www.pudn.com > some-ns2-trace-awk.rar > measure-delay.awk, change:2007-09-11,size:1130b

 
#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); 
   } 
}