Actual source code: petscpc.h

  1: /*
  2:       Preconditioner module. 
  3: */
 6:  #include petscmat.h

  9: EXTERN PetscErrorCode   PCInitializePackage(const char[]);

 11: /*
 12:     PCList contains the list of preconditioners currently registered
 13:    These are added with the PCRegisterDynamic() macro
 14: */

 17: /*S
 18:      PC - Abstract PETSc object that manages all preconditioners

 20:    Level: beginner

 22:   Concepts: preconditioners

 24: .seealso:  PCCreate(), PCSetType(), PCType (for list of available types)
 25: S*/
 26: typedef struct _p_PC* PC;

 28: /*E
 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()

 33:    Level: beginner

 35:    Notes: Click on the links below to see details on a particular solver

 37: .seealso: PCSetType(), PC, PCCreate()
 38: E*/
 39: #define PCType const 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 PCKSP             "ksp"
 52: #define PCCOMPOSITE       "composite"
 53: #define PCREDUNDANT       "redundant"
 54: #define PCSPAI            "spai"
 55: #define PCNN              "nn"
 56: #define PCCHOLESKY        "cholesky"
 57: #define PCSAMG            "samg"
 58: #define PCPBJACOBI        "pbjacobi"
 59: #define PCMAT             "mat"
 60: #define PCHYPRE           "hypre"
 61: #define PCFIELDSPLIT      "fieldsplit"
 62: #define PCTFS             "tfs"
 63: #define PCML              "ml"
 64: #define PCPROMETHEUS      "prometheus"
 65: #define PCGALERKIN        "galerkin"
 66: #define PCOPENMP          "openmp"
 67: #define PCSUPPORTGRAPH    "supportgraph"
 68: #define PCASA             "asa"

 70: /* Logging support */

 73: /*E
 74:     PCSide - If the preconditioner is to be applied to the left, right
 75:      or symmetrically around the operator.

 77:    Level: beginner

 79: .seealso: 
 80: E*/
 81: typedef enum { PC_LEFT,PC_RIGHT,PC_SYMMETRIC } PCSide;

 84: EXTERN PetscErrorCode  PCCreate(MPI_Comm,PC*);
 85: EXTERN PetscErrorCode  PCSetType(PC,PCType);
 86: EXTERN PetscErrorCode  PCSetUp(PC);
 87: EXTERN PetscErrorCode  PCSetUpOnBlocks(PC);
 88: EXTERN PetscErrorCode  PCApply(PC,Vec,Vec);
 89: EXTERN PetscErrorCode  PCApplySymmetricLeft(PC,Vec,Vec);
 90: EXTERN PetscErrorCode  PCApplySymmetricRight(PC,Vec,Vec);
 91: EXTERN PetscErrorCode  PCApplyBAorAB(PC,PCSide,Vec,Vec,Vec);
 92: EXTERN PetscErrorCode  PCApplyTranspose(PC,Vec,Vec);
 93: EXTERN PetscErrorCode  PCApplyTransposeExists(PC,PetscTruth*);
 94: EXTERN PetscErrorCode  PCApplyBAorABTranspose(PC,PCSide,Vec,Vec,Vec);
 95: EXTERN PetscErrorCode  PCApplyRichardson(PC,Vec,Vec,Vec,PetscReal,PetscReal,PetscReal,PetscInt);
 96: EXTERN PetscErrorCode  PCApplyRichardsonExists(PC,PetscTruth*);
 97: EXTERN PetscErrorCode  PCSetInitialGuessNonzero(PC,PetscTruth);

 99: EXTERN PetscErrorCode  PCRegisterDestroy(void);
100: EXTERN PetscErrorCode  PCRegisterAll(const char[]);

103: EXTERN PetscErrorCode  PCRegister(const char[],const char[],const char[],PetscErrorCode(*)(PC));

105: /*MC
106:    PCRegisterDynamic - Adds a method to the preconditioner package.

108:    Synopsis:
109:    PetscErrorCode PCRegisterDynamic(char *name_solver,char *path,char *name_create,PetscErrorCode (*routine_create)(PC))

111:    Not collective

113:    Input Parameters:
114: +  name_solver - name of a new user-defined solver
115: .  path - path (either absolute or relative) the library containing this solver
116: .  name_create - name of routine to create method context
117: -  routine_create - routine to create method context

119:    Notes:
120:    PCRegisterDynamic() may be called multiple times to add several user-defined preconditioners.

122:    If dynamic libraries are used, then the fourth input argument (routine_create)
123:    is ignored.

125:    Sample usage:
126: .vb
127:    PCRegisterDynamic("my_solver","/home/username/my_lib/lib/libO/solaris/mylib",
128:               "MySolverCreate",MySolverCreate);
129: .ve

131:    Then, your solver can be chosen with the procedural interface via
132: $     PCSetType(pc,"my_solver")
133:    or at runtime via the option
134: $     -pc_type my_solver

136:    Level: advanced

138:    Notes: ${PETSC_ARCH}, ${PETSC_DIR}, ${PETSC_LIB_DIR},  or ${any environmental variable}
139:            occuring in pathname will be replaced with appropriate values.
140:          If your function is not being put into a shared library then use PCRegister() instead

142: .keywords: PC, register

144: .seealso: PCRegisterAll(), PCRegisterDestroy()
145: M*/
146: #if defined(PETSC_USE_DYNAMIC_LIBRARIES)
147: #define PCRegisterDynamic(a,b,c,d) PCRegister(a,b,c,0)
148: #else
149: #define PCRegisterDynamic(a,b,c,d) PCRegister(a,b,c,d)
150: #endif

152: EXTERN PetscErrorCode  PCDestroy(PC);
153: EXTERN PetscErrorCode  PCSetFromOptions(PC);
154: EXTERN PetscErrorCode  PCGetType(PC,PCType*);

156: EXTERN PetscErrorCode  PCFactorGetMatrix(PC,Mat*);
157: EXTERN PetscErrorCode  PCSetModifySubMatrices(PC,PetscErrorCode(*)(PC,PetscInt,const IS[],const IS[],Mat[],void*),void*);
158: EXTERN PetscErrorCode  PCModifySubMatrices(PC,PetscInt,const IS[],const IS[],Mat[],void*);

160: EXTERN PetscErrorCode  PCSetOperators(PC,Mat,Mat,MatStructure);
161: EXTERN PetscErrorCode  PCGetOperators(PC,Mat*,Mat*,MatStructure*);
162: EXTERN PetscErrorCode  PCGetOperatorsSet(PC,PetscTruth*,PetscTruth*);

164: EXTERN PetscErrorCode  PCView(PC,PetscViewer);

166: EXTERN PetscErrorCode  PCSetOptionsPrefix(PC,const char[]);
167: EXTERN PetscErrorCode  PCAppendOptionsPrefix(PC,const char[]);
168: EXTERN PetscErrorCode  PCGetOptionsPrefix(PC,const char*[]);

170: EXTERN PetscErrorCode  PCComputeExplicitOperator(PC,Mat*);

172: /*
173:       These are used to provide extra scaling of preconditioned 
174:    operator for time-stepping schemes like in SUNDIALS 
175: */
176: EXTERN PetscErrorCode  PCDiagonalScale(PC,PetscTruth*);
177: EXTERN PetscErrorCode  PCDiagonalScaleLeft(PC,Vec,Vec);
178: EXTERN PetscErrorCode  PCDiagonalScaleRight(PC,Vec,Vec);
179: EXTERN PetscErrorCode  PCDiagonalScaleSet(PC,Vec);

181: /* ------------- options specific to particular preconditioners --------- */

183: EXTERN PetscErrorCode  PCJacobiSetUseRowMax(PC);
184: EXTERN PetscErrorCode  PCJacobiSetUseRowSum(PC);
185: EXTERN PetscErrorCode  PCJacobiSetUseAbs(PC);
186: EXTERN PetscErrorCode  PCSORSetSymmetric(PC,MatSORType);
187: EXTERN PetscErrorCode  PCSORSetOmega(PC,PetscReal);
188: EXTERN PetscErrorCode  PCSORSetIterations(PC,PetscInt,PetscInt);

190: EXTERN PetscErrorCode  PCEisenstatSetOmega(PC,PetscReal);
191: EXTERN PetscErrorCode  PCEisenstatNoDiagonalScaling(PC);

193: #define USE_PRECONDITIONER_MATRIX 0
194: #define USE_TRUE_MATRIX           1
195: EXTERN PetscErrorCode  PCBJacobiSetUseTrueLocal(PC);
196: EXTERN PetscErrorCode  PCBJacobiSetTotalBlocks(PC,PetscInt,const PetscInt[]);
197: EXTERN PetscErrorCode  PCBJacobiSetLocalBlocks(PC,PetscInt,const PetscInt[]);

199: EXTERN PetscErrorCode  PCKSPSetUseTrue(PC);

201: EXTERN PetscErrorCode  PCShellSetApply(PC,PetscErrorCode (*)(void*,Vec,Vec));
202: EXTERN PetscErrorCode  PCShellSetApplyBA(PC,PetscErrorCode (*)(void*,PCSide,Vec,Vec,Vec));
203: EXTERN PetscErrorCode  PCShellSetApplyTranspose(PC,PetscErrorCode (*)(void*,Vec,Vec));
204: EXTERN PetscErrorCode  PCShellSetSetUp(PC,PetscErrorCode (*)(void*));
205: EXTERN PetscErrorCode  PCShellSetApplyRichardson(PC,PetscErrorCode (*)(void*,Vec,Vec,Vec,PetscReal,PetscReal,PetscReal,PetscInt));
206: EXTERN PetscErrorCode  PCShellSetView(PC,PetscErrorCode (*)(void*,PetscViewer));
207: EXTERN PetscErrorCode  PCShellSetDestroy(PC,PetscErrorCode (*)(void*));
208: EXTERN PetscErrorCode  PCShellGetContext(PC,void**);
209: EXTERN PetscErrorCode  PCShellSetContext(PC,void*);
210: EXTERN PetscErrorCode  PCShellSetName(PC,const char[]);
211: EXTERN PetscErrorCode  PCShellGetName(PC,char*[]);

213: EXTERN PetscErrorCode  PCFactorSetZeroPivot(PC,PetscReal);
214: EXTERN PetscErrorCode  PCFactorSetShiftNonzero(PC,PetscReal);
215: EXTERN PetscErrorCode  PCFactorSetShiftPd(PC,PetscTruth);


218: EXTERN PetscErrorCode  PCFactorSetFill(PC,PetscReal);
219: EXTERN PetscErrorCode  PCFactorSetPivoting(PC,PetscReal);
220: EXTERN PetscErrorCode  PCFactorReorderForNonzeroDiagonal(PC,PetscReal);

222: EXTERN PetscErrorCode  PCFactorSetMatOrderingType(PC,MatOrderingType);
223: EXTERN PetscErrorCode  PCFactorSetReuseOrdering(PC,PetscTruth);
224: EXTERN PetscErrorCode  PCFactorSetReuseFill(PC,PetscTruth);
225: EXTERN PetscErrorCode  PCFactorSetUseInPlace(PC);
226: EXTERN PetscErrorCode  PCFactorSetAllowDiagonalFill(PC);
227: EXTERN PetscErrorCode  PCFactorSetPivotInBlocks(PC,PetscTruth);

229: EXTERN PetscErrorCode  PCFactorSetLevels(PC,PetscInt);
230: EXTERN PetscErrorCode  PCFactorSetUseDropTolerance(PC,PetscReal,PetscReal,PetscInt);

232: EXTERN PetscErrorCode  PCASMSetLocalSubdomains(PC,PetscInt,IS[]);
233: EXTERN PetscErrorCode  PCASMSetTotalSubdomains(PC,PetscInt,IS[]);
234: EXTERN PetscErrorCode  PCASMSetOverlap(PC,PetscInt);
235: /*E
236:     PCASMType - Type of additive Schwarz method to use

238: $  PC_ASM_BASIC - symmetric version where residuals from the ghost points are used
239: $                 and computed values in ghost regions are added together. Classical
240: $                 standard additive Schwarz
241: $  PC_ASM_RESTRICT - residuals from ghost points are used but computed values in ghost
242: $                    region are discarded. Default
243: $  PC_ASM_INTERPOLATE - residuals from ghost points are not used, computed values in ghost
244: $                       region are added back in
245: $  PC_ASM_NONE - ghost point residuals are not used, computed ghost values are discarded
246: $                not very good.                

248:    Level: beginner

250: .seealso: PCASMSetType()
251: E*/
252: typedef enum {PC_ASM_BASIC = 3,PC_ASM_RESTRICT = 1,PC_ASM_INTERPOLATE = 2,PC_ASM_NONE = 0} PCASMType;

255: EXTERN PetscErrorCode  PCASMSetType(PC,PCASMType);
256: EXTERN PetscErrorCode  PCASMCreateSubdomains2D(PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt *,IS **);
257: EXTERN PetscErrorCode  PCASMSetUseInPlace(PC);
258: EXTERN PetscErrorCode  PCASMGetLocalSubdomains(PC,PetscInt*,IS*[]);
259: EXTERN PetscErrorCode  PCASMGetLocalSubmatrices(PC,PetscInt*,Mat*[]);

261: /*E
262:     PCCompositeType - Determines how two or more preconditioner are composed

264: $  PC_COMPOSITE_ADDITIVE - results from application of all preconditioners are added together
265: $  PC_COMPOSITE_MULTIPLICATIVE - preconditioners are applied sequentially to the residual freshly
266: $                                computed after the previous preconditioner application
267: $  PC_COMPOSITE_SYMMETRIC_MULTIPLICATIVE - preconditioners are applied sequentially to the residual freshly 
268: $                                computed from first preconditioner to last and then back (Use only for symmetric matrices and preconditions)
269: $  PC_COMPOSITE_SPECIAL - This is very special for a matrix of the form alpha I + R + S
270: $                         where first preconditioner is built from alpha I + S and second from
271: $                         alpha I + R

273:    Level: beginner

275: .seealso: PCCompositeSetType()
276: E*/
277: typedef enum {PC_COMPOSITE_ADDITIVE,PC_COMPOSITE_MULTIPLICATIVE,PC_COMPOSITE_SYMMETRIC_MULTIPLICATIVE,PC_COMPOSITE_SPECIAL} PCCompositeType;

280: EXTERN PetscErrorCode  PCCompositeSetUseTrue(PC);
281: EXTERN PetscErrorCode  PCCompositeSetType(PC,PCCompositeType);
282: EXTERN PetscErrorCode  PCCompositeAddPC(PC,PCType);
283: EXTERN PetscErrorCode  PCCompositeGetPC(PC,PetscInt,PC *);
284: EXTERN PetscErrorCode  PCCompositeSpecialSetAlpha(PC,PetscScalar);

286: EXTERN PetscErrorCode  PCRedundantSetNumber(PC,PetscInt);
287: EXTERN PetscErrorCode  PCRedundantSetScatter(PC,VecScatter,VecScatter);
288: EXTERN PetscErrorCode  PCRedundantGetOperators(PC,Mat*,Mat*);
289: EXTERN PetscErrorCode  PCRedundantGetPC(PC,PC*);

291: EXTERN PetscErrorCode  PCSPAISetEpsilon(PC,double);
292: EXTERN PetscErrorCode  PCSPAISetNBSteps(PC,PetscInt);
293: EXTERN PetscErrorCode  PCSPAISetMax(PC,PetscInt);
294: EXTERN PetscErrorCode  PCSPAISetMaxNew(PC,PetscInt);
295: EXTERN PetscErrorCode  PCSPAISetBlockSize(PC,PetscInt);
296: EXTERN PetscErrorCode  PCSPAISetCacheSize(PC,PetscInt);
297: EXTERN PetscErrorCode  PCSPAISetVerbose(PC,PetscInt);
298: EXTERN PetscErrorCode  PCSPAISetSp(PC,PetscInt);

300: EXTERN PetscErrorCode  PCHYPRESetType(PC,const char[]);
301: EXTERN PetscErrorCode  PCHYPREGetType(PC,const char*[]);
302: EXTERN PetscErrorCode  PCBJacobiGetLocalBlocks(PC,PetscInt*,const PetscInt*[]);
303: EXTERN PetscErrorCode  PCBJacobiGetTotalBlocks(PC,PetscInt*,const PetscInt*[]);

305: EXTERN PetscErrorCode  PCFieldSplitSetFields(PC,PetscInt,PetscInt*);
306: EXTERN PetscErrorCode  PCFieldSplitSetType(PC,PCCompositeType);
307: EXTERN PetscErrorCode  PCFieldSplitSetBlockSize(PC,PetscInt);

309: EXTERN PetscErrorCode  PCGalerkinSetRestriction(PC,Mat);
310: EXTERN PetscErrorCode  PCGalerkinSetInterpolation(PC,Mat);

312: EXTERN PetscErrorCode  PCSetCoordinates(PC,PetscInt,PetscReal*);
313: EXTERN PetscErrorCode  PCSASetVectors(PC,PetscInt,PetscReal *);


317: #endif /* __PETSCPC_H */