Date: 2013-09-02T10:07:41+00:00

Actual source code: nepmon.c

      1: /*
      2:       NEP routines related to monitors.

      4:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      5:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      6:    Copyright (c) 2002-2013, Universitat Politecnica de Valencia, Spain

      8:    This file is part of SLEPc.

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

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

     19:    You  should have received a copy of the GNU Lesser General  Public  License
     20:    along with SLEPc. If not, see <http://www.gnu.org/licenses/>.
     21:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     22: */

     24: #include <slepc-private/nepimpl.h>      /*I "slepcnep.h" I*/
     25: #include <petscdraw.h>

     29: /*
     30:    Runs the user provided monitor routines, if any.
     31: */
     32: PetscErrorCode NEPMonitor(NEP nep,PetscInt it,PetscInt nconv,PetscScalar *eig,PetscReal *errest,PetscInt nest)
     33: {
     35:   PetscInt       i,n = nep->numbermonitors;

     38:   for (i=0;i<n;i++) {
     39:     (*nep->monitor[i])(nep,it,nconv,eig,errest,nest,nep->monitorcontext[i]);
     40:   }
     41:   return(0);
     42: }

     46: /*@C
     47:    NEPMonitorSet - Sets an ADDITIONAL function to be called at every
     48:    iteration to monitor the error estimates for each requested eigenpair.

     50:    Logically Collective on NEP

     52:    Input Parameters:
     53: +  nep     - eigensolver context obtained from NEPCreate()
     54: .  monitor - pointer to function (if this is NULL, it turns off monitoring)
     55: .  mctx    - [optional] context for private data for the
     56:              monitor routine (use NULL if no context is desired)
     57: -  monitordestroy - [optional] routine that frees monitor context
     58:              (may be NULL)

     60:    Calling Sequence of monitor:
     61: $     monitor (NEP nep, int its, int nconv, PetscScalar *eig, PetscReal* errest, int nest, void *mctx)

     63: +  nep    - nonlinear eigensolver context obtained from NEPCreate()
     64: .  its    - iteration number
     65: .  nconv  - number of converged eigenpairs
     66: .  eig    - eigenvalues
     67: .  errest - error estimates for each eigenpair
     68: .  nest   - number of error estimates
     69: -  mctx   - optional monitoring context, as set by NEPMonitorSet()

     71:    Options Database Keys:
     72: +    -nep_monitor        - print only the first error estimate
     73: .    -nep_monitor_all    - print error estimates at each iteration
     74: .    -nep_monitor_conv   - print the eigenvalue approximations only when
     75:       convergence has been reached
     76: .    -nep_monitor_lg     - sets line graph monitor for the first unconverged
     77:       approximate eigenvalue
     78: .    -nep_monitor_lg_all - sets line graph monitor for all unconverged
     79:       approximate eigenvalues
     80: -    -nep_monitor_cancel - cancels all monitors that have been hardwired into
     81:       a code by calls to NEPMonitorSet(), but does not cancel those set via
     82:       the options database.

     84:    Notes:
     85:    Several different monitoring routines may be set by calling
     86:    NEPMonitorSet() multiple times; all will be called in the
     87:    order in which they were set.

     89:    Level: intermediate

     91: .seealso: NEPMonitorFirst(), NEPMonitorAll(), NEPMonitorCancel()
     92: @*/
     93: PetscErrorCode NEPMonitorSet(NEP nep,PetscErrorCode (*monitor)(NEP,PetscInt,PetscInt,PetscScalar*,PetscReal*,PetscInt,void*),void *mctx,PetscErrorCode (*monitordestroy)(void**))
     94: {
     97:   if (nep->numbermonitors >= MAXNEPMONITORS) SETERRQ(PetscObjectComm((PetscObject)nep),PETSC_ERR_ARG_OUTOFRANGE,"Too many NEP monitors set");
     98:   nep->monitor[nep->numbermonitors]           = monitor;
     99:   nep->monitorcontext[nep->numbermonitors]    = (void*)mctx;
    100:   nep->monitordestroy[nep->numbermonitors++]  = monitordestroy;
    101:   return(0);
    102: }

    106: /*@
    107:    NEPMonitorCancel - Clears all monitors for a NEP object.

    109:    Logically Collective on NEP

    111:    Input Parameters:
    112: .  nep - eigensolver context obtained from NEPCreate()

    114:    Options Database Key:
    115: .    -nep_monitor_cancel - Cancels all monitors that have been hardwired
    116:       into a code by calls to NEPMonitorSet(),
    117:       but does not cancel those set via the options database.

    119:    Level: intermediate

    121: .seealso: NEPMonitorSet()
    122: @*/
    123: PetscErrorCode NEPMonitorCancel(NEP nep)
    124: {
    126:   PetscInt       i;

    130:   for (i=0; i<nep->numbermonitors; i++) {
    131:     if (nep->monitordestroy[i]) {
    132:       (*nep->monitordestroy[i])(&nep->monitorcontext[i]);
    133:     }
    134:   }
    135:   nep->numbermonitors = 0;
    136:   return(0);
    137: }

    141: /*@C
    142:    NEPGetMonitorContext - Gets the monitor context, as set by
    143:    NEPMonitorSet() for the FIRST monitor only.

    145:    Not Collective

    147:    Input Parameter:
    148: .  nep - eigensolver context obtained from NEPCreate()

    150:    Output Parameter:
    151: .  ctx - monitor context

    153:    Level: intermediate

    155: .seealso: NEPMonitorSet(), NEPDefaultMonitor()
    156: @*/
    157: PetscErrorCode NEPGetMonitorContext(NEP nep,void **ctx)
    158: {
    161:   *ctx = nep->monitorcontext[0];
    162:   return(0);
    163: }

    167: /*@C
    168:    NEPMonitorAll - Print the current approximate values and
    169:    error estimates at each iteration of the nonlinear eigensolver.

    171:    Collective on NEP

    173:    Input Parameters:
    174: +  nep    - nonlinear eigensolver context
    175: .  its    - iteration number
    176: .  nconv  - number of converged eigenpairs so far
    177: .  eig    - eigenvalues
    178: .  errest - error estimates
    179: .  nest   - number of error estimates to display
    180: -  monctx - monitor context (contains viewer, can be NULL)

    182:    Level: intermediate

    184: .seealso: NEPMonitorSet(), NEPMonitorFirst(), NEPMonitorConverged()
    185: @*/
    186: PetscErrorCode NEPMonitorAll(NEP nep,PetscInt its,PetscInt nconv,PetscScalar *eig,PetscReal *errest,PetscInt nest,void *monctx)
    187: {
    189:   PetscInt       i;
    190:   PetscViewer    viewer = monctx? (PetscViewer)monctx: PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)nep));

    193:   if (its) {
    194:     PetscViewerASCIIAddTab(viewer,((PetscObject)nep)->tablevel);
    195:     PetscViewerASCIIPrintf(viewer,"%3D NEP nconv=%D Values (Errors)",its,nconv);
    196:     for (i=0;i<nest;i++) {
    197: #if defined(PETSC_USE_COMPLEX)
    198:       PetscViewerASCIIPrintf(viewer," %G%+Gi",PetscRealPart(eig[i]),PetscImaginaryPart(eig[i]));
    199: #else
    200:       PetscViewerASCIIPrintf(viewer," %G",eig[i]);
    201: #endif
    202:       PetscViewerASCIIPrintf(viewer," (%10.8e)",(double)errest[i]);
    203:     }
    204:     PetscViewerASCIIPrintf(viewer,"\n");
    205:     PetscViewerASCIISubtractTab(viewer,((PetscObject)nep)->tablevel);
    206:   }
    207:   return(0);
    208: }

    212: /*@C
    213:    NEPMonitorFirst - Print the first unconverged approximate value and
    214:    error estimate at each iteration of the nonlinear eigensolver.

    216:    Collective on NEP

    218:    Input Parameters:
    219: +  nep    - nonlinear eigensolver context
    220: .  its    - iteration number
    221: .  nconv  - number of converged eigenpairs so far
    222: .  eig    - eigenvalues
    223: .  errest - error estimates
    224: .  nest   - number of error estimates to display
    225: -  monctx - monitor context (contains viewer, can be NULL)

    227:    Level: intermediate

    229: .seealso: NEPMonitorSet(), NEPMonitorAll(), NEPMonitorConverged()
    230: @*/
    231: PetscErrorCode NEPMonitorFirst(NEP nep,PetscInt its,PetscInt nconv,PetscScalar *eig,PetscReal *errest,PetscInt nest,void *monctx)
    232: {
    234:   PetscViewer    viewer = monctx? (PetscViewer)monctx: PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)nep));

    237:   if (its && nconv<nest) {
    238:     PetscViewerASCIIAddTab(viewer,((PetscObject)nep)->tablevel);
    239:     PetscViewerASCIIPrintf(viewer,"%3D NEP nconv=%D first unconverged value (error)",its,nconv);
    240: #if defined(PETSC_USE_COMPLEX)
    241:     PetscViewerASCIIPrintf(viewer," %G%+Gi",PetscRealPart(eig[nconv]),PetscImaginaryPart(eig[nconv]));
    242: #else
    243:     PetscViewerASCIIPrintf(viewer," %G",eig[nconv]);
    244: #endif
    245:     PetscViewerASCIIPrintf(viewer," (%10.8e)\n",(double)errest[nconv]);
    246:     PetscViewerASCIISubtractTab(viewer,((PetscObject)nep)->tablevel);
    247:   }
    248:   return(0);
    249: }

    253: /*@C
    254:    NEPMonitorConverged - Print the approximate values and
    255:    error estimates as they converge.

    257:    Collective on NEP

    259:    Input Parameters:
    260: +  nep    - nonlinear eigensolver context
    261: .  its    - iteration number
    262: .  nconv  - number of converged eigenpairs so far
    263: .  eig    - eigenvalues
    264: .  errest - error estimates
    265: .  nest   - number of error estimates to display
    266: -  monctx - monitor context

    268:    Level: intermediate

    270:    Note:
    271:    The monitor context must contain a struct with a PetscViewer and a
    272:    PetscInt. In Fortran, pass a PETSC_NULL_OBJECT.

    274: .seealso: NEPMonitorSet(), NEPMonitorFirst(), NEPMonitorAll()
    275: @*/
    276: PetscErrorCode NEPMonitorConverged(NEP nep,PetscInt its,PetscInt nconv,PetscScalar *eig,PetscReal *errest,PetscInt nest,void *monctx)
    277: {
    278:   PetscErrorCode   ierr;
    279:   PetscInt         i;
    280:   PetscViewer      viewer;
    281:   SlepcConvMonitor ctx = (SlepcConvMonitor)monctx;

    284:   if (!monctx) SETERRQ(PetscObjectComm((PetscObject)nep),PETSC_ERR_ARG_WRONG,"Must provide a context for NEPMonitorConverged");
    285:   if (!its) {
    286:     ctx->oldnconv = 0;
    287:   } else {
    288:     viewer = ctx->viewer? ctx->viewer: PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)nep));
    289:     for (i=ctx->oldnconv;i<nconv;i++) {
    290:       PetscViewerASCIIAddTab(viewer,((PetscObject)nep)->tablevel);
    291:       PetscViewerASCIIPrintf(viewer,"%3D NEP converged value (error) #%D",its,i);
    292: #if defined(PETSC_USE_COMPLEX)
    293:       PetscViewerASCIIPrintf(viewer," %G%+Gi",PetscRealPart(eig[i]),PetscImaginaryPart(eig[i]));
    294: #else
    295:       PetscViewerASCIIPrintf(viewer," %G",eig[i]);
    296: #endif
    297:       PetscViewerASCIIPrintf(viewer," (%10.8e)\n",(double)errest[i]);
    298:       PetscViewerASCIISubtractTab(viewer,((PetscObject)nep)->tablevel);
    299:     }
    300:     ctx->oldnconv = nconv;
    301:   }
    302:   return(0);
    303: }

    307: PetscErrorCode NEPMonitorLG(NEP nep,PetscInt its,PetscInt nconv,PetscScalar *eig,PetscReal *errest,PetscInt nest,void *monctx)
    308: {
    309:   PetscViewer    viewer = (PetscViewer)monctx;
    310:   PetscDraw      draw;
    311:   PetscDrawLG    lg;
    313:   PetscReal      x,y;

    316:   if (!viewer) viewer = PETSC_VIEWER_DRAW_(PetscObjectComm((PetscObject)nep));
    317:   PetscViewerDrawGetDraw(viewer,0,&draw);
    318:   PetscViewerDrawGetDrawLG(viewer,0,&lg);
    319:   if (!its) {
    320:     PetscDrawSetTitle(draw,"Error estimates");
    321:     PetscDrawSetDoubleBuffer(draw);
    322:     PetscDrawLGSetDimension(lg,1);
    323:     PetscDrawLGReset(lg);
    324:     PetscDrawLGSetLimits(lg,0,1.0,log10(nep->rtol)-2,0.0);
    325:   }

    327:   x = (PetscReal)its;
    328:   if (errest[nconv] > 0.0) y = log10(errest[nconv]); else y = 0.0;
    329:   PetscDrawLGAddPoint(lg,&x,&y);

    331:   PetscDrawLGDraw(lg);
    332:   return(0);
    333: }

    337: PetscErrorCode NEPMonitorLGAll(NEP nep,PetscInt its,PetscInt nconv,PetscScalar *eig,PetscReal *errest,PetscInt nest,void *monctx)
    338: {
    339:   PetscViewer    viewer = (PetscViewer)monctx;
    340:   PetscDraw      draw;
    341:   PetscDrawLG    lg;
    343:   PetscReal      *x,*y;
    344:   PetscInt       i,n = PetscMin(nep->nev,255);

    347:   if (!viewer) viewer = PETSC_VIEWER_DRAW_(PetscObjectComm((PetscObject)nep));
    348:   PetscViewerDrawGetDraw(viewer,0,&draw);
    349:   PetscViewerDrawGetDrawLG(viewer,0,&lg);
    350:   if (!its) {
    351:     PetscDrawSetTitle(draw,"Error estimates");
    352:     PetscDrawSetDoubleBuffer(draw);
    353:     PetscDrawLGSetDimension(lg,n);
    354:     PetscDrawLGReset(lg);
    355:     PetscDrawLGSetLimits(lg,0,1.0,log10(nep->rtol)-2,0.0);
    356:   }

    358:   PetscMalloc(sizeof(PetscReal)*n,&x);
    359:   PetscMalloc(sizeof(PetscReal)*n,&y);
    360:   for (i=0;i<n;i++) {
    361:     x[i] = (PetscReal)its;
    362:     if (i < nest && errest[i] > 0.0) y[i] = log10(errest[i]);
    363:     else y[i] = 0.0;
    364:   }
    365:   PetscDrawLGAddPoint(lg,x,y);

    367:   PetscDrawLGDraw(lg);
    368:   PetscFree(x);
    369:   PetscFree(y);
    370:   return(0);
    371: }