LCOV - code coverage report
Current view: top level - sys/classes/ds/tests - test26.c (source / functions) Hit Total Coverage
Test: SLEPc Lines: 76 78 97.4 %
Date: 2024-11-21 00:40:22 Functions: 1 1 100.0 %
Legend: Lines: hit not hit

          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 DSHSVD with compact storage.\n\n";
      12             : 
      13             : #include <slepcds.h>
      14             : 
      15           4 : int main(int argc,char **argv)
      16             : {
      17           4 :   DS             ds;
      18           4 :   SlepcSC        sc;
      19           4 :   PetscReal      *T,*D,sigma;
      20           4 :   PetscScalar    *U,*w,d;
      21           4 :   PetscInt       i,n=10,m,l=2,k=5,p=1,ld;
      22           4 :   PetscViewer    viewer;
      23           4 :   PetscBool      verbose,extrarow,reorthog,flg;
      24             : 
      25           4 :   PetscFunctionBeginUser;
      26           4 :   PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
      27           4 :   PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
      28           4 :   m = n;
      29           4 :   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Solve a Dense System of type HSVD with compact storage - dimension %" PetscInt_FMT "x%" PetscInt_FMT ".\n",n,m));
      30           4 :   PetscCall(PetscOptionsGetInt(NULL,NULL,"-l",&l,NULL));
      31           4 :   PetscCall(PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL));
      32           4 :   PetscCall(PetscOptionsGetInt(NULL,NULL,"-p",&p,NULL));
      33           4 :   PetscCheck(l<=n && k<=n && l<=k && p>=0 && p<=n-l,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Wrong value of dimensions");
      34           4 :   PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
      35           4 :   PetscCall(PetscOptionsHasName(NULL,NULL,"-extrarow",&extrarow));
      36           4 :   PetscCall(PetscOptionsHasName(NULL,NULL,"-reorthog",&reorthog));
      37             : 
      38             :   /* Create DS object */
      39           4 :   PetscCall(DSCreate(PETSC_COMM_WORLD,&ds));
      40           4 :   PetscCall(DSSetType(ds,DSHSVD));
      41           4 :   PetscCall(DSSetFromOptions(ds));
      42           4 :   ld = n+2;  /* test leading dimension larger than n */
      43           4 :   PetscCall(DSAllocate(ds,ld));
      44           4 :   PetscCall(DSSetDimensions(ds,n,l,k));
      45           4 :   PetscCall(DSHSVDSetDimensions(ds,m));
      46           4 :   PetscCall(DSSetCompact(ds,PETSC_TRUE));
      47           4 :   PetscCall(DSSetExtraRow(ds,extrarow));
      48           4 :   PetscCall(DSHSVDSetReorthogonalize(ds,reorthog));
      49           4 :   PetscCall(DSHSVDGetReorthogonalize(ds,&flg));
      50           4 :   if (flg) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"reorthogonalizing\n"));
      51             : 
      52             :   /* Set up viewer */
      53           4 :   PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&viewer));
      54           4 :   PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO_DETAIL));
      55           4 :   PetscCall(DSView(ds,viewer));
      56           4 :   PetscCall(PetscViewerPopFormat(viewer));
      57           4 :   PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_MATLAB));
      58             : 
      59             :   /* Fill upper arrow-bidiagonal matrix and signature matrix */
      60           4 :   PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T));
      61          44 :   for (i=0;i<n;i++) T[i] = (PetscReal)(i+1);
      62          34 :   for (i=l;i<n-1;i++) T[i+ld] = 1.0;
      63           4 :   if (extrarow) T[n-1+ld] = 1.0;
      64           4 :   PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T));
      65           4 :   PetscCall(DSGetArrayReal(ds,DS_MAT_D,&D));
      66          44 :   for (i=0;i<n;i++) D[i] = (i>=l && i<l+p)? -1.0: 1.0;
      67           4 :   PetscCall(DSRestoreArrayReal(ds,DS_MAT_D,&D));
      68           4 :   if (l==0 && k==0) PetscCall(DSSetState(ds,DS_STATE_INTERMEDIATE));
      69           3 :   else PetscCall(DSSetState(ds,DS_STATE_RAW));
      70           4 :   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Initial - - - - - - - - -\n"));
      71           4 :   PetscCall(DSView(ds,viewer));
      72             : 
      73             :   /* Solve */
      74           4 :   PetscCall(PetscMalloc1(n,&w));
      75           4 :   PetscCall(DSGetSlepcSC(ds,&sc));
      76           4 :   sc->comparison    = SlepcCompareLargestReal;
      77           4 :   sc->comparisonctx = NULL;
      78           4 :   sc->map           = NULL;
      79           4 :   sc->mapobj        = NULL;
      80           4 :   PetscCall(DSSolve(ds,w,NULL));
      81           4 :   PetscCall(DSSort(ds,w,NULL,NULL,NULL,NULL));
      82           4 :   if (extrarow) PetscCall(DSUpdateExtraRow(ds));
      83           4 :   if (verbose) {
      84           0 :     PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After solve - - - - - - - - -\n"));
      85           0 :     PetscCall(DSView(ds,viewer));
      86             :   }
      87             : 
      88             :   /* Print singular values */
      89           4 :   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Computed singular values =\n"));
      90          44 :   for (i=0;i<n;i++) {
      91          40 :     sigma = PetscRealPart(w[i]);
      92          40 :     PetscCall(PetscViewerASCIIPrintf(viewer,"  %.5f\n",(double)sigma));
      93             :   }
      94             : 
      95           4 :   if (extrarow) {
      96             :     /* Check that extra row is correct */
      97           2 :     PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T));
      98           2 :     PetscCall(DSGetArray(ds,DS_MAT_U,&U));
      99           2 :     PetscCall(DSGetArrayReal(ds,DS_MAT_D,&D));
     100           2 :     d = 0.0;
     101          18 :     for (i=l;i<n;i++) d += T[i+ld]-D[i]*U[n-1+i*ld];
     102           2 :     if (PetscAbsScalar(d)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: there is a mismatch in the extra row of %g\n",(double)PetscAbsScalar(d)));
     103           2 :     PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T));
     104           2 :     PetscCall(DSRestoreArray(ds,DS_MAT_U,&U));
     105           2 :     PetscCall(DSRestoreArrayReal(ds,DS_MAT_D,&D));
     106             :   }
     107           4 :   PetscCall(PetscFree(w));
     108           4 :   PetscCall(DSDestroy(&ds));
     109           4 :   PetscCall(SlepcFinalize());
     110             :   return 0;
     111             : }
     112             : 
     113             : /*TEST
     114             : 
     115             :    test:
     116             :       suffix: 1
     117             :       requires: !single
     118             : 
     119             :    test:
     120             :       args: -l 0 -k 0
     121             :       suffix: 2
     122             :       requires: !single
     123             : 
     124             :    test:
     125             :       args: -extrarow -reorthog {{0 1}}
     126             :       suffix: 3
     127             :       requires: !single
     128             :       filter: grep -v reorthogonalizing
     129             : 
     130             : TEST*/

Generated by: LCOV version 1.14