This project represents a the official UDP Tx speed Benchmark for the PicoTCP library.

The mbed board is sending 5 frames per milisecond (each frame has 1024 bytes of payload) to a linux host(directly connected). Each time we send a packet, a counter is increased and sent to the receiver, so it can measure the number of packets that were lost during transmission.

The result:
20 seconds Tx Statistics
Total bytes received : 102404096
UDP Speed : 39.064 Mbit/s
Packet loss : 0.000000 %

The python script used (which you should rename it to PicoTCP_Official_UDP_Tx_Benchmark.py)

import socket
from struct import unpack
import fcntl, os
import errno
import random, string
from time import time, sleep

ECHO_SERVER_ADDRESS = "192.168.100.12"
NUMBER_OF_SECONDS = 20
LOCAL_SERVER_PORT = 2327
MEGA = 1024*1024.
LEN_PACKET = 1024
data = ''.join('\0' for _ in range(LEN_PACKET))

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM,socket.IPPROTO_UDP)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(('', LOCAL_SERVER_PORT))

print "Started receiving data...."
print "Time : %d " % time()

while True:
	start = time()
	counter = 0
	size = 0
	lost_packets = 0
	index = -1
	
	while start + NUMBER_OF_SECONDS > time():
		data, addr = s.recvfrom(LEN_PACKET)
		counter+=1
		size += len(data)
		_index = unpack("<I",data[:4])
	        if _index[0] > 0 and index > 0:
			lost_packets += _index[0] - index -1
		index = _index[0]
						

	print "20 seconds Tx Statistics"
	print "Total bytes received : %d" % size
	print "UDP Speed : %.3f Mbit/s" % ((size*8.)/(MEGA * NUMBER_OF_SECONDS))
	print "Packet loss : %.6f %%" % (100. * lost_packets/(lost_packets+counter))

This test is based on the following libraries