GCC Code Coverage Report

Directory: ./
File: src/sys/classes/ds/tests/test5.c
Date: 2026-02-22 03:58:10
Exec Total Coverage
Lines: 68 72 94.4%
Functions: 1 1 100.0%
Branches: 167 280 59.6%
Line Branch Exec Source
1 /*
2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3 SLEPc - Scalable Library for Eigenvalue Problem Computations
4 Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
5
6 This file is part of SLEPc.
7 SLEPc is distributed under a 2-clause BSD license (see LICENSE).
8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9 */
10
11 static char help[] = "Test DSGHIEP.\n\n";
12
13 #include <slepcds.h>
14
15 48 int main(int argc,char **argv)
16 {
17 48 DS ds;
18 48 SlepcSC sc;
19 48 PetscReal re,im;
20 48 PetscScalar *A,*B,*Q,*eigr,*eigi,d;
21 48 PetscInt i,j,n=10,ld;
22 48 PetscViewer viewer;
23 48 PetscBool verbose,extrarow;
24
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 48 PetscFunctionBeginUser;
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 48 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
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 48 PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
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 48 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Solve a Dense System of type GHIEP - dimension %" PetscInt_FMT ".\n",n));
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 48 PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
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 48 PetscCall(PetscOptionsHasName(NULL,NULL,"-extrarow",&extrarow));
31
32 /* Create DS object */
33
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 48 PetscCall(DSCreate(PETSC_COMM_WORLD,&ds));
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 48 PetscCall(DSSetType(ds,DSGHIEP));
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 48 PetscCall(DSSetFromOptions(ds));
36 48 ld = n+2; /* test leading dimension larger than n */
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 48 PetscCall(DSAllocate(ds,ld));
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 48 PetscCall(DSSetDimensions(ds,n,0,0));
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 48 PetscCall(DSSetExtraRow(ds,extrarow));
40
41 /* Set up viewer */
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 48 PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&viewer));
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 48 PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO_DETAIL));
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 48 PetscCall(DSView(ds,viewer));
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 48 PetscCall(PetscViewerPopFormat(viewer));
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 48 if (verbose) PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_MATLAB));
47
48 /* Fill with a symmetric Toeplitz matrix */
49
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 48 PetscCall(DSGetArray(ds,DS_MAT_A,&A));
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 48 PetscCall(DSGetArray(ds,DS_MAT_B,&B));
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 528 for (i=0;i<n;i++) A[i+i*ld]=2.0;
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 144 for (j=1;j<3;j++) {
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 912 for (i=0;i<n-j;i++) { A[i+(i+j)*ld]=1.0; A[(i+j)+i*ld]=1.0; }
54 }
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 144 for (j=1;j<3;j++) { A[0+j*ld]=-1.0*(j+2); A[j+0*ld]=-1.0*(j+2); }
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 48 if (extrarow) A[n+(n-1)*ld]=-1.0;
57 /* Signature matrix */
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 528 for (i=0;i<n;i++) B[i+i*ld]=1.0;
59 48 B[0] = -1.0;
60 48 B[n-1+(n-1)*ld] = -1.0;
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 48 PetscCall(DSRestoreArray(ds,DS_MAT_A,&A));
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 48 PetscCall(DSRestoreArray(ds,DS_MAT_B,&B));
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 48 PetscCall(DSSetState(ds,DS_STATE_RAW));
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 48 if (verbose) {
65 ✗ PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Initial - - - - - - - - -\n"));
66 ✗ PetscCall(DSView(ds,viewer));
67 }
68
69 /* Solve */
70
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 48 PetscCall(PetscCalloc2(n,&eigr,n,&eigi));
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 48 PetscCall(DSGetSlepcSC(ds,&sc));
72 48 sc->comparison = SlepcCompareLargestMagnitude;
73 48 sc->comparisonctx = NULL;
74 48 sc->map = NULL;
75 48 sc->mapobj = NULL;
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 48 PetscCall(DSSolve(ds,eigr,eigi));
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 48 PetscCall(DSSort(ds,eigr,eigi,NULL,NULL,NULL));
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 48 if (extrarow) PetscCall(DSUpdateExtraRow(ds));
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 48 if (verbose) {
81 ✗ PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After solve - - - - - - - - -\n"));
82 ✗ PetscCall(DSView(ds,viewer));
83 }
84
85 /* Print eigenvalues */
86
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 48 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Computed eigenvalues =\n"));
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 528 for (i=0;i<n;i++) {
88 #if defined(PETSC_USE_COMPLEX)
89 240 re = PetscRealPart(eigr[i]);
90 240 im = PetscImaginaryPart(eigr[i]);
91 #else
92 240 re = eigr[i];
93 240 im = eigi[i];
94 #endif
95
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 480 if (PetscAbs(im)<1e-10) PetscCall(PetscViewerASCIIPrintf(viewer," %.5f\n",(double)re));
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 480 else PetscCall(PetscViewerASCIIPrintf(viewer," %.5f%+.5fi\n",(double)re,(double)im));
97 }
98
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 48 if (extrarow) {
100 /* Check that extra row is correct */
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 24 PetscCall(DSGetArray(ds,DS_MAT_A,&A));
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 24 PetscCall(DSGetArray(ds,DS_MAT_Q,&Q));
103 d = 0.0;
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 264 for (i=0;i<n;i++) d += A[n+i*ld]+Q[n-1+i*ld];
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 24 if (PetscAbsScalar(d)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: there is a mismatch in the extra row of %g\n",(double)PetscAbsScalar(d)));
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 24 PetscCall(DSRestoreArray(ds,DS_MAT_A,&A));
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 24 PetscCall(DSRestoreArray(ds,DS_MAT_Q,&Q));
108 }
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 48 PetscCall(PetscFree2(eigr,eigi));
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 48 PetscCall(DSDestroy(&ds));
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 48 PetscCall(SlepcFinalize());
112 return 0;
113 }
114
115 /*TEST
116
117 testset:
118 args: -ds_method {{0 1 2}}
119 filter: grep -v "solving the problem" | sed -e "s/extrarow//"
120 output_file: output/test5_1.out
121 requires: !single
122 test:
123 suffix: 1
124 test:
125 suffix: 2
126 args: -extrarow
127
128 TEST*/
129