Actual source code: test4.c
slepc-3.21.2 2024-09-25
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;
26: PetscFunctionBeginUser;
27: PetscCall(SlepcInitialize(&argc,&argv,(char*)0,help));
28: PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
29: PetscCall(PetscOptionsGetInt(NULL,NULL,"-kx",&kx,NULL));
30: PetscCall(PetscOptionsGetInt(NULL,NULL,"-lx",&lx,NULL));
31: PetscCall(PetscOptionsGetInt(NULL,NULL,"-ky",&ky,NULL));
32: PetscCall(PetscOptionsGetInt(NULL,NULL,"-ly",&ly,NULL));
33: PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
34: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"First BV with %" PetscInt_FMT " active columns (%" PetscInt_FMT " leading columns) of dimension %" PetscInt_FMT ".\n",kx,lx,n));
35: PetscCall(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: PetscCall(VecCreate(PETSC_COMM_WORLD,&t));
39: PetscCall(VecSetSizes(t,PETSC_DECIDE,n));
40: PetscCall(VecSetFromOptions(t));
42: /* Create BV object X */
43: PetscCall(BVCreate(PETSC_COMM_WORLD,&X));
44: PetscCall(PetscObjectSetName((PetscObject)X,"X"));
45: PetscCall(BVSetSizesFromVec(X,t,kx+2)); /* two extra columns to test active columns */
46: PetscCall(BVSetFromOptions(X));
47: PetscCall(BVSetActiveColumns(X,lx,kx));
49: /* Set up viewer */
50: PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view));
51: if (verbose) PetscCall(PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB));
53: /* Fill X entries */
54: for (j=0;j<kx+2;j++) {
55: PetscCall(BVGetColumn(X,j,&v));
56: PetscCall(VecSet(v,0.0));
57: for (i=0;i<4;i++) {
58: if (i+j<n) PetscCall(VecSetValue(v,i+j,(PetscScalar)(3*i+j-2),INSERT_VALUES));
59: }
60: PetscCall(VecAssemblyBegin(v));
61: PetscCall(VecAssemblyEnd(v));
62: PetscCall(BVRestoreColumn(X,j,&v));
63: }
64: if (verbose) PetscCall(BVView(X,view));
66: /* Create BV object Y */
67: PetscCall(BVCreate(PETSC_COMM_WORLD,&Y));
68: PetscCall(PetscObjectSetName((PetscObject)Y,"Y"));
69: PetscCall(BVSetSizesFromVec(Y,t,ky+1));
70: PetscCall(BVSetFromOptions(Y));
71: PetscCall(BVSetActiveColumns(Y,ly,ky));
73: /* Fill Y entries */
74: for (j=0;j<ky+1;j++) {
75: PetscCall(BVGetColumn(Y,j,&v));
76: PetscCall(VecSet(v,(PetscScalar)(j+1)/4.0));
77: PetscCall(BVRestoreColumn(Y,j,&v));
78: }
79: if (verbose) PetscCall(BVView(Y,view));
81: /* Create Mat */
82: PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,kx,ky,NULL,&Q));
83: PetscCall(PetscObjectSetName((PetscObject)Q,"Q"));
84: PetscCall(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: PetscCall(MatDenseRestoreArray(Q,&q));
89: if (verbose) PetscCall(MatView(Q,NULL));
91: /* Test BVResize */
92: PetscCall(BVResize(X,kx+4,PETSC_TRUE));
94: /* Test BVMult */
95: PetscCall(BVMult(Y,2.0,0.5,X,Q));
96: if (verbose) {
97: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After BVMult - - - - - - - - -\n"));
98: PetscCall(BVView(Y,view));
99: }
101: /* Test BVMultVec */
102: PetscCall(BVGetColumn(Y,0,&v));
103: PetscCall(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: PetscCall(BVMultVec(X,-1.0,1.0,v,z));
107: PetscCall(PetscFree(z));
108: PetscCall(BVRestoreColumn(Y,0,&v));
109: if (verbose) {
110: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After BVMultVec - - - - - - -\n"));
111: PetscCall(BVView(Y,view));
112: }
114: /* Test BVDot */
115: PetscCall(MatCreateSeqDense(PETSC_COMM_SELF,ky,kx,NULL,&M));
116: PetscCall(PetscObjectSetName((PetscObject)M,"M"));
117: PetscCall(BVDot(X,Y,M));
118: if (verbose) {
119: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After BVDot - - - - - - - - -\n"));
120: PetscCall(MatView(M,NULL));
121: }
123: /* Test BVDotVec */
124: PetscCall(BVGetColumn(Y,0,&v));
125: PetscCall(PetscMalloc1(kx-lx,&z));
126: PetscCall(BVDotVec(X,v,z));
127: PetscCall(BVRestoreColumn(Y,0,&v));
128: if (verbose) {
129: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After BVDotVec - - - - - - -\n"));
130: PetscCall(VecCreateSeqWithArray(PETSC_COMM_SELF,1,kx-lx,z,&v));
131: PetscCall(PetscObjectSetName((PetscObject)v,"z"));
132: PetscCall(VecView(v,view));
133: PetscCall(VecDestroy(&v));
134: }
135: PetscCall(PetscFree(z));
137: /* Test BVMultInPlace and BVScale */
138: PetscCall(PetscOptionsHasName(NULL,NULL,"-trans",&trans));
139: if (trans) {
140: Mat Qt;
141: PetscCall(MatTranspose(Q,MAT_INITIAL_MATRIX,&Qt));
142: PetscCall(BVMultInPlaceHermitianTranspose(X,Qt,lx+1,ky));
143: PetscCall(MatDestroy(&Qt));
144: } else PetscCall(BVMultInPlace(X,Q,lx+1,ky));
145: PetscCall(BVScale(X,2.0));
146: if (verbose) {
147: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After BVMultInPlace - - - - -\n"));
148: PetscCall(BVView(X,view));
149: }
151: /* Test BVNorm */
152: PetscCall(BVNormColumn(X,lx,NORM_2,&nrm));
153: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"2-Norm of X[%" PetscInt_FMT "] = %g\n",lx,(double)nrm));
154: PetscCall(BVNorm(X,NORM_FROBENIUS,&nrm));
155: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Frobenius Norm of X = %g\n",(double)nrm));
157: PetscCall(BVDestroy(&X));
158: PetscCall(BVDestroy(&Y));
159: PetscCall(MatDestroy(&Q));
160: PetscCall(MatDestroy(&M));
161: PetscCall(VecDestroy(&t));
162: PetscCall(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 mat}} -vec_type cuda
180: requires: cuda
181: test:
182: suffix: 2
183: args: -bv_type {{vecs contiguous svec mat}shared output} -trans
185: TEST*/