GCC Code Coverage Report


Directory: ./
File: src/sys/classes/ds/tests/test22.c
Date: 2025-10-04 04:19:13
Exec Total Coverage
Lines: 116 121 95.9%
Functions: 1 1 100.0%
Branches: 327 536 61.0%

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 DSGSVD with compact storage.\n\n";
12
13 #include <slepcds.h>
14
15 30 int main(int argc,char **argv)
16 {
17 30 DS ds;
18 30 Mat X;
19 30 Vec x0;
20 30 SlepcSC sc;
21 30 PetscReal *T,*D,sigma,rnorm,aux,cond;
22 30 PetscScalar *U,*V,*w,d;
23 30 PetscInt i,n=10,l=0,k=0,ld;
24 30 PetscViewer viewer;
25 30 PetscBool verbose,test_dsview,extrarow;
26
27
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30 PetscFunctionBeginUser;
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30 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
29
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30 PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
30
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30 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Solve a Dense System of type GSVD with compact storage - dimension %" PetscInt_FMT "x%" PetscInt_FMT ".\n",n,n));
31
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30 PetscCall(PetscOptionsGetInt(NULL,NULL,"-l",&l,NULL));
32
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30 PetscCall(PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL));
33
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30 PetscCheck(l<=n && k<=n && l<=k,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Wrong value of dimensions");
34
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30 PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
35
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30 PetscCall(PetscOptionsHasName(NULL,NULL,"-test_dsview",&test_dsview));
36
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30 PetscCall(PetscOptionsHasName(NULL,NULL,"-extrarow",&extrarow));
37
38 /* Create DS object */
39
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30 PetscCall(DSCreate(PETSC_COMM_WORLD,&ds));
40
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30 PetscCall(DSSetType(ds,DSGSVD));
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30 PetscCall(DSSetFromOptions(ds));
42 30 ld = n+2; /* test leading dimension larger than n */
43
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30 PetscCall(DSAllocate(ds,ld));
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30 PetscCall(DSSetDimensions(ds,n,l,k));
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30 PetscCall(DSGSVDSetDimensions(ds,n,PETSC_DECIDE));
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30 PetscCall(DSSetCompact(ds,PETSC_TRUE));
47
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30 PetscCall(DSSetExtraRow(ds,extrarow));
48
49 /* Set up viewer */
50
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30 PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&viewer));
51
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30 PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO_DETAIL));
52
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30 PetscCall(DSView(ds,viewer));
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30 PetscCall(PetscViewerPopFormat(viewer));
54
55
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30 if (test_dsview) {
56 /* Fill A and B with dummy values to test DSView */
57
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10 PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T));
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10 PetscCall(DSGetArrayReal(ds,DS_MAT_D,&D));
59
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110 for (i=0;i<n;i++) { T[i] = i+1; D[i] = -i-1; }
60
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100 for (i=0;i<n-1;i++) { T[i+ld] = -1.0; T[i+2*ld] = 1.0; }
61
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10 PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T));
62
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10 PetscCall(DSRestoreArrayReal(ds,DS_MAT_D,&D));
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10 PetscCall(DSView(ds,viewer));
64 }
65
66 /* Fill A and B with upper arrow-bidiagonal matrices
67 verifying that [A;B] has orthonormal columns */
68
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30 PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T));
69
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30 PetscCall(DSGetArrayReal(ds,DS_MAT_D,&D));
70
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330 for (i=0;i<n;i++) T[i] = (PetscReal)(i+1)/(n+1); /* diagonal of matrix A */
71
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110 for (i=0;i<k;i++) D[i] = PetscSqrtReal(1.0-T[i]*T[i]);
72
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90 for (i=l;i<k;i++) {
73 60 T[i+ld] = PetscSqrtReal((1.0-T[k]*T[k])/(1.0+T[i]*T[i]/(D[i]*D[i])))*0.5*(1.0/k); /* upper diagonal of matrix A */
74 60 T[i+2*ld] = -T[i+ld]*T[i]/D[i]; /* upper diagonal of matrix B */
75 }
76 30 aux = 1.0-T[k]*T[k];
77
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90 for (i=l;i<k;i++) aux -= T[i+ld]*T[i+ld]+T[i+2*ld]*T[i+2*ld];
78 30 D[k] = PetscSqrtReal(aux);
79
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220 for (i=k;i<n-1;i++) {
80 190 T[i+ld] = PetscSqrtReal((1.0-T[i+1]*T[i+1])/(1.0+T[i]*T[i]/(D[i]*D[i])))*0.5; /* upper diagonal of matrix A */
81 190 T[i+2*ld] = -T[i+ld]*T[i]/D[i]; /* upper diagonal of matrix B */
82 190 D[i+1] = PetscSqrtReal(1.0-T[i+1]*T[i+1]-T[ld+i]*T[ld+i]-T[2*ld+i]*T[2*ld+i]); /* diagonal of matrix B */
83 }
84
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30 if (extrarow) { T[n-1+ld]=-1.0; T[n-1+2*ld]=1.0; }
85 /* Fill locked eigenvalues */
86
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30 PetscCall(PetscMalloc1(n,&w));
87
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50 for (i=0;i<l;i++) w[i] = T[i]/D[i];
88
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30 PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T));
89
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30 PetscCall(DSRestoreArrayReal(ds,DS_MAT_D,&D));
90
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30 if (l==0 && k==0) PetscCall(DSSetState(ds,DS_STATE_INTERMEDIATE));
91
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20 else PetscCall(DSSetState(ds,DS_STATE_RAW));
92
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30 if (verbose) {
93 PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_MATLAB));
94 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Initial - - - - - - - - -\n"));
95 PetscCall(DSView(ds,viewer));
96 }
97
98 /* Condition number */
99
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30 PetscCall(DSCond(ds,&cond));
100
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30 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Condition number = %.3f\n",(double)cond));
101
102 /* Solve */
103
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30 PetscCall(DSGetSlepcSC(ds,&sc));
104 30 sc->comparison = SlepcCompareLargestReal;
105 30 sc->comparisonctx = NULL;
106 30 sc->map = NULL;
107 30 sc->mapobj = NULL;
108
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30 PetscCall(DSSolve(ds,w,NULL));
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30 PetscCall(DSSort(ds,w,NULL,NULL,NULL,NULL));
110
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30 if (extrarow) PetscCall(DSUpdateExtraRow(ds));
111
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30 PetscCall(DSSynchronize(ds,w,NULL));
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30 if (verbose) {
113 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After solve - - - - - - - - -\n"));
114 PetscCall(DSView(ds,viewer));
115 }
116
117 /* Print singular values */
118
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30 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Computed singular values =\n"));
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330 for (i=0;i<n;i++) {
120 300 sigma = PetscRealPart(w[i]);
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300 PetscCall(PetscViewerASCIIPrintf(viewer," %.5f\n",(double)sigma));
122 }
123
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30 if (extrarow) {
125 /* Check that extra row is correct */
126
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10 PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T));
127
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10 PetscCall(DSGetArray(ds,DS_MAT_U,&U));
128
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10 PetscCall(DSGetArray(ds,DS_MAT_V,&V));
129 d = 0.0;
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110 for (i=0;i<n;i++) d += T[i+ld]+U[n-1+i*ld];
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10 if (PetscAbsScalar(d)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: there is a mismatch in A's extra row of %g\n",(double)PetscAbsScalar(d)));
132 10 d = 0.0;
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110 for (i=0;i<n;i++) d += T[i+2*ld]-V[n-1+i*ld];
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10 if (PetscAbsScalar(d)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: there is a mismatch in B's extra row of %g\n",(double)PetscAbsScalar(d)));
135
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10 PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T));
136
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10 PetscCall(DSRestoreArray(ds,DS_MAT_U,&U));
137
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10 PetscCall(DSRestoreArray(ds,DS_MAT_V,&V));
138 }
139
140 /* Singular vectors */
141
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30 PetscCall(DSVectors(ds,DS_MAT_X,NULL,NULL)); /* all singular vectors */
142
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30 PetscCall(DSGetMat(ds,DS_MAT_X,&X));
143
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30 PetscCall(MatCreateVecs(X,NULL,&x0));
144
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30 PetscCall(MatGetColumnVector(X,x0,0));
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30 PetscCall(VecNorm(x0,NORM_2,&rnorm));
146
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30 PetscCall(DSRestoreMat(ds,DS_MAT_X,&X));
147
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30 PetscCall(VecDestroy(&x0));
148
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30 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Norm of 1st X vector = %.3f\n",(double)rnorm));
149
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30 PetscCall(DSGetMat(ds,DS_MAT_U,&X));
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30 PetscCall(MatCreateVecs(X,NULL,&x0));
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30 PetscCall(MatGetColumnVector(X,x0,0));
153
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30 PetscCall(VecNorm(x0,NORM_2,&rnorm));
154
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30 PetscCall(DSRestoreMat(ds,DS_MAT_U,&X));
155
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30 PetscCall(VecDestroy(&x0));
156
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30 if (PetscAbs(rnorm-1.0)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: the 1st U vector has norm %g\n",(double)rnorm));
157
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30 PetscCall(DSGetMat(ds,DS_MAT_V,&X));
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30 PetscCall(MatCreateVecs(X,NULL,&x0));
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30 PetscCall(MatGetColumnVector(X,x0,0));
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30 PetscCall(VecNorm(x0,NORM_2,&rnorm));
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30 PetscCall(DSRestoreMat(ds,DS_MAT_V,&X));
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30 PetscCall(VecDestroy(&x0));
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30 if (PetscAbs(rnorm-1.0)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: the 1st V vector has norm %g\n",(double)rnorm));
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30 PetscCall(PetscFree(w));
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30 PetscCall(DSDestroy(&ds));
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30 PetscCall(SlepcFinalize());
169 return 0;
170 }
171
172 /*TEST
173
174 testset:
175 requires: double
176 test:
177 suffix: 1
178 args: -test_dsview
179 test:
180 suffix: 2
181 args: -l 1 -k 4
182 test:
183 suffix: 2_extrarow
184 filter: sed -e "s/extrarow//"
185 args: -l 1 -k 4 -extrarow
186 output_file: output/test22_2.out
187
188 TEST*/
189