Date: 2021-02-01T14:42:01+00:00

Actual source code: test32.c
slepc-3.14.2 2021-02-01
Report Typos and Errors

      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-2020, 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[] = "Tests a GHEP problem with symmetric matrices.\n\n";

     13: #include <slepceps.h>

     15: int main(int argc,char **argv)
     16: {
     17:   Mat            A,B;        /* matrices */
     18:   EPS            eps;        /* eigenproblem solver context */
     19:   ST             st;
     20:   KSP            ksp;
     21:   PC             pc;
     22:   PCType         pctype;
     23:   PetscInt       N,n=45,m,Istart,Iend,II,i,j;
     24:   PetscBool      flag;

     27:   SlepcInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
     28:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
     29:   PetscOptionsGetInt(NULL,NULL,"-m",&m,&flag);
     30:   if (!flag) m=n;
     31:   N = n*m;
     32:   PetscPrintf(PETSC_COMM_WORLD,"\nGeneralized Symmetric Eigenproblem, N=%D (%Dx%D grid)\n\n",N,n,m);

     34:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     35:      Compute the matrices that define the eigensystem, Ax=kBx
     36:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

     38:   MatCreate(PETSC_COMM_WORLD,&A);
     39:   MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,N);
     40:   MatSetFromOptions(A);
     41:   MatSetUp(A);

     43:   MatCreate(PETSC_COMM_WORLD,&B);
     44:   MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,N,N);
     45:   MatSetFromOptions(B);
     46:   MatSetUp(B);

     48:   MatGetOwnershipRange(A,&Istart,&Iend);
     49:   for (II=Istart;II<Iend;II++) {
     50:     i = II/n; j = II-i*n;
     51:     if (i>0) { MatSetValue(A,II,II-n,-1.0,INSERT_VALUES); }
     52:     if (i<m-1) { MatSetValue(A,II,II+n,-1.0,INSERT_VALUES); }
     53:     if (j>0) { MatSetValue(A,II,II-1,-1.0,INSERT_VALUES); }
     54:     if (j<n-1) { MatSetValue(A,II,II+1,-1.0,INSERT_VALUES); }
     55:     MatSetValue(A,II,II,4.0,INSERT_VALUES);
     56:     MatSetValue(B,II,II,2.0/PetscLogScalar(II+2),INSERT_VALUES);
     57:   }
     58:   MatSetValue(B,0,1,0.4,INSERT_VALUES);
     59:   MatSetValue(B,1,0,0.4,INSERT_VALUES);

     61:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
     62:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
     63:   MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);
     64:   MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);

     66:   MatSetOption(A,MAT_SYMMETRIC,PETSC_TRUE);
     67:   MatSetOption(A,MAT_HERMITIAN,PETSC_TRUE);
     68:   MatSetOption(B,MAT_SYMMETRIC,PETSC_TRUE);
     69:   MatSetOption(B,MAT_HERMITIAN,PETSC_TRUE);

     71:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     72:                 Create the eigensolver and solve the problem
     73:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

     75:   EPSCreate(PETSC_COMM_WORLD,&eps);
     76:   EPSSetOperators(eps,A,B);
     77:   EPSSetProblemType(eps,EPS_GHEP);
     78:   EPSSetFromOptions(eps);
     79:   EPSSetUp(eps);
     80:   EPSGetST(eps,&st);
     81:   STGetKSP(st,&ksp);
     82:   KSPGetPC(ksp,&pc);
     83:   PCGetType(pc,&pctype);
     84:   PetscPrintf(PETSC_COMM_WORLD," Using %s for the PC\n",pctype);
     85:   EPSSolve(eps);
     86:   EPSErrorView(eps,EPS_ERROR_BACKWARD,NULL);

     88:   EPSDestroy(&eps);
     89:   MatDestroy(&A);
     90:   MatDestroy(&B);
     91:   SlepcFinalize();
     92:   return ierr;
     93: }

     95: /*TEST

     97:    test:
     98:       suffix: 1
     99:       args: -n 18 -eps_nev 3 -st_type sinvert -eps_target 1.02

    101:    test:
    102:       suffix: 2
    103:       args: -n 18 -eps_type ciss -rg_interval_endpoints 1.0,1.2

    105:    testset:
    106:       nsize: {{1 4}}
    107:       args: -n 8 -eps_nev 60 -st_pc_type redundant
    108:       filter: grep -v Using
    109:       requires: !single !valgrind
    110:       output_file: output/test32_3.out
    111:       test:
    112:          suffix: 3
    113:       test:
    114:          suffix: 3_gnhep
    115:          args: -eps_gen_non_hermitian

    117:    testset:
    118:       nsize: {{1 4}}
    119:       args: -n 8 -eps_nev 64 -st_pc_type redundant
    120:       filter: grep -v Using
    121:       requires: !single
    122:       output_file: output/test32_4.out
    123:       test:
    124:          suffix: 4
    125:       test:
    126:          suffix: 4_gnhep
    127:          args: -eps_gen_non_hermitian

    129:    testset:
    130:       requires: !single
    131:       args: -eps_tol 1e-10 -st_type sinvert -st_ksp_type preonly -st_pc_type cholesky -eps_interval .8,1.1 -eps_krylovschur_partitions 2
    132:       output_file: output/test32_5.out
    133:       nsize: 3
    134:       test:
    135:          suffix: 5_mumps
    136:          requires: mumps !complex
    137:          args: -st_pc_factor_mat_solver_type mumps -mat_mumps_icntl_13 1
    138:       test:
    139:          suffix: 5_superlu
    140:          requires: superlu_dist
    141:          args: -st_pc_factor_mat_solver_type superlu_dist -mat_superlu_dist_rowperm NOROWPERM

    143: TEST*/