Date: 2023-01-26T12:19:19+00:00

Actual source code: test5.c
slepc-3.18.2 2023-01-26
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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 PEP view and monitor functionality.\n\n";

     13: #include <slepcpep.h>

     15: int main(int argc,char **argv)
     16: {
     17:   Mat            A[3];
     18:   PEP            pep;
     19:   Vec            xr,xi;
     20:   PetscScalar    kr,ki;
     21:   PetscInt       n=6,Istart,Iend,i,nconv,its;
     22:   PetscReal      errest;
     23:   PetscBool      checkfile;
     24:   char           filename[PETSC_MAX_PATH_LEN];
     25:   PetscViewer    viewer;

     28:   SlepcInitialize(&argc,&argv,(char*)0,help);
     29:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
     30:   PetscPrintf(PETSC_COMM_WORLD,"\nPEP of diagonal problem, n=%" PetscInt_FMT "\n\n",n);

     32:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     33:         Generate the matrices
     34:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
     35:   MatCreate(PETSC_COMM_WORLD,&A[0]);
     36:   MatSetSizes(A[0],PETSC_DECIDE,PETSC_DECIDE,n,n);
     37:   MatSetFromOptions(A[0]);
     38:   MatSetUp(A[0]);
     39:   MatGetOwnershipRange(A[0],&Istart,&Iend);
     40:   for (i=Istart;i<Iend;i++) MatSetValue(A[0],i,i,i+1,INSERT_VALUES);
     41:   MatAssemblyBegin(A[0],MAT_FINAL_ASSEMBLY);
     42:   MatAssemblyEnd(A[0],MAT_FINAL_ASSEMBLY);

     44:   MatCreate(PETSC_COMM_WORLD,&A[1]);
     45:   MatSetSizes(A[1],PETSC_DECIDE,PETSC_DECIDE,n,n);
     46:   MatSetFromOptions(A[1]);
     47:   MatSetUp(A[1]);
     48:   for (i=Istart;i<Iend;i++) MatSetValue(A[1],i,i,-1.5,INSERT_VALUES);
     49:   MatAssemblyBegin(A[1],MAT_FINAL_ASSEMBLY);
     50:   MatAssemblyEnd(A[1],MAT_FINAL_ASSEMBLY);

     52:   MatCreate(PETSC_COMM_WORLD,&A[2]);
     53:   MatSetSizes(A[2],PETSC_DECIDE,PETSC_DECIDE,n,n);
     54:   MatSetFromOptions(A[2]);
     55:   MatSetUp(A[2]);
     56:   for (i=Istart;i<Iend;i++) MatSetValue(A[2],i,i,-1.0/(i+1),INSERT_VALUES);
     57:   MatAssemblyBegin(A[2],MAT_FINAL_ASSEMBLY);
     58:   MatAssemblyEnd(A[2],MAT_FINAL_ASSEMBLY);

     60:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     61:                      Create the PEP solver
     62:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
     63:   PEPCreate(PETSC_COMM_WORLD,&pep);
     64:   PetscObjectSetName((PetscObject)pep,"pep");
     65:   PEPSetOperators(pep,3,A);
     66:   PEPSetFromOptions(pep);

     68:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     69:                 Solve the eigensystem and display solution
     70:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
     71:   PEPSolve(pep);
     72:   PEPGetConverged(pep,&nconv);
     73:   PEPGetIterationNumber(pep,&its);
     74:   PetscPrintf(PETSC_COMM_WORLD," %" PetscInt_FMT " converged eigenpairs after %" PetscInt_FMT " iterations\n",nconv,its);
     75:   if (nconv>0) {
     76:     MatCreateVecs(A[0],&xr,&xi);
     77:     PEPGetEigenpair(pep,0,&kr,&ki,xr,xi);
     78:     VecDestroy(&xr);
     79:     VecDestroy(&xi);
     80:     PEPGetErrorEstimate(pep,0,&errest);
     81:   }
     82:   PEPErrorView(pep,PEP_ERROR_RELATIVE,NULL);

     84:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     85:                    Check file containing the eigenvalues
     86:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
     87:   PetscOptionsGetString(NULL,NULL,"-checkfile",filename,sizeof(filename),&checkfile);
     88:   if (checkfile) {
     89: #if defined(PETSC_HAVE_COMPLEX)
     90:     PetscComplex *eigs,eval;
     91:     PetscMalloc1(nconv,&eigs);
     92:     PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer);
     93:     PetscViewerBinaryRead(viewer,eigs,nconv,NULL,PETSC_COMPLEX);
     94:     PetscViewerDestroy(&viewer);
     95:     for (i=0;i<nconv;i++) {
     96:       PEPGetEigenpair(pep,i,&kr,&ki,NULL,NULL);
     97: #if defined(PETSC_USE_COMPLEX)
     98:       eval = kr;
     99: #else
    100:       eval = PetscCMPLX(kr,ki);
    101: #endif
    103:     }
    104:     PetscFree(eigs);
    105: #else
    106:     SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP,"The -checkfile option requires C99 complex numbers");
    107: #endif
    108:   }

    110:   PEPDestroy(&pep);
    111:   MatDestroy(&A[0]);
    112:   MatDestroy(&A[1]);
    113:   MatDestroy(&A[2]);
    114:   SlepcFinalize();
    115:   return 0;
    116: }

    118: /*TEST

    120:    test:
    121:       suffix: 1
    122:       args: -pep_error_backward ::ascii_info_detail -pep_largest_real -pep_view_values -pep_monitor_conv -pep_error_absolute ::ascii_matlab -pep_monitor_all -pep_converged_reason -pep_view
    123:       requires: !single
    124:       filter: grep -v "tolerance" | grep -v "problem type" | sed -e "s/[+-]0\.0*i//g" -e "s/\([0-9]\.[5]*\)[+-][0-9]\.[0-9]*e-[0-9]*i/\\1/g" -e "s/[0-9]\.[0-9]*e-\([0-9]*\)/removed/g"

    126:    test:
    127:       suffix: 2
    128:       args: -n 12 -pep_largest_real -pep_monitor -pep_view_values ::ascii_matlab
    129:       requires: double
    130:       filter: sed -e "s/[+-][0-9]\.[0-9]*e-[0-9]*i//" -e "s/[0-9]\.[0-9]*e-\([0-9]*\)/removed/g" -e "s/5\.\([49]\)999999[0-9]*e+00/5.\\1999999999999999e+00/"

    132:    test:
    133:       suffix: 3
    134:       args: -pep_nev 4 -pep_view_values binary:myvalues.bin -checkfile myvalues.bin
    135:       requires: double c99_complex

    137:    test:
    138:       suffix: 4
    139:       args: -pep_nev 4 -pep_ncv 10 -pep_refine -pep_conv_norm -pep_extract none -pep_scale scalar -pep_view -pep_monitor -pep_error_relative ::ascii_info_detail
    140:       requires: double !complex
    141:       filter: grep -v "tolerance" | sed -e "s/[0-9]\.[0-9]*e-\([0-9]*\)/removed/g"

    143:    test:
    144:       suffix: 5
    145:       args: -n 12 -pep_largest_real -pep_monitor draw::draw_lg -pep_monitor_all draw::draw_lg -pep_view_values draw -draw_save myeigen.ppm -draw_virtual
    146:       requires: x double

    148: TEST*/