GCC Code Coverage Report

Directory:	./
File:	src/svd/tests/test19.c
Date:	2025-10-04 04:19:13

	Exec	Total	Coverage
Lines:	57	57	100.0%
Functions:	1	1	100.0%
Branches:	174	254	68.5%

  
      Line
      Branch
      Exec
      Source
    
      /*
    
         - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    
         SLEPc - Scalable Library for Eigenvalue Problem Computations
    
         Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
    
         This file is part of SLEPc.
    
         SLEPc is distributed under a 2-clause BSD license (see LICENSE).
    
         - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    
      */
    
      static char help[] = "Test RSVD on a low-rank matrix.\n\n";
    
      #include <slepcsvd.h>
    
      10
      int main(int argc,char **argv)
    
      {
    
      10
        Mat            A,Ur,Vr;
    
      10
        SVD            svd;
    
      10
        PetscInt       m=80,n=40,rank=3,Istart,Iend,i,j;
    
      10
        PetscScalar    *u;
    
      10
        PetscReal      tol=PETSC_SMALL;
    
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      10
        PetscFunctionBeginUser;
    
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      10
        PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
    
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      10
        PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
    
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      10
        PetscCall(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL));
    
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      10
        PetscCall(PetscOptionsGetInt(NULL,NULL,"-rank",&rank,NULL));
    
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      10
        PetscCheck(rank>0,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"The rank must be >=1");
    
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      10
        PetscCheck(rank<PetscMin(m,n),PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"The rank must be <min(m,n)");
    
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      10
        PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nSVD of low-rank matrix, size %" PetscInt_FMT "x%" PetscInt_FMT ", rank %" PetscInt_FMT "\n\n",m,n,rank));
    
        /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    
                        Create a low-rank matrix A = Ur*Vr'
    
           - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
    
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      10
        PetscCall(MatCreate(PETSC_COMM_WORLD,&Ur));
    
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      10
        PetscCall(MatSetSizes(Ur,PETSC_DECIDE,PETSC_DECIDE,m,rank));
    
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      10
        PetscCall(MatSetType(Ur,MATDENSE));
    
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      10
        PetscCall(MatGetOwnershipRange(Ur,&Istart,&Iend));
    
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      10
        PetscCall(MatDenseGetArray(Ur,&u));
    
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      810
        for (i=Istart;i<Iend;i++) {
    
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      800
          if (i<m/2) u[i-Istart] = 1.0;
    
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      800
          if (i==0) u[i+Iend-2*Istart] = -2.0;
    
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      800
          if (i==1) u[i+Iend-2*Istart] = -1.0;
    
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      800
          if (i==2) u[i+Iend-2*Istart] = -1.0;
    
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      1600
          for (j=2;j<rank;j++) if (i==j) u[j+j*Iend-(j+1)*Istart] = j;
    
        }
    
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      10
        PetscCall(MatDenseRestoreArray(Ur,&u));
    
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      10
        PetscCall(MatAssemblyBegin(Ur,MAT_FINAL_ASSEMBLY));
    
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      10
        PetscCall(MatAssemblyEnd(Ur,MAT_FINAL_ASSEMBLY));
    
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      10
        PetscCall(MatCreate(PETSC_COMM_WORLD,&Vr));
    
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      10
        PetscCall(MatSetSizes(Vr,PETSC_DECIDE,PETSC_DECIDE,n,rank));
    
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      10
        PetscCall(MatSetType(Vr,MATDENSE));
    
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      10
        PetscCall(MatGetOwnershipRange(Vr,&Istart,&Iend));
    
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      10
        PetscCall(MatDenseGetArray(Vr,&u));
    
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      410
        for (i=Istart;i<Iend;i++) {
    
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      400
          if (i>n/2) u[i-Istart] = 1.0;
    
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      400
          if (i==0) u[i+Iend-2*Istart] = 1.0;
    
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      400
          if (i==1) u[i+Iend-2*Istart] = 2.0;
    
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      400
          if (i==2) u[i+Iend-2*Istart] = 2.0;
    
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      800
          for (j=2;j<rank;j++) if (i==j) u[j+j*Iend-(j+1)*Istart] = j;
    
        }
    
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      10
        PetscCall(MatDenseRestoreArray(Vr,&u));
    
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      10
        PetscCall(MatAssemblyBegin(Vr,MAT_FINAL_ASSEMBLY));
    
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      10
        PetscCall(MatAssemblyEnd(Vr,MAT_FINAL_ASSEMBLY));
    
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      10
        PetscCall(MatCreateLRC(NULL,Ur,NULL,Vr,&A));
    
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      10
        PetscCall(MatDestroy(&Ur));
    
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      10
        PetscCall(MatDestroy(&Vr));
    
        /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    
                           Create the SVD solver
    
           - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
    
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      10
        PetscCall(SVDCreate(PETSC_COMM_WORLD,&svd));
    
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      10
        PetscCall(SVDSetOperators(svd,A,NULL));
    
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      10
        PetscCall(SVDSetType(svd,SVDRANDOMIZED));
    
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      10
        PetscCall(SVDSetDimensions(svd,2,PETSC_DETERMINE,PETSC_DETERMINE));
    
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      10
        PetscCall(SVDSetConvergenceTest(svd,SVD_CONV_MAXIT));
    
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      10
        PetscCall(SVDSetTolerances(svd,tol,1));   /* maxit=1 to disable outer iteration */
    
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      10
        PetscCall(SVDSetFromOptions(svd));
    
        /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    
                      Compute the singular triplets and display solution
    
           - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
    
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      10
        PetscCall(SVDSolve(svd));
    
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      10
        PetscCall(SVDErrorView(svd,SVD_ERROR_RELATIVE,NULL));
    
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      10
        PetscCall(SVDDestroy(&svd));
    
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      10
        PetscCall(MatDestroy(&A));
    
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      10
        PetscCall(SlepcFinalize());
    
        return 0;
    
      }
    
      /*TEST
    
         test:
    
            args: -bv_orthog_block tsqr # currently fail with other block orthogonalization methods
    
            requires: !single
    
      TEST*/

Line	Branch	Exec	Source
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 RSVD on a low-rank matrix.\n\n";
12
13			#include <slepcsvd.h>
14
15		10	int main(int argc,char **argv)
16			{
17		10	Mat A,Ur,Vr;
18		10	SVD svd;
19		10	PetscInt m=80,n=40,rank=3,Istart,Iend,i,j;
20		10	PetscScalar *u;
21		10	PetscReal tol=PETSC_SMALL;
22
23	1/2 ✓ Branch 0 taken 2 times. ✗ Branch 1 not taken.	10	PetscFunctionBeginUser;
24	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
25
26	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
27	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL));
28	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(PetscOptionsGetInt(NULL,NULL,"-rank",&rank,NULL));
29	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	10	PetscCheck(rank>0,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"The rank must be >=1");
30	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 10 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	10	PetscCheck(rank<PetscMin(m,n),PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"The rank must be <min(m,n)");
31	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nSVD of low-rank matrix, size %" PetscInt_FMT "x%" PetscInt_FMT ", rank %" PetscInt_FMT "\n\n",m,n,rank));
32
33			/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
34			Create a low-rank matrix A = Ur*Vr'
35			- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
36
37	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatCreate(PETSC_COMM_WORLD,&Ur));
38	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatSetSizes(Ur,PETSC_DECIDE,PETSC_DECIDE,m,rank));
39	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatSetType(Ur,MATDENSE));
40	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatGetOwnershipRange(Ur,&Istart,&Iend));
41	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatDenseGetArray(Ur,&u));
42	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	810	for (i=Istart;i<Iend;i++) {
43	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	800	if (i<m/2) u[i-Istart] = 1.0;
44	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	800	if (i==0) u[i+Iend-2*Istart] = -2.0;
45	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	800	if (i==1) u[i+Iend-2*Istart] = -1.0;
46	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	800	if (i==2) u[i+Iend-2*Istart] = -1.0;
47	4/4 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 10 times. ✓ Branch 3 taken 10 times.	1600	for (j=2;j<rank;j++) if (i==j) u[j+jIend-(j+1)Istart] = j;
48			}
49	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatDenseRestoreArray(Ur,&u));
50	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatAssemblyBegin(Ur,MAT_FINAL_ASSEMBLY));
51	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatAssemblyEnd(Ur,MAT_FINAL_ASSEMBLY));
52	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatCreate(PETSC_COMM_WORLD,&Vr));
53	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatSetSizes(Vr,PETSC_DECIDE,PETSC_DECIDE,n,rank));
54	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatSetType(Vr,MATDENSE));
55	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatGetOwnershipRange(Vr,&Istart,&Iend));
56	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatDenseGetArray(Vr,&u));
57	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	410	for (i=Istart;i<Iend;i++) {
58	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	400	if (i>n/2) u[i-Istart] = 1.0;
59	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	400	if (i==0) u[i+Iend-2*Istart] = 1.0;
60	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	400	if (i==1) u[i+Iend-2*Istart] = 2.0;
61	2/2 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times.	400	if (i==2) u[i+Iend-2*Istart] = 2.0;
62	4/4 ✓ Branch 0 taken 10 times. ✓ Branch 1 taken 10 times. ✓ Branch 2 taken 10 times. ✓ Branch 3 taken 10 times.	800	for (j=2;j<rank;j++) if (i==j) u[j+jIend-(j+1)Istart] = j;
63			}
64	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatDenseRestoreArray(Vr,&u));
65	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatAssemblyBegin(Vr,MAT_FINAL_ASSEMBLY));
66	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatAssemblyEnd(Vr,MAT_FINAL_ASSEMBLY));
67	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatCreateLRC(NULL,Ur,NULL,Vr,&A));
68	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatDestroy(&Ur));
69	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatDestroy(&Vr));
70
71			/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
72			Create the SVD solver
73			- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
74
75	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDCreate(PETSC_COMM_WORLD,&svd));
76	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDSetOperators(svd,A,NULL));
77	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDSetType(svd,SVDRANDOMIZED));
78	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDSetDimensions(svd,2,PETSC_DETERMINE,PETSC_DETERMINE));
79	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDSetConvergenceTest(svd,SVD_CONV_MAXIT));
80	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDSetTolerances(svd,tol,1)); /* maxit=1 to disable outer iteration */
81	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDSetFromOptions(svd));
82
83			/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
84			Compute the singular triplets and display solution
85			- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
86
87	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDSolve(svd));
88	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDErrorView(svd,SVD_ERROR_RELATIVE,NULL));
89	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(SVDDestroy(&svd));
90	4/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 8 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✓ Branch 5 taken 2 times.	10	PetscCall(MatDestroy(&A));
91	3/6 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times. ✓ Branch 2 taken 2 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✗ Branch 5 not taken.	10	PetscCall(SlepcFinalize());
92			return 0;
93			}
94
95			/*TEST
96
97			test:
98			args: -bv_orthog_block tsqr # currently fail with other block orthogonalization methods
99			requires: !single
100
101			TEST*/
102