measure-delay.awk

ns2中的trace分析脚本

#使用的是无线trace的旧格式
BEGIN {
     highest_packet_id = 0;
}
{
   action = $1;
   time = $3;
   #from = $3;
   #to = $4;
   type = $35; #aodv relationships,if 5 no infomation
   pktsize = $37;
   #src = $9;
   #dst = $10;
   #seq_no = $11;
   packet_id = $41;

   #不考虑路由包，可以保证序号为0的cbr被统计到
if ( type != "AODV" ) {

   if ( packet_id > highest_packet_id )
         highest_packet_id = packet_id;
#记录封包的传送时间
if ( start_time[packet_id] == 0 )
        start_time[packet_id] = time;
#记录CBR 的接收时间
 if ( type == "cbr" && action != "d" ) {
      if ( action == "r" ) {
         end_time[packet_id] = time;
      }
   } else {
#把不符合条件的数据包的时间设为-1
end_time[packet_id] = -1;
   }
}
}
END {
#当资料列全部读取完后，开始计算有效封包的端点到端点延迟时间
 for ( packet_id = 0; packet_id <= highest_packet_id; packet_id++ ) {
       start = start_time[packet_id];
       end = end_time[packet_id];
       packet_duration = end - start;
#只把接收时间大于传送时间的记录列出来
 if ( start < end ) printf("%f %f\n", start, packet_duration);
   }
}