Date: 2021-09-20T09:44:06+00:00

Actual source code: test5.c
slepc-3.15.2 2021-09-20
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      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-2021, 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:   PetscComplex   *eigs,eval;
     22:   PetscInt       n=6,Istart,Iend,i,nconv,its;
     23:   PetscReal      errest;
     24:   PetscBool      checkfile;
     25:   char           filename[PETSC_MAX_PATH_LEN];
     26:   PetscViewer    viewer;

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

     33:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     34:         Generate the matrices
     35:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
     36:   MatCreate(PETSC_COMM_WORLD,&A[0]);
     37:   MatSetSizes(A[0],PETSC_DECIDE,PETSC_DECIDE,n,n);
     38:   MatSetFromOptions(A[0]);
     39:   MatSetUp(A[0]);
     40:   MatGetOwnershipRange(A[0],&Istart,&Iend);
     41:   for (i=Istart;i<Iend;i++) {
     42:     MatSetValue(A[0],i,i,i+1,INSERT_VALUES);
     43:   }
     44:   MatAssemblyBegin(A[0],MAT_FINAL_ASSEMBLY);
     45:   MatAssemblyEnd(A[0],MAT_FINAL_ASSEMBLY);

     47:   MatCreate(PETSC_COMM_WORLD,&A[1]);
     48:   MatSetSizes(A[1],PETSC_DECIDE,PETSC_DECIDE,n,n);
     49:   MatSetFromOptions(A[1]);
     50:   MatSetUp(A[1]);
     51:   for (i=Istart;i<Iend;i++) {
     52:     MatSetValue(A[1],i,i,-1.5,INSERT_VALUES);
     53:   }
     54:   MatAssemblyBegin(A[1],MAT_FINAL_ASSEMBLY);
     55:   MatAssemblyEnd(A[1],MAT_FINAL_ASSEMBLY);

     57:   MatCreate(PETSC_COMM_WORLD,&A[2]);
     58:   MatSetSizes(A[2],PETSC_DECIDE,PETSC_DECIDE,n,n);
     59:   MatSetFromOptions(A[2]);
     60:   MatSetUp(A[2]);
     61:   for (i=Istart;i<Iend;i++) {
     62:     MatSetValue(A[2],i,i,-1.0/(i+1),INSERT_VALUES);
     63:   }
     64:   MatAssemblyBegin(A[2],MAT_FINAL_ASSEMBLY);
     65:   MatAssemblyEnd(A[2],MAT_FINAL_ASSEMBLY);

     67:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     68:                      Create the PEP solver
     69:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
     70:   PEPCreate(PETSC_COMM_WORLD,&pep);
     71:   PetscObjectSetName((PetscObject)pep,"pep");
     72:   PEPSetOperators(pep,3,A);
     73:   PEPSetFromOptions(pep);

     75:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     76:                 Solve the eigensystem and display solution
     77:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
     78:   PEPSolve(pep);
     79:   PEPGetConverged(pep,&nconv);
     80:   PEPGetIterationNumber(pep,&its);
     81:   PetscPrintf(PETSC_COMM_WORLD," %D converged eigenpairs after %D iterations\n",nconv,its);
     82:   if (nconv>0) {
     83:     MatCreateVecs(A[0],&xr,&xi);
     84:     PEPGetEigenpair(pep,0,&kr,&ki,xr,xi);
     85:     VecDestroy(&xr);
     86:     VecDestroy(&xi);
     87:     PEPGetErrorEstimate(pep,0,&errest);
     88:   }
     89:   PEPErrorView(pep,PEP_ERROR_RELATIVE,NULL);

     91:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     92:                    Check file containing the eigenvalues
     93:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
     94:   PetscOptionsGetString(NULL,NULL,"-checkfile",filename,sizeof(filename),&checkfile);
     95:   if (checkfile) {
     96:     PetscMalloc1(nconv,&eigs);
     97:     PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer);
     98:     PetscViewerBinaryRead(viewer,eigs,nconv,NULL,PETSC_COMPLEX);
     99:     PetscViewerDestroy(&viewer);
    100:     for (i=0;i<nconv;i++) {
    101:       PEPGetEigenpair(pep,i,&kr,&ki,NULL,NULL);
    102: #if defined(PETSC_USE_COMPLEX)
    103:       eval = kr;
    104: #else
    105:       eval = PetscCMPLX(kr,ki);
    106: #endif
    107:       if (eval!=eigs[i]) SETERRQ(PETSC_COMM_WORLD,1,"Eigenvalues in the file do not match");
    108:     }
    109:     PetscFree(eigs);
    110:   }

    112:   PEPDestroy(&pep);
    113:   MatDestroy(&A[0]);
    114:   MatDestroy(&A[1]);
    115:   MatDestroy(&A[2]);
    116:   SlepcFinalize();
    117:   return ierr;
    118: }

    120: /*TEST

    122:    test:
    123:       suffix: 1
    124:       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
    125:       requires: !single
    126:       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"

    128:    test:
    129:       suffix: 2
    130:       args: -n 12 -pep_largest_real -pep_monitor -pep_view_values ::ascii_matlab
    131:       requires: double
    132:       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/"

    134:    test:
    135:       suffix: 3
    136:       args: -pep_nev 4 -pep_view_values binary:myvalues.bin -checkfile myvalues.bin
    137:       requires: double

    139:    test:
    140:       suffix: 4
    141:       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
    142:       requires: double !complex
    143:       filter: grep -v "tolerance" | sed -e "s/[0-9]\.[0-9]*e-\([0-9]*\)/removed/g"

    145:    test:
    146:       suffix: 5
    147:       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
    148:       requires: double

    150: TEST*/