GCC Code Coverage Report


Directory: ./
File: src/sys/classes/ds/tests/test15.c
Date: 2025-10-04 04:19:13
Exec Total Coverage
Lines: 77 83 92.8%
Functions: 1 1 100.0%
Branches: 188 328 57.3%

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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 DSPEP.\n\n";
12
13 #include <slepcds.h>
14
15 10 int main(int argc,char **argv)
16 {
17 10 DS ds;
18 10 SlepcSC sc;
19 10 Mat X;
20 10 Vec x0;
21 10 PetscScalar *K,*C,*M,*wr,*wi,z=1.0;
22 10 PetscReal re,im,nrm,*pbc;
23 10 PetscInt i,j,n=10,d=2,ld;
24 10 PetscViewer viewer;
25 10 PetscBool verbose;
26
27
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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(PetscPrintf(PETSC_COMM_WORLD,"Solve a Dense System of type PEP - n=%" PetscInt_FMT ".\n",n));
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10 PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
32
33 /* Create DS object */
34
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10 PetscCall(DSCreate(PETSC_COMM_WORLD,&ds));
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10 PetscCall(DSSetType(ds,DSPEP));
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10 PetscCall(DSSetFromOptions(ds));
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10 PetscCall(DSPEPSetDegree(ds,d));
38
39 /* Set dimensions */
40 10 ld = n+2; /* test leading dimension larger than n */
41
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10 PetscCall(DSAllocate(ds,ld));
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10 PetscCall(DSSetDimensions(ds,n,0,0));
43
44 /* Set up viewer */
45
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10 PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&viewer));
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10 PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO_DETAIL));
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10 PetscCall(DSView(ds,viewer));
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10 PetscCall(PetscViewerPopFormat(viewer));
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10 if (verbose) PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_MATLAB));
50
51 /* Fill matrices */
52
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10 PetscCall(DSGetArray(ds,DS_MAT_E0,&K));
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100 for (i=0;i<n-1;i++) K[i+i*ld] = 2.0*n;
54 10 K[n-1+(n-1)*ld] = 1.0*n;
55
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100 for (i=1;i<n;i++) {
56 90 K[i+(i-1)*ld] = -1.0*n;
57 90 K[(i-1)+i*ld] = -1.0*n;
58 }
59
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10 PetscCall(DSRestoreArray(ds,DS_MAT_E0,&K));
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10 PetscCall(DSGetArray(ds,DS_MAT_E1,&C));
61 10 C[n-1+(n-1)*ld] = 2.0*PETSC_PI/z;
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10 PetscCall(DSRestoreArray(ds,DS_MAT_E1,&C));
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10 PetscCall(DSGetArray(ds,DS_MAT_E2,&M));
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100 for (i=0;i<n-1;i++) M[i+i*ld] = -4.0*PETSC_PI*PETSC_PI/n;
65 10 M[i+i*ld] = -2.0*PETSC_PI*PETSC_PI/n;
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10 PetscCall(DSRestoreArray(ds,DS_MAT_E2,&M));
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10 if (verbose) {
69 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Initial - - - - - - - - -\n"));
70 PetscCall(DSView(ds,viewer));
71 }
72
73 /* Solve */
74
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10 PetscCall(PetscMalloc2(d*n,&wr,d*n,&wi));
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10 PetscCall(DSGetSlepcSC(ds,&sc));
76 10 sc->comparison = SlepcCompareLargestReal;
77 10 sc->comparisonctx = NULL;
78 10 sc->map = NULL;
79 10 sc->mapobj = NULL;
80
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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) {
83 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After solve - - - - - - - - -\n"));
84 PetscCall(DSView(ds,viewer));
85 }
86
87 /* Print polynomial coefficients */
88
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Polynomial coefficients (alpha,beta,gamma) =\n"));
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10 PetscCall(DSPEPGetCoefficients(ds,&pbc));
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40 for (j=0;j<3;j++) {
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120 for (i=0;i<d+1;i++) PetscCall(PetscViewerASCIIPrintf(viewer," %.5f",(double)pbc[j+3*i]));
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30 PetscCall(PetscViewerASCIIPrintf(viewer,"\n"));
93 }
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10 PetscCall(PetscFree(pbc));
95
96 /* Print eigenvalues */
97
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Computed eigenvalues =\n"));
98
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210 for (i=0;i<d*n;i++) {
99 #if defined(PETSC_USE_COMPLEX)
100 100 re = PetscRealPart(wr[i]);
101 100 im = PetscImaginaryPart(wr[i]);
102 #else
103 100 re = wr[i];
104 100 im = wi[i];
105 #endif
106
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200 if (PetscAbs(im)<1e-10) PetscCall(PetscViewerASCIIPrintf(viewer," %.5f\n",(double)re));
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200 else PetscCall(PetscViewerASCIIPrintf(viewer," %.5f%+.5fi\n",(double)re,(double)im));
108 }
109
110 /* Eigenvectors */
111
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10 PetscCall(DSVectors(ds,DS_MAT_X,NULL,NULL)); /* all eigenvectors */
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10 PetscCall(DSGetMat(ds,DS_MAT_X,&X));
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10 PetscCall(MatCreateVecs(X,NULL,&x0));
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10 PetscCall(MatGetColumnVector(X,x0,0));
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10 PetscCall(VecNorm(x0,NORM_2,&nrm));
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10 PetscCall(DSRestoreMat(ds,DS_MAT_X,&X));
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10 PetscCall(VecDestroy(&x0));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Norm of 1st vector = %.3f\n",(double)nrm));
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10 if (verbose) {
120 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After vectors - - - - - - - - -\n"));
121 PetscCall(DSView(ds,viewer));
122 }
123
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10 PetscCall(PetscFree2(wr,wi));
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10 PetscCall(DSDestroy(&ds));
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10 PetscCall(SlepcFinalize());
127 return 0;
128 }
129
130 /*TEST
131
132 test:
133 suffix: 1
134 requires: !single
135
136 TEST*/
137