Question

我正在尝试编写awk脚本来处理有线网络传输。到目前为止，我已经经历了很多awk脚本，但是它们都是针对无线技术编写的，因此，我发现自己可以编写自己的awk脚本来处理跟踪文件。我对指标计算有些困惑。

我尝试编写下面提供的awk脚本，但偶然发现了几个问题。他们是：

如果我们将tcp数据包从节点0发送到节点1，并且假设该数据包成功到达节点1，但在回程的过程中，作为确认数据包的“ ack”数据包被丢弃。我们会认为封包传送率为50％还是0？
在确定平均延迟时，我们将仅考虑源中间路径还是整个源目标路径？

在确定是否已成功接收到数据包时，我们是否应将源已接收的最终“ ack”数据包视为已接收？还是仅接收包的目的地被接收？

{
  strEvent = $1;  rTime = $2;   from_node = $3; to_node = $4;
  pkt_type = $5;    pkt_size = $6;  flgStr = $7;    flow_id = $8;
  src_addr = $9;    dest_addr = $10;    seq_no = $11;   pkt_id = $12;

 if(pkt_type == "tcp"){

  if (pkt_id > idHighestPacket) idHighestPacket = pkt_id;
  if (pkt_id < idLowestPacket) idLowestPacket = pkt_id; 

  if(rTime>rEndTime) rEndTime=rTime;
  if(rTime<rStartTime) rStartTime=rTime;

  if ( strEvent == "+" && send_flag[pkt_id] == 0 ) {

    nSentPackets += 1 ; rSentTime[ pkt_id ] = rTime ;
    send_flag[pkt_id] = 1;
  }

  if ( strEvent == "r" && pkt_id >= idLowestPacket) {
     nReceivedPackets += 1 ;        nReceivedBytes += pkt_size;

     rReceivedTime[ pkt_id ] = rTime ;
     rDelay[pkt_id] = rReceivedTime[ pkt_id] - rSentTime[ pkt_id ];
     rTotalDelay += rDelay[pkt_id]; 
  }
  if(strEvent == "d"){
    if(rTime>rEndTime) rEndTime=rTime;
    if(rTime<rStartTime) rStartTime=rTime;
    nDropPackets += 1;
  }
 }  
}

END {
 rTime = rEndTime - rStartTime ;
 rThroughput = nReceivedBytes*8 / rTime;
 rPacketDeliveryRatio = nReceivedPackets / nSentPackets * 100 ;
 rPacketDropRatio = nDropPackets / nSentPackets * 100;

 if ( nReceivedPackets != 0 ) {
    rAverageDelay = rTotalDelay / nReceivedPackets ;
 }
 printf( "%15.2f\n%15.5f\n%15.2f\n%15.2f\n", rThroughput,rAverageDelay, nSentPackets, nReceivedPackets);
 printf( "%15.2f\n%10.2f\n%10.2f\n%10.5f\n", nDropPackets, rPacketDeliveryRatio, rPacketDropRatio,rTime);
 printf("Total Delay = %15.5f\n",rTotalDelay);
 printf("Ending Analysis\n");

}

是否有awk脚本用于处理ns2中的有线传输的跟踪文件？

0 个答案: