Actual source code: ex115.c

  2: static char help[] = "Test memory leak when user switches from one matrix type to another\n\n";

 4:  #include petscmat.h

  8: int main(int argc,char **args)
  9: {
 10:   Mat            C=0;
 11:   PetscScalar    v;
 12:   PetscInt       Ii,J,Istart,Iend;
 14:   PetscInt       i,j,m = 3,n = 2;
 15:   PetscMPIInt    size,rank;
 16:   PetscInt       solve_count;
 17:   const MatType  type;

 19:   PetscInitialize(&argc,&args,(char *)0,help);
 20:   PetscOptionsGetInt(PETSC_NULL,"-m",&m,PETSC_NULL);
 21:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 22:   MPI_Comm_size(PETSC_COMM_WORLD,&size);
 23:   n = 2*size;

 25:   MatCreate(PETSC_COMM_WORLD,&C);
 26:   MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n);
 27:   MatSetFromOptions(C);

 29:   for (solve_count=0; solve_count<3; solve_count++){
 30:     if (solve_count == 1){
 31:       MatSetType(C,MATSBAIJ);
 32:       MatSetOption(C,MAT_IGNORE_LOWER_TRIANGULAR,PETSC_TRUE);
 33:     } else {
 34:       MatSetType(C,MATMPIDENSE);
 35:     }
 36: 
 37:     MatGetOwnershipRange(C,&Istart,&Iend);
 38:     for (Ii=Istart; Ii<Iend; Ii++) {
 39:       v = -1.0; i = Ii/n; j = Ii - i*n;
 40:       if (i>0)   {J = Ii - n; MatSetValues(C,1,&Ii,1,&J,&v,ADD_VALUES);}
 41:       if (i<m-1) {J = Ii + n; MatSetValues(C,1,&Ii,1,&J,&v,ADD_VALUES);}
 42:       if (j>0)   {J = Ii - 1; MatSetValues(C,1,&Ii,1,&J,&v,ADD_VALUES);}
 43:       if (j<n-1) {J = Ii + 1; MatSetValues(C,1,&Ii,1,&J,&v,ADD_VALUES);}
 44:       v = 4.0; MatSetValues(C,1,&Ii,1,&Ii,&v,ADD_VALUES);
 45:     }
 46:     MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);
 47:     MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);
 48:     MatGetType(C,&type);
 49:     PetscPrintf(PETSC_COMM_WORLD," case %D, matrix type: %s\n",solve_count,type);
 50:   }

 52:   /* Free work space. */
 53:   MatDestroy(C);
 54:   PetscFinalize();
 55:   return 0;
 56: }