Actual source code: test5.c

slepc-3.17.0 2022-03-31
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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:   SlepcInitialize(&argc,&argv,(char*)0,help);

 30:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 31:         Load the operator matrix that defines the eigensystem, Ax=kx
 32:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 33:   PetscOptionsHasName(NULL,NULL,"-symm",&symm);
 34:   PetscOptionsHasName(NULL,NULL,"-herm",&flg);
 35:   if (flg) symm=PETSC_TRUE;
 36: #if defined(PETSC_USE_COMPLEX)
 37:   prefix = symm? "hpd": "nh";
 38:   scalar = "complex";
 39: #else
 40:   prefix = symm? "spd": "ns";
 41:   scalar = "real";
 42: #endif
 43: #if defined(PETSC_USE_64BIT_INDICES)
 44:   ints   = "int64";
 45: #else
 46:   ints   = "int32";
 47: #endif
 48: #if defined(PETSC_USE_REAL_DOUBLE)
 49:   floats = "float64";
 50: #elif defined(PETSC_USE_REAL_SINGLE)
 51:   floats = "float32";
 52: #endif

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

 62:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 63:                      Create the eigensolver
 64:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 65:   EPSCreate(PETSC_COMM_WORLD,&eps);
 66:   EPSSetOperators(eps,A,NULL);
 67:   if (symm) EPSSetProblemType(eps,EPS_HEP);
 68:   else EPSSetProblemType(eps,EPS_NHEP);
 69:   EPSSetTolerances(eps,tol,PETSC_DEFAULT);
 70:   EPSSetFromOptions(eps);

 72:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 73:                 Solve the eigensystem and display solution
 74:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 75:   EPSSolve(eps);
 76:   EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL);
 77:   EPSDestroy(&eps);
 78:   MatDestroy(&A);
 79:   SlepcFinalize();
 80:   return 0;
 81: }

 83: /*TEST

 85:    build:
 86:       requires: !__float128

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

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

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

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

155: TEST*/