I have x86 Atom architecture and 3 miniPCI atheros. I have 3 links in nstreme for each miniPCI. I put three links in bonding with balance-rr mode.
Bandwidth test UDP: 230 Mbps, CPU=15% 20%
Bandwidth test TCP:90 Mbps, CPU=50%
When I make bonding with two links I have same results in bandwidth test TCP. I don't know for what reason I obtain poor results in TCP with 3 radios in bonding... each radio with 32Mbps. I tested links separated and I obtain for each link in TCP 70 Mbps...