GCC Code Coverage Report


Directory: ./
File: src/pep/tests/test8.c
Date: 2025-10-04 04:19:13
Exec Total Coverage
Lines: 82 82 100.0%
Functions: 1 1 100.0%
Branches: 288 424 67.9%

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 interface functions of polynomial JD.\n\n"
12 "This is based on ex16.c. The command line options are:\n"
13 " -n <n>, where <n> = number of grid subdivisions in x dimension.\n"
14 " -m <m>, where <m> = number of grid subdivisions in y dimension.\n\n";
15
16 #include <slepcpep.h>
17
18 10 int main(int argc,char **argv)
19 {
20 10 Mat M,C,K,A[3]; /* problem matrices */
21 10 PEP pep; /* polynomial eigenproblem solver context */
22 10 PetscInt N,n=10,m,Istart,Iend,II,i,j,midx;
23 10 PetscReal restart,fix;
24 10 PetscBool flag,reuse;
25 10 PEPJDProjection proj;
26
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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(PetscOptionsGetInt(NULL,NULL,"-m",&m,&flag));
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10 if (!flag) m=n;
33 10 N = n*m;
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nQuadratic Eigenproblem, N=%" PetscInt_FMT " (%" PetscInt_FMT "x%" PetscInt_FMT " grid)\n\n",N,n,m));
35
36 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
37 Compute the matrices that define the eigensystem, (k^2*M+k*C+K)x=0
38 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
39
40 /* K is the 2-D Laplacian */
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10 PetscCall(MatCreate(PETSC_COMM_WORLD,&K));
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10 PetscCall(MatSetSizes(K,PETSC_DECIDE,PETSC_DECIDE,N,N));
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10 PetscCall(MatSetFromOptions(K));
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10 PetscCall(MatGetOwnershipRange(K,&Istart,&Iend));
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1450 for (II=Istart;II<Iend;II++) {
46 1440 i = II/n; j = II-i*n;
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1440 if (i>0) PetscCall(MatSetValue(K,II,II-n,-1.0,INSERT_VALUES));
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1440 if (i<m-1) PetscCall(MatSetValue(K,II,II+n,-1.0,INSERT_VALUES));
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1440 if (j>0) PetscCall(MatSetValue(K,II,II-1,-1.0,INSERT_VALUES));
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1440 if (j<n-1) PetscCall(MatSetValue(K,II,II+1,-1.0,INSERT_VALUES));
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1440 PetscCall(MatSetValue(K,II,II,4.0,INSERT_VALUES));
52 }
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10 PetscCall(MatAssemblyBegin(K,MAT_FINAL_ASSEMBLY));
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10 PetscCall(MatAssemblyEnd(K,MAT_FINAL_ASSEMBLY));
55
56 /* C is the 1-D Laplacian on horizontal lines */
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10 PetscCall(MatCreate(PETSC_COMM_WORLD,&C));
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10 PetscCall(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,N,N));
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10 PetscCall(MatSetFromOptions(C));
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10 PetscCall(MatGetOwnershipRange(C,&Istart,&Iend));
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1450 for (II=Istart;II<Iend;II++) {
62 1440 i = II/n; j = II-i*n;
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1440 if (j>0) PetscCall(MatSetValue(C,II,II-1,-1.0,INSERT_VALUES));
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1440 if (j<n-1) PetscCall(MatSetValue(C,II,II+1,-1.0,INSERT_VALUES));
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1440 PetscCall(MatSetValue(C,II,II,2.0,INSERT_VALUES));
66 }
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10 PetscCall(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY));
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10 PetscCall(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY));
69
70 /* M is a diagonal matrix */
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10 PetscCall(MatCreate(PETSC_COMM_WORLD,&M));
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10 PetscCall(MatSetSizes(M,PETSC_DECIDE,PETSC_DECIDE,N,N));
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10 PetscCall(MatSetFromOptions(M));
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10 PetscCall(MatGetOwnershipRange(M,&Istart,&Iend));
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1450 for (II=Istart;II<Iend;II++) PetscCall(MatSetValue(M,II,II,(PetscReal)(II+1),INSERT_VALUES));
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10 PetscCall(MatAssemblyBegin(M,MAT_FINAL_ASSEMBLY));
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10 PetscCall(MatAssemblyEnd(M,MAT_FINAL_ASSEMBLY));
78
79 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
80 Create the eigensolver and set various options
81 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
82
83
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10 PetscCall(PEPCreate(PETSC_COMM_WORLD,&pep));
84 10 A[0] = K; A[1] = C; A[2] = M;
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10 PetscCall(PEPSetOperators(pep,3,A));
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10 PetscCall(PEPSetType(pep,PEPJD));
87
88 /*
89 Test interface functions of JD solver
90 */
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10 PetscCall(PEPJDGetRestart(pep,&restart));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Restart parameter before changing = %g",(double)restart));
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10 PetscCall(PEPJDSetRestart(pep,0.3));
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10 PetscCall(PEPJDGetRestart(pep,&restart));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," ... changed to %g\n",(double)restart));
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10 PetscCall(PEPJDGetFix(pep,&fix));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Fix parameter before changing = %g",(double)fix));
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10 PetscCall(PEPJDSetFix(pep,0.001));
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10 PetscCall(PEPJDGetFix(pep,&fix));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," ... changed to %g\n",(double)fix));
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10 PetscCall(PEPJDGetReusePreconditioner(pep,&reuse));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Reuse preconditioner flag before changing = %d",(int)reuse));
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10 PetscCall(PEPJDSetReusePreconditioner(pep,PETSC_TRUE));
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10 PetscCall(PEPJDGetReusePreconditioner(pep,&reuse));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," ... changed to %d\n",(int)reuse));
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10 PetscCall(PEPJDGetProjection(pep,&proj));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Projection type before changing = %d",(int)proj));
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10 PetscCall(PEPJDSetProjection(pep,PEP_JD_PROJECTION_ORTHOGONAL));
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10 PetscCall(PEPJDGetProjection(pep,&proj));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," ... changed to %d\n",(int)proj));
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10 PetscCall(PEPJDGetMinimalityIndex(pep,&midx));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Minimality index before changing = %" PetscInt_FMT,midx));
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10 PetscCall(PEPJDSetMinimalityIndex(pep,2));
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10 PetscCall(PEPJDGetMinimalityIndex(pep,&midx));
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10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," ... changed to %" PetscInt_FMT "\n",midx));
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10 PetscCall(PEPSetFromOptions(pep));
122
123 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
124 Solve the eigensystem
125 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
126
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10 PetscCall(PEPSolve(pep));
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10 PetscCall(PEPErrorView(pep,PEP_ERROR_BACKWARD,NULL));
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10 PetscCall(PEPDestroy(&pep));
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10 PetscCall(MatDestroy(&M));
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10 PetscCall(MatDestroy(&C));
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10 PetscCall(MatDestroy(&K));
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10 PetscCall(SlepcFinalize());
134 return 0;
135 }
136
137 /*TEST
138
139 test:
140 args: -n 12 -pep_nev 2 -pep_ncv 21 -pep_conv_abs
141
142 TEST*/
143