irtt 专门测长期延迟稳定性和抖动，按固定间隔发包（如每 10ms 一个），统计 RTT、单向延迟、IPDV（抖动）和丢包。它比 ping 精确得多，很适合跑几小时甚至几天的稳定性测试。

相比于传统的 ICMP (Ping) 测试，IRTT 采用 UDP 能够更真实地模拟 VoIP、在线游戏等实时业务的流量，并能同时测量出双向丢包、单向延迟 (OWD) 以及抖动 (IPDV) 等深度指标。

irtt server
irtt client -i 10ms -d 1h -l 64 
<server_ip> -o result.json

在 alpine 下安装：

echo "@edgecommunity http://mirrors.ustc.edu.cn/alpine/edge/community" >> /etc/apk/repositories
apk update
apk add irtt@edgecommunity

其他系统按需安装。

也可以这样纯静态交叉编译后放到目标机器中使用：

$ git clone https://github.com/heistp/irtt.git
$ cd irtt
$ CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -ldflags="-s -w -extldflags '-static'" -o irtt_linux_arm64 ./cmd/irtt

效果：

seq=1213 rtt=270µs rd=1.9s sd=-1.9s ipdv=71.5µs
seq=1214 rtt=254µs rd=1.9s sd=-1.9s ipdv=15.3µs
seq=1215 rtt=283µs rd=1.9s sd=-1.9s ipdv=28.3µs
interrupt
                        Min    Mean  Median     Max  Stddev
                        ---    ----  ------     ---  ------
                RTT   171µs   280µs   273µs  3.74ms   111µs
         send delay   -1.9s   -1.9s   -1.9s   -1.9s   105µs
      receive delay    1.9s    1.9s    1.9s    1.9s  18.9µs

      IPDV (jitter)   180ns  49.2µs    33µs  3.52ms   147µs
          send IPDV    63ns  41.1µs  26.4µs  3.45ms   143µs
       receive IPDV    30ns  18.2µs  13.8µs   158µs  17.7µs

     send call time  10.5µs  20.5µs           127µs  9.05µs
        timer error    76ns   258µs           925µs   159µs
  server proc. time  2.95µs  6.57µs          53.8µs  2.55µs

                duration: 12.2s (wait 0s)
   packets sent/received: 1217/1216 (0.08% loss)
 server packets received: 1216/1217 (0.08%/0.00% loss up/down)
     bytes sent/received: 77888/77824
       send/receive rate: 51.2 Kbps / 51.2 Kbps
             timer stats: 2/1219 (0.16%) missed, 2.58% error