Actual source code: mfnmon.c

slepc-3.7.3 2016-09-29
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  1: /*
  2:       MFN routines related to monitors.

  4:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  5:    SLEPc - Scalable Library for Eigenvalue Problem Computations
  6:    Copyright (c) 2002-2016, 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/mfnimpl.h>   /*I "slepcmfn.h" I*/
 25: #include <petscdraw.h>

 29: /*
 30:    Runs the user provided monitor routines, if any.
 31: */
 32: PetscErrorCode MFNMonitor(MFN mfn,PetscInt it,PetscReal errest)
 33: {
 35:   PetscInt       i,n = mfn->numbermonitors;

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

 46: /*@C
 47:    MFNMonitorSet - Sets an ADDITIONAL function to be called at every
 48:    iteration to monitor convergence.

 50:    Logically Collective on MFN

 52:    Input Parameters:
 53: +  mfn     - matrix function context obtained from MFNCreate()
 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 (may be NULL)

 59:    Calling Sequence of monitor:
 60: $   monitor(MFN mfn,int its,PetscReal errest,void *mctx)

 62: +  mfn    - matrix function context obtained from MFNCreate()
 63: .  its    - iteration number
 64: .  errest - error estimate
 65: -  mctx   - optional monitoring context, as set by MFNMonitorSet()

 67:    Options Database Keys:
 68: +    -mfn_monitor        - print the error estimate
 69: .    -mfn_monitor_lg     - sets line graph monitor for the error estimate
 70: -    -mfn_monitor_cancel - cancels all monitors that have been hardwired into
 71:       a code by calls to MFNMonitorSet(), but does not cancel those set via
 72:       the options database.

 74:    Notes:
 75:    Several different monitoring routines may be set by calling
 76:    MFNMonitorSet() multiple times; all will be called in the
 77:    order in which they were set.

 79:    Level: intermediate

 81: .seealso: MFNMonitorFirst(), MFNMonitorAll(), MFNMonitorCancel()
 82: @*/
 83: PetscErrorCode MFNMonitorSet(MFN mfn,PetscErrorCode (*monitor)(MFN,PetscInt,PetscReal,void*),void *mctx,PetscErrorCode (*monitordestroy)(void**))
 84: {
 87:   if (mfn->numbermonitors >= MAXMFNMONITORS) SETERRQ(PetscObjectComm((PetscObject)mfn),PETSC_ERR_ARG_OUTOFRANGE,"Too many MFN monitors set");
 88:   mfn->monitor[mfn->numbermonitors]           = monitor;
 89:   mfn->monitorcontext[mfn->numbermonitors]    = (void*)mctx;
 90:   mfn->monitordestroy[mfn->numbermonitors++]  = monitordestroy;
 91:   return(0);
 92: }

 96: /*@
 97:    MFNMonitorCancel - Clears all monitors for an MFN object.

 99:    Logically Collective on MFN

101:    Input Parameters:
102: .  mfn - matrix function context obtained from MFNCreate()

104:    Options Database Key:
105: .    -mfn_monitor_cancel - Cancels all monitors that have been hardwired
106:       into a code by calls to MFNMonitorSet(),
107:       but does not cancel those set via the options database.

109:    Level: intermediate

111: .seealso: MFNMonitorSet()
112: @*/
113: PetscErrorCode MFNMonitorCancel(MFN mfn)
114: {
116:   PetscInt       i;

120:   for (i=0; i<mfn->numbermonitors; i++) {
121:     if (mfn->monitordestroy[i]) {
122:       (*mfn->monitordestroy[i])(&mfn->monitorcontext[i]);
123:     }
124:   }
125:   mfn->numbermonitors = 0;
126:   return(0);
127: }

131: /*@C
132:    MFNGetMonitorContext - Gets the monitor context, as set by
133:    MFNMonitorSet() for the FIRST monitor only.

135:    Not Collective

137:    Input Parameter:
138: .  mfn - matrix function context obtained from MFNCreate()

140:    Output Parameter:
141: .  ctx - monitor context

143:    Level: intermediate

145: .seealso: MFNMonitorSet()
146: @*/
147: PetscErrorCode MFNGetMonitorContext(MFN mfn,void **ctx)
148: {
151:   *ctx = mfn->monitorcontext[0];
152:   return(0);
153: }

157: /*@C
158:    MFNMonitorDefault - Print the error estimate of the current approximation at each
159:    iteration of the matrix function solver.

161:    Collective on MFN

163:    Input Parameters:
164: +  mfn    - matrix function context
165: .  its    - iteration number
166: .  errest - error estimate
167: -  vf     - viewer and format for monitoring

169:    Level: intermediate

171: .seealso: MFNMonitorSet()
172: @*/
173: PetscErrorCode MFNMonitorDefault(MFN mfn,PetscInt its,PetscReal errest,PetscViewerAndFormat *vf)
174: {
176:   PetscViewer    viewer;

181:   viewer = vf->viewer;
183:   PetscViewerPushFormat(viewer,vf->format);
184:   PetscViewerASCIIAddTab(viewer,((PetscObject)mfn)->tablevel);
185:   if (its == 1 && ((PetscObject)mfn)->prefix) {
186:     PetscViewerASCIIPrintf(viewer,"  Error estimates for %s solve.\n",((PetscObject)mfn)->prefix);
187:   }
188:   PetscViewerASCIIPrintf(viewer,"%3D MFN Error estimate %14.12e\n",its,(double)errest);
189:   PetscViewerASCIISubtractTab(viewer,((PetscObject)mfn)->tablevel);
190:   PetscViewerPopFormat(viewer);
191:   return(0);
192: }

196: /*@C
197:    MFNMonitorLGCreate - Creates a line graph context for use with
198:    MFN to monitor convergence.

200:    Collective on MPI_Comm

202:    Input Parameters:
203: +  comm - communicator context
204: .  host - the X display to open, or null for the local machine
205: .  label - the title to put in the title bar
206: .  x, y - the screen coordinates of the upper left coordinate of
207:           the window
208: -  m, n - the screen width and height in pixels

210:    Output Parameter:
211: .  lgctx - the drawing context

213:    Options Database Keys:
214: .  -mfn_monitor_lg - Sets line graph monitor

216:    Notes:
217:    Use PetscDrawLGDestroy() to destroy this line graph.

219:    Level: intermediate

221: .seealso: MFNMonitorSet()
222: @*/
223: PetscErrorCode MFNMonitorLGCreate(MPI_Comm comm,const char host[],const char label[],int x,int y,int m,int n,PetscDrawLG *lgctx)
224: {
225:   PetscDraw      draw;
226:   PetscDrawLG    lg;

230:   PetscDrawCreate(comm,host,label,x,y,m,n,&draw);
231:   PetscDrawSetFromOptions(draw);
232:   PetscDrawLGCreate(draw,1,&lg);
233:   PetscDrawLGSetFromOptions(lg);
234:   PetscDrawDestroy(&draw);
235:   *lgctx = lg;
236:   return(0);
237: }

241: PetscErrorCode MFNMonitorLG(MFN mfn,PetscInt its,PetscReal errest,void *ctx)
242: {
243:   PetscDrawLG    lg = (PetscDrawLG)ctx;
244:   PetscReal      x,y;

249:   if (its==1) {
250:     PetscDrawLGReset(lg);
251:     PetscDrawLGSetDimension(lg,1);
252:     PetscDrawLGSetLimits(lg,1,1.0,PetscLog10Real(mfn->tol)-2,0.0);
253:   }
254:   x = (PetscReal)its;
255:   if (errest > 0.0) y = PetscLog10Real(errest);
256:   else y = 0.0;
257:   PetscDrawLGAddPoint(lg,&x,&y);
258:   if (its <= 20 || !(its % 5) || mfn->reason) {
259:     PetscDrawLGDraw(lg);
260:     PetscDrawLGSave(lg);
261:   }
262:   return(0);
263: }