Actual source code: petscpc.h

petsc-3.4.4 2014-03-13
  1: /*
  2:       Preconditioner module.
  3: */
  6: #include <petscmat.h>
  7: #include <petscdmtypes.h>

  9: PETSC_EXTERN PetscErrorCode PCInitializePackage(void);

 11: /*
 12:     PCList contains the list of preconditioners currently registered
 13:    These are added with PCRegister()
 14: */
 15: PETSC_EXTERN PetscFunctionList PCList;

 17: /*S
 18:      PC - Abstract PETSc object that manages all preconditioners including direct solvers such as PCLU

 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: /*J
 29:     PCType - String with the name of a PETSc preconditioner method.

 31:    Level: beginner

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

 35:           PCRegister() is used to register preconditioners that are then accessible via PCSetType()

 37: .seealso: PCSetType(), PC, PCCreate(), PCRegister(), PCSetFromOptions()
 38: J*/
 39: typedef const char* PCType;
 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 PCGALERKIN        "galerkin"
 66: #define PCEXOTIC          "exotic"
 67: #define PCHMPI            "hmpi"
 68: #define PCSUPPORTGRAPH    "supportgraph"
 69: #define PCASA             "asa"
 70: #define PCCP              "cp"
 71: #define PCBFBT            "bfbt"
 72: #define PCLSC             "lsc"
 73: #define PCPYTHON          "python"
 74: #define PCPFMG            "pfmg"
 75: #define PCSYSPFMG         "syspfmg"
 76: #define PCREDISTRIBUTE    "redistribute"
 77: #define PCSVD             "svd"
 78: #define PCGAMG            "gamg"
 79: #define PCSACUSP          "sacusp"        /* these four run on NVIDIA GPUs using CUSP */
 80: #define PCSACUSPPOLY      "sacusppoly"
 81: #define PCBICGSTABCUSP    "bicgstabcusp"
 82: #define PCAINVCUSP        "ainvcusp"
 83: #define PCBDDC            "bddc"

 85: /* Logging support */
 86: PETSC_EXTERN PetscClassId PC_CLASSID;

 88: /*E
 89:     PCSide - If the preconditioner is to be applied to the left, right
 90:      or symmetrically around the operator.

 92:    Level: beginner

 94: .seealso:
 95: E*/
 96: typedef enum { PC_SIDE_DEFAULT=-1,PC_LEFT,PC_RIGHT,PC_SYMMETRIC} PCSide;
 97: #define PC_SIDE_MAX (PC_SYMMETRIC + 1)
 98: PETSC_EXTERN const char *const *const PCSides;

100: PETSC_EXTERN PetscErrorCode PCCreate(MPI_Comm,PC*);
101: PETSC_EXTERN PetscErrorCode PCSetType(PC,PCType);
102: PETSC_EXTERN PetscErrorCode PCSetUp(PC);
103: PETSC_EXTERN PetscErrorCode PCSetUpOnBlocks(PC);
104: PETSC_EXTERN PetscErrorCode PCApply(PC,Vec,Vec);
105: PETSC_EXTERN PetscErrorCode PCApplySymmetricLeft(PC,Vec,Vec);
106: PETSC_EXTERN PetscErrorCode PCApplySymmetricRight(PC,Vec,Vec);
107: PETSC_EXTERN PetscErrorCode PCApplyBAorAB(PC,PCSide,Vec,Vec,Vec);
108: PETSC_EXTERN PetscErrorCode PCApplyTranspose(PC,Vec,Vec);
109: PETSC_EXTERN PetscErrorCode PCApplyTransposeExists(PC,PetscBool *);
110: PETSC_EXTERN PetscErrorCode PCApplyBAorABTranspose(PC,PCSide,Vec,Vec,Vec);

112: #define PC_FILE_CLASSID 1211222

114: /*E
115:     PCRichardsonConvergedReason - reason a PCApplyRichardson method terminates

117:    Level: advanced

119:    Notes: this must match finclude/petscpc.h and the KSPConvergedReason values in petscksp.h

121: .seealso: PCApplyRichardson()
122: E*/
123: typedef enum {
124:               PCRICHARDSON_CONVERGED_RTOL               =  2,
125:               PCRICHARDSON_CONVERGED_ATOL               =  3,
126:               PCRICHARDSON_CONVERGED_ITS                =  4,
127:               PCRICHARDSON_DIVERGED_DTOL                = -4} PCRichardsonConvergedReason;

129: PETSC_EXTERN PetscErrorCode PCApplyRichardson(PC,Vec,Vec,Vec,PetscReal,PetscReal,PetscReal,PetscInt,PetscBool ,PetscInt*,PCRichardsonConvergedReason*);
130: PETSC_EXTERN PetscErrorCode PCApplyRichardsonExists(PC,PetscBool *);
131: PETSC_EXTERN PetscErrorCode PCSetInitialGuessNonzero(PC,PetscBool );
132: PETSC_EXTERN PetscErrorCode PCSetUseAmat(PC,PetscBool);
133: PETSC_EXTERN PetscErrorCode PCGetUseAmat(PC,PetscBool*);

135: PETSC_EXTERN PetscErrorCode PCRegisterAll(void);
136: PETSC_EXTERN PetscBool PCRegisterAllCalled;

138: PETSC_EXTERN PetscErrorCode PCRegister(const char[],PetscErrorCode(*)(PC));

140: PETSC_EXTERN PetscErrorCode PCReset(PC);
141: PETSC_EXTERN PetscErrorCode PCDestroy(PC*);
142: PETSC_EXTERN PetscErrorCode PCSetFromOptions(PC);
143: PETSC_EXTERN PetscErrorCode PCGetType(PC,PCType*);

145: PETSC_EXTERN PetscErrorCode PCFactorGetMatrix(PC,Mat*);
146: PETSC_EXTERN PetscErrorCode PCSetModifySubMatrices(PC,PetscErrorCode(*)(PC,PetscInt,const IS[],const IS[],Mat[],void*),void*);
147: PETSC_EXTERN PetscErrorCode PCModifySubMatrices(PC,PetscInt,const IS[],const IS[],Mat[],void*);

149: PETSC_EXTERN PetscErrorCode PCSetOperators(PC,Mat,Mat,MatStructure);
150: PETSC_EXTERN PetscErrorCode PCGetOperators(PC,Mat*,Mat*,MatStructure*);
151: PETSC_EXTERN PetscErrorCode PCGetOperatorsSet(PC,PetscBool *,PetscBool *);

153: PETSC_EXTERN PetscErrorCode PCView(PC,PetscViewer);
154: PETSC_EXTERN PetscErrorCode PCLoad(PC,PetscViewer);

156: PETSC_EXTERN PetscErrorCode PCSetOptionsPrefix(PC,const char[]);
157: PETSC_EXTERN PetscErrorCode PCAppendOptionsPrefix(PC,const char[]);
158: PETSC_EXTERN PetscErrorCode PCGetOptionsPrefix(PC,const char*[]);

160: PETSC_EXTERN PetscErrorCode PCComputeExplicitOperator(PC,Mat*);

162: /*
163:       These are used to provide extra scaling of preconditioned
164:    operator for time-stepping schemes like in SUNDIALS
165: */
166: PETSC_EXTERN PetscErrorCode PCGetDiagonalScale(PC,PetscBool *);
167: PETSC_EXTERN PetscErrorCode PCDiagonalScaleLeft(PC,Vec,Vec);
168: PETSC_EXTERN PetscErrorCode PCDiagonalScaleRight(PC,Vec,Vec);
169: PETSC_EXTERN PetscErrorCode PCSetDiagonalScale(PC,Vec);

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

173: PETSC_EXTERN PetscErrorCode PCJacobiSetUseRowMax(PC);
174: PETSC_EXTERN PetscErrorCode PCJacobiSetUseRowSum(PC);
175: PETSC_EXTERN PetscErrorCode PCJacobiSetUseAbs(PC);
176: PETSC_EXTERN PetscErrorCode PCSORSetSymmetric(PC,MatSORType);
177: PETSC_EXTERN PetscErrorCode PCSORSetOmega(PC,PetscReal);
178: PETSC_EXTERN PetscErrorCode PCSORSetIterations(PC,PetscInt,PetscInt);

180: PETSC_EXTERN PetscErrorCode PCEisenstatSetOmega(PC,PetscReal);
181: PETSC_EXTERN PetscErrorCode PCEisenstatNoDiagonalScaling(PC);

183: PETSC_EXTERN PetscErrorCode PCBJacobiSetTotalBlocks(PC,PetscInt,const PetscInt[]);
184: PETSC_EXTERN PetscErrorCode PCBJacobiSetLocalBlocks(PC,PetscInt,const PetscInt[]);

186: PETSC_EXTERN PetscErrorCode PCShellSetApply(PC,PetscErrorCode (*)(PC,Vec,Vec));
187: PETSC_EXTERN PetscErrorCode PCShellSetApplyBA(PC,PetscErrorCode (*)(PC,PCSide,Vec,Vec,Vec));
188: PETSC_EXTERN PetscErrorCode PCShellSetApplyTranspose(PC,PetscErrorCode (*)(PC,Vec,Vec));
189: PETSC_EXTERN PetscErrorCode PCShellSetSetUp(PC,PetscErrorCode (*)(PC));
190: PETSC_EXTERN PetscErrorCode PCShellSetApplyRichardson(PC,PetscErrorCode (*)(PC,Vec,Vec,Vec,PetscReal,PetscReal,PetscReal,PetscInt,PetscBool ,PetscInt*,PCRichardsonConvergedReason*));
191: PETSC_EXTERN PetscErrorCode PCShellSetView(PC,PetscErrorCode (*)(PC,PetscViewer));
192: PETSC_EXTERN PetscErrorCode PCShellSetDestroy(PC,PetscErrorCode (*)(PC));
193: PETSC_EXTERN PetscErrorCode PCShellGetContext(PC,void**);
194: PETSC_EXTERN PetscErrorCode PCShellSetContext(PC,void*);
195: PETSC_EXTERN PetscErrorCode PCShellSetName(PC,const char[]);
196: PETSC_EXTERN PetscErrorCode PCShellGetName(PC,const char*[]);

198: PETSC_EXTERN PetscErrorCode PCFactorSetZeroPivot(PC,PetscReal);

200: PETSC_EXTERN PetscErrorCode PCFactorSetShiftType(PC,MatFactorShiftType);
201: PETSC_EXTERN PetscErrorCode PCFactorSetShiftAmount(PC,PetscReal);

203: PETSC_EXTERN PetscErrorCode PCFactorSetMatSolverPackage(PC,const MatSolverPackage);
204: PETSC_EXTERN PetscErrorCode PCFactorGetMatSolverPackage(PC,const MatSolverPackage*);
205: PETSC_EXTERN PetscErrorCode PCFactorSetUpMatSolverPackage(PC);

207: PETSC_EXTERN PetscErrorCode PCFactorSetFill(PC,PetscReal);
208: PETSC_EXTERN PetscErrorCode PCFactorSetColumnPivot(PC,PetscReal);
209: PETSC_EXTERN PetscErrorCode PCFactorReorderForNonzeroDiagonal(PC,PetscReal);

211: PETSC_EXTERN PetscErrorCode PCFactorSetMatOrderingType(PC,MatOrderingType);
212: PETSC_EXTERN PetscErrorCode PCFactorSetReuseOrdering(PC,PetscBool );
213: PETSC_EXTERN PetscErrorCode PCFactorSetReuseFill(PC,PetscBool );
214: PETSC_EXTERN PetscErrorCode PCFactorSetUseInPlace(PC);
215: PETSC_EXTERN PetscErrorCode PCFactorSetAllowDiagonalFill(PC);
216: PETSC_EXTERN PetscErrorCode PCFactorSetPivotInBlocks(PC,PetscBool );

218: PETSC_EXTERN PetscErrorCode PCFactorGetLevels(PC,PetscInt*);
219: PETSC_EXTERN PetscErrorCode PCFactorSetLevels(PC,PetscInt);
220: PETSC_EXTERN PetscErrorCode PCFactorSetDropTolerance(PC,PetscReal,PetscReal,PetscInt);

222: PETSC_EXTERN PetscErrorCode PCASMSetLocalSubdomains(PC,PetscInt,IS[],IS[]);
223: PETSC_EXTERN PetscErrorCode PCASMSetTotalSubdomains(PC,PetscInt,IS[],IS[]);
224: PETSC_EXTERN PetscErrorCode PCASMSetOverlap(PC,PetscInt);
225: PETSC_EXTERN PetscErrorCode PCASMSetDMSubdomains(PC,PetscBool);
226: PETSC_EXTERN PetscErrorCode PCASMGetDMSubdomains(PC,PetscBool*);
227: PETSC_EXTERN PetscErrorCode PCASMSetSortIndices(PC,PetscBool );

229: /*E
230:     PCASMType - Type of additive Schwarz method to use

232: $  PC_ASM_BASIC        - Symmetric version where residuals from the ghost points are used
233: $                        and computed values in ghost regions are added together.
234: $                        Classical standard additive Schwarz.
235: $  PC_ASM_RESTRICT     - Residuals from ghost points are used but computed values in ghost
236: $                        region are discarded.
237: $                        Default.
238: $  PC_ASM_INTERPOLATE  - Residuals from ghost points are not used, computed values in ghost
239: $                        region are added back in.
240: $  PC_ASM_NONE         - Residuals from ghost points are not used, computed ghost values are
241: $                        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;
249: PETSC_EXTERN const char *const PCASMTypes[];

251: PETSC_EXTERN PetscErrorCode PCASMSetType(PC,PCASMType);
252: PETSC_EXTERN PetscErrorCode PCASMCreateSubdomains(Mat,PetscInt,IS*[]);
253: PETSC_EXTERN PetscErrorCode PCASMDestroySubdomains(PetscInt,IS[],IS[]);
254: PETSC_EXTERN PetscErrorCode PCASMCreateSubdomains2D(PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt*,IS**,IS**);
255: PETSC_EXTERN PetscErrorCode PCASMGetLocalSubdomains(PC,PetscInt*,IS*[],IS*[]);
256: PETSC_EXTERN PetscErrorCode PCASMGetLocalSubmatrices(PC,PetscInt*,Mat*[]);

258: /*E
259:     PCGASMType - Type of generalized additive Schwarz method to use (differs from ASM in allowing multiple processors per subdomain).

261:    Each subdomain has nested inner and outer parts.  The inner subdomains are assumed to form a non-overlapping covering of the computational
262:    domain, while the outer subdomains contain the inner subdomains and overlap with each other.  This preconditioner will compute
263:    a subdomain correction over each *outer* subdomain from a residual computed there, but its different variants will differ in
264:    (a) how the outer subdomain residual is computed, and (b) how the outer subdomain correction is computed.

266: $  PC_GASM_BASIC       - Symmetric version where the full from the outer subdomain is used, and the resulting correction is applied
267: $                        over the outer subdomains.  As a result, points in the overlap will receive the sum of the corrections
268: $                        from neighboring subdomains.
269: $                        Classical standard additive Schwarz.
270: $  PC_GASM_RESTRICT    - Residual from the outer subdomain is used but the correction is restricted to the inner subdomain only
271: $                        (i.e., zeroed out over the overlap portion of the outer subdomain before being applied).  As a result,
272: $                        each point will receive a correction only from the unique inner subdomain containing it (nonoverlapping covering
273: $                        assumption).
274: $                        Default.
275: $  PC_GASM_INTERPOLATE - Residual is zeroed out over the overlap portion of the outer subdomain, but the resulting correction is
276: $                        applied over the outer subdomain. As a result, points in the overlap will receive the sum of the corrections
277: $                        from neighboring subdomains.
278: $
279: $  PC_GASM_NONE        - Residuals and corrections are zeroed out outside the local subdomains.
280: $                        Not very good.

282:    Level: beginner

284: .seealso: PCGASMSetType()
285: E*/
286: typedef enum {PC_GASM_BASIC = 3,PC_GASM_RESTRICT = 1,PC_GASM_INTERPOLATE = 2,PC_GASM_NONE = 0} PCGASMType;
287: PETSC_EXTERN const char *const PCGASMTypes[];

289: PETSC_EXTERN PetscErrorCode PCGASMSetSubdomains(PC,PetscInt,IS[],IS[]);
290: PETSC_EXTERN PetscErrorCode PCGASMSetTotalSubdomains(PC,PetscInt,PetscBool);
291: PETSC_EXTERN PetscErrorCode PCGASMSetOverlap(PC,PetscInt);
292: PETSC_EXTERN PetscErrorCode PCGASMSetDMSubdomains(PC,PetscBool);
293: PETSC_EXTERN PetscErrorCode PCGASMGetDMSubdomains(PC,PetscBool*);
294: PETSC_EXTERN PetscErrorCode PCGASMSetSortIndices(PC,PetscBool );

296: PETSC_EXTERN PetscErrorCode PCGASMSetType(PC,PCGASMType);
297: PETSC_EXTERN PetscErrorCode PCGASMCreateLocalSubdomains(Mat,PetscInt,PetscInt,IS*[],IS*[]);
298: PETSC_EXTERN PetscErrorCode PCGASMDestroySubdomains(PetscInt,IS[],IS[]);
299: PETSC_EXTERN PetscErrorCode PCGASMCreateSubdomains2D(PC,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt*,IS**,IS**);
300: PETSC_EXTERN PetscErrorCode PCGASMGetSubdomains(PC,PetscInt*,IS*[],IS*[]);
301: PETSC_EXTERN PetscErrorCode PCGASMGetSubmatrices(PC,PetscInt*,Mat*[]);

303: /*E
304:     PCCompositeType - Determines how two or more preconditioner are composed

306: $  PC_COMPOSITE_ADDITIVE - results from application of all preconditioners are added together
307: $  PC_COMPOSITE_MULTIPLICATIVE - preconditioners are applied sequentially to the residual freshly
308: $                                computed after the previous preconditioner application
309: $  PC_COMPOSITE_SYMMETRIC_MULTIPLICATIVE - preconditioners are applied sequentially to the residual freshly
310: $                                computed from first preconditioner to last and then back (Use only for symmetric matrices and preconditions)
311: $  PC_COMPOSITE_SPECIAL - This is very special for a matrix of the form alpha I + R + S
312: $                         where first preconditioner is built from alpha I + S and second from
313: $                         alpha I + R

315:    Level: beginner

317: .seealso: PCCompositeSetType()
318: E*/
319: typedef enum {PC_COMPOSITE_ADDITIVE,PC_COMPOSITE_MULTIPLICATIVE,PC_COMPOSITE_SYMMETRIC_MULTIPLICATIVE,PC_COMPOSITE_SPECIAL,PC_COMPOSITE_SCHUR} PCCompositeType;
320: PETSC_EXTERN const char *const PCCompositeTypes[];

322: PETSC_EXTERN PetscErrorCode PCCompositeSetType(PC,PCCompositeType);
323: PETSC_EXTERN PetscErrorCode PCCompositeAddPC(PC,PCType);
324: PETSC_EXTERN PetscErrorCode PCCompositeGetPC(PC,PetscInt,PC *);
325: PETSC_EXTERN PetscErrorCode PCCompositeSpecialSetAlpha(PC,PetscScalar);

327: PETSC_EXTERN PetscErrorCode PCRedundantSetNumber(PC,PetscInt);
328: PETSC_EXTERN PetscErrorCode PCRedundantSetScatter(PC,VecScatter,VecScatter);
329: PETSC_EXTERN PetscErrorCode PCRedundantGetOperators(PC,Mat*,Mat*);

331: PETSC_EXTERN PetscErrorCode PCSPAISetEpsilon(PC,double);
332: PETSC_EXTERN PetscErrorCode PCSPAISetNBSteps(PC,PetscInt);
333: PETSC_EXTERN PetscErrorCode PCSPAISetMax(PC,PetscInt);
334: PETSC_EXTERN PetscErrorCode PCSPAISetMaxNew(PC,PetscInt);
335: PETSC_EXTERN PetscErrorCode PCSPAISetBlockSize(PC,PetscInt);
336: PETSC_EXTERN PetscErrorCode PCSPAISetCacheSize(PC,PetscInt);
337: PETSC_EXTERN PetscErrorCode PCSPAISetVerbose(PC,PetscInt);
338: PETSC_EXTERN PetscErrorCode PCSPAISetSp(PC,PetscInt);

340: PETSC_EXTERN PetscErrorCode PCHYPRESetType(PC,const char[]);
341: PETSC_EXTERN PetscErrorCode PCHYPREGetType(PC,const char*[]);
342: PETSC_EXTERN PetscErrorCode PCBJacobiGetLocalBlocks(PC,PetscInt*,const PetscInt*[]);
343: PETSC_EXTERN PetscErrorCode PCBJacobiGetTotalBlocks(PC,PetscInt*,const PetscInt*[]);

345: PETSC_EXTERN PetscErrorCode PCFieldSplitSetFields(PC,const char[],PetscInt,const PetscInt*,const PetscInt*);
346: PETSC_EXTERN PetscErrorCode PCFieldSplitGetType(PC,PCCompositeType*);
347: PETSC_EXTERN PetscErrorCode PCFieldSplitSetType(PC,PCCompositeType);
348: PETSC_EXTERN PetscErrorCode PCFieldSplitSetBlockSize(PC,PetscInt);
349: PETSC_EXTERN PetscErrorCode PCFieldSplitSetIS(PC,const char[],IS);
350: PETSC_EXTERN PetscErrorCode PCFieldSplitGetIS(PC,const char[],IS*);
351: PETSC_EXTERN PetscErrorCode PCFieldSplitSetDMSplits(PC,PetscBool);
352: PETSC_EXTERN PetscErrorCode PCFieldSplitGetDMSplits(PC,PetscBool*);

354: /*E
355:     PCFieldSplitSchurPreType - Determines how to precondition Schur complement

357:     Level: intermediate

359: .seealso: PCFieldSplitSchurPrecondition()
360: E*/
361: typedef enum {PC_FIELDSPLIT_SCHUR_PRE_SELF,PC_FIELDSPLIT_SCHUR_PRE_A11,PC_FIELDSPLIT_SCHUR_PRE_USER} PCFieldSplitSchurPreType;
362: PETSC_EXTERN const char *const PCFieldSplitSchurPreTypes[];

364: /*E
365:     PCFieldSplitSchurFactType - determines which off-diagonal parts of the approximate block factorization to use

367:     Level: intermediate

369: .seealso: PCFieldSplitSetSchurFactType()
370: E*/
371: typedef enum {
372:   PC_FIELDSPLIT_SCHUR_FACT_DIAG,
373:   PC_FIELDSPLIT_SCHUR_FACT_LOWER,
374:   PC_FIELDSPLIT_SCHUR_FACT_UPPER,
375:   PC_FIELDSPLIT_SCHUR_FACT_FULL
376: } PCFieldSplitSchurFactType;
377: PETSC_EXTERN const char *const PCFieldSplitSchurFactTypes[];

379: PETSC_EXTERN PetscErrorCode PCFieldSplitSchurPrecondition(PC,PCFieldSplitSchurPreType,Mat);
380: PETSC_EXTERN PetscErrorCode PCFieldSplitSetSchurFactType(PC,PCFieldSplitSchurFactType);
381: PETSC_EXTERN PetscErrorCode PCFieldSplitGetSchurBlocks(PC,Mat*,Mat*,Mat*,Mat*);

383: PETSC_EXTERN PetscErrorCode PCGalerkinSetRestriction(PC,Mat);
384: PETSC_EXTERN PetscErrorCode PCGalerkinSetInterpolation(PC,Mat);

386: PETSC_EXTERN PetscErrorCode PCSetCoordinates(PC,PetscInt,PetscInt,PetscReal*);
387: PETSC_EXTERN PetscErrorCode PCSASetVectors(PC,PetscInt,PetscReal *);

389: PETSC_EXTERN PetscErrorCode PCPythonSetType(PC,const char[]);

391: PETSC_EXTERN PetscErrorCode PCSetDM(PC,DM);
392: PETSC_EXTERN PetscErrorCode PCGetDM(PC,DM*);

394: PETSC_EXTERN PetscErrorCode PCSetApplicationContext(PC,void*);
395: PETSC_EXTERN PetscErrorCode PCGetApplicationContext(PC,void*);

397: PETSC_EXTERN PetscErrorCode PCBiCGStabCUSPSetTolerance(PC,PetscReal);
398: PETSC_EXTERN PetscErrorCode PCBiCGStabCUSPSetIterations(PC,PetscInt);
399: PETSC_EXTERN PetscErrorCode PCBiCGStabCUSPSetUseVerboseMonitor(PC,PetscBool);

401: PETSC_EXTERN PetscErrorCode PCAINVCUSPSetDropTolerance(PC,PetscReal);
402: PETSC_EXTERN PetscErrorCode PCAINVCUSPUseScaling(PC,PetscBool);
403: PETSC_EXTERN PetscErrorCode PCAINVCUSPSetNonzeros(PC,PetscInt);
404: PETSC_EXTERN PetscErrorCode PCAINVCUSPSetLinParameter(PC,PetscInt);
405: /*E
406:     PCPARMSGlobalType - Determines the global preconditioner method in PARMS

408:     Level: intermediate

410: .seealso: PCPARMSSetGlobal()
411: E*/
412: typedef enum {PC_PARMS_GLOBAL_RAS,PC_PARMS_GLOBAL_SCHUR,PC_PARMS_GLOBAL_BJ} PCPARMSGlobalType;
413: PETSC_EXTERN const char *const PCPARMSGlobalTypes[];
414: /*E
415:     PCPARMSLocalType - Determines the local preconditioner method in PARMS

417:     Level: intermediate

419: .seealso: PCPARMSSetLocal()
420: E*/
421: typedef enum {PC_PARMS_LOCAL_ILU0,PC_PARMS_LOCAL_ILUK,PC_PARMS_LOCAL_ILUT,PC_PARMS_LOCAL_ARMS} PCPARMSLocalType;
422: PETSC_EXTERN const char *const PCPARMSLocalTypes[];

424: PETSC_EXTERN PetscErrorCode PCPARMSSetGlobal(PC pc,PCPARMSGlobalType type);
425: PETSC_EXTERN PetscErrorCode PCPARMSSetLocal(PC pc,PCPARMSLocalType type);
426: PETSC_EXTERN PetscErrorCode PCPARMSSetSolveTolerances(PC pc,PetscReal tol,PetscInt maxits);
427: PETSC_EXTERN PetscErrorCode PCPARMSSetSolveRestart(PC pc,PetscInt restart);
428: PETSC_EXTERN PetscErrorCode PCPARMSSetNonsymPerm(PC pc,PetscBool nonsym);
429: PETSC_EXTERN PetscErrorCode PCPARMSSetFill(PC pc,PetscInt lfil0,PetscInt lfil1,PetscInt lfil2);

431: /*E
432:     PCGAMGType - type of generalized algebraic multigrid (PCGAMG) method

434:     Level: intermediate

436: .seealso: PCMG, PCSetType(), PCGAMGSetThreshold(), PCGAMGSetThreshold(), PCGAMGSetReuseProl()
437: E*/
438: typedef const char *PCGAMGType;
439: #define PCGAMGAGG         "agg"
440: #define PCGAMGGEO         "geo"
441: PETSC_EXTERN PetscErrorCode PCGAMGSetProcEqLim(PC,PetscInt);
442: PETSC_EXTERN PetscErrorCode PCGAMGSetRepartitioning(PC,PetscBool);
443: PETSC_EXTERN PetscErrorCode PCGAMGSetUseASMAggs(PC,PetscBool);
444: PETSC_EXTERN PetscErrorCode PCGAMGSetSolverType(PC,char[],PetscInt);
445: PETSC_EXTERN PetscErrorCode PCGAMGSetThreshold(PC,PetscReal);
446: PETSC_EXTERN PetscErrorCode PCGAMGSetCoarseEqLim(PC,PetscInt);
447: PETSC_EXTERN PetscErrorCode PCGAMGSetNlevels(PC,PetscInt);
448: PETSC_EXTERN PetscErrorCode PCGAMGSetType( PC,PCGAMGType );
449: PETSC_EXTERN PetscErrorCode PCGAMGSetNSmooths(PC pc, PetscInt n);
450: PETSC_EXTERN PetscErrorCode PCGAMGSetSymGraph(PC pc, PetscBool n);
451: PETSC_EXTERN PetscErrorCode PCGAMGSetSquareGraph(PC,PetscBool);
452: PETSC_EXTERN PetscErrorCode PCGAMGSetReuseProl(PC,PetscBool);
453: PETSC_EXTERN PetscErrorCode PCGAMGFinalizePackage(void);
454: PETSC_EXTERN PetscErrorCode PCGAMGInitializePackage(void);

456: #if defined(PETSC_HAVE_PCBDDC)
457: /* Enum defining how to treat the coarse problem */
458: typedef enum {SEQUENTIAL_BDDC,REPLICATED_BDDC,PARALLEL_BDDC,MULTILEVEL_BDDC} CoarseProblemType;
459: PETSC_EXTERN PetscErrorCode PCBDDCSetCoarseningRatio(PC,PetscInt);
460: PETSC_EXTERN PetscErrorCode PCBDDCSetMaxLevels(PC,PetscInt);
461: PETSC_EXTERN PetscErrorCode PCBDDCSetNullSpace(PC,MatNullSpace);
462: PETSC_EXTERN PetscErrorCode PCBDDCSetDirichletBoundaries(PC,IS);
463: PETSC_EXTERN PetscErrorCode PCBDDCGetDirichletBoundaries(PC,IS*);
464: PETSC_EXTERN PetscErrorCode PCBDDCSetNeumannBoundaries(PC,IS);
465: PETSC_EXTERN PetscErrorCode PCBDDCGetNeumannBoundaries(PC,IS*);
466: PETSC_EXTERN PetscErrorCode PCBDDCSetCoarseProblemType(PC,CoarseProblemType);
467: PETSC_EXTERN PetscErrorCode PCBDDCSetDofsSplitting(PC,PetscInt,IS[]);
468: PETSC_EXTERN PetscErrorCode PCBDDCSetLocalAdjacencyGraph(PC,PetscInt,const PetscInt[],const PetscInt[],PetscCopyMode);
469: PETSC_EXTERN PetscErrorCode PCBDDCCreateFETIDPOperators(PC,Mat*,PC*);
470: PETSC_EXTERN PetscErrorCode PCBDDCMatFETIDPGetRHS(Mat,Vec,Vec);
471: PETSC_EXTERN PetscErrorCode PCBDDCMatFETIDPGetSolution(Mat,Vec,Vec);
472: #endif

474: PETSC_EXTERN PetscErrorCode PCISSetUseStiffnessScaling(PC,PetscBool);
475: PETSC_EXTERN PetscErrorCode PCISSetSubdomainScalingFactor(PC,PetscScalar);
476: PETSC_EXTERN PetscErrorCode PCISSetSubdomainDiagonalScaling(PC,Vec);

478: /*E
479:     PCMGType - Determines the type of multigrid method that is run.

481:    Level: beginner

483:    Values:
484: +  PC_MG_MULTIPLICATIVE (default) - traditional V or W cycle as determined by PCMGSetCycles()
485: .  PC_MG_ADDITIVE - the additive multigrid preconditioner where all levels are
486:                 smoothed before updating the residual. This only uses the
487:                 down smoother, in the preconditioner the upper smoother is ignored
488: .  PC_MG_FULL - same as multiplicative except one also performs grid sequencing,
489:             that is starts on the coarsest grid, performs a cycle, interpolates
490:             to the next, performs a cycle etc. This is much like the F-cycle presented in "Multigrid" by Trottenberg, Oosterlee, Schuller page 49, but that
491:             algorithm supports smoothing on before the restriction on each level in the initial restriction to the coarsest stage. In addition that algorithm
492:             calls the V-cycle only on the coarser level and has a post-smoother instead.
493: -  PC_MG_KASKADE - like full multigrid except one never goes back to a coarser level
494:                from a finer

496: .seealso: PCMGSetType()

498: E*/
499: typedef enum { PC_MG_MULTIPLICATIVE,PC_MG_ADDITIVE,PC_MG_FULL,PC_MG_KASKADE } PCMGType;
500: PETSC_EXTERN const char *const PCMGTypes[];
501: #define PC_MG_CASCADE PC_MG_KASKADE;

503: /*E
504:     PCMGCycleType - Use V-cycle or W-cycle

506:    Level: beginner

508:    Values:
509: +  PC_MG_V_CYCLE
510: -  PC_MG_W_CYCLE

512: .seealso: PCMGSetCycleType()

514: E*/
515: typedef enum { PC_MG_CYCLE_V = 1,PC_MG_CYCLE_W = 2 } PCMGCycleType;
516: PETSC_EXTERN const char *const PCMGCycleTypes[];

518: PETSC_EXTERN PetscErrorCode PCMGSetType(PC,PCMGType);
519: PETSC_EXTERN PetscErrorCode PCMGSetLevels(PC,PetscInt,MPI_Comm*);
520: PETSC_EXTERN PetscErrorCode PCMGGetLevels(PC,PetscInt*);

522: PETSC_EXTERN PetscErrorCode PCMGSetNumberSmoothUp(PC,PetscInt);
523: PETSC_EXTERN PetscErrorCode PCMGSetNumberSmoothDown(PC,PetscInt);
524: PETSC_EXTERN PetscErrorCode PCMGSetCycleType(PC,PCMGCycleType);
525: PETSC_EXTERN PetscErrorCode PCMGSetCycleTypeOnLevel(PC,PetscInt,PCMGCycleType);
526: PETSC_EXTERN PetscErrorCode PCMGSetCyclesOnLevel(PC,PetscInt,PetscInt);
527: PETSC_EXTERN PetscErrorCode PCMGMultiplicativeSetCycles(PC,PetscInt);
528: PETSC_EXTERN PetscErrorCode PCMGSetGalerkin(PC,PetscBool);
529: PETSC_EXTERN PetscErrorCode PCMGGetGalerkin(PC,PetscBool*);


532: PETSC_EXTERN PetscErrorCode PCMGSetRhs(PC,PetscInt,Vec);
533: PETSC_EXTERN PetscErrorCode PCMGSetX(PC,PetscInt,Vec);
534: PETSC_EXTERN PetscErrorCode PCMGSetR(PC,PetscInt,Vec);

536: PETSC_EXTERN PetscErrorCode PCMGSetRestriction(PC,PetscInt,Mat);
537: PETSC_EXTERN PetscErrorCode PCMGGetRestriction(PC,PetscInt,Mat*);
538: PETSC_EXTERN PetscErrorCode PCMGSetInterpolation(PC,PetscInt,Mat);
539: PETSC_EXTERN PetscErrorCode PCMGGetInterpolation(PC,PetscInt,Mat*);
540: PETSC_EXTERN PetscErrorCode PCMGSetRScale(PC,PetscInt,Vec);
541: PETSC_EXTERN PetscErrorCode PCMGGetRScale(PC,PetscInt,Vec*);
542: PETSC_EXTERN PetscErrorCode PCMGSetResidual(PC,PetscInt,PetscErrorCode (*)(Mat,Vec,Vec,Vec),Mat);

544: /*E
545:     PCExoticType - Face based or wirebasket based coarse grid space

547:    Level: beginner

549: .seealso: PCExoticSetType(), PCEXOTIC
550: E*/
551: typedef enum { PC_EXOTIC_FACE,PC_EXOTIC_WIREBASKET } PCExoticType;
552: PETSC_EXTERN const char *const PCExoticTypes[];
553: PETSC_EXTERN PetscErrorCode PCExoticSetType(PC,PCExoticType);

555: #endif /* __PETSCPC_H */