Line data    Source code

       1             : /*
       2             :    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
       3             :    SLEPc - Scalable Library for Eigenvalue Problem Computations
       4             :    Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
       5             : 
       6             :    This file is part of SLEPc.
       7             :    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
       8             :    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
       9             : */
      10             : 
      11             : static char help[] = "Test BV operations with non-standard inner product.\n\n";
      12             : 
      13             : #include <slepcbv.h>
      14             : 
      15          21 : int main(int argc,char **argv)
      16             : {
      17          21 :   Vec            t,v;
      18          21 :   Mat            B,M;
      19          21 :   BV             X;
      20          21 :   PetscInt       i,j,n=10,k=5,Istart,Iend;
      21          21 :   PetscScalar    alpha;
      22          21 :   PetscReal      nrm;
      23          21 :   PetscViewer    view;
      24          21 :   PetscBool      verbose;
      25             : 
      26          21 :   PetscFunctionBeginUser;
      27          21 :   PetscCall(SlepcInitialize(&argc,&argv,(char*)0,help));
      28          21 :   PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
      29          21 :   PetscCall(PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL));
      30          21 :   PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
      31          21 :   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Test BV with non-standard inner product (n=%" PetscInt_FMT ", k=%" PetscInt_FMT ").\n",n,k));
      32             : 
      33             :   /* Create inner product matrix */
      34          21 :   PetscCall(MatCreate(PETSC_COMM_WORLD,&B));
      35          21 :   PetscCall(MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,n,n));
      36          21 :   PetscCall(MatSetFromOptions(B));
      37          21 :   PetscCall(PetscObjectSetName((PetscObject)B,"B"));
      38             : 
      39          21 :   PetscCall(MatGetOwnershipRange(B,&Istart,&Iend));
      40         151 :   for (i=Istart;i<Iend;i++) {
      41         130 :     if (i>0) PetscCall(MatSetValue(B,i,i-1,-1.0,INSERT_VALUES));
      42         130 :     if (i<n-1) PetscCall(MatSetValue(B,i,i+1,-1.0,INSERT_VALUES));
      43         130 :     PetscCall(MatSetValue(B,i,i,2.0,INSERT_VALUES));
      44             :   }
      45          21 :   PetscCall(MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY));
      46          21 :   PetscCall(MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY));
      47          21 :   PetscCall(MatCreateVecs(B,&t,NULL));
      48             : 
      49             :   /* Create BV object X */
      50          21 :   PetscCall(BVCreate(PETSC_COMM_WORLD,&X));
      51          21 :   PetscCall(PetscObjectSetName((PetscObject)X,"X"));
      52          21 :   PetscCall(BVSetSizesFromVec(X,t,k));
      53          21 :   PetscCall(BVSetFromOptions(X));
      54          21 :   PetscCall(BVSetMatrix(X,B,PETSC_FALSE));
      55             : 
      56             :   /* Set up viewer */
      57          21 :   PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view));
      58          21 :   if (verbose) PetscCall(PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB));
      59             : 
      60             :   /* Fill X entries */
      61         126 :   for (j=0;j<k;j++) {
      62         105 :     PetscCall(BVGetColumn(X,j,&v));
      63         105 :     PetscCall(VecSet(v,0.0));
      64         525 :     for (i=0;i<4;i++) {
      65         420 :       if (i+j<n) PetscCall(VecSetValue(v,i+j,(PetscScalar)(3*i+j-2),INSERT_VALUES));
      66             :     }
      67         105 :     PetscCall(VecAssemblyBegin(v));
      68         105 :     PetscCall(VecAssemblyEnd(v));
      69         105 :     PetscCall(BVRestoreColumn(X,j,&v));
      70             :   }
      71          21 :   if (verbose) {
      72           0 :     PetscCall(MatView(B,view));
      73           0 :     PetscCall(BVView(X,view));
      74             :   }
      75             : 
      76             :   /* Test BVNormColumn */
      77          21 :   PetscCall(BVNormColumn(X,0,NORM_2,&nrm));
      78          21 :   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"B-Norm of X[0] = %g\n",(double)nrm));
      79             : 
      80             :   /* Test BVOrthogonalizeColumn */
      81         126 :   for (j=0;j<k;j++) {
      82         105 :     PetscCall(BVOrthogonalizeColumn(X,j,NULL,&nrm,NULL));
      83         105 :     alpha = 1.0/nrm;
      84         105 :     PetscCall(BVScaleColumn(X,j,alpha));
      85             :   }
      86          21 :   if (verbose) PetscCall(BVView(X,view));
      87             : 
      88             :   /* Check orthogonality */
      89          21 :   PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,k,k,NULL,&M));
      90          21 :   PetscCall(BVDot(X,X,M));
      91          21 :   PetscCall(MatShift(M,-1.0));
      92          21 :   PetscCall(MatNorm(M,NORM_1,&nrm));
      93          21 :   if (nrm<100*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Level of orthogonality < 100*eps\n"));
      94           0 :   else PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Level of orthogonality: %g\n",(double)nrm));
      95             : 
      96             :   /* Test BVNormVecBegin/End */
      97          21 :   PetscCall(BVGetColumn(X,0,&v));
      98          21 :   PetscCall(BVNormVecBegin(X,v,NORM_1,&nrm));
      99          21 :   PetscCall(BVNormVecEnd(X,v,NORM_1,&nrm));
     100          21 :   PetscCall(BVRestoreColumn(X,0,&v));
     101          21 :   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"B-Norm of X[0] = %g\n",(double)nrm));
     102             : 
     103          21 :   PetscCall(BVDestroy(&X));
     104          21 :   PetscCall(MatDestroy(&M));
     105          21 :   PetscCall(MatDestroy(&B));
     106          21 :   PetscCall(VecDestroy(&t));
     107          21 :   PetscCall(SlepcFinalize());
     108             :   return 0;
     109             : }
     110             : 
     111             : /*TEST
     112             : 
     113             :    testset:
     114             :       output_file: output/test3_1.out
     115             :       test:
     116             :          suffix: 1
     117             :          args: -bv_type {{vecs contiguous svec mat}shared output}
     118             :       test:
     119             :          suffix: 1_svec_vecs
     120             :          args: -bv_type svec -bv_matmult vecs
     121             :       test:
     122             :          suffix: 1_cuda
     123             :          args: -bv_type {{svec mat}} -mat_type aijcusparse
     124             :          requires: cuda
     125             :       test:
     126             :          suffix: 2
     127             :          nsize: 2
     128             :          args: -bv_type {{vecs contiguous svec mat}shared output}
     129             :       test:
     130             :          suffix: 3
     131             :          nsize: 2
     132             :          args: -bv_type {{vecs contiguous svec mat}shared output} -bv_orthog_type mgs
     133             : 
     134             : TEST*/