GCC Code Coverage Report

Directory: ./
File: src/svd/tutorials/ex48.c
Date: 2025-11-19 04:19:03
Exec Total Coverage
Lines: 82 86 95.3%
Functions: 1 1 100.0%
Branches: 251 406 61.8%
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[] = "Solves a GSVD problem with matrices loaded from a file.\n\n"
12 "The command line options are:\n"
13 " -f1 <filename>, PETSc binary file containing matrix A.\n"
14 " -f2 <filename>, PETSc binary file containing matrix B (optional). Instead of"
15 " a file it is possible to specify one of 'identity', 'bidiagonal' or 'tridiagonal'"
16 " -p <p>, in case B is not taken from a file.\n\n";
17
18 #include <slepcsvd.h>
19
20 127 int main(int argc,char **argv)
21 {
22 127 Mat A,B; /* matrices */
23 127 SVD svd; /* singular value problem solver context */
24 127 PetscInt i,m,n,p,Istart,Iend,col[3];
25 127 PetscScalar vals[3];
26 127 char filename[PETSC_MAX_PATH_LEN];
27 127 PetscViewer viewer;
28 127 PetscBool flg,terse;
29
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 127 PetscFunctionBeginUser;
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 127 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
32
33 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
34 Load matrices that define the generalized singular value problem
35 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
36
37
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 127 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nGeneralized singular value problem stored in file.\n\n"));
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 127 PetscCall(PetscOptionsGetString(NULL,NULL,"-f1",filename,sizeof(filename),&flg));
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 127 PetscCheck(flg,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Must indicate a file name for matrix A with the -f1 option");
40
41 #if defined(PETSC_USE_COMPLEX)
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 27 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Reading COMPLEX matrix from a binary file...\n"));
43 #else
44
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 100 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Reading REAL matrix from a binary file...\n"));
45 #endif
46
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 127 PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer));
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 127 PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
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 127 PetscCall(MatSetFromOptions(A));
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 127 PetscCall(MatLoad(A,viewer));
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 127 PetscCall(PetscViewerDestroy(&viewer));
51
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 127 PetscCall(MatGetSize(A,&m,&n));
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 127 PetscCall(PetscOptionsGetString(NULL,NULL,"-f2",filename,sizeof(filename),&flg));
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 127 PetscCheck(flg,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Must indicate a file name for matrix B with the -f2 option, or alternatively the strings 'identity', 'bidiagonal', or 'tridiagonal'");
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 127 PetscCall(PetscStrcmp(filename,"identity",&flg));
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 127 if (flg) {
58 46 p = n;
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 46 PetscCall(PetscOptionsGetInt(NULL,NULL,"-p",&p,&flg));
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 46 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Using B=I with p=%" PetscInt_FMT "\n\n",p));
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 46 PetscCall(MatCreate(PETSC_COMM_WORLD,&B));
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 46 PetscCall(MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,p,n));
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 46 PetscCall(MatSetFromOptions(B));
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 46 PetscCall(MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY));
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 46 PetscCall(MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY));
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 46 PetscCall(MatShift(B,1.0));
67 } else {
68
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 81 PetscCall(PetscStrcmp(filename,"bidiagonal",&flg));
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 81 if (flg) {
70 27 p = n+1;
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 27 PetscCall(PetscOptionsGetInt(NULL,NULL,"-p",&p,&flg));
72 27 vals[0]=-1; vals[1]=1;
73
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 27 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Using B=bidiag(1,-1) with p=%" PetscInt_FMT "\n\n",p));
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 27 PetscCall(MatCreate(PETSC_COMM_WORLD,&B));
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 27 PetscCall(MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,p,n));
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 27 PetscCall(MatSetFromOptions(B));
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 27 PetscCall(MatGetOwnershipRange(B,&Istart,&Iend));
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 8787 for (i=Istart;i<Iend;i++) {
79 8760 col[0]=i-1; col[1]=i;
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 8760 if (i==0) PetscCall(MatSetValue(B,i,col[1],vals[1],INSERT_VALUES));
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 8733 else if (i<n) PetscCall(MatSetValues(B,1,&i,2,col,vals,INSERT_VALUES));
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 8760 else if (i==n) PetscCall(MatSetValue(B,i,col[0],vals[0],INSERT_VALUES));
83 }
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 27 PetscCall(MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY));
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 27 PetscCall(MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY));
86 } else {
87
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 54 PetscCall(PetscStrcmp(filename,"tridiagonal",&flg));
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 54 if (flg) {
89 10 p = n-2;
90
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 10 PetscCall(PetscOptionsGetInt(NULL,NULL,"-p",&p,&flg));
91 10 vals[0]=-1; vals[1]=2; vals[2]=-1;
92
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 10 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Using B=tridiag(-1,2,-1) with p=%" PetscInt_FMT "\n\n",p));
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 10 PetscCall(MatCreate(PETSC_COMM_WORLD,&B));
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 10 PetscCall(MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,p,n));
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 10 PetscCall(MatSetFromOptions(B));
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 10 PetscCall(MatGetOwnershipRange(B,&Istart,&Iend));
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 1990 for (i=Istart;i<Iend;i++) {
98 1980 col[0]=i; col[1]=i+1; col[2]=i+2;
99
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 1980 PetscCall(MatSetValues(B,1,&i,3,col,vals,INSERT_VALUES));
100 }
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 10 PetscCall(MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY));
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 10 PetscCall(MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY));
103 } else { /* load file */
104
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 44 PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer));
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 44 PetscCall(MatCreate(PETSC_COMM_WORLD,&B));
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 44 PetscCall(MatSetFromOptions(B));
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 44 PetscCall(MatLoad(B,viewer));
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 44 PetscCall(PetscViewerDestroy(&viewer));
109 }
110 }
111 }
112
113 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
114 Create the singular value solver and set various options
115 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
116
117 /*
118 Create singular value solver context
119 */
120
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 127 PetscCall(SVDCreate(PETSC_COMM_WORLD,&svd));
121
122 /*
123 Set operators of GSVD problem
124 */
125
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 127 PetscCall(SVDSetOperators(svd,A,B));
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 127 PetscCall(SVDSetProblemType(svd,SVD_GENERALIZED));
127
128 /*
129 Set solver parameters at runtime
130 */
131
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 127 PetscCall(SVDSetFromOptions(svd));
132
133 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
134 Solve the problem and print solution
135 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
136
137
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 127 PetscCall(SVDSolve(svd));
138
139 /* show detailed info unless -terse option is given by user */
140
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 127 PetscCall(PetscOptionsHasName(NULL,NULL,"-terse",&terse));
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 127 if (terse) PetscCall(SVDErrorView(svd,SVD_ERROR_NORM,NULL));
142 else {
143 ✗ PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO_DETAIL));
144 ✗ PetscCall(SVDConvergedReasonView(svd,PETSC_VIEWER_STDOUT_WORLD));
145 ✗ PetscCall(SVDErrorView(svd,SVD_ERROR_NORM,PETSC_VIEWER_STDOUT_WORLD));
146 ✗ PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD));
147 }
148
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 127 PetscCall(SVDDestroy(&svd));
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 127 PetscCall(MatDestroy(&A));
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 127 PetscCall(MatDestroy(&B));
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 127 PetscCall(SlepcFinalize());
152 return 0;
153 }
154 /*TEST
155
156 testset:
157 requires: double !complex !defined(PETSC_USE_64BIT_INDICES)
158 args: -f1 ${SLEPC_DIR}/share/slepc/datafiles/matrices/bfw62a.petsc -f2 ${SLEPC_DIR}/share/slepc/datafiles/matrices/bfw62b.petsc -svd_nsv 3 -terse
159 output_file: output/ex48_1.out
160 test:
161 suffix: 1
162 args: -svd_type trlanczos -svd_trlanczos_explicitmatrix {{0 1}} -svd_trlanczos_scale 1e5 -svd_trlanczos_ksp_rtol 1e-15
163 test:
164 suffix: 1_spqr
165 args: -svd_type trlanczos -svd_trlanczos_explicitmatrix -svd_trlanczos_pc_type qr -svd_trlanczos_scale 1e5 -svd_trlanczos_oneside {{0 1}}
166 requires: suitesparse
167 test:
168 suffix: 1_autoscale
169 args: -svd_type trlanczos -svd_trlanczos_gbidiag {{lower upper}} -svd_trlanczos_scale -5 -svd_trlanczos_ksp_rtol 1e-16 -svd_trlanczos_oneside {{0 1}}
170 test:
171 suffix: 1_cross
172 args: -svd_type cross -svd_cross_explicitmatrix
173 test:
174 suffix: 1_cyclic
175 args: -svd_type cyclic -svd_cyclic_explicitmatrix
176
177 testset:
178 requires: double complex datafilespath !defined(PETSC_USE_64BIT_INDICES)
179 args: -f1 ${DATAFILESPATH}/matrices/complex/qc324.petsc -f2 bidiagonal -svd_nsv 3 -terse
180 output_file: output/ex48_2.out
181 filter: sed -e "s/30749/30748/"
182 timeoutfactor: 2
183 test:
184 suffix: 2
185 args: -svd_type trlanczos -svd_trlanczos_explicitmatrix {{0 1}} -svd_trlanczos_ksp_rtol 1e-10 -svd_trlanczos_scale 100
186 requires: !defined(PETSCTEST_VALGRIND)
187 test:
188 suffix: 2_spqr
189 args: -svd_type trlanczos -svd_trlanczos_explicitmatrix -svd_trlanczos_pc_type qr -svd_trlanczos_ksp_rtol 1e-10
190 requires: suitesparse
191 test:
192 suffix: 2_cross
193 args: -svd_type cross -svd_cross_explicitmatrix
194 test:
195 suffix: 2_cyclic
196 args: -svd_type cyclic -svd_cyclic_explicitmatrix
197
198 test:
199 requires: double complex datafilespath !defined(PETSC_USE_64BIT_INDICES) !defined(PETSCTEST_VALGRIND)
200 args: -f1 ${DATAFILESPATH}/matrices/complex/qc324.petsc -f2 bidiagonal -p 320 -svd_nsv 3 -svd_type trlanczos -svd_trlanczos_ksp_rtol 1e-14 -svd_trlanczos_scale 100 -terse
201 timeoutfactor: 2
202 suffix: 3
203
204 testset:
205 requires: double !complex !defined(PETSC_USE_64BIT_INDICES)
206 args: -f1 ${SLEPC_DIR}/share/slepc/datafiles/matrices/rdb200.petsc -f2 identity -svd_nsv 3 -svd_ncv 24 -svd_smallest -terse
207 output_file: output/ex48_4.out
208 test:
209 suffix: 4
210 args: -svd_type trlanczos
211 test:
212 suffix: 4_spqr
213 args: -svd_type trlanczos -svd_trlanczos_explicitmatrix -svd_trlanczos_pc_type qr
214 requires: suitesparse
215 test:
216 suffix: 4_cross
217 args: -svd_type cross -svd_cross_explicitmatrix
218 test:
219 suffix: 4_cross_implicit
220 args: -svd_type cross -svd_cross_eps_type lobpcg -svd_cross_st_ksp_type cg -svd_cross_st_pc_type jacobi -svd_max_it 1000
221 test:
222 suffix: 4_cyclic
223 args: -svd_type cyclic -svd_cyclic_explicitmatrix
224 test:
225 suffix: 4_hpddm
226 nsize: 4
227 args: -svd_type trlanczos -svd_trlanczos_explicitmatrix -svd_trlanczos_pc_type hpddm
228 args: -prefix_push svd_trlanczos_pc_hpddm_ -levels_1_st_share_sub_ksp -levels_1_eps_nev 10 -levels_1_eps_threshold_relative 0.005 -levels_1_pc_asm_type basic -define_subdomains -levels_1_pc_asm_sub_mat_type sbaij -levels_1_sub_pc_type cholesky -prefix_pop
229 requires: hpddm
230
231 testset:
232 args: -f1 ${SLEPC_DIR}/share/slepc/datafiles/matrices/rdb200.petsc -f2 identity -svd_threshold_relative 0.87 -terse
233 output_file: output/ex48_5.out
234 requires: double !complex !defined(PETSC_USE_64BIT_INDICES)
235 test:
236 suffix: 5
237 args: -svd_type trlanczos -svd_trlanczos_explicitmatrix -svd_trlanczos_scale 100 -svd_trlanczos_gbidiag {{lower upper single}}
238 test:
239 suffix: 5_cross
240 args: -svd_type cross -svd_cross_explicitmatrix
241
242 testset:
243 args: -f1 ${DATAFILESPATH}/matrices/complex/qc324.petsc -f2 bidiagonal -svd_threshold_relative 0.3 -svd_ncv 8 -svd_tol 1e-7 -terse
244 output_file: output/ex48_5_complex.out
245 requires: double complex datafilespath !defined(PETSC_USE_64BIT_INDICES)
246 test:
247 suffix: 5_complex
248 args: -svd_type trlanczos -svd_trlanczos_explicitmatrix -svd_trlanczos_scale 100 -svd_trlanczos_ksp_rtol 1e-6 -svd_trlanczos_gbidiag {{lower upper single}}
249 test:
250 suffix: 5_complex_cross
251 args: -svd_type cross -svd_cross_explicitmatrix
252
253 testset:
254 requires: double !complex !defined(PETSC_USE_64BIT_INDICES)
255 args: -f1 ${SLEPC_DIR}/share/slepc/datafiles/matrices/rdb200.petsc -f2 tridiagonal -svd_nsv 4 -svd_smallest -terse
256 output_file: output/ex48_6.out
257 test:
258 suffix: 6_cross
259 args: -svd_type cross -svd_cross_explicitmatrix
260 test:
261 suffix: 6_cyclic
262 args: -svd_type cyclic -svd_cyclic_explicitmatrix
263
264 TEST*/
265