grid process   2  2
grid size = (  8  6)
process grid size = (  2  2)
 
initial values:
 
      0.00      0.00      0.00      0.00      0.00
      0.00    504.00    505.00    506.00      0.00
      0.00    604.00    605.00    606.00      0.00
      0.00    704.00    705.00    706.00      0.00
      0.00    804.00    805.00    806.00      0.00
      0.00      0.00      0.00      0.00      0.00
 
values after boundary exchange:
 
    403.00    404.00    405.00    406.00      0.00
    503.00    504.00    505.00    506.00      0.00
    603.00    604.00    605.00    606.00      0.00
    703.00    704.00    705.00    706.00      0.00
    803.00    804.00    805.00    806.00      0.00
      0.00      0.00      0.00      0.00      0.00
 
