GCC Code Coverage Report

Directory: ./
File: src/sys/classes/ds/tests/test26.c
Date: 2025-11-19 04:19:03
Exec Total Coverage
Lines: 76 78 97.4%
Functions: 1 1 100.0%
Branches: 229 358 64.0%
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 DSHSVD with compact storage.\n\n";
12
13 #include <slepcds.h>
14
15 40 int main(int argc,char **argv)
16 {
17 40 DS ds;
18 40 SlepcSC sc;
19 40 PetscReal *T,*D,sigma;
20 40 PetscScalar *U,*w,d;
21 40 PetscInt i,n=10,m,l=2,k=5,p=1,ld;
22 40 PetscViewer viewer;
23 40 PetscBool verbose,extrarow,reorthog,flg;
24
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 40 PetscFunctionBeginUser;
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 40 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
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 40 PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
28 40 m = n;
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 40 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Solve a Dense System of type HSVD with compact storage - dimension %" PetscInt_FMT "x%" PetscInt_FMT ".\n",n,m));
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 40 PetscCall(PetscOptionsGetInt(NULL,NULL,"-l",&l,NULL));
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 40 PetscCall(PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL));
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 40 PetscCall(PetscOptionsGetInt(NULL,NULL,"-p",&p,NULL));
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 40 PetscCheck(l<=n && k<=n && l<=k && p>=0 && p<=n-l,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Wrong value of dimensions");
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 40 PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
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 40 PetscCall(PetscOptionsHasName(NULL,NULL,"-extrarow",&extrarow));
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 40 PetscCall(PetscOptionsHasName(NULL,NULL,"-reorthog",&reorthog));
37
38 /* Create DS object */
39
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 40 PetscCall(DSCreate(PETSC_COMM_WORLD,&ds));
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 40 PetscCall(DSSetType(ds,DSHSVD));
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 40 PetscCall(DSSetFromOptions(ds));
42 40 ld = n+2; /* test leading dimension larger than n */
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 40 PetscCall(DSAllocate(ds,ld));
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 40 PetscCall(DSSetDimensions(ds,n,l,k));
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 40 PetscCall(DSHSVDSetDimensions(ds,m));
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 40 PetscCall(DSSetCompact(ds,PETSC_TRUE));
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 40 PetscCall(DSSetExtraRow(ds,extrarow));
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 40 PetscCall(DSHSVDSetReorthogonalize(ds,reorthog));
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 40 PetscCall(DSHSVDGetReorthogonalize(ds,&flg));
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 40 if (flg) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"reorthogonalizing\n"));
51
52 /* Set up viewer */
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 40 PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&viewer));
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 40 PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO_DETAIL));
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 40 PetscCall(DSView(ds,viewer));
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 40 PetscCall(PetscViewerPopFormat(viewer));
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 40 PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_MATLAB));
58
59 /* Fill upper arrow-bidiagonal matrix and signature matrix */
60
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 40 PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T));
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 440 for (i=0;i<n;i++) T[i] = (PetscReal)(i+1);
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 340 for (i=l;i<n-1;i++) T[i+ld] = 1.0;
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 40 if (extrarow) T[n-1+ld] = 1.0;
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 40 PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T));
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 40 PetscCall(DSGetArrayReal(ds,DS_MAT_D,&D));
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 440 for (i=0;i<n;i++) D[i] = (i>=l && i<l+p)? -1.0: 1.0;
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 40 PetscCall(DSRestoreArrayReal(ds,DS_MAT_D,&D));
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 40 if (l==0 && k==0) PetscCall(DSSetState(ds,DS_STATE_INTERMEDIATE));
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 30 else PetscCall(DSSetState(ds,DS_STATE_RAW));
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 40 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Initial - - - - - - - - -\n"));
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 40 PetscCall(DSView(ds,viewer));
72
73 /* Solve */
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 40 PetscCall(PetscMalloc1(n,&w));
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 40 PetscCall(DSGetSlepcSC(ds,&sc));
76 40 sc->comparison = SlepcCompareLargestReal;
77 40 sc->comparisonctx = NULL;
78 40 sc->map = NULL;
79 40 sc->mapobj = NULL;
80
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 40 PetscCall(DSSolve(ds,w,NULL));
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 40 PetscCall(DSSort(ds,w,NULL,NULL,NULL,NULL));
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 40 if (extrarow) PetscCall(DSUpdateExtraRow(ds));
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 40 if (verbose) {
84 ✗ PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After solve - - - - - - - - -\n"));
85 ✗ PetscCall(DSView(ds,viewer));
86 }
87
88 /* Print singular values */
89
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 40 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Computed singular values =\n"));
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 440 for (i=0;i<n;i++) {
91 400 sigma = PetscRealPart(w[i]);
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 400 PetscCall(PetscViewerASCIIPrintf(viewer," %.5f\n",(double)sigma));
93 }
94
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 40 if (extrarow) {
96 /* 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));
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 20 PetscCall(DSGetArrayReal(ds,DS_MAT_D,&D));
100 20 d = 0.0;
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 180 for (i=l;i<n;i++) d += T[i+ld]-D[i]*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));
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 20 PetscCall(DSRestoreArrayReal(ds,DS_MAT_D,&D));
106 }
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 40 PetscCall(PetscFree(w));
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 40 PetscCall(DSDestroy(&ds));
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 40 PetscCall(SlepcFinalize());
110 return 0;
111 }
112
113 /*TEST
114
115 test:
116 suffix: 1
117 requires: !single
118
119 test:
120 args: -l 0 -k 0
121 suffix: 2
122 requires: !single
123
124 test:
125 args: -extrarow -reorthog {{0 1}}
126 suffix: 3
127 requires: !single
128 filter: grep -v reorthogonalizing
129
130 TEST*/
131