Date: 2024-04-26T10:23:01+00:00

Actual source code: test13.c
slepc-3.21.1 2024-04-26
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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 BV operations using internal buffer instead of array arguments.\n\n";

     13: #include <slepcbv.h>

     15: int main(int argc,char **argv)
     16: {
     17:   Vec            t,v,z;
     18:   BV             X;
     19:   PetscInt       i,j,n=10,k=5,l=3;
     20:   PetscReal      nrm;
     21:   PetscViewer    view;
     22:   PetscBool      verbose;

     24:   PetscFunctionBeginUser;
     25:   PetscCall(SlepcInitialize(&argc,&argv,(char*)0,help));
     26:   PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
     27:   PetscCall(PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL));
     28:   PetscCall(PetscOptionsGetInt(NULL,NULL,"-l",&l,NULL));
     29:   PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
     30:   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Test BV with %" PetscInt_FMT " columns of dimension %" PetscInt_FMT ".\n",k,n));

     32:   /* Create template vector */
     33:   PetscCall(VecCreate(PETSC_COMM_WORLD,&t));
     34:   PetscCall(VecSetSizes(t,PETSC_DECIDE,n));
     35:   PetscCall(VecSetFromOptions(t));

     37:   /* Create BV object X */
     38:   PetscCall(BVCreate(PETSC_COMM_WORLD,&X));
     39:   PetscCall(PetscObjectSetName((PetscObject)X,"X"));
     40:   PetscCall(BVSetSizesFromVec(X,t,k));
     41:   PetscCall(BVSetFromOptions(X));

     43:   /* Set up viewer */
     44:   PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view));
     45:   if (verbose) PetscCall(PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB));

     47:   /* Fill X entries */
     48:   for (j=0;j<k;j++) {
     49:     PetscCall(BVGetColumn(X,j,&v));
     50:     PetscCall(VecSet(v,0.0));
     51:     for (i=0;i<4;i++) {
     52:       if (i+j<n) PetscCall(VecSetValue(v,i+j,(PetscScalar)(3*i+j-2),INSERT_VALUES));
     53:     }
     54:     PetscCall(VecAssemblyBegin(v));
     55:     PetscCall(VecAssemblyEnd(v));
     56:     PetscCall(BVRestoreColumn(X,j,&v));
     57:   }
     58:   if (verbose) PetscCall(BVView(X,view));

     60:   /* Test BVDotColumn */
     61:   PetscCall(BVDotColumn(X,2,NULL));
     62:   if (verbose) {
     63:     PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After BVDotColumn - - - - - - -\n"));
     64:     PetscCall(BVGetBufferVec(X,&z));
     65:     PetscCall(VecView(z,view));
     66:   }
     67:   /* Test BVMultColumn */
     68:   PetscCall(BVMultColumn(X,-1.0,1.0,2,NULL));
     69:   if (verbose) {
     70:     PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After BVMultColumn - - - - - - - - -\n"));
     71:     PetscCall(BVView(X,view));
     72:   }

     74:   PetscCall(BVNorm(X,NORM_FROBENIUS,&nrm));
     75:   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Frobenius Norm or X = %g\n",(double)nrm));

     77:   PetscCall(BVDestroy(&X));
     78:   PetscCall(VecDestroy(&t));
     79:   PetscCall(SlepcFinalize());
     80:   return 0;
     81: }

     83: /*TEST

     85:    testset:
     86:       output_file: output/test13_1.out
     87:       test:
     88:          suffix: 1
     89:          args: -bv_type {{vecs contiguous svec mat}shared output}
     90:       test:
     91:          suffix: 1_cuda
     92:          args: -bv_type {{svec mat}} -vec_type cuda
     93:          requires: cuda

     95: TEST*/