GCC Code Coverage Report


Directory: ./
File: src/eps/impls/ciss/ciss.c
Date: 2025-11-19 04:19:03
Exec Total Coverage
Lines: 764 828 92.3%
Functions: 38 39 97.4%
Branches: 2292 4358 52.6%

Line Branch Exec Source
1 /*
2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3 SLEPc - Scalable Library for Eigenvalue Problem Computations
4 Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
5
6 This file is part of SLEPc.
7 SLEPc is distributed under a 2-clause BSD license (see LICENSE).
8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9 */
10 /*
11 SLEPc eigensolver: "ciss"
12
13 Method: Contour Integral Spectral Slicing
14
15 Algorithm:
16
17 Contour integral based on Sakurai-Sugiura method to construct a
18 subspace, with various eigenpair extractions (Rayleigh-Ritz,
19 explicit moment).
20
21 Based on code contributed by Y. Maeda, T. Sakurai.
22
23 References:
24
25 [1] T. Sakurai and H. Sugiura, "A projection method for generalized
26 eigenvalue problems", J. Comput. Appl. Math. 159:119-128, 2003.
27
28 [2] T. Sakurai and H. Tadano, "CIRR: a Rayleigh-Ritz type method with
29 contour integral for generalized eigenvalue problems", Hokkaido
30 Math. J. 36:745-757, 2007.
31 */
32
33 #include <slepc/private/epsimpl.h> /*I "slepceps.h" I*/
34 #include <slepc/private/slepccontour.h>
35 #include <slepcblaslapack.h>
36
37 typedef struct {
38 /* user parameters */
39 PetscInt N; /* number of integration points (32) */
40 PetscInt L; /* block size (16) */
41 PetscInt M; /* moment degree (N/4 = 4) */
42 PetscReal delta; /* threshold of singular value (1e-12) */
43 PetscInt L_max; /* maximum number of columns of the source matrix V */
44 PetscReal spurious_threshold; /* discard spurious eigenpairs */
45 PetscBool isreal; /* A and B are real */
46 PetscInt npart; /* number of partitions */
47 PetscInt refine_inner;
48 PetscInt refine_blocksize;
49 EPSCISSQuadRule quad;
50 EPSCISSExtraction extraction;
51 PetscBool usest;
52 /* private data */
53 SlepcContourData contour;
54 PetscReal *sigma; /* threshold for numerical rank */
55 PetscScalar *weight;
56 PetscScalar *omega;
57 PetscScalar *pp;
58 BV V;
59 BV S;
60 BV pV;
61 BV Y;
62 PetscBool useconj;
63 PetscBool usest_set; /* whether the user set the usest flag or not */
64 PetscObjectId rgid;
65 PetscObjectState rgstate;
66 } EPS_CISS;
67
68 /*
69 Set up KSP solvers for every integration point, only called if !ctx->usest
70 */
71 157 static PetscErrorCode EPSCISSSetUp(EPS eps,Mat A,Mat B,Mat Pa,Mat Pb)
72 {
73 157 EPS_CISS *ctx = (EPS_CISS*)eps->data;
74 157 SlepcContourData contour;
75 157 PetscInt i,p_id,nsplit;
76 157 Mat Amat,Pmat;
77 157 MatStructure str,strp;
78
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157 PetscFunctionBegin;
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157 if (!ctx->contour || !ctx->contour->ksp) PetscCall(EPSCISSGetKSPs(eps,NULL,NULL));
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157 PetscAssert(ctx->contour && ctx->contour->ksp,PetscObjectComm((PetscObject)eps),PETSC_ERR_PLIB,"Something went wrong with EPSCISSGetKSPs()");
82 157 contour = ctx->contour;
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157 PetscCall(STGetMatStructure(eps->st,&str));
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157 PetscCall(STGetSplitPreconditionerInfo(eps->st,&nsplit,&strp));
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3601 for (i=0;i<contour->npoints;i++) {
86 3444 p_id = i*contour->subcomm->n + contour->subcomm->color;
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3444 PetscCall(MatDuplicate(A,MAT_COPY_VALUES,&Amat));
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3444 if (B) PetscCall(MatAXPY(Amat,-ctx->omega[p_id],B,str));
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2268 else PetscCall(MatShift(Amat,-ctx->omega[p_id]));
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3444 if (nsplit) {
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640 PetscCall(MatDuplicate(Pa,MAT_COPY_VALUES,&Pmat));
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640 if (Pb) PetscCall(MatAXPY(Pmat,-ctx->omega[p_id],Pb,strp));
93 else PetscCall(MatShift(Pmat,-ctx->omega[p_id]));
94 2804 } else Pmat = Amat;
95
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3444 PetscCall(EPS_KSPSetOperators(contour->ksp[i],Amat,Amat));
96
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3444 PetscCall(MatDestroy(&Amat));
97
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3444 if (nsplit) PetscCall(MatDestroy(&Pmat));
98 }
99
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35 PetscFunctionReturn(PETSC_SUCCESS);
100 }
101
102 /*
103 Y_i = (A-z_i B)^{-1}BV for every integration point, Y=[Y_i] is in the context
104 */
105 295 static PetscErrorCode EPSCISSSolve(EPS eps,Mat B,BV V,PetscInt L_start,PetscInt L_end)
106 {
107 295 EPS_CISS *ctx = (EPS_CISS*)eps->data;
108 295 SlepcContourData contour;
109 295 PetscInt i,p_id;
110 295 Mat MV,BMV=NULL,MC;
111 295 KSP ksp;
112
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295 PetscFunctionBegin;
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295 if (!ctx->contour || !ctx->contour->ksp) PetscCall(EPSCISSGetKSPs(eps,NULL,NULL));
115 295 contour = ctx->contour;
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295 PetscAssert(ctx->contour && ctx->contour->ksp,PetscObjectComm((PetscObject)eps),PETSC_ERR_PLIB,"Something went wrong with EPSCISSGetKSPs()");
117
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295 PetscCall(BVSetActiveColumns(V,L_start,L_end));
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295 PetscCall(BVGetMat(V,&MV));
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7755 for (i=0;i<contour->npoints;i++) {
120 7460 p_id = i*contour->subcomm->n + contour->subcomm->color;
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7460 if (ctx->usest) {
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3856 PetscCall(STSetShift(eps->st,ctx->omega[p_id]));
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3856 PetscCall(STGetKSP(eps->st,&ksp));
124 3604 } else ksp = contour->ksp[i];
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7460 PetscCall(BVSetActiveColumns(ctx->Y,i*ctx->L+L_start,i*ctx->L+L_end));
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7460 PetscCall(BVGetMat(ctx->Y,&MC));
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7460 if (B) {
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3496 if (!i) {
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138 PetscCall(MatProductCreate(B,MV,NULL,&BMV));
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138 PetscCall(MatProductSetType(BMV,MATPRODUCT_AB));
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138 PetscCall(MatProductSetFromOptions(BMV));
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138 PetscCall(MatProductSymbolic(BMV));
133 }
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3496 PetscCall(MatProductNumeric(BMV));
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3496 PetscCall(KSPMatSolve(ksp,BMV,MC));
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3964 } else PetscCall(KSPMatSolve(ksp,MV,MC));
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7460 PetscCall(BVRestoreMat(ctx->Y,&MC));
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7460 if (ctx->usest && i<contour->npoints-1) PetscCall(KSPReset(ksp));
139 }
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295 PetscCall(MatDestroy(&BMV));
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295 PetscCall(BVRestoreMat(V,&MV));
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63 PetscFunctionReturn(PETSC_SUCCESS);
143 }
144
145 570 static PetscErrorCode rescale_eig(EPS eps,PetscInt nv)
146 {
147 570 EPS_CISS *ctx = (EPS_CISS*)eps->data;
148 570 PetscInt i;
149 570 PetscScalar center;
150 570 PetscReal radius,a,b,c,d,rgscale;
151 #if defined(PETSC_USE_COMPLEX)
152 320 PetscReal start_ang,end_ang,vscale,theta;
153 #endif
154 570 PetscBool isring,isellipse,isinterval;
155
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570 PetscFunctionBegin;
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570 PetscCall(PetscObjectTypeCompare((PetscObject)eps->rg,RGELLIPSE,&isellipse));
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570 PetscCall(PetscObjectTypeCompare((PetscObject)eps->rg,RGRING,&isring));
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570 PetscCall(PetscObjectTypeCompare((PetscObject)eps->rg,RGINTERVAL,&isinterval));
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570 PetscCall(RGGetScale(eps->rg,&rgscale));
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570 if (isinterval) {
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190 PetscCall(RGIntervalGetEndpoints(eps->rg,NULL,NULL,&c,&d));
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190 if (c==d) {
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2176 for (i=0;i<nv;i++) {
165 #if defined(PETSC_USE_COMPLEX)
166 962 eps->eigr[i] = PetscRealPart(eps->eigr[i]);
167 #else
168 1040 eps->eigi[i] = 0;
169 #endif
170 }
171 }
172 }
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570 if (ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) {
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120 if (isellipse) {
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46 PetscCall(RGEllipseGetParameters(eps->rg,&center,&radius,NULL));
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382 for (i=0;i<nv;i++) eps->eigr[i] = rgscale*(center + radius*eps->eigr[i]);
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74 } else if (isinterval) {
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54 PetscCall(RGIntervalGetEndpoints(eps->rg,&a,&b,&c,&d));
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54 if (ctx->quad == EPS_CISS_QUADRULE_CHEBYSHEV) {
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210 for (i=0;i<nv;i++) {
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176 if (c==d) eps->eigr[i] = ((eps->eigr[i]+1.0)*(b-a)/2.0+a)*rgscale;
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176 if (a==b) {
183 #if defined(PETSC_USE_COMPLEX)
184 eps->eigr[i] = ((eps->eigr[i]+1.0)*(d-c)/2.0+c)*rgscale*PETSC_i;
185 #else
186
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116 SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"Integration points on a vertical line require complex arithmetic");
187 #endif
188 }
189 }
190 } else {
191 20 center = (b+a)/2.0+(d+c)/2.0*PETSC_PI;
192 40 radius = PetscSqrtReal(PetscPowRealInt((b-a)/2.0,2)+PetscPowRealInt((d-c)/2.0,2));
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140 for (i=0;i<nv;i++) eps->eigr[i] = center + radius*eps->eigr[i];
194 }
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20 } else if (isring) { /* only supported in complex scalars */
196 #if defined(PETSC_USE_COMPLEX)
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20 PetscCall(RGRingGetParameters(eps->rg,&center,&radius,&vscale,&start_ang,&end_ang,NULL));
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20 if (ctx->quad == EPS_CISS_QUADRULE_CHEBYSHEV) {
199 for (i=0;i<nv;i++) {
200 theta = (start_ang*2.0+(end_ang-start_ang)*(PetscRealPart(eps->eigr[i])+1.0))*PETSC_PI;
201 eps->eigr[i] = rgscale*center + (rgscale*radius+PetscImaginaryPart(eps->eigr[i]))*PetscCMPLX(PetscCosReal(theta),vscale*PetscSinReal(theta));
202 }
203 } else {
204
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170 for (i=0;i<nv;i++) eps->eigr[i] = rgscale*(center + radius*eps->eigr[i]);
205 }
206 #endif
207 52 }
208 }
209
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122 PetscFunctionReturn(PETSC_SUCCESS);
210 }
211
212 275 static PetscErrorCode EPSSetUp_CISS(EPS eps)
213 {
214 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
215 275 SlepcContourData contour;
216 275 PetscBool istrivial,isring,isellipse,isinterval,flg;
217 275 PetscReal c,d;
218 275 PetscInt nsplit;
219 275 PetscRandom rand;
220 275 PetscObjectId id;
221 275 PetscObjectState state;
222 275 Mat A[2],Psplit[2];
223 275 Vec v0;
224
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275 PetscFunctionBegin;
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275 EPSCheckNotStructured(eps);
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275 if (eps->ncv==PETSC_DETERMINE) {
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255 if (eps->nev==0) eps->nev = 1;
229 255 eps->ncv = ctx->L_max*ctx->M;
230
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255 if (eps->ncv>eps->n) {
231 174 eps->ncv = eps->n;
232 174 ctx->L_max = eps->ncv/ctx->M;
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174 PetscCheck(ctx->L_max,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Cannot adjust solver parameters, try setting a smaller value of M (moment size)");
234 }
235 } else {
236
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20 PetscCall(EPSSetDimensions_Default(eps,&eps->nev,&eps->ncv,&eps->mpd));
237 20 ctx->L_max = eps->ncv/ctx->M;
238
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20 if (!ctx->L_max) {
239 ctx->L_max = 1;
240 eps->ncv = ctx->L_max*ctx->M;
241 }
242 }
243 275 ctx->L = PetscMin(ctx->L,ctx->L_max);
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275 if (eps->max_it==PETSC_DETERMINE) eps->max_it = 5;
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275 if (eps->mpd==PETSC_DETERMINE) eps->mpd = eps->ncv;
246
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275 if (!eps->which) eps->which = EPS_ALL;
247
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275 PetscCheck(eps->which==EPS_ALL,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"This solver supports only computing all eigenvalues");
248
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275 EPSCheckUnsupported(eps,EPS_FEATURE_BALANCE | EPS_FEATURE_ARBITRARY | EPS_FEATURE_EXTRACTION | EPS_FEATURE_STOPPING | EPS_FEATURE_TWOSIDED);
249
250 /* check region */
251
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275 PetscCall(RGIsTrivial(eps->rg,&istrivial));
252
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275 PetscCheck(!istrivial,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"CISS requires a nontrivial region, e.g. -rg_type ellipse ...");
253
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275 PetscCall(RGGetComplement(eps->rg,&flg));
254
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275 PetscCheck(!flg,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"A region with complement flag set is not allowed");
255
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275 PetscCall(PetscObjectTypeCompare((PetscObject)eps->rg,RGELLIPSE,&isellipse));
256
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275 PetscCall(PetscObjectTypeCompare((PetscObject)eps->rg,RGRING,&isring));
257
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275 PetscCall(PetscObjectTypeCompare((PetscObject)eps->rg,RGINTERVAL,&isinterval));
258
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275 PetscCheck(isellipse || isring || isinterval,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Currently only implemented for interval, elliptic or ring regions");
259
260 /* if the region has changed, then reset contour data */
261
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275 PetscCall(PetscObjectGetId((PetscObject)eps->rg,&id));
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275 PetscCall(PetscObjectStateGet((PetscObject)eps->rg,&state));
263
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275 if (ctx->rgid && (id != ctx->rgid || state != ctx->rgstate)) {
264 PetscCall(SlepcContourDataDestroy(&ctx->contour));
265 PetscCall(PetscInfo(eps,"Resetting the contour data structure due to a change of region\n"));
266 ctx->rgid = id; ctx->rgstate = state;
267 }
268
269 #if !defined(PETSC_USE_COMPLEX)
270
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125 PetscCheck(!isring,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Ring region only supported for complex scalars");
271 #endif
272
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275 if (isinterval) {
273
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95 PetscCall(RGIntervalGetEndpoints(eps->rg,NULL,NULL,&c,&d));
274 #if !defined(PETSC_USE_COMPLEX)
275
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47 PetscCheck(c==d && c==0.0,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"In real scalars, endpoints of the imaginary axis must be both zero");
276 #endif
277
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95 if (!ctx->quad && c==d) ctx->quad = EPS_CISS_QUADRULE_CHEBYSHEV;
278 }
279
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275 if (!ctx->quad) ctx->quad = EPS_CISS_QUADRULE_TRAPEZOIDAL;
280
281 /* create contour data structure */
282
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275 if (!ctx->contour) {
283 PetscCall(RGCanUseConjugates(eps->rg,ctx->isreal,&ctx->useconj));
284 PetscCall(SlepcContourDataCreate(ctx->useconj?ctx->N/2:ctx->N,ctx->npart,(PetscObject)eps,&ctx->contour));
285 }
286
287
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275 PetscCall(EPSAllocateSolution(eps,0));
288
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275 PetscCall(BVGetRandomContext(eps->V,&rand)); /* make sure the random context is available when duplicating */
289
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275 if (ctx->weight) PetscCall(PetscFree4(ctx->weight,ctx->omega,ctx->pp,ctx->sigma));
290
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275 PetscCall(PetscMalloc4(ctx->N,&ctx->weight,ctx->N+1,&ctx->omega,ctx->N,&ctx->pp,ctx->L_max*ctx->M,&ctx->sigma));
291
292 /* allocate basis vectors */
293
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275 PetscCall(BVDestroy(&ctx->S));
294
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275 PetscCall(BVDuplicateResize(eps->V,ctx->L*ctx->M,&ctx->S));
295
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275 PetscCall(BVDestroy(&ctx->V));
296
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275 PetscCall(BVDuplicateResize(eps->V,ctx->L,&ctx->V));
297
298
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275 PetscCall(STGetMatrix(eps->st,0,&A[0]));
299
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275 PetscCall(MatIsShell(A[0],&flg));
300
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275 PetscCheck(!flg,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Matrix type shell is not supported in this solver");
301
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275 if (eps->isgeneralized) PetscCall(STGetMatrix(eps->st,1,&A[1]));
302
303
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275 if (!ctx->usest_set) ctx->usest = (ctx->npart>1)? PETSC_FALSE: PETSC_TRUE;
304
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275 PetscCheck(!ctx->usest || ctx->npart==1,PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"The usest flag is not supported when partitions > 1");
305
306 /* check if a user-defined split preconditioner has been set */
307
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275 PetscCall(STGetSplitPreconditionerInfo(eps->st,&nsplit,NULL));
308
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275 if (nsplit) {
309
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40 PetscCall(STGetSplitPreconditionerTerm(eps->st,0,&Psplit[0]));
310
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40 if (eps->isgeneralized) PetscCall(STGetSplitPreconditionerTerm(eps->st,1,&Psplit[1]));
311 }
312
313 275 contour = ctx->contour;
314
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647 PetscCall(SlepcContourRedundantMat(contour,eps->isgeneralized?2:1,A,nsplit?Psplit:NULL));
315
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275 if (contour->pA) {
316
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64 PetscCall(BVGetColumn(ctx->V,0,&v0));
317
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64 PetscCall(SlepcContourScatterCreate(contour,v0));
318
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64 PetscCall(BVRestoreColumn(ctx->V,0,&v0));
319
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64 PetscCall(BVDestroy(&ctx->pV));
320
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64 PetscCall(BVCreate(PetscObjectComm((PetscObject)contour->xsub),&ctx->pV));
321
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64 PetscCall(BVSetSizesFromVec(ctx->pV,contour->xsub,eps->n));
322
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64 PetscCall(BVSetFromOptions(ctx->pV));
323
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64 PetscCall(BVResize(ctx->pV,ctx->L,PETSC_FALSE));
324 }
325
326
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275 EPSCheckDefinite(eps);
327
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275 EPSCheckSinvertCondition(eps,ctx->usest," (with the usest flag set)");
328
329
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275 PetscCall(BVDestroy(&ctx->Y));
330
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275 if (contour->pA) {
331
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64 PetscCall(BVCreate(PetscObjectComm((PetscObject)contour->xsub),&ctx->Y));
332
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64 PetscCall(BVSetSizesFromVec(ctx->Y,contour->xsub,eps->n));
333
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64 PetscCall(BVSetFromOptions(ctx->Y));
334
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64 PetscCall(BVResize(ctx->Y,contour->npoints*ctx->L,PETSC_FALSE));
335
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211 } else PetscCall(BVDuplicateResize(eps->V,contour->npoints*ctx->L,&ctx->Y));
336
337
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275 if (ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) PetscCall(DSSetType(eps->ds,DSGNHEP));
338
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220 else if (eps->isgeneralized) {
339
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111 if (eps->ishermitian && eps->ispositive) PetscCall(DSSetType(eps->ds,DSGHEP));
340
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13 else PetscCall(DSSetType(eps->ds,DSGNHEP));
341 } else {
342
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109 if (eps->ishermitian) PetscCall(DSSetType(eps->ds,DSHEP));
343
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71 else PetscCall(DSSetType(eps->ds,DSNHEP));
344 }
345
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275 PetscCall(DSAllocate(eps->ds,eps->ncv));
346
347 #if !defined(PETSC_USE_COMPLEX)
348
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125 PetscCall(EPSSetWorkVecs(eps,3));
349
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125 if (!eps->ishermitian) PetscCall(PetscInfo(eps,"Warning: complex eigenvalues are not calculated exactly without --with-scalar-type=complex in PETSc\n"));
350 #else
351
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150 PetscCall(EPSSetWorkVecs(eps,2));
352 #endif
353
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59 PetscFunctionReturn(PETSC_SUCCESS);
354 }
355
356 275 static PetscErrorCode EPSSetUpSort_CISS(EPS eps)
357 {
358 275 SlepcSC sc;
359
360
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275 PetscFunctionBegin;
361 /* fill sorting criterion context */
362 275 eps->sc->comparison = SlepcCompareSmallestReal;
363 275 eps->sc->comparisonctx = NULL;
364 275 eps->sc->map = NULL;
365 275 eps->sc->mapobj = NULL;
366
367 /* fill sorting criterion for DS */
368
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275 PetscCall(DSGetSlepcSC(eps->ds,&sc));
369 275 sc->comparison = SlepcCompareLargestMagnitude;
370 275 sc->comparisonctx = NULL;
371 275 sc->map = NULL;
372 275 sc->mapobj = NULL;
373
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275 PetscFunctionReturn(PETSC_SUCCESS);
374 }
375
376 275 static PetscErrorCode EPSSolve_CISS(EPS eps)
377 {
378 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
379 275 SlepcContourData contour = ctx->contour;
380 275 Mat A,B,X,M,pA,pB,T,J,Pa=NULL,Pb=NULL;
381 275 BV V;
382 275 PetscInt i,j,ld,nmat,L_add=0,nv=0,L_base=ctx->L,inner,nlocal,*inside,nsplit;
383 275 PetscScalar *Mu,*H0,*H1=NULL,*rr,*temp;
384 275 PetscReal error,max_error,norm;
385 275 PetscBool *fl1;
386 275 Vec si,si1=NULL,w[3];
387 275 PetscRandom rand;
388 #if defined(PETSC_USE_COMPLEX)
389 150 PetscBool isellipse;
390 150 PetscReal est_eig,eta;
391 #else
392 125 PetscReal normi;
393 #endif
394
395
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275 PetscFunctionBegin;
396 275 w[0] = eps->work[0];
397 #if defined(PETSC_USE_COMPLEX)
398 150 w[1] = NULL;
399 #else
400 125 w[1] = eps->work[2];
401 #endif
402 275 w[2] = eps->work[1];
403
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275 PetscCall(VecGetLocalSize(w[0],&nlocal));
404
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275 PetscCall(DSGetLeadingDimension(eps->ds,&ld));
405
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447 PetscCall(RGComputeQuadrature(eps->rg,ctx->quad==EPS_CISS_QUADRULE_CHEBYSHEV?RG_QUADRULE_CHEBYSHEV:RG_QUADRULE_TRAPEZOIDAL,ctx->N,ctx->omega,ctx->pp,ctx->weight));
406
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275 PetscCall(STGetNumMatrices(eps->st,&nmat));
407
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275 PetscCall(STGetMatrix(eps->st,0,&A));
408
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275 if (nmat>1) PetscCall(STGetMatrix(eps->st,1,&B));
409 137 else B = NULL;
410
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275 J = (contour->pA && nmat>1)? contour->pA[1]: B;
411
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275 V = contour->pA? ctx->pV: ctx->V;
412
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275 if (!ctx->usest) {
413
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157 T = contour->pA? contour->pA[0]: A;
414
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157 PetscCall(STGetSplitPreconditionerInfo(eps->st,&nsplit,NULL));
415
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157 if (nsplit) {
416
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30 if (contour->pA) {
417 20 Pa = contour->pP[0];
418
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20 if (nsplit>1) Pb = contour->pP[1];
419 } else {
420
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10 PetscCall(STGetSplitPreconditionerTerm(eps->st,0,&Pa));
421
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10 if (nsplit>1) PetscCall(STGetSplitPreconditionerTerm(eps->st,1,&Pb));
422 }
423 }
424
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157 PetscCall(EPSCISSSetUp(eps,T,J,Pa,Pb));
425 }
426
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275 PetscCall(BVSetActiveColumns(ctx->V,0,ctx->L));
427
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275 PetscCall(BVSetRandomSign(ctx->V));
428
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275 PetscCall(BVGetRandomContext(ctx->V,&rand));
429
430
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275 if (contour->pA) PetscCall(BVScatter(ctx->V,ctx->pV,contour->scatterin,contour->xdup));
431
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275 PetscCall(EPSCISSSolve(eps,J,V,0,ctx->L));
432 #if defined(PETSC_USE_COMPLEX)
433
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150 PetscCall(PetscObjectTypeCompare((PetscObject)eps->rg,RGELLIPSE,&isellipse));
434
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150 if (isellipse) {
435
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89 PetscCall(BVTraceQuadrature(ctx->Y,ctx->V,ctx->L,ctx->L,ctx->weight,contour->scatterin,contour->subcomm,contour->npoints,ctx->useconj,&est_eig));
436
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89 PetscCall(PetscInfo(eps,"Estimated eigenvalue count: %f\n",(double)est_eig));
437 89 eta = PetscPowReal(10.0,-PetscLog10Real(eps->tol)/ctx->N);
438 89 L_add = PetscMax(0,(PetscInt)PetscCeilReal((est_eig*eta)/ctx->M)-ctx->L);
439
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89 if (L_add>ctx->L_max-ctx->L) {
440
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5 PetscCall(PetscInfo(eps,"Number of eigenvalues inside the contour path may be too large\n"));
441 5 L_add = ctx->L_max-ctx->L;
442 }
443 }
444 #endif
445
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214 if (L_add>0) {
446
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10 PetscCall(PetscInfo(eps,"Changing L %" PetscInt_FMT " -> %" PetscInt_FMT " by Estimate #Eig\n",ctx->L,ctx->L+L_add));
447
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10 PetscCall(BVCISSResizeBases(ctx->S,contour->pA?ctx->pV:ctx->V,ctx->Y,ctx->L,ctx->L+L_add,ctx->M,contour->npoints));
448
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10 PetscCall(BVSetActiveColumns(ctx->V,ctx->L,ctx->L+L_add));
449
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10 PetscCall(BVSetRandomSign(ctx->V));
450
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10 if (contour->pA) PetscCall(BVScatter(ctx->V,ctx->pV,contour->scatterin,contour->xdup));
451 10 ctx->L += L_add;
452
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135 PetscCall(EPSCISSSolve(eps,J,V,ctx->L-L_add,ctx->L));
453 }
454
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275 PetscCall(PetscMalloc2(ctx->L*ctx->L*ctx->M*2,&Mu,ctx->L*ctx->M*ctx->L*ctx->M,&H0));
455
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275 for (i=0;i<ctx->refine_blocksize;i++) {
456
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10 PetscCall(BVDotQuadrature(ctx->Y,(contour->pA)?ctx->pV:ctx->V,Mu,ctx->M,ctx->L,ctx->L,ctx->weight,ctx->pp,contour->subcomm,contour->npoints,ctx->useconj));
457
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10 PetscCall(CISS_BlockHankel(Mu,0,ctx->L,ctx->M,H0));
458
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10 PetscCall(PetscLogEventBegin(EPS_CISS_SVD,eps,0,0,0));
459
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10 PetscCall(SlepcCISS_BH_SVD(H0,ctx->L*ctx->M,ctx->delta,ctx->sigma,&nv));
460
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10 PetscCall(PetscLogEventEnd(EPS_CISS_SVD,eps,0,0,0));
461
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10 if (ctx->sigma[0]<=ctx->delta || nv < ctx->L*ctx->M || ctx->L == ctx->L_max) break;
462 L_add = L_base;
463 if (ctx->L+L_add>ctx->L_max) L_add = ctx->L_max-ctx->L;
464 PetscCall(PetscInfo(eps,"Changing L %" PetscInt_FMT " -> %" PetscInt_FMT " by SVD(H0)\n",ctx->L,ctx->L+L_add));
465 PetscCall(BVCISSResizeBases(ctx->S,contour->pA?ctx->pV:ctx->V,ctx->Y,ctx->L,ctx->L+L_add,ctx->M,contour->npoints));
466 PetscCall(BVSetActiveColumns(ctx->V,ctx->L,ctx->L+L_add));
467 PetscCall(BVSetRandomSign(ctx->V));
468 if (contour->pA) PetscCall(BVScatter(ctx->V,ctx->pV,contour->scatterin,contour->xdup));
469 ctx->L += L_add;
470 PetscCall(EPSCISSSolve(eps,J,V,ctx->L-L_add,ctx->L));
471 if (L_add) {
472 PetscCall(PetscFree2(Mu,H0));
473 PetscCall(PetscMalloc2(ctx->L*ctx->L*ctx->M*2,&Mu,ctx->L*ctx->M*ctx->L*ctx->M,&H0));
474 }
475 }
476
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275 if (ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) PetscCall(PetscMalloc1(ctx->L*ctx->M*ctx->L*ctx->M,&H1));
477
478 560 while (eps->reason == EPS_CONVERGED_ITERATING) {
479 285 eps->its++;
480
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285 for (inner=0;inner<=ctx->refine_inner;inner++) {
481
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285 if (ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) {
482
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60 PetscCall(BVDotQuadrature(ctx->Y,(contour->pA)?ctx->pV:ctx->V,Mu,ctx->M,ctx->L,ctx->L,ctx->weight,ctx->pp,contour->subcomm,contour->npoints,ctx->useconj));
483
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60 PetscCall(CISS_BlockHankel(Mu,0,ctx->L,ctx->M,H0));
484
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60 PetscCall(PetscLogEventBegin(EPS_CISS_SVD,eps,0,0,0));
485
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60 PetscCall(SlepcCISS_BH_SVD(H0,ctx->L*ctx->M,ctx->delta,ctx->sigma,&nv));
486
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60 PetscCall(PetscLogEventEnd(EPS_CISS_SVD,eps,0,0,0));
487 break;
488 } else {
489
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225 PetscCall(BVSumQuadrature(ctx->S,ctx->Y,ctx->M,ctx->L,ctx->L,ctx->weight,ctx->pp,contour->scatterin,contour->subcomm,contour->npoints,ctx->useconj));
490
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225 PetscCall(BVSetActiveColumns(ctx->S,0,ctx->L));
491
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225 PetscCall(BVSetActiveColumns(ctx->V,0,ctx->L));
492
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225 PetscCall(BVCopy(ctx->S,ctx->V));
493
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225 PetscCall(BVSVDAndRank(ctx->S,ctx->M,ctx->L,ctx->delta,BV_SVD_METHOD_REFINE,H0,ctx->sigma,&nv));
494
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225 if (ctx->sigma[0]>ctx->delta && nv==ctx->L*ctx->M && inner!=ctx->refine_inner) {
495 if (contour->pA) PetscCall(BVScatter(ctx->V,ctx->pV,contour->scatterin,contour->xdup));
496 PetscCall(EPSCISSSolve(eps,J,V,0,ctx->L));
497 } else break;
498 }
499 }
500 285 eps->nconv = 0;
501
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285 if (nv == 0) eps->reason = EPS_CONVERGED_TOL;
502 else {
503
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285 PetscCall(DSSetDimensions(eps->ds,nv,0,0));
504
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285 PetscCall(DSSetState(eps->ds,DS_STATE_RAW));
505
506
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285 if (ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) {
507
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60 PetscCall(CISS_BlockHankel(Mu,0,ctx->L,ctx->M,H0));
508
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60 PetscCall(CISS_BlockHankel(Mu,1,ctx->L,ctx->M,H1));
509
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60 PetscCall(DSGetArray(eps->ds,DS_MAT_A,&temp));
510
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451 for (j=0;j<nv;j++) {
511
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3086 for (i=0;i<nv;i++) {
512 2695 temp[i+j*ld] = H1[i+j*ctx->L*ctx->M];
513 }
514 }
515
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60 PetscCall(DSRestoreArray(eps->ds,DS_MAT_A,&temp));
516
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60 PetscCall(DSGetArray(eps->ds,DS_MAT_B,&temp));
517
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451 for (j=0;j<nv;j++) {
518
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3086 for (i=0;i<nv;i++) {
519 2695 temp[i+j*ld] = H0[i+j*ctx->L*ctx->M];
520 }
521 }
522
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60 PetscCall(DSRestoreArray(eps->ds,DS_MAT_B,&temp));
523 } else {
524
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225 PetscCall(BVSetActiveColumns(ctx->S,0,nv));
525
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225 PetscCall(DSGetMat(eps->ds,DS_MAT_A,&pA));
526
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225 PetscCall(MatZeroEntries(pA));
527
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225 PetscCall(BVMatProject(ctx->S,A,ctx->S,pA));
528
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225 PetscCall(DSRestoreMat(eps->ds,DS_MAT_A,&pA));
529
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225 if (B) {
530
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111 PetscCall(DSGetMat(eps->ds,DS_MAT_B,&pB));
531
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111 PetscCall(MatZeroEntries(pB));
532
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111 PetscCall(BVMatProject(ctx->S,B,ctx->S,pB));
533
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111 PetscCall(DSRestoreMat(eps->ds,DS_MAT_B,&pB));
534 }
535 }
536
537
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285 PetscCall(DSSolve(eps->ds,eps->eigr,eps->eigi));
538
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285 PetscCall(DSSynchronize(eps->ds,eps->eigr,eps->eigi));
539
540
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285 PetscCall(PetscMalloc3(nv,&fl1,nv,&inside,nv,&rr));
541
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285 PetscCall(rescale_eig(eps,nv));
542
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285 PetscCall(DSVectors(eps->ds,DS_MAT_X,NULL,NULL));
543
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285 PetscCall(DSGetMat(eps->ds,DS_MAT_X,&X));
544
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285 PetscCall(SlepcCISS_isGhost(X,nv,ctx->sigma,ctx->spurious_threshold,fl1));
545
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285 PetscCall(DSRestoreMat(eps->ds,DS_MAT_X,&X));
546
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285 PetscCall(RGCheckInside(eps->rg,nv,eps->eigr,eps->eigi,inside));
547
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7723 for (i=0;i<nv;i++) {
548
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7438 if (fl1[i] && inside[i]>=0) {
549 1853 rr[i] = 1.0;
550 1853 eps->nconv++;
551 5585 } else rr[i] = 0.0;
552 }
553
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285 PetscCall(DSSort(eps->ds,eps->eigr,eps->eigi,rr,NULL,&eps->nconv));
554
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285 PetscCall(DSSynchronize(eps->ds,eps->eigr,eps->eigi));
555
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285 PetscCall(rescale_eig(eps,nv));
556
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285 PetscCall(PetscFree3(fl1,inside,rr));
557
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285 PetscCall(BVSetActiveColumns(eps->V,0,nv));
558
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285 if (ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) {
559
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60 PetscCall(BVSumQuadrature(ctx->S,ctx->Y,ctx->M,ctx->L,ctx->L,ctx->weight,ctx->pp,contour->scatterin,contour->subcomm,contour->npoints,ctx->useconj));
560
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60 PetscCall(BVSetActiveColumns(ctx->S,0,ctx->L));
561
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60 PetscCall(BVCopy(ctx->S,ctx->V));
562
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60 PetscCall(BVSetActiveColumns(ctx->S,0,nv));
563 }
564
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285 PetscCall(BVCopy(ctx->S,eps->V));
565
566
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285 PetscCall(DSVectors(eps->ds,DS_MAT_X,NULL,NULL));
567
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285 PetscCall(DSGetMat(eps->ds,DS_MAT_X,&X));
568
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285 PetscCall(BVMultInPlace(ctx->S,X,0,eps->nconv));
569
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285 if (eps->ishermitian) PetscCall(BVMultInPlace(eps->V,X,0,eps->nconv));
570
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285 PetscCall(DSRestoreMat(eps->ds,DS_MAT_X,&X));
571 max_error = 0.0;
572
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2118 for (i=0;i<eps->nconv;i++) {
573
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1833 PetscCall(BVGetColumn(ctx->S,i,&si));
574 #if !defined(PETSC_USE_COMPLEX)
575
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705 if (eps->eigi[i]!=0.0) PetscCall(BVGetColumn(ctx->S,i+1,&si1));
576 #endif
577
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1833 PetscCall(EPSComputeResidualNorm_Private(eps,PETSC_FALSE,eps->eigr[i],eps->eigi[i],si,si1,w,&error));
578
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1833 if (ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) { /* vector is not normalized */
579
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280 PetscCall(VecNorm(si,NORM_2,&norm));
580 #if !defined(PETSC_USE_COMPLEX)
581
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111 if (eps->eigi[i]!=0.0) {
582 PetscCall(VecNorm(si1,NORM_2,&normi));
583 norm = SlepcAbsEigenvalue(norm,normi);
584 }
585 #endif
586 280 error /= norm;
587 }
588
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1833 PetscCall((*eps->converged)(eps,eps->eigr[i],eps->eigi[i],error,&error,eps->convergedctx));
589
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1833 PetscCall(BVRestoreColumn(ctx->S,i,&si));
590 #if !defined(PETSC_USE_COMPLEX)
591
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705 if (eps->eigi[i]!=0.0) {
592
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20 PetscCall(BVRestoreColumn(ctx->S,i+1,&si1));
593 i++;
594 }
595 #endif
596
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2517 max_error = PetscMax(max_error,error);
597 }
598
599
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285 if (max_error <= eps->tol) eps->reason = EPS_CONVERGED_TOL;
600
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12 else if (eps->its >= eps->max_it) eps->reason = EPS_DIVERGED_ITS;
601 else {
602
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10 if (eps->nconv > ctx->L) nv = eps->nconv;
603 else if (ctx->L > nv) nv = ctx->L;
604 10 nv = PetscMin(nv,ctx->L*ctx->M);
605
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10 PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,nv,ctx->L,NULL,&M));
606
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10 PetscCall(MatSetRandom(M,rand));
607
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10 PetscCall(BVSetActiveColumns(ctx->S,0,nv));
608
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10 PetscCall(BVMultInPlace(ctx->S,M,0,ctx->L));
609
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10 PetscCall(MatDestroy(&M));
610
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10 PetscCall(BVSetActiveColumns(ctx->S,0,ctx->L));
611
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10 PetscCall(BVSetActiveColumns(ctx->V,0,ctx->L));
612
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10 PetscCall(BVCopy(ctx->S,ctx->V));
613
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10 if (contour->pA) PetscCall(BVScatter(ctx->V,ctx->pV,contour->scatterin,contour->xdup));
614
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570 PetscCall(EPSCISSSolve(eps,J,V,0,ctx->L));
615 }
616 }
617 }
618
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275 if (ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) PetscCall(PetscFree(H1));
619
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275 PetscCall(PetscFree2(Mu,H0));
620
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59 PetscFunctionReturn(PETSC_SUCCESS);
621 }
622
623 275 static PetscErrorCode EPSComputeVectors_CISS(EPS eps)
624 {
625 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
626 275 PetscInt n;
627 275 Mat Z,B=NULL;
628
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275 PetscFunctionBegin;
630
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275 if (eps->ishermitian) {
631
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156 if (eps->isgeneralized && !eps->ispositive) PetscCall(EPSComputeVectors_Indefinite(eps));
632
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156 else PetscCall(EPSComputeVectors_Hermitian(eps));
633
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156 if (eps->isgeneralized && eps->ispositive && ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) {
634 /* normalize to have unit B-norm */
635
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20 PetscCall(STGetMatrix(eps->st,1,&B));
636
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20 PetscCall(BVSetMatrix(eps->V,B,PETSC_FALSE));
637
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20 PetscCall(BVNormalize(eps->V,NULL));
638
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20 PetscCall(BVSetMatrix(eps->V,NULL,PETSC_FALSE));
639 }
640
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156 PetscFunctionReturn(PETSC_SUCCESS);
641 }
642
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119 PetscCall(DSGetDimensions(eps->ds,&n,NULL,NULL,NULL));
643
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119 PetscCall(BVSetActiveColumns(eps->V,0,n));
644
645 /* right eigenvectors */
646
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119 PetscCall(DSVectors(eps->ds,DS_MAT_X,NULL,NULL));
647
648 /* V = V * Z */
649
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119 PetscCall(DSGetMat(eps->ds,DS_MAT_X,&Z));
650
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119 PetscCall(BVMultInPlace(eps->V,Z,0,n));
651
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119 PetscCall(DSRestoreMat(eps->ds,DS_MAT_X,&Z));
652
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119 PetscCall(BVSetActiveColumns(eps->V,0,eps->nconv));
653
654 /* normalize */
655
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119 if (ctx->extraction == EPS_CISS_EXTRACTION_HANKEL) PetscCall(BVNormalize(eps->V,NULL));
656
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25 PetscFunctionReturn(PETSC_SUCCESS);
657 }
658
659 116 static PetscErrorCode EPSCISSSetSizes_CISS(EPS eps,PetscInt ip,PetscInt bs,PetscInt ms,PetscInt npart,PetscInt bsmax,PetscBool realmats)
660 {
661 116 EPS_CISS *ctx = (EPS_CISS*)eps->data;
662 116 PetscInt oN,oL,oM,oLmax,onpart;
663 116 PetscMPIInt size;
664
665
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116 PetscFunctionBegin;
666 116 oN = ctx->N;
667
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116 if (ip == PETSC_DETERMINE) {
668 if (ctx->N!=32) { ctx->N =32; ctx->M = ctx->N/4; }
669
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116 } else if (ip != PETSC_CURRENT) {
670
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116 PetscCheck(ip>0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The ip argument must be > 0");
671
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116 PetscCheck(ip%2==0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The ip argument must be an even number");
672
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116 if (ctx->N!=ip) { ctx->N = ip; ctx->M = ctx->N/4; }
673 }
674 116 oL = ctx->L;
675
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116 if (bs == PETSC_DETERMINE) {
676 ctx->L = 16;
677
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116 } else if (bs != PETSC_CURRENT) {
678
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116 PetscCheck(bs>0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The bs argument must be > 0");
679 116 ctx->L = bs;
680 }
681 116 oM = ctx->M;
682
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116 if (ms == PETSC_DETERMINE) {
683 ctx->M = ctx->N/4;
684
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116 } else if (ms != PETSC_CURRENT) {
685
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116 PetscCheck(ms>0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The ms argument must be > 0");
686
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116 PetscCheck(ms<=ctx->N,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The ms argument must be less than or equal to the number of integration points");
687 116 ctx->M = ms;
688 }
689 116 onpart = ctx->npart;
690
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116 if (npart == PETSC_DETERMINE) {
691 ctx->npart = 1;
692
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116 } else if (npart != PETSC_CURRENT) {
693
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116 PetscCallMPI(MPI_Comm_size(PetscObjectComm((PetscObject)eps),&size));
694
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116 PetscCheck(npart>0 && npart<=size,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"Illegal value of npart");
695 116 ctx->npart = npart;
696 }
697 116 oLmax = ctx->L_max;
698
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116 if (bsmax == PETSC_DETERMINE) {
699 ctx->L_max = 64;
700
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116 } else if (bsmax != PETSC_CURRENT) {
701
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116 PetscCheck(bsmax>0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The bsmax argument must be > 0");
702 116 ctx->L_max = PetscMax(bsmax,ctx->L);
703 }
704
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116 if (onpart != ctx->npart || oN != ctx->N || realmats != ctx->isreal) {
705
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106 PetscCall(SlepcContourDataDestroy(&ctx->contour));
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106 PetscCall(PetscInfo(eps,"Resetting the contour data structure due to a change of parameters\n"));
707 106 eps->state = EPS_STATE_INITIAL;
708 }
709 116 ctx->isreal = realmats;
710
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116 if (oL != ctx->L || oM != ctx->M || oLmax != ctx->L_max) eps->state = EPS_STATE_INITIAL;
711
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28 PetscFunctionReturn(PETSC_SUCCESS);
712 }
713
714 /*@
715 EPSCISSSetSizes - Sets the values of various size parameters in the CISS solver.
716
717 Logically Collective
718
719 Input Parameters:
720 + eps - the linear eigensolver context
721 . ip - number of integration points
722 . bs - block size
723 . ms - moment size
724 . npart - number of partitions when splitting the communicator
725 . bsmax - max block size
726 - realmats - $A$ and $B$ are real
727
728 Options Database Keys:
729 + -eps_ciss_integration_points \<ip\> - sets the number of integration points
730 . -eps_ciss_blocksize \<bs\> - sets the block size
731 . -eps_ciss_moments \<ms\> - sets the moment size
732 . -eps_ciss_partitions \<npart\> - sets the number of partitions
733 . -eps_ciss_maxblocksize \<bsmax\> - sets the maximum block size
734 - -eps_ciss_realmats - $A$ and $B$ are real
735
736 Notes:
737 For all integer arguments, you can use `PETSC_CURRENT` to keep the current value, and
738 `PETSC_DETERMINE` to set them to a default value.
739
740 The default number of partitions is 1. This means the internal `KSP` object is shared
741 among all processes of the `EPS` communicator. Otherwise, the communicator is split
742 into `npart` communicators, so that `npart` `KSP` solves proceed simultaneously.
743
744 For a detailed description of the parameters see {cite:p}`Mae16`.
745
746 Level: advanced
747
748 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSGetSizes()`, `EPSCISSSetThreshold()`, `EPSCISSSetRefinement()`
749 @*/
750 116 PetscErrorCode EPSCISSSetSizes(EPS eps,PetscInt ip,PetscInt bs,PetscInt ms,PetscInt npart,PetscInt bsmax,PetscBool realmats)
751 {
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116 PetscFunctionBegin;
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116 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
754
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116 PetscValidLogicalCollectiveInt(eps,ip,2);
755
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116 PetscValidLogicalCollectiveInt(eps,bs,3);
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116 PetscValidLogicalCollectiveInt(eps,ms,4);
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116 PetscValidLogicalCollectiveInt(eps,npart,5);
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116 PetscValidLogicalCollectiveInt(eps,bsmax,6);
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116 PetscValidLogicalCollectiveBool(eps,realmats,7);
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116 PetscTryMethod(eps,"EPSCISSSetSizes_C",(EPS,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscBool),(eps,ip,bs,ms,npart,bsmax,realmats));
761
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116 PetscFunctionReturn(PETSC_SUCCESS);
762 }
763
764 275 static PetscErrorCode EPSCISSGetSizes_CISS(EPS eps,PetscInt *ip,PetscInt *bs,PetscInt *ms,PetscInt *npart,PetscInt *bsmax,PetscBool *realmats)
765 {
766 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
767
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275 PetscFunctionBegin;
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275 if (ip) *ip = ctx->N;
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275 if (bs) *bs = ctx->L;
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275 if (ms) *ms = ctx->M;
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275 if (npart) *npart = ctx->npart;
773
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275 if (bsmax) *bsmax = ctx->L_max;
774
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275 if (realmats) *realmats = ctx->isreal;
775
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275 PetscFunctionReturn(PETSC_SUCCESS);
776 }
777
778 /*@
779 EPSCISSGetSizes - Gets the values of various size parameters in the CISS solver.
780
781 Not Collective
782
783 Input Parameter:
784 . eps - the linear eigensolver context
785
786 Output Parameters:
787 + ip - number of integration points
788 . bs - block size
789 . ms - moment size
790 . npart - number of partitions when splitting the communicator
791 . bsmax - max block size
792 - realmats - $A$ and $B$ are real
793
794 Level: advanced
795
796 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSSetSizes()`
797 @*/
798 275 PetscErrorCode EPSCISSGetSizes(EPS eps,PetscInt *ip,PetscInt *bs,PetscInt *ms,PetscInt *npart,PetscInt *bsmax,PetscBool *realmats)
799 {
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275 PetscFunctionBegin;
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275 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
802
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275 PetscUseMethod(eps,"EPSCISSGetSizes_C",(EPS,PetscInt*,PetscInt*,PetscInt*,PetscInt*,PetscInt*,PetscBool*),(eps,ip,bs,ms,npart,bsmax,realmats));
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275 PetscFunctionReturn(PETSC_SUCCESS);
804 }
805
806 20 static PetscErrorCode EPSCISSSetThreshold_CISS(EPS eps,PetscReal delta,PetscReal spur)
807 {
808 20 EPS_CISS *ctx = (EPS_CISS*)eps->data;
809
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20 PetscFunctionBegin;
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20 if (delta == (PetscReal)PETSC_DETERMINE) {
812 ctx->delta = SLEPC_DEFAULT_TOL*1e-4;
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20 } else if (delta != (PetscReal)PETSC_CURRENT) {
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20 PetscCheck(delta>0.0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The delta argument must be > 0.0");
815 20 ctx->delta = delta;
816 }
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20 if (spur == (PetscReal)PETSC_DETERMINE) {
818 ctx->spurious_threshold = PetscSqrtReal(SLEPC_DEFAULT_TOL);
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20 } else if (spur != (PetscReal)PETSC_CURRENT) {
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20 PetscCheck(spur>0.0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The spurious threshold argument must be > 0.0");
821 20 ctx->spurious_threshold = spur;
822 }
823
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4 PetscFunctionReturn(PETSC_SUCCESS);
824 }
825
826 /*@
827 EPSCISSSetThreshold - Sets the values of various threshold parameters in
828 the CISS solver.
829
830 Logically Collective
831
832 Input Parameters:
833 + eps - the linear eigensolver context
834 . delta - threshold for numerical rank
835 - spur - spurious threshold (to discard spurious eigenpairs)
836
837 Options Database Keys:
838 + -eps_ciss_delta \<delta\> - sets the delta
839 - -eps_ciss_spurious_threshold \<spur\> - sets the spurious threshold
840
841 Notes:
842 `PETSC_CURRENT` can be used to preserve the current value of any of the
843 arguments, and `PETSC_DETERMINE` to set them to a default value.
844
845 For a detailed description of the parameters see {cite:p}`Mae16`.
846
847 Level: advanced
848
849 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSGetThreshold()`, `EPSCISSSetSizes()`, `EPSCISSSetRefinement()`
850 @*/
851 20 PetscErrorCode EPSCISSSetThreshold(EPS eps,PetscReal delta,PetscReal spur)
852 {
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20 PetscFunctionBegin;
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20 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
855
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20 PetscValidLogicalCollectiveReal(eps,delta,2);
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20 PetscValidLogicalCollectiveReal(eps,spur,3);
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20 PetscTryMethod(eps,"EPSCISSSetThreshold_C",(EPS,PetscReal,PetscReal),(eps,delta,spur));
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20 PetscFunctionReturn(PETSC_SUCCESS);
859 }
860
861 275 static PetscErrorCode EPSCISSGetThreshold_CISS(EPS eps,PetscReal *delta,PetscReal *spur)
862 {
863 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
864
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275 PetscFunctionBegin;
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275 if (delta) *delta = ctx->delta;
867
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275 if (spur) *spur = ctx->spurious_threshold;
868
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275 PetscFunctionReturn(PETSC_SUCCESS);
869 }
870
871 /*@
872 EPSCISSGetThreshold - Gets the values of various threshold parameters
873 in the CISS solver.
874
875 Not Collective
876
877 Input Parameter:
878 . eps - the linear eigensolver context
879
880 Output Parameters:
881 + delta - threshold for numerical rank
882 - spur - spurious threshold (to discard spurious eigenpairs)
883
884 Level: advanced
885
886 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSSetThreshold()`
887 @*/
888 275 PetscErrorCode EPSCISSGetThreshold(EPS eps,PetscReal *delta,PetscReal *spur)
889 {
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275 PetscFunctionBegin;
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275 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
892
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275 PetscUseMethod(eps,"EPSCISSGetThreshold_C",(EPS,PetscReal*,PetscReal*),(eps,delta,spur));
893
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275 PetscFunctionReturn(PETSC_SUCCESS);
894 }
895
896 10 static PetscErrorCode EPSCISSSetRefinement_CISS(EPS eps,PetscInt inner,PetscInt blsize)
897 {
898 10 EPS_CISS *ctx = (EPS_CISS*)eps->data;
899
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10 PetscFunctionBegin;
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10 if (inner == PETSC_DETERMINE) {
902 ctx->refine_inner = 0;
903
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10 } else if (inner != PETSC_CURRENT) {
904
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10 PetscCheck(inner>=0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The refine inner argument must be >= 0");
905 10 ctx->refine_inner = inner;
906 }
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10 if (blsize == PETSC_DETERMINE) {
908 ctx->refine_blocksize = 0;
909
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10 } else if (blsize != PETSC_CURRENT) {
910
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10 PetscCheck(blsize>=0,PetscObjectComm((PetscObject)eps),PETSC_ERR_ARG_OUTOFRANGE,"The refine blocksize argument must be >= 0");
911 10 ctx->refine_blocksize = blsize;
912 }
913
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2 PetscFunctionReturn(PETSC_SUCCESS);
914 }
915
916 /*@
917 EPSCISSSetRefinement - Sets the values of various refinement parameters
918 in the CISS solver.
919
920 Logically Collective
921
922 Input Parameters:
923 + eps - the linear eigensolver context
924 . inner - number of iterative refinement iterations (inner loop)
925 - blsize - number of iterative refinement iterations (blocksize loop)
926
927 Options Database Keys:
928 + -eps_ciss_refine_inner \<inner\> - sets number of inner iterations
929 - -eps_ciss_refine_blocksize \<blsize\> - sets number of blocksize iterations
930
931 Notes:
932 `PETSC_CURRENT` can be used to preserve the current value of any of the
933 arguments, and `PETSC_DETERMINE` to set them to a default of 0 (no refinement).
934
935 For a detailed description of the parameters see {cite:p}`Mae16`.
936
937 Level: advanced
938
939 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSGetRefinement()`, `EPSCISSSetSizes()`, `EPSCISSSetThreshold()`
940 @*/
941 10 PetscErrorCode EPSCISSSetRefinement(EPS eps,PetscInt inner,PetscInt blsize)
942 {
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10 PetscFunctionBegin;
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10 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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10 PetscValidLogicalCollectiveInt(eps,inner,2);
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10 PetscValidLogicalCollectiveInt(eps,blsize,3);
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10 PetscTryMethod(eps,"EPSCISSSetRefinement_C",(EPS,PetscInt,PetscInt),(eps,inner,blsize));
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10 PetscFunctionReturn(PETSC_SUCCESS);
949 }
950
951 275 static PetscErrorCode EPSCISSGetRefinement_CISS(EPS eps,PetscInt *inner,PetscInt *blsize)
952 {
953 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
954
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275 PetscFunctionBegin;
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275 if (inner) *inner = ctx->refine_inner;
957
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275 if (blsize) *blsize = ctx->refine_blocksize;
958
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275 PetscFunctionReturn(PETSC_SUCCESS);
959 }
960
961 /*@
962 EPSCISSGetRefinement - Gets the values of various refinement parameters
963 in the CISS solver.
964
965 Not Collective
966
967 Input Parameter:
968 . eps - the linear eigensolver context
969
970 Output Parameters:
971 + inner - number of iterative refinement iterations (inner loop)
972 - blsize - number of iterative refinement iterations (blocksize loop)
973
974 Level: advanced
975
976 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSSetRefinement()`
977 @*/
978 275 PetscErrorCode EPSCISSGetRefinement(EPS eps, PetscInt *inner, PetscInt *blsize)
979 {
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275 PetscFunctionBegin;
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275 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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275 PetscUseMethod(eps,"EPSCISSGetRefinement_C",(EPS,PetscInt*,PetscInt*),(eps,inner,blsize));
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275 PetscFunctionReturn(PETSC_SUCCESS);
984 }
985
986 103 static PetscErrorCode EPSCISSSetUseST_CISS(EPS eps,PetscBool usest)
987 {
988 103 EPS_CISS *ctx = (EPS_CISS*)eps->data;
989
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103 PetscFunctionBegin;
991 103 ctx->usest = usest;
992 103 ctx->usest_set = PETSC_TRUE;
993 103 eps->state = EPS_STATE_INITIAL;
994
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103 PetscFunctionReturn(PETSC_SUCCESS);
995 }
996
997 /*@
998 EPSCISSSetUseST - Sets a flag indicating that the CISS solver will
999 use the `ST` object for the linear solves.
1000
1001 Logically Collective
1002
1003 Input Parameters:
1004 + eps - the linear eigensolver context
1005 - usest - boolean flag to use the `ST` object or not
1006
1007 Options Database Key:
1008 . -eps_ciss_usest - whether the `ST` object will be used or not
1009
1010 Note:
1011 When this option is set, the linear solves can be configured by
1012 setting options for the `KSP` object obtained with `STGetKSP()`.
1013 Otherwise, several `KSP` objects are created, which can be accessed
1014 with `EPSCISSGetKSPs()`.
1015
1016 The default is to use the `ST`, unless several partitions have been
1017 specified, see `EPSCISSSetSizes()`.
1018
1019 Level: advanced
1020
1021 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSGetUseST()`, `EPSCISSSetSizes()`, `EPSCISSGetKSPs()`, `STGetKSP()`
1022 @*/
1023 103 PetscErrorCode EPSCISSSetUseST(EPS eps,PetscBool usest)
1024 {
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103 PetscFunctionBegin;
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103 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
1027
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103 PetscValidLogicalCollectiveBool(eps,usest,2);
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103 PetscTryMethod(eps,"EPSCISSSetUseST_C",(EPS,PetscBool),(eps,usest));
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103 PetscFunctionReturn(PETSC_SUCCESS);
1030 }
1031
1032 275 static PetscErrorCode EPSCISSGetUseST_CISS(EPS eps,PetscBool *usest)
1033 {
1034 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1035
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275 PetscFunctionBegin;
1037 275 *usest = ctx->usest;
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275 PetscFunctionReturn(PETSC_SUCCESS);
1039 }
1040
1041 /*@
1042 EPSCISSGetUseST - Gets the flag for using the `ST` object
1043 in the CISS solver.
1044
1045 Not Collective
1046
1047 Input Parameter:
1048 . eps - the linear eigensolver context
1049
1050 Output Parameter:
1051 . usest - boolean flag indicating if the `ST` object is being used
1052
1053 Level: advanced
1054
1055 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSSetUseST()`
1056 @*/
1057 275 PetscErrorCode EPSCISSGetUseST(EPS eps,PetscBool *usest)
1058 {
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275 PetscFunctionBegin;
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275 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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275 PetscAssertPointer(usest,2);
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275 PetscUseMethod(eps,"EPSCISSGetUseST_C",(EPS,PetscBool*),(eps,usest));
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275 PetscFunctionReturn(PETSC_SUCCESS);
1064 }
1065
1066 53 static PetscErrorCode EPSCISSSetQuadRule_CISS(EPS eps,EPSCISSQuadRule quad)
1067 {
1068 53 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1069
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53 PetscFunctionBegin;
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53 if (ctx->quad != quad) {
1072 53 ctx->quad = quad;
1073 53 eps->state = EPS_STATE_INITIAL;
1074 }
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53 PetscFunctionReturn(PETSC_SUCCESS);
1076 }
1077
1078 /*@
1079 EPSCISSSetQuadRule - Sets the quadrature rule used in the CISS solver.
1080
1081 Logically Collective
1082
1083 Input Parameters:
1084 + eps - the linear eigensolver context
1085 - quad - the quadrature rule, see `EPSCISSQuadRule` for possible values
1086
1087 Options Database Key:
1088 . -eps_ciss_quadrule \<quad\> - sets the quadrature rule, either `trapezoidal` or `chebyshev`
1089
1090 Notes:
1091 By default, the trapezoidal rule is used (`EPS_CISS_QUADRULE_TRAPEZOIDAL`).
1092
1093 If the `chebyshev` option is specified (`EPS_CISS_QUADRULE_CHEBYSHEV`), then
1094 Chebyshev points are used as quadrature points.
1095
1096 Level: advanced
1097
1098 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSGetQuadRule()`, `EPSCISSQuadRule`
1099 @*/
1100 53 PetscErrorCode EPSCISSSetQuadRule(EPS eps,EPSCISSQuadRule quad)
1101 {
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53 PetscFunctionBegin;
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53 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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53 PetscValidLogicalCollectiveEnum(eps,quad,2);
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53 PetscTryMethod(eps,"EPSCISSSetQuadRule_C",(EPS,EPSCISSQuadRule),(eps,quad));
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53 PetscFunctionReturn(PETSC_SUCCESS);
1107 }
1108
1109 10 static PetscErrorCode EPSCISSGetQuadRule_CISS(EPS eps,EPSCISSQuadRule *quad)
1110 {
1111 10 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1112
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10 PetscFunctionBegin;
1114 10 *quad = ctx->quad;
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10 PetscFunctionReturn(PETSC_SUCCESS);
1116 }
1117
1118 /*@
1119 EPSCISSGetQuadRule - Gets the quadrature rule used in the CISS solver.
1120
1121 Not Collective
1122
1123 Input Parameter:
1124 . eps - the linear eigensolver context
1125
1126 Output Parameter:
1127 . quad - quadrature rule
1128
1129 Level: advanced
1130
1131 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSSetQuadRule()`, `EPSCISSQuadRule`
1132 @*/
1133 10 PetscErrorCode EPSCISSGetQuadRule(EPS eps,EPSCISSQuadRule *quad)
1134 {
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10 PetscFunctionBegin;
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10 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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10 PetscAssertPointer(quad,2);
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10 PetscUseMethod(eps,"EPSCISSGetQuadRule_C",(EPS,EPSCISSQuadRule*),(eps,quad));
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10 PetscFunctionReturn(PETSC_SUCCESS);
1140 }
1141
1142 70 static PetscErrorCode EPSCISSSetExtraction_CISS(EPS eps,EPSCISSExtraction extraction)
1143 {
1144 70 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1145
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70 PetscFunctionBegin;
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70 if (ctx->extraction != extraction) {
1148 55 ctx->extraction = extraction;
1149 55 eps->state = EPS_STATE_INITIAL;
1150 }
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70 PetscFunctionReturn(PETSC_SUCCESS);
1152 }
1153
1154 /*@
1155 EPSCISSSetExtraction - Sets the extraction technique used in the CISS solver.
1156
1157 Logically Collective
1158
1159 Input Parameters:
1160 + eps - the linear eigensolver context
1161 - extraction - the extraction technique, see `EPSCISSExtraction` for possible values
1162
1163 Options Database Key:
1164 . -eps_ciss_extraction \<extraction\> - sets the extraction technique, either `ritz` or `hankel`
1165
1166 Notes:
1167 By default, the Rayleigh-Ritz extraction is used (`EPS_CISS_EXTRACTION_RITZ`),
1168 see {cite:p}`Sak07`.
1169
1170 If the `hankel` option is specified (`EPS_CISS_EXTRACTION_HANKEL`), then
1171 the block Hankel method is used for extracting eigenpairs {cite:p}`Sak03`.
1172
1173 Level: advanced
1174
1175 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSGetExtraction()`, `EPSCISSExtraction`
1176 @*/
1177 70 PetscErrorCode EPSCISSSetExtraction(EPS eps,EPSCISSExtraction extraction)
1178 {
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70 PetscFunctionBegin;
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70 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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70 PetscValidLogicalCollectiveEnum(eps,extraction,2);
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70 PetscTryMethod(eps,"EPSCISSSetExtraction_C",(EPS,EPSCISSExtraction),(eps,extraction));
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70 PetscFunctionReturn(PETSC_SUCCESS);
1184 }
1185
1186 10 static PetscErrorCode EPSCISSGetExtraction_CISS(EPS eps,EPSCISSExtraction *extraction)
1187 {
1188 10 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1189
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10 PetscFunctionBegin;
1191 10 *extraction = ctx->extraction;
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10 PetscFunctionReturn(PETSC_SUCCESS);
1193 }
1194
1195 /*@
1196 EPSCISSGetExtraction - Gets the extraction technique used in the CISS solver.
1197
1198 Not Collective
1199
1200 Input Parameter:
1201 . eps - the linear eigensolver context
1202
1203 Output Parameter:
1204 . extraction - extraction technique
1205
1206 Level: advanced
1207
1208 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSSetExtraction()`, `EPSCISSExtraction`
1209 @*/
1210 10 PetscErrorCode EPSCISSGetExtraction(EPS eps,EPSCISSExtraction *extraction)
1211 {
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10 PetscFunctionBegin;
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10 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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10 PetscAssertPointer(extraction,2);
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10 PetscUseMethod(eps,"EPSCISSGetExtraction_C",(EPS,EPSCISSExtraction*),(eps,extraction));
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10 PetscFunctionReturn(PETSC_SUCCESS);
1217 }
1218
1219 275 static PetscErrorCode EPSCISSGetKSPs_CISS(EPS eps,PetscInt *nsolve,KSP **ksp)
1220 {
1221 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1222 275 SlepcContourData contour;
1223 275 PetscInt i,nsplit;
1224 275 PC pc;
1225 275 MPI_Comm child;
1226
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275 PetscFunctionBegin;
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275 if (!ctx->contour) { /* initialize contour data structure first */
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275 PetscCall(RGCanUseConjugates(eps->rg,ctx->isreal,&ctx->useconj));
1230
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275 PetscCall(SlepcContourDataCreate(ctx->useconj?ctx->N/2:ctx->N,ctx->npart,(PetscObject)eps,&ctx->contour));
1231 }
1232 275 contour = ctx->contour;
1233
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275 if (!contour->ksp) {
1234
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275 PetscCall(PetscMalloc1(contour->npoints,&contour->ksp));
1235
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275 PetscCall(EPSGetST(eps,&eps->st));
1236
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275 PetscCall(STGetSplitPreconditionerInfo(eps->st,&nsplit,NULL));
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275 PetscCall(PetscSubcommGetChild(contour->subcomm,&child));
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7255 for (i=0;i<contour->npoints;i++) {
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6980 PetscCall(KSPCreate(child,&contour->ksp[i]));
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6980 PetscCall(PetscObjectIncrementTabLevel((PetscObject)contour->ksp[i],(PetscObject)eps,1));
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6980 PetscCall(KSPSetOptionsPrefix(contour->ksp[i],((PetscObject)eps)->prefix));
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6980 PetscCall(KSPAppendOptionsPrefix(contour->ksp[i],"eps_ciss_"));
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6980 PetscCall(PetscObjectSetOptions((PetscObject)contour->ksp[i],((PetscObject)eps)->options));
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6980 PetscCall(KSPSetErrorIfNotConverged(contour->ksp[i],PETSC_TRUE));
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9764 PetscCall(KSPSetTolerances(contour->ksp[i],SlepcDefaultTol(eps->tol),PETSC_CURRENT,PETSC_CURRENT,PETSC_CURRENT));
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6980 PetscCall(KSPGetPC(contour->ksp[i],&pc));
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6980 if (nsplit) {
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960 PetscCall(KSPSetType(contour->ksp[i],KSPBCGS));
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960 PetscCall(PCSetType(pc,PCBJACOBI));
1250 } else {
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6020 PetscCall(KSPSetType(contour->ksp[i],KSPPREONLY));
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6980 PetscCall(PCSetType(pc,PCLU));
1253 }
1254 }
1255 }
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275 if (nsolve) *nsolve = contour->npoints;
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275 if (ksp) *ksp = contour->ksp;
1258
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59 PetscFunctionReturn(PETSC_SUCCESS);
1259 }
1260
1261 /*@C
1262 EPSCISSGetKSPs - Retrieve the array of linear solver objects associated with
1263 the CISS solver.
1264
1265 Not Collective
1266
1267 Input Parameter:
1268 . eps - the linear eigensolver context
1269
1270 Output Parameters:
1271 + nsolve - number of solver objects
1272 - ksp - array of linear solver object
1273
1274 Note:
1275 The number of `KSP` solvers is equal to the number of integration points divided by
1276 the number of partitions, see `EPSCISSSetSizes()`. This value is halved in the case
1277 of real matrices with a region centered at the real axis.
1278
1279 Level: advanced
1280
1281 .seealso: [](ch:eps), `EPSCISS`, `EPSCISSSetSizes()`
1282 @*/
1283 275 PetscErrorCode EPSCISSGetKSPs(EPS eps,PetscInt *nsolve,KSP **ksp)
1284 {
1285
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275 PetscFunctionBegin;
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275 PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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275 PetscUseMethod(eps,"EPSCISSGetKSPs_C",(EPS,PetscInt*,KSP**),(eps,nsolve,ksp));
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275 PetscFunctionReturn(PETSC_SUCCESS);
1289 }
1290
1291 275 static PetscErrorCode EPSReset_CISS(EPS eps)
1292 {
1293 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1294
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275 PetscFunctionBegin;
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275 PetscCall(BVDestroy(&ctx->S));
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275 PetscCall(BVDestroy(&ctx->V));
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275 PetscCall(BVDestroy(&ctx->Y));
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275 if (!ctx->usest) PetscCall(SlepcContourDataReset(ctx->contour));
1300
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275 PetscCall(BVDestroy(&ctx->pV));
1301
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59 PetscFunctionReturn(PETSC_SUCCESS);
1302 }
1303
1304 275 static PetscErrorCode EPSSetFromOptions_CISS(EPS eps,PetscOptionItems PetscOptionsObject)
1305 {
1306 275 PetscReal r3,r4;
1307 275 PetscInt i,i1,i2,i3,i4,i5,i6,i7;
1308 275 PetscBool b1,b2,flg,flg2,flg3,flg4,flg5,flg6;
1309 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1310 275 EPSCISSQuadRule quad;
1311 275 EPSCISSExtraction extraction;
1312
1313
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275 PetscFunctionBegin;
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275 PetscOptionsHeadBegin(PetscOptionsObject,"EPS CISS Options");
1315
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275 PetscCall(EPSCISSGetSizes(eps,&i1,&i2,&i3,&i4,&i5,&b1));
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275 PetscCall(PetscOptionsInt("-eps_ciss_integration_points","Number of integration points","EPSCISSSetSizes",i1,&i1,&flg));
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275 PetscCall(PetscOptionsInt("-eps_ciss_blocksize","Block size","EPSCISSSetSizes",i2,&i2,&flg2));
1319
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275 PetscCall(PetscOptionsInt("-eps_ciss_moments","Moment size","EPSCISSSetSizes",i3,&i3,&flg3));
1320
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275 PetscCall(PetscOptionsInt("-eps_ciss_partitions","Number of partitions","EPSCISSSetSizes",i4,&i4,&flg4));
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275 PetscCall(PetscOptionsInt("-eps_ciss_maxblocksize","Maximum block size","EPSCISSSetSizes",i5,&i5,&flg5));
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275 PetscCall(PetscOptionsBool("-eps_ciss_realmats","True if A and B are real","EPSCISSSetSizes",b1,&b1,&flg6));
1323
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275 if (flg || flg2 || flg3 || flg4 || flg5 || flg6) PetscCall(EPSCISSSetSizes(eps,i1,i2,i3,i4,i5,b1));
1324
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275 PetscCall(EPSCISSGetThreshold(eps,&r3,&r4));
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275 PetscCall(PetscOptionsReal("-eps_ciss_delta","Threshold for numerical rank","EPSCISSSetThreshold",r3,&r3,&flg));
1327
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275 PetscCall(PetscOptionsReal("-eps_ciss_spurious_threshold","Threshold for the spurious eigenpairs","EPSCISSSetThreshold",r4,&r4,&flg2));
1328
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275 if (flg || flg2) PetscCall(EPSCISSSetThreshold(eps,r3,r4));
1329
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275 PetscCall(EPSCISSGetRefinement(eps,&i6,&i7));
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275 PetscCall(PetscOptionsInt("-eps_ciss_refine_inner","Number of inner iterative refinement iterations","EPSCISSSetRefinement",i6,&i6,&flg));
1332
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275 PetscCall(PetscOptionsInt("-eps_ciss_refine_blocksize","Number of blocksize iterative refinement iterations","EPSCISSSetRefinement",i7,&i7,&flg2));
1333
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275 if (flg || flg2) PetscCall(EPSCISSSetRefinement(eps,i6,i7));
1334
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275 PetscCall(EPSCISSGetUseST(eps,&b2));
1336
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275 PetscCall(PetscOptionsBool("-eps_ciss_usest","Use ST for linear solves","EPSCISSSetUseST",b2,&b2,&flg));
1337
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275 if (flg) PetscCall(EPSCISSSetUseST(eps,b2));
1338
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275 PetscCall(PetscOptionsEnum("-eps_ciss_quadrule","Quadrature rule","EPSCISSSetQuadRule",EPSCISSQuadRules,(PetscEnum)ctx->quad,(PetscEnum*)&quad,&flg));
1340
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275 if (flg) PetscCall(EPSCISSSetQuadRule(eps,quad));
1341
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275 PetscCall(PetscOptionsEnum("-eps_ciss_extraction","Extraction technique","EPSCISSSetExtraction",EPSCISSExtractions,(PetscEnum)ctx->extraction,(PetscEnum*)&extraction,&flg));
1343
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275 if (flg) PetscCall(EPSCISSSetExtraction(eps,extraction));
1344
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275 PetscOptionsHeadEnd();
1346
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275 if (!eps->rg) PetscCall(EPSGetRG(eps,&eps->rg));
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275 PetscCall(RGSetFromOptions(eps->rg)); /* this is necessary here to set useconj */
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275 if (!ctx->contour || !ctx->contour->ksp) PetscCall(EPSCISSGetKSPs(eps,NULL,NULL));
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59 PetscAssert(ctx->contour && ctx->contour->ksp,PetscObjectComm((PetscObject)eps),PETSC_ERR_PLIB,"Something went wrong with EPSCISSGetKSPs()");
1351
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7255 for (i=0;i<ctx->contour->npoints;i++) PetscCall(KSPSetFromOptions(ctx->contour->ksp[i]));
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275 PetscCall(PetscSubcommSetFromOptions(ctx->contour->subcomm));
1353
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59 PetscFunctionReturn(PETSC_SUCCESS);
1354 }
1355
1356 275 static PetscErrorCode EPSDestroy_CISS(EPS eps)
1357 {
1358 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1359
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275 PetscFunctionBegin;
1361
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275 PetscCall(SlepcContourDataDestroy(&ctx->contour));
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275 PetscCall(PetscFree4(ctx->weight,ctx->omega,ctx->pp,ctx->sigma));
1363
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275 PetscCall(PetscFree(eps->data));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetSizes_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetSizes_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetThreshold_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetThreshold_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetRefinement_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetRefinement_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetUseST_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetUseST_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetQuadRule_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetQuadRule_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetExtraction_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetExtraction_C",NULL));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetKSPs_C",NULL));
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59 PetscFunctionReturn(PETSC_SUCCESS);
1378 }
1379
1380 static PetscErrorCode EPSView_CISS(EPS eps,PetscViewer viewer)
1381 {
1382 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1383 PetscBool isascii;
1384 PetscViewer sviewer;
1385
1386 PetscFunctionBegin;
1387 PetscCall(PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&isascii));
1388 if (isascii) {
1389 PetscCall(PetscViewerASCIIPrintf(viewer," sizes { integration points: %" PetscInt_FMT ", block size: %" PetscInt_FMT ", moment size: %" PetscInt_FMT ", partitions: %" PetscInt_FMT ", maximum block size: %" PetscInt_FMT " }\n",ctx->N,ctx->L,ctx->M,ctx->npart,ctx->L_max));
1390 if (ctx->isreal) PetscCall(PetscViewerASCIIPrintf(viewer," exploiting symmetry of integration points\n"));
1391 PetscCall(PetscViewerASCIIPrintf(viewer," threshold { delta: %g, spurious threshold: %g }\n",(double)ctx->delta,(double)ctx->spurious_threshold));
1392 PetscCall(PetscViewerASCIIPrintf(viewer," iterative refinement { inner: %" PetscInt_FMT ", blocksize: %" PetscInt_FMT " }\n",ctx->refine_inner, ctx->refine_blocksize));
1393 PetscCall(PetscViewerASCIIPrintf(viewer," extraction: %s\n",EPSCISSExtractions[ctx->extraction]));
1394 PetscCall(PetscViewerASCIIPrintf(viewer," quadrature rule: %s\n",EPSCISSQuadRules[ctx->quad]));
1395 if (ctx->usest) PetscCall(PetscViewerASCIIPrintf(viewer," using ST for linear solves\n"));
1396 else {
1397 if (!ctx->contour || !ctx->contour->ksp) PetscCall(EPSCISSGetKSPs(eps,NULL,NULL));
1398 PetscAssert(ctx->contour && ctx->contour->ksp,PetscObjectComm((PetscObject)eps),PETSC_ERR_PLIB,"Something went wrong with EPSCISSGetKSPs()");
1399 PetscCall(PetscViewerASCIIPushTab(viewer));
1400 if (ctx->npart>1 && ctx->contour->subcomm) {
1401 PetscCall(PetscViewerGetSubViewer(viewer,ctx->contour->subcomm->child,&sviewer));
1402 if (!ctx->contour->subcomm->color) PetscCall(KSPView(ctx->contour->ksp[0],sviewer));
1403 PetscCall(PetscViewerFlush(sviewer));
1404 PetscCall(PetscViewerRestoreSubViewer(viewer,ctx->contour->subcomm->child,&sviewer));
1405 /* extra call needed because of the two calls to PetscViewerASCIIPushSynchronized() in PetscViewerGetSubViewer() */
1406 PetscCall(PetscViewerASCIIPopSynchronized(viewer));
1407 } else PetscCall(KSPView(ctx->contour->ksp[0],viewer));
1408 PetscCall(PetscViewerASCIIPopTab(viewer));
1409 }
1410 }
1411 PetscFunctionReturn(PETSC_SUCCESS);
1412 }
1413
1414 550 static PetscErrorCode EPSSetDefaultST_CISS(EPS eps)
1415 {
1416 550 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1417 550 PetscBool usest = ctx->usest;
1418 550 KSP ksp;
1419 550 PC pc;
1420
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550 PetscFunctionBegin;
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550 if (!((PetscObject)eps->st)->type_name) {
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225 if (!ctx->usest_set) usest = (ctx->npart>1)? PETSC_FALSE: PETSC_TRUE;
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225 if (usest) PetscCall(STSetType(eps->st,STSINVERT));
1425 else {
1426 /* we are not going to use ST, so avoid factorizing the matrix */
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127 PetscCall(STSetType(eps->st,STSHIFT));
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127 if (eps->isgeneralized) {
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30 PetscCall(STGetKSP(eps->st,&ksp));
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30 PetscCall(KSPGetPC(ksp,&pc));
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30 PetscCall(PCSetType(pc,PCNONE));
1432 }
1433 }
1434 }
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118 PetscFunctionReturn(PETSC_SUCCESS);
1436 }
1437
1438 /*MC
1439 EPSCISS - EPSCISS = "ciss" - A contour integral eigensolver based on the
1440 Sakurai-Sugiura scheme.
1441
1442 Notes:
1443 This solver is based on the numerical contour integration idea
1444 proposed initially by {cite:t}`Sak03` and improved later by adding
1445 a Rayleigh-Ritz projection step {cite:p}`Sak07`.
1446
1447 Contour integral methods are able to compute all eigenvalues
1448 lying inside a region of the complex plane. Use `EPSGetRG()` to
1449 specify the region. However, the computational cost is usually high
1450 because multiple linear systems must be solved. For this, we can
1451 use the `KSP` object inside `ST`, or several independent `KSP`s,
1452 see `EPSCISSSetUseST()`.
1453
1454 Details of the implementation in SLEPc can be found in {cite:p}`Mae16`.
1455
1456 Level: beginner
1457
1458 .seealso: [](ch:eps), `EPS`, `EPSType`, `EPSSetType()`, `EPSGetRG()`
1459 M*/
1460 275 SLEPC_EXTERN PetscErrorCode EPSCreate_CISS(EPS eps)
1461 {
1462 275 EPS_CISS *ctx = (EPS_CISS*)eps->data;
1463
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275 PetscFunctionBegin;
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275 PetscCall(PetscNew(&ctx));
1466 275 eps->data = ctx;
1467
1468 275 eps->useds = PETSC_TRUE;
1469 275 eps->categ = EPS_CATEGORY_CONTOUR;
1470
1471 275 eps->ops->solve = EPSSolve_CISS;
1472 275 eps->ops->setup = EPSSetUp_CISS;
1473 275 eps->ops->setupsort = EPSSetUpSort_CISS;
1474 275 eps->ops->setfromoptions = EPSSetFromOptions_CISS;
1475 275 eps->ops->destroy = EPSDestroy_CISS;
1476 275 eps->ops->reset = EPSReset_CISS;
1477 275 eps->ops->view = EPSView_CISS;
1478 275 eps->ops->computevectors = EPSComputeVectors_CISS;
1479 275 eps->ops->setdefaultst = EPSSetDefaultST_CISS;
1480
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetSizes_C",EPSCISSSetSizes_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetSizes_C",EPSCISSGetSizes_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetThreshold_C",EPSCISSSetThreshold_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetThreshold_C",EPSCISSGetThreshold_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetRefinement_C",EPSCISSSetRefinement_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetRefinement_C",EPSCISSGetRefinement_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetUseST_C",EPSCISSSetUseST_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetUseST_C",EPSCISSGetUseST_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetQuadRule_C",EPSCISSSetQuadRule_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetQuadRule_C",EPSCISSGetQuadRule_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSSetExtraction_C",EPSCISSSetExtraction_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetExtraction_C",EPSCISSGetExtraction_CISS));
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275 PetscCall(PetscObjectComposeFunction((PetscObject)eps,"EPSCISSGetKSPs_C",EPSCISSGetKSPs_CISS));
1494
1495 /* set default values of parameters */
1496 275 ctx->N = 32;
1497 275 ctx->L = 16;
1498 275 ctx->M = ctx->N/4;
1499 275 ctx->delta = SLEPC_DEFAULT_TOL*1e-4;
1500 275 ctx->L_max = 64;
1501 275 ctx->spurious_threshold = PetscSqrtReal(SLEPC_DEFAULT_TOL);
1502 275 ctx->usest = PETSC_TRUE;
1503 275 ctx->usest_set = PETSC_FALSE;
1504 275 ctx->isreal = PETSC_FALSE;
1505 275 ctx->refine_inner = 0;
1506 275 ctx->refine_blocksize = 0;
1507 275 ctx->npart = 1;
1508 275 ctx->quad = (EPSCISSQuadRule)0;
1509 275 ctx->extraction = EPS_CISS_EXTRACTION_RITZ;
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275 PetscFunctionReturn(PETSC_SUCCESS);
1511 }
1512