Actual source code: primme.c

slepc-3.14.2 2021-02-01
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  1: /*
  2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
  4:    Copyright (c) 2002-2020, 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:    This file implements a wrapper to the PRIMME package
 12: */

 14: #include <slepc/private/epsimpl.h>

 16: #include <primme.h>

 18: #if defined(PETSC_USE_COMPLEX)
 19: #if defined(PETSC_USE_REAL_SINGLE)
 20: #define PRIMME_DRIVER cprimme
 21: #else
 22: #define PRIMME_DRIVER zprimme
 23: #endif
 24: #else
 25: #if defined(PETSC_USE_REAL_SINGLE)
 26: #define PRIMME_DRIVER sprimme
 27: #else
 28: #define PRIMME_DRIVER dprimme
 29: #endif
 30: #endif

 32: #if defined(PRIMME_VERSION_MAJOR) && PRIMME_VERSION_MAJOR*100+PRIMME_VERSION_MINOR >= 202
 33: #define SLEPC_HAVE_PRIMME2p2
 34: #endif

 36: typedef struct {
 37:   primme_params        primme;    /* param struc */
 38:   PetscInt             bs;        /* block size */
 39:   primme_preset_method method;    /* primme method */
 40:   Mat                  A,B;       /* problem matrices */
 41:   KSP                  ksp;       /* linear solver and preconditioner */
 42:   Vec                  x,y;       /* auxiliary vectors */
 43:   double               target;    /* a copy of eps's target */
 44: } EPS_PRIMME;

 46: static void par_GlobalSumReal(void *sendBuf,void *recvBuf,int *count,primme_params *primme,int *ierr)
 47: {
 48:   if (sendBuf == recvBuf) {
 49:     *MPIU_Allreduce(MPI_IN_PLACE,recvBuf,*count,MPIU_REAL,MPIU_SUM,PetscObjectComm((PetscObject)primme->commInfo));CHKERRABORT(PetscObjectComm((PetscObject)primme->commInfo),*ierr);
 50:   } else {
 51:     *MPIU_Allreduce(sendBuf,recvBuf,*count,MPIU_REAL,MPIU_SUM,PetscObjectComm((PetscObject)primme->commInfo));CHKERRABORT(PetscObjectComm((PetscObject)primme->commInfo),*ierr);
 52:   }
 53: }

 55: #if defined(SLEPC_HAVE_PRIMME3)
 56: static void par_broadcastReal(void *buf,int *count,primme_params *primme,int *ierr)
 57: {
 58:   *MPI_Bcast(buf,*count,MPIU_REAL,0/*root*/,PetscObjectComm((PetscObject)primme->commInfo));CHKERRABORT(PetscObjectComm((PetscObject)primme->commInfo),*ierr);
 59: }
 60: #endif

 62: #if defined(SLEPC_HAVE_PRIMME2p2)
 63: static void convTestFun(double *eval,void *evec,double *resNorm,int *isconv,primme_params *primme,int *err)
 64: {
 66:   EPS            eps = (EPS)primme->commInfo;
 67:   PetscScalar    eigvr = eval?*eval:0.0;
 68:   PetscReal      r = resNorm?*resNorm:HUGE_VAL,errest;

 70:   *err = 1;
 71:   (*eps->converged)(eps,eigvr,0.0,r,&errest,eps->convergedctx);CHKERRABORT(PetscObjectComm((PetscObject)eps),ierr);
 72:   *isconv = (errest<=eps->tol?1:0);
 73:   *err = 0;
 74: }

 76: static void monitorFun(void *basisEvals,int *basisSize,int *basisFlags,int *iblock,int *blockSize,void *basisNorms,int *numConverged,void *lockedEvals,int *numLocked,int *lockedFlags,void *lockedNorms,int *inner_its,void *LSRes,
 77: #if defined(SLEPC_HAVE_PRIMME3)
 78:                        const char *msg,double *time,
 79: #endif
 80:                        primme_event *event,struct primme_params *primme,int *err)
 81: {
 83:   EPS            eps = (EPS)primme->commInfo;
 84:   PetscInt       i,k,nerrest;

 86:   *err = 1;
 87:   switch (*event) {
 88:     case primme_event_outer_iteration:
 89:       /* Update EPS */
 90:       eps->its = primme->stats.numOuterIterations;
 91:       eps->nconv = primme->initSize;
 92:       k=0;
 93:       if (lockedEvals && numLocked) for (i=0; i<*numLocked && k<eps->ncv; i++) eps->eigr[k++] = ((PetscReal*)lockedEvals)[i];
 94:       nerrest = k;
 95:       if (iblock && blockSize) {
 96:         for (i=0; i<*blockSize && k+iblock[i]<eps->ncv; i++) eps->errest[k+iblock[i]] = ((PetscReal*)basisNorms)[i];
 97:         nerrest = k+(*blockSize>0?1+iblock[*blockSize-1]:0);
 98:       }
 99:       if (basisEvals && basisSize) for (i=0; i<*basisSize && k<eps->ncv; i++) eps->eigr[k++] = ((PetscReal*)basisEvals)[i];
100:       /* Show progress */
101:       EPSMonitor(eps,eps->its,numConverged?*numConverged:0,eps->eigr,eps->eigi,eps->errest,nerrest);CHKERRABORT(PetscObjectComm((PetscObject)eps),ierr);
102:       break;
103: #if defined(SLEPC_HAVE_PRIMME3)
104:     case primme_event_message:
105:       /* Print PRIMME information messages */
106:       PetscInfo(eps,msg);CHKERRABORT(PetscObjectComm((PetscObject)eps),ierr);
107:       break;
108: #endif
109:     default:
110:       break;
111:   }
112:   *err = 0;
113: }
114: #endif /* SLEPC_HAVE_PRIMME2p2 */

116: static void matrixMatvec_PRIMME(void *xa,PRIMME_INT *ldx,void *ya,PRIMME_INT *ldy,int *blockSize,struct primme_params *primme,int *ierr)
117: {
118:   PetscInt   i;
119:   EPS_PRIMME *ops = (EPS_PRIMME*)primme->matrix;
120:   Vec        x = ops->x,y = ops->y;
121:   Mat        A = ops->A;

124:   for (i=0;i<*blockSize;i++) {
125:     *VecPlaceArray(x,(PetscScalar*)xa+(*ldx)*i);CHKERRABORT(PetscObjectComm((PetscObject)A),*ierr);
126:     *VecPlaceArray(y,(PetscScalar*)ya+(*ldy)*i);CHKERRABORT(PetscObjectComm((PetscObject)A),*ierr);
127:     *MatMult(A,x,y);CHKERRABORT(PetscObjectComm((PetscObject)A),*ierr);
128:     *VecResetArray(x);CHKERRABORT(PetscObjectComm((PetscObject)A),*ierr);
129:     *VecResetArray(y);CHKERRABORT(PetscObjectComm((PetscObject)A),*ierr);
130:   }
131:   PetscFunctionReturnVoid();
132: }

134: #if defined(SLEPC_HAVE_PRIMME3)
135: static void massMatrixMatvec_PRIMME(void *xa,PRIMME_INT *ldx,void *ya,PRIMME_INT *ldy,int *blockSize,struct primme_params *primme,int *ierr)
136: {
137:   PetscInt   i;
138:   EPS_PRIMME *ops = (EPS_PRIMME*)primme->massMatrix;
139:   Vec        x = ops->x,y = ops->y;
140:   Mat        B = ops->B;

143:   for (i=0;i<*blockSize;i++) {
144:     *VecPlaceArray(x,(PetscScalar*)xa+(*ldx)*i);CHKERRABORT(PetscObjectComm((PetscObject)B),*ierr);
145:     *VecPlaceArray(y,(PetscScalar*)ya+(*ldy)*i);CHKERRABORT(PetscObjectComm((PetscObject)B),*ierr);
146:     *MatMult(B,x,y);CHKERRABORT(PetscObjectComm((PetscObject)B),*ierr);
147:     *VecResetArray(x);CHKERRABORT(PetscObjectComm((PetscObject)B),*ierr);
148:     *VecResetArray(y);CHKERRABORT(PetscObjectComm((PetscObject)B),*ierr);
149:   }
150:   PetscFunctionReturnVoid();
151: }
152: #endif

154: static void applyPreconditioner_PRIMME(void *xa,PRIMME_INT *ldx,void *ya,PRIMME_INT *ldy,int *blockSize,struct primme_params *primme,int *ierr)
155: {
156:   PetscInt   i;
157:   EPS_PRIMME *ops = (EPS_PRIMME*)primme->matrix;
158:   Vec        x = ops->x,y = ops->y;

161:   for (i=0;i<*blockSize;i++) {
162:     *VecPlaceArray(x,(PetscScalar*)xa+(*ldx)*i);CHKERRABORT(PetscObjectComm((PetscObject)ops->ksp),*ierr);
163:     *VecPlaceArray(y,(PetscScalar*)ya+(*ldy)*i);CHKERRABORT(PetscObjectComm((PetscObject)ops->ksp),*ierr);
164:     *KSPSolve(ops->ksp,x,y);CHKERRABORT(PetscObjectComm((PetscObject)ops->ksp),*ierr);
165:     *VecResetArray(x);CHKERRABORT(PetscObjectComm((PetscObject)ops->ksp),*ierr);
166:     *VecResetArray(y);CHKERRABORT(PetscObjectComm((PetscObject)ops->ksp),*ierr);
167:   }
168:   PetscFunctionReturnVoid();
169: }

171: PetscErrorCode EPSSetUp_PRIMME(EPS eps)
172: {
174:   PetscMPIInt    numProcs,procID;
175:   EPS_PRIMME     *ops = (EPS_PRIMME*)eps->data;
176:   primme_params  *primme = &ops->primme;
177:   PetscBool      flg;

180:   EPSCheckHermitianDefinite(eps);
181:   MPI_Comm_size(PetscObjectComm((PetscObject)eps),&numProcs);
182:   MPI_Comm_rank(PetscObjectComm((PetscObject)eps),&procID);

184:   /* Check some constraints and set some default values */
185:   if (eps->max_it==PETSC_DEFAULT) eps->max_it = PETSC_MAX_INT;
186:   STGetMatrix(eps->st,0,&ops->A);
187:   if (eps->isgeneralized) {
188: #if defined(SLEPC_HAVE_PRIMME3)
189:     STGetMatrix(eps->st,1,&ops->B);
190: #else
191:     SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"This version of PRIMME is not available for generalized problems");
192: #endif
193:   }
194:   EPSCheckUnsupported(eps,EPS_FEATURE_ARBITRARY | EPS_FEATURE_REGION | EPS_FEATURE_STOPPING);
195:   EPSCheckIgnored(eps,EPS_FEATURE_BALANCE);
196:   if (!eps->which) eps->which = EPS_LARGEST_REAL;
197: #if !defined(SLEPC_HAVE_PRIMME2p2)
198:   if (eps->converged != EPSConvergedAbsolute) { PetscInfo(eps,"Warning: using absolute convergence test\n"); }
199: #else
200:   EPSCheckIgnored(eps,EPS_FEATURE_CONVERGENCE);
201: #endif

203:   /* Transfer SLEPc options to PRIMME options */
204:   primme_free(primme);
205:   primme_initialize(primme);
206:   primme->n                             = eps->n;
207:   primme->nLocal                        = eps->nloc;
208:   primme->numEvals                      = eps->nev;
209:   primme->matrix                        = ops;
210:   primme->matrixMatvec                  = matrixMatvec_PRIMME;
211: #if defined(SLEPC_HAVE_PRIMME3)
212:   if (eps->isgeneralized) {
213:     primme->massMatrix                  = ops;
214:     primme->massMatrixMatvec            = massMatrixMatvec_PRIMME;
215:   }
216: #endif
217:   primme->commInfo                      = eps;
218:   primme->maxOuterIterations            = eps->max_it;
219: #if !defined(SLEPC_HAVE_PRIMME2p2)
220:   primme->eps                           = eps->tol==PETSC_DEFAULT?SLEPC_DEFAULT_TOL:eps->tol;
221: #endif
222:   primme->numProcs                      = numProcs;
223:   primme->procID                        = procID;
224:   primme->printLevel                    = 1;
225:   primme->correctionParams.precondition = 1;
226:   primme->globalSumReal                 = par_GlobalSumReal;
227: #if defined(SLEPC_HAVE_PRIMME3)
228:   primme->broadcastReal                 = par_broadcastReal;
229: #endif
230: #if defined(SLEPC_HAVE_PRIMME2p2)
231:   primme->convTestFun                   = convTestFun;
232:   primme->monitorFun                    = monitorFun;
233: #endif
234:   if (ops->bs > 0) primme->maxBlockSize = ops->bs;

236:   switch (eps->which) {
237:     case EPS_LARGEST_REAL:
238:       primme->target = primme_largest;
239:       break;
240:     case EPS_SMALLEST_REAL:
241:       primme->target = primme_smallest;
242:       break;
243:     case EPS_LARGEST_MAGNITUDE:
244:       primme->target = primme_largest_abs;
245:       ops->target = 0.0;
246:       primme->numTargetShifts = 1;
247:       primme->targetShifts = &ops->target;
248:       break;
249:     case EPS_SMALLEST_MAGNITUDE:
250:       primme->target = primme_closest_abs;
251:       ops->target = 0.0;
252:       primme->numTargetShifts = 1;
253:       primme->targetShifts = &ops->target;
254:       break;
255:     case EPS_TARGET_MAGNITUDE:
256:     case EPS_TARGET_REAL:
257:       primme->target = primme_closest_abs;
258:       primme->numTargetShifts = 1;
259:       ops->target = PetscRealPart(eps->target);
260:       primme->targetShifts = &ops->target;
261:       break;
262:     default:
263:       SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"'which' value not supported by PRIMME");
264:   }

266:   switch (eps->extraction) {
267:     case EPS_RITZ:
268:       primme->projectionParams.projection = primme_proj_RR;
269:       break;
270:     case EPS_HARMONIC:
271:       primme->projectionParams.projection = primme_proj_harmonic;
272:       break;
273:     case EPS_REFINED:
274:       primme->projectionParams.projection = primme_proj_refined;
275:       break;
276:     default:
277:       SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"'extraction' value not supported by PRIMME");
278:   }

280:   /* If user sets mpd or ncv, maxBasisSize is modified */
281:   if (eps->mpd!=PETSC_DEFAULT) {
282:     primme->maxBasisSize = eps->mpd;
283:     if (eps->ncv!=PETSC_DEFAULT) { PetscInfo(eps,"Warning: 'ncv' is ignored by PRIMME\n"); }
284:   } else if (eps->ncv!=PETSC_DEFAULT) primme->maxBasisSize = eps->ncv;

286:   if (primme_set_method(ops->method,primme) < 0) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"PRIMME method not valid");

288:   eps->mpd = primme->maxBasisSize;
289:   eps->ncv = (primme->locking?eps->nev:0)+primme->maxBasisSize;
290:   ops->bs  = primme->maxBlockSize;

292:   /* Set workspace */
293:   EPSAllocateSolution(eps,0);

295:   /* Setup the preconditioner */
296:   if (primme->correctionParams.precondition) {
297:     STGetKSP(eps->st,&ops->ksp);
298:     PetscObjectTypeCompare((PetscObject)ops->ksp,KSPPREONLY,&flg);
299:     if (!flg) { PetscInfo(eps,"Warning: ignoring KSP, should use KSPPREONLY\n"); }
300:     primme->preconditioner = NULL;
301:     primme->applyPreconditioner = applyPreconditioner_PRIMME;
302:   }

304:   /* Prepare auxiliary vectors */
305:   if (!ops->x) {
306:     MatCreateVecsEmpty(ops->A,&ops->x,&ops->y);
307:     PetscLogObjectParent((PetscObject)eps,(PetscObject)ops->x);
308:     PetscLogObjectParent((PetscObject)eps,(PetscObject)ops->y);
309:   }
310:   return(0);
311: }

313: PetscErrorCode EPSSolve_PRIMME(EPS eps)
314: {
316:   EPS_PRIMME     *ops = (EPS_PRIMME*)eps->data;
317:   PetscScalar    *a;
318:   PetscInt       i,ierrprimme;
319:   PetscReal      *evals,*rnorms;

322:   /* Reset some parameters left from previous runs */
323: #if defined(SLEPC_HAVE_PRIMME2p2)
324:   ops->primme.aNorm    = 0.0;
325: #else
326:   /* Force PRIMME to stop by absolute error */
327:   ops->primme.aNorm    = 1.0;
328: #endif
329:   ops->primme.initSize = eps->nini;
330:   ops->primme.iseed[0] = -1;
331:   ops->primme.iseed[1] = -1;
332:   ops->primme.iseed[2] = -1;
333:   ops->primme.iseed[3] = -1;

335:   /* Call PRIMME solver */
336:   BVGetArray(eps->V,&a);
337:   PetscMalloc2(eps->ncv,&evals,eps->ncv,&rnorms);
338:   ierrprimme = PRIMME_DRIVER(evals,a,rnorms,&ops->primme);
339:   for (i=0;i<eps->ncv;i++) eps->eigr[i] = evals[i];
340:   for (i=0;i<eps->ncv;i++) eps->errest[i] = rnorms[i];
341:   PetscFree2(evals,rnorms);
342:   BVRestoreArray(eps->V,&a);

344:   eps->nconv  = ops->primme.initSize >= 0 ? ops->primme.initSize : 0;
345:   eps->reason = eps->nconv >= eps->nev ? EPS_CONVERGED_TOL: EPS_DIVERGED_ITS;
346:   eps->its    = ops->primme.stats.numOuterIterations;

348:   /* Process PRIMME error code */
349:   if (ierrprimme == 0) {
350:     /* no error */
351:   } else if (ierrprimme == -1) SETERRQ1(PetscObjectComm((PetscObject)eps),PETSC_ERR_LIB,"PRIMME library failed with error code=%d: unexpected error",ierrprimme);
352:   else if (ierrprimme == -2) SETERRQ1(PetscObjectComm((PetscObject)eps),PETSC_ERR_LIB,"PRIMME library failed with error code=%d: allocation error",ierrprimme);
353:   else if (ierrprimme == -3) {
354:     /* stop by maximum number of iteration or matvecs */
355:   } else if (ierrprimme >= -39) SETERRQ1(PetscObjectComm((PetscObject)eps),PETSC_ERR_LIB,"PRIMME library failed with error code=%d: configuration error; check PRIMME's manual",ierrprimme);
356:   else SETERRQ1(PetscObjectComm((PetscObject)eps),PETSC_ERR_LIB,"PRIMME library failed with error code=%d: runtime error; check PRIMME's manual",ierrprimme);
357:   return(0);
358: }

360: PetscErrorCode EPSReset_PRIMME(EPS eps)
361: {
363:   EPS_PRIMME     *ops = (EPS_PRIMME*)eps->data;

366:   primme_free(&ops->primme);
367:   VecDestroy(&ops->x);
368:   VecDestroy(&ops->y);
369:   return(0);
370: }

372: PetscErrorCode EPSDestroy_PRIMME(EPS eps)
373: {

377:   PetscFree(eps->data);
378:   PetscObjectComposeFunction((PetscObject)eps,"EPSPRIMMESetBlockSize_C",NULL);
379:   PetscObjectComposeFunction((PetscObject)eps,"EPSPRIMMESetMethod_C",NULL);
380:   PetscObjectComposeFunction((PetscObject)eps,"EPSPRIMMEGetBlockSize_C",NULL);
381:   PetscObjectComposeFunction((PetscObject)eps,"EPSPRIMMEGetMethod_C",NULL);
382:   return(0);
383: }

385: PetscErrorCode EPSView_PRIMME(EPS eps,PetscViewer viewer)
386: {
388:   PetscBool      isascii;
389:   EPS_PRIMME     *ctx = (EPS_PRIMME*)eps->data;
390:   PetscMPIInt    rank;

393:   PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&isascii);
394:   if (isascii) {
395:     PetscViewerASCIIPrintf(viewer,"  block size=%D\n",ctx->bs);
396:     PetscViewerASCIIPrintf(viewer,"  solver method: %s\n",EPSPRIMMEMethods[(EPSPRIMMEMethod)ctx->method]);

398:     /* Display PRIMME params */
399:     MPI_Comm_rank(PetscObjectComm((PetscObject)eps),&rank);
400:     if (!rank) primme_display_params(ctx->primme);
401:   }
402:   return(0);
403: }

405: PetscErrorCode EPSSetFromOptions_PRIMME(PetscOptionItems *PetscOptionsObject,EPS eps)
406: {
407:   PetscErrorCode  ierr;
408:   EPS_PRIMME      *ctx = (EPS_PRIMME*)eps->data;
409:   PetscInt        bs;
410:   EPSPRIMMEMethod meth;
411:   PetscBool       flg;

414:   PetscOptionsHead(PetscOptionsObject,"EPS PRIMME Options");

416:     PetscOptionsInt("-eps_primme_blocksize","Maximum block size","EPSPRIMMESetBlockSize",ctx->bs,&bs,&flg);
417:     if (flg) { EPSPRIMMESetBlockSize(eps,bs); }

419:     PetscOptionsEnum("-eps_primme_method","Method for solving the eigenproblem","EPSPRIMMESetMethod",EPSPRIMMEMethods,(PetscEnum)ctx->method,(PetscEnum*)&meth,&flg);
420:     if (flg) { EPSPRIMMESetMethod(eps,meth); }

422:   PetscOptionsTail();
423:   return(0);
424: }

426: static PetscErrorCode EPSPRIMMESetBlockSize_PRIMME(EPS eps,PetscInt bs)
427: {
428:   EPS_PRIMME *ops = (EPS_PRIMME*)eps->data;

431:   if (bs == PETSC_DEFAULT) ops->bs = 0;
432:   else if (bs <= 0) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"PRIMME: block size must be positive");
433:   else ops->bs = bs;
434:   return(0);
435: }

437: /*@
438:    EPSPRIMMESetBlockSize - The maximum block size that PRIMME will try to use.

440:    Logically Collective on eps

442:    Input Parameters:
443: +  eps - the eigenproblem solver context
444: -  bs - block size

446:    Options Database Key:
447: .  -eps_primme_blocksize - Sets the max allowed block size value

449:    Notes:
450:    If the block size is not set, the value established by primme_initialize
451:    is used.

453:    The user should set the block size based on the architecture specifics
454:    of the target computer, as well as any a priori knowledge of multiplicities.
455:    The code does NOT require bs > 1 to find multiple eigenvalues. For some
456:    methods, keeping bs = 1 yields the best overall performance.

458:    Level: advanced

460: .seealso: EPSPRIMMEGetBlockSize()
461: @*/
462: PetscErrorCode EPSPRIMMESetBlockSize(EPS eps,PetscInt bs)
463: {

469:   PetscTryMethod(eps,"EPSPRIMMESetBlockSize_C",(EPS,PetscInt),(eps,bs));
470:   return(0);
471: }

473: static PetscErrorCode EPSPRIMMEGetBlockSize_PRIMME(EPS eps,PetscInt *bs)
474: {
475:   EPS_PRIMME *ops = (EPS_PRIMME*)eps->data;

478:   *bs = ops->bs;
479:   return(0);
480: }

482: /*@
483:    EPSPRIMMEGetBlockSize - Get the maximum block size the code will try to use.

485:    Not Collective

487:    Input Parameter:
488: .  eps - the eigenproblem solver context

490:    Output Parameter:
491: .  bs - returned block size

493:    Level: advanced

495: .seealso: EPSPRIMMESetBlockSize()
496: @*/
497: PetscErrorCode EPSPRIMMEGetBlockSize(EPS eps,PetscInt *bs)
498: {

504:   PetscUseMethod(eps,"EPSPRIMMEGetBlockSize_C",(EPS,PetscInt*),(eps,bs));
505:   return(0);
506: }

508: static PetscErrorCode EPSPRIMMESetMethod_PRIMME(EPS eps,EPSPRIMMEMethod method)
509: {
510:   EPS_PRIMME *ops = (EPS_PRIMME*)eps->data;

513:   ops->method = (primme_preset_method)method;
514:   return(0);
515: }

517: /*@
518:    EPSPRIMMESetMethod - Sets the method for the PRIMME library.

520:    Logically Collective on eps

522:    Input Parameters:
523: +  eps - the eigenproblem solver context
524: -  method - method that will be used by PRIMME

526:    Options Database Key:
527: .  -eps_primme_method - Sets the method for the PRIMME library

529:    Note:
530:    If not set, the method defaults to EPS_PRIMME_DEFAULT_MIN_TIME.

532:    Level: advanced

534: .seealso: EPSPRIMMEGetMethod(), EPSPRIMMEMethod
535: @*/
536: PetscErrorCode EPSPRIMMESetMethod(EPS eps,EPSPRIMMEMethod method)
537: {

543:   PetscTryMethod(eps,"EPSPRIMMESetMethod_C",(EPS,EPSPRIMMEMethod),(eps,method));
544:   return(0);
545: }

547: static PetscErrorCode EPSPRIMMEGetMethod_PRIMME(EPS eps,EPSPRIMMEMethod *method)
548: {
549:   EPS_PRIMME *ops = (EPS_PRIMME*)eps->data;

552:   *method = (EPSPRIMMEMethod)ops->method;
553:   return(0);
554: }

556: /*@
557:    EPSPRIMMEGetMethod - Gets the method for the PRIMME library.

559:    Not Collective

561:    Input Parameter:
562: .  eps - the eigenproblem solver context

564:    Output Parameter:
565: .  method - method that will be used by PRIMME

567:    Level: advanced

569: .seealso: EPSPRIMMESetMethod(), EPSPRIMMEMethod
570: @*/
571: PetscErrorCode EPSPRIMMEGetMethod(EPS eps,EPSPRIMMEMethod *method)
572: {

578:   PetscUseMethod(eps,"EPSPRIMMEGetMethod_C",(EPS,EPSPRIMMEMethod*),(eps,method));
579:   return(0);
580: }

582: SLEPC_EXTERN PetscErrorCode EPSCreate_PRIMME(EPS eps)
583: {
585:   EPS_PRIMME     *primme;

588:   PetscNewLog(eps,&primme);
589:   eps->data = (void*)primme;

591:   primme_initialize(&primme->primme);
592:   primme->primme.globalSumReal = par_GlobalSumReal;
593: #if defined(SLEPC_HAVE_PRIMME3)
594:   primme->primme.broadcastReal = par_broadcastReal;
595: #endif
596: #if defined(SLEPC_HAVE_PRIMME2p2)
597:   primme->primme.convTestFun = convTestFun;
598:   primme->primme.monitorFun = monitorFun;
599: #endif
600:   primme->method = (primme_preset_method)EPS_PRIMME_DEFAULT_MIN_TIME;

602:   eps->categ = EPS_CATEGORY_PRECOND;

604:   eps->ops->solve          = EPSSolve_PRIMME;
605:   eps->ops->setup          = EPSSetUp_PRIMME;
606:   eps->ops->setupsort      = EPSSetUpSort_Basic;
607:   eps->ops->setfromoptions = EPSSetFromOptions_PRIMME;
608:   eps->ops->destroy        = EPSDestroy_PRIMME;
609:   eps->ops->reset          = EPSReset_PRIMME;
610:   eps->ops->view           = EPSView_PRIMME;
611:   eps->ops->backtransform  = EPSBackTransform_Default;
612:   eps->ops->setdefaultst   = EPSSetDefaultST_GMRES;

614:   PetscObjectComposeFunction((PetscObject)eps,"EPSPRIMMESetBlockSize_C",EPSPRIMMESetBlockSize_PRIMME);
615:   PetscObjectComposeFunction((PetscObject)eps,"EPSPRIMMESetMethod_C",EPSPRIMMESetMethod_PRIMME);
616:   PetscObjectComposeFunction((PetscObject)eps,"EPSPRIMMEGetBlockSize_C",EPSPRIMMEGetBlockSize_PRIMME);
617:   PetscObjectComposeFunction((PetscObject)eps,"EPSPRIMMEGetMethod_C",EPSPRIMMEGetMethod_PRIMME);
618:   return(0);
619: }