GCC Code Coverage Report


Directory: ./
File: src/pep/impls/krylov/toar/nrefine.c
Date: 2026-07-06 04:10:30
Exec Total Coverage
Lines: 1037 1071 96.8%
Functions: 17 17 100.0%
Branches: 3177 5062 62.8%

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 Newton refinement for polynomial eigenproblems.
12
13 References:
14
15 [1] T. Betcke and D. Kressner, "Perturbation, extraction and refinement
16 of invariant pairs for matrix polynomials", Linear Algebra Appl.
17 435(3):514-536, 2011.
18
19 [2] C. Campos and J.E. Roman, "Parallel iterative refinement in
20 polynomial eigenvalue problems", Numer. Linear Algebra Appl. 23(4):
21 730-745, 2016.
22 */
23
24 #include <slepc/private/pepimpl.h>
25 #include <slepcblaslapack.h>
26
27 typedef struct {
28 Mat *A,M1;
29 BV V,M2,M3,W;
30 PetscInt k,nmat;
31 PetscScalar *fih,*work,*M4;
32 PetscBLASInt *pM4;
33 PetscBool compM1;
34 Vec t;
35 } PEP_REFINE_MATSHELL;
36
37 typedef struct {
38 Mat E[2],M1;
39 Vec tN,ttN,t1,vseq;
40 VecScatter scatterctx;
41 PetscBool compM1;
42 PetscInt *map0,*map1,*idxg,*idxp;
43 PetscSubcomm subc;
44 VecScatter scatter_sub;
45 VecScatter *scatter_id,*scatterp_id;
46 Mat *A;
47 BV V,W,M2,M3,Wt;
48 PetscScalar *M4,*w,*wt,*d,*dt;
49 Vec t,tg,Rv,Vi,tp,tpg;
50 PetscInt idx,*cols;
51 } PEP_REFINE_EXPLICIT;
52
53 15297 static PetscErrorCode MatMult_FS(Mat M ,Vec x,Vec y)
54 {
55 15297 PEP_REFINE_MATSHELL *ctx;
56 15297 PetscInt k,i;
57 15297 PetscScalar *c;
58 15297 PetscBLASInt k_,one=1;
59
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15297 PetscFunctionBegin;
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15297 PetscCall(MatShellGetContext(M,&ctx));
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15297 PetscCall(VecCopy(x,ctx->t));
63 15297 k = ctx->k;
64 15297 c = ctx->work;
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15297 PetscCall(PetscBLASIntCast(k,&k_));
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15297 PetscCall(MatMult(ctx->M1,x,y));
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15297 PetscCall(VecConjugate(ctx->t));
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15297 PetscCall(BVDotVec(ctx->M3,ctx->t,c));
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197757 for (i=0;i<k;i++) c[i] = PetscConj(c[i]);
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15297 PetscCall(PetscFPTrapPush(PETSC_FP_TRAP_OFF));
71
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15297 PetscCallLAPACKInfo("LAPACKgetrs",LAPACKgetrs_("N",&k_,&one,ctx->M4,&k_,ctx->pM4,c,&k_,&info));
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15297 PetscCall(PetscFPTrapPop());
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15297 PetscCall(BVMultVec(ctx->M2,-1.0,1.0,y,c));
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3047 PetscFunctionReturn(PETSC_SUCCESS);
75 }
76
77 /*
78 Evaluates the first d elements of the polynomial basis
79 on a given matrix H which is considered to be triangular
80 */
81 420 static PetscErrorCode PEPEvaluateBasisforMatrix(PEP pep,PetscInt nm,PetscInt k,PetscScalar *H,PetscInt ldh,PetscScalar *fH)
82 {
83 420 PetscInt i,j,ldfh=nm*k,off,nmat=pep->nmat;
84 420 PetscReal *a=pep->pbc,*b=pep->pbc+nmat,*g=pep->pbc+2*nmat,t;
85 420 PetscScalar corr=0.0,alpha,beta;
86 420 PetscBLASInt k_,ldh_,ldfh_;
87
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420 PetscFunctionBegin;
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420 PetscCall(PetscBLASIntCast(ldh,&ldh_));
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420 PetscCall(PetscBLASIntCast(k,&k_));
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420 PetscCall(PetscBLASIntCast(ldfh,&ldfh_));
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420 PetscCall(PetscArrayzero(fH,nm*k*k));
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3675 if (nm>0) for (j=0;j<k;j++) fH[j+j*ldfh] = 1.0;
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420 if (nm>1) {
95 420 t = b[0]/a[0];
96 420 off = k;
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98
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34440 for (i=0;i<k;i++) fH[off+i+j*ldfh] = H[i+j*ldh]/a[0];
99 3255 fH[j+j*ldfh] -= t;
100 }
101 }
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840 for (i=2;i<nm;i++) {
103 420 off = i*k;
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420 if (i==2) {
105
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3675 for (j=0;j<k;j++) {
106 3255 fH[off+j+j*ldfh] = 1.0;
107 3255 H[j+j*ldh] -= b[1];
108 }
109 } else {
110 for (j=0;j<k;j++) {
111 PetscCall(PetscArraycpy(fH+off+j*ldfh,fH+(i-2)*k+j*ldfh,k));
112 H[j+j*ldh] += corr-b[i-1];
113 }
114 }
115 420 corr = b[i-1];
116 420 beta = -g[i-1]/a[i-1];
117 420 alpha = 1/a[i-1];
118
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420 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&alpha,H,&ldh_,fH+(i-1)*k,&ldfh_,&beta,fH+off,&ldfh_));
119 }
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3675 for (j=0;j<k;j++) H[j+j*ldh] += corr;
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84 PetscFunctionReturn(PETSC_SUCCESS);
122 }
123
124 655 static PetscErrorCode NRefSysSetup_shell(PEP pep,PetscInt k,PetscScalar *fH,PetscScalar *S,PetscInt lds,PetscScalar *fh,PetscScalar h,PEP_REFINE_MATSHELL *ctx)
125 {
126 655 PetscScalar *DHii,*T12,*Tr,*Ts,*array,s,ss,sone=1.0,zero=0.0,*M4=ctx->M4,t,*v,*T;
127 655 const PetscScalar *m3,*m2;
128 655 PetscInt i,d,j,nmat=pep->nmat,lda=nmat*k,deg=nmat-1,nloc,ld2,ld3;
129 655 PetscReal *a=pep->pbc,*b=pep->pbc+nmat,*g=pep->pbc+2*nmat;
130 655 PetscBLASInt k_,lda_,lds_,nloc_,ld2_,one=1;
131 655 Mat *A=ctx->A,Mk,M1=ctx->M1,P;
132 655 BV V=ctx->V,M2=ctx->M2,M3=ctx->M3,W=ctx->W;
133 655 MatStructure str;
134 655 Vec vc;
135
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655 PetscFunctionBegin;
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655 PetscCall(STGetMatStructure(pep->st,&str));
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655 PetscCall(PetscMalloc3(nmat*k*k,&T12,k*k,&Tr,PetscMax(k*k,nmat),&Ts));
139 655 DHii = T12;
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655 PetscCall(PetscArrayzero(DHii,k*k*nmat));
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8640 for (i=0;i<k;i++) DHii[k+i+i*lda] = 1.0/a[0];
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1310 for (d=2;d<nmat;d++) {
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111000 for (i=0;i<k;i++) {
145 103015 DHii[d*k+i+j*lda] = ((h-b[d-1])*DHii[(d-1)*k+i+j*lda]+fH[(d-1)*k+i+j*lda]-g[d-1]*DHii[(d-2)*k+i+j*lda])/(a[d-1]);
146 }
147 }
148 }
149 /* T11 */
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655 if (!ctx->compM1) {
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595 PetscCall(MatCopy(A[0],M1,DIFFERENT_NONZERO_PATTERN));
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595 PetscCall(PEPEvaluateBasis(pep,h,0,Ts,NULL));
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1785 for (j=1;j<nmat;j++) PetscCall(MatAXPY(M1,Ts[j],A[j],str));
154 }
155
156 /* T22 */
157
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655 PetscCall(PetscBLASIntCast(lds,&lds_));
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655 PetscCall(PetscBLASIntCast(k,&k_));
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655 PetscCall(PetscBLASIntCast(lda,&lda_));
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655 PetscCallBLAS("BLASgemm",BLASgemm_("C","N",&k_,&k_,&k_,&sone,S,&lds_,S,&lds_,&zero,Tr,&k_));
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1310 for (i=1;i<deg;i++) {
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655 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&sone,Tr,&k_,DHii+i*k,&lda_,&zero,Ts,&k_));
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655 s = (i==1)?0.0:1.0;
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655 PetscCallBLAS("BLASgemm",BLASgemm_("C","N",&k_,&k_,&k_,&sone,fH+i*k,&lda_,Ts,&k_,&s,M4,&k_));
165 }
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56155 for (i=0;i<k;i++) for (j=0;j<i;j++) { t=M4[i+j*k];M4[i+j*k]=M4[j+i*k];M4[j+i*k]=t; }
167
168 /* T12 */
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655 PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,k,k,NULL,&Mk));
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1965 for (i=1;i<nmat;i++) {
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1310 PetscCall(MatDenseGetArrayWrite(Mk,&array));
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1310 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&sone,S,&lds_,DHii+i*k,&lda_,&zero,array,&k_));
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1310 PetscCall(MatDenseRestoreArrayWrite(Mk,&array));
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1310 PetscCall(BVSetActiveColumns(W,0,k));
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1310 PetscCall(BVMult(W,1.0,0.0,V,Mk));
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1310 if (i==1) PetscCall(BVMatMult(W,A[i],M2));
177 else {
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655 PetscCall(BVMatMult(W,A[i],M3)); /* using M3 as work space */
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1310 PetscCall(BVMult(M2,1.0,1.0,M3,NULL));
180 }
181 }
182
183 /* T21 */
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655 PetscCall(MatDenseGetArrayWrite(Mk,&array));
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1310 for (i=1;i<deg;i++) {
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655 s = (i==1)?0.0:1.0;
187 655 ss = PetscConj(fh[i]);
188
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655 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&ss,S,&lds_,fH+i*k,&lda_,&s,array,&k_));
189 }
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655 PetscCall(MatDenseRestoreArrayWrite(Mk,&array));
191
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655 PetscCall(BVSetActiveColumns(M3,0,k));
192
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655 PetscCall(BVMult(M3,1.0,0.0,V,Mk));
193
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8640 for (i=0;i<k;i++) {
194
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7985 PetscCall(BVGetColumn(M3,i,&vc));
195
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7985 PetscCall(VecConjugate(vc));
196
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7985 PetscCall(BVRestoreColumn(M3,i,&vc));
197 }
198
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655 PetscCall(MatDestroy(&Mk));
199
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655 PetscCall(PetscFree3(T12,Tr,Ts));
200
201
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655 PetscCall(VecGetLocalSize(ctx->t,&nloc));
202
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655 PetscCall(PetscBLASIntCast(nloc,&nloc_));
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655 PetscCall(PetscMalloc1(nloc*k,&T));
204
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655 PetscCall(KSPGetOperators(pep->refineksp,NULL,&P));
205
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655 if (!ctx->compM1) PetscCall(MatCopy(ctx->M1,P,SAME_NONZERO_PATTERN));
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655 PetscCall(BVGetArrayRead(ctx->M2,&m2));
207
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655 PetscCall(BVGetLeadingDimension(ctx->M2,&ld2));
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655 PetscCall(PetscBLASIntCast(ld2,&ld2_));
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655 PetscCall(BVGetArrayRead(ctx->M3,&m3));
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655 PetscCall(BVGetLeadingDimension(ctx->M3,&ld3));
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655 PetscCall(VecGetArray(ctx->t,&v));
212
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259855 for (i=0;i<nloc;i++) for (j=0;j<k;j++) T[j+i*k] = m3[i+j*ld3];
213
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655 PetscCall(PetscFPTrapPush(PETSC_FP_TRAP_OFF));
214
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655 PetscCallLAPACKInfo("LAPACKgesv",LAPACKgesv_(&k_,&nloc_,ctx->M4,&k_,ctx->pM4,T,&k_,&info));
215
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655 PetscCall(PetscFPTrapPop());
216
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20305 for (i=0;i<nloc;i++) v[i] = BLASdot_(&k_,m2+i,&ld2_,T+i*k,&one);
217
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655 PetscCall(VecRestoreArray(ctx->t,&v));
218
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655 PetscCall(BVRestoreArrayRead(ctx->M2,&m2));
219
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655 PetscCall(BVRestoreArrayRead(ctx->M3,&m3));
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655 PetscCall(MatDiagonalSet(P,ctx->t,ADD_VALUES));
221
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655 PetscCall(PetscFree(T));
222
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655 PetscCall(KSPSetUp(pep->refineksp));
223
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131 PetscFunctionReturn(PETSC_SUCCESS);
224 }
225
226 655 static PetscErrorCode NRefSysSolve_shell(KSP ksp,PetscInt nmat,Vec Rv,PetscScalar *Rh,PetscInt k,Vec dVi,PetscScalar *dHi)
227 {
228 655 PetscScalar *t0;
229 655 PetscBLASInt k_,one=1,lda_;
230 655 PetscInt i,lda=nmat*k;
231 655 Mat M;
232 655 PEP_REFINE_MATSHELL *ctx;
233
234
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655 PetscFunctionBegin;
235
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655 PetscCall(KSPGetOperators(ksp,&M,NULL));
236
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655 PetscCall(MatShellGetContext(M,&ctx));
237
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655 PetscCall(PetscCalloc1(k,&t0));
238
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655 PetscCall(PetscFPTrapPush(PETSC_FP_TRAP_OFF));
239
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655 PetscCall(PetscBLASIntCast(lda,&lda_));
240
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655 PetscCall(PetscBLASIntCast(k,&k_));
241
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8640 for (i=0;i<k;i++) t0[i] = Rh[i];
242
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655 PetscCallLAPACKInfo("LAPACKgetrs",LAPACKgetrs_("N",&k_,&one,ctx->M4,&k_,ctx->pM4,t0,&k_,&info));
243
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655 PetscCall(BVMultVec(ctx->M2,-1.0,1.0,Rv,t0));
244
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655 PetscCall(KSPSolve(ksp,Rv,dVi));
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655 PetscCall(VecConjugate(dVi));
246
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655 PetscCall(BVDotVec(ctx->M3,dVi,dHi));
247
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655 PetscCall(VecConjugate(dVi));
248
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8640 for (i=0;i<k;i++) dHi[i] = Rh[i]-PetscConj(dHi[i]);
249
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655 PetscCallLAPACKInfo("LAPACKgetrs",LAPACKgetrs_("N",&k_,&one,ctx->M4,&k_,ctx->pM4,dHi,&k_,&info));
250
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655 PetscCall(PetscFPTrapPop());
251
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655 PetscCall(PetscFree(t0));
252
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131 PetscFunctionReturn(PETSC_SUCCESS);
253 }
254
255 /*
256 Computes the residual P(H,V*S)*e_j for the polynomial
257 */
258 1085 static PetscErrorCode NRefRightSide(PetscInt nmat,PetscReal *pcf,Mat *A,PetscInt k,BV V,PetscScalar *S,PetscInt lds,PetscInt j,PetscScalar *H,PetscInt ldh,PetscScalar *fH,PetscScalar *DfH,PetscScalar *dH,BV dV,PetscScalar *dVS,PetscInt rds,Vec Rv,PetscScalar *Rh,BV W,Vec t)
259 {
260 1085 PetscScalar *DS0,*DS1,*F,beta=0.0,sone=1.0,none=-1.0,tt=0.0,*h,zero=0.0,*Z,*c0;
261 1085 PetscReal *a=pcf,*b=pcf+nmat,*g=b+nmat;
262 1085 PetscInt i,ii,jj,lda;
263 1085 PetscBLASInt lda_,k_,ldh_,lds_,nmat_,k2_,krds_,j_,one=1;
264 1085 Mat M0;
265 1085 Vec w;
266
267
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1085 PetscFunctionBegin;
268
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1085 PetscCall(PetscMalloc4(k*nmat,&h,k*k,&DS0,k*k,&DS1,k*k,&Z));
269 1085 lda = k*nmat;
270
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1085 PetscCall(PetscBLASIntCast(k,&k_));
271
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1085 PetscCall(PetscBLASIntCast(lds,&lds_));
272
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1085 PetscCall(PetscBLASIntCast(lda,&lda_));
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1085 PetscCall(PetscBLASIntCast(nmat,&nmat_));
274
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1085 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&nmat_,&k_,&sone,S,&lds_,fH+j*lda,&k_,&zero,h,&k_));
275
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1085 PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,k,nmat,h,&M0));
276
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1085 PetscCall(BVSetActiveColumns(W,0,nmat));
277
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1085 PetscCall(BVMult(W,1.0,0.0,V,M0));
278
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1085 PetscCall(MatDestroy(&M0));
279
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1085 PetscCall(BVGetColumn(W,0,&w));
281
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1085 PetscCall(MatMult(A[0],w,Rv));
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1085 PetscCall(BVRestoreColumn(W,0,&w));
283
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3255 for (i=1;i<nmat;i++) {
284
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2170 PetscCall(BVGetColumn(W,i,&w));
285
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2170 PetscCall(MatMult(A[i],w,t));
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2170 PetscCall(BVRestoreColumn(W,i,&w));
287
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2170 PetscCall(VecAXPY(Rv,1.0,t));
288 }
289 /* Update right-hand side */
290
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1085 if (j) {
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945 PetscCall(PetscBLASIntCast(ldh,&ldh_));
292
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945 PetscCall(PetscArrayzero(Z,k*k));
293
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945 PetscCall(PetscArrayzero(DS0,k*k));
294
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945 PetscCall(PetscArraycpy(Z+(j-1)*k,dH+(j-1)*k,k));
295 /* Update DfH */
296
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2835 for (i=1;i<nmat;i++) {
297
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1890 if (i>1) {
298 945 beta = -g[i-1];
299
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945 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&sone,fH+(i-1)*k,&lda_,Z,&k_,&beta,DS0,&k_));
300 945 tt += -b[i-1];
301
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10255 for (ii=0;ii<k;ii++) H[ii+ii*ldh] += tt;
302 945 tt = b[i-1];
303 945 beta = 1.0/a[i-1];
304
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945 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&beta,DS1,&k_,H,&ldh_,&beta,DS0,&k_));
305 945 F = DS0; DS0 = DS1; DS1 = F;
306 } else {
307
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945 PetscCall(PetscArrayzero(DS1,k*k));
308
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10255 for (ii=0;ii<k;ii++) DS1[ii+(j-1)*k] = Z[ii+(j-1)*k]/a[0];
309 }
310
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11200 for (jj=j;jj<k;jj++) {
311
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115920 for (ii=0;ii<k;ii++) DfH[k*i+ii+jj*lda] += DS1[ii+jj*k];
312 }
313 }
314
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10255 for (ii=0;ii<k;ii++) H[ii+ii*ldh] += tt;
315 /* Update right-hand side */
316
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945 PetscCall(PetscBLASIntCast(2*k,&k2_));
317
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945 PetscCall(PetscBLASIntCast(j,&j_));
318
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945 PetscCall(PetscBLASIntCast(k+rds,&krds_));
319 945 c0 = DS0;
320
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945 PetscCall(PetscArrayzero(Rh,k));
321
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3780 for (i=0;i<nmat;i++) {
322
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2835 PetscCallBLAS("BLASgemv",BLASgemv_("N",&krds_,&j_,&sone,dVS,&k2_,fH+j*lda+i*k,&one,&zero,h,&one));
323
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2835 PetscCallBLAS("BLASgemv",BLASgemv_("N",&k_,&k_,&sone,S,&lds_,DfH+i*k+j*lda,&one,&sone,h,&one));
324
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2835 PetscCall(BVMultVec(V,1.0,0.0,t,h));
325
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2835 PetscCall(BVSetActiveColumns(dV,0,rds));
326
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2835 PetscCall(BVMultVec(dV,1.0,1.0,t,h+k));
327
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2835 PetscCall(BVGetColumn(W,i,&w));
328
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2835 PetscCall(MatMult(A[i],t,w));
329
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2835 PetscCall(BVRestoreColumn(W,i,&w));
330
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2835 if (i>0 && i<nmat-1) {
331
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945 PetscCallBLAS("BLASgemv",BLASgemv_("C",&k_,&k_,&sone,S,&lds_,h,&one,&zero,c0,&one));
332
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2835 PetscCallBLAS("BLASgemv",BLASgemv_("C",&k_,&k_,&none,fH+i*k,&lda_,c0,&one,&sone,Rh,&one));
333 }
334 }
335
336
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3780 for (i=0;i<nmat;i++) h[i] = -1.0;
337
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945 PetscCall(BVMultVec(W,1.0,1.0,Rv,h));
338 }
339
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1085 PetscCall(PetscFree4(h,DS0,DS1,Z));
340
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217 PetscFunctionReturn(PETSC_SUCCESS);
341 }
342
343 2055 static PetscErrorCode NRefSysSolve_mbe(PetscInt k,PetscInt sz,BV W,PetscScalar *w,BV Wt,PetscScalar *wt,PetscScalar *d,PetscScalar *dt,KSP ksp,BV T2,BV T3 ,PetscScalar *T4,PetscBool trans,Vec x1,PetscScalar *x2,Vec sol1,PetscScalar *sol2,Vec vw)
344 {
345 2055 PetscInt i,j,incf,incc;
346 2055 PetscScalar *y,*g,*xx2,*ww,y2,*dd;
347 2055 Vec v,t,xx1;
348 2055 BV WW,T;
349
350
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2055 PetscFunctionBegin;
351
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2055 PetscCall(PetscMalloc3(sz,&y,sz,&g,k,&xx2));
352
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2055 if (trans) {
353 WW = W; ww = w; dd = d; T = T3; incf = 0; incc = 1;
354 } else {
355 1110 WW = Wt; ww = wt; dd = dt; T = T2; incf = 1; incc = 0;
356 }
357 2055 xx1 = vw;
358
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2055 PetscCall(VecCopy(x1,xx1));
359
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2055 PetscCall(PetscArraycpy(xx2,x2,sz));
360
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2055 PetscCall(PetscArrayzero(sol2,k));
361
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7650 for (i=sz-1;i>=0;i--) {
362
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5595 PetscCall(BVGetColumn(WW,i,&v));
363
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5595 PetscCall(VecConjugate(v));
364
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5595 PetscCall(VecDot(xx1,v,y+i));
365
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5595 PetscCall(VecConjugate(v));
366
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5595 PetscCall(BVRestoreColumn(WW,i,&v));
367
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14290 for (j=0;j<i;j++) y[i] += ww[j+i*k]*xx2[j];
368 5595 y[i] = -(y[i]-xx2[i])/dd[i];
369
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5595 PetscCall(BVGetColumn(T,i,&t));
370
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5595 PetscCall(VecAXPY(xx1,-y[i],t));
371
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5595 PetscCall(BVRestoreColumn(T,i,&t));
372
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19885 for (j=0;j<=i;j++) xx2[j] -= y[i]*T4[j*incf+incc*i+(i*incf+incc*j)*k];
373 5595 g[i] = xx2[i];
374 }
375
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2055 if (trans) PetscCall(KSPSolveTranspose(ksp,xx1,sol1));
376
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1110 else PetscCall(KSPSolve(ksp,xx1,sol1));
377
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2055 if (trans) {
378 WW = Wt; ww = wt; dd = dt; T = T2; incf = 1; incc = 0;
379 } else {
380 1110 WW = W; ww = w; dd = d; T = T3; incf = 0; incc = 1;
381 }
382
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7650 for (i=0;i<sz;i++) {
383
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5595 PetscCall(BVGetColumn(T,i,&t));
384
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5595 PetscCall(VecConjugate(t));
385
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5595 PetscCall(VecDot(sol1,t,&y2));
386
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5595 PetscCall(VecConjugate(t));
387
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5595 PetscCall(BVRestoreColumn(T,i,&t));
388
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14290 for (j=0;j<i;j++) y2 += sol2[j]*T4[j*incf+incc*i+(i*incf+incc*j)*k];
389 5595 y2 = (g[i]-y2)/dd[i];
390
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5595 PetscCall(BVGetColumn(WW,i,&v));
391
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5595 PetscCall(VecAXPY(sol1,-y2,v));
392
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14290 for (j=0;j<i;j++) sol2[j] -= ww[j+i*k]*y2;
393 5595 sol2[i] = y[i]+y2;
394
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5595 PetscCall(BVRestoreColumn(WW,i,&v));
395 }
396
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2055 PetscCall(PetscFree3(y,g,xx2));
397
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411 PetscFunctionReturn(PETSC_SUCCESS);
398 }
399
400 165 static PetscErrorCode NRefSysSetup_mbe(PEP pep,PetscInt k,KSP ksp,PetscScalar *fH,PetscScalar *S,PetscInt lds,PetscScalar *fh,PetscScalar h,BV V,PEP_REFINE_EXPLICIT *matctx)
401 {
402 165 PetscInt i,j,l,nmat=pep->nmat,lda=nmat*k,deg=nmat-1;
403 165 Mat M1=matctx->M1,*A,*At,Mk;
404 165 PetscReal *a=pep->pbc,*b=pep->pbc+nmat,*g=pep->pbc+2*nmat;
405 165 PetscScalar s,ss,*DHii,*T12,*array,*Ts,*Tr,*M4=matctx->M4,sone=1.0,zero=0.0;
406 165 PetscScalar *w=matctx->w,*wt=matctx->wt,*d=matctx->d,*dt=matctx->dt;
407 165 PetscBLASInt lds_,lda_,k_;
408 165 MatStructure str;
409 165 PetscBool flg;
410 165 BV M2=matctx->M2,M3=matctx->M3,W=matctx->W,Wt=matctx->Wt;
411 165 Vec vc,vc2;
412
413
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165 PetscFunctionBegin;
414
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165 PetscCall(PetscMalloc3(nmat*k*k,&T12,k*k,&Tr,PetscMax(k*k,nmat),&Ts));
415
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165 PetscCall(STGetMatStructure(pep->st,&str));
416
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165 PetscCall(STGetTransform(pep->st,&flg));
417
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165 if (flg) {
418
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65 PetscCall(PetscMalloc1(pep->nmat,&At));
419
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260 for (i=0;i<pep->nmat;i++) PetscCall(STGetMatrixTransformed(pep->st,i,&At[i]));
420 100 } else At = pep->A;
421
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165 if (matctx->subc) A = matctx->A;
422 115 else A = At;
423 /* Form the explicit system matrix */
424 165 DHii = T12;
425
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165 PetscCall(PetscArrayzero(DHii,k*k*nmat));
426
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1110 for (i=0;i<k;i++) DHii[k+i+i*lda] = 1.0/a[0];
427
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330 for (l=2;l<nmat;l++) {
428
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1110 for (j=0;j<k;j++) {
429
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6540 for (i=0;i<k;i++) {
430 5595 DHii[l*k+i+j*lda] = ((h-b[l-1])*DHii[(l-1)*k+i+j*lda]+fH[(l-1)*k+i+j*lda]-g[l-1]*DHii[(l-2)*k+i+j*lda])/a[l-1];
431 }
432 }
433 }
434
435 /* T11 */
436
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165 if (!matctx->compM1) {
437
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125 PetscCall(MatCopy(A[0],M1,DIFFERENT_NONZERO_PATTERN));
438
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125 PetscCall(PEPEvaluateBasis(pep,h,0,Ts,NULL));
439
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375 for (j=1;j<nmat;j++) PetscCall(MatAXPY(M1,Ts[j],A[j],str));
440 }
441
442 /* T22 */
443
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165 PetscCall(PetscBLASIntCast(lds,&lds_));
444
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165 PetscCall(PetscBLASIntCast(k,&k_));
445
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165 PetscCall(PetscBLASIntCast(lda,&lda_));
446
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165 PetscCallBLAS("BLASgemm",BLASgemm_("C","N",&k_,&k_,&k_,&sone,S,&lds_,S,&lds_,&zero,Tr,&k_));
447
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330 for (i=1;i<deg;i++) {
448
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165 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&sone,Tr,&k_,DHii+i*k,&lda_,&zero,Ts,&k_));
449
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165 s = (i==1)?0.0:1.0;
450
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165 PetscCallBLAS("BLASgemm",BLASgemm_("C","N",&k_,&k_,&k_,&sone,fH+i*k,&lda_,Ts,&k_,&s,M4,&k_));
451 }
452
453 /* T12 */
454
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165 PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,k,k,NULL,&Mk));
455
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495 for (i=1;i<nmat;i++) {
456
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330 PetscCall(MatDenseGetArrayWrite(Mk,&array));
457
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330 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&sone,S,&lds_,DHii+i*k,&lda_,&zero,array,&k_));
458
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330 PetscCall(MatDenseRestoreArrayWrite(Mk,&array));
459
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330 PetscCall(BVSetActiveColumns(W,0,k));
460
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330 PetscCall(BVMult(W,1.0,0.0,V,Mk));
461
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330 if (i==1) PetscCall(BVMatMult(W,A[i],M2));
462 else {
463
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165 PetscCall(BVMatMult(W,A[i],M3)); /* using M3 as work space */
464
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330 PetscCall(BVMult(M2,1.0,1.0,M3,NULL));
465 }
466 }
467
468 /* T21 */
469
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165 PetscCall(MatDenseGetArrayWrite(Mk,&array));
470
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330 for (i=1;i<deg;i++) {
471
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165 s = (i==1)?0.0:1.0;
472 165 ss = PetscConj(fh[i]);
473
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165 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&ss,S,&lds_,fH+i*k,&lda_,&s,array,&k_));
474 }
475
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165 PetscCall(MatDenseRestoreArrayWrite(Mk,&array));
476
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165 PetscCall(BVSetActiveColumns(M3,0,k));
477
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165 PetscCall(BVMult(M3,1.0,0.0,V,Mk));
478
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1110 for (i=0;i<k;i++) {
479
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945 PetscCall(BVGetColumn(M3,i,&vc));
480
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945 PetscCall(VecConjugate(vc));
481
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945 PetscCall(BVRestoreColumn(M3,i,&vc));
482 }
483
484
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165 PetscCall(PEP_KSPSetOperators(ksp,M1,M1));
485
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165 PetscCall(KSPSetUp(ksp));
486
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165 PetscCall(MatDestroy(&Mk));
487
488 /* Set up for BEMW */
489
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1110 for (i=0;i<k;i++) {
490
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945 PetscCall(BVGetColumn(M2,i,&vc));
491
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945 PetscCall(BVGetColumn(W,i,&vc2));
492
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945 PetscCall(NRefSysSolve_mbe(k,i,W,w,Wt,wt,d,dt,ksp,M2,M3,M4,PETSC_FALSE,vc,M4+i*k,vc2,w+i*k,matctx->t));
493
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945 PetscCall(BVRestoreColumn(M2,i,&vc));
494
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945 PetscCall(BVGetColumn(M3,i,&vc));
495
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945 PetscCall(VecConjugate(vc));
496
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945 PetscCall(VecDot(vc2,vc,&d[i]));
497
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945 PetscCall(VecConjugate(vc));
498
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945 PetscCall(BVRestoreColumn(M3,i,&vc));
499
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3270 for (j=0;j<i;j++) d[i] += M4[i+j*k]*w[j+i*k];
500 945 d[i] = M4[i+i*k]-d[i];
501
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945 PetscCall(BVRestoreColumn(W,i,&vc2));
502
503
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945 PetscCall(BVGetColumn(M3,i,&vc));
504
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945 PetscCall(BVGetColumn(Wt,i,&vc2));
505
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4215 for (j=0;j<=i;j++) Ts[j] = M4[i+j*k];
506
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945 PetscCall(NRefSysSolve_mbe(k,i,W,w,Wt,wt,d,dt,ksp,M2,M3,M4,PETSC_TRUE,vc,Ts,vc2,wt+i*k,matctx->t));
507
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945 PetscCall(BVRestoreColumn(M3,i,&vc));
508
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945 PetscCall(BVGetColumn(M2,i,&vc));
509
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945 PetscCall(VecConjugate(vc2));
510
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945 PetscCall(VecDot(vc,vc2,&dt[i]));
511
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945 PetscCall(VecConjugate(vc2));
512
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945 PetscCall(BVRestoreColumn(M2,i,&vc));
513
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3270 for (j=0;j<i;j++) dt[i] += M4[j+i*k]*wt[j+i*k];
514 945 dt[i] = M4[i+i*k]-dt[i];
515
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945 PetscCall(BVRestoreColumn(Wt,i,&vc2));
516 }
517
518
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165 if (flg) PetscCall(PetscFree(At));
519
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165 PetscCall(PetscFree3(T12,Tr,Ts));
520
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33 PetscFunctionReturn(PETSC_SUCCESS);
521 }
522
523 165 static PetscErrorCode NRefSysSetup_explicit(PEP pep,PetscInt k,KSP ksp,PetscScalar *fH,PetscScalar *S,PetscInt lds,PetscScalar *fh,PetscScalar h,BV V,PEP_REFINE_EXPLICIT *matctx,BV W)
524 {
525 165 PetscInt i,j,d,n,n0,m0,n1,m1,nmat=pep->nmat,lda=nmat*k,deg=nmat-1;
526 165 PetscInt *idxg=matctx->idxg,*idxp=matctx->idxp,idx,ncols;
527 165 Mat M,*E=matctx->E,*A,*At,Mk,Md;
528 165 PetscReal *a=pep->pbc,*b=pep->pbc+nmat,*g=pep->pbc+2*nmat;
529 165 PetscScalar s,ss,*DHii,*T22,*T21,*T12,*Ts,*Tr,*array,*ts,sone=1.0,zero=0.0;
530 165 PetscBLASInt lds_,lda_,k_;
531 165 const PetscInt *idxmc;
532 165 const PetscScalar *valsc,*carray;
533 165 MatStructure str;
534 165 Vec vc,vc0;
535 165 PetscBool flg;
536
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165 PetscFunctionBegin;
538
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165 PetscCall(PetscMalloc5(k*k,&T22,k*k,&T21,nmat*k*k,&T12,k*k,&Tr,k*k,&Ts));
539
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165 PetscCall(STGetMatStructure(pep->st,&str));
540
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165 PetscCall(KSPGetOperators(ksp,&M,NULL));
541
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165 PetscCall(MatGetOwnershipRange(E[1],&n1,&m1));
542
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165 PetscCall(MatGetOwnershipRange(E[0],&n0,&m0));
543
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165 PetscCall(MatGetOwnershipRange(M,&n,NULL));
544
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165 PetscCall(PetscMalloc1(nmat,&ts));
545
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165 PetscCall(STGetTransform(pep->st,&flg));
546
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165 if (flg) {
547
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65 PetscCall(PetscMalloc1(pep->nmat,&At));
548
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260 for (i=0;i<pep->nmat;i++) PetscCall(STGetMatrixTransformed(pep->st,i,&At[i]));
549 100 } else At = pep->A;
550
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165 if (matctx->subc) A = matctx->A;
551 115 else A = At;
552 /* Form the explicit system matrix */
553 165 DHii = T12;
554
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165 PetscCall(PetscArrayzero(DHii,k*k*nmat));
555
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1110 for (i=0;i<k;i++) DHii[k+i+i*lda] = 1.0/a[0];
556
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330 for (d=2;d<nmat;d++) {
557
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1110 for (j=0;j<k;j++) {
558
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6540 for (i=0;i<k;i++) {
559 5595 DHii[d*k+i+j*lda] = ((h-b[d-1])*DHii[(d-1)*k+i+j*lda]+fH[(d-1)*k+i+j*lda]-g[d-1]*DHii[(d-2)*k+i+j*lda])/a[d-1];
560 }
561 }
562 }
563
564 /* T11 */
565
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165 if (!matctx->compM1) {
566
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125 PetscCall(MatCopy(A[0],E[0],DIFFERENT_NONZERO_PATTERN));
567
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125 PetscCall(PEPEvaluateBasis(pep,h,0,Ts,NULL));
568
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375 for (j=1;j<nmat;j++) PetscCall(MatAXPY(E[0],Ts[j],A[j],str));
569 }
570
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5115 for (i=n0;i<m0;i++) {
571
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4950 PetscCall(MatGetRow(E[0],i,&ncols,&idxmc,&valsc));
572 4950 idx = n+i-n0;
573
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19470 for (j=0;j<ncols;j++) {
574 14520 idxg[j] = matctx->map0[idxmc[j]];
575 }
576
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4950 PetscCall(MatSetValues(M,1,&idx,ncols,idxg,valsc,INSERT_VALUES));
577
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4950 PetscCall(MatRestoreRow(E[0],i,&ncols,&idxmc,&valsc));
578 }
579
580 /* T22 */
581
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165 PetscCall(PetscBLASIntCast(lds,&lds_));
582
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165 PetscCall(PetscBLASIntCast(k,&k_));
583
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165 PetscCall(PetscBLASIntCast(lda,&lda_));
584
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165 PetscCallBLAS("BLASgemm",BLASgemm_("C","N",&k_,&k_,&k_,&sone,S,&lds_,S,&lds_,&zero,Tr,&k_));
585
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330 for (i=1;i<deg;i++) {
586
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165 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&sone,Tr,&k_,DHii+i*k,&lda_,&zero,Ts,&k_));
587
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165 s = (i==1)?0.0:1.0;
588
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165 PetscCallBLAS("BLASgemm",BLASgemm_("C","N",&k_,&k_,&k_,&sone,fH+i*k,&lda_,Ts,&k_,&s,T22,&k_));
589 }
590
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1110 for (j=0;j<k;j++) idxp[j] = matctx->map1[j];
591
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1110 for (i=0;i<m1-n1;i++) {
592 945 idx = n+m0-n0+i;
593
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6540 for (j=0;j<k;j++) {
594 5595 Tr[j] = T22[n1+i+j*k];
595 }
596
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945 PetscCall(MatSetValues(M,1,&idx,k,idxp,Tr,INSERT_VALUES));
597 }
598
599 /* T21 */
600
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330 for (i=1;i<deg;i++) {
601
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165 s = (i==1)?0.0:1.0;
602 165 ss = PetscConj(fh[i]);
603
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165 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&ss,S,&lds_,fH+i*k,&lda_,&s,T21,&k_));
604 }
605
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165 PetscCall(BVSetActiveColumns(W,0,k));
606
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165 PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,k,k,T21,&Mk));
607
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165 PetscCall(BVMult(W,1.0,0.0,V,Mk));
608
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1110 for (i=0;i<k;i++) {
609
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945 PetscCall(BVGetColumn(W,i,&vc));
610
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945 PetscCall(VecConjugate(vc));
611
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945 PetscCall(VecGetArrayRead(vc,&carray));
612 945 idx = matctx->map1[i];
613
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945 PetscCall(MatSetValues(M,1,&idx,m0-n0,matctx->map0+n0,carray,INSERT_VALUES));
614
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945 PetscCall(VecRestoreArrayRead(vc,&carray));
615
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945 PetscCall(BVRestoreColumn(W,i,&vc));
616 }
617
618 /* T12 */
619
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495 for (i=1;i<nmat;i++) {
620
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330 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&sone,S,&lds_,DHii+i*k,&lda_,&zero,Ts,&k_));
621
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2220 for (j=0;j<k;j++) PetscCall(PetscArraycpy(T12+i*k+j*lda,Ts+j*k,k));
622 }
623
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165 PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,k,nmat-1,NULL,&Md));
624
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660 for (i=0;i<nmat;i++) ts[i] = 1.0;
625
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1110 for (j=0;j<k;j++) {
626
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945 PetscCall(MatDenseGetArrayWrite(Md,&array));
627
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945 PetscCall(PetscArraycpy(array,T12+k+j*lda,(nmat-1)*k));
628
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945 PetscCall(MatDenseRestoreArrayWrite(Md,&array));
629
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945 PetscCall(BVSetActiveColumns(W,0,nmat-1));
630
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945 PetscCall(BVMult(W,1.0,0.0,V,Md));
631
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2835 for (i=nmat-1;i>0;i--) {
632
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1890 PetscCall(BVGetColumn(W,i-1,&vc0));
633
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1890 PetscCall(BVGetColumn(W,i,&vc));
634
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1890 PetscCall(MatMult(A[i],vc0,vc));
635
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1890 PetscCall(BVRestoreColumn(W,i-1,&vc0));
636
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1890 PetscCall(BVRestoreColumn(W,i,&vc));
637 }
638
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945 PetscCall(BVSetActiveColumns(W,1,nmat));
639
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945 PetscCall(BVGetColumn(W,0,&vc0));
640
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945 PetscCall(BVMultVec(W,1.0,0.0,vc0,ts));
641
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945 PetscCall(VecGetArrayRead(vc0,&carray));
642 945 idx = matctx->map1[j];
643
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945 PetscCall(MatSetValues(M,m0-n0,matctx->map0+n0,1,&idx,carray,INSERT_VALUES));
644
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945 PetscCall(VecRestoreArrayRead(vc0,&carray));
645
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945 PetscCall(BVRestoreColumn(W,0,&vc0));
646 }
647
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165 PetscCall(MatAssemblyBegin(M,MAT_FINAL_ASSEMBLY));
648
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165 PetscCall(MatAssemblyEnd(M,MAT_FINAL_ASSEMBLY));
649
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165 PetscCall(PEP_KSPSetOperators(ksp,M,M));
650
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165 PetscCall(KSPSetUp(ksp));
651
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165 PetscCall(PetscFree(ts));
652
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165 PetscCall(MatDestroy(&Mk));
653
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165 PetscCall(MatDestroy(&Md));
654
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165 if (flg) PetscCall(PetscFree(At));
655
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165 PetscCall(PetscFree5(T22,T21,T12,Tr,Ts));
656
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33 PetscFunctionReturn(PETSC_SUCCESS);
657 }
658
659 165 static PetscErrorCode NRefSysSolve_explicit(PetscInt k,KSP ksp,Vec Rv,PetscScalar *Rh,Vec dVi,PetscScalar *dHi,PEP_REFINE_EXPLICIT *matctx)
660 {
661 165 PetscInt n0,m0,n1,m1,i;
662 165 PetscScalar *arrayV;
663 165 const PetscScalar *array;
664
665
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165 PetscFunctionBegin;
666
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165 PetscCall(MatGetOwnershipRange(matctx->E[1],&n1,&m1));
667
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165 PetscCall(MatGetOwnershipRange(matctx->E[0],&n0,&m0));
668
669 /* Right side */
670
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165 PetscCall(VecGetArrayRead(Rv,&array));
671
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165 PetscCall(VecSetValues(matctx->tN,m0-n0,matctx->map0+n0,array,INSERT_VALUES));
672
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165 PetscCall(VecRestoreArrayRead(Rv,&array));
673
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165 PetscCall(VecSetValues(matctx->tN,m1-n1,matctx->map1+n1,Rh+n1,INSERT_VALUES));
674
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165 PetscCall(VecAssemblyBegin(matctx->tN));
675
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165 PetscCall(VecAssemblyEnd(matctx->tN));
676
677 /* Solve */
678
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165 PetscCall(KSPSolve(ksp,matctx->tN,matctx->ttN));
679
680 /* Retrieve solution */
681
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165 PetscCall(VecGetArray(dVi,&arrayV));
682
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165 PetscCall(VecGetArrayRead(matctx->ttN,&array));
683
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165 PetscCall(PetscArraycpy(arrayV,array,m0-n0));
684
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165 PetscCall(VecRestoreArray(dVi,&arrayV));
685
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165 if (!matctx->subc) {
686
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115 PetscCall(VecGetArray(matctx->t1,&arrayV));
687
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800 for (i=0;i<m1-n1;i++) arrayV[i] = array[m0-n0+i];
688
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115 PetscCall(VecRestoreArray(matctx->t1,&arrayV));
689
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115 PetscCall(VecRestoreArrayRead(matctx->ttN,&array));
690
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115 PetscCall(VecScatterBegin(matctx->scatterctx,matctx->t1,matctx->vseq,INSERT_VALUES,SCATTER_FORWARD));
691
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115 PetscCall(VecScatterEnd(matctx->scatterctx,matctx->t1,matctx->vseq,INSERT_VALUES,SCATTER_FORWARD));
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115 PetscCall(VecGetArrayRead(matctx->vseq,&array));
693
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800 for (i=0;i<k;i++) dHi[i] = array[i];
694
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115 PetscCall(VecRestoreArrayRead(matctx->vseq,&array));
695 }
696
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33 PetscFunctionReturn(PETSC_SUCCESS);
697 }
698
699 1085 static PetscErrorCode NRefSysIter(PetscInt i,PEP pep,PetscInt k,KSP ksp,PetscScalar *fH,PetscScalar *S,PetscInt lds,PetscScalar *fh,PetscScalar *H,PetscInt ldh,Vec Rv,PetscScalar *Rh,BV V,Vec dVi,PetscScalar *dHi,PEP_REFINE_EXPLICIT *matctx,BV W)
700 {
701 1085 PetscInt j,m,lda=pep->nmat*k,n0,m0,idx;
702 1085 PetscMPIInt root,len;
703 1085 PetscScalar *array2,h;
704 1085 const PetscScalar *array;
705 1085 Vec R,Vi;
706 1085 PEP_REFINE_MATSHELL *ctx;
707 1085 Mat M;
708
709
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1085 PetscFunctionBegin;
710
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1085 if (!matctx || !matctx->subc) {
711
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3540 for (j=0;j<pep->nmat;j++) fh[j] = fH[j*k+i+i*lda];
712 885 h = H[i+i*ldh];
713 885 idx = i;
714 885 R = Rv;
715 885 Vi = dVi;
716
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885 switch (pep->scheme) {
717 115 case PEP_REFINE_SCHEME_EXPLICIT:
718
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115 PetscCall(NRefSysSetup_explicit(pep,k,ksp,fH,S,lds,fh,h,V,matctx,W));
719 115 matctx->compM1 = PETSC_FALSE;
720 115 break;
721 115 case PEP_REFINE_SCHEME_MBE:
722
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115 PetscCall(NRefSysSetup_mbe(pep,k,ksp,fH,S,lds,fh,h,V,matctx));
723 115 matctx->compM1 = PETSC_FALSE;
724 115 break;
725 655 case PEP_REFINE_SCHEME_SCHUR:
726
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655 PetscCall(KSPGetOperators(ksp,&M,NULL));
727
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655 PetscCall(MatShellGetContext(M,&ctx));
728
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655 PetscCall(NRefSysSetup_shell(pep,k,fH,S,lds,fh,h,ctx));
729 655 ctx->compM1 = PETSC_FALSE;
730 655 break;
731 }
732 } else {
733
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200 if (i%matctx->subc->n==0 && (idx=i+matctx->subc->color)<k) {
734
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400 for (j=0;j<pep->nmat;j++) fh[j] = fH[j*k+idx+idx*lda];
735 100 h = H[idx+idx*ldh];
736 100 matctx->idx = idx;
737
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100 switch (pep->scheme) {
738 50 case PEP_REFINE_SCHEME_EXPLICIT:
739
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50 PetscCall(NRefSysSetup_explicit(pep,k,ksp,fH,S,lds,fh,h,matctx->V,matctx,matctx->W));
740 50 matctx->compM1 = PETSC_FALSE;
741 50 break;
742 50 case PEP_REFINE_SCHEME_MBE:
743
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50 PetscCall(NRefSysSetup_mbe(pep,k,ksp,fH,S,lds,fh,h,matctx->V,matctx));
744 50 matctx->compM1 = PETSC_FALSE;
745 50 break;
746 case PEP_REFINE_SCHEME_SCHUR:
747 break;
748 }
749 100 } else idx = matctx->idx;
750
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200 PetscCall(VecScatterBegin(matctx->scatter_id[i%matctx->subc->n],Rv,matctx->tg,INSERT_VALUES,SCATTER_FORWARD));
751
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200 PetscCall(VecScatterEnd(matctx->scatter_id[i%matctx->subc->n],Rv,matctx->tg,INSERT_VALUES,SCATTER_FORWARD));
752
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200 PetscCall(VecGetArrayRead(matctx->tg,&array));
753
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200 PetscCall(VecPlaceArray(matctx->t,array));
754
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200 PetscCall(VecCopy(matctx->t,matctx->Rv));
755
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200 PetscCall(VecResetArray(matctx->t));
756
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200 PetscCall(VecRestoreArrayRead(matctx->tg,&array));
757 200 R = matctx->Rv;
758 200 Vi = matctx->Vi;
759 }
760
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1085 if (idx==i && idx<k) {
761
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985 switch (pep->scheme) {
762 165 case PEP_REFINE_SCHEME_EXPLICIT:
763
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165 PetscCall(NRefSysSolve_explicit(k,ksp,R,Rh,Vi,dHi,matctx));
764 break;
765 165 case PEP_REFINE_SCHEME_MBE:
766
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165 PetscCall(NRefSysSolve_mbe(k,k,matctx->W,matctx->w,matctx->Wt,matctx->wt,matctx->d,matctx->dt,ksp,matctx->M2,matctx->M3 ,matctx->M4,PETSC_FALSE,R,Rh,Vi,dHi,matctx->t));
767 break;
768 655 case PEP_REFINE_SCHEME_SCHUR:
769
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655 PetscCall(NRefSysSolve_shell(ksp,pep->nmat,R,Rh,k,Vi,dHi));
770 break;
771 }
772 8 }
773
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1085 if (matctx && matctx->subc) {
774
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200 PetscCall(VecGetLocalSize(Vi,&m));
775
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200 PetscCall(VecGetArrayRead(Vi,&array));
776
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200 PetscCall(VecGetArray(matctx->tg,&array2));
777
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200 PetscCall(PetscArraycpy(array2,array,m));
778
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200 PetscCall(VecRestoreArray(matctx->tg,&array2));
779
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200 PetscCall(VecRestoreArrayRead(Vi,&array));
780
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200 PetscCall(VecScatterBegin(matctx->scatter_id[i%matctx->subc->n],matctx->tg,dVi,INSERT_VALUES,SCATTER_REVERSE));
781
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200 PetscCall(VecScatterEnd(matctx->scatter_id[i%matctx->subc->n],matctx->tg,dVi,INSERT_VALUES,SCATTER_REVERSE));
782
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200 switch (pep->scheme) {
783 100 case PEP_REFINE_SCHEME_EXPLICIT:
784
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100 PetscCall(MatGetOwnershipRange(matctx->E[0],&n0,&m0));
785
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100 PetscCall(VecGetArrayRead(matctx->ttN,&array));
786
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100 PetscCall(VecPlaceArray(matctx->tp,array+m0-n0));
787
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100 PetscCall(VecScatterBegin(matctx->scatterp_id[i%matctx->subc->n],matctx->tp,matctx->tpg,INSERT_VALUES,SCATTER_FORWARD));
788
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100 PetscCall(VecScatterEnd(matctx->scatterp_id[i%matctx->subc->n],matctx->tp,matctx->tpg,INSERT_VALUES,SCATTER_FORWARD));
789
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100 PetscCall(VecResetArray(matctx->tp));
790
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100 PetscCall(VecRestoreArrayRead(matctx->ttN,&array));
791
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100 PetscCall(VecGetArrayRead(matctx->tpg,&array));
792
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620 for (j=0;j<k;j++) dHi[j] = array[j];
793
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100 PetscCall(VecRestoreArrayRead(matctx->tpg,&array));
794 break;
795 case PEP_REFINE_SCHEME_MBE:
796 root = 0;
797
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150 for (j=0;j<i%matctx->subc->n;j++) root += matctx->subc->subsize[j];
798
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100 PetscCall(PetscMPIIntCast(k,&len));
799
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200 PetscCallMPI(MPI_Bcast(dHi,len,MPIU_SCALAR,root,matctx->subc->dupparent));
800 break;
801 case PEP_REFINE_SCHEME_SCHUR:
802 break;
803 }
804 88 }
805
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217 PetscFunctionReturn(PETSC_SUCCESS);
806 }
807
808 140 static PetscErrorCode PEPNRefForwardSubstitution(PEP pep,PetscInt k,PetscScalar *S,PetscInt lds,PetscScalar *H,PetscInt ldh,PetscScalar *fH,BV dV,PetscScalar *dVS,PetscInt *rds,PetscScalar *dH,PetscInt lddh,KSP ksp,PEP_REFINE_EXPLICIT *matctx)
809 {
810 140 PetscInt i,nmat=pep->nmat,lda=nmat*k;
811 140 PetscScalar *fh,*Rh,*DfH;
812 140 PetscReal norm;
813 140 BV W;
814 140 Vec Rv,t,dvi;
815 140 PEP_REFINE_MATSHELL *ctx;
816 140 Mat M,*At;
817 140 PetscBool flg,lindep;
818
819
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140 PetscFunctionBegin;
820
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140 PetscCall(PetscMalloc2(nmat*k*k,&DfH,k,&Rh));
821 140 *rds = 0;
822
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140 PetscCall(BVCreateVec(pep->V,&Rv));
823
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140 switch (pep->scheme) {
824 40 case PEP_REFINE_SCHEME_EXPLICIT:
825
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40 PetscCall(BVCreateVec(pep->V,&t));
826
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40 PetscCall(BVDuplicateResize(pep->V,PetscMax(k,nmat),&W));
827
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40 PetscCall(PetscMalloc1(nmat,&fh));
828 break;
829 40 case PEP_REFINE_SCHEME_MBE:
830
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40 if (matctx->subc) {
831
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20 PetscCall(BVCreateVec(pep->V,&t));
832
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20 PetscCall(BVDuplicateResize(pep->V,PetscMax(k,nmat),&W));
833 } else {
834 20 W = matctx->W;
835
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20 PetscCall(PetscObjectReference((PetscObject)W));
836 20 t = matctx->t;
837
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20 PetscCall(PetscObjectReference((PetscObject)t));
838 }
839
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40 PetscCall(BVScale(matctx->W,0.0));
840
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40 PetscCall(BVScale(matctx->Wt,0.0));
841
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40 PetscCall(BVScale(matctx->M2,0.0));
842
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40 PetscCall(BVScale(matctx->M3,0.0));
843
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40 PetscCall(PetscMalloc1(nmat,&fh));
844 break;
845 60 case PEP_REFINE_SCHEME_SCHUR:
846
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60 PetscCall(KSPGetOperators(ksp,&M,NULL));
847
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60 PetscCall(MatShellGetContext(M,&ctx));
848
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60 PetscCall(BVCreateVec(pep->V,&t));
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60 PetscCall(BVDuplicateResize(pep->V,PetscMax(k,nmat),&W));
850 60 fh = ctx->fih;
851 60 break;
852 }
853
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140 PetscCall(PetscArrayzero(dVS,2*k*k));
854
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140 PetscCall(PetscArrayzero(DfH,lda*k));
855
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140 PetscCall(STGetTransform(pep->st,&flg));
856
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140 if (flg) {
857
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30 PetscCall(PetscMalloc1(pep->nmat,&At));
858
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120 for (i=0;i<pep->nmat;i++) PetscCall(STGetMatrixTransformed(pep->st,i,&At[i]));
859 110 } else At = pep->A;
860
861 /* Main loop for computing the i-th columns of dX and dS */
862
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1225 for (i=0;i<k;i++) {
863 /* Compute and update i-th column of the right hand side */
864
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1085 PetscCall(PetscArrayzero(Rh,k));
865
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1085 PetscCall(NRefRightSide(nmat,pep->pbc,At,k,pep->V,S,lds,i,H,ldh,fH,DfH,dH,dV,dVS,*rds,Rv,Rh,W,t));
866
867 /* Update and solve system */
868
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1085 PetscCall(BVGetColumn(dV,i,&dvi));
869
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1085 PetscCall(NRefSysIter(i,pep,k,ksp,fH,S,lds,fh,H,ldh,Rv,Rh,pep->V,dvi,dH+i*k,matctx,W));
870 /* Orthogonalize computed solution */
871
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1085 PetscCall(BVOrthogonalizeVec(pep->V,dvi,dVS+i*2*k,&norm,&lindep));
872
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1085 PetscCall(BVRestoreColumn(dV,i,&dvi));
873
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1085 if (!lindep) {
874
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1085 PetscCall(BVOrthogonalizeColumn(dV,i,dVS+k+i*2*k,&norm,&lindep));
875
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1085 if (!lindep) {
876 1085 dVS[k+i+i*2*k] = norm;
877
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1085 PetscCall(BVScaleColumn(dV,i,1.0/norm));
878 1085 (*rds)++;
879 }
880 }
881 }
882
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140 PetscCall(BVSetActiveColumns(dV,0,*rds));
883
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140 PetscCall(VecDestroy(&t));
884
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140 PetscCall(VecDestroy(&Rv));
885
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140 PetscCall(BVDestroy(&W));
886
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140 if (flg) PetscCall(PetscFree(At));
887
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140 PetscCall(PetscFree2(DfH,Rh));
888
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140 if (pep->scheme!=PEP_REFINE_SCHEME_SCHUR) PetscCall(PetscFree(fh));
889
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28 PetscFunctionReturn(PETSC_SUCCESS);
890 }
891
892 280 static PetscErrorCode NRefOrthogStep(PEP pep,PetscInt k,PetscScalar *H,PetscInt ldh,PetscScalar *fH,PetscScalar *S,PetscInt lds)
893 {
894 280 PetscInt j,nmat=pep->nmat,deg=nmat-1,lda=nmat*k,ldg;
895 280 PetscScalar *G,*tau,sone=1.0,zero=0.0,*work;
896 280 PetscBLASInt lds_,k_,ldh_,ldg_,lda_;
897
898
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280 PetscFunctionBegin;
899
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280 PetscCall(PetscMalloc3(k,&tau,k,&work,deg*k*k,&G));
900
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280 PetscCall(PetscBLASIntCast(lds,&lds_));
901
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280 PetscCall(PetscBLASIntCast(lda,&lda_));
902
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280 PetscCall(PetscBLASIntCast(k,&k_));
903
904 /* Form auxiliary matrix for the orthogonalization step */
905 280 ldg = deg*k;
906
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280 PetscCall(PEPEvaluateBasisforMatrix(pep,nmat,k,H,ldh,fH));
907
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280 PetscCall(PetscBLASIntCast(ldg,&ldg_));
908
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280 PetscCall(PetscBLASIntCast(ldh,&ldh_));
909
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840 for (j=0;j<deg;j++) {
910
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560 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&k_,&k_,&k_,&sone,S,&lds_,fH+j*k,&lda_,&zero,G+j*k,&ldg_));
911 }
912 /* Orthogonalize and update S */
913
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280 PetscCall(PetscFPTrapPush(PETSC_FP_TRAP_OFF));
914
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280 PetscCallLAPACKInfo("LAPACKgeqrf",LAPACKgeqrf_(&ldg_,&k_,G,&ldg_,tau,work,&k_,&info));
915
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280 PetscCall(PetscFPTrapPop());
916
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280 PetscCallBLAS("BLAStrsm",BLAStrsm_("R","U","N","N",&k_,&k_,&sone,G,&ldg_,S,&lds_));
917
918 /* Update H */
919
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280 PetscCallBLAS("BLAStrmm",BLAStrmm_("L","U","N","N",&k_,&k_,&sone,G,&ldg_,H,&ldh_));
920
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280 PetscCallBLAS("BLAStrsm",BLAStrsm_("R","U","N","N",&k_,&k_,&sone,G,&ldg_,H,&ldh_));
921
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280 PetscCall(PetscFree3(tau,work,G));
922
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56 PetscFunctionReturn(PETSC_SUCCESS);
923 }
924
925 140 static PetscErrorCode PEPNRefUpdateInvPair(PEP pep,PetscInt k,PetscScalar *H,PetscInt ldh,PetscScalar *fH,PetscScalar *dH,PetscScalar *S,PetscInt lds,BV dV,PetscScalar *dVS,PetscInt rds)
926 {
927 140 PetscInt i,j,nmat=pep->nmat,lda=nmat*k;
928 140 PetscScalar *tau,*array,*work;
929 140 PetscBLASInt lds_,k_,lda_,ldh_,kdrs_,k2_;
930 140 Mat M0;
931
932
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140 PetscFunctionBegin;
933
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140 PetscCall(PetscMalloc2(k,&tau,k,&work));
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140 PetscCall(PetscBLASIntCast(lds,&lds_));
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140 PetscCall(PetscBLASIntCast(lda,&lda_));
936
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140 PetscCall(PetscBLASIntCast(ldh,&ldh_));
937
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140 PetscCall(PetscBLASIntCast(k,&k_));
938
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140 PetscCall(PetscBLASIntCast(2*k,&k2_));
939
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140 PetscCall(PetscBLASIntCast((k+rds),&kdrs_));
940 /* Update H */
941
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1225 for (j=0;j<k;j++) {
942
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11480 for (i=0;i<k;i++) H[i+j*ldh] -= dH[i+j*k];
943 }
944 /* Update V */
945
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1225 for (j=0;j<k;j++) {
946
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11480 for (i=0;i<k;i++) dVS[i+j*2*k] = -dVS[i+j*2*k]+S[i+j*lds];
947
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11480 for (i=k;i<2*k;i++) dVS[i+j*2*k] = -dVS[i+j*2*k];
948 }
949
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140 PetscCall(PetscFPTrapPush(PETSC_FP_TRAP_OFF));
950
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140 PetscCallLAPACKInfo("LAPACKgeqrf",LAPACKgeqrf_(&kdrs_,&k_,dVS,&k2_,tau,work,&k_,&info));
951 /* Copy triangular matrix in S */
952
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1225 for (j=0;j<k;j++) {
953
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6825 for (i=0;i<=j;i++) S[i+j*lds] = dVS[i+j*2*k];
954
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5740 for (i=j+1;i<k;i++) S[i+j*lds] = 0.0;
955 }
956
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140 PetscCallLAPACKInfo("LAPACKorgqr",LAPACKorgqr_(&k2_,&k_,&k_,dVS,&k2_,tau,work,&k_,&info));
957
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140 PetscCall(PetscFPTrapPop());
958
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140 PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,k,k,NULL,&M0));
959
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140 PetscCall(MatDenseGetArrayWrite(M0,&array));
960
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1225 for (j=0;j<k;j++) PetscCall(PetscArraycpy(array+j*k,dVS+j*2*k,k));
961
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140 PetscCall(MatDenseRestoreArrayWrite(M0,&array));
962
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140 PetscCall(BVMultInPlace(pep->V,M0,0,k));
963
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140 if (rds) {
964
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140 PetscCall(MatDenseGetArrayWrite(M0,&array));
965
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1225 for (j=0;j<k;j++) PetscCall(PetscArraycpy(array+j*k,dVS+k+j*2*k,rds));
966
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140 PetscCall(MatDenseRestoreArrayWrite(M0,&array));
967
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140 PetscCall(BVMultInPlace(dV,M0,0,k));
968
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140 PetscCall(BVMult(pep->V,1.0,1.0,dV,NULL));
969 }
970
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140 PetscCall(MatDestroy(&M0));
971
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140 PetscCall(NRefOrthogStep(pep,k,H,ldh,fH,S,lds));
972
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140 PetscCall(PetscFree2(tau,work));
973
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28 PetscFunctionReturn(PETSC_SUCCESS);
974 }
975
976 140 static PetscErrorCode PEPNRefSetUp(PEP pep,PetscInt k,PetscScalar *H,PetscInt ldh,PEP_REFINE_EXPLICIT *matctx,PetscBool ini)
977 {
978 140 PEP_REFINE_MATSHELL *ctx;
979 140 PetscScalar t,*coef;
980 140 const PetscScalar *array;
981 140 MatStructure str;
982 140 PetscInt j,nmat=pep->nmat,n0,m0,n1,m1,n0_,m0_,n1_,m1_,N0,N1,p,*idx1,*idx2,count,si,i,l0;
983 140 MPI_Comm comm;
984 140 PetscMPIInt np;
985 140 const PetscInt *rgs0,*rgs1;
986 140 Mat B,C,*E,*A,*At;
987 140 IS is1,is2;
988 140 Vec v;
989 140 PetscBool flg;
990 140 Mat M,P;
991
992
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140 PetscFunctionBegin;
993
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140 PetscCall(PetscMalloc1(nmat,&coef));
994
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140 PetscCall(STGetTransform(pep->st,&flg));
995
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140 if (flg) {
996
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30 PetscCall(PetscMalloc1(pep->nmat,&At));
997
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120 for (i=0;i<pep->nmat;i++) PetscCall(STGetMatrixTransformed(pep->st,i,&At[i]));
998 110 } else At = pep->A;
999
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140 switch (pep->scheme) {
1000 40 case PEP_REFINE_SCHEME_EXPLICIT:
1001
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40 if (ini) {
1002
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40 if (matctx->subc) {
1003 20 A = matctx->A;
1004
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20 PetscCall(PetscSubcommGetChild(matctx->subc,&comm));
1005 } else {
1006 20 A = At;
1007
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20 PetscCall(PetscObjectGetComm((PetscObject)pep,&comm));
1008 }
1009 40 E = matctx->E;
1010
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40 PetscCall(STGetMatStructure(pep->st,&str));
1011
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40 PetscCall(MatDuplicate(A[0],MAT_COPY_VALUES,&E[0]));
1012
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40 j = (matctx->subc)?matctx->subc->color:0;
1013
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40 PetscCall(PEPEvaluateBasis(pep,H[j+j*ldh],0,coef,NULL));
1014
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120 for (j=1;j<nmat;j++) PetscCall(MatAXPY(E[0],coef[j],A[j],str));
1015
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40 PetscCall(MatCreateDense(comm,PETSC_DECIDE,PETSC_DECIDE,k,k,NULL,&E[1]));
1016
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40 PetscCall(MatGetOwnershipRange(E[0],&n0,&m0));
1017
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40 PetscCall(MatGetOwnershipRange(E[1],&n1,&m1));
1018
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40 PetscCall(MatGetOwnershipRangeColumn(E[0],&n0_,&m0_));
1019
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40 PetscCall(MatGetOwnershipRangeColumn(E[1],&n1_,&m1_));
1020 /* T12 and T21 are computed from V and V*, so,
1021 they must have the same column and row ranges */
1022
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40 PetscCheck(m0_-n0_==m0-n0,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Inconsistent dimensions");
1023
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40 PetscCall(MatCreateDense(comm,m0-n0,m1_-n1_,PETSC_DECIDE,PETSC_DECIDE,NULL,&B));
1024
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40 PetscCall(MatCreateDense(comm,m1-n1,m0_-n0_,PETSC_DECIDE,PETSC_DECIDE,NULL,&C));
1025
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40 PetscCall(MatCreateTile(1.0,E[0],1.0,B,1.0,C,1.0,E[1],&M));
1026
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40 PetscCall(MatDestroy(&B));
1027
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40 PetscCall(MatDestroy(&C));
1028 40 matctx->compM1 = PETSC_TRUE;
1029
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40 PetscCall(MatGetSize(E[0],NULL,&N0));
1030
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40 PetscCall(MatGetSize(E[1],NULL,&N1));
1031
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40 PetscCallMPI(MPI_Comm_size(PetscObjectComm((PetscObject)M),&np));
1032
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40 PetscCall(MatGetOwnershipRanges(E[0],&rgs0));
1033
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40 PetscCall(MatGetOwnershipRanges(E[1],&rgs1));
1034
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40 PetscCall(PetscMalloc4(PetscMax(k,N1),&matctx->idxp,N0,&matctx->idxg,N0,&matctx->map0,N1,&matctx->map1));
1035 /* Create column (and row) mapping */
1036
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80 for (p=0;p<np;p++) {
1037
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1240 for (j=rgs0[p];j<rgs0[p+1];j++) matctx->map0[j] = j+rgs1[p];
1038
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255 for (j=rgs1[p];j<rgs1[p+1];j++) matctx->map1[j] = j+rgs0[p+1];
1039 }
1040
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40 PetscCall(MatCreateVecs(M,NULL,&matctx->tN));
1041
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40 PetscCall(MatCreateVecs(matctx->E[1],NULL,&matctx->t1));
1042
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40 PetscCall(VecDuplicate(matctx->tN,&matctx->ttN));
1043
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40 if (matctx->subc) {
1044
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20 PetscCallMPI(MPI_Comm_size(PetscObjectComm((PetscObject)pep),&np));
1045 20 count = np*k;
1046
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20 PetscCall(PetscMalloc2(count,&idx1,count,&idx2));
1047
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20 PetscCall(VecCreateMPI(PetscObjectComm((PetscObject)pep),m1-n1,PETSC_DECIDE,&matctx->tp));
1048
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20 PetscCall(VecGetOwnershipRange(matctx->tp,&l0,NULL));
1049
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20 PetscCall(VecCreateMPI(PetscObjectComm((PetscObject)pep),k,PETSC_DECIDE,&matctx->tpg));
1050
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60 for (si=0;si<matctx->subc->n;si++) {
1051
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40 if (matctx->subc->color==si) {
1052 j=0;
1053 if (matctx->subc->color==si) {
1054
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60 for (p=0;p<np;p++) {
1055
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240 for (i=n1;i<m1;i++) {
1056 200 idx1[j] = l0+i-n1;
1057 200 idx2[j++] =p*k+i;
1058 }
1059 }
1060 }
1061 20 count = np*(m1-n1);
1062 } else count =0;
1063
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40 PetscCall(ISCreateGeneral(PetscObjectComm((PetscObject)pep),count,idx1,PETSC_COPY_VALUES,&is1));
1064
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40 PetscCall(ISCreateGeneral(PetscObjectComm((PetscObject)pep),count,idx2,PETSC_COPY_VALUES,&is2));
1065
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40 PetscCall(VecScatterCreate(matctx->tp,is1,matctx->tpg,is2,&matctx->scatterp_id[si]));
1066
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40 PetscCall(ISDestroy(&is1));
1067
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40 PetscCall(ISDestroy(&is2));
1068 }
1069
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20 PetscCall(PetscFree2(idx1,idx2));
1070
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20 } else PetscCall(VecScatterCreateToAll(matctx->t1,&matctx->scatterctx,&matctx->vseq));
1071 40 P = M;
1072 } else {
1073 if (matctx->subc) {
1074 /* Scatter vectors pep->V */
1075 for (i=0;i<k;i++) {
1076 PetscCall(BVGetColumn(pep->V,i,&v));
1077 PetscCall(VecScatterBegin(matctx->scatter_sub,v,matctx->tg,INSERT_VALUES,SCATTER_FORWARD));
1078 PetscCall(VecScatterEnd(matctx->scatter_sub,v,matctx->tg,INSERT_VALUES,SCATTER_FORWARD));
1079 PetscCall(BVRestoreColumn(pep->V,i,&v));
1080 PetscCall(VecGetArrayRead(matctx->tg,&array));
1081 PetscCall(VecPlaceArray(matctx->t,(const PetscScalar*)array));
1082 PetscCall(BVInsertVec(matctx->V,i,matctx->t));
1083 PetscCall(VecResetArray(matctx->t));
1084 PetscCall(VecRestoreArrayRead(matctx->tg,&array));
1085 }
1086 }
1087 }
1088 break;
1089 40 case PEP_REFINE_SCHEME_MBE:
1090
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40 if (ini) {
1091
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40 if (matctx->subc) {
1092 20 A = matctx->A;
1093
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20 PetscCall(PetscSubcommGetChild(matctx->subc,&comm));
1094 } else {
1095 20 matctx->V = pep->V;
1096 20 A = At;
1097
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20 PetscCall(PetscObjectGetComm((PetscObject)pep,&comm));
1098
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20 PetscCall(MatCreateVecs(pep->A[0],&matctx->t,NULL));
1099 }
1100
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40 PetscCall(STGetMatStructure(pep->st,&str));
1101
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40 PetscCall(MatDuplicate(A[0],MAT_COPY_VALUES,&matctx->M1));
1102
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40 j = (matctx->subc)?matctx->subc->color:0;
1103
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40 PetscCall(PEPEvaluateBasis(pep,H[j+j*ldh],0,coef,NULL));
1104
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120 for (j=1;j<nmat;j++) PetscCall(MatAXPY(matctx->M1,coef[j],A[j],str));
1105
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40 PetscCall(BVDuplicateResize(matctx->V,PetscMax(k,pep->nmat),&matctx->W));
1106
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40 PetscCall(BVDuplicateResize(matctx->V,k,&matctx->M2));
1107
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40 PetscCall(BVDuplicate(matctx->M2,&matctx->M3));
1108
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40 PetscCall(BVDuplicate(matctx->M2,&matctx->Wt));
1109
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40 PetscCall(PetscMalloc5(k*k,&matctx->M4,k*k,&matctx->w,k*k,&matctx->wt,k,&matctx->d,k,&matctx->dt));
1110 40 matctx->compM1 = PETSC_TRUE;
1111 40 M = matctx->M1;
1112 40 P = M;
1113 }
1114 break;
1115 60 case PEP_REFINE_SCHEME_SCHUR:
1116
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60 if (ini) {
1117
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60 PetscCall(PetscObjectGetComm((PetscObject)pep,&comm));
1118
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60 PetscCall(MatGetSize(At[0],&m0,&n0));
1119
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60 PetscCall(PetscMalloc1(1,&ctx));
1120
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60 PetscCall(STGetMatStructure(pep->st,&str));
1121 /* Create a shell matrix to solve the linear system */
1122 60 ctx->V = pep->V;
1123 60 ctx->k = k; ctx->nmat = nmat;
1124
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60 PetscCall(PetscMalloc5(nmat,&ctx->A,k*k,&ctx->M4,k,&ctx->pM4,2*k*k,&ctx->work,nmat,&ctx->fih));
1125
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240 for (i=0;i<nmat;i++) ctx->A[i] = At[i];
1126
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60 PetscCall(PetscArrayzero(ctx->M4,k*k));
1127
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60 PetscCall(MatCreateShell(comm,PETSC_DECIDE,PETSC_DECIDE,m0,n0,ctx,&M));
1128
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60 PetscCall(MatShellSetOperation(M,MATOP_MULT,(PetscErrorCodeFn*)MatMult_FS));
1129
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60 PetscCall(BVDuplicateResize(ctx->V,PetscMax(k,pep->nmat),&ctx->W));
1130
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60 PetscCall(BVDuplicateResize(ctx->V,k,&ctx->M2));
1131
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60 PetscCall(BVDuplicate(ctx->M2,&ctx->M3));
1132
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60 PetscCall(BVCreateVec(pep->V,&ctx->t));
1133
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60 PetscCall(MatDuplicate(At[0],MAT_COPY_VALUES,&ctx->M1));
1134
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60 PetscCall(PEPEvaluateBasis(pep,H[0],0,coef,NULL));
1135
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180 for (j=1;j<nmat;j++) PetscCall(MatAXPY(ctx->M1,coef[j],At[j],str));
1136
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60 PetscCall(MatDuplicate(At[0],MAT_COPY_VALUES,&P));
1137 /* Compute a precond matrix for the system */
1138 60 t = H[0];
1139
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60 PetscCall(PEPEvaluateBasis(pep,t,0,coef,NULL));
1140
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180 for (j=1;j<nmat;j++) PetscCall(MatAXPY(P,coef[j],At[j],str));
1141 60 ctx->compM1 = PETSC_TRUE;
1142 }
1143 break;
1144 }
1145
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140 if (ini) {
1146
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140 PetscCall(PEPRefineGetKSP(pep,&pep->refineksp));
1147
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140 PetscCall(KSPSetErrorIfNotConverged(pep->refineksp,PETSC_TRUE));
1148
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140 PetscCall(PEP_KSPSetOperators(pep->refineksp,M,P));
1149
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140 PetscCall(KSPSetFromOptions(pep->refineksp));
1150 }
1151
1152
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140 if (!ini && matctx && matctx->subc) {
1153 /* Scatter vectors pep->V */
1154 for (i=0;i<k;i++) {
1155 PetscCall(BVGetColumn(pep->V,i,&v));
1156 PetscCall(VecScatterBegin(matctx->scatter_sub,v,matctx->tg,INSERT_VALUES,SCATTER_FORWARD));
1157 PetscCall(VecScatterEnd(matctx->scatter_sub,v,matctx->tg,INSERT_VALUES,SCATTER_FORWARD));
1158 PetscCall(BVRestoreColumn(pep->V,i,&v));
1159 PetscCall(VecGetArrayRead(matctx->tg,&array));
1160 PetscCall(VecPlaceArray(matctx->t,(const PetscScalar*)array));
1161 PetscCall(BVInsertVec(matctx->V,i,matctx->t));
1162 PetscCall(VecResetArray(matctx->t));
1163 PetscCall(VecRestoreArrayRead(matctx->tg,&array));
1164 }
1165 }
1166
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140 PetscCall(PetscFree(coef));
1167
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140 if (flg) PetscCall(PetscFree(At));
1168
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28 PetscFunctionReturn(PETSC_SUCCESS);
1169 }
1170
1171 40 static PetscErrorCode NRefSubcommSetup(PEP pep,PetscInt k,PEP_REFINE_EXPLICIT *matctx,PetscInt nsubc)
1172 {
1173 40 PetscInt i,si,j,m0,n0,nloc0,nloc_sub,*idx1,*idx2;
1174 40 IS is1,is2;
1175 40 BVType type;
1176 40 Vec v;
1177 40 const PetscScalar *array;
1178 40 Mat *A;
1179 40 PetscBool flg;
1180 40 MPI_Comm contpar,child;
1181
1182
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40 PetscFunctionBegin;
1183
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40 PetscCall(STGetTransform(pep->st,&flg));
1184
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40 if (flg) {
1185 PetscCall(PetscMalloc1(pep->nmat,&A));
1186 for (i=0;i<pep->nmat;i++) PetscCall(STGetMatrixTransformed(pep->st,i,&A[i]));
1187 40 } else A = pep->A;
1188
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40 PetscCall(PetscSubcommGetChild(matctx->subc,&child));
1189
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40 PetscCall(PetscSubcommGetContiguousParent(matctx->subc,&contpar));
1190
1191 /* Duplicate pep matrices */
1192
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40 PetscCall(PetscMalloc3(pep->nmat,&matctx->A,nsubc,&matctx->scatter_id,nsubc,&matctx->scatterp_id));
1193
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160 for (i=0;i<pep->nmat;i++) PetscCall(MatCreateRedundantMatrix(A[i],0,child,MAT_INITIAL_MATRIX,&matctx->A[i]));
1194
1195 /* Create Scatter */
1196
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40 PetscCall(MatCreateVecs(matctx->A[0],&matctx->t,NULL));
1197
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40 PetscCall(MatGetLocalSize(matctx->A[0],&nloc_sub,NULL));
1198
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40 PetscCall(VecCreateMPI(contpar,nloc_sub,PETSC_DECIDE,&matctx->tg));
1199
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40 PetscCall(BVGetColumn(pep->V,0,&v));
1200
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40 PetscCall(VecGetOwnershipRange(v,&n0,&m0));
1201 40 nloc0 = m0-n0;
1202
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40 PetscCall(PetscMalloc2(matctx->subc->n*nloc0,&idx1,matctx->subc->n*nloc0,&idx2));
1203 j = 0;
1204
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120 for (si=0;si<matctx->subc->n;si++) {
1205
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1280 for (i=n0;i<m0;i++) {
1206 1200 idx1[j] = i;
1207 1200 idx2[j++] = i+pep->n*si;
1208 }
1209 }
1210
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40 PetscCall(ISCreateGeneral(PetscObjectComm((PetscObject)pep),matctx->subc->n*nloc0,idx1,PETSC_COPY_VALUES,&is1));
1211
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40 PetscCall(ISCreateGeneral(PetscObjectComm((PetscObject)pep),matctx->subc->n*nloc0,idx2,PETSC_COPY_VALUES,&is2));
1212
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40 PetscCall(VecScatterCreate(v,is1,matctx->tg,is2,&matctx->scatter_sub));
1213
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40 PetscCall(ISDestroy(&is1));
1214
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40 PetscCall(ISDestroy(&is2));
1215
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120 for (si=0;si<matctx->subc->n;si++) {
1216 80 j=0;
1217
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1280 for (i=n0;i<m0;i++) {
1218 1200 idx1[j] = i;
1219 1200 idx2[j++] = i+pep->n*si;
1220 }
1221
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80 PetscCall(ISCreateGeneral(PetscObjectComm((PetscObject)pep),nloc0,idx1,PETSC_COPY_VALUES,&is1));
1222
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80 PetscCall(ISCreateGeneral(PetscObjectComm((PetscObject)pep),nloc0,idx2,PETSC_COPY_VALUES,&is2));
1223
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80 PetscCall(VecScatterCreate(v,is1,matctx->tg,is2,&matctx->scatter_id[si]));
1224
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80 PetscCall(ISDestroy(&is1));
1225
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80 PetscCall(ISDestroy(&is2));
1226 }
1227
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40 PetscCall(BVRestoreColumn(pep->V,0,&v));
1228
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40 PetscCall(PetscFree2(idx1,idx2));
1229
1230 /* Duplicate pep->V vecs */
1231
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40 PetscCall(BVGetType(pep->V,&type));
1232
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40 PetscCall(BVCreate(child,&matctx->V));
1233
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40 PetscCall(BVSetType(matctx->V,type));
1234
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40 PetscCall(BVSetSizesFromVec(matctx->V,matctx->t,k));
1235
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40 if (pep->scheme==PEP_REFINE_SCHEME_EXPLICIT) PetscCall(BVDuplicateResize(matctx->V,PetscMax(k,pep->nmat),&matctx->W));
1236
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240 for (i=0;i<k;i++) {
1237
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200 PetscCall(BVGetColumn(pep->V,i,&v));
1238
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200 PetscCall(VecScatterBegin(matctx->scatter_sub,v,matctx->tg,INSERT_VALUES,SCATTER_FORWARD));
1239
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200 PetscCall(VecScatterEnd(matctx->scatter_sub,v,matctx->tg,INSERT_VALUES,SCATTER_FORWARD));
1240
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200 PetscCall(BVRestoreColumn(pep->V,i,&v));
1241
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200 PetscCall(VecGetArrayRead(matctx->tg,&array));
1242
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200 PetscCall(VecPlaceArray(matctx->t,(const PetscScalar*)array));
1243
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200 PetscCall(BVInsertVec(matctx->V,i,matctx->t));
1244
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200 PetscCall(VecResetArray(matctx->t));
1245
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200 PetscCall(VecRestoreArrayRead(matctx->tg,&array));
1246 }
1247
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40 PetscCall(VecDuplicate(matctx->t,&matctx->Rv));
1249
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40 PetscCall(VecDuplicate(matctx->t,&matctx->Vi));
1250
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40 if (flg) PetscCall(PetscFree(A));
1251
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8 PetscFunctionReturn(PETSC_SUCCESS);
1252 }
1253
1254 40 static PetscErrorCode NRefSubcommDestroy(PEP pep,PEP_REFINE_EXPLICIT *matctx)
1255 {
1256 40 PetscInt i;
1257
1258
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40 PetscFunctionBegin;
1259
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40 PetscCall(VecScatterDestroy(&matctx->scatter_sub));
1260
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120 for (i=0;i<matctx->subc->n;i++) PetscCall(VecScatterDestroy(&matctx->scatter_id[i]));
1261
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160 for (i=0;i<pep->nmat;i++) PetscCall(MatDestroy(&matctx->A[i]));
1262
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40 if (pep->scheme==PEP_REFINE_SCHEME_EXPLICIT) {
1263
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60 for (i=0;i<matctx->subc->n;i++) PetscCall(VecScatterDestroy(&matctx->scatterp_id[i]));
1264
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20 PetscCall(VecDestroy(&matctx->tp));
1265
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20 PetscCall(VecDestroy(&matctx->tpg));
1266
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20 PetscCall(BVDestroy(&matctx->W));
1267 }
1268
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40 PetscCall(PetscFree3(matctx->A,matctx->scatter_id,matctx->scatterp_id));
1269
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40 PetscCall(BVDestroy(&matctx->V));
1270
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40 PetscCall(VecDestroy(&matctx->t));
1271
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40 PetscCall(VecDestroy(&matctx->tg));
1272
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40 PetscCall(VecDestroy(&matctx->Rv));
1273
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40 PetscCall(VecDestroy(&matctx->Vi));
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8 PetscFunctionReturn(PETSC_SUCCESS);
1275 }
1276
1277 140 PetscErrorCode PEPNewtonRefinement_TOAR(PEP pep,PetscScalar sigma,PetscInt *maxits,PetscReal *tol,PetscInt k,PetscScalar *S,PetscInt lds)
1278 {
1279 140 PetscScalar *H,*work,*dH,*fH,*dVS;
1280 140 PetscInt ldh,i,j,its=1,nmat=pep->nmat,nsubc=pep->npart,rds;
1281 140 PetscBLASInt k_,ld_,*p;
1282 140 BV dV;
1283 140 PetscBool sinvert,flg;
1284 140 PEP_REFINE_EXPLICIT *matctx=NULL;
1285 140 Vec v;
1286 140 Mat M,P;
1287 140 PEP_REFINE_MATSHELL *ctx;
1288
1289
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140 PetscFunctionBegin;
1290
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140 PetscCall(PetscLogEventBegin(PEP_Refine,pep,0,0,0));
1291
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140 PetscCheck(k<=pep->n,PetscObjectComm((PetscObject)pep),PETSC_ERR_SUP,"Multiple Refinement available only for invariant pairs of dimension smaller than n=%" PetscInt_FMT,pep->n);
1292 /* the input tolerance is not being taken into account (by the moment) */
1293 140 its = *maxits;
1294
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140 PetscCall(PetscMalloc3(k*k,&dH,nmat*k*k,&fH,k,&work));
1295
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140 PetscCall(DSGetLeadingDimension(pep->ds,&ldh));
1296
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140 PetscCall(PetscMalloc1(2*k*k,&dVS));
1297
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140 PetscCall(STGetTransform(pep->st,&flg));
1298
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140 if (!flg && pep->st && pep->ops->backtransform) { /* BackTransform */
1299
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110 PetscCall(PetscBLASIntCast(k,&k_));
1300
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110 PetscCall(PetscBLASIntCast(ldh,&ld_));
1301
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110 PetscCall(PetscObjectTypeCompare((PetscObject)pep->st,STSINVERT,&sinvert));
1302
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110 if (sinvert) {
1303
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70 PetscCall(DSGetArray(pep->ds,DS_MAT_A,&H));
1304
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70 PetscCall(PetscMalloc1(k,&p));
1305
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70 PetscCall(PetscFPTrapPush(PETSC_FP_TRAP_OFF));
1306
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70 PetscCallLAPACKInfo("LAPACKgetrf",LAPACKgetrf_(&k_,&k_,H,&ld_,p,&info));
1307
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70 PetscCallLAPACKInfo("LAPACKgetri",LAPACKgetri_(&k_,H,&ld_,p,work,&k_,&info));
1308
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70 PetscCall(PetscFPTrapPop());
1309
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70 PetscCall(DSRestoreArray(pep->ds,DS_MAT_A,&H));
1310 70 pep->ops->backtransform = NULL;
1311 }
1312
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110 if (sigma!=0.0) {
1313
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70 PetscCall(DSGetArray(pep->ds,DS_MAT_A,&H));
1314
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420 for (i=0;i<k;i++) H[i+ldh*i] += sigma;
1315
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70 PetscCall(DSRestoreArray(pep->ds,DS_MAT_A,&H));
1316 70 pep->ops->backtransform = NULL;
1317 }
1318 }
1319
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140 if ((pep->scale==PEP_SCALE_BOTH || pep->scale==PEP_SCALE_SCALAR) && pep->sfactor!=1.0) {
1320 PetscCall(DSGetArray(pep->ds,DS_MAT_A,&H));
1321 for (j=0;j<k;j++) {
1322 for (i=0;i<k;i++) H[i+j*ldh] *= pep->sfactor;
1323 }
1324 PetscCall(DSRestoreArray(pep->ds,DS_MAT_A,&H));
1325 if (!flg) {
1326 /* Restore original values */
1327 for (i=0;i<pep->nmat;i++) {
1328 pep->pbc[pep->nmat+i] *= pep->sfactor;
1329 pep->pbc[2*pep->nmat+i] *= pep->sfactor*pep->sfactor;
1330 }
1331 }
1332 }
1333
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140 if ((pep->scale==PEP_SCALE_DIAGONAL || pep->scale==PEP_SCALE_BOTH) && pep->Dr) {
1334
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240 for (i=0;i<k;i++) {
1335
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200 PetscCall(BVGetColumn(pep->V,i,&v));
1336
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200 PetscCall(VecPointwiseMult(v,v,pep->Dr));
1337
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200 PetscCall(BVRestoreColumn(pep->V,i,&v));
1338 }
1339 }
1340
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140 PetscCall(DSGetArray(pep->ds,DS_MAT_A,&H));
1341
1342
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140 PetscCall(NRefOrthogStep(pep,k,H,ldh,fH,S,lds));
1343 /* check if H is in Schur form */
1344
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1085 for (i=0;i<k-1;i++) {
1345 #if !defined(PETSC_USE_COMPLEX)
1346
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495 PetscCheck(H[i+1+i*ldh]==0.0,PetscObjectComm((PetscObject)pep),PETSC_ERR_SUP,"Iterative Refinement requires the complex Schur form of the projected matrix");
1347 #else
1348
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450 PetscCheck(H[i+1+i*ldh]==0.0,PetscObjectComm((PetscObject)pep),PETSC_ERR_SUP,"Iterative Refinement requires an upper triangular projected matrix");
1349 #endif
1350 }
1351
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140 PetscCheck(nsubc<=k,PetscObjectComm((PetscObject)pep),PETSC_ERR_SUP,"Number of subcommunicators should not be larger than the invariant pair dimension");
1352
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140 PetscCall(BVSetActiveColumns(pep->V,0,k));
1353
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140 PetscCall(BVDuplicateResize(pep->V,k,&dV));
1354
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140 if (pep->scheme!=PEP_REFINE_SCHEME_SCHUR) {
1355
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80 PetscCall(PetscMalloc1(1,&matctx));
1356
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80 if (nsubc>1) { /* splitting in subcommunicators */
1357 40 matctx->subc = pep->refinesubc;
1358
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40 PetscCall(NRefSubcommSetup(pep,k,matctx,nsubc));
1359 40 } else matctx->subc=NULL;
1360 }
1361
1362 /* Loop performing iterative refinements */
1363
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280 for (i=0;i<its;i++) {
1364 /* Pre-compute the polynomial basis evaluated in H */
1365
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140 PetscCall(PEPEvaluateBasisforMatrix(pep,nmat,k,H,ldh,fH));
1366
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140 PetscCall(PEPNRefSetUp(pep,k,H,ldh,matctx,PetscNot(i)));
1367 /* Solve the linear system */
1368
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140 PetscCall(PEPNRefForwardSubstitution(pep,k,S,lds,H,ldh,fH,dV,dVS,&rds,dH,k,pep->refineksp,matctx));
1369 /* Update X (=V*S) and H, and orthogonalize [X;X*fH1;...;XfH(deg-1)] */
1370
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140 PetscCall(PEPNRefUpdateInvPair(pep,k,H,ldh,fH,dH,S,lds,dV,dVS,rds));
1371 }
1372
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140 PetscCall(DSRestoreArray(pep->ds,DS_MAT_A,&H));
1373
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140 if (!flg && sinvert) PetscCall(PetscFree(p));
1374
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140 PetscCall(PetscFree3(dH,fH,work));
1375
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140 PetscCall(PetscFree(dVS));
1376
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140 PetscCall(BVDestroy(&dV));
1377
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140 switch (pep->scheme) {
1378 case PEP_REFINE_SCHEME_EXPLICIT:
1379
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120 for (i=0;i<2;i++) PetscCall(MatDestroy(&matctx->E[i]));
1380
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40 PetscCall(PetscFree4(matctx->idxp,matctx->idxg,matctx->map0,matctx->map1));
1381
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40 PetscCall(VecDestroy(&matctx->tN));
1382
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40 PetscCall(VecDestroy(&matctx->ttN));
1383
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40 PetscCall(VecDestroy(&matctx->t1));
1384
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40 if (nsubc>1) PetscCall(NRefSubcommDestroy(pep,matctx));
1385 else {
1386
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20 PetscCall(VecDestroy(&matctx->vseq));
1387
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20 PetscCall(VecScatterDestroy(&matctx->scatterctx));
1388 }
1389
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40 PetscCall(PetscFree(matctx));
1390
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40 PetscCall(KSPGetOperators(pep->refineksp,&M,NULL));
1391
4/6
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40 PetscCall(MatDestroy(&M));
1392 break;
1393 40 case PEP_REFINE_SCHEME_MBE:
1394
4/6
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40 PetscCall(BVDestroy(&matctx->W));
1395
4/6
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40 PetscCall(BVDestroy(&matctx->Wt));
1396
4/6
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40 PetscCall(BVDestroy(&matctx->M2));
1397
4/6
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40 PetscCall(BVDestroy(&matctx->M3));
1398
4/6
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40 PetscCall(MatDestroy(&matctx->M1));
1399
4/6
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40 PetscCall(VecDestroy(&matctx->t));
1400
4/6
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40 PetscCall(PetscFree5(matctx->M4,matctx->w,matctx->wt,matctx->d,matctx->dt));
1401
6/8
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40 if (nsubc>1) PetscCall(NRefSubcommDestroy(pep,matctx));
1402
5/8
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40 PetscCall(PetscFree(matctx));
1403 break;
1404 60 case PEP_REFINE_SCHEME_SCHUR:
1405
4/6
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60 PetscCall(KSPGetOperators(pep->refineksp,&M,&P));
1406
4/6
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60 PetscCall(MatShellGetContext(M,&ctx));
1407
4/6
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60 PetscCall(PetscFree5(ctx->A,ctx->M4,ctx->pM4,ctx->work,ctx->fih));
1408
4/6
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60 PetscCall(MatDestroy(&ctx->M1));
1409
4/6
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60 PetscCall(BVDestroy(&ctx->M2));
1410
4/6
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60 PetscCall(BVDestroy(&ctx->M3));
1411
4/6
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60 PetscCall(BVDestroy(&ctx->W));
1412
4/6
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60 PetscCall(VecDestroy(&ctx->t));
1413
5/8
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60 PetscCall(PetscFree(ctx));
1414
4/6
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60 PetscCall(MatDestroy(&M));
1415
4/6
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60 PetscCall(MatDestroy(&P));
1416 break;
1417 }
1418
4/6
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140 PetscCall(PetscLogEventEnd(PEP_Refine,pep,0,0,0));
1419
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28 PetscFunctionReturn(PETSC_SUCCESS);
1420 }
1421