Actual source code: test4.c
slepc-3.18.3 2023-03-24
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, changing the number of active columns.\n\n";
13: #include <slepcbv.h>
15: int main(int argc,char **argv)
16: {
17: Vec t,v;
18: Mat Q,M;
19: BV X,Y;
20: PetscInt i,j,n=10,kx=6,lx=3,ky=5,ly=2;
21: PetscScalar *q,*z;
22: PetscReal nrm;
23: PetscViewer view;
24: PetscBool verbose,trans;
27: SlepcInitialize(&argc,&argv,(char*)0,help);
28: PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
29: PetscOptionsGetInt(NULL,NULL,"-kx",&kx,NULL);
30: PetscOptionsGetInt(NULL,NULL,"-lx",&lx,NULL);
31: PetscOptionsGetInt(NULL,NULL,"-ky",&ky,NULL);
32: PetscOptionsGetInt(NULL,NULL,"-ly",&ly,NULL);
33: PetscOptionsHasName(NULL,NULL,"-verbose",&verbose);
34: PetscPrintf(PETSC_COMM_WORLD,"First BV with %" PetscInt_FMT " active columns (%" PetscInt_FMT " leading columns) of dimension %" PetscInt_FMT ".\n",kx,lx,n);
35: PetscPrintf(PETSC_COMM_WORLD,"Second BV with %" PetscInt_FMT " active columns (%" PetscInt_FMT " leading columns) of dimension %" PetscInt_FMT ".\n",ky,ly,n);
37: /* Create template vector */
38: VecCreate(PETSC_COMM_WORLD,&t);
39: VecSetSizes(t,PETSC_DECIDE,n);
40: VecSetFromOptions(t);
42: /* Create BV object X */
43: BVCreate(PETSC_COMM_WORLD,&X);
44: PetscObjectSetName((PetscObject)X,"X");
45: BVSetSizesFromVec(X,t,kx+2); /* two extra columns to test active columns */
46: BVSetFromOptions(X);
47: BVSetActiveColumns(X,lx,kx);
49: /* Set up viewer */
50: PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view);
51: if (verbose) PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB);
53: /* Fill X entries */
54: for (j=0;j<kx+2;j++) {
55: BVGetColumn(X,j,&v);
56: VecSet(v,0.0);
57: for (i=0;i<4;i++) {
58: if (i+j<n) VecSetValue(v,i+j,(PetscScalar)(3*i+j-2),INSERT_VALUES);
59: }
60: VecAssemblyBegin(v);
61: VecAssemblyEnd(v);
62: BVRestoreColumn(X,j,&v);
63: }
64: if (verbose) BVView(X,view);
66: /* Create BV object Y */
67: BVCreate(PETSC_COMM_WORLD,&Y);
68: PetscObjectSetName((PetscObject)Y,"Y");
69: BVSetSizesFromVec(Y,t,ky+1);
70: BVSetFromOptions(Y);
71: BVSetActiveColumns(Y,ly,ky);
73: /* Fill Y entries */
74: for (j=0;j<ky+1;j++) {
75: BVGetColumn(Y,j,&v);
76: VecSet(v,(PetscScalar)(j+1)/4.0);
77: BVRestoreColumn(Y,j,&v);
78: }
79: if (verbose) BVView(Y,view);
81: /* Create Mat */
82: MatCreateSeqDense(PETSC_COMM_SELF,kx,ky,NULL,&Q);
83: PetscObjectSetName((PetscObject)Q,"Q");
84: MatDenseGetArray(Q,&q);
85: for (i=0;i<kx;i++)
86: for (j=0;j<ky;j++)
87: q[i+j*kx] = (i<j)? 2.0: -0.5;
88: MatDenseRestoreArray(Q,&q);
89: if (verbose) MatView(Q,NULL);
91: /* Test BVResize */
92: BVResize(X,kx+4,PETSC_TRUE);
94: /* Test BVMult */
95: BVMult(Y,2.0,0.5,X,Q);
96: if (verbose) {
97: PetscPrintf(PETSC_COMM_WORLD,"After BVMult - - - - - - - - -\n");
98: BVView(Y,view);
99: }
101: /* Test BVMultVec */
102: BVGetColumn(Y,0,&v);
103: PetscMalloc1(kx-lx,&z);
104: z[0] = 2.0;
105: for (i=1;i<kx-lx;i++) z[i] = -0.5*z[i-1];
106: BVMultVec(X,-1.0,1.0,v,z);
107: PetscFree(z);
108: BVRestoreColumn(Y,0,&v);
109: if (verbose) {
110: PetscPrintf(PETSC_COMM_WORLD,"After BVMultVec - - - - - - -\n");
111: BVView(Y,view);
112: }
114: /* Test BVDot */
115: MatCreateSeqDense(PETSC_COMM_SELF,ky,kx,NULL,&M);
116: PetscObjectSetName((PetscObject)M,"M");
117: BVDot(X,Y,M);
118: if (verbose) {
119: PetscPrintf(PETSC_COMM_WORLD,"After BVDot - - - - - - - - -\n");
120: MatView(M,NULL);
121: }
123: /* Test BVDotVec */
124: BVGetColumn(Y,0,&v);
125: PetscMalloc1(kx-lx,&z);
126: BVDotVec(X,v,z);
127: BVRestoreColumn(Y,0,&v);
128: if (verbose) {
129: PetscPrintf(PETSC_COMM_WORLD,"After BVDotVec - - - - - - -\n");
130: VecCreateSeqWithArray(PETSC_COMM_SELF,1,kx-lx,z,&v);
131: PetscObjectSetName((PetscObject)v,"z");
132: VecView(v,view);
133: VecDestroy(&v);
134: }
135: PetscFree(z);
137: /* Test BVMultInPlace and BVScale */
138: PetscOptionsHasName(NULL,NULL,"-trans",&trans);
139: if (trans) {
140: Mat Qt;
141: MatTranspose(Q,MAT_INITIAL_MATRIX,&Qt);
142: BVMultInPlaceHermitianTranspose(X,Qt,lx+1,ky);
143: MatDestroy(&Qt);
144: } else BVMultInPlace(X,Q,lx+1,ky);
145: BVScale(X,2.0);
146: if (verbose) {
147: PetscPrintf(PETSC_COMM_WORLD,"After BVMultInPlace - - - - -\n");
148: BVView(X,view);
149: }
151: /* Test BVNorm */
152: BVNormColumn(X,lx,NORM_2,&nrm);
153: PetscPrintf(PETSC_COMM_WORLD,"2-Norm of X[%" PetscInt_FMT "] = %g\n",lx,(double)nrm);
154: BVNorm(X,NORM_FROBENIUS,&nrm);
155: PetscPrintf(PETSC_COMM_WORLD,"Frobenius Norm of X = %g\n",(double)nrm);
157: BVDestroy(&X);
158: BVDestroy(&Y);
159: MatDestroy(&Q);
160: MatDestroy(&M);
161: VecDestroy(&t);
162: SlepcFinalize();
163: return 0;
164: }
166: /*TEST
168: testset:
169: output_file: output/test4_1.out
170: args: -n 18 -kx 12 -ky 8
171: test:
172: suffix: 1
173: args: -bv_type {{vecs contiguous svec mat}shared output}
174: test:
175: suffix: 1_vecs_vmip
176: args: -bv_type vecs -bv_vecs_vmip 1
177: test:
178: suffix: 1_cuda
179: args: -bv_type svec -vec_type cuda
180: requires: cuda
181: test:
182: suffix: 2
183: args: -bv_type {{vecs contiguous svec mat}shared output} -trans
185: TEST*/