1 /* 2 Defines the interface functions for the Krylov subspace accelerators. 3 */ 4 #ifndef __PETSCKSP_H 5 #define __PETSCKSP_H 6 #include "petscpc.h" 7 PETSC_EXTERN_CXX_BEGIN 8 9 extern PetscErrorCode KSPInitializePackage(const char[]); 10 11 /*S 12 KSP - Abstract PETSc object that manages all Krylov methods 13 14 Level: beginner 15 16 Concepts: Krylov methods 17 18 .seealso: KSPCreate(), KSPSetType(), KSPType, SNES, TS, PC, KSP 19 S*/ 20 typedef struct _p_KSP* KSP; 21 22 /*J 23 KSPType - String with the name of a PETSc Krylov method or the creation function 24 with an optional dynamic library name, for example 25 http://www.mcs.anl.gov/petsc/lib.a:mykspcreate() 26 27 Level: beginner 28 29 .seealso: KSPSetType(), KSP 30 J*/ 31 #define KSPType char* 32 #define KSPRICHARDSON "richardson" 33 #define KSPCHEBYCHEV "chebychev" 34 #define KSPCG "cg" 35 #define KSPCGNE "cgne" 36 #define KSPNASH "nash" 37 #define KSPSTCG "stcg" 38 #define KSPGLTR "gltr" 39 #define KSPGMRES "gmres" 40 #define KSPFGMRES "fgmres" 41 #define KSPLGMRES "lgmres" 42 #define KSPDGMRES "dgmres" 43 #define KSPPGMRES "pgmres" 44 #define KSPTCQMR "tcqmr" 45 #define KSPBCGS "bcgs" 46 #define KSPIBCGS "ibcgs" 47 #define KSPBCGSL "bcgsl" 48 #define KSPCGS "cgs" 49 #define KSPTFQMR "tfqmr" 50 #define KSPCR "cr" 51 #define KSPLSQR "lsqr" 52 #define KSPPREONLY "preonly" 53 #define KSPQCG "qcg" 54 #define KSPBICG "bicg" 55 #define KSPMINRES "minres" 56 #define KSPSYMMLQ "symmlq" 57 #define KSPLCD "lcd" 58 #define KSPPYTHON "python" 59 #define KSPBROYDEN "broyden" 60 #define KSPGCR "gcr" 61 #define KSPSPECEST "specest" 62 63 /* Logging support */ 64 extern PetscClassId KSP_CLASSID; 65 66 extern PetscErrorCode KSPCreate(MPI_Comm,KSP *); 67 extern PetscErrorCode KSPSetType(KSP,const KSPType); 68 extern PetscErrorCode KSPSetUp(KSP); 69 extern PetscErrorCode KSPSetUpOnBlocks(KSP); 70 extern PetscErrorCode KSPSolve(KSP,Vec,Vec); 71 extern PetscErrorCode KSPSolveTranspose(KSP,Vec,Vec); 72 extern PetscErrorCode KSPReset(KSP); 73 extern PetscErrorCode KSPDestroy(KSP*); 74 75 extern PetscFList KSPList; 76 extern PetscBool KSPRegisterAllCalled; 77 extern PetscErrorCode KSPRegisterAll(const char[]); 78 extern PetscErrorCode KSPRegisterDestroy(void); 79 extern PetscErrorCode KSPRegister(const char[],const char[],const char[],PetscErrorCode (*)(KSP)); 80 81 /*MC 82 KSPRegisterDynamic - Adds a method to the Krylov subspace solver package. 83 84 Synopsis: 85 PetscErrorCode KSPRegisterDynamic(const char *name_solver,const char *path,const char *name_create,PetscErrorCode (*routine_create)(KSP)) 86 87 Not Collective 88 89 Input Parameters: 90 + name_solver - name of a new user-defined solver 91 . path - path (either absolute or relative) the library containing this solver 92 . name_create - name of routine to create method context 93 - routine_create - routine to create method context 94 95 Notes: 96 KSPRegisterDynamic() may be called multiple times to add several user-defined solvers. 97 98 If dynamic libraries are used, then the fourth input argument (routine_create) 99 is ignored. 100 101 Sample usage: 102 .vb 103 KSPRegisterDynamic("my_solver",/home/username/my_lib/lib/libO/solaris/mylib.a, 104 "MySolverCreate",MySolverCreate); 105 .ve 106 107 Then, your solver can be chosen with the procedural interface via 108 $ KSPSetType(ksp,"my_solver") 109 or at runtime via the option 110 $ -ksp_type my_solver 111 112 Level: advanced 113 114 Notes: Environmental variables such as ${PETSC_ARCH}, ${PETSC_DIR}, ${PETSC_LIB_DIR}, 115 and others of the form ${any_environmental_variable} occuring in pathname will be 116 replaced with appropriate values. 117 If your function is not being put into a shared library then use KSPRegister() instead 118 119 .keywords: KSP, register 120 121 .seealso: KSPRegisterAll(), KSPRegisterDestroy() 122 123 M*/ 124 #if defined(PETSC_USE_DYNAMIC_LIBRARIES) 125 #define KSPRegisterDynamic(a,b,c,d) KSPRegister(a,b,c,0) 126 #else 127 #define KSPRegisterDynamic(a,b,c,d) KSPRegister(a,b,c,d) 128 #endif 129 130 extern PetscErrorCode KSPGetType(KSP,const KSPType *); 131 extern PetscErrorCode KSPSetPCSide(KSP,PCSide); 132 extern PetscErrorCode KSPGetPCSide(KSP,PCSide*); 133 extern PetscErrorCode KSPGetTolerances(KSP,PetscReal*,PetscReal*,PetscReal*,PetscInt*); 134 extern PetscErrorCode KSPSetTolerances(KSP,PetscReal,PetscReal,PetscReal,PetscInt); 135 extern PetscErrorCode KSPSetInitialGuessNonzero(KSP,PetscBool ); 136 extern PetscErrorCode KSPGetInitialGuessNonzero(KSP,PetscBool *); 137 extern PetscErrorCode KSPSetInitialGuessKnoll(KSP,PetscBool ); 138 extern PetscErrorCode KSPGetInitialGuessKnoll(KSP,PetscBool *); 139 extern PetscErrorCode KSPSetErrorIfNotConverged(KSP,PetscBool ); 140 extern PetscErrorCode KSPGetErrorIfNotConverged(KSP,PetscBool *); 141 extern PetscErrorCode KSPGetComputeEigenvalues(KSP,PetscBool *); 142 extern PetscErrorCode KSPSetComputeEigenvalues(KSP,PetscBool ); 143 extern PetscErrorCode KSPGetComputeSingularValues(KSP,PetscBool *); 144 extern PetscErrorCode KSPSetComputeSingularValues(KSP,PetscBool ); 145 extern PetscErrorCode KSPGetRhs(KSP,Vec *); 146 extern PetscErrorCode KSPGetSolution(KSP,Vec *); 147 extern PetscErrorCode KSPGetResidualNorm(KSP,PetscReal*); 148 extern PetscErrorCode KSPGetIterationNumber(KSP,PetscInt*); 149 extern PetscErrorCode KSPSetNullSpace(KSP,MatNullSpace); 150 extern PetscErrorCode KSPGetNullSpace(KSP,MatNullSpace*); 151 extern PetscErrorCode KSPGetVecs(KSP,PetscInt,Vec**,PetscInt,Vec**); 152 153 extern PetscErrorCode KSPSetPC(KSP,PC); 154 extern PetscErrorCode KSPGetPC(KSP,PC*); 155 156 extern PetscErrorCode KSPMonitor(KSP,PetscInt,PetscReal); 157 extern PetscErrorCode KSPMonitorSet(KSP,PetscErrorCode (*)(KSP,PetscInt,PetscReal,void*),void *,PetscErrorCode (*)(void**)); 158 extern PetscErrorCode KSPMonitorCancel(KSP); 159 extern PetscErrorCode KSPGetMonitorContext(KSP,void **); 160 extern PetscErrorCode KSPGetResidualHistory(KSP,PetscReal*[],PetscInt *); 161 extern PetscErrorCode KSPSetResidualHistory(KSP,PetscReal[],PetscInt,PetscBool ); 162 163 /* not sure where to put this */ 164 extern PetscErrorCode PCKSPGetKSP(PC,KSP*); 165 extern PetscErrorCode PCBJacobiGetSubKSP(PC,PetscInt*,PetscInt*,KSP*[]); 166 extern PetscErrorCode PCASMGetSubKSP(PC,PetscInt*,PetscInt*,KSP*[]); 167 extern PetscErrorCode PCGASMGetSubKSP(PC,PetscInt*,PetscInt*,KSP*[]); 168 extern PetscErrorCode PCFieldSplitGetSubKSP(PC,PetscInt*,KSP*[]); 169 170 extern PetscErrorCode PCGalerkinGetKSP(PC,KSP *); 171 172 extern PetscErrorCode KSPBuildSolution(KSP,Vec,Vec *); 173 extern PetscErrorCode KSPBuildResidual(KSP,Vec,Vec,Vec *); 174 175 extern PetscErrorCode KSPRichardsonSetScale(KSP,PetscReal); 176 extern PetscErrorCode KSPRichardsonSetSelfScale(KSP,PetscBool ); 177 extern PetscErrorCode KSPChebychevSetEigenvalues(KSP,PetscReal,PetscReal); 178 extern PetscErrorCode KSPChebychevSetEstimateEigenvalues(KSP,PetscReal,PetscReal,PetscReal,PetscReal); 179 extern PetscErrorCode KSPChebychevSetNewMatrix(KSP); 180 extern PetscErrorCode KSPComputeExtremeSingularValues(KSP,PetscReal*,PetscReal*); 181 extern PetscErrorCode KSPComputeEigenvalues(KSP,PetscInt,PetscReal*,PetscReal*,PetscInt *); 182 extern PetscErrorCode KSPComputeEigenvaluesExplicitly(KSP,PetscInt,PetscReal*,PetscReal*); 183 184 extern PetscErrorCode KSPGMRESSetRestart(KSP, PetscInt); 185 extern PetscErrorCode KSPGMRESGetRestart(KSP, PetscInt*); 186 extern PetscErrorCode KSPGMRESSetHapTol(KSP,PetscReal); 187 188 extern PetscErrorCode KSPGMRESSetPreAllocateVectors(KSP); 189 extern PetscErrorCode KSPGMRESSetOrthogonalization(KSP,PetscErrorCode (*)(KSP,PetscInt)); 190 extern PetscErrorCode KSPGMRESGetOrthogonalization(KSP,PetscErrorCode (**)(KSP,PetscInt)); 191 extern PetscErrorCode KSPGMRESModifiedGramSchmidtOrthogonalization(KSP,PetscInt); 192 extern PetscErrorCode KSPGMRESClassicalGramSchmidtOrthogonalization(KSP,PetscInt); 193 194 extern PetscErrorCode KSPLGMRESSetAugDim(KSP,PetscInt); 195 extern PetscErrorCode KSPLGMRESSetConstant(KSP); 196 197 extern PetscErrorCode KSPGCRSetRestart(KSP,PetscInt); 198 extern PetscErrorCode KSPGCRGetRestart(KSP,PetscInt*); 199 extern PetscErrorCode KSPGCRSetModifyPC(KSP,PetscErrorCode (*)(KSP,PetscInt,PetscReal,void*),void*,PetscErrorCode(*)(void*)); 200 201 /*E 202 KSPGMRESCGSRefinementType - How the classical (unmodified) Gram-Schmidt is performed. 203 204 Level: advanced 205 206 .seealso: KSPGMRESClassicalGramSchmidtOrthogonalization(), KSPGMRESSetOrthogonalization(), KSPGMRESGetOrthogonalization(), 207 KSPGMRESSetCGSRefinementType(), KSPGMRESGetCGSRefinementType(), KSPGMRESModifiedGramSchmidtOrthogonalization() 208 209 E*/ 210 typedef enum {KSP_GMRES_CGS_REFINE_NEVER, KSP_GMRES_CGS_REFINE_IFNEEDED, KSP_GMRES_CGS_REFINE_ALWAYS} KSPGMRESCGSRefinementType; 211 extern const char *KSPGMRESCGSRefinementTypes[]; 212 /*MC 213 KSP_GMRES_CGS_REFINE_NEVER - Just do the classical (unmodified) Gram-Schmidt process 214 215 Level: advanced 216 217 Note: Possible unstable, but the fastest to compute 218 219 .seealso: KSPGMRESClassicalGramSchmidtOrthogonalization(), KSPGMRESSetOrthogonalization(), KSPGMRESGetOrthogonalization(), 220 KSPGMRESSetCGSRefinementType(), KSPGMRESGetCGSRefinementType(), KSP_GMRES_CGS_REFINE_IFNEEDED, KSP_GMRES_CGS_REFINE_ALWAYS, 221 KSPGMRESModifiedGramSchmidtOrthogonalization() 222 M*/ 223 224 /*MC 225 KSP_GMRES_CGS_REFINE_IFNEEDED - Do the classical (unmodified) Gram-Schmidt process and one step of 226 iterative refinement if an estimate of the orthogonality of the resulting vectors indicates 227 poor orthogonality. 228 229 Level: advanced 230 231 Note: This is slower than KSP_GMRES_CGS_REFINE_NEVER because it requires an extra norm computation to 232 estimate the orthogonality but is more stable. 233 234 .seealso: KSPGMRESClassicalGramSchmidtOrthogonalization(), KSPGMRESSetOrthogonalization(), KSPGMRESGetOrthogonalization(), 235 KSPGMRESSetCGSRefinementType(), KSPGMRESGetCGSRefinementType(), KSP_GMRES_CGS_REFINE_NEVER, KSP_GMRES_CGS_REFINE_ALWAYS, 236 KSPGMRESModifiedGramSchmidtOrthogonalization() 237 M*/ 238 239 /*MC 240 KSP_GMRES_CGS_REFINE_NEVER - Do two steps of the classical (unmodified) Gram-Schmidt process. 241 242 Level: advanced 243 244 Note: This is roughly twice the cost of KSP_GMRES_CGS_REFINE_NEVER because it performs the process twice 245 but it saves the extra norm calculation needed by KSP_GMRES_CGS_REFINE_IFNEEDED. 246 247 You should only use this if you absolutely know that the iterative refinement is needed. 248 249 .seealso: KSPGMRESClassicalGramSchmidtOrthogonalization(), KSPGMRESSetOrthogonalization(), KSPGMRESGetOrthogonalization(), 250 KSPGMRESSetCGSRefinementType(), KSPGMRESGetCGSRefinementType(), KSP_GMRES_CGS_REFINE_IFNEEDED, KSP_GMRES_CGS_REFINE_ALWAYS, 251 KSPGMRESModifiedGramSchmidtOrthogonalization() 252 M*/ 253 254 extern PetscErrorCode KSPGMRESSetCGSRefinementType(KSP,KSPGMRESCGSRefinementType); 255 extern PetscErrorCode KSPGMRESGetCGSRefinementType(KSP,KSPGMRESCGSRefinementType*); 256 257 extern PetscErrorCode KSPFGMRESModifyPCNoChange(KSP,PetscInt,PetscInt,PetscReal,void*); 258 extern PetscErrorCode KSPFGMRESModifyPCKSP(KSP,PetscInt,PetscInt,PetscReal,void*); 259 extern PetscErrorCode KSPFGMRESSetModifyPC(KSP,PetscErrorCode (*)(KSP,PetscInt,PetscInt,PetscReal,void*),void*,PetscErrorCode(*)(void*)); 260 261 extern PetscErrorCode KSPQCGSetTrustRegionRadius(KSP,PetscReal); 262 extern PetscErrorCode KSPQCGGetQuadratic(KSP,PetscReal*); 263 extern PetscErrorCode KSPQCGGetTrialStepNorm(KSP,PetscReal*); 264 265 extern PetscErrorCode KSPBCGSLSetXRes(KSP,PetscReal); 266 extern PetscErrorCode KSPBCGSLSetPol(KSP,PetscBool ); 267 extern PetscErrorCode KSPBCGSLSetEll(KSP,PetscInt); 268 269 extern PetscErrorCode KSPSetFromOptions(KSP); 270 extern PetscErrorCode KSPAddOptionsChecker(PetscErrorCode (*)(KSP)); 271 272 extern PetscErrorCode KSPMonitorSingularValue(KSP,PetscInt,PetscReal,void *); 273 extern PetscErrorCode KSPMonitorDefault(KSP,PetscInt,PetscReal,void *); 274 extern PetscErrorCode KSPLSQRMonitorDefault(KSP,PetscInt,PetscReal,void *); 275 extern PetscErrorCode KSPMonitorRange(KSP,PetscInt,PetscReal,void *); 276 extern PetscErrorCode KSPMonitorTrueResidualNorm(KSP,PetscInt,PetscReal,void *); 277 extern PetscErrorCode KSPMonitorDefaultShort(KSP,PetscInt,PetscReal,void *); 278 extern PetscErrorCode KSPMonitorSolution(KSP,PetscInt,PetscReal,void *); 279 extern PetscErrorCode KSPMonitorAMS(KSP,PetscInt,PetscReal,void*); 280 extern PetscErrorCode KSPMonitorAMSCreate(KSP,const char*,void**); 281 extern PetscErrorCode KSPMonitorAMSDestroy(void**); 282 extern PetscErrorCode KSPGMRESMonitorKrylov(KSP,PetscInt,PetscReal,void *); 283 284 extern PetscErrorCode KSPUnwindPreconditioner(KSP,Vec,Vec); 285 extern PetscErrorCode KSPDefaultBuildSolution(KSP,Vec,Vec*); 286 extern PetscErrorCode KSPDefaultBuildResidual(KSP,Vec,Vec,Vec *); 287 extern PetscErrorCode KSPInitialResidual(KSP,Vec,Vec,Vec,Vec,Vec); 288 289 extern PetscErrorCode KSPSetOperators(KSP,Mat,Mat,MatStructure); 290 extern PetscErrorCode KSPGetOperators(KSP,Mat*,Mat*,MatStructure*); 291 extern PetscErrorCode KSPGetOperatorsSet(KSP,PetscBool *,PetscBool *); 292 extern PetscErrorCode KSPSetOptionsPrefix(KSP,const char[]); 293 extern PetscErrorCode KSPAppendOptionsPrefix(KSP,const char[]); 294 extern PetscErrorCode KSPGetOptionsPrefix(KSP,const char*[]); 295 296 extern PetscErrorCode KSPSetDiagonalScale(KSP,PetscBool ); 297 extern PetscErrorCode KSPGetDiagonalScale(KSP,PetscBool *); 298 extern PetscErrorCode KSPSetDiagonalScaleFix(KSP,PetscBool ); 299 extern PetscErrorCode KSPGetDiagonalScaleFix(KSP,PetscBool *); 300 301 extern PetscErrorCode KSPView(KSP,PetscViewer); 302 303 extern PetscErrorCode KSPLSQRSetStandardErrorVec(KSP,Vec); 304 extern PetscErrorCode KSPLSQRGetStandardErrorVec(KSP,Vec*); 305 306 extern PetscErrorCode PCRedundantGetKSP(PC,KSP*); 307 extern PetscErrorCode PCRedistributeGetKSP(PC,KSP*); 308 309 /*E 310 KSPNormType - Norm that is passed in the Krylov convergence 311 test routines. 312 313 Level: advanced 314 315 Each solver only supports a subset of these and some may support different ones 316 depending on left or right preconditioning, see KSPSetPCSide() 317 318 Notes: this must match finclude/petscksp.h 319 320 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPSetNormType(), 321 KSPSetConvergenceTest(), KSPSetPCSide() 322 E*/ 323 typedef enum {KSP_NORM_DEFAULT = -1,KSP_NORM_NONE = 0,KSP_NORM_PRECONDITIONED = 1,KSP_NORM_UNPRECONDITIONED = 2,KSP_NORM_NATURAL = 3} KSPNormType; 324 #define KSP_NORM_MAX (KSP_NORM_NATURAL + 1) 325 extern const char *const*const KSPNormTypes; 326 327 /*MC 328 KSP_NORM_NONE - Do not compute a norm during the Krylov process. This will 329 possibly save some computation but means the convergence test cannot 330 be based on a norm of a residual etc. 331 332 Level: advanced 333 334 Note: Some Krylov methods need to compute a residual norm and then this option is ignored 335 336 .seealso: KSPNormType, KSPSetNormType(), KSP_NORM_PRECONDITIONED, KSP_NORM_UNPRECONDITIONED, KSP_NORM_NATURAL 337 M*/ 338 339 /*MC 340 KSP_NORM_PRECONDITIONED - Compute the norm of the preconditioned residual and pass that to the 341 convergence test routine. 342 343 Level: advanced 344 345 .seealso: KSPNormType, KSPSetNormType(), KSP_NORM_NONE, KSP_NORM_UNPRECONDITIONED, KSP_NORM_NATURAL, KSPSetConvergenceTest() 346 M*/ 347 348 /*MC 349 KSP_NORM_UNPRECONDITIONED - Compute the norm of the true residual (b - A*x) and pass that to the 350 convergence test routine. 351 352 Level: advanced 353 354 .seealso: KSPNormType, KSPSetNormType(), KSP_NORM_NONE, KSP_NORM_PRECONDITIONED, KSP_NORM_NATURAL, KSPSetConvergenceTest() 355 M*/ 356 357 /*MC 358 KSP_NORM_NATURAL - Compute the 'natural norm' of residual sqrt((b - A*x)*B*(b - A*x)) and pass that to the 359 convergence test routine. This is only supported by KSPCG, KSPCR, KSPCGNE, KSPCGS 360 361 Level: advanced 362 363 .seealso: KSPNormType, KSPSetNormType(), KSP_NORM_NONE, KSP_NORM_PRECONDITIONED, KSP_NORM_UNPRECONDITIONED, KSPSetConvergenceTest() 364 M*/ 365 366 extern PetscErrorCode KSPSetNormType(KSP,KSPNormType); 367 extern PetscErrorCode KSPGetNormType(KSP,KSPNormType*); 368 extern PetscErrorCode KSPSetSupportedNorm(KSP ksp,KSPNormType,PCSide,PetscInt); 369 extern PetscErrorCode KSPSetCheckNormIteration(KSP,PetscInt); 370 extern PetscErrorCode KSPSetLagNorm(KSP,PetscBool ); 371 372 /*E 373 KSPConvergedReason - reason a Krylov method was said to 374 have converged or diverged 375 376 Level: beginner 377 378 Notes: See KSPGetConvergedReason() for explanation of each value 379 380 Developer notes: this must match finclude/petscksp.h 381 382 The string versions of these are KSPConvergedReasons; if you change 383 any of the values here also change them that array of names. 384 385 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPSetTolerances() 386 E*/ 387 typedef enum {/* converged */ 388 KSP_CONVERGED_RTOL_NORMAL = 1, 389 KSP_CONVERGED_ATOL_NORMAL = 9, 390 KSP_CONVERGED_RTOL = 2, 391 KSP_CONVERGED_ATOL = 3, 392 KSP_CONVERGED_ITS = 4, 393 KSP_CONVERGED_CG_NEG_CURVE = 5, 394 KSP_CONVERGED_CG_CONSTRAINED = 6, 395 KSP_CONVERGED_STEP_LENGTH = 7, 396 KSP_CONVERGED_HAPPY_BREAKDOWN = 8, 397 /* diverged */ 398 KSP_DIVERGED_NULL = -2, 399 KSP_DIVERGED_ITS = -3, 400 KSP_DIVERGED_DTOL = -4, 401 KSP_DIVERGED_BREAKDOWN = -5, 402 KSP_DIVERGED_BREAKDOWN_BICG = -6, 403 KSP_DIVERGED_NONSYMMETRIC = -7, 404 KSP_DIVERGED_INDEFINITE_PC = -8, 405 KSP_DIVERGED_NAN = -9, 406 KSP_DIVERGED_INDEFINITE_MAT = -10, 407 408 KSP_CONVERGED_ITERATING = 0} KSPConvergedReason; 409 extern const char *const*KSPConvergedReasons; 410 411 /*MC 412 KSP_CONVERGED_RTOL - norm(r) <= rtol*norm(b) 413 414 Level: beginner 415 416 See KSPNormType and KSPSetNormType() for possible norms that may be used. By default 417 for left preconditioning it is the 2-norm of the preconditioned residual, and the 418 2-norm of the residual for right preconditioning 419 420 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 421 422 M*/ 423 424 /*MC 425 KSP_CONVERGED_ATOL - norm(r) <= atol 426 427 Level: beginner 428 429 See KSPNormType and KSPSetNormType() for possible norms that may be used. By default 430 for left preconditioning it is the 2-norm of the preconditioned residual, and the 431 2-norm of the residual for right preconditioning 432 433 Level: beginner 434 435 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 436 437 M*/ 438 439 /*MC 440 KSP_DIVERGED_DTOL - norm(r) >= dtol*norm(b) 441 442 Level: beginner 443 444 See KSPNormType and KSPSetNormType() for possible norms that may be used. By default 445 for left preconditioning it is the 2-norm of the preconditioned residual, and the 446 2-norm of the residual for right preconditioning 447 448 Level: beginner 449 450 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 451 452 M*/ 453 454 /*MC 455 KSP_DIVERGED_ITS - Ran out of iterations before any convergence criteria was 456 reached 457 458 Level: beginner 459 460 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 461 462 M*/ 463 464 /*MC 465 KSP_CONVERGED_ITS - Used by the KSPPREONLY solver after the single iteration of 466 the preconditioner is applied. Also used when the KSPSkipConverged() convergence 467 test routine is set in KSP. 468 469 470 Level: beginner 471 472 473 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 474 475 M*/ 476 477 /*MC 478 KSP_DIVERGED_BREAKDOWN - A breakdown in the Krylov method was detected so the 479 method could not continue to enlarge the Krylov space. Could be due to a singlular matrix or 480 preconditioner. 481 482 Level: beginner 483 484 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 485 486 M*/ 487 488 /*MC 489 KSP_DIVERGED_BREAKDOWN_BICG - A breakdown in the KSPBICG method was detected so the 490 method could not continue to enlarge the Krylov space. 491 492 493 Level: beginner 494 495 496 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 497 498 M*/ 499 500 /*MC 501 KSP_DIVERGED_NONSYMMETRIC - It appears the operator or preconditioner is not 502 symmetric and this Krylov method (KSPCG, KSPMINRES, KSPCR) requires symmetry 503 504 Level: beginner 505 506 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 507 508 M*/ 509 510 /*MC 511 KSP_DIVERGED_INDEFINITE_PC - It appears the preconditioner is indefinite (has both 512 positive and negative eigenvalues) and this Krylov method (KSPCG) requires it to 513 be positive definite 514 515 Level: beginner 516 517 Notes: This can happen with the PCICC preconditioner, use -pc_factor_shift_positive_definite to force 518 the PCICC preconditioner to generate a positive definite preconditioner 519 520 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 521 522 M*/ 523 524 /*MC 525 KSP_CONVERGED_ITERATING - This flag is returned if you call KSPGetConvergedReason() 526 while the KSPSolve() is still running. 527 528 Level: beginner 529 530 .seealso: KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances() 531 532 M*/ 533 534 extern PetscErrorCode KSPSetConvergenceTest(KSP,PetscErrorCode (*)(KSP,PetscInt,PetscReal,KSPConvergedReason*,void*),void *,PetscErrorCode (*)(void*)); 535 extern PetscErrorCode KSPGetConvergenceContext(KSP,void **); 536 extern PetscErrorCode KSPDefaultConverged(KSP,PetscInt,PetscReal,KSPConvergedReason*,void *); 537 extern PetscErrorCode KSPConvergedLSQR(KSP,PetscInt,PetscReal,KSPConvergedReason*,void *); 538 extern PetscErrorCode KSPDefaultConvergedDestroy(void *); 539 extern PetscErrorCode KSPDefaultConvergedCreate(void **); 540 extern PetscErrorCode KSPDefaultConvergedSetUIRNorm(KSP); 541 extern PetscErrorCode KSPDefaultConvergedSetUMIRNorm(KSP); 542 extern PetscErrorCode KSPSkipConverged(KSP,PetscInt,PetscReal,KSPConvergedReason*,void *); 543 extern PetscErrorCode KSPGetConvergedReason(KSP,KSPConvergedReason *); 544 545 extern PetscErrorCode KSPComputeExplicitOperator(KSP,Mat *); 546 547 /*E 548 KSPCGType - Determines what type of CG to use 549 550 Level: beginner 551 552 .seealso: KSPCGSetType() 553 E*/ 554 typedef enum {KSP_CG_SYMMETRIC=0,KSP_CG_HERMITIAN=1} KSPCGType; 555 extern const char *KSPCGTypes[]; 556 557 extern PetscErrorCode KSPCGSetType(KSP,KSPCGType); 558 extern PetscErrorCode KSPCGUseSingleReduction(KSP,PetscBool ); 559 560 extern PetscErrorCode KSPNASHSetRadius(KSP,PetscReal); 561 extern PetscErrorCode KSPNASHGetNormD(KSP,PetscReal *); 562 extern PetscErrorCode KSPNASHGetObjFcn(KSP,PetscReal *); 563 564 extern PetscErrorCode KSPSTCGSetRadius(KSP,PetscReal); 565 extern PetscErrorCode KSPSTCGGetNormD(KSP,PetscReal *); 566 extern PetscErrorCode KSPSTCGGetObjFcn(KSP,PetscReal *); 567 568 extern PetscErrorCode KSPGLTRSetRadius(KSP,PetscReal); 569 extern PetscErrorCode KSPGLTRGetNormD(KSP,PetscReal *); 570 extern PetscErrorCode KSPGLTRGetObjFcn(KSP,PetscReal *); 571 extern PetscErrorCode KSPGLTRGetMinEig(KSP,PetscReal *); 572 extern PetscErrorCode KSPGLTRGetLambda(KSP,PetscReal *); 573 574 extern PetscErrorCode KSPPythonSetType(KSP,const char[]); 575 576 extern PetscErrorCode PCPreSolve(PC,KSP); 577 extern PetscErrorCode PCPostSolve(PC,KSP); 578 579 extern PetscErrorCode KSPMonitorLGCreate(const char[],const char[],int,int,int,int,PetscDrawLG*); 580 extern PetscErrorCode KSPMonitorLG(KSP,PetscInt,PetscReal,void*); 581 extern PetscErrorCode KSPMonitorLGDestroy(PetscDrawLG*); 582 extern PetscErrorCode KSPMonitorLGTrueResidualNormCreate(MPI_Comm,const char[],const char[],int,int,int,int,PetscDrawLG*); 583 extern PetscErrorCode KSPMonitorLGTrueResidualNorm(KSP,PetscInt,PetscReal,void*); 584 extern PetscErrorCode KSPMonitorLGTrueResidualNormDestroy(PetscDrawLG*); 585 extern PetscErrorCode KSPMonitorLGRangeCreate(const char[],const char[],int,int,int,int,PetscDrawLG*); 586 extern PetscErrorCode KSPMonitorLGRange(KSP,PetscInt,PetscReal,void*); 587 extern PetscErrorCode KSPMonitorLGRangeDestroy(PetscDrawLG*); 588 589 extern PetscErrorCode PCShellSetPreSolve(PC,PetscErrorCode (*)(PC,KSP,Vec,Vec)); 590 extern PetscErrorCode PCShellSetPostSolve(PC,PetscErrorCode (*)(PC,KSP,Vec,Vec)); 591 592 /* see src/ksp/ksp/interface/iguess.c */ 593 typedef struct _p_KSPFischerGuess {PetscInt method,curl,maxl,refcnt;PetscBool monitor;Mat mat; KSP ksp;}* KSPFischerGuess; 594 595 extern PetscErrorCode KSPFischerGuessCreate(KSP,PetscInt,PetscInt,KSPFischerGuess*); 596 extern PetscErrorCode KSPFischerGuessDestroy(KSPFischerGuess*); 597 extern PetscErrorCode KSPFischerGuessReset(KSPFischerGuess); 598 extern PetscErrorCode KSPFischerGuessUpdate(KSPFischerGuess,Vec); 599 extern PetscErrorCode KSPFischerGuessFormGuess(KSPFischerGuess,Vec,Vec); 600 extern PetscErrorCode KSPFischerGuessSetFromOptions(KSPFischerGuess); 601 602 extern PetscErrorCode KSPSetUseFischerGuess(KSP,PetscInt,PetscInt); 603 extern PetscErrorCode KSPSetFischerGuess(KSP,KSPFischerGuess); 604 extern PetscErrorCode KSPGetFischerGuess(KSP,KSPFischerGuess*); 605 606 extern PetscErrorCode MatCreateSchurComplement(Mat,Mat,Mat,Mat,Mat,Mat*); 607 extern PetscErrorCode MatSchurComplementGetKSP(Mat,KSP*); 608 extern PetscErrorCode MatSchurComplementUpdate(Mat,Mat,Mat,Mat,Mat,Mat,MatStructure); 609 extern PetscErrorCode MatSchurComplementGetSubmatrices(Mat,Mat*,Mat*,Mat*,Mat*,Mat*); 610 extern PetscErrorCode MatGetSchurComplement(Mat,IS,IS,IS,IS,MatReuse,Mat *,MatReuse,Mat *); 611 612 extern PetscErrorCode MatGetSchurComplement_Basic(Mat mat,IS isrow0,IS iscol0,IS isrow1,IS iscol1,MatReuse mreuse,Mat *newmat,MatReuse preuse,Mat *newpmat); 613 614 extern PetscErrorCode KSPSetDM(KSP,DM); 615 extern PetscErrorCode KSPSetDMActive(KSP,PetscBool ); 616 extern PetscErrorCode KSPGetDM(KSP,DM*); 617 extern PetscErrorCode KSPSetApplicationContext(KSP,void*); 618 extern PetscErrorCode KSPGetApplicationContext(KSP,void*); 619 extern PetscErrorCode KSPSetComputeOperators(KSP,PetscErrorCode(*)(KSP,Mat,Mat,MatStructure*,void*),void*); 620 extern PetscErrorCode KSPSetComputeRHS(KSP,PetscErrorCode(*)(KSP,Vec,void*),void*); 621 extern PetscErrorCode DMKSPSetComputeOperators(DM,PetscErrorCode(*)(KSP,Mat,Mat,MatStructure*,void*),void*); 622 extern PetscErrorCode DMKSPGetComputeOperators(DM,PetscErrorCode(**)(KSP,Mat,Mat,MatStructure*,void*),void*); 623 extern PetscErrorCode DMKSPSetComputeRHS(DM,PetscErrorCode(*)(KSP,Vec,void*),void*); 624 extern PetscErrorCode DMKSPGetComputeRHS(DM,PetscErrorCode(**)(KSP,Vec,void*),void*); 625 626 PETSC_EXTERN_CXX_END 627 #endif 628