRichardsonConvergedReason*)); 240 extern PetscErrorCode PCShellSetView(PC,PetscErrorCode (*)(PC,PetscViewer)); 241 extern PetscErrorCode PCShellSetDestroy(PC,PetscErrorCode (*)(PC)); 242 extern PetscErrorCode PCShellGetContext(PC,void**); 243 extern PetscErrorCode PCShellSetContext(PC,void*); 244 extern PetscErrorCode PCShellSetName(PC,const char[]); 245 extern PetscErrorCode PCShellGetName(PC,char*[]); 246 247 extern PetscErrorCode PCFactorSetZeroPivot(PC,PetscReal); 248 249 extern PetscErrorCode PCFactorSetShiftType(PC,MatFactorShiftType); 250 extern PetscErrorCode PCFactorSetShiftAmount(PC,PetscReal); 251 252 extern PetscErrorCode PCFactorSetMatSolverPackage(PC,const MatSolverPackage); 253 extern PetscErrorCode PCFactorGetMatSolverPackage(PC,const MatSolverPackage*); 254 extern PetscErrorCode PCFactorSetUpMatSolverPackage(PC); 255 256 extern PetscErrorCode PCFactorSetFill(PC,PetscReal); 257 extern PetscErrorCode PCFactorSetColumnPivot(PC,PetscReal); 258 extern PetscErrorCode PCFactorReorderForNonzeroDiagonal(PC,PetscReal); 259 260 extern PetscErrorCode PCFactorSetMatOrderingType(PC,const MatOrderingType); 261 extern PetscErrorCode PCFactorSetReuseOrdering(PC,PetscBool ); 262 extern PetscErrorCode PCFactorSetReuseFill(PC,PetscBool ); 263 extern PetscErrorCode PCFactorSetUseInPlace(PC); 264 extern PetscErrorCode PCFactorSetAllowDiagonalFill(PC); 265 extern PetscErrorCode PCFactorSetPivotInBlocks(PC,PetscBool ); 266 267 extern PetscErrorCode PCFactorSetLevels(PC,PetscInt); 268 extern PetscErrorCode PCFactorSetDropTolerance(PC,PetscReal,PetscReal,PetscInt); 269 270 extern PetscErrorCode PCASMSetLocalSubdomains(PC,PetscInt,IS[],IS[]); 271 extern PetscErrorCode PCASMSetTotalSubdomains(PC,PetscInt,IS[],IS[]); 272 extern PetscErrorCode PCASMSetOverlap(PC,PetscInt); 273 extern PetscErrorCode PCASMSetSortIndices(PC,PetscBool ); 274 275 /*E 276 PCASMType - Type of additive Schwarz method to use 277 278 $ PC_ASM_BASIC - symmetric version where residuals from the ghost points are used 279 $ and computed values in ghost regions are added together. Classical 280 $ standard additive Schwarz 281 $ PC_ASM_RESTRICT - residuals from ghost points are used but computed values in ghost 282 $ region are discarded. Default 283 $ PC_ASM_INTERPOLATE - residuals from ghost points are not used, computed values in ghost 284 $ region are added back in 285 $ PC_ASM_NONE - ghost point residuals are not used, computed ghost values are discarded 286 $ not very good. 287 288 Level: beginner 289 290 .seealso: PCASMSetType() 291 E*/ 292 typedef enum {PC_ASM_BASIC = 3,PC_ASM_RESTRICT = 1,PC_ASM_INTERPOLATE = 2,PC_ASM_NONE = 0} PCASMType; 293 extern const char *PCASMTypes[]; 294 295 extern PetscErrorCode PCASMSetType(PC,PCASMType); 296 extern PetscErrorCode PCASMCreateSubdomains(Mat,PetscInt,IS*[]); 297 extern PetscErrorCode PCASMDestroySubdomains(PetscInt,IS[],IS[]); 298 extern PetscErrorCode PCASMCreateSubdomains2D(PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt*,IS**,IS**); 299 extern PetscErrorCode PCASMGetLocalSubdomains(PC,PetscInt*,IS*[],IS*[]); 300 extern PetscErrorCode PCASMGetLocalSubmatrices(PC,PetscInt*,Mat*[]); 301 302 /*E 303 PCGASMType - Type of generalized additive Schwarz method to use (differs from ASM in allowing multiple processors per domain) 304 305 $ PC_GASM_BASIC - symmetric version where residuals from the ghost points are used 306 $ and computed values in ghost regions are added together. Classical 307 $ standard additive Schwarz 308 $ PC_GASM_RESTRICT - residuals from ghost points are used but computed values in ghost 309 $ region are discarded. Default 310 $ PC_GASM_INTERPOLATE - residuals from ghost points are not used, computed values in ghost 311 $ region are added back in 312 $ PC_GASM_NONE - ghost point residuals are not used, computed ghost values are discarded 313 $ not very good. 314 315 Level: beginner 316 317 .seealso: PCGASMSetType() 318 E*/ 319 typedef enum {PC_GASM_BASIC = 3,PC_GASM_RESTRICT = 1,PC_GASM_INTERPOLATE = 2,PC_GASM_NONE = 0} PCGASMType; 320 extern const char *PCGASMTypes[]; 321 322 extern PetscErrorCode PCGASMSetLocalSubdomains(PC,PetscInt,IS[],IS[]); 323 extern PetscErrorCode PCGASMSetTotalSubdomains(PC,PetscInt); 324 extern PetscErrorCode PCGASMSetOverlap(PC,PetscInt); 325 extern PetscErrorCode PCGASMSetSortIndices(PC,PetscBool ); 326 327 extern PetscErrorCode PCGASMSetType(PC,PCGASMType); 328 extern PetscErrorCode PCGASMCreateSubdomains(Mat,PetscInt,IS*[]); 329 extern PetscErrorCode PCGASMDestroySubdomains(PetscInt,IS[],IS[]); 330 extern PetscErrorCode PCGASMCreateSubdomains2D(PC,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt*,IS**,IS**); 331 extern PetscErrorCode PCGASMGetLocalSubdomains(PC,PetscInt*,IS*[],IS*[]); 332 extern PetscErrorCode PCGASMGetLocalSubmatrices(PC,PetscInt*,Mat*[]); 333 334 /*E 335 PCCompositeType - Determines how two or more preconditioner are composed 336 337 $ PC_COMPOSITE_ADDITIVE - results from application of all preconditioners are added together 338 $ PC_COMPOSITE_MULTIPLICATIVE - preconditioners are applied sequentially to the residual freshly 339 $ computed after the previous preconditioner application 340 $ PC_COMPOSITE_SYMMETRIC_MULTIPLICATIVE - preconditioners are applied sequentially to the residual freshly 341 $ computed from first preconditioner to last and then back (Use only for symmetric matrices and preconditions) 342 $ PC_COMPOSITE_SPECIAL - This is very special for a matrix of the form alpha I + R + S 343 $ where first preconditioner is built from alpha I + S and second from 344 $ alpha I + R 345 346 Level: beginner 347 348 .seealso: PCCompositeSetType() 349 E*/ 350 typedef enum {PC_COMPOSITE_ADDITIVE,PC_COMPOSITE_MULTIPLICATIVE,PC_COMPOSITE_SYMMETRIC_MULTIPLICATIVE,PC_COMPOSITE_SPECIAL,PC_COMPOSITE_SCHUR} PCCompositeType; 351 extern const char *PCCompositeTypes[]; 352 353 extern PetscErrorCode PCCompositeSetUseTrue(PC); 354 extern PetscErrorCode PCCompositeSetType(PC,PCCompositeType); 355 extern PetscErrorCode PCCompositeAddPC(PC,PCType); 356 extern PetscErrorCode PCCompositeGetPC(PC,PetscInt,PC *); 357 extern PetscErrorCode PCCompositeSpecialSetAlpha(PC,PetscScalar); 358 359 extern PetscErrorCode PCRedundantSetNumber(PC,PetscInt); 360 extern PetscErrorCode PCRedundantSetScatter(PC,VecScatter,VecScatter); 361 extern PetscErrorCode PCRedundantGetOperators(PC,Mat*,Mat*); 362 363 extern PetscErrorCode PCSPAISetEpsilon(PC,double); 364 extern PetscErrorCode PCSPAISetNBSteps(PC,PetscInt); 365 extern PetscErrorCode PCSPAISetMax(PC,PetscInt); 366 extern PetscErrorCode PCSPAISetMaxNew(PC,PetscInt); 367 extern PetscErrorCode PCSPAISetBlockSize(PC,PetscInt); 368 extern PetscErrorCode PCSPAISetCacheSize(PC,PetscInt); 369 extern PetscErrorCode PCSPAISetVerbose(PC,PetscInt); 370 extern PetscErrorCode PCSPAISetSp(PC,PetscInt); 371 372 extern PetscErrorCode PCHYPRESetType(PC,const char[]); 373 extern PetscErrorCode PCHYPREGetType(PC,const char*[]); 374 extern PetscErrorCode PCBJacobiGetLocalBlocks(PC,PetscInt*,const PetscInt*[]); 375 extern PetscErrorCode PCBJacobiGetTotalBlocks(PC,PetscInt*,const PetscInt*[]); 376 377 extern PetscErrorCode PCFieldSplitSetFields(PC,const char[],PetscInt,const PetscInt*); 378 extern PetscErrorCode PCFieldSplitSetType(PC,PCCompositeType); 379 extern PetscErrorCode PCFieldSplitSetBlockSize(PC,PetscInt); 380 extern PetscErrorCode PCFieldSplitSetIS(PC,const char[],IS); 381 extern PetscErrorCode PCFieldSplitGetIS(PC,const char[],IS*); 382 383 /*E 384 PCFieldSplitSchurPreType - Determines how to precondition Schur complement 385 386 Level: intermediate 387 388 .seealso: PCFieldSplitSchurPrecondition() 389 E*/ 390 typedef enum {PC_FIELDSPLIT_SCHUR_PRE_SELF,PC_FIELDSPLIT_SCHUR_PRE_DIAG,PC_FIELDSPLIT_SCHUR_PRE_USER} PCFieldSplitSchurPreType; 391 extern const char *const PCFieldSplitSchurPreTypes[]; 392 393 extern PetscErrorCode PCFieldSplitSchurPrecondition(PC,PCFieldSplitSchurPreType,Mat); 394 extern PetscErrorCode PCFieldSplitGetSchurBlocks(PC,Mat*,Mat*,Mat*,Mat*); 395 396 extern PetscErrorCode PCGalerkinSetRestriction(PC,Mat); 397 extern PetscErrorCode PCGalerkinSetInterpolation(PC,Mat); 398 399 extern PetscErrorCode PCSetCoordinates(PC,PetscInt,PetscReal*); 400 extern PetscErrorCode PCSASetVectors(PC,PetscInt,PetscReal *); 401 402 extern PetscErrorCode PCPythonSetType(PC,const char[]); 403 404 extern PetscErrorCode PCSetDM(PC,DM); 405 extern PetscErrorCode PCGetDM(PC,DM*); 406 407 extern PetscErrorCode PCSetApplicationContext(PC,void*); 408 extern PetscErrorCode PCGetApplicationContext(PC,void*); 409 410 extern PetscErrorCode PCBiCGStabCUSPSetTolerance(PC,PetscReal); 411 extern PetscErrorCode PCBiCGStabCUSPSetIterations(PC,PetscInt); 412 extern PetscErrorCode PCBiCGStabCUSPSetUseVerboseMonitor(PC,PetscBool); 413 414 extern PetscErrorCode PCAINVCUSPSetDropTolerance(PC,PetscReal); 415 extern PetscErrorCode PCAINVCUSPUseScaling(PC,PetscBool); 416 extern PetscErrorCode PCAINVCUSPSetNonzeros(PC,PetscInt); 417 extern PetscErrorCode PCAINVCUSPSetLinParameter(PC,PetscInt); 418 /*E 419 PCPARMSGlobalType - Determines the global preconditioner method in PARMS 420 421 Level: intermediate 422 423 .seealso: PCPARMSSetGlobal() 424 E*/ 425 typedef enum {PC_PARMS_GLOBAL_RAS,PC_PARMS_GLOBAL_SCHUR,PC_PARMS_GLOBAL_BJ} PCPARMSGlobalType; 426 extern const char *PCPARMSGlobalTypes[]; 427 /*E 428 PCPARMSLocalType - Determines the local preconditioner method in PARMS 429 430 Level: intermediate 431 432 .seealso: PCPARMSSetLocal() 433 E*/ 434 typedef enum {PC_PARMS_LOCAL_ILU0,PC_PARMS_LOCAL_ILUK,PC_PARMS_LOCAL_ILUT,PC_PARMS_LOCAL_ARMS} PCPARMSLocalType; 435 extern const char *PCPARMSLocalTypes[]; 436 437 extern PetscErrorCode PCPARMSSetGlobal(PC pc,PCPARMSGlobalType type); 438 extern PetscErrorCode PCPARMSSetLocal(PC pc,PCPARMSLocalType type); 439 extern PetscErrorCode PCPARMSSetSolveTolerances(PC pc,PetscReal tol,PetscInt maxits); 440 extern PetscErrorCode PCPARMSSetSolveRestart(PC pc,PetscInt restart); 441 extern PetscErrorCode PCPARMSSetNonsymPerm(PC pc,PetscBool nonsym); 442 extern PetscErrorCode PCPARMSSetFill(PC pc,PetscInt lfil0,PetscInt lfil1,PetscInt lfil2); 443 444 extern PetscErrorCode PCGAMGSetProcEqLim(PC,PetscInt); 445 extern PetscErrorCode PCGAMGSetRepartitioning(PC,PetscBool); 446 extern PetscErrorCode PCGAMGSetSolverType(PC,char[],PetscInt); 447 extern PetscErrorCode PCGAMGSetThreshold(PC,PetscReal); 448 extern PetscErrorCode PCGAMGSetCoarseEqLim(PC,PetscInt); 449 extern PetscErrorCode PCGAMGSetNlevels(PC,PetscInt); 450 451 #if defined(PETSC_HAVE_PCBDDC) 452 /* Enum defining how to treat the coarse problem */ 453 typedef enum {SEQUENTIAL_BDDC,REPLICATED_BDDC,PARALLEL_BDDC,MULTILEVEL_BDDC} CoarseProblemType; 454 extern PetscErrorCode PCBDDCSetNeumannBoundaries(PC,IS); 455 extern PetscErrorCode PCBDDCGetNeumannBoundaries(PC,IS*); 456 extern PetscErrorCode PCBDDCSetCoarseProblemType(PC,CoarseProblemType); 457 extern PetscErrorCode PCBDDCSetDofsSplitting(PC,PetscInt,IS[]); 458 #endif 459 460 PETSC_EXTERN_CXX_END 461 462 #endif /* __PETSCPC_H */ 463