iperfを使ってPC間の通信速度を確認する

iperfを使ってPC間の通信速度を確認した際のメモです

環境

今回は以下を使用
Ubuntu18.04
Jetson Nano

iperfとは

ネットワークの帯域幅を測定するツール

https://github.com/esnet/iperf
iperf is a tool for active measurements of the maximum achievable bandwidth on IP networks.

install

sudo apt install iperf -y

測定

Ubuntu18.04側で以下を実行する

$ iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
------------------------------------------------------------
[  4] local 192.168.179.6 port 5001 connected with 192.168.179.8 port 47160
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0- 8.2 sec   768 KBytes   763 Kbits/sec

Jetson Nano側で以下を実行すると測定できる（例：IPアドレスが192.168.179.6の場合）

$ iperf -c 192.168.179.6
------------------------------------------------------------
Client connecting to 192.168.179.6, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.179.8 port 47160 connected with 192.168.179.6 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 7.7 sec   768 KBytes   819 Kbits/sec

無線だとBandWidthがやっぱり低い

$ iperf -c 192.168.179.6
------------------------------------------------------------
Client connecting to 192.168.179.6, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.179.8 port 47872 connected with 192.168.179.6 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  12.4 MBytes  10.4 Mbits/sec

クロスケーブルで繋ぐとこれくらいのBandWidth
以下の設定をした場合の例
PC側:sudo ifconfig eth 192.168.1.1 up
JetsonNano側: sudo ifconfig eth0 192.168.1.2 up

jetson@jetson-desktop:~/catkin_ws/src/ai_race/ai_race/learning/scripts$ iperf -c 192.168.1.1
------------------------------------------------------------
Client connecting to 192.168.1.1, TCP port 5001
TCP window size:  926 KByte (default)
------------------------------------------------------------
[  3] local 192.168.1.2 port 60778 connected with 192.168.1.1 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.09 GBytes   939 Mbits/sec

参考

[Network]iperfでLAN内のパソコン間のネットワーク速度を測定する
ネットワーク測定ツールiperfの使い方
https://github.com/esnet/iperf