Date: 2023-01-26T12:19:43+00:00

Actual source code: lmeopts.c
slepc-3.18.2 2023-01-26
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      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain

      6:    This file is part of SLEPc.
      7:    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
      8:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      9: */
     10: /*
     11:    LME routines related to options that can be set via the command-line
     12:    or procedurally
     13: */

     15: #include <slepc/private/lmeimpl.h>
     16: #include <petscdraw.h>

     18: /*@C
     19:    LMEMonitorSetFromOptions - Sets a monitor function and viewer appropriate for the type
     20:    indicated by the user.

     22:    Collective on lme

     24:    Input Parameters:
     25: +  lme      - the linear matrix equation context
     26: .  opt  - the command line option for this monitor
     27: .  name - the monitor type one is seeking
     28: -  ctx  - an optional user context for the monitor, or NULL

     30:    Level: developer

     32: .seealso: LMEMonitorSet()
     33: @*/
     34: PetscErrorCode LMEMonitorSetFromOptions(LME lme,const char opt[],const char name[],void *ctx)
     35: {
     36:   PetscErrorCode       (*mfunc)(LME,PetscInt,PetscReal,void*);
     37:   PetscErrorCode       (*cfunc)(PetscViewer,PetscViewerFormat,void*,PetscViewerAndFormat**);
     38:   PetscErrorCode       (*dfunc)(PetscViewerAndFormat**);
     39:   PetscViewerAndFormat *vf;
     40:   PetscViewer          viewer;
     41:   PetscViewerFormat    format;
     42:   PetscViewerType      vtype;
     43:   char                 key[PETSC_MAX_PATH_LEN];
     44:   PetscBool            flg;

     46:   PetscOptionsGetViewer(PetscObjectComm((PetscObject)lme),((PetscObject)lme)->options,((PetscObject)lme)->prefix,opt,&viewer,&format,&flg);
     47:   if (!flg) return 0;

     49:   PetscViewerGetType(viewer,&vtype);
     50:   SlepcMonitorMakeKey_Internal(name,vtype,format,key);
     51:   PetscFunctionListFind(LMEMonitorList,key,&mfunc);
     53:   PetscFunctionListFind(LMEMonitorCreateList,key,&cfunc);
     54:   PetscFunctionListFind(LMEMonitorDestroyList,key,&dfunc);
     55:   if (!cfunc) cfunc = PetscViewerAndFormatCreate_Internal;
     56:   if (!dfunc) dfunc = PetscViewerAndFormatDestroy;

     58:   (*cfunc)(viewer,format,ctx,&vf);
     59:   PetscObjectDereference((PetscObject)viewer);
     60:   LMEMonitorSet(lme,mfunc,vf,(PetscErrorCode(*)(void **))dfunc);
     61:   return 0;
     62: }

     64: /*@
     65:    LMESetFromOptions - Sets LME options from the options database.
     66:    This routine must be called before LMESetUp() if the user is to be
     67:    allowed to set the solver type.

     69:    Collective on lme

     71:    Input Parameters:
     72: .  lme - the linear matrix equation solver context

     74:    Notes:
     75:    To see all options, run your program with the -help option.

     77:    Level: beginner

     79: .seealso: LMESetOptionsPrefix()
     80: @*/
     81: PetscErrorCode LMESetFromOptions(LME lme)
     82: {
     83:   char           type[256];
     84:   PetscBool      set,flg,flg1,flg2;
     85:   PetscReal      r;
     86:   PetscInt       i;

     89:   LMERegisterAll();
     90:   PetscObjectOptionsBegin((PetscObject)lme);
     91:     PetscOptionsFList("-lme_type","Linear matrix equation","LMESetType",LMEList,(char*)(((PetscObject)lme)->type_name?((PetscObject)lme)->type_name:LMEKRYLOV),type,sizeof(type),&flg);
     92:     if (flg) LMESetType(lme,type);
     93:     else if (!((PetscObject)lme)->type_name) LMESetType(lme,LMEKRYLOV);

     95:     PetscOptionsBoolGroupBegin("-lme_lyapunov","Continuous-time Lyapunov equation","LMESetProblemType",&flg);
     96:     if (flg) LMESetProblemType(lme,LME_LYAPUNOV);
     97:     PetscOptionsBoolGroup("-lme_sylvester","Continuous-time Sylvester equation","LMESetProblemType",&flg);
     98:     if (flg) LMESetProblemType(lme,LME_SYLVESTER);
     99:     PetscOptionsBoolGroup("-lme_gen_lyapunov","Generalized Lyapunov equation","LMESetProblemType",&flg);
    100:     if (flg) LMESetProblemType(lme,LME_GEN_LYAPUNOV);
    101:     PetscOptionsBoolGroup("-lme_gen_sylvester","Generalized Sylvester equation","LMESetProblemType",&flg);
    102:     if (flg) LMESetProblemType(lme,LME_GEN_SYLVESTER);
    103:     PetscOptionsBoolGroup("-lme_dt_lyapunov","Discrete-time Lyapunov equation","LMESetProblemType",&flg);
    104:     if (flg) LMESetProblemType(lme,LME_DT_LYAPUNOV);
    105:     PetscOptionsBoolGroupEnd("-lme_stein","Stein equation","LMESetProblemType",&flg);
    106:     if (flg) LMESetProblemType(lme,LME_STEIN);

    108:     i = lme->max_it;
    109:     PetscOptionsInt("-lme_max_it","Maximum number of iterations","LMESetTolerances",lme->max_it,&i,&flg1);
    110:     if (!flg1) i = PETSC_DEFAULT;
    111:     r = lme->tol;
    112:     PetscOptionsReal("-lme_tol","Tolerance","LMESetTolerances",SlepcDefaultTol(lme->tol),&r,&flg2);
    113:     if (flg1 || flg2) LMESetTolerances(lme,r,i);

    115:     PetscOptionsInt("-lme_ncv","Number of basis vectors","LMESetDimensions",lme->ncv,&i,&flg);
    116:     if (flg) LMESetDimensions(lme,i);

    118:     PetscOptionsBool("-lme_error_if_not_converged","Generate error if solver does not converge","LMESetErrorIfNotConverged",lme->errorifnotconverged,&lme->errorifnotconverged,NULL);

    120:     /* -----------------------------------------------------------------------*/
    121:     /*
    122:       Cancels all monitors hardwired into code before call to LMESetFromOptions()
    123:     */
    124:     PetscOptionsBool("-lme_monitor_cancel","Remove any hardwired monitor routines","LMEMonitorCancel",PETSC_FALSE,&flg,&set);
    125:     if (set && flg) LMEMonitorCancel(lme);
    126:     LMEMonitorSetFromOptions(lme,"-lme_monitor","error_estimate",NULL);

    128:     /* -----------------------------------------------------------------------*/
    129:     PetscOptionsName("-lme_view","Print detailed information on solver used","LMEView",NULL);

    131:     PetscTryTypeMethod(lme,setfromoptions,PetscOptionsObject);
    132:     PetscObjectProcessOptionsHandlers((PetscObject)lme,PetscOptionsObject);
    133:   PetscOptionsEnd();

    135:   if (!lme->V) LMEGetBV(lme,&lme->V);
    136:   BVSetFromOptions(lme->V);
    137:   return 0;
    138: }

    140: /*@
    141:    LMESetProblemType - Specifies the type of matrix equation to be solved.

    143:    Logically Collective on lme

    145:    Input Parameters:
    146: +  lme  - the linear matrix equation solver context
    147: -  type - a known type of matrix equation

    149:    Options Database Keys:
    150: +  -lme_lyapunov - continuous-time Lyapunov equation A*X+X*A'=-C
    151: .  -lme_sylvester - continuous-time Sylvester equation A*X+X*B=C
    152: .  -lme_gen_lyapunov - generalized Lyapunov equation A*X*D'+D*X*A'=-C
    153: .  -lme_gen_sylvester - generalized Sylvester equation A*X*E+D*X*B=C
    154: .  -lme_dt_lyapunov - discrete-time Lyapunov equation A*X*A'-X=-C
    155: -  -lme_stein - Stein equation A*X*E+X=C

    157:    Notes:
    158:    The coefficient matrices A, B, D, E must be provided via LMESetCoefficients(),
    159:    but some of them are optional depending on the matrix equation.

    161: .vb
    162:                             equation              A    B    D    E
    163:                           -----------------      ---  ---  ---  ---
    164:        LME_LYAPUNOV        A*X+X*A'=-C           yes (A-t)  -    -
    165:        LME_SYLVESTER       A*X+X*B=C             yes  yes   -    -
    166:        LME_GEN_LYAPUNOV    A*X*D'+D*X*A'=-C      yes (A-t) yes (D-t)
    167:        LME_GEN_SYLVESTER   A*X*E+D*X*B=C         yes  yes  yes  yes
    168:        LME_DT_LYAPUNOV     A*X*A'-X=-C           yes   -    -  (A-t)
    169:        LME_STEIN           A*X*E+X=C             yes   -    -   yes
    170: .ve

    172:    In the above table, the notation (A-t) means that this matrix need
    173:    not be passed, but the user may choose to pass an explicit transpose
    174:    of matrix A (for improved efficiency).

    176:    Also note that some of the equation types impose restrictions on the
    177:    properties of the coefficient matrices and possibly on the right-hand
    178:    side C.

    180:    Level: beginner

    182: .seealso: LMESetCoefficients(), LMESetType(), LMEGetProblemType(), LMEProblemType
    183: @*/
    184: PetscErrorCode LMESetProblemType(LME lme,LMEProblemType type)
    185: {
    188:   if (type == lme->problem_type) return 0;
    189:   switch (type) {
    190:     case LME_LYAPUNOV:
    191:     case LME_SYLVESTER:
    192:     case LME_GEN_LYAPUNOV:
    193:     case LME_GEN_SYLVESTER:
    194:     case LME_DT_LYAPUNOV:
    195:     case LME_STEIN:
    196:       break;
    197:     default:
    198:       SETERRQ(PetscObjectComm((PetscObject)lme),PETSC_ERR_ARG_WRONG,"Unknown matrix equation type");
    199:   }
    200:   lme->problem_type = type;
    201:   lme->setupcalled  = PETSC_FALSE;
    202:   return 0;
    203: }

    205: /*@
    206:    LMEGetProblemType - Gets the matrix equation type from the LME object.

    208:    Not Collective

    210:    Input Parameter:
    211: .  lme - the linear matrix equation solver context

    213:    Output Parameter:
    214: .  type - name of LME problem type

    216:    Level: intermediate

    218: .seealso: LMESetProblemType(), LMEProblemType
    219: @*/
    220: PetscErrorCode LMEGetProblemType(LME lme,LMEProblemType *type)
    221: {
    224:   *type = lme->problem_type;
    225:   return 0;
    226: }

    228: /*@C
    229:    LMEGetTolerances - Gets the tolerance and maximum iteration count used
    230:    by the LME convergence tests.

    232:    Not Collective

    234:    Input Parameter:
    235: .  lme - the linear matrix equation solver context

    237:    Output Parameters:
    238: +  tol - the convergence tolerance
    239: -  maxits - maximum number of iterations

    241:    Notes:
    242:    The user can specify NULL for any parameter that is not needed.

    244:    Level: intermediate

    246: .seealso: LMESetTolerances()
    247: @*/
    248: PetscErrorCode LMEGetTolerances(LME lme,PetscReal *tol,PetscInt *maxits)
    249: {
    251:   if (tol)    *tol    = lme->tol;
    252:   if (maxits) *maxits = lme->max_it;
    253:   return 0;
    254: }

    256: /*@
    257:    LMESetTolerances - Sets the tolerance and maximum iteration count used
    258:    by the LME convergence tests.

    260:    Logically Collective on lme

    262:    Input Parameters:
    263: +  lme - the linear matrix equation solver context
    264: .  tol - the convergence tolerance
    265: -  maxits - maximum number of iterations to use

    267:    Options Database Keys:
    268: +  -lme_tol <tol> - Sets the convergence tolerance
    269: -  -lme_max_it <maxits> - Sets the maximum number of iterations allowed

    271:    Notes:
    272:    Use PETSC_DEFAULT for either argument to assign a reasonably good value.

    274:    Level: intermediate

    276: .seealso: LMEGetTolerances()
    277: @*/
    278: PetscErrorCode LMESetTolerances(LME lme,PetscReal tol,PetscInt maxits)
    279: {
    283:   if (tol == PETSC_DEFAULT) {
    284:     lme->tol = PETSC_DEFAULT;
    285:     lme->setupcalled = 0;
    286:   } else {
    288:     lme->tol = tol;
    289:   }
    290:   if (maxits == PETSC_DEFAULT || maxits == PETSC_DECIDE) {
    291:     lme->max_it = PETSC_DEFAULT;
    292:     lme->setupcalled = 0;
    293:   } else {
    295:     lme->max_it = maxits;
    296:   }
    297:   return 0;
    298: }

    300: /*@
    301:    LMEGetDimensions - Gets the dimension of the subspace used by the solver.

    303:    Not Collective

    305:    Input Parameter:
    306: .  lme - the linear matrix equation solver context

    308:    Output Parameter:
    309: .  ncv - the maximum dimension of the subspace to be used by the solver

    311:    Level: intermediate

    313: .seealso: LMESetDimensions()
    314: @*/
    315: PetscErrorCode LMEGetDimensions(LME lme,PetscInt *ncv)
    316: {
    319:   *ncv = lme->ncv;
    320:   return 0;
    321: }

    323: /*@
    324:    LMESetDimensions - Sets the dimension of the subspace to be used by the solver.

    326:    Logically Collective on lme

    328:    Input Parameters:
    329: +  lme - the linear matrix equation solver context
    330: -  ncv - the maximum dimension of the subspace to be used by the solver

    332:    Options Database Keys:
    333: .  -lme_ncv <ncv> - Sets the dimension of the subspace

    335:    Notes:
    336:    Use PETSC_DEFAULT for ncv to assign a reasonably good value, which is
    337:    dependent on the solution method.

    339:    Level: intermediate

    341: .seealso: LMEGetDimensions()
    342: @*/
    343: PetscErrorCode LMESetDimensions(LME lme,PetscInt ncv)
    344: {
    347:   if (ncv == PETSC_DECIDE || ncv == PETSC_DEFAULT) {
    348:     lme->ncv = PETSC_DEFAULT;
    349:   } else {
    351:     lme->ncv = ncv;
    352:   }
    353:   lme->setupcalled = 0;
    354:   return 0;
    355: }

    357: /*@
    358:    LMESetErrorIfNotConverged - Causes LMESolve() to generate an error if the
    359:    solver has not converged.

    361:    Logically Collective on lme

    363:    Input Parameters:
    364: +  lme - the linear matrix equation solver context
    365: -  flg - PETSC_TRUE indicates you want the error generated

    367:    Options Database Keys:
    368: .  -lme_error_if_not_converged - this takes an optional truth value (0/1/no/yes/true/false)

    370:    Level: intermediate

    372:    Note:
    373:    Normally SLEPc continues if the solver fails to converge, you can call
    374:    LMEGetConvergedReason() after a LMESolve() to determine if it has converged.

    376: .seealso: LMEGetErrorIfNotConverged()
    377: @*/
    378: PetscErrorCode LMESetErrorIfNotConverged(LME lme,PetscBool flg)
    379: {
    382:   lme->errorifnotconverged = flg;
    383:   return 0;
    384: }

    386: /*@
    387:    LMEGetErrorIfNotConverged - Return a flag indicating whether LMESolve() will
    388:    generate an error if the solver does not converge.

    390:    Not Collective

    392:    Input Parameter:
    393: .  lme - the linear matrix equation solver context

    395:    Output Parameter:
    396: .  flag - PETSC_TRUE if it will generate an error, else PETSC_FALSE

    398:    Level: intermediate

    400: .seealso: LMESetErrorIfNotConverged()
    401: @*/
    402: PetscErrorCode LMEGetErrorIfNotConverged(LME lme,PetscBool *flag)
    403: {
    406:   *flag = lme->errorifnotconverged;
    407:   return 0;
    408: }

    410: /*@C
    411:    LMESetOptionsPrefix - Sets the prefix used for searching for all
    412:    LME options in the database.

    414:    Logically Collective on lme

    416:    Input Parameters:
    417: +  lme - the linear matrix equation solver context
    418: -  prefix - the prefix string to prepend to all LME option requests

    420:    Notes:
    421:    A hyphen (-) must NOT be given at the beginning of the prefix name.
    422:    The first character of all runtime options is AUTOMATICALLY the
    423:    hyphen.

    425:    For example, to distinguish between the runtime options for two
    426:    different LME contexts, one could call
    427: .vb
    428:       LMESetOptionsPrefix(lme1,"fun1_")
    429:       LMESetOptionsPrefix(lme2,"fun2_")
    430: .ve

    432:    Level: advanced

    434: .seealso: LMEAppendOptionsPrefix(), LMEGetOptionsPrefix()
    435: @*/
    436: PetscErrorCode LMESetOptionsPrefix(LME lme,const char *prefix)
    437: {
    439:   if (!lme->V) LMEGetBV(lme,&lme->V);
    440:   BVSetOptionsPrefix(lme->V,prefix);
    441:   PetscObjectSetOptionsPrefix((PetscObject)lme,prefix);
    442:   return 0;
    443: }

    445: /*@C
    446:    LMEAppendOptionsPrefix - Appends to the prefix used for searching for all
    447:    LME options in the database.

    449:    Logically Collective on lme

    451:    Input Parameters:
    452: +  lme - the linear matrix equation solver context
    453: -  prefix - the prefix string to prepend to all LME option requests

    455:    Notes:
    456:    A hyphen (-) must NOT be given at the beginning of the prefix name.
    457:    The first character of all runtime options is AUTOMATICALLY the hyphen.

    459:    Level: advanced

    461: .seealso: LMESetOptionsPrefix(), LMEGetOptionsPrefix()
    462: @*/
    463: PetscErrorCode LMEAppendOptionsPrefix(LME lme,const char *prefix)
    464: {
    466:   if (!lme->V) LMEGetBV(lme,&lme->V);
    467:   BVAppendOptionsPrefix(lme->V,prefix);
    468:   PetscObjectAppendOptionsPrefix((PetscObject)lme,prefix);
    469:   return 0;
    470: }

    472: /*@C
    473:    LMEGetOptionsPrefix - Gets the prefix used for searching for all
    474:    LME options in the database.

    476:    Not Collective

    478:    Input Parameters:
    479: .  lme - the linear matrix equation solver context

    481:    Output Parameters:
    482: .  prefix - pointer to the prefix string used is returned

    484:    Note:
    485:    On the Fortran side, the user should pass in a string 'prefix' of
    486:    sufficient length to hold the prefix.

    488:    Level: advanced

    490: .seealso: LMESetOptionsPrefix(), LMEAppendOptionsPrefix()
    491: @*/
    492: PetscErrorCode LMEGetOptionsPrefix(LME lme,const char *prefix[])
    493: {
    496:   PetscObjectGetOptionsPrefix((PetscObject)lme,prefix);
    497:   return 0;
    498: }