TASS Belgium / Mbed 2 deprecated UDP_Receive_Test

Simple test for PicoTCP's UDP receiver.

Dependencies:   PicoTCP lpc1768-picotcp-eth mbed-rtos mbed

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

The linux host is sending 5 frames per milisecond (each frame has 1024 bytes of payload) to a the mbed board(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 Rx statistics
Total bytes received : 47557632
UDP Speed :18.142 Mbit/s
Loss percentage: 36.65 %

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

import struct
import socket
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))
counter = 0

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 sending data...."
print "Time : %d " % time()

while True:
	start = time()
	cnt = 0
	while cnt < 5:
		
		list_data = list(data)
		list_data[3] = chr(counter>>24 & 0xFF)
		list_data[2] = chr(counter>>16 & 0xFF)
		list_data[1] = chr(counter>>8 & 0xFF)
		list_data[0] = chr(counter & 0xFF)
		data = ''.join(list_data)

		s.sendto(data, (ECHO_SERVER_ADDRESS, LOCAL_SERVER_PORT))
		cnt+=1
		counter+=1

	sleep(0.001)

This test is based on the following libraries

Import librarylpc1768-picotcp-eth

A PicoTCP driver for the lpc1768 mbed board

Last commit 16 Jan 2014 by TASS Belgium

Import libraryPicoTCP

Free (GPLv2) TCP/IP stack developed by TASS Belgium

Last commit 28 Jan 2016 by Daniele Lacamera

Import librarymbed-rtos

Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard.

Last commit 04 Jul 2017 by mbed official

Files at this revision

API Documentation at this revision

Revision 1:81060ee2ac04, committed 2013-10-03

Comitter:
tass
Date:
Thu Oct 03 07:05:52 2013 +0000
Parent:
0:28a7ae57d114
Commit message:
UDP Rx Official Benchmark

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/main.cpp	Fri Jul 26 11:30:50 2013 +0000
+++ b/main.cpp	Thu Oct 03 07:05:52 2013 +0000
@@ -1,6 +1,7 @@
 #include "mbed.h"
 #include "EthernetInterface.h"
 
+#define MEGA               (1024*1024)
 #define BUFFER_SIZE        1024
 #define NUMBER_OF_SECONDS (20*1000u)  // 20 seconds
 
@@ -12,6 +13,7 @@
 {
     int BytesReceived;
     int FramesReceived;
+    int LostPackets;
 };
 
 struct UDPStat UDP_Statistics;
@@ -38,36 +40,34 @@
     while(true)
     {
         unsigned int time = PICO_TIME_MS();
+        int index = -1;
         
         memset(&UDP_Statistics,0x0,sizeof(struct UDPStat));
         while( (time + NUMBER_OF_SECONDS) >= (unsigned int)PICO_TIME_MS())
         {
             int size;
             size = server.receiveFrom(endp,buffer,sizeof(buffer));
-            if(size <= 0)
+            if(size > 0)
             {
-                if(!size)
-                    printf("Receive timeout\n");
-                else
-                    printf("Receive returned error\n");
-            }
-            else
-            {
+                int _index;
                 UDP_Statistics.BytesReceived += size;
                 UDP_Statistics.FramesReceived++;
+                _index = *((int *)buffer);
+                
+                if(index>0)
+                {
+                    UDP_Statistics.LostPackets+= _index-index-1;
+                }
+                index = _index;
             }
         }
         time = PICO_TIME_MS() - time;
         time = time/1000;
         
-        printf("Connection statistics for 20 seconds :\n");
+        printf("20 seconds Rx statistics\n");
         printf("Total bytes received : %d\n",UDP_Statistics.BytesReceived);
-        printf("Average bytes received :%.2f per sec\n",(float)(UDP_Statistics.BytesReceived)/time);
-        
-        printf("Total frames received :%d\n",UDP_Statistics.FramesReceived);
-        printf("Average frames received :%.2f per sec\n",(float)(UDP_Statistics.FramesReceived)/time);
-
-        printf("Loss percentage: %.2f %%\n\n\n",((NUMBER_OF_FRAMES - (float)UDP_Statistics.FramesReceived/time)/NUMBER_OF_FRAMES)*100);
+        printf("UDP Speed :%.3f Mbit/s\n",(UDP_Statistics.BytesReceived *8.0)/(20.0*MEGA));
+        printf("Loss percentage: %.2f %%\n\n\n",(UDP_Statistics.LostPackets*100.0)/(UDP_Statistics.LostPackets+UDP_Statistics.FramesReceived));
     }
     
     server.close();