Date: 2017-05-17T08:27:48+00:00

Actual source code: nepimpl.h
slepc-3.7.4 2017-05-17
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      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-2016, Universitat Politecnica de Valencia, Spain

      6:    This file is part of SLEPc.

      8:    SLEPc is free software: you can redistribute it and/or modify it under  the
      9:    terms of version 3 of the GNU Lesser General Public License as published by
     10:    the Free Software Foundation.

     12:    SLEPc  is  distributed in the hope that it will be useful, but WITHOUT  ANY
     13:    WARRANTY;  without even the implied warranty of MERCHANTABILITY or  FITNESS
     14:    FOR  A  PARTICULAR PURPOSE. See the GNU Lesser General Public  License  for
     15:    more details.

     17:    You  should have received a copy of the GNU Lesser General  Public  License
     18:    along with SLEPc. If not, see <http://www.gnu.org/licenses/>.
     19:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     20: */

     22: #if !defined(_NEPIMPL)
     23: #define _NEPIMPL

     25: #include <slepcnep.h>
     26: #include <slepc/private/slepcimpl.h>

     28: PETSC_EXTERN PetscBool NEPRegisterAllCalled;
     29: PETSC_EXTERN PetscErrorCode NEPRegisterAll(void);
     30: PETSC_EXTERN PetscLogEvent NEP_SetUp,NEP_Solve,NEP_Refine,NEP_FunctionEval,NEP_JacobianEval,NEP_DerivativesEval;

     32: typedef struct _NEPOps *NEPOps;

     34: struct _NEPOps {
     35:   PetscErrorCode (*solve)(NEP);
     36:   PetscErrorCode (*setup)(NEP);
     37:   PetscErrorCode (*setfromoptions)(PetscOptionItems*,NEP);
     38:   PetscErrorCode (*publishoptions)(NEP);
     39:   PetscErrorCode (*destroy)(NEP);
     40:   PetscErrorCode (*reset)(NEP);
     41:   PetscErrorCode (*view)(NEP,PetscViewer);
     42:   PetscErrorCode (*computevectors)(NEP);
     43: };

     45: /*
     46:      Maximum number of monitors you can run with a single NEP
     47: */
     48: #define MAXNEPMONITORS 5

     50: typedef enum { NEP_STATE_INITIAL,
     51:                NEP_STATE_SETUP,
     52:                NEP_STATE_SOLVED,
     53:                NEP_STATE_EIGENVECTORS } NEPStateType;

     55: /*
     56:      How the problem function T(lambda) has been defined by the user
     57:      - Callback: one callback to build the function matrix, another one for the Jacobian
     58:      - Split: in split form sum_j(A_j*f_j(lambda))
     59:      - Derivatives: a single callback for all the derivatives (including the 0th derivative)
     60: */
     61: typedef enum { NEP_USER_INTERFACE_CALLBACK=1,
     62:                NEP_USER_INTERFACE_SPLIT,
     63:                NEP_USER_INTERFACE_DERIVATIVES } NEPUserInterface;

     65: /*
     66:    Defines the NEP data structure.
     67: */
     68: struct _p_NEP {
     69:   PETSCHEADER(struct _NEPOps);
     70:   /*------------------------- User parameters ---------------------------*/
     71:   PetscInt       max_it;           /* maximum number of iterations */
     72:   PetscInt       nev;              /* number of eigenvalues to compute */
     73:   PetscInt       ncv;              /* number of basis vectors */
     74:   PetscInt       mpd;              /* maximum dimension of projected problem */
     75:   PetscInt       nini;             /* number of initial vectors (negative means not copied yet) */
     76:   PetscScalar    target;           /* target value */
     77:   PetscReal      tol;              /* tolerance */
     78:   NEPConv        conv;             /* convergence test */
     79:   NEPStop        stop;             /* stopping test */
     80:   NEPWhich       which;            /* which part of the spectrum to be sought */
     81:   NEPRefine      refine;           /* type of refinement to be applied after solve */
     82:   PetscInt       npart;            /* number of partitions of the communicator */
     83:   PetscReal      rtol;             /* tolerance for refinement */
     84:   PetscInt       rits;             /* number of iterations of the refinement method */
     85:   NEPRefineScheme scheme;          /* scheme for solving linear systems within refinement */
     86:   PetscBool      trackall;         /* whether all the residuals must be computed */

     88:   /*-------------- User-provided functions and contexts -----------------*/
     89:   PetscErrorCode (*computefunction)(NEP,PetscScalar,Mat,Mat,void*);
     90:   PetscErrorCode (*computejacobian)(NEP,PetscScalar,Mat,void*);
     91:   void           *functionctx;
     92:   void           *jacobianctx;
     93:   PetscErrorCode (*computederivatives)(NEP,PetscScalar,PetscInt,Mat,void*);
     94:   void           *derivativesctx;
     95:   PetscErrorCode (*converged)(NEP,PetscScalar,PetscScalar,PetscReal,PetscReal*,void*);
     96:   PetscErrorCode (*convergeddestroy)(void*);
     97:   PetscErrorCode (*stopping)(NEP,PetscInt,PetscInt,PetscInt,PetscInt,NEPConvergedReason*,void*);
     98:   PetscErrorCode (*stoppingdestroy)(void*);
     99:   void           *convergedctx;
    100:   void           *stoppingctx;
    101:   PetscErrorCode (*monitor[MAXNEPMONITORS])(NEP,PetscInt,PetscInt,PetscScalar*,PetscScalar*,PetscReal*,PetscInt,void*);
    102:   PetscErrorCode (*monitordestroy[MAXNEPMONITORS])(void**);
    103:   void           *monitorcontext[MAXNEPMONITORS];
    104:   PetscInt       numbermonitors;

    106:   /*----------------- Child objects and working data -------------------*/
    107:   DS             ds;               /* direct solver object */
    108:   BV             V;                /* set of basis vectors and computed eigenvectors */
    109:   RG             rg;               /* optional region for filtering */
    110:   SlepcSC        sc;               /* sorting criterion data */
    111:   Mat            function;         /* function matrix */
    112:   Mat            function_pre;     /* function matrix (preconditioner) */
    113:   Mat            jacobian;         /* Jacobian matrix */
    114:   Mat            derivatives;      /* derivatives matrix */
    115:   Mat            *A;               /* matrix coefficients of split form */
    116:   FN             *f;               /* matrix functions of split form */
    117:   PetscInt       nt;               /* number of terms in split form */
    118:   MatStructure   mstr;             /* pattern of split matrices */
    119:   Vec            *IS;              /* references to user-provided initial space */
    120:   PetscScalar    *eigr,*eigi;      /* real and imaginary parts of eigenvalues */
    121:   PetscReal      *errest;          /* error estimates */
    122:   PetscInt       *perm;            /* permutation for eigenvalue ordering */
    123:   PetscInt       nwork;            /* number of work vectors */
    124:   Vec            *work;            /* work vectors */
    125:   KSP            refineksp;        /* ksp used in refinement */
    126:   PetscSubcomm   refinesubc;       /* context for sub-communicators */
    127:   void           *data;            /* placeholder for solver-specific stuff */

    129:   /* ----------------------- Status variables --------------------------*/
    130:   NEPStateType   state;            /* initial -> setup -> solved -> eigenvectors */
    131:   PetscInt       nconv;            /* number of converged eigenvalues */
    132:   PetscInt       its;              /* number of iterations so far computed */
    133:   PetscInt       n,nloc;           /* problem dimensions (global, local) */
    134:   PetscReal      *nrma;            /* computed matrix norms */
    135:   NEPUserInterface fui;            /* how the user has defined the nonlinear operator */
    136:   NEPConvergedReason reason;
    137: };

    139: /*
    140:     Macros to test valid NEP arguments
    141: */
    142: #if !defined(PETSC_USE_DEBUG)

    144: #define NEPCheckProblem(h,arg) do {} while (0)
    145: #define NEPCheckCallback(h,arg) do {} while (0)
    146: #define NEPCheckSplit(h,arg) do {} while (0)
    147: #define NEPCheckDerivatives(h,arg) do {} while (0)
    148: #define NEPCheckSolved(h,arg) do {} while (0)

    150: #else

    152: #define NEPCheckProblem(h,arg) \
    153:   do { \
    154:     if (!(h->fui)) SETERRQ1(PetscObjectComm((PetscObject)h),PETSC_ERR_ARG_WRONGSTATE,"The nonlinear eigenproblem has not been specified yet. Parameter #%d",arg); \
    155:   } while (0)

    157: #define NEPCheckCallback(h,arg) \
    158:   do { \
    159:     if (h->fui!=NEP_USER_INTERFACE_CALLBACK) SETERRQ1(PetscObjectComm((PetscObject)h),PETSC_ERR_ARG_WRONGSTATE,"This operation requires the nonlinear eigenproblem specified with callbacks. Parameter #%d",arg); \
    160:   } while (0)

    162: #define NEPCheckSplit(h,arg) \
    163:   do { \
    164:     if (h->fui!=NEP_USER_INTERFACE_SPLIT) SETERRQ1(PetscObjectComm((PetscObject)h),PETSC_ERR_ARG_WRONGSTATE,"This operation requires the nonlinear eigenproblem in split form. Parameter #%d",arg); \
    165:   } while (0)

    167: #define NEPCheckDerivatives(h,arg) \
    168:   do { \
    169:     if (h->fui!=NEP_USER_INTERFACE_DERIVATIVES) SETERRQ1(PetscObjectComm((PetscObject)h),PETSC_ERR_ARG_WRONGSTATE,"This operation requires the nonlinear eigenproblem specified with derivatives callback. Parameter #%d",arg); \
    170:   } while (0)

    172: #define NEPCheckSolved(h,arg) \
    173:   do { \
    174:     if (h->state<NEP_STATE_SOLVED) SETERRQ1(PetscObjectComm((PetscObject)h),PETSC_ERR_ARG_WRONGSTATE,"Must call NEPSolve() first: Parameter #%d",arg); \
    175:   } while (0)

    177: #endif

    179: PETSC_INTERN PetscErrorCode NEPSetDimensions_Default(NEP,PetscInt,PetscInt*,PetscInt*);
    180: PETSC_INTERN PetscErrorCode NEPComputeVectors(NEP);
    181: PETSC_INTERN PetscErrorCode NEPReset_Problem(NEP);
    182: PETSC_INTERN PetscErrorCode NEPGetDefaultShift(NEP,PetscScalar*);
    183: PETSC_INTERN PetscErrorCode NEPComputeVectors_Schur(NEP);
    184: PETSC_INTERN PetscErrorCode NEPComputeResidualNorm_Private(NEP,PetscScalar,Vec,Vec*,PetscReal*);
    185: PETSC_INTERN PetscErrorCode NEPNewtonRefinementSimple(NEP,PetscInt*,PetscReal,PetscInt);

    187: #endif