GCC Code Coverage Report

Directory: ./
File: src/eps/tests/test35.c
Date: 2025-11-19 04:19:03
Exec Total Coverage
Lines: 60 60 100.0%
Functions: 1 1 100.0%
Branches: 195 292 66.8%
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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[] = "Test interface to external package BLOPEX.\n\n"
12 "This is based on ex12.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 <slepceps.h>
17
18 6 int main(int argc,char **argv)
19 {
20 6 Mat A,B; /* matrices */
21 6 EPS eps; /* eigenproblem solver context */
22 6 ST st; /* spectral transformation context */
23 6 KSP ksp;
24 6 PC pc;
25 6 PetscInt N,n=35,m,Istart,Iend,II,i,j,bs;
26 6 PetscBool flag;
27
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 6 PetscFunctionBeginUser;
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 6 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
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 6 PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
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 6 PetscCall(PetscOptionsGetInt(NULL,NULL,"-m",&m,&flag));
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 6 if (!flag) m=n;
34 6 N = n*m;
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 6 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nGeneralized eigenproblem with BLOPEX, N=%" PetscInt_FMT " (%" PetscInt_FMT "x%" PetscInt_FMT " grid)\n\n",N,n,m));
36
37 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
38 Compute the matrices that define the eigensystem, Ax=kBx
39 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
40
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 6 PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
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 6 PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,N));
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 6 PetscCall(MatSetFromOptions(A));
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 6 PetscCall(MatCreate(PETSC_COMM_WORLD,&B));
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 6 PetscCall(MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,N,N));
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 6 PetscCall(MatSetFromOptions(B));
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 6 PetscCall(MatGetOwnershipRange(A,&Istart,&Iend));
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 7356 for (II=Istart;II<Iend;II++) {
51 7350 i = II/n; j = II-i*n;
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 7350 if (i>0) PetscCall(MatSetValue(A,II,II-n,-1.0,INSERT_VALUES));
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 7350 if (i<m-1) PetscCall(MatSetValue(A,II,II+n,-1.0,INSERT_VALUES));
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 7350 if (j>0) PetscCall(MatSetValue(A,II,II-1,-1.0,INSERT_VALUES));
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 7350 if (j<n-1) PetscCall(MatSetValue(A,II,II+1,-1.0,INSERT_VALUES));
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 7350 PetscCall(MatSetValue(A,II,II,4.0,INSERT_VALUES));
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 7350 PetscCall(MatSetValue(B,II,II,2.0,INSERT_VALUES));
58 }
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 6 if (Istart==0) {
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 6 PetscCall(MatSetValue(B,0,0,6.0,INSERT_VALUES));
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 6 PetscCall(MatSetValue(B,0,1,-1.0,INSERT_VALUES));
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 6 PetscCall(MatSetValue(B,1,0,-1.0,INSERT_VALUES));
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 6 PetscCall(MatSetValue(B,1,1,1.0,INSERT_VALUES));
64 }
65
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 6 PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY));
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 6 PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY));
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 6 PetscCall(MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY));
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 6 PetscCall(MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY));
70
71 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
72 Create the eigensolver and set various options
73 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
74
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 6 PetscCall(EPSCreate(PETSC_COMM_WORLD,&eps));
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 6 PetscCall(EPSSetOperators(eps,A,B));
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 6 PetscCall(EPSSetProblemType(eps,EPS_GHEP));
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 6 PetscCall(EPSSetType(eps,EPSBLOPEX));
79
80 /*
81 Set several options
82 */
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 6 PetscCall(EPSSetWhichEigenpairs(eps,EPS_SMALLEST_REAL));
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 6 PetscCall(EPSGetST(eps,&st));
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 6 PetscCall(STSetType(st,STPRECOND));
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 6 PetscCall(STGetKSP(st,&ksp));
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 6 PetscCall(KSPGetPC(ksp,&pc));
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 6 PetscCall(KSPSetType(ksp,KSPPREONLY));
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 6 PetscCall(PCSetType(pc,PCICC));
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 6 PetscCall(EPSBLOPEXSetBlockSize(eps,4));
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 6 PetscCall(EPSSetFromOptions(eps));
93
94 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
95 Compute all eigenvalues in interval and display info
96 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
97
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 6 PetscCall(EPSSolve(eps));
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 6 PetscCall(EPSBLOPEXGetBlockSize(eps,&bs));
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 6 PetscCall(PetscPrintf(PETSC_COMM_WORLD," BLOPEX: using block size %" PetscInt_FMT "\n",bs));
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 6 PetscCall(EPSErrorView(eps,EPS_ERROR_ABSOLUTE,NULL));
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 6 PetscCall(EPSDestroy(&eps));
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 6 PetscCall(MatDestroy(&A));
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 6 PetscCall(MatDestroy(&B));
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 6 PetscCall(SlepcFinalize());
108 return 0;
109 }
110
111 /*TEST
112
113 build:
114 requires: blopex
115
116 test:
117 suffix: 1
118 args: -eps_nev 8 -eps_view
119 requires: blopex
120 filter: grep -v tolerance | sed -e "s/hermitian/symmetric/"
121
122 TEST*/
123