Actual source code: test4.c
slepc-3.11.2 2019-07-30
1: /*
2: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3: SLEPc - Scalable Library for Eigenvalue Problem Computations
4: Copyright (c) 2002-2019, 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: {
18: Vec t,v;
19: Mat Q,M;
20: BV X,Y;
21: PetscInt i,j,n=10,kx=6,lx=3,ky=5,ly=2;
22: PetscScalar *q,*z;
23: PetscReal nrm;
24: PetscViewer view;
25: PetscBool verbose,trans;
27: SlepcInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
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 %D active columns (%D leading columns) of dimension %D.\n",kx,lx,n);
35: PetscPrintf(PETSC_COMM_WORLD,"Second BV with %D active columns (%D leading columns) of dimension %D.\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) {
52: PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB);
53: }
55: /* Fill X entries */
56: for (j=0;j<kx+2;j++) {
57: BVGetColumn(X,j,&v);
58: VecSet(v,0.0);
59: for (i=0;i<4;i++) {
60: if (i+j<n) {
61: VecSetValue(v,i+j,(PetscScalar)(3*i+j-2),INSERT_VALUES);
62: }
63: }
64: VecAssemblyBegin(v);
65: VecAssemblyEnd(v);
66: BVRestoreColumn(X,j,&v);
67: }
68: if (verbose) {
69: BVView(X,view);
70: }
72: /* Create BV object Y */
73: BVCreate(PETSC_COMM_WORLD,&Y);
74: PetscObjectSetName((PetscObject)Y,"Y");
75: BVSetSizesFromVec(Y,t,ky+1);
76: BVSetFromOptions(Y);
77: BVSetActiveColumns(Y,ly,ky);
79: /* Fill Y entries */
80: for (j=0;j<ky+1;j++) {
81: BVGetColumn(Y,j,&v);
82: VecSet(v,(PetscScalar)(j+1)/4.0);
83: BVRestoreColumn(Y,j,&v);
84: }
85: if (verbose) {
86: BVView(Y,view);
87: }
89: /* Create Mat */
90: MatCreateSeqDense(PETSC_COMM_SELF,kx,ky,NULL,&Q);
91: PetscObjectSetName((PetscObject)Q,"Q");
92: MatDenseGetArray(Q,&q);
93: for (i=0;i<kx;i++)
94: for (j=0;j<ky;j++)
95: q[i+j*kx] = (i<j)? 2.0: -0.5;
96: MatDenseRestoreArray(Q,&q);
97: if (verbose) {
98: MatView(Q,NULL);
99: }
101: /* Test BVResize */
102: BVResize(X,kx+4,PETSC_TRUE);
104: /* Test BVMult */
105: BVMult(Y,2.0,0.5,X,Q);
106: if (verbose) {
107: PetscPrintf(PETSC_COMM_WORLD,"After BVMult - - - - - - - - -\n");
108: BVView(Y,view);
109: }
111: /* Test BVMultVec */
112: BVGetColumn(Y,0,&v);
113: PetscMalloc1(kx-lx,&z);
114: z[0] = 2.0;
115: for (i=1;i<kx-lx;i++) z[i] = -0.5*z[i-1];
116: BVMultVec(X,-1.0,1.0,v,z);
117: PetscFree(z);
118: BVRestoreColumn(Y,0,&v);
119: if (verbose) {
120: PetscPrintf(PETSC_COMM_WORLD,"After BVMultVec - - - - - - -\n");
121: BVView(Y,view);
122: }
124: /* Test BVDot */
125: MatCreateSeqDense(PETSC_COMM_SELF,ky,kx,NULL,&M);
126: PetscObjectSetName((PetscObject)M,"M");
127: BVDot(X,Y,M);
128: if (verbose) {
129: PetscPrintf(PETSC_COMM_WORLD,"After BVDot - - - - - - - - -\n");
130: MatView(M,NULL);
131: }
133: /* Test BVDotVec */
134: BVGetColumn(Y,0,&v);
135: PetscMalloc1(kx-lx,&z);
136: BVDotVec(X,v,z);
137: BVRestoreColumn(Y,0,&v);
138: if (verbose) {
139: PetscPrintf(PETSC_COMM_WORLD,"After BVDotVec - - - - - - -\n");
140: VecCreateSeqWithArray(PETSC_COMM_SELF,1,kx-lx,z,&v);
141: PetscObjectSetName((PetscObject)v,"z");
142: VecView(v,view);
143: VecDestroy(&v);
144: }
145: PetscFree(z);
147: /* Test BVMultInPlace and BVScale */
148: PetscOptionsHasName(NULL,NULL,"-trans",&trans);
149: if (trans) {
150: Mat Qt;
151: MatTranspose(Q,MAT_INITIAL_MATRIX,&Qt);
152: BVMultInPlaceTranspose(X,Qt,lx+1,ky);
153: MatDestroy(&Qt);
154: } else {
155: BVMultInPlace(X,Q,lx+1,ky);
156: }
157: BVScale(X,2.0);
158: if (verbose) {
159: PetscPrintf(PETSC_COMM_WORLD,"After BVMultInPlace - - - - -\n");
160: BVView(X,view);
161: }
163: /* Test BVNorm */
164: BVNormColumn(X,lx,NORM_2,&nrm);
165: PetscPrintf(PETSC_COMM_WORLD,"2-Norm of X[%D] = %g\n",lx,(double)nrm);
166: BVNorm(X,NORM_FROBENIUS,&nrm);
167: PetscPrintf(PETSC_COMM_WORLD,"Frobenius Norm of X = %g\n",(double)nrm);
169: BVDestroy(&X);
170: BVDestroy(&Y);
171: MatDestroy(&Q);
172: MatDestroy(&M);
173: VecDestroy(&t);
174: SlepcFinalize();
175: return ierr;
176: }
178: /*TEST
180: test:
181: suffix: 1
182: nsize: 1
183: args: -n 18 -kx 12 -ky 8 -bv_type {{vecs contiguous svec mat}shared output}
184: output_file: output/test4_1.out
186: test:
187: suffix: 1_vecs_vmip
188: nsize: 1
189: args: -n 18 -kx 12 -ky 8 -bv_type vecs -bv_vecs_vmip 1
190: output_file: output/test4_1.out
192: test:
193: suffix: 1_cuda
194: nsize: 1
195: args: -n 18 -kx 12 -ky 8 -bv_type svec -vec_type cuda
196: requires: cuda
197: output_file: output/test4_1.out
199: test:
200: suffix: 2
201: nsize: 1
202: args: -n 18 -kx 12 -ky 8 -bv_type {{vecs contiguous svec mat}shared output} -trans
203: output_file: output/test4_1.out
205: TEST*/