[B.A.T.M.A.N.] Multiple radios to improve throughput

[Shane Chao <schao@changind.com>]

Elektra,

Thank you for pointing out in May 08 that most embedded boards do not 
have enough CPU power to saturate the capacity of single radio link.  I 
was experimenting Batman in a straight line, three node configuration 
with the middle node having two radios so it doesn't have to switch 
between node 1 and node 3.  My configuration is as follows:

node 1          node 2          node 3
------          ------          ------
  ath0 <--ch 1--> ath0
                  ath1 <--ch 11-> ath0

When I ran iperf between node 1 and 3, I did not see any throughput 
improvements with either one or two radios in node 2. I even stopped 
Batman and manually setup the routes and the performance remains the 
same.  However, when I upgrade node 2 from a 200MHz CPU board to a 
500MHz CPU board, the bandwidth went up 50%.  So thanks again for 
pointing out my bottleneck:)

Lastly, can someone suggest some embedded boards fast enough to push 
wifi radios to its limits?

Thanks,
Shane