Actual source code: test3.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 with non-standard inner product.\n\n";
13: #include <slepcbv.h>
15: int main(int argc,char **argv)
16: {
17: Vec t,v;
18: Mat B,M;
19: BV X;
20: PetscInt i,j,n=10,k=5,Istart,Iend;
21: PetscScalar alpha;
22: PetscReal nrm;
23: PetscViewer view;
24: PetscBool verbose;
27: SlepcInitialize(&argc,&argv,(char*)0,help);
28: PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
29: PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL);
30: PetscOptionsHasName(NULL,NULL,"-verbose",&verbose);
31: PetscPrintf(PETSC_COMM_WORLD,"Test BV with non-standard inner product (n=%" PetscInt_FMT ", k=%" PetscInt_FMT ").\n",n,k);
33: /* Create inner product matrix */
34: MatCreate(PETSC_COMM_WORLD,&B);
35: MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,n,n);
36: MatSetFromOptions(B);
37: MatSetUp(B);
38: PetscObjectSetName((PetscObject)B,"B");
40: MatGetOwnershipRange(B,&Istart,&Iend);
41: for (i=Istart;i<Iend;i++) {
42: if (i>0) MatSetValue(B,i,i-1,-1.0,INSERT_VALUES);
43: if (i<n-1) MatSetValue(B,i,i+1,-1.0,INSERT_VALUES);
44: MatSetValue(B,i,i,2.0,INSERT_VALUES);
45: }
46: MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);
47: MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);
48: MatCreateVecs(B,&t,NULL);
50: /* Create BV object X */
51: BVCreate(PETSC_COMM_WORLD,&X);
52: PetscObjectSetName((PetscObject)X,"X");
53: BVSetSizesFromVec(X,t,k);
54: BVSetFromOptions(X);
55: BVSetMatrix(X,B,PETSC_FALSE);
57: /* Set up viewer */
58: PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view);
59: if (verbose) PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB);
61: /* Fill X entries */
62: for (j=0;j<k;j++) {
63: BVGetColumn(X,j,&v);
64: VecSet(v,0.0);
65: for (i=0;i<4;i++) {
66: if (i+j<n) VecSetValue(v,i+j,(PetscScalar)(3*i+j-2),INSERT_VALUES);
67: }
68: VecAssemblyBegin(v);
69: VecAssemblyEnd(v);
70: BVRestoreColumn(X,j,&v);
71: }
72: if (verbose) {
73: MatView(B,view);
74: BVView(X,view);
75: }
77: /* Test BVNormColumn */
78: BVNormColumn(X,0,NORM_2,&nrm);
79: PetscPrintf(PETSC_COMM_WORLD,"B-Norm of X[0] = %g\n",(double)nrm);
81: /* Test BVOrthogonalizeColumn */
82: for (j=0;j<k;j++) {
83: BVOrthogonalizeColumn(X,j,NULL,&nrm,NULL);
84: alpha = 1.0/nrm;
85: BVScaleColumn(X,j,alpha);
86: }
87: if (verbose) BVView(X,view);
89: /* Check orthogonality */
90: MatCreateSeqDense(PETSC_COMM_SELF,k,k,NULL,&M);
91: BVDot(X,X,M);
92: MatShift(M,-1.0);
93: MatNorm(M,NORM_1,&nrm);
94: if (nrm<100*PETSC_MACHINE_EPSILON) PetscPrintf(PETSC_COMM_WORLD,"Level of orthogonality < 100*eps\n");
95: else PetscPrintf(PETSC_COMM_WORLD,"Level of orthogonality: %g\n",(double)nrm);
97: /* Test BVNormVecBegin/End */
98: BVGetColumn(X,0,&v);
99: BVNormVecBegin(X,v,NORM_1,&nrm);
100: BVNormVecEnd(X,v,NORM_1,&nrm);
101: BVRestoreColumn(X,0,&v);
102: PetscPrintf(PETSC_COMM_WORLD,"B-Norm of X[0] = %g\n",(double)nrm);
104: BVDestroy(&X);
105: MatDestroy(&M);
106: MatDestroy(&B);
107: VecDestroy(&t);
108: SlepcFinalize();
109: return 0;
110: }
112: /*TEST
114: testset:
115: output_file: output/test3_1.out
116: test:
117: suffix: 1
118: args: -bv_type {{vecs contiguous svec mat}shared output}
119: test:
120: suffix: 1_svec_vecs
121: args: -bv_type svec -bv_matmult vecs
122: test:
123: suffix: 1_cuda
124: args: -bv_type svec -mat_type aijcusparse
125: requires: cuda
126: test:
127: suffix: 2
128: nsize: 2
129: args: -bv_type {{vecs contiguous svec mat}shared output}
130: test:
131: suffix: 3
132: nsize: 2
133: args: -bv_type {{vecs contiguous svec mat}shared output} -bv_orthog_type mgs
135: TEST*/