GCC Code Coverage Report

Directory: ./
File: src/sys/classes/ds/tests/test8.c
Date: 2025-10-04 04:19:13
Exec Total Coverage
Lines: 66 68 97.1%
Functions: 1 1 100.0%
Branches: 183 292 62.7%
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 DSSVD with compact storage.\n\n";
12
13 #include <slepcds.h>
14
15 60 int main(int argc,char **argv)
16 {
17 60 DS ds;
18 60 SlepcSC sc;
19 60 PetscReal *T,sigma;
20 60 PetscScalar *U,*w,d;
21 60 PetscInt i,n=10,m,l=2,k=5,ld;
22 60 PetscViewer viewer;
23 60 PetscBool verbose,extrarow;
24
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 60 PetscFunctionBeginUser;
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 60 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
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 60 PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
28 60 m = n;
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 60 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Solve a Dense System of type SVD with compact storage - dimension %" PetscInt_FMT "x%" PetscInt_FMT ".\n",n,m));
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 60 PetscCall(PetscOptionsGetInt(NULL,NULL,"-l",&l,NULL));
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 60 PetscCall(PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL));
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 60 PetscCheck(l<=n && k<=n && l<=k,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Wrong value of dimensions");
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 60 PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
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 60 PetscCall(PetscOptionsHasName(NULL,NULL,"-extrarow",&extrarow));
35
36 /* Create DS object */
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 60 PetscCall(DSCreate(PETSC_COMM_WORLD,&ds));
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 60 PetscCall(DSSetType(ds,DSSVD));
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 60 PetscCall(DSSetFromOptions(ds));
40 60 ld = n+2; /* test leading dimension larger than n */
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 60 PetscCall(DSAllocate(ds,ld));
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 60 PetscCall(DSSetDimensions(ds,n,l,k));
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 60 PetscCall(DSSVDSetDimensions(ds,m));
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 60 PetscCall(DSSetCompact(ds,PETSC_TRUE));
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 60 PetscCall(DSSetExtraRow(ds,extrarow));
46
47 /* Set up viewer */
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 60 PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&viewer));
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 60 PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO_DETAIL));
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 60 PetscCall(DSView(ds,viewer));
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 60 PetscCall(PetscViewerPopFormat(viewer));
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 60 PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_MATLAB));
53
54 /* Fill upper arrow-bidiagonal matrix */
55
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 60 PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T));
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 660 for (i=0;i<n;i++) T[i] = (PetscReal)(i+1);
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 520 for (i=l;i<n-1;i++) T[i+ld] = 1.0;
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 60 if (extrarow) T[n-1+ld] = 1.0;
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 60 PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T));
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 60 if (l==0 && k==0) PetscCall(DSSetState(ds,DS_STATE_INTERMEDIATE));
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 40 else PetscCall(DSSetState(ds,DS_STATE_RAW));
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 60 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Initial - - - - - - - - -\n"));
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 60 PetscCall(DSView(ds,viewer));
64
65 /* Solve */
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 60 PetscCall(PetscMalloc1(n,&w));
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 60 PetscCall(DSGetSlepcSC(ds,&sc));
68 60 sc->comparison = SlepcCompareLargestReal;
69 60 sc->comparisonctx = NULL;
70 60 sc->map = NULL;
71 60 sc->mapobj = NULL;
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 60 PetscCall(DSSolve(ds,w,NULL));
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 60 PetscCall(DSSort(ds,w,NULL,NULL,NULL,NULL));
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 60 if (extrarow) PetscCall(DSUpdateExtraRow(ds));
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 60 if (verbose) {
76 ✗ PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After solve - - - - - - - - -\n"));
77 ✗ PetscCall(DSView(ds,viewer));
78 }
79
80 /* Print singular values */
81
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 60 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Computed singular values =\n"));
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 660 for (i=0;i<n;i++) {
83 600 sigma = PetscRealPart(w[i]);
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 600 PetscCall(PetscViewerASCIIPrintf(viewer," %.5f\n",(double)sigma));
85 }
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 60 if (extrarow) {
88 /* Check that extra row is correct */
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 20 PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T));
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 20 PetscCall(DSGetArray(ds,DS_MAT_U,&U));
91 20 d = 0.0;
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 180 for (i=l;i<n;i++) d += T[i+ld]-U[n-1+i*ld];
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 20 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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 20 PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T));
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 20 PetscCall(DSRestoreArray(ds,DS_MAT_U,&U));
96 }
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 60 PetscCall(PetscFree(w));
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 60 PetscCall(DSDestroy(&ds));
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 60 PetscCall(SlepcFinalize());
100 return 0;
101 }
102
103 /*TEST
104
105 test:
106 args: -ds_method {{0 1}}
107 suffix: 1
108 filter: grep -v "solving the problem"
109 requires: !single
110
111 test:
112 args: -l 0 -k 0 -ds_method {{0 1}}
113 suffix: 2
114 filter: grep -v "solving the problem"
115 requires: !single
116
117 test:
118 args: -extrarow -ds_method {{0 1}}
119 suffix: 3
120 filter: grep -v "solving the problem"
121 requires: !single
122
123 TEST*/
124