GCC Code Coverage Report

Directory: ./
File: src/sys/classes/ds/tests/test23.c
Date: 2025-10-04 04:19:13
Exec Total Coverage
Lines: 123 127 96.9%
Functions: 1 1 100.0%
Branches: 306 500 61.2%
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 static char help[] = "Test interface functions of DSNEP.\n\n";
12
13 #include <slepcds.h>
14
15 10 int main(int argc,char **argv)
16 {
17 10 DS ds;
18 10 FN f1,f2,f3,funs[3];
19 10 SlepcSC sc;
20 10 PetscScalar *Id,*A,*B,*wr,*wi,*X,*W,coeffs[2],auxr,alpha;
21 10 PetscReal tau=0.001,h,a=20,xi,re,im,nrm,aux;
22 10 PetscInt i,j,ii,jj,k,n=10,ld,nev,nfun,midx,ip,rits,meth,spls;
23 10 PetscViewer viewer;
24 10 PetscBool verbose;
25 10 RG rg;
26 10 DSMatType mat[3]={DS_MAT_E0,DS_MAT_E1,DS_MAT_E2};
27 #if defined(PETSC_USE_COMPLEX)
28 5 PetscBool flg;
29 #else
30 5 PetscScalar auxi;
31 #endif
32
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 10 PetscFunctionBeginUser;
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 10 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
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 10 PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
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 10 PetscCall(PetscOptionsGetReal(NULL,NULL,"-tau",&tau,NULL));
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 10 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Solve a Dense System of type NEP - dimension %" PetscInt_FMT ", tau=%g.\n",n,(double)tau));
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 10 PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
39
40 /* Create DS object and set options */
41
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 10 PetscCall(DSCreate(PETSC_COMM_WORLD,&ds));
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 10 PetscCall(DSSetType(ds,DSNEP));
43 #if defined(PETSC_USE_COMPLEX)
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 5 PetscCall(DSSetMethod(ds,1)); /* contour integral */
45 #endif
46
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 10 PetscCall(DSNEPGetRG(ds,&rg));
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 10 PetscCall(RGSetType(rg,RGELLIPSE));
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 10 PetscCall(DSNEPSetMinimality(ds,1));
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 10 PetscCall(DSNEPSetIntegrationPoints(ds,16));
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 10 PetscCall(DSNEPSetRefine(ds,PETSC_CURRENT,2));
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 10 PetscCall(DSNEPSetSamplingSize(ds,25));
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 10 PetscCall(DSSetFromOptions(ds));
53
54 /* Print current options */
55
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 10 PetscCall(DSGetMethod(ds,&meth));
56 #if defined(PETSC_USE_COMPLEX)
57
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 5 PetscCheck(meth==1,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"This example requires ds_method=1");
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 5 PetscCall(RGIsTrivial(rg,&flg));
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 5 PetscCheck(!flg,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Must at least set the radius of the ellipse");
60 #endif
61
62
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 10 PetscCall(DSNEPGetMinimality(ds,&midx));
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 10 PetscCall(DSNEPGetIntegrationPoints(ds,&ip));
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 10 PetscCall(DSNEPGetRefine(ds,NULL,&rits));
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 10 PetscCall(DSNEPGetSamplingSize(ds,&spls));
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 10 if (meth==1) {
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 5 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Contour integral method with %" PetscInt_FMT " integration points, minimality index %" PetscInt_FMT ", and sampling size %" PetscInt_FMT "\n",ip,midx,spls));
68
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 5 if (rits) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Doing %" PetscInt_FMT " iterations of Newton refinement\n",rits));
69 }
70
71 /* Set functions (prior to DSAllocate) */
72
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 10 PetscCall(FNCreate(PETSC_COMM_WORLD,&f1));
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 10 PetscCall(FNSetType(f1,FNRATIONAL));
74 10 coeffs[0] = -1.0; coeffs[1] = 0.0;
75
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 10 PetscCall(FNRationalSetNumerator(f1,2,coeffs));
76
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 10 PetscCall(FNCreate(PETSC_COMM_WORLD,&f2));
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 10 PetscCall(FNSetType(f2,FNRATIONAL));
79 10 coeffs[0] = 1.0;
80
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 10 PetscCall(FNRationalSetNumerator(f2,1,coeffs));
81
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 10 PetscCall(FNCreate(PETSC_COMM_WORLD,&f3));
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 10 PetscCall(FNSetType(f3,FNEXP));
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 10 PetscCall(FNSetScale(f3,-tau,1.0));
85
86 10 funs[0] = f1;
87 10 funs[1] = f2;
88 10 funs[2] = f3;
89
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 10 PetscCall(DSNEPSetFN(ds,3,funs));
90
91 /* Set dimensions */
92 10 ld = n;
93
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 10 PetscCall(DSAllocate(ds,ld));
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 10 PetscCall(DSSetDimensions(ds,n,0,0));
95
96 /* Set up viewer */
97
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 10 PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&viewer));
98
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 10 PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO_DETAIL));
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 10 PetscCall(PetscViewerPopFormat(viewer));
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 10 if (verbose) PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_MATLAB));
101
102 /* Fill matrices */
103
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 10 PetscCall(DSGetArray(ds,DS_MAT_E0,&Id));
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 110 for (i=0;i<n;i++) Id[i+i*ld]=1.0;
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 10 PetscCall(DSRestoreArray(ds,DS_MAT_E0,&Id));
106 10 h = PETSC_PI/(PetscReal)(n+1);
107
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 10 PetscCall(DSGetArray(ds,DS_MAT_E1,&A));
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 110 for (i=0;i<n;i++) A[i+i*ld]=-2.0/(h*h)+a;
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 100 for (i=1;i<n;i++) {
110 90 A[i+(i-1)*ld]=1.0/(h*h);
111 90 A[(i-1)+i*ld]=1.0/(h*h);
112 }
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 10 PetscCall(DSRestoreArray(ds,DS_MAT_E1,&A));
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 10 PetscCall(DSGetArray(ds,DS_MAT_E2,&B));
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 110 for (i=0;i<n;i++) {
116 100 xi = (i+1)*h;
117 100 B[i+i*ld] = -4.1+xi*(1.0-PetscExpReal(xi-PETSC_PI));
118 }
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 10 PetscCall(DSRestoreArray(ds,DS_MAT_E2,&B));
120
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 10 if (verbose) {
122 ✗ PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Initial - - - - - - - - -\n"));
123 ✗ PetscCall(DSView(ds,viewer));
124 }
125
126 /* Solve */
127
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 10 PetscCall(PetscCalloc2(n,&wr,n,&wi));
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 10 PetscCall(DSGetSlepcSC(ds,&sc));
129 10 sc->comparison = SlepcCompareLargestMagnitude;
130 10 sc->comparisonctx = NULL;
131 10 sc->map = NULL;
132 10 sc->mapobj = NULL;
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 10 PetscCall(DSSolve(ds,wr,wi));
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 10 PetscCall(DSSort(ds,wr,wi,NULL,NULL,NULL));
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 10 if (verbose) {
137 ✗ PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After solve - - - - - - - - -\n"));
138 ✗ PetscCall(DSView(ds,viewer));
139 }
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 10 PetscCall(DSGetDimensions(ds,NULL,NULL,NULL,&nev));
141
142 /* Print computed eigenvalues */
143
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 10 PetscCall(DSNEPGetNumFN(ds,&nfun));
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 10 PetscCall(PetscMalloc1(ld*ld,&W));
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 10 PetscCall(DSVectors(ds,DS_MAT_X,NULL,NULL));
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 10 PetscCall(DSGetArray(ds,DS_MAT_X,&X));
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 10 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Computed eigenvalues =\n"));
148
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 30 for (i=0;i<nev;i++) {
149 #if defined(PETSC_USE_COMPLEX)
150 15 re = PetscRealPart(wr[i]);
151 15 im = PetscImaginaryPart(wr[i]);
152 #else
153 5 re = wr[i];
154 5 im = wi[i];
155 #endif
156 /* Residual */
157
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 20 PetscCall(PetscArrayzero(W,ld*ld));
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 80 for (k=0;k<nfun;k++) {
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 60 PetscCall(FNEvaluateFunction(funs[k],wr[i],&alpha));
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 60 PetscCall(DSGetArray(ds,mat[k],&A));
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 6660 for (jj=0;jj<n;jj++) for (ii=0;ii<n;ii++) W[jj*ld+ii] += alpha*A[jj*ld+ii];
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 60 PetscCall(DSRestoreArray(ds,mat[k],&A));
163 }
164 nrm = 0.0;
165
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 220 for (k=0;k<n;k++) {
166 auxr = 0.0;
167 #if !defined(PETSC_USE_COMPLEX)
168 auxi = 0.0;
169 #endif
170
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 2200 for (j=0;j<n;j++) {
171 2000 auxr += W[k+j*ld]*X[i*ld+j];
172 #if !defined(PETSC_USE_COMPLEX)
173
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 500 if (PetscAbs(wi[j])!=0.0) auxi += W[k+j*ld]*X[(i+1)*ld+j];
174 #endif
175 }
176 200 aux = SlepcAbsEigenvalue(auxr,auxi);
177 200 nrm += aux*aux;
178 }
179 20 nrm = PetscSqrtReal(nrm);
180
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 20 if (nrm>1000*n*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: the residual norm of the %" PetscInt_FMT "-th computed eigenpair %g\n",i,(double)nrm));
181
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 20 if (PetscAbs(im)<1e-10) PetscCall(PetscViewerASCIIPrintf(viewer," %.5f\n",(double)re));
182
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 20 else PetscCall(PetscViewerASCIIPrintf(viewer," %.5f%+.5fi\n",(double)re,(double)im));
183 }
184
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 10 PetscCall(PetscFree(W));
185
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 10 PetscCall(DSRestoreArray(ds,DS_MAT_X,&X));
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 10 PetscCall(DSRestoreArray(ds,DS_MAT_W,&W));
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 10 PetscCall(PetscFree2(wr,wi));
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 10 PetscCall(FNDestroy(&f1));
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 10 PetscCall(FNDestroy(&f2));
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 10 PetscCall(FNDestroy(&f3));
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 10 PetscCall(DSDestroy(&ds));
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 10 PetscCall(SlepcFinalize());
193 return 0;
194 }
195
196 /*TEST
197
198 testset:
199 test:
200 suffix: 1
201 requires: !complex
202 test:
203 suffix: 2
204 args: -ds_nep_rg_ellipse_radius 10
205 filter: sed -e "s/[+-]0\.0*i//g" | sed -e "s/37411/37410/"
206 requires: complex
207
208 TEST*/
209