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: */
 16: #define PCType const char*

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

 21:    Level: beginner

 23:   Concepts: preconditioners

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

 29: /*E
 30:     PCType - String with the name of a PETSc preconditioner method or the creation function
 31:        with an optional dynamic library name, for example
 32:        http://www.mcs.anl.gov/petsc/lib.a:mypccreate()

 34:    Level: beginner

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

 38: .seealso: PCSetType(), PC, PCCreate()
 39: E*/
 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"

 68: /* Logging support */

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

 75:    Level: beginner

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

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

 96: EXTERN PetscErrorCode  PCRegisterDestroy(void);
 97: EXTERN PetscErrorCode  PCRegisterAll(const char[]);

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

102: /*MC
103:    PCRegisterDynamic - Adds a method to the preconditioner package.

105:    Synopsis:
106:    PetscErrorCode PCRegisterDynamic(char *name_solver,char *path,char *name_create,PetscErrorCode (*routine_create)(PC))

108:    Not collective

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

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

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

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

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

133:    Level: advanced

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

139: .keywords: PC, register

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

149: EXTERN PetscErrorCode  PCDestroy(PC);
150: EXTERN PetscErrorCode  PCSetFromOptions(PC);
151: EXTERN PetscErrorCode  PCGetType(PC,PCType*);

153: EXTERN PetscErrorCode  PCGetFactoredMatrix(PC,Mat*);
154: EXTERN PetscErrorCode  PCSetModifySubMatrices(PC,PetscErrorCode(*)(PC,PetscInt,const IS[],const IS[],Mat[],void*),void*);
155: EXTERN PetscErrorCode  PCModifySubMatrices(PC,PetscInt,const IS[],const IS[],Mat[],void*);

157: EXTERN PetscErrorCode  PCSetOperators(PC,Mat,Mat,MatStructure);
158: EXTERN PetscErrorCode  PCGetOperators(PC,Mat*,Mat*,MatStructure*);
159: EXTERN PetscErrorCode  PCGetOperatorsSet(PC,PetscTruth*,PetscTruth*);

161: EXTERN PetscErrorCode  PCView(PC,PetscViewer);

163: EXTERN PetscErrorCode  PCSetOptionsPrefix(PC,const char[]);
164: EXTERN PetscErrorCode  PCAppendOptionsPrefix(PC,const char[]);
165: EXTERN PetscErrorCode  PCGetOptionsPrefix(PC,const char*[]);

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

169: /*
170:       These are used to provide extra scaling of preconditioned 
171:    operator for time-stepping schemes like in SUNDIALS 
172: */
173: EXTERN PetscErrorCode  PCDiagonalScale(PC,PetscTruth*);
174: EXTERN PetscErrorCode  PCDiagonalScaleLeft(PC,Vec,Vec);
175: EXTERN PetscErrorCode  PCDiagonalScaleRight(PC,Vec,Vec);
176: EXTERN PetscErrorCode  PCDiagonalScaleSet(PC,Vec);

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

180: EXTERN PetscErrorCode  PCJacobiSetUseRowMax(PC);
181: EXTERN PetscErrorCode  PCJacobiSetUseAbs(PC);
182: EXTERN PetscErrorCode  PCSORSetSymmetric(PC,MatSORType);
183: EXTERN PetscErrorCode  PCSORSetOmega(PC,PetscReal);
184: EXTERN PetscErrorCode  PCSORSetIterations(PC,PetscInt,PetscInt);

186: EXTERN PetscErrorCode  PCEisenstatSetOmega(PC,PetscReal);
187: EXTERN PetscErrorCode  PCEisenstatNoDiagonalScaling(PC);

189: #define USE_PRECONDITIONER_MATRIX 0
190: #define USE_TRUE_MATRIX           1
191: EXTERN PetscErrorCode  PCBJacobiSetUseTrueLocal(PC);
192: EXTERN PetscErrorCode  PCBJacobiSetTotalBlocks(PC,PetscInt,const PetscInt[]);
193: EXTERN PetscErrorCode  PCBJacobiSetLocalBlocks(PC,PetscInt,const PetscInt[]);

195: EXTERN PetscErrorCode  PCKSPSetUseTrue(PC);

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

209: EXTERN PetscErrorCode  PCFactorSetZeroPivot(PC,PetscReal);
210: EXTERN PetscErrorCode  PCFactorSetShiftNonzero(PC,PetscReal);
211: EXTERN PetscErrorCode  PCFactorSetShiftPd(PC,PetscTruth);


214: EXTERN PetscErrorCode  PCFactorSetFill(PC,PetscReal);
215: EXTERN PetscErrorCode  PCFactorSetPivoting(PC,PetscReal);
216: EXTERN PetscErrorCode  PCFactorReorderForNonzeroDiagonal(PC,PetscReal);

218: EXTERN PetscErrorCode  PCFactorSetMatOrdering(PC,MatOrderingType);
219: EXTERN PetscErrorCode  PCFactorSetReuseOrdering(PC,PetscTruth);
220: EXTERN PetscErrorCode  PCFactorSetReuseFill(PC,PetscTruth);
221: EXTERN PetscErrorCode  PCFactorSetUseInPlace(PC);
222: EXTERN PetscErrorCode  PCFactorSetAllowDiagonalFill(PC);
223: EXTERN PetscErrorCode  PCFactorSetPivotInBlocks(PC,PetscTruth);

225: EXTERN PetscErrorCode  PCFactorSetLevels(PC,PetscInt);
226: EXTERN PetscErrorCode  PCFactorSetUseDropTolerance(PC,PetscReal,PetscReal,PetscInt);

228: EXTERN PetscErrorCode  PCASMSetLocalSubdomains(PC,PetscInt,IS[]);
229: EXTERN PetscErrorCode  PCASMSetTotalSubdomains(PC,PetscInt,IS[]);
230: EXTERN PetscErrorCode  PCASMSetOverlap(PC,PetscInt);
231: /*E
232:     PCASMType - Type of additive Schwarz method to use

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

244:    Level: beginner

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

251: EXTERN PetscErrorCode  PCASMSetType(PC,PCASMType);
252: EXTERN PetscErrorCode  PCASMCreateSubdomains2D(PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt *,IS **);
253: EXTERN PetscErrorCode  PCASMSetUseInPlace(PC);
254: EXTERN PetscErrorCode  PCASMGetLocalSubdomains(PC,PetscInt*,IS*[]);
255: EXTERN PetscErrorCode  PCASMGetLocalSubmatrices(PC,PetscInt*,Mat*[]);

257: /*E
258:     PCCompositeType - Determines how two or more preconditioner are composed

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

269:    Level: beginner

271: .seealso: PCCompositeSetType()
272: E*/
273: typedef enum {PC_COMPOSITE_ADDITIVE,PC_COMPOSITE_MULTIPLICATIVE,PC_COMPOSITE_SYMMETRIC_MULTIPLICATIVE,PC_COMPOSITE_SPECIAL} PCCompositeType;

276: EXTERN PetscErrorCode  PCCompositeSetUseTrue(PC);
277: EXTERN PetscErrorCode  PCCompositeSetType(PC,PCCompositeType);
278: EXTERN PetscErrorCode  PCCompositeAddPC(PC,PCType);
279: EXTERN PetscErrorCode  PCCompositeGetPC(PC pc,PetscInt n,PC *);
280: EXTERN PetscErrorCode  PCCompositeSpecialSetAlpha(PC,PetscScalar);

282: EXTERN PetscErrorCode  PCRedundantSetScatter(PC,VecScatter,VecScatter);
283: EXTERN PetscErrorCode  PCRedundantGetOperators(PC,Mat*,Mat*);
284: EXTERN PetscErrorCode  PCRedundantGetPC(PC,PC*);

286: EXTERN PetscErrorCode  PCSPAISetEpsilon(PC,double);
287: EXTERN PetscErrorCode  PCSPAISetNBSteps(PC,PetscInt);
288: EXTERN PetscErrorCode  PCSPAISetMax(PC,PetscInt);
289: EXTERN PetscErrorCode  PCSPAISetMaxNew(PC,PetscInt);
290: EXTERN PetscErrorCode  PCSPAISetBlockSize(PC,PetscInt);
291: EXTERN PetscErrorCode  PCSPAISetCacheSize(PC,PetscInt);
292: EXTERN PetscErrorCode  PCSPAISetVerbose(PC,PetscInt);
293: EXTERN PetscErrorCode  PCSPAISetSp(PC,PetscInt);

295: EXTERN PetscErrorCode  PCHYPRESetType(PC,const char[]);
296: EXTERN PetscErrorCode  PCHYPREGetType(PC,const char*[]);
297: EXTERN PetscErrorCode  PCBJacobiGetLocalBlocks(PC,PetscInt*,const PetscInt*[]);
298: EXTERN PetscErrorCode  PCBJacobiGetTotalBlocks(PC,PetscInt*,const PetscInt*[]);

300: EXTERN PetscErrorCode  PCFieldSplitSetFields(PC,PetscInt,PetscInt*);
301: EXTERN PetscErrorCode  PCFieldSplitSetType(PC,PCCompositeType);
302: EXTERN PetscErrorCode  PCFieldSplitSetBlockSize(PC,PetscInt);

304: EXTERN PetscErrorCode  PCGalerkinSetRestriction(PC,Mat);
305: EXTERN PetscErrorCode  PCGalerkinSetInterpolation(PC,Mat);

307: EXTERN PetscErrorCode  PCSetCoordinates(PC,PetscInt,PetscReal*);
308: EXTERN PetscErrorCode  PCSASetVectors(PC,PetscInt,PetscReal *);


312: #endif /* __PETSCPC_H */