ICPSEP Content

63 定义一个笛卡尔拓扑

MPI_Cart_create例程产生一个进程的笛卡尔分解，通过ndim参数给出维数。

   dims(1)    = 4 
   dims(2)    = 3 
   periods(1) = .false. 
   periods(2) = .false. 
   reorder    = .true. 
   ndim       = 2 
   call MPI_CART_CREATE( MPI_COMM_WORLD, ndim, dims,  
  $                      periods, reorder, comm2d, ierr )