test/results

   1 send (B/MB)                     receive (B/MB)                  t(s)    2p              3p              6p
   2 -----------------------------------------------------------------------
   3 33554432/32                     8388608/8                               13              29              35              45
   4 67108864/64                     18874368/18                             34              53              67              103
   5 134217728/128           40894464/39                             66              118             142             167
   6 268435456/256           57671680/55                             121             223             277             378