Actual source code: ex9.c
1:
2: static char help[] = "Tests DMGetColoring() in 3d.\n\n";
4: #include <petscmat.h>
5: #include <petscdmda.h>
9: int main(int argc,char **argv)
10: {
11: PetscInt i,M = 3,N = 5,P=3,s=1,w=2,m = PETSC_DECIDE,n = PETSC_DECIDE,p = PETSC_DECIDE;
13: PetscInt *lx = PETSC_NULL,*ly = PETSC_NULL,*lz = PETSC_NULL;
14: DM da;
15: PetscBool flg = PETSC_FALSE,test_order = PETSC_FALSE;
16: ISColoring coloring;
17: Mat mat;
18: DMDAStencilType stencil_type = DMDA_STENCIL_BOX;
19: Vec lvec,dvec;
20: MatFDColoring fdcoloring;
22: PetscInitialize(&argc,&argv,(char*)0,help);
24: /* Read options */
25: PetscOptionsGetInt(PETSC_NULL,"-M",&M,PETSC_NULL);
26: PetscOptionsGetInt(PETSC_NULL,"-N",&N,PETSC_NULL);
27: PetscOptionsGetInt(PETSC_NULL,"-P",&P,PETSC_NULL);
28: PetscOptionsGetInt(PETSC_NULL,"-m",&m,PETSC_NULL);
29: PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);
30: PetscOptionsGetInt(PETSC_NULL,"-p",&p,PETSC_NULL);
31: PetscOptionsGetInt(PETSC_NULL,"-s",&s,PETSC_NULL);
32: PetscOptionsGetInt(PETSC_NULL,"-w",&w,PETSC_NULL);
33: PetscOptionsGetBool(PETSC_NULL,"-star",&flg,PETSC_NULL);
34: if (flg) stencil_type = DMDA_STENCIL_STAR;
35: PetscOptionsGetBool(PETSC_NULL,"-test_order",&test_order,PETSC_NULL);
36: flg = PETSC_FALSE;
37: PetscOptionsGetBool(PETSC_NULL,"-distribute",&flg,PETSC_NULL);
38: if (flg) {
39: if (m == PETSC_DECIDE) SETERRQ(PETSC_COMM_WORLD,1,"Must set -m option with -distribute option");
40: PetscMalloc(m*sizeof(PetscInt),&lx);
41: for (i=0; i<m-1; i++) { lx[i] = 4;}
42: lx[m-1] = M - 4*(m-1);
43: if (n == PETSC_DECIDE) SETERRQ(PETSC_COMM_WORLD,1,"Must set -n option with -distribute option");
44: PetscMalloc(n*sizeof(PetscInt),&ly);
45: for (i=0; i<n-1; i++) { ly[i] = 2;}
46: ly[n-1] = N - 2*(n-1);
47: if (p == PETSC_DECIDE) SETERRQ(PETSC_COMM_WORLD,1,"Must set -p option with -distribute option");
48: PetscMalloc(p*sizeof(PetscInt),&lz);
49: for (i=0; i<p-1; i++) { lz[i] = 2;}
50: lz[p-1] = P - 2*(p-1);
51: }
53: /* Create distributed array and get vectors */
54: DMDACreate3d(PETSC_COMM_WORLD,DMDA_BOUNDARY_NONE,DMDA_BOUNDARY_NONE,DMDA_BOUNDARY_NONE,stencil_type,M,N,P,m,n,p,w,s,lx,ly,lz,&da);
55: PetscFree(lx);
56: PetscFree(ly);
57: PetscFree(lz);
59: DMGetColoring(da,IS_COLORING_GLOBAL,MATMPIAIJ,&coloring);
60: DMGetMatrix(da,MATMPIAIJ,&mat);
61: MatFDColoringCreate(mat,coloring,&fdcoloring);
63: DMCreateGlobalVector(da,&dvec);
64: DMCreateLocalVector(da,&lvec);
66: /* Free memory */
67: MatFDColoringDestroy(&fdcoloring);
68: VecDestroy(&dvec);
69: VecDestroy(&lvec);
70: MatDestroy(&mat);
71: ISColoringDestroy(&coloring);
72: DMDestroy(&da);
73: PetscFinalize();
74: return 0;
75: }
76: