On 09/15/2012 11:45 PM, usrp n210 wrote: > Is there any advantage to use TUN/TAP interface ?
Tun/tap is a convenient way to get access to the network stack from userspace. Unfortunately the benchmark* apps abuse tun/tap as a mac layer, which is precisely the wrong thing to do. For example: https://en.wikipedia.org/wiki/Transmission_Control_Protocol#TCP_over_wireless_networks (if you wait a few days, there will be some sweet work released with MAC layer + message passing in GRC. Stay tuned...) -josh > As 802.11bbn also uses TUN/TAP interface. > But I think in the tun/tap performance degrades as we send the packet back > to user process? > Therefore I compare results with benchmark_xx.py in /ofdm with tunnel.py > in /ofdm. > In results benchmark_xx.py do not give consistent throughput (i.e. it > varies on channel) but tunnel.py gives 100% throughput irrespective of > channel > Will there be any valid reason for this ? > If I want to implement 2-way communication in USRP should I use TUN/TAP > interface? > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
