Actual source code: ex23.c
petsc-3.5.0 2014-06-30
2: static char help[] = "Tests VecView()/VecLoad() for DMDA vectors (this tests DMDAGlobalToNatural()).\n\n";
4: #include <petscdm.h>
5: #include <petscdmda.h>
9: int main(int argc,char **argv)
10: {
11: PetscMPIInt size;
12: PetscInt N = 6,m=PETSC_DECIDE,n=PETSC_DECIDE,p=PETSC_DECIDE,M=8,dof=1,stencil_width=1,P=5,pt = 0,st = 0;
13: PetscErrorCode ierr;
14: PetscBool flg2,flg3;
15: DMBoundaryType bx = DM_BOUNDARY_NONE,by = DM_BOUNDARY_NONE,bz = DM_BOUNDARY_NONE;
16: DMDAStencilType stencil_type = DMDA_STENCIL_STAR;
17: DM da;
18: Vec global1,global2,global3,global4;
19: PetscScalar mone = -1.0;
20: PetscReal norm;
21: PetscViewer viewer;
22: PetscRandom rdm;
24: PetscInitialize(&argc,&argv,(char*)0,help);
26: PetscOptionsGetInt(NULL,"-M",&M,NULL);
27: PetscOptionsGetInt(NULL,"-N",&N,NULL);
28: PetscOptionsGetInt(NULL,"-P",&P,NULL);
29: PetscOptionsGetInt(NULL,"-dof",&dof,NULL);
30: PetscOptionsGetInt(NULL,"-stencil_width",&stencil_width,NULL);
31: PetscOptionsGetInt(NULL,"-periodic",&pt,NULL);
32: if (pt == 1) bx = DM_BOUNDARY_PERIODIC;
33: if (pt == 2) by = DM_BOUNDARY_PERIODIC;
34: if (pt == 3) {bx = DM_BOUNDARY_PERIODIC; by = DM_BOUNDARY_PERIODIC;}
35: if (pt == 4) bz = DM_BOUNDARY_PERIODIC;
37: PetscOptionsGetInt(NULL,"-stencil_type",&st,NULL);
38: stencil_type = (DMDAStencilType) st;
40: PetscOptionsHasName(NULL,"-one",&flg2);
41: PetscOptionsHasName(NULL,"-two",&flg2);
42: PetscOptionsHasName(NULL,"-three",&flg3);
43: if (flg2) {
44: DMDACreate2d(PETSC_COMM_WORLD,bx,by,stencil_type,M,N,m,n,dof,stencil_width,0,0,&da);
45: } else if (flg3) {
46: DMDACreate3d(PETSC_COMM_WORLD,bx,by,bz,stencil_type,M,N,P,m,n,p,dof,stencil_width,0,0,0,&da);
47: } else {
48: DMDACreate1d(PETSC_COMM_WORLD,bx,M,dof,stencil_width,NULL,&da);
49: }
51: DMCreateGlobalVector(da,&global1);
52: PetscRandomCreate(PETSC_COMM_WORLD,&rdm);
53: PetscRandomSetFromOptions(rdm);
54: DMCreateGlobalVector(da,&global2);
55: DMCreateGlobalVector(da,&global3);
56: DMCreateGlobalVector(da,&global4);
58: PetscViewerBinaryOpen(PETSC_COMM_WORLD,"temp",FILE_MODE_WRITE,&viewer);
59: VecSetRandom(global1,rdm);
60: VecView(global1,viewer);
61: VecSetRandom(global3,rdm);
62: VecView(global3,viewer);
63: PetscViewerDestroy(&viewer);
65: PetscViewerBinaryOpen(PETSC_COMM_WORLD,"temp",FILE_MODE_READ,&viewer);
66: VecLoad(global2,viewer);
67: VecLoad(global4,viewer);
68: PetscViewerDestroy(&viewer);
70: VecAXPY(global2,mone,global1);
71: VecNorm(global2,NORM_MAX,&norm);
72: if (norm != 0.0) {
73: MPI_Comm_size(PETSC_COMM_WORLD,&size);
74: PetscPrintf(PETSC_COMM_WORLD,"ex23: Norm of difference %g should be zero\n",(double)norm);
75: PetscPrintf(PETSC_COMM_WORLD," Number of processors %d\n",size);
76: PetscPrintf(PETSC_COMM_WORLD," M,N,P,dof %D %D %D %D\n",M,N,P,dof);
77: PetscPrintf(PETSC_COMM_WORLD," stencil_width %D stencil_type %d periodic %d\n",stencil_width,(int)stencil_type,(int)bx);
78: PetscPrintf(PETSC_COMM_WORLD," dimension %d\n",1 + (int) flg2 + (int) flg3);
79: }
80: VecAXPY(global4,mone,global3);
81: VecNorm(global4,NORM_MAX,&norm);
82: if (norm != 0.0) {
83: MPI_Comm_size(PETSC_COMM_WORLD,&size);
84: PetscPrintf(PETSC_COMM_WORLD,"ex23: Norm of difference %g should be zero\n",(double)norm);
85: PetscPrintf(PETSC_COMM_WORLD," Number of processors %d\n",size);
86: PetscPrintf(PETSC_COMM_WORLD," M,N,P,dof %D %D %D %D\n",M,N,P,dof);
87: PetscPrintf(PETSC_COMM_WORLD," stencil_width %D stencil_type %d periodic %d\n",stencil_width,(int)stencil_type,(int)bx);
88: PetscPrintf(PETSC_COMM_WORLD," dimension %d\n",1 + (int) flg2 + (int) flg3);
89: }
92: PetscRandomDestroy(&rdm);
93: DMDestroy(&da);
94: VecDestroy(&global1);
95: VecDestroy(&global2);
96: VecDestroy(&global3);
97: VecDestroy(&global4);
98: PetscFinalize();
99: return 0;
100: }