Actual source code: ex9.c

  1: /*$Id: ex9.c,v 1.21 2001/06/21 21:19:28 bsmith Exp $*/
  2: 
  3: static char help[] = "Tests DAGetColoring() in 3d.nn";

 5:  #include petscmat.h
 6:  #include petscda.h

  8: int main(int argc,char **argv)
  9: {
 10:   int            i,M = 3,N = 5,P=3,s=1,w=2;
 11:   int            m = PETSC_DECIDE,n = PETSC_DECIDE,p = PETSC_DECIDE,ierr;
 12:   int            *lx = PETSC_NULL,*ly = PETSC_NULL,*lz = PETSC_NULL;
 13:   DA             da;
 14:   PetscTruth     flg,test_order;
 15:   ISColoring     coloring;
 16:   Mat            mat;
 17:   DAStencilType  stencil_type = DA_STENCIL_BOX;
 18:   Vec            lvec,dvec;
 19:   MatFDColoring  fdcoloring;

 21:   PetscInitialize(&argc,&argv,(char*)0,help);

 23:   /* Read options */
 24:   PetscOptionsGetInt(PETSC_NULL,"-M",&M,PETSC_NULL);
 25:   PetscOptionsGetInt(PETSC_NULL,"-N",&N,PETSC_NULL);
 26:   PetscOptionsGetInt(PETSC_NULL,"-P",&P,PETSC_NULL);
 27:   PetscOptionsGetInt(PETSC_NULL,"-m",&m,PETSC_NULL);
 28:   PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);
 29:   PetscOptionsGetInt(PETSC_NULL,"-p",&p,PETSC_NULL);
 30:   PetscOptionsGetInt(PETSC_NULL,"-s",&s,PETSC_NULL);
 31:   PetscOptionsGetInt(PETSC_NULL,"-w",&w,PETSC_NULL);
 32:   PetscOptionsHasName(PETSC_NULL,"-star",&flg);
 33:   if (flg) stencil_type =  DA_STENCIL_STAR;
 34:   PetscOptionsHasName(PETSC_NULL,"-test_order",&test_order);
 35:   PetscOptionsHasName(PETSC_NULL,"-distribute",&flg);
 36:   if (flg) {
 37:     if (m == PETSC_DECIDE) SETERRQ(1,"Must set -m option with -distribute option");
 38:     PetscMalloc(m*sizeof(int),&lx);
 39:     for (i=0; i<m-1; i++) { lx[i] = 4;}
 40:     lx[m-1] = M - 4*(m-1);
 41:     if (n == PETSC_DECIDE) SETERRQ(1,"Must set -n option with -distribute option");
 42:     PetscMalloc(n*sizeof(int),&ly);
 43:     for (i=0; i<n-1; i++) { ly[i] = 2;}
 44:     ly[n-1] = N - 2*(n-1);
 45:     if (p == PETSC_DECIDE) SETERRQ(1,"Must set -p option with -distribute option");
 46:     PetscMalloc(p*sizeof(int),&lz);
 47:     for (i=0; i<p-1; i++) { lz[i] = 2;}
 48:     lz[p-1] = P - 2*(p-1);
 49:   }

 51:   /* Create distributed array and get vectors */
 52:   DACreate3d(PETSC_COMM_WORLD,DA_NONPERIODIC,stencil_type,M,N,P,m,n,p,w,s,
 53:                     lx,ly,lz,&da);
 54:   if (lx) {
 55:     PetscFree(lx);
 56:     PetscFree(ly);
 57:     PetscFree(lz);
 58:   }

 60:   DAGetColoring(da,IS_COLORING_LOCAL,&coloring);
 61:   DAGetMatrix(da,MATMPIAIJ,&mat);
 62:   MatFDColoringCreate(mat,coloring,&fdcoloring);

 64:   DACreateGlobalVector(da,&dvec);
 65:   DACreateLocalVector(da,&lvec);

 67:   /* Free memory */
 68:   MatFDColoringDestroy(fdcoloring);
 69:   VecDestroy(dvec);
 70:   VecDestroy(lvec);
 71:   MatDestroy(mat);
 72:   ISColoringDestroy(coloring);
 73:   DADestroy(da);
 74:   PetscFinalize();
 75:   return 0;
 76: }
 77: