Date: 2017-05-17T08:25:13+00:00

Actual source code: bvfunc.c
slepc-3.7.4 2017-05-17
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      1: /*
      2:    BV (basis vectors) interface routines, callable by users.

      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/bvimpl.h>            /*I "slepcbv.h" I*/

     26: PetscClassId     BV_CLASSID = 0;
     27: PetscLogEvent    BV_Create = 0,BV_Copy = 0,BV_Mult = 0,BV_MultVec = 0,BV_MultInPlace = 0,BV_Dot = 0,BV_DotVec = 0,BV_Orthogonalize = 0,BV_OrthogonalizeVec = 0,BV_Scale = 0,BV_Norm = 0,BV_NormVec = 0,BV_SetRandom = 0,BV_MatMult = 0,BV_MatMultVec = 0,BV_MatProject = 0;
     28: static PetscBool BVPackageInitialized = PETSC_FALSE;

     30: const char *BVOrthogTypes[] = {"CGS","MGS","BVOrthogType","BV_ORTHOG_",0};
     31: const char *BVOrthogRefineTypes[] = {"IFNEEDED","NEVER","ALWAYS","BVOrthogRefineType","BV_ORTHOG_REFINE_",0};
     32: const char *BVOrthogBlockTypes[] = {"GS","CHOL","BVOrthogBlockType","BV_ORTHOG_BLOCK_",0};
     33: const char *BVMatMultTypes[] = {"VECS","MAT","MAT_SAVE","BVMatMultType","BV_MATMULT_",0};

     37: /*@C
     38:    BVFinalizePackage - This function destroys everything in the Slepc interface
     39:    to the BV package. It is called from SlepcFinalize().

     41:    Level: developer

     43: .seealso: SlepcFinalize()
     44: @*/
     45: PetscErrorCode BVFinalizePackage(void)
     46: {

     50:   PetscFunctionListDestroy(&BVList);
     51:   BVPackageInitialized = PETSC_FALSE;
     52:   BVRegisterAllCalled  = PETSC_FALSE;
     53:   return(0);
     54: }

     58: /*@C
     59:    BVInitializePackage - This function initializes everything in the BV package.
     60:    It is called from PetscDLLibraryRegister() when using dynamic libraries, and
     61:    on the first call to BVCreate() when using static libraries.

     63:    Level: developer

     65: .seealso: SlepcInitialize()
     66: @*/
     67: PetscErrorCode BVInitializePackage(void)
     68: {
     69:   char           logList[256];
     70:   char           *className;
     71:   PetscBool      opt;

     75:   if (BVPackageInitialized) return(0);
     76:   BVPackageInitialized = PETSC_TRUE;
     77:   /* Register Classes */
     78:   PetscClassIdRegister("Basis Vectors",&BV_CLASSID);
     79:   /* Register Constructors */
     80:   BVRegisterAll();
     81:   /* Register Events */
     82:   PetscLogEventRegister("BVCreate",BV_CLASSID,&BV_Create);
     83:   PetscLogEventRegister("BVCopy",BV_CLASSID,&BV_Copy);
     84:   PetscLogEventRegister("BVMult",BV_CLASSID,&BV_Mult);
     85:   PetscLogEventRegister("BVMultVec",BV_CLASSID,&BV_MultVec);
     86:   PetscLogEventRegister("BVMultInPlace",BV_CLASSID,&BV_MultInPlace);
     87:   PetscLogEventRegister("BVDot",BV_CLASSID,&BV_Dot);
     88:   PetscLogEventRegister("BVDotVec",BV_CLASSID,&BV_DotVec);
     89:   PetscLogEventRegister("BVOrthogonalize",BV_CLASSID,&BV_Orthogonalize);
     90:   PetscLogEventRegister("BVOrthogonalizeV",BV_CLASSID,&BV_OrthogonalizeVec);
     91:   PetscLogEventRegister("BVScale",BV_CLASSID,&BV_Scale);
     92:   PetscLogEventRegister("BVNorm",BV_CLASSID,&BV_Norm);
     93:   PetscLogEventRegister("BVNormVec",BV_CLASSID,&BV_NormVec);
     94:   PetscLogEventRegister("BVSetRandom",BV_CLASSID,&BV_SetRandom);
     95:   PetscLogEventRegister("BVMatMult",BV_CLASSID,&BV_MatMult);
     96:   PetscLogEventRegister("BVMatMultVec",BV_CLASSID,&BV_MatMultVec);
     97:   PetscLogEventRegister("BVMatProject",BV_CLASSID,&BV_MatProject);
     98:   /* Process info exclusions */
     99:   PetscOptionsGetString(NULL,NULL,"-info_exclude",logList,256,&opt);
    100:   if (opt) {
    101:     PetscStrstr(logList,"bv",&className);
    102:     if (className) {
    103:       PetscInfoDeactivateClass(BV_CLASSID);
    104:     }
    105:   }
    106:   /* Process summary exclusions */
    107:   PetscOptionsGetString(NULL,NULL,"-log_exclude",logList,256,&opt);
    108:   if (opt) {
    109:     PetscStrstr(logList,"bv",&className);
    110:     if (className) {
    111:       PetscLogEventDeactivateClass(BV_CLASSID);
    112:     }
    113:   }
    114:   PetscRegisterFinalize(BVFinalizePackage);
    115:   return(0);
    116: }

    120: /*@
    121:    BVDestroy - Destroys BV context that was created with BVCreate().

    123:    Collective on BV

    125:    Input Parameter:
    126: .  bv - the basis vectors context

    128:    Level: beginner

    130: .seealso: BVCreate()
    131: @*/
    132: PetscErrorCode BVDestroy(BV *bv)
    133: {

    137:   if (!*bv) return(0);
    139:   if (--((PetscObject)(*bv))->refct > 0) { *bv = 0; return(0); }
    140:   if ((*bv)->ops->destroy) { (*(*bv)->ops->destroy)(*bv); }
    141:   VecDestroy(&(*bv)->t);
    142:   MatDestroy(&(*bv)->matrix);
    143:   VecDestroy(&(*bv)->Bx);
    144:   BVDestroy(&(*bv)->cached);
    145:   PetscFree((*bv)->work);
    146:   PetscFree2((*bv)->h,(*bv)->c);
    147:   PetscFree((*bv)->omega);
    148:   MatDestroy(&(*bv)->B);
    149:   MatDestroy(&(*bv)->C);
    150:   PetscRandomDestroy(&(*bv)->rand);
    151:   PetscHeaderDestroy(bv);
    152:   return(0);
    153: }

    157: /*@
    158:    BVCreate - Creates a basis vectors context.

    160:    Collective on MPI_Comm

    162:    Input Parameter:
    163: .  comm - MPI communicator

    165:    Output Parameter:
    166: .  bv - location to put the basis vectors context

    168:    Level: beginner

    170: .seealso: BVSetUp(), BVDestroy(), BV
    171: @*/
    172: PetscErrorCode BVCreate(MPI_Comm comm,BV *newbv)
    173: {
    175:   BV             bv;

    179:   *newbv = 0;
    180:   BVInitializePackage();
    181:   SlepcHeaderCreate(bv,BV_CLASSID,"BV","Basis Vectors","BV",comm,BVDestroy,BVView);

    183:   bv->t            = NULL;
    184:   bv->n            = -1;
    185:   bv->N            = -1;
    186:   bv->m            = 0;
    187:   bv->l            = 0;
    188:   bv->k            = 0;
    189:   bv->nc           = 0;
    190:   bv->orthog_type  = BV_ORTHOG_CGS;
    191:   bv->orthog_ref   = BV_ORTHOG_REFINE_IFNEEDED;
    192:   bv->orthog_eta   = 0.7071;
    193:   bv->orthog_block = BV_ORTHOG_BLOCK_GS;
    194:   bv->matrix       = NULL;
    195:   bv->indef        = PETSC_FALSE;
    196:   bv->vmm          = BV_MATMULT_MAT;

    198:   bv->Bx           = NULL;
    199:   bv->xid          = 0;
    200:   bv->xstate       = 0;
    201:   bv->cv[0]        = NULL;
    202:   bv->cv[1]        = NULL;
    203:   bv->ci[0]        = -1;
    204:   bv->ci[1]        = -1;
    205:   bv->st[0]        = -1;
    206:   bv->st[1]        = -1;
    207:   bv->id[0]        = 0;
    208:   bv->id[1]        = 0;
    209:   bv->h            = NULL;
    210:   bv->c            = NULL;
    211:   bv->omega        = NULL;
    212:   bv->B            = NULL;
    213:   bv->C            = NULL;
    214:   bv->Aid          = 0;
    215:   bv->defersfo     = PETSC_FALSE;
    216:   bv->cached       = NULL;
    217:   bv->bvstate      = 0;
    218:   bv->rand         = NULL;
    219:   bv->rrandom      = PETSC_FALSE;
    220:   bv->work         = NULL;
    221:   bv->lwork        = 0;
    222:   bv->data         = NULL;

    224:   *newbv = bv;
    225:   return(0);
    226: }

    230: /*@
    231:    BVInsertVec - Insert a vector into the specified column.

    233:    Collective on BV

    235:    Input Parameters:
    236: +  V - basis vectors
    237: .  j - the column of V to be overwritten
    238: -  w - the vector to be copied

    240:    Level: intermediate

    242: .seealso: BVInsertVecs()
    243: @*/
    244: PetscErrorCode BVInsertVec(BV V,PetscInt j,Vec w)
    245: {
    247:   PetscInt       n,N;
    248:   Vec            v;

    255:   BVCheckSizes(V,1);

    258:   VecGetSize(w,&N);
    259:   VecGetLocalSize(w,&n);
    260:   if (N!=V->N || n!=V->n) SETERRQ4(PetscObjectComm((PetscObject)V),PETSC_ERR_ARG_INCOMP,"Vec sizes (global %D, local %D) do not match BV sizes (global %D, local %D)",N,n,V->N,V->n);
    261:   if (j<-V->nc || j>=V->m) SETERRQ3(PetscObjectComm((PetscObject)V),PETSC_ERR_ARG_OUTOFRANGE,"Argument j has wrong value %D, should be between %D and %D",j,-V->nc,V->m-1);

    263:   BVGetColumn(V,j,&v);
    264:   VecCopy(w,v);
    265:   BVRestoreColumn(V,j,&v);
    266:   PetscObjectStateIncrease((PetscObject)V);
    267:   return(0);
    268: }

    272: /*@
    273:    BVInsertVecs - Insert a set of vectors into the specified columns.

    275:    Collective on BV

    277:    Input Parameters:
    278: +  V - basis vectors
    279: .  s - first column of V to be overwritten
    280: .  W - set of vectors to be copied
    281: -  orth - flag indicating if the vectors must be orthogonalized

    283:    Input/Output Parameter:
    284: .  m - number of input vectors, on output the number of linearly independent
    285:        vectors

    287:    Notes:
    288:    Copies the contents of vectors W to V(:,s:s+n). If the orthogonalization
    289:    flag is set, then the vectors are copied one by one and then orthogonalized
    290:    against the previous ones. If any of them is linearly dependent then it
    291:    is discarded and the value of m is decreased.

    293:    Level: intermediate

    295: .seealso: BVInsertVec(), BVOrthogonalizeColumn()
    296: @*/
    297: PetscErrorCode BVInsertVecs(BV V,PetscInt s,PetscInt *m,Vec *W,PetscBool orth)
    298: {
    300:   PetscInt       n,N,i,ndep;
    301:   PetscBool      lindep;
    302:   PetscReal      norm;
    303:   Vec            v;

    310:   if (!*m) return(0);
    311:   if (*m<0) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Number of vectors (given %D) cannot be negative",*m);
    316:   BVCheckSizes(V,1);

    319:   VecGetSize(*W,&N);
    320:   VecGetLocalSize(*W,&n);
    321:   if (N!=V->N || n!=V->n) SETERRQ4(PetscObjectComm((PetscObject)V),PETSC_ERR_ARG_INCOMP,"Vec sizes (global %D, local %D) do not match BV sizes (global %D, local %D)",N,n,V->N,V->n);
    322:   if (s<0 || s>=V->m) SETERRQ2(PetscObjectComm((PetscObject)V),PETSC_ERR_ARG_OUTOFRANGE,"Argument s has wrong value %D, should be between 0 and %D",s,V->m-1);
    323:   if (s+(*m)>V->m) SETERRQ1(PetscObjectComm((PetscObject)V),PETSC_ERR_ARG_OUTOFRANGE,"Too many vectors provided, there is only room for %D",V->m);

    325:   ndep = 0;
    326:   for (i=0;i<*m;i++) {
    327:     BVGetColumn(V,s+i-ndep,&v);
    328:     VecCopy(W[i],v);
    329:     BVRestoreColumn(V,s+i-ndep,&v);
    330:     if (orth) {
    331:       BVOrthogonalizeColumn(V,s+i-ndep,NULL,&norm,&lindep);
    332:       if (norm==0.0 || lindep) {
    333:         PetscInfo1(V,"Removing linearly dependent vector %D\n",i);
    334:         ndep++;
    335:       } else {
    336:         BVScaleColumn(V,s+i-ndep,1.0/norm);
    337:       }
    338:     }
    339:   }
    340:   *m -= ndep;
    341:   PetscObjectStateIncrease((PetscObject)V);
    342:   return(0);
    343: }

    347: /*@
    348:    BVInsertConstraints - Insert a set of vectors as constraints.

    350:    Collective on BV

    352:    Input Parameters:
    353: +  V - basis vectors
    354: -  C - set of vectors to be inserted as constraints

    356:    Input/Output Parameter:
    357: .  nc - number of input vectors, on output the number of linearly independent
    358:        vectors

    360:    Notes:
    361:    The constraints are relevant only during orthogonalization. Constraint
    362:    vectors span a subspace that is deflated in every orthogonalization
    363:    operation, so they are intended for removing those directions from the
    364:    orthogonal basis computed in regular BV columns.

    366:    Constraints are not stored in regular BV colums, but in a special part of
    367:    the storage. They can be accessed with negative indices in BVGetColumn().

    369:    This operation is DESTRUCTIVE, meaning that all data contained in the
    370:    columns of V is lost. This is typically invoked just after creating the BV.
    371:    Once a set of constraints has been set, it is not allowed to call this
    372:    function again.

    374:    The vectors are copied one by one and then orthogonalized against the
    375:    previous ones. If any of them is linearly dependent then it is discarded
    376:    and the value of nc is decreased. The behaviour is similar to BVInsertVecs().

    378:    Level: advanced

    380: .seealso: BVInsertVecs(), BVOrthogonalizeColumn(), BVGetColumn(), BVGetNumConstraints()
    381: @*/
    382: PetscErrorCode BVInsertConstraints(BV V,PetscInt *nc,Vec *C)
    383: {
    385:   PetscInt       msave;

    391:   if (!*nc) return(0);
    392:   if (*nc<0) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Number of constraints (given %D) cannot be negative",*nc);
    396:   BVCheckSizes(V,1);
    398:   if (V->nc) SETERRQ(PetscObjectComm((PetscObject)V),PETSC_ERR_ARG_WRONGSTATE,"Constraints already present in this BV object");
    399:   if (V->ci[0]!=-1 || V->ci[1]!=-1) SETERRQ(PetscObjectComm((PetscObject)V),PETSC_ERR_SUP,"Cannot call BVInsertConstraints after BVGetColumn");

    401:   msave = V->m;
    402:   BVResize(V,*nc+V->m,PETSC_FALSE);
    403:   BVInsertVecs(V,0,nc,C,PETSC_TRUE);
    404:   V->nc = *nc;
    405:   V->m  = msave;
    406:   V->ci[0] = -V->nc-1;
    407:   V->ci[1] = -V->nc-1;
    408:   PetscObjectStateIncrease((PetscObject)V);
    409:   return(0);
    410: }

    414: /*@C
    415:    BVSetOptionsPrefix - Sets the prefix used for searching for all
    416:    BV options in the database.

    418:    Logically Collective on BV

    420:    Input Parameters:
    421: +  bv     - the basis vectors context
    422: -  prefix - the prefix string to prepend to all BV option requests

    424:    Notes:
    425:    A hyphen (-) must NOT be given at the beginning of the prefix name.
    426:    The first character of all runtime options is AUTOMATICALLY the
    427:    hyphen.

    429:    Level: advanced

    431: .seealso: BVAppendOptionsPrefix(), BVGetOptionsPrefix()
    432: @*/
    433: PetscErrorCode BVSetOptionsPrefix(BV bv,const char *prefix)
    434: {

    439:   PetscObjectSetOptionsPrefix((PetscObject)bv,prefix);
    440:   return(0);
    441: }

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

    449:    Logically Collective on BV

    451:    Input Parameters:
    452: +  bv     - the basis vectors context
    453: -  prefix - the prefix string to prepend to all BV 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
    458:    hyphen.

    460:    Level: advanced

    462: .seealso: BVSetOptionsPrefix(), BVGetOptionsPrefix()
    463: @*/
    464: PetscErrorCode BVAppendOptionsPrefix(BV bv,const char *prefix)
    465: {

    470:   PetscObjectAppendOptionsPrefix((PetscObject)bv,prefix);
    471:   return(0);
    472: }

    476: /*@C
    477:    BVGetOptionsPrefix - Gets the prefix used for searching for all
    478:    BV options in the database.

    480:    Not Collective

    482:    Input Parameters:
    483: .  bv - the basis vectors context

    485:    Output Parameters:
    486: .  prefix - pointer to the prefix string used, is returned

    488:    Note:
    489:    On the Fortran side, the user should pass in a string 'prefix' of
    490:    sufficient length to hold the prefix.

    492:    Level: advanced

    494: .seealso: BVSetOptionsPrefix(), BVAppendOptionsPrefix()
    495: @*/
    496: PetscErrorCode BVGetOptionsPrefix(BV bv,const char *prefix[])
    497: {

    503:   PetscObjectGetOptionsPrefix((PetscObject)bv,prefix);
    504:   return(0);
    505: }

    509: static PetscErrorCode BVView_Default(BV bv,PetscViewer viewer)
    510: {
    511:   PetscErrorCode    ierr;
    512:   PetscInt          j;
    513:   Vec               v;
    514:   PetscViewerFormat format;
    515:   PetscBool         isascii,ismatlab=PETSC_FALSE;
    516:   const char        *bvname,*name;

    519:   PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&isascii);
    520:   if (isascii) {
    521:     PetscViewerGetFormat(viewer,&format);
    522:     if (format == PETSC_VIEWER_ASCII_MATLAB) ismatlab = PETSC_TRUE;
    523:   }
    524:   if (ismatlab) {
    525:     PetscObjectGetName((PetscObject)bv,&bvname);
    526:     PetscViewerASCIIPrintf(viewer,"%s=[];\n",bvname);
    527:   }
    528:   for (j=-bv->nc;j<bv->m;j++) {
    529:     BVGetColumn(bv,j,&v);
    530:     VecView(v,viewer);
    531:     if (ismatlab) {
    532:       PetscObjectGetName((PetscObject)v,&name);
    533:       PetscViewerASCIIPrintf(viewer,"%s=[%s,%s];clear %s\n",bvname,bvname,name,name);
    534:     }
    535:     BVRestoreColumn(bv,j,&v);
    536:   }
    537:   return(0);
    538: }

    542: /*@C
    543:    BVView - Prints the BV data structure.

    545:    Collective on BV

    547:    Input Parameters:
    548: +  bv     - the BV context
    549: -  viewer - optional visualization context

    551:    Note:
    552:    The available visualization contexts include
    553: +     PETSC_VIEWER_STDOUT_SELF - standard output (default)
    554: -     PETSC_VIEWER_STDOUT_WORLD - synchronized standard
    555:          output where only the first processor opens
    556:          the file.  All other processors send their
    557:          data to the first processor to print.

    559:    The user can open an alternative visualization contexts with
    560:    PetscViewerASCIIOpen() (output to a specified file).

    562:    Level: beginner

    564: .seealso: PetscViewerASCIIOpen()
    565: @*/
    566: PetscErrorCode BVView(BV bv,PetscViewer viewer)
    567: {
    568:   PetscErrorCode    ierr;
    569:   PetscBool         isascii;
    570:   PetscViewerFormat format;
    571:   const char        *orthname[2] = {"classical","modified"};
    572:   const char        *refname[3] = {"if needed","never","always"};
    573:   const char        *borthname[2] = {"Gram-Schmidt","Cholesky"};

    577:   if (!viewer) {
    578:     PetscViewerASCIIGetStdout(PetscObjectComm((PetscObject)bv),&viewer);
    579:   }

    582:   PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&isascii);
    583:   if (isascii) {
    584:     PetscObjectPrintClassNamePrefixType((PetscObject)bv,viewer);
    585:     PetscViewerGetFormat(viewer,&format);
    586:     PetscViewerASCIIPushTab(viewer);
    587:     if (format == PETSC_VIEWER_ASCII_INFO || format == PETSC_VIEWER_ASCII_INFO_DETAIL) {
    588:       PetscViewerASCIIPrintf(viewer,"%D columns of global length %D\n",bv->m,bv->N);
    589:       if (bv->nc>0) {
    590:         PetscViewerASCIIPrintf(viewer,"number of constraints: %D\n",bv->nc);
    591:       }
    592:       PetscViewerASCIIPrintf(viewer,"vector orthogonalization method: %s Gram-Schmidt\n",orthname[bv->orthog_type]);
    593:       switch (bv->orthog_ref) {
    594:         case BV_ORTHOG_REFINE_IFNEEDED:
    595:           PetscViewerASCIIPrintf(viewer,"orthogonalization refinement: %s (eta: %g)\n",refname[bv->orthog_ref],(double)bv->orthog_eta);
    596:           break;
    597:         case BV_ORTHOG_REFINE_NEVER:
    598:         case BV_ORTHOG_REFINE_ALWAYS:
    599:           PetscViewerASCIIPrintf(viewer,"orthogonalization refinement: %s\n",refname[bv->orthog_ref]);
    600:           break;
    601:       }
    602:       PetscViewerASCIIPrintf(viewer,"block orthogonalization method: %s\n",borthname[bv->orthog_block]);
    603:       if (bv->matrix) {
    604:         if (bv->indef) {
    605:           PetscViewerASCIIPrintf(viewer,"indefinite inner product\n");
    606:         } else {
    607:           PetscViewerASCIIPrintf(viewer,"non-standard inner product\n");
    608:         }
    609:         PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO);
    610:         MatView(bv->matrix,viewer);
    611:         PetscViewerPopFormat(viewer);
    612:       }
    613:       switch (bv->vmm) {
    614:         case BV_MATMULT_VECS:
    615:           PetscViewerASCIIPrintf(viewer,"doing matmult as matrix-vector products\n");
    616:           break;
    617:         case BV_MATMULT_MAT:
    618:           PetscViewerASCIIPrintf(viewer,"doing matmult as a single matrix-matrix product\n");
    619:           break;
    620:         case BV_MATMULT_MAT_SAVE:
    621:           PetscViewerASCIIPrintf(viewer,"doing matmult as a single matrix-matrix product, saving aux matrices\n");
    622:           break;
    623:       }
    624:       if (bv->rrandom) {
    625:         PetscViewerASCIIPrintf(viewer,"generating random vectors independent of the number of processes\n");
    626:       }
    627:     } else {
    628:       if (bv->ops->view) { (*bv->ops->view)(bv,viewer); }
    629:       else { BVView_Default(bv,viewer); }
    630:     }
    631:     PetscViewerASCIIPopTab(viewer);
    632:   } else {
    633:     (*bv->ops->view)(bv,viewer);
    634:   }
    635:   return(0);
    636: }

    640: /*@C
    641:    BVRegister - Adds a new storage format to the BV package.

    643:    Not collective

    645:    Input Parameters:
    646: +  name     - name of a new user-defined BV
    647: -  function - routine to create context

    649:    Notes:
    650:    BVRegister() may be called multiple times to add several user-defined
    651:    basis vectors.

    653:    Level: advanced

    655: .seealso: BVRegisterAll()
    656: @*/
    657: PetscErrorCode BVRegister(const char *name,PetscErrorCode (*function)(BV))
    658: {

    662:   PetscFunctionListAdd(&BVList,name,function);
    663:   return(0);
    664: }

    668: PetscErrorCode BVAllocateWork_Private(BV bv,PetscInt s)
    669: {

    673:   if (s>bv->lwork) {
    674:     PetscFree(bv->work);
    675:     PetscMalloc1(s,&bv->work);
    676:     PetscLogObjectMemory((PetscObject)bv,(s-bv->lwork)*sizeof(PetscScalar));
    677:     bv->lwork = s;
    678:   }
    679:   return(0);
    680: }