Actual source code: test13.c
slepc-3.18.1 2022-11-02
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;
25: SlepcInitialize(&argc,&argv,(char*)0,help);
26: PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
27: PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL);
28: PetscOptionsGetInt(NULL,NULL,"-l",&l,NULL);
29: PetscOptionsHasName(NULL,NULL,"-verbose",&verbose);
30: PetscPrintf(PETSC_COMM_WORLD,"Test BV with %" PetscInt_FMT " columns of dimension %" PetscInt_FMT ".\n",k,n);
32: /* Create template vector */
33: VecCreate(PETSC_COMM_WORLD,&t);
34: VecSetSizes(t,PETSC_DECIDE,n);
35: VecSetFromOptions(t);
37: /* Create BV object X */
38: BVCreate(PETSC_COMM_WORLD,&X);
39: PetscObjectSetName((PetscObject)X,"X");
40: BVSetSizesFromVec(X,t,k);
41: BVSetFromOptions(X);
43: /* Set up viewer */
44: PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view);
45: if (verbose) PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB);
47: /* Fill X entries */
48: for (j=0;j<k;j++) {
49: BVGetColumn(X,j,&v);
50: VecSet(v,0.0);
51: for (i=0;i<4;i++) {
52: if (i+j<n) VecSetValue(v,i+j,(PetscScalar)(3*i+j-2),INSERT_VALUES);
53: }
54: VecAssemblyBegin(v);
55: VecAssemblyEnd(v);
56: BVRestoreColumn(X,j,&v);
57: }
58: if (verbose) BVView(X,view);
60: /* Test BVDotColumn */
61: BVDotColumn(X,2,NULL);
62: if (verbose) {
63: PetscPrintf(PETSC_COMM_WORLD,"After BVDotColumn - - - - - - -\n");
64: BVGetBufferVec(X,&z);
65: VecView(z,view);
66: }
67: /* Test BVMultColumn */
68: BVMultColumn(X,-1.0,1.0,2,NULL);
69: if (verbose) {
70: PetscPrintf(PETSC_COMM_WORLD,"After BVMultColumn - - - - - - - - -\n");
71: BVView(X,view);
72: }
74: BVNorm(X,NORM_FROBENIUS,&nrm);
75: PetscPrintf(PETSC_COMM_WORLD,"Frobenius Norm or X = %g\n",(double)nrm);
77: BVDestroy(&X);
78: VecDestroy(&t);
79: 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 -vec_type cuda
93: requires: cuda
95: TEST*/