Date: 2024-09-25T09:33:27+00:00

Actual source code: test5.c
slepc-3.21.2 2024-09-25
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      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,(char*)0,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_DEFAULT));
     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*/