Actual source code: svdprimme.c
slepc-3.21.0 2024-03-30
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: This file implements a wrapper to the PRIMME SVD solver
12: */
14: #include <slepc/private/svdimpl.h>
16: #include <primme.h>
18: #if defined(PETSC_USE_COMPLEX)
19: #if defined(PETSC_USE_REAL_SINGLE)
20: #define PRIMME_DRIVER cprimme_svds
21: #else
22: #define PRIMME_DRIVER zprimme_svds
23: #endif
24: #else
25: #if defined(PETSC_USE_REAL_SINGLE)
26: #define PRIMME_DRIVER sprimme_svds
27: #else
28: #define PRIMME_DRIVER dprimme_svds
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_svds_params primme; /* param struct */
38: PetscInt bs; /* block size */
39: primme_svds_preset_method method; /* primme method */
40: SVD svd; /* reference to the solver */
41: Vec x,y; /* auxiliary vectors */
42: } SVD_PRIMME;
44: static void multMatvec_PRIMME(void*,PRIMME_INT*,void*,PRIMME_INT*,int*,int*,struct primme_svds_params*,int*);
46: static void par_GlobalSumReal(void *sendBuf,void *recvBuf,int *count,primme_svds_params *primme,int *ierr)
47: {
48: if (sendBuf == recvBuf) {
49: *ierr = MPI_Allreduce(MPI_IN_PLACE,recvBuf,*count,MPIU_REAL,MPIU_SUM,PetscObjectComm((PetscObject)primme->commInfo));
50: } else {
51: *ierr = MPI_Allreduce(sendBuf,recvBuf,*count,MPIU_REAL,MPIU_SUM,PetscObjectComm((PetscObject)primme->commInfo));
52: }
53: }
55: #if defined(SLEPC_HAVE_PRIMME3)
56: static void par_broadcastReal(void *buf,int *count,primme_svds_params *primme,int *ierr)
57: {
58: *ierr = MPI_Bcast(buf,*count,MPIU_REAL,0/*root*/,PetscObjectComm((PetscObject)primme->commInfo));
59: }
60: #endif
62: #if defined(SLEPC_HAVE_PRIMME2p2)
63: static void convTestFun(double *sval,void *leftsvec,void *rightsvec,double *resNorm,
64: #if defined(SLEPC_HAVE_PRIMME3)
65: int *method,
66: #endif
67: int *isconv,struct primme_svds_params *primme,int *err)
68: {
69: PetscErrorCode ierr;
70: SVD svd = (SVD)primme->commInfo;
71: PetscReal sigma = sval?*sval:0.0;
72: PetscReal r = resNorm?*resNorm:HUGE_VAL,errest;
74: ierr = (*svd->converged)(svd,sigma,r,&errest,svd->convergedctx);
75: if (ierr) *err = 1;
76: else {
77: *isconv = (errest<=svd->tol?1:0);
78: *err = 0;
79: }
80: }
82: static void monitorFun(void *basisSvals,int *basisSize,int *basisFlags,int *iblock,int *blockSize,void *basisNorms,int *numConverged,void *lockedSvals,int *numLocked,int *lockedFlags,void *lockedNorms,int *inner_its,void *LSRes,
83: #if defined(SLEPC_HAVE_PRIMME3)
84: const char *msg,double *time,
85: #endif
86: primme_event *event,int *stage,struct primme_svds_params *primme,int *err)
87: {
89: PetscErrorCode ierr = PETSC_SUCCESS;
90: SVD svd = (SVD)primme->commInfo;
91: PetscInt i,k,nerrest;
93: *err = 1;
94: switch (*event) {
95: case primme_event_outer_iteration:
96: /* Update SVD */
97: svd->its = primme->stats.numOuterIterations;
98: if (numConverged) svd->nconv = *numConverged;
99: k = 0;
100: if (lockedSvals && numLocked) for (i=0; i<*numLocked && k<svd->ncv; i++) svd->sigma[k++] = ((PetscReal*)lockedSvals)[i];
101: nerrest = k;
102: if (iblock && blockSize) {
103: for (i=0; i<*blockSize && k+iblock[i]<svd->ncv; i++) svd->errest[k+iblock[i]] = ((PetscReal*)basisNorms)[i];
104: nerrest = k+(*blockSize>0?1+iblock[*blockSize-1]:0);
105: }
106: if (basisSvals && basisSize) for (i=0; i<*basisSize && k<svd->ncv; i++) svd->sigma[k++] = ((PetscReal*)basisSvals)[i];
107: /* Show progress */
108: ierr = SVDMonitor(svd,svd->its,numConverged?*numConverged:0,svd->sigma,svd->errest,nerrest);
109: break;
110: #if defined(SLEPC_HAVE_PRIMME3)
111: case primme_event_message:
112: /* Print PRIMME information messages */
113: ierr = PetscInfo(svd,"%s\n",msg);
114: break;
115: #endif
116: default:
117: break;
118: }
119: *err = (ierr!=0)? 1: 0;
120: }
121: #endif /* SLEPC_HAVE_PRIMME2p2 */
123: static void multMatvec_PRIMME(void *xa,PRIMME_INT *ldx,void *ya,PRIMME_INT *ldy,int *blockSize,int *transpose,struct primme_svds_params *primme,int *ierr)
124: {
125: PetscInt i;
126: SVD_PRIMME *ops = (SVD_PRIMME*)primme->matrix;
127: Vec x = ops->x,y = ops->y;
128: SVD svd = ops->svd;
130: PetscFunctionBegin;
131: for (i=0;i<*blockSize;i++) {
132: if (*transpose) {
133: PetscCallAbort(PetscObjectComm((PetscObject)svd),VecPlaceArray(y,(PetscScalar*)xa+(*ldx)*i));
134: PetscCallAbort(PetscObjectComm((PetscObject)svd),VecPlaceArray(x,(PetscScalar*)ya+(*ldy)*i));
135: PetscCallAbort(PetscObjectComm((PetscObject)svd),MatMult(svd->AT,y,x));
136: } else {
137: PetscCallAbort(PetscObjectComm((PetscObject)svd),VecPlaceArray(x,(PetscScalar*)xa+(*ldx)*i));
138: PetscCallAbort(PetscObjectComm((PetscObject)svd),VecPlaceArray(y,(PetscScalar*)ya+(*ldy)*i));
139: PetscCallAbort(PetscObjectComm((PetscObject)svd),MatMult(svd->A,x,y));
140: }
141: PetscCallAbort(PetscObjectComm((PetscObject)svd),VecResetArray(x));
142: PetscCallAbort(PetscObjectComm((PetscObject)svd),VecResetArray(y));
143: }
144: PetscFunctionReturnVoid();
145: }
147: static PetscErrorCode SVDSetUp_PRIMME(SVD svd)
148: {
149: PetscMPIInt numProcs,procID;
150: PetscInt n,m,nloc,mloc;
151: SVD_PRIMME *ops = (SVD_PRIMME*)svd->data;
152: primme_svds_params *primme = &ops->primme;
154: PetscFunctionBegin;
155: SVDCheckStandard(svd);
156: SVDCheckDefinite(svd);
157: PetscCallMPI(MPI_Comm_size(PetscObjectComm((PetscObject)svd),&numProcs));
158: PetscCallMPI(MPI_Comm_rank(PetscObjectComm((PetscObject)svd),&procID));
160: /* Check some constraints and set some default values */
161: PetscCall(MatGetSize(svd->A,&m,&n));
162: PetscCall(MatGetLocalSize(svd->A,&mloc,&nloc));
163: PetscCall(SVDSetDimensions_Default(svd));
164: if (svd->max_it==PETSC_DEFAULT) svd->max_it = PETSC_MAX_INT;
165: svd->leftbasis = PETSC_TRUE;
166: SVDCheckUnsupported(svd,SVD_FEATURE_STOPPING);
167: #if !defined(SLEPC_HAVE_PRIMME2p2)
168: if (svd->converged != SVDConvergedAbsolute) PetscCall(PetscInfo(svd,"Warning: using absolute convergence test\n"));
169: #endif
171: /* Transfer SLEPc options to PRIMME options */
172: primme_svds_free(primme);
173: primme_svds_initialize(primme);
174: primme->m = m;
175: primme->n = n;
176: primme->mLocal = mloc;
177: primme->nLocal = nloc;
178: primme->numSvals = svd->nsv;
179: primme->matrix = ops;
180: primme->commInfo = svd;
181: primme->maxMatvecs = svd->max_it;
182: #if !defined(SLEPC_HAVE_PRIMME2p2)
183: primme->eps = SlepcDefaultTol(svd->tol);
184: #endif
185: primme->numProcs = numProcs;
186: primme->procID = procID;
187: primme->printLevel = 1;
188: primme->matrixMatvec = multMatvec_PRIMME;
189: primme->globalSumReal = par_GlobalSumReal;
190: #if defined(SLEPC_HAVE_PRIMME3)
191: primme->broadcastReal = par_broadcastReal;
192: #endif
193: #if defined(SLEPC_HAVE_PRIMME2p2)
194: primme->convTestFun = convTestFun;
195: primme->monitorFun = monitorFun;
196: #endif
197: if (ops->bs > 0) primme->maxBlockSize = ops->bs;
199: switch (svd->which) {
200: case SVD_LARGEST:
201: primme->target = primme_svds_largest;
202: break;
203: case SVD_SMALLEST:
204: primme->target = primme_svds_smallest;
205: break;
206: }
208: /* If user sets mpd or ncv, maxBasisSize is modified */
209: if (svd->mpd!=PETSC_DEFAULT) {
210: primme->maxBasisSize = svd->mpd;
211: if (svd->ncv!=PETSC_DEFAULT) PetscCall(PetscInfo(svd,"Warning: 'ncv' is ignored by PRIMME\n"));
212: } else if (svd->ncv!=PETSC_DEFAULT) primme->maxBasisSize = svd->ncv;
214: PetscCheck(primme_svds_set_method(ops->method,(primme_preset_method)EPS_PRIMME_DEFAULT_MIN_TIME,PRIMME_DEFAULT_METHOD,primme)>=0,PetscObjectComm((PetscObject)svd),PETSC_ERR_SUP,"PRIMME method not valid");
216: svd->mpd = primme->maxBasisSize;
217: svd->ncv = (primme->locking?svd->nsv:0)+primme->maxBasisSize;
218: ops->bs = primme->maxBlockSize;
220: /* Set workspace */
221: PetscCall(SVDAllocateSolution(svd,0));
223: /* Prepare auxiliary vectors */
224: if (!ops->x) PetscCall(MatCreateVecsEmpty(svd->A,&ops->x,&ops->y));
225: PetscFunctionReturn(PETSC_SUCCESS);
226: }
228: static PetscErrorCode SVDSolve_PRIMME(SVD svd)
229: {
230: SVD_PRIMME *ops = (SVD_PRIMME*)svd->data;
231: PetscScalar *svecs, *a;
232: PetscInt i,ierrprimme,ld;
233: PetscReal *svals,*rnorms;
235: PetscFunctionBegin;
236: /* Reset some parameters left from previous runs */
237: ops->primme.aNorm = 0.0;
238: ops->primme.initSize = svd->nini;
239: ops->primme.iseed[0] = -1;
240: ops->primme.iseed[1] = -1;
241: ops->primme.iseed[2] = -1;
242: ops->primme.iseed[3] = -1;
244: /* Allocating left and right singular vectors contiguously */
245: PetscCall(PetscCalloc1(ops->primme.numSvals*(ops->primme.mLocal+ops->primme.nLocal),&svecs));
247: /* Call PRIMME solver */
248: PetscCall(PetscMalloc2(svd->ncv,&svals,svd->ncv,&rnorms));
249: ierrprimme = PRIMME_DRIVER(svals,svecs,rnorms,&ops->primme);
250: for (i=0;i<svd->ncv;i++) svd->sigma[i] = svals[i];
251: for (i=0;i<svd->ncv;i++) svd->errest[i] = rnorms[i];
252: PetscCall(PetscFree2(svals,rnorms));
254: /* Copy left and right singular vectors into svd */
255: PetscCall(BVGetLeadingDimension(svd->U,&ld));
256: PetscCall(BVGetArray(svd->U,&a));
257: for (i=0;i<ops->primme.initSize;i++) PetscCall(PetscArraycpy(a+i*ld,svecs+i*ops->primme.mLocal,ops->primme.mLocal));
258: PetscCall(BVRestoreArray(svd->U,&a));
260: PetscCall(BVGetLeadingDimension(svd->V,&ld));
261: PetscCall(BVGetArray(svd->V,&a));
262: for (i=0;i<ops->primme.initSize;i++) PetscCall(PetscArraycpy(a+i*ld,svecs+ops->primme.mLocal*ops->primme.initSize+i*ops->primme.nLocal,ops->primme.nLocal));
263: PetscCall(BVRestoreArray(svd->V,&a));
265: PetscCall(PetscFree(svecs));
267: svd->nconv = ops->primme.initSize >= 0 ? ops->primme.initSize : 0;
268: svd->reason = svd->nconv >= svd->nsv ? SVD_CONVERGED_TOL: SVD_DIVERGED_ITS;
269: svd->its = ops->primme.stats.numOuterIterations;
271: /* Process PRIMME error code */
272: if (ierrprimme != 0) {
273: switch (ierrprimme%100) {
274: case -1:
275: SETERRQ(PetscObjectComm((PetscObject)svd),PETSC_ERR_LIB,"PRIMME library failed with error code=%" PetscInt_FMT ": unexpected error",ierrprimme);
276: case -2:
277: SETERRQ(PetscObjectComm((PetscObject)svd),PETSC_ERR_LIB,"PRIMME library failed with error code=%" PetscInt_FMT ": allocation error",ierrprimme);
278: case -3: /* stop due to maximum number of iterations or matvecs */
279: break;
280: default:
281: PetscCheck(ierrprimme<-39,PetscObjectComm((PetscObject)svd),PETSC_ERR_LIB,"PRIMME library failed with error code=%" PetscInt_FMT ": configuration error; check PRIMME's manual",ierrprimme);
282: PetscCheck(ierrprimme>=-39,PetscObjectComm((PetscObject)svd),PETSC_ERR_LIB,"PRIMME library failed with error code=%" PetscInt_FMT ": runtime error; check PRIMME's manual",ierrprimme);
283: }
284: }
285: PetscFunctionReturn(PETSC_SUCCESS);
286: }
288: static PetscErrorCode SVDReset_PRIMME(SVD svd)
289: {
290: SVD_PRIMME *ops = (SVD_PRIMME*)svd->data;
292: PetscFunctionBegin;
293: primme_svds_free(&ops->primme);
294: PetscCall(VecDestroy(&ops->x));
295: PetscCall(VecDestroy(&ops->y));
296: PetscFunctionReturn(PETSC_SUCCESS);
297: }
299: static PetscErrorCode SVDDestroy_PRIMME(SVD svd)
300: {
301: PetscFunctionBegin;
302: PetscCall(PetscFree(svd->data));
303: PetscCall(PetscObjectComposeFunction((PetscObject)svd,"SVDPRIMMESetBlockSize_C",NULL));
304: PetscCall(PetscObjectComposeFunction((PetscObject)svd,"SVDPRIMMEGetBlockSize_C",NULL));
305: PetscCall(PetscObjectComposeFunction((PetscObject)svd,"SVDPRIMMESetMethod_C",NULL));
306: PetscCall(PetscObjectComposeFunction((PetscObject)svd,"SVDPRIMMEGetMethod_C",NULL));
307: PetscFunctionReturn(PETSC_SUCCESS);
308: }
310: static PetscErrorCode SVDView_PRIMME(SVD svd,PetscViewer viewer)
311: {
312: PetscBool isascii;
313: SVD_PRIMME *ctx = (SVD_PRIMME*)svd->data;
314: PetscMPIInt rank;
316: PetscFunctionBegin;
317: PetscCall(PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&isascii));
318: if (isascii) {
319: PetscCall(PetscViewerASCIIPrintf(viewer," block size=%" PetscInt_FMT "\n",ctx->bs));
320: PetscCall(PetscViewerASCIIPrintf(viewer," solver method: %s\n",SVDPRIMMEMethods[(SVDPRIMMEMethod)ctx->method]));
322: /* Display PRIMME params */
323: PetscCallMPI(MPI_Comm_rank(PetscObjectComm((PetscObject)svd),&rank));
324: if (!rank) primme_svds_display_params(ctx->primme);
325: }
326: PetscFunctionReturn(PETSC_SUCCESS);
327: }
329: static PetscErrorCode SVDSetFromOptions_PRIMME(SVD svd,PetscOptionItems *PetscOptionsObject)
330: {
331: SVD_PRIMME *ctx = (SVD_PRIMME*)svd->data;
332: PetscInt bs;
333: SVDPRIMMEMethod meth;
334: PetscBool flg;
336: PetscFunctionBegin;
337: PetscOptionsHeadBegin(PetscOptionsObject,"SVD PRIMME Options");
339: PetscCall(PetscOptionsInt("-svd_primme_blocksize","Maximum block size","SVDPRIMMESetBlockSize",ctx->bs,&bs,&flg));
340: if (flg) PetscCall(SVDPRIMMESetBlockSize(svd,bs));
342: PetscCall(PetscOptionsEnum("-svd_primme_method","Method for solving the singular value problem","SVDPRIMMESetMethod",SVDPRIMMEMethods,(PetscEnum)ctx->method,(PetscEnum*)&meth,&flg));
343: if (flg) PetscCall(SVDPRIMMESetMethod(svd,meth));
345: PetscOptionsHeadEnd();
346: PetscFunctionReturn(PETSC_SUCCESS);
347: }
349: static PetscErrorCode SVDPRIMMESetBlockSize_PRIMME(SVD svd,PetscInt bs)
350: {
351: SVD_PRIMME *ops = (SVD_PRIMME*)svd->data;
353: PetscFunctionBegin;
354: if (bs == PETSC_DEFAULT) ops->bs = 0;
355: else {
356: PetscCheck(bs>0,PetscObjectComm((PetscObject)svd),PETSC_ERR_ARG_OUTOFRANGE,"PRIMME: block size must be positive");
357: ops->bs = bs;
358: }
359: PetscFunctionReturn(PETSC_SUCCESS);
360: }
362: /*@
363: SVDPRIMMESetBlockSize - The maximum block size that PRIMME will try to use.
365: Logically Collective
367: Input Parameters:
368: + svd - the singular value solver context
369: - bs - block size
371: Options Database Key:
372: . -svd_primme_blocksize - Sets the max allowed block size value
374: Notes:
375: If the block size is not set, the value established by primme_svds_initialize
376: is used.
378: The user should set the block size based on the architecture specifics
379: of the target computer, as well as any a priori knowledge of multiplicities.
380: The code does NOT require bs > 1 to find multiple eigenvalues. For some
381: methods, keeping bs = 1 yields the best overall performance.
383: Level: advanced
385: .seealso: SVDPRIMMEGetBlockSize()
386: @*/
387: PetscErrorCode SVDPRIMMESetBlockSize(SVD svd,PetscInt bs)
388: {
389: PetscFunctionBegin;
392: PetscTryMethod(svd,"SVDPRIMMESetBlockSize_C",(SVD,PetscInt),(svd,bs));
393: PetscFunctionReturn(PETSC_SUCCESS);
394: }
396: static PetscErrorCode SVDPRIMMEGetBlockSize_PRIMME(SVD svd,PetscInt *bs)
397: {
398: SVD_PRIMME *ops = (SVD_PRIMME*)svd->data;
400: PetscFunctionBegin;
401: *bs = ops->bs;
402: PetscFunctionReturn(PETSC_SUCCESS);
403: }
405: /*@
406: SVDPRIMMEGetBlockSize - Get the maximum block size the code will try to use.
408: Not Collective
410: Input Parameter:
411: . svd - the singular value solver context
413: Output Parameter:
414: . bs - returned block size
416: Level: advanced
418: .seealso: SVDPRIMMESetBlockSize()
419: @*/
420: PetscErrorCode SVDPRIMMEGetBlockSize(SVD svd,PetscInt *bs)
421: {
422: PetscFunctionBegin;
424: PetscAssertPointer(bs,2);
425: PetscUseMethod(svd,"SVDPRIMMEGetBlockSize_C",(SVD,PetscInt*),(svd,bs));
426: PetscFunctionReturn(PETSC_SUCCESS);
427: }
429: static PetscErrorCode SVDPRIMMESetMethod_PRIMME(SVD svd,SVDPRIMMEMethod method)
430: {
431: SVD_PRIMME *ops = (SVD_PRIMME*)svd->data;
433: PetscFunctionBegin;
434: ops->method = (primme_svds_preset_method)method;
435: PetscFunctionReturn(PETSC_SUCCESS);
436: }
438: /*@
439: SVDPRIMMESetMethod - Sets the method for the PRIMME SVD solver.
441: Logically Collective
443: Input Parameters:
444: + svd - the singular value solver context
445: - method - method that will be used by PRIMME
447: Options Database Key:
448: . -svd_primme_method - Sets the method for the PRIMME SVD solver
450: Note:
451: If not set, the method defaults to SVD_PRIMME_HYBRID.
453: Level: advanced
455: .seealso: SVDPRIMMEGetMethod(), SVDPRIMMEMethod
456: @*/
457: PetscErrorCode SVDPRIMMESetMethod(SVD svd,SVDPRIMMEMethod method)
458: {
459: PetscFunctionBegin;
462: PetscTryMethod(svd,"SVDPRIMMESetMethod_C",(SVD,SVDPRIMMEMethod),(svd,method));
463: PetscFunctionReturn(PETSC_SUCCESS);
464: }
466: static PetscErrorCode SVDPRIMMEGetMethod_PRIMME(SVD svd,SVDPRIMMEMethod *method)
467: {
468: SVD_PRIMME *ops = (SVD_PRIMME*)svd->data;
470: PetscFunctionBegin;
471: *method = (SVDPRIMMEMethod)ops->method;
472: PetscFunctionReturn(PETSC_SUCCESS);
473: }
475: /*@
476: SVDPRIMMEGetMethod - Gets the method for the PRIMME SVD solver.
478: Not Collective
480: Input Parameter:
481: . svd - the singular value solver context
483: Output Parameter:
484: . method - method that will be used by PRIMME
486: Level: advanced
488: .seealso: SVDPRIMMESetMethod(), SVDPRIMMEMethod
489: @*/
490: PetscErrorCode SVDPRIMMEGetMethod(SVD svd,SVDPRIMMEMethod *method)
491: {
492: PetscFunctionBegin;
494: PetscAssertPointer(method,2);
495: PetscUseMethod(svd,"SVDPRIMMEGetMethod_C",(SVD,SVDPRIMMEMethod*),(svd,method));
496: PetscFunctionReturn(PETSC_SUCCESS);
497: }
499: SLEPC_EXTERN PetscErrorCode SVDCreate_PRIMME(SVD svd)
500: {
501: SVD_PRIMME *primme;
503: PetscFunctionBegin;
504: PetscCall(PetscNew(&primme));
505: svd->data = (void*)primme;
507: primme_svds_initialize(&primme->primme);
508: primme->bs = 0;
509: primme->method = (primme_svds_preset_method)SVD_PRIMME_HYBRID;
510: primme->svd = svd;
512: svd->ops->solve = SVDSolve_PRIMME;
513: svd->ops->setup = SVDSetUp_PRIMME;
514: svd->ops->setfromoptions = SVDSetFromOptions_PRIMME;
515: svd->ops->destroy = SVDDestroy_PRIMME;
516: svd->ops->reset = SVDReset_PRIMME;
517: svd->ops->view = SVDView_PRIMME;
519: PetscCall(PetscObjectComposeFunction((PetscObject)svd,"SVDPRIMMESetBlockSize_C",SVDPRIMMESetBlockSize_PRIMME));
520: PetscCall(PetscObjectComposeFunction((PetscObject)svd,"SVDPRIMMEGetBlockSize_C",SVDPRIMMEGetBlockSize_PRIMME));
521: PetscCall(PetscObjectComposeFunction((PetscObject)svd,"SVDPRIMMESetMethod_C",SVDPRIMMESetMethod_PRIMME));
522: PetscCall(PetscObjectComposeFunction((PetscObject)svd,"SVDPRIMMEGetMethod_C",SVDPRIMMEGetMethod_PRIMME));
523: PetscFunctionReturn(PETSC_SUCCESS);
524: }