GCC Code Coverage Report

Directory: ./
File: src/eps/tests/test20.c
Date: 2025-11-19 04:19:03
Exec Total Coverage
Lines: 36 36 100.0%
Functions: 1 1 100.0%
Branches: 122 182 67.0%
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[] = "Tests multiple calls to EPSSolve changing ncv.\n\n";
12
13 #include <slepceps.h>
14
15 80 int main(int argc,char **argv)
16 {
17 80 Mat A;
18 80 EPS eps;
19 80 PetscReal tol=PetscMax(1000*PETSC_MACHINE_EPSILON,1e-9);
20 80 PetscInt n=30,i,Istart,Iend,nev,ncv;
21
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 80 PetscFunctionBeginUser;
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 80 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
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 80 PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
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 80 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\n1-D Laplacian Eigenproblem, n=%" PetscInt_FMT "\n\n",n));
26
27 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
28 Compute the operator matrix that defines the eigensystem, Ax=kx
29 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
30
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 80 PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
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 80 PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,n,n));
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 80 PetscCall(MatSetFromOptions(A));
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 80 PetscCall(MatGetOwnershipRange(A,&Istart,&Iend));
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 1520 for (i=Istart;i<Iend;i++) {
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 1440 if (i>0) PetscCall(MatSetValue(A,i,i-1,-1.0,INSERT_VALUES));
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 1440 if (i<n-1) PetscCall(MatSetValue(A,i,i+1,-1.0,INSERT_VALUES));
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 1440 PetscCall(MatSetValue(A,i,i,2.0,INSERT_VALUES));
39 }
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 80 PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY));
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 80 PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY));
42
43 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
44 Create the solver, call EPSSolve() twice
45 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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 80 PetscCall(EPSCreate(PETSC_COMM_WORLD,&eps));
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 80 PetscCall(EPSSetOperators(eps,A,NULL));
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 80 PetscCall(EPSSetProblemType(eps,EPS_HEP));
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 80 PetscCall(EPSSetTolerances(eps,tol,PETSC_CURRENT));
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 80 PetscCall(EPSSetWhichEigenpairs(eps,EPS_SMALLEST_REAL));
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 80 PetscCall(EPSSetFromOptions(eps));
52
53 /* First solve */
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 80 PetscCall(EPSSolve(eps));
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 80 PetscCall(PetscPrintf(PETSC_COMM_WORLD," - - - First solve, default subspace dimension - - -\n"));
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 80 PetscCall(EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL));
57
58 /* Second solve */
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 80 PetscCall(EPSGetDimensions(eps,&nev,&ncv,NULL));
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 80 PetscCall(EPSSetDimensions(eps,nev,ncv+2,PETSC_DETERMINE));
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 80 PetscCall(EPSSolve(eps));
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 80 PetscCall(PetscPrintf(PETSC_COMM_WORLD," - - - Second solve, subspace of increased size - - -\n"));
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 80 PetscCall(EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL));
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 80 PetscCall(EPSDestroy(&eps));
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 80 PetscCall(MatDestroy(&A));
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 80 PetscCall(SlepcFinalize());
68 return 0;
69 }
70
71 /*TEST
72
73 test:
74 suffix: 1
75 args: -n 18 -eps_type {{krylovschur arnoldi gd jd rqcg lobpcg lapack}} -eps_max_it 1500
76 output_file: output/test20_1.out
77
78 test:
79 suffix: 1_lanczos
80 args: -n 18 -eps_type lanczos -eps_lanczos_reorthog full -eps_max_it 1500
81 output_file: output/test20_1.out
82
83 TEST*/
84