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

--- 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();