1: /*
  2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
  4:    Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain

  6:    This file is part of SLEPc.
  7:    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
  8:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  9: */

 11: static char help[] = "Test EPS with different builds with a matrix loaded from a file.\n"
 12:   "This test is based on ex4.c in tutorials.\n"
 13:   "It loads test matrices available in PETSc's distribution.\n"
 14:   "Add -symm or -herm to select the symmetric/Hermitian matrix.\n\n";

 16: #include <slepceps.h>

 18: int main(int argc,char **argv)
 19: {
 20:   Mat            A;               /* operator matrix */
 21:   EPS            eps;             /* eigenproblem solver context */
 22:   char           filename[PETSC_MAX_PATH_LEN];
 23:   const char     *prefix,*scalar,*ints,*floats;
 24:   PetscReal      tol=PETSC_SMALL;
 25:   PetscViewer    viewer;
 26:   PetscBool      flg,symm;

 28:   PetscFunctionBeginUser;
 29:   PetscCall(SlepcInitialize(&argc,&argv,NULL,help));

 31:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 32:         Load the operator matrix that defines the eigensystem, Ax=kx
 33:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 34:   PetscCall(PetscOptionsHasName(NULL,NULL,"-symm",&symm));
 35:   PetscCall(PetscOptionsHasName(NULL,NULL,"-herm",&flg));
 36:   if (flg) symm=PETSC_TRUE;
 37: #if defined(PETSC_USE_COMPLEX)
 38:   prefix = symm? "hpd": "nh";
 39:   scalar = "complex";
 40: #else
 41:   prefix = symm? "spd": "ns";
 42:   scalar = "real";
 43: #endif
 44: #if defined(PETSC_USE_64BIT_INDICES)
 45:   ints   = "int64";
 46: #else
 47:   ints   = "int32";
 48: #endif
 49: #if defined(PETSC_USE_REAL_DOUBLE)
 50:   floats = "float64";
 51: #elif defined(PETSC_USE_REAL_SINGLE)
 52:   floats = "float32";
 53: #endif

 55:   PetscCall(PetscSNPrintf(filename,sizeof(filename),"%s/share/petsc/datafiles/matrices/%s-%s-%s-%s",PETSC_DIR,prefix,scalar,ints,floats));
 56:   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nReading matrix from binary file...\n\n"));
 57:   PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer));
 58:   PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
 59:   PetscCall(MatSetFromOptions(A));
 60:   PetscCall(MatLoad(A,viewer));
 61:   PetscCall(PetscViewerDestroy(&viewer));

 63:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 64:                      Create the eigensolver
 65:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 66:   PetscCall(EPSCreate(PETSC_COMM_WORLD,&eps));
 67:   PetscCall(EPSSetOperators(eps,A,NULL));
 68:   if (symm) PetscCall(EPSSetProblemType(eps,EPS_HEP));
 69:   else PetscCall(EPSSetProblemType(eps,EPS_NHEP));
 70:   PetscCall(EPSSetTolerances(eps,tol,PETSC_CURRENT));
 71:   PetscCall(EPSSetFromOptions(eps));

 73:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 74:                 Solve the eigensystem and display solution
 75:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 76:   PetscCall(EPSSolve(eps));
 77:   PetscCall(EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL));
 78:   PetscCall(EPSDestroy(&eps));
 79:   PetscCall(MatDestroy(&A));
 80:   PetscCall(SlepcFinalize());
 81:   return 0;
 82: }

 84: /*TEST

 86:    build:
 87:       requires: !__float128

 89:    testset:
 90:       args: -eps_nev 3
 91:       requires: !complex
 92:       filter: sed -e "s/92073/92072/" | sed -e "s/80649/80648/" | sed -e "s/80647/80648/" | sed -e "s/45755/45756/"
 93:       output_file: output/test5_1.out
 94:       test:
 95:          suffix: 1
 96:          args: -eps_type {{krylovschur subspace arnoldi gd}}
 97:       test:
 98:          suffix: 1_power
 99:          args: -eps_type power -st_type sinvert -eps_target 7
100:       test:
101:          suffix: 1_jd
102:          args: -eps_type jd -eps_jd_minv 3 -eps_jd_plusk 1
103:       test:
104:          suffix: 1_gd
105:          args: -eps_type gd -eps_gd_minv 3 -eps_gd_plusk 1
106:       test:
107:          suffix: 1_gd2
108:          args: -eps_type gd -eps_gd_double_expansion

110:    testset:
111:       args: -eps_nev 3
112:       requires: double complex
113:       output_file: output/test5_1_complex.out
114:       test:
115:          suffix: 1_complex
116:          args: -eps_type {{krylovschur subspace arnoldi gd}}
117:       test:
118:          suffix: 1_power_complex
119:          args: -eps_type power -st_type sinvert -eps_target 7
120:       test:
121:          suffix: 1_jd_complex
122:          args: -eps_type jd -eps_jd_minv 3 -eps_jd_plusk 1 -eps_max_it 2000
123:       test:
124:          suffix: 1_gd_complex
125:          args: -eps_type gd -eps_gd_minv 3 -eps_gd_plusk 1
126:       test:
127:          suffix: 1_gd2_complex
128:          args: -eps_type gd -eps_gd_double_expansion

130:    testset:
131:       args: -symm -eps_nev 4 -eps_smallest_real
132:       requires: double !complex
133:       output_file: output/test5_2.out
134:       test:
135:         suffix: 2_arpack
136:         args: -eps_type arpack
137:         requires: arpack
138:       test:
139:         suffix: 2_blopex
140:         args: -eps_type blopex
141:         requires: blopex
142:       test:
143:         suffix: 2_trlan
144:         args: -eps_type trlan
145:         requires: trlan

147:    testset:
148:       args: -symm -eps_nev 4 -eps_smallest_real
149:       requires: double complex
150:       output_file: output/test5_2_complex.out
151:       test:
152:         suffix: 2_blopex_complex
153:         args: -eps_type blopex
154:         requires: blopex

156: TEST*/