Iperf3：爲什麼是在服務器站點中沒有發件人交通

Question

我試圖把我的兩臺機器和輸出之間的測試如下：

Server listening on 5201 
----------------------------------------------------------- 
Accepted connection from 192.168.100.113, port 41749 
[ 5] local 192.168.100.114 port 5201 connected to 192.168.100.113 port 41750 
[ ID] Interval   Transfer  Bandwidth 
[ 5] 0.00-1.00 sec 479 MBytes 4.02 Gbits/sec     
[ 5] 1.00-2.00 sec 611 MBytes 5.13 Gbits/sec     
[ 5] 2.00-3.00 sec 615 MBytes 5.16 Gbits/sec     
[ 5] 3.00-4.00 sec 614 MBytes 5.15 Gbits/sec     
[ 5] 4.00-5.00 sec 616 MBytes 5.17 Gbits/sec     
[ 5] 5.00-6.00 sec 597 MBytes 5.01 Gbits/sec     
[ 5] 6.00-7.00 sec 519 MBytes 4.35 Gbits/sec     
[ 5] 7.00-8.00 sec 561 MBytes 4.70 Gbits/sec     
[ 5] 8.00-9.00 sec 590 MBytes 4.95 Gbits/sec     
[ 5] 9.00-10.00 sec 600 MBytes 5.03 Gbits/sec     
[ 5] 10.00-10.05 sec 27.5 MBytes 4.47 Gbits/sec     
- - - - - - - - - - - - - - - - - - - - - - - - - 
[ ID] Interval   Transfer  Bandwidth 
[ 5] 0.00-10.05 sec 0.00 Bytes 0.00 bits/sec     sender 
[ 5] 0.00-10.05 sec 5.69 GBytes 4.87 Gbits/sec     receiver 

$ iperf3 -c 192.168.100.114 -w 300k 
Connecting to host 192.168.100.114, port 5201 
[ 4] local 192.168.100.113 port 41750 connected to 192.168.100.114 port 5201 
[ ID] Interval   Transfer  Bandwidth  Retr Cwnd 
[ 4] 0.00-1.00 sec 506 MBytes 4.24 Gbits/sec 0 216 KBytes  
[ 4] 1.00-2.00 sec 613 MBytes 5.14 Gbits/sec 0 216 KBytes  
[ 4] 2.00-3.00 sec 613 MBytes 5.14 Gbits/sec 0 216 KBytes  
[ 4] 3.00-4.00 sec 615 MBytes 5.16 Gbits/sec 0 216 KBytes  
[ 4] 4.00-5.00 sec 617 MBytes 5.18 Gbits/sec 0 216 KBytes  
[ 4] 5.00-6.00 sec 595 MBytes 4.99 Gbits/sec 0 216 KBytes  
[ 4] 6.00-7.00 sec 515 MBytes 4.32 Gbits/sec 0 216 KBytes  
[ 4] 7.00-8.00 sec 565 MBytes 4.74 Gbits/sec 0 216 KBytes  
[ 4] 8.00-9.00 sec 590 MBytes 4.95 Gbits/sec 0 216 KBytes  
[ 4] 9.00-10.00 sec 601 MBytes 5.05 Gbits/sec 0 216 KBytes  
- - - - - - - - - - - - - - - - - - - - - - - - - 
[ ID] Interval   Transfer  Bandwidth  Retr 
[ 4] 0.00-10.00 sec 5.69 GBytes 4.89 Gbits/sec 0    sender 
[ 4] 0.00-10.00 sec 5.69 GBytes 4.89 Gbits/sec     receiver 

從客戶端站點的輸出，我們可以看到有發送者和接收者的流量記錄，但是從服務器站點來看，只有接收者流量。

比我運行在反向模式下，服務器站點沒有接收器通信。

Server listening on 5201 
----------------------------------------------------------- 
Accepted connection from 192.168.100.113, port 41755 
[ 5] local 192.168.100.114 port 5201 connected to 192.168.100.113 port 41756 
[ ID] Interval   Transfer  Bandwidth  Retr Cwnd 
[ 5] 0.00-1.00 sec 611 MBytes 5.13 Gbits/sec 0 212 KBytes  
[ 5] 1.00-2.00 sec 629 MBytes 5.28 Gbits/sec 0 212 KBytes  
[ 5] 2.00-3.00 sec 637 MBytes 5.35 Gbits/sec 0 212 KBytes  
[ 5] 3.00-4.00 sec 642 MBytes 5.39 Gbits/sec 0 212 KBytes  
[ 5] 4.00-5.00 sec 641 MBytes 5.38 Gbits/sec 0 212 KBytes  
[ 5] 5.00-6.00 sec 643 MBytes 5.39 Gbits/sec 0 212 KBytes  
[ 5] 6.00-7.00 sec 638 MBytes 5.35 Gbits/sec 0 212 KBytes  
[ 5] 7.00-8.00 sec 641 MBytes 5.38 Gbits/sec 0 212 KBytes  
[ 5] 8.00-9.00 sec 630 MBytes 5.29 Gbits/sec 0 212 KBytes  
[ 5] 9.00-10.00 sec 637 MBytes 5.35 Gbits/sec 0 212 KBytes  
[ 5] 10.00-10.04 sec 19.9 MBytes 4.15 Gbits/sec 0 212 KBytes  
- - - - - - - - - - - - - - - - - - - - - - - - - 
[ ID] Interval   Transfer  Bandwidth  Retr 
[ 5] 0.00-10.04 sec 6.22 GBytes 5.32 Gbits/sec 0    sender 
[ 5] 0.00-10.04 sec 0.00 Bytes 0.00 bits/sec     receiver 

$ iperf3 -c 192.168.100.114 -w 300k -R 
Connecting to host 192.168.100.114, port 5201 
Reverse mode, remote host 192.168.100.114 is sending 
[ 4] local 192.168.100.113 port 41756 connected to 192.168.100.114 port 5201 
[ ID] Interval   Transfer  Bandwidth 
[ 4] 0.00-1.00 sec 631 MBytes 5.29 Gbits/sec     
[ 4] 1.00-2.00 sec 630 MBytes 5.29 Gbits/sec     
[ 4] 2.00-3.00 sec 638 MBytes 5.35 Gbits/sec     
[ 4] 3.00-4.00 sec 641 MBytes 5.38 Gbits/sec     
[ 4] 4.00-5.00 sec 640 MBytes 5.37 Gbits/sec     
[ 4] 5.00-6.00 sec 643 MBytes 5.39 Gbits/sec     
[ 4] 6.00-7.00 sec 641 MBytes 5.38 Gbits/sec     
[ 4] 7.00-8.00 sec 639 MBytes 5.36 Gbits/sec     
[ 4] 8.00-9.00 sec 631 MBytes 5.29 Gbits/sec     
[ 4] 9.00-10.00 sec 636 MBytes 5.34 Gbits/sec     
- - - - - - - - - - - - - - - - - - - - - - - - - 
[ ID] Interval   Transfer  Bandwidth  Retr 
[ 4] 0.00-10.00 sec 6.22 GBytes 5.34 Gbits/sec 0    sender 
[ 4] 0.00-10.00 sec 6.22 GBytes 5.34 Gbits/sec     receiver 

有人可以幫助解釋爲什麼嗎？非常感謝。

Answer 1

由於與iperf3的控制通道上的消息排序有關的各種原因，服務器無法從客戶端打印彙總統計信息。這是一個已知的問題（圍繞此問題的iperf3問題跟蹤器中存在各種問題，如＃560和＃314）。修復這個問題並不是特別容易，因爲解決這個問題會涉及到改變iperf3控制消息的順序或語義，但不幸的是，這些消息沒有特別好記錄。我們（ESnet）很樂意接受可能的修復。