iperf
TCP测试更适合评估网络的可靠性和吞吐量，而UDP测试则可以更全面地评估网络的性能，包括带宽、延迟和丢包情况。
参数
| 参数 | 描述 | 示例 |
|---|---|---|
| -s | 服务器模式 | iperf3 -s |
| -c | 客户端模式，并指定目标ip | iperf3 -c 127.0.0.1 |
| -u | 指定udp模式（默认是tcp模式） | iperf3 -u -c 127.0.0.1 |
| -b | 指定目标带宽，单位Mbps | iperf3 -c 127.0.0.1 -b 28M |
| -t | 持续时间，单位秒 | iperf3 -c 127.0.0.1 -t 5 |
| -i | 间隔时间，单位秒 | iperf3 -c 127.0.0.1 -t 5 -i 1 |
| -p | 端口号，默认5201 | iperf3 -c 127.0.0.1 -p 8080 |
| -l | 指定缓冲区大小，单位字节 | iperf3 -c 127.0.0.1 -l 8 |
日志分析
udp未丢包
# ------------------------------
# client cmd
iperf3 -c 47.92.100.29 -u -b 28M
# client
[ ID] Interval Transfer Bitrate Total Datagrams
[ 5] 0.00-1.00 sec 3.34 MBytes 28.0 Mbits/sec 2397
...
[ 5] 9.00-10.00 sec 3.34 MBytes 28.0 Mbits/sec 2398
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-10.00 sec 33.4 MBytes 28.0 Mbits/sec 0.000 ms 0/23972 (0%) sender
[ 5] 0.00-10.05 sec 33.4 MBytes 27.8 Mbits/sec 0.453 ms 0/23972 (0%) receiver
# ------------------------------
# server
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-1.00 sec 3.16 MBytes 26.5 Mbits/sec 0.199 ms 0/2271 (0%)
...
[ 5] 9.00-10.00 sec 3.33 MBytes 28.0 Mbits/sec 0.459 ms 0/2395 (0%)
[ 5] 10.00-10.05 sec 181 KBytes 27.7 Mbits/sec 0.453 ms 0/127 (0%)
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-10.05 sec 33.4 MBytes 27.8 Mbits/sec 0.453 ms 0/23972 (0%) receiver
udp丢包
# ------------------------------
# client cmd
iperf3 -c 47.92.100.29 -u -b 30M
# client
[ ID] Interval Transfer Bitrate Total Datagrams
[ 5] 0.00-1.00 sec 3.58 MBytes 30.0 Mbits/sec 2568
...
[ 5] 9.00-10.00 sec 3.58 MBytes 30.0 Mbits/sec 2570
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-10.00 sec 35.8 MBytes 30.0 Mbits/sec 0.000 ms 0/25685 (0%) sender
[ 5] 0.00-10.09 sec 35.4 MBytes 29.4 Mbits/sec 0.398 ms 0/25679 (0%) receiver
# ------------------------------
# server
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-1.00 sec 3.25 MBytes 27.3 Mbits/sec 0.442 ms 0/2337 (0%)
[ 5] 1.00-2.00 sec 3.58 MBytes 30.1 Mbits/sec 0.353 ms 0/2573 (0%)
[ 5] 2.00-3.00 sec 3.57 MBytes 30.0 Mbits/sec 0.324 ms 0/2566 (0%)
[ 5] 3.00-4.00 sec 3.58 MBytes 30.0 Mbits/sec 0.311 ms 0/2570 (0%)
[ 5] 4.00-5.00 sec 3.58 MBytes 30.0 Mbits/sec 0.379 ms 0/2569 (0%)
[ 5] 5.00-6.00 sec 3.58 MBytes 30.0 Mbits/sec 0.385 ms 0/2571 (0%)
[ 5] 6.00-7.00 sec 3.57 MBytes 30.0 Mbits/sec 0.425 ms 0/2567 (0%)
[ 5] 7.00-8.00 sec 3.57 MBytes 30.0 Mbits/sec 0.351 ms 0/2565 (0%)
[ 5] 8.00-9.00 sec 3.46 MBytes 29.0 Mbits/sec 0.431 ms 87/2571 (3.4%)
[ 5] 9.00-10.00 sec 3.33 MBytes 27.9 Mbits/sec 0.409 ms 177/2569 (6.9%)
[ 5] 10.00-10.09 sec 295 KBytes 27.5 Mbits/sec 0.398 ms 14/221 (6.3%)
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[SUM] 0.0-10.1 sec 23 datagrams received out-of-order
[ 5] 0.00-10.09 sec 35.4 MBytes 29.4 Mbits/sec 0.398 ms 278/25679 (1.1%) receiver
tcp
# ------------------------------
# client cmd
iperf3 -c 47.92.100.29
# client
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.00 sec 35.4 MBytes 29.7 Mbits/sec sender
[ 5] 0.00-10.04 sec 35.2 MBytes 29.4 Mbits/sec receiver
# ------------------------------
# server
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.04 sec 35.2 MBytes 29.4 Mbits/sec receiver
指定客户端尝试以100Mbps的速度发送数据，但实际能达到的带宽还取决于网络条件和服务器的性能。
# ------------------------------
# client cmd
iperf3 -c 47.92.100.29 -b 100M
# client
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.00 sec 36.0 MBytes 30.2 Mbits/sec sender
[ 5] 0.00-10.04 sec 35.1 MBytes 29.3 Mbits/sec receiver
# ------------------------------
# server
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.04 sec 35.1 MBytes 29.3 Mbits/sec receiver
指定1M带宽测试
iperf3 -c 47.92.100.29 -b 1M
# client
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 128 KBytes 1.05 Mbits/sec
...
[ 5] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.00 sec 1.25 MBytes 1.05 Mbits/sec sender
[ 5] 0.00-10.04 sec 1.25 MBytes 1.04 Mbits/sec receiver
# server
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 128 KBytes 1.05 Mbits/sec
...
[ 5] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.04 sec 1.25 MBytes 1.04 Mbits/sec receiver