[Discuss-gnuradio] # of UDP packet

[SangHyuk Kim]

Hi all,

I'm observing packet moving using wireshark.

I used benchmark_rate --rx-rate 25000000 (10 seconds) and result like below:

Using Device: Single USRP:
  Device: USRP2 / N-Series Device
  Mboard 0: N210r4
  RX Channel: 0
    RX DSP: 0
    RX Dboard: A
    RX Subdev: CBX RX
  TX Channel: 0
    TX DSP: 0
    TX Dboard: A
    TX Subdev: CBX TX

Testing receive rate 25.000000 Msps on 1 channels
DD
Benchmark rate summary:
  Num received samples:    249942924
  Num dropped samples:     18513
  Num overflows detected:  0
  Num transmitted samples: 0
  Num sequence errors:     0
  Num underflows detected: 0

And result of wireshark tool described:

# of total packets = 463,471

(1599 packets are setting packet, which is 60~78 bytes and the others 1514 bytes packets)

i) How can I calculate # of total packets ? Are there packets made by USRP ?

Also I used benchmark_tx.py -f 1.18G -m qam16 -W 25000000 -M 200000000

I counted # of sending packets and compare it with wireshark.

printed # of packet on terminal = about 80,000 and wireshark = about 400,000

Even I make 400 bytes packet, wireshark captured 1512 bytes outgoing packet.

ii) How packet transport through LAN cable between host PC and USRP?

Thanks.