GCC Code Coverage Report

Directory: ./
File: src/nep/tests/test14.c
Date: 2025-11-19 04:19:03
Exec Total Coverage
Lines: 49 53 92.5%
Functions: 2 2 100.0%
Branches: 146 246 59.3%
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[] = "Tests a user-defined convergence test in NEP.\n\n"
12 "The command line options are:\n"
13 " -n <n>, where <n> = matrix dimension.\n";
14
15 /*
16 Solve T(lambda)x=0 with T(lambda) = -D+sqrt(lambda)*I
17 where D is the Laplacian operator in 1 dimension
18 */
19
20 #include <slepcnep.h>
21
22 /*
23 MyConvergedRel - Convergence test relative to the norm of D (given in ctx).
24 */
25 70 PetscErrorCode MyConvergedRel(NEP nep,PetscScalar eigr,PetscScalar eigi,PetscReal res,PetscReal *errest,void *ctx)
26 {
27 70 PetscReal norm = *(PetscReal*)ctx;
28
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 70 PetscFunctionBegin;
30 70 *errest = res/norm;
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 70 PetscFunctionReturn(PETSC_SUCCESS);
32 }
33
34 10 int main(int argc,char **argv)
35 {
36 10 NEP nep; /* nonlinear eigensolver context */
37 10 Mat A[2];
38 10 PetscInt n=100,Istart,Iend,i;
39 10 PetscBool terse;
40 10 PetscReal norm;
41 10 FN f[2];
42 10 PetscScalar coeffs;
43
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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,"-n",&n,NULL));
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 10 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nSquare root eigenproblem, n=%" PetscInt_FMT "\n\n",n));
48
49 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
50 Create nonlinear eigensolver, define problem in split form
51 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
52
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 10 PetscCall(NEPCreate(PETSC_COMM_WORLD,&nep));
54
55 /* Create matrices */
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 10 PetscCall(MatCreate(PETSC_COMM_WORLD,&A[0]));
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 10 PetscCall(MatSetSizes(A[0],PETSC_DECIDE,PETSC_DECIDE,n,n));
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 10 PetscCall(MatSetFromOptions(A[0]));
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 10 PetscCall(MatGetOwnershipRange(A[0],&Istart,&Iend));
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 1010 for (i=Istart;i<Iend;i++) {
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 1000 if (i>0) PetscCall(MatSetValue(A[0],i,i-1,1.0,INSERT_VALUES));
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 1000 if (i<n-1) PetscCall(MatSetValue(A[0],i,i+1,1.0,INSERT_VALUES));
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 1000 PetscCall(MatSetValue(A[0],i,i,-2.0,INSERT_VALUES));
64 }
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 10 PetscCall(MatAssemblyBegin(A[0],MAT_FINAL_ASSEMBLY));
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 10 PetscCall(MatAssemblyEnd(A[0],MAT_FINAL_ASSEMBLY));
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 10 PetscCall(MatCreateConstantDiagonal(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,n,n,1.0,&A[1]));
69
70 /* Define functions */
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 10 PetscCall(FNCreate(PETSC_COMM_WORLD,&f[0]));
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 10 PetscCall(FNSetType(f[0],FNRATIONAL));
73 10 coeffs = 1.0;
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 10 PetscCall(FNRationalSetNumerator(f[0],1,&coeffs));
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 10 PetscCall(FNCreate(PETSC_COMM_WORLD,&f[1]));
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 10 PetscCall(FNSetType(f[1],FNSQRT));
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 10 PetscCall(NEPSetSplitOperator(nep,2,A,f,SUBSET_NONZERO_PATTERN));
78
79 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
80 Set some options and solve
81 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
82
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 10 PetscCall(NEPSetTarget(nep,1.1));
84
85 /* setup convergence test relative to the norm of D */
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 10 PetscCall(MatNorm(A[0],NORM_1,&norm));
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 10 PetscCall(NEPSetConvergenceTestFunction(nep,MyConvergedRel,&norm,NULL));
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 10 PetscCall(NEPSetFromOptions(nep));
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 10 PetscCall(NEPSolve(nep));
91
92 /* show detailed info unless -terse option is given by user */
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 10 PetscCall(PetscOptionsHasName(NULL,NULL,"-terse",&terse));
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 10 if (terse) PetscCall(NEPErrorView(nep,NEP_ERROR_BACKWARD,NULL));
95 else {
96 ✗ PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO_DETAIL));
97 ✗ PetscCall(NEPConvergedReasonView(nep,PETSC_VIEWER_STDOUT_WORLD));
98 ✗ PetscCall(NEPErrorView(nep,NEP_ERROR_BACKWARD,PETSC_VIEWER_STDOUT_WORLD));
99 ✗ PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD));
100 }
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 10 PetscCall(NEPDestroy(&nep));
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 10 PetscCall(MatDestroy(&A[0]));
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 10 PetscCall(MatDestroy(&A[1]));
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 10 PetscCall(FNDestroy(&f[0]));
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 10 PetscCall(FNDestroy(&f[1]));
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 10 PetscCall(SlepcFinalize());
107 return 0;
108 }
109
110 /*TEST
111
112 test:
113 suffix: 1
114 args: -nep_type slp -nep_nev 2 -terse
115
116 TEST*/
117