GCC Code Coverage Report


Directory: ./
File: src/eps/tests/test21.c
Date: 2025-10-04 04:19:13
Exec Total Coverage
Lines: 85 85 100.0%
Functions: 2 2 100.0%
Branches: 228 346 65.9%

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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[] = "Illustrates region filtering.\n\n"
12 "Based on ex5.\n"
13 "The command line options are:\n"
14 " -m <m>, where <m> = number of grid subdivisions in each dimension.\n\n";
15
16 #include <slepceps.h>
17
18 /*
19 User-defined routines
20 */
21 PetscErrorCode MatMarkovModel(PetscInt m,Mat A);
22
23 10 int main(int argc,char **argv)
24 {
25 10 Mat A;
26 10 EPS eps;
27 10 ST st;
28 10 RG rg;
29 10 PetscReal radius,tol=PETSC_SMALL;
30 10 PetscScalar target=0.5,kr,ki;
31 10 PetscInt N,m=15,nev,i,nconv;
32 10 PetscBool checkfile;
33 10 char filename[PETSC_MAX_PATH_LEN];
34 10 PetscViewer viewer;
35 10 char str[50];
36
37
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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,"-m",&m,NULL));
40 10 N = m*(m+1)/2;
41
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nMarkov Model, N=%" PetscInt_FMT " (m=%" PetscInt_FMT ")\n",N,m));
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10 PetscCall(PetscOptionsGetScalar(NULL,NULL,"-target",&target,NULL));
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10 PetscCall(SlepcSNPrintfScalar(str,sizeof(str),target,PETSC_FALSE));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Searching closest eigenvalues to the right of %s.\n\n",str));
45
46 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
47 Compute the operator matrix that defines the eigensystem, Ax=kx
48 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
49
50
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10 PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
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10 PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,N));
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10 PetscCall(MatSetFromOptions(A));
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10 PetscCall(MatMarkovModel(m,A));
54
55 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
56 Create a standalone spectral transformation
57 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
58
59
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10 PetscCall(STCreate(PETSC_COMM_WORLD,&st));
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10 PetscCall(STSetType(st,STSINVERT));
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10 PetscCall(STSetShift(st,target));
62
63 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
64 Create a region for filtering
65 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
66
67
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10 PetscCall(RGCreate(PETSC_COMM_WORLD,&rg));
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10 PetscCall(RGSetType(rg,RGELLIPSE));
69 10 radius = (1.0-PetscRealPart(target))/2.0;
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10 PetscCall(RGEllipseSetParameters(rg,target+radius,radius,0.1));
71
72 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
73 Create the eigensolver and set various options
74 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
75
76
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10 PetscCall(EPSCreate(PETSC_COMM_WORLD,&eps));
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10 PetscCall(EPSSetST(eps,st));
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10 PetscCall(EPSSetRG(eps,rg));
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10 PetscCall(EPSSetOperators(eps,A,NULL));
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10 PetscCall(EPSSetProblemType(eps,EPS_NHEP));
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10 PetscCall(EPSSetTolerances(eps,tol,PETSC_CURRENT));
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10 PetscCall(EPSSetTarget(eps,target));
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10 PetscCall(EPSSetFromOptions(eps));
84
85 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
86 Solve the eigensystem and display solution
87 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
88
89
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10 PetscCall(EPSSolve(eps));
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10 PetscCall(EPSGetDimensions(eps,&nev,NULL,NULL));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Number of requested eigenvalues: %" PetscInt_FMT "\n",nev));
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10 PetscCall(EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL));
93
94 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
95 Check file containing the eigenvalues
96 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
97
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10 PetscCall(PetscOptionsGetString(NULL,NULL,"-checkfile",filename,sizeof(filename),&checkfile));
98
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10 if (checkfile) {
99 #if defined(PETSC_HAVE_COMPLEX)
100 10 PetscComplex *eigs,eval;
101
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10 PetscCall(EPSGetConverged(eps,&nconv));
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10 PetscCall(PetscMalloc1(nconv,&eigs));
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10 PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer));
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10 PetscCall(PetscViewerBinaryRead(viewer,eigs,nconv,NULL,PETSC_COMPLEX));
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10 PetscCall(PetscViewerDestroy(&viewer));
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50 for (i=0;i<nconv;i++) {
108
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40 PetscCall(EPSGetEigenpair(eps,i,&kr,&ki,NULL,NULL));
109 #if defined(PETSC_USE_COMPLEX)
110 20 eval = kr;
111 #else
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20 eval = PetscCMPLX(kr,ki);
113 #endif
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40 PetscCheck(eval==eigs[i],PETSC_COMM_WORLD,PETSC_ERR_FILE_UNEXPECTED,"Eigenvalues in the file do not match");
115 }
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10 PetscCall(PetscFree(eigs));
117 #else
118 SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP,"The -checkfile option requires C99 complex numbers");
119 #endif
120 }
121
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10 PetscCall(EPSDestroy(&eps));
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10 PetscCall(STDestroy(&st));
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10 PetscCall(RGDestroy(&rg));
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10 PetscCall(MatDestroy(&A));
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10 PetscCall(SlepcFinalize());
127 return 0;
128 }
129
130 10 PetscErrorCode MatMarkovModel(PetscInt m,Mat A)
131 {
132 10 const PetscReal cst = 0.5/(PetscReal)(m-1);
133 10 PetscReal pd,pu;
134 10 PetscInt Istart,Iend,i,j,jmax,ix=0;
135
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10 PetscFunctionBeginUser;
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10 PetscCall(MatGetOwnershipRange(A,&Istart,&Iend));
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160 for (i=1;i<=m;i++) {
139 150 jmax = m-i+1;
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1350 for (j=1;j<=jmax;j++) {
141 1200 ix = ix + 1;
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1200 if (ix-1<Istart || ix>Iend) continue; /* compute only owned rows */
143
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1200 if (j!=jmax) {
144 1050 pd = cst*(PetscReal)(i+j-1);
145 /* north */
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1050 if (i==1) PetscCall(MatSetValue(A,ix-1,ix,2*pd,INSERT_VALUES));
147
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910 else PetscCall(MatSetValue(A,ix-1,ix,pd,INSERT_VALUES));
148 /* east */
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1050 if (j==1) PetscCall(MatSetValue(A,ix-1,ix+jmax-1,2*pd,INSERT_VALUES));
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910 else PetscCall(MatSetValue(A,ix-1,ix+jmax-1,pd,INSERT_VALUES));
151 }
152 /* south */
153 1200 pu = 0.5 - cst*(PetscReal)(i+j-3);
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1200 if (j>1) PetscCall(MatSetValue(A,ix-1,ix-2,pu,INSERT_VALUES));
155 /* west */
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1200 if (i>1) PetscCall(MatSetValue(A,ix-1,ix-jmax-2,pu,INSERT_VALUES));
157 }
158 }
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10 PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY));
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10 PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY));
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2 PetscFunctionReturn(PETSC_SUCCESS);
162 }
163
164 /*TEST
165
166 test:
167 suffix: 1
168 args: -eps_nev 4 -eps_ncv 20 -eps_view_values binary:myvalues.bin -checkfile myvalues.bin
169 output_file: output/test11_1.out
170 requires: !single c99_complex
171
172 TEST*/
173