Linux环境安装iperf3（网络性能测试工具）

[root@localhost ]# yum search iperf
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile

 * base: mirrors.tuna.tsinghua.edu.cn
 * extras: mirrors.huaweicloud.com
 * updates: mirrors.tuna.tsinghua.edu.cn
==================================================================== N/S matched: iperf ====================================================================
iperf3-devel.i686 : Development files for iperf3
iperf3-devel.x86_64 : Development files for iperf3
iperf3.i686 : Measurement tool for TCP/UDP bandwidth performance
iperf3.x86_64 : Measurement tool for TCP/UDP bandwidth performance

  名称和简介匹配 only，使用“search all”试试。
[root@localhost ]#
[root@localhost ]# yum install iperf3
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.tuna.tsinghua.edu.cn
 * extras: mirrors.huaweicloud.com
 * updates: mirrors.tuna.tsinghua.edu.cn
正在解决依赖关系
--> 正在检查事务
---> 软件包 iperf3.x86_64.0.3.1.7-2.el7 将被 安装
--> 解决依赖关系完成

依赖关系解决

============================================================================================================================================================
 Package                             架构                                版本                                       源                                 大小
============================================================================================================================================================
正在安装:
 iperf3                              x86_64                              3.1.7-2.el7                                base                               79 k

事务概要
============================================================================================================================================================
安装  1 软件包

总下载量：79 k
安装大小：197 k
Is this ok [y/d/N]: y
Downloading packages:
iperf3-3.1.7-2.el7.x86_64.rpm                                                                                                        |  79 kB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  正在安装    : iperf3-3.1.7-2.el7.x86_64                                                                                                               1/1
  验证中      : iperf3-3.1.7-2.el7.x86_64                                                                                                               1/1

已安装:
  iperf3.x86_64 0:3.1.7-2.el7

完毕！
[root@localhost ]# iperf3 -v
iperf 3.1.7
Linux localhost 3.10.0-1160.71.1.el7.x86_64 #1 SMP Tue Jun 28 15:37:28 UTC 2022 x86_64
Optional features available: CPU affinity setting, IPv6 flow label, TCP congestion algorithm setting, sendfile / zerocopy, socket pacing
[root@localhost ]#
[root@localhost ]# iperf3 -h
Usage: iperf [-s|-c host] [options]
       iperf [-h|--help] [-v|--version]

Server or Client:
  -p, --port      #         server port to listen on/connect to
  -f, --format    [kmgKMG]  format to report: Kbits, Mbits, KBytes, MBytes
  -i, --interval  #         seconds between periodic bandwidth reports
  -F, --file name           xmit/recv the specified file
  -A, --affinity n/n,m      set CPU affinity
  -B, --bind      <host>    bind to a specific interface
  -V, --verbose             more detailed output
  -J, --json                output in JSON format
  --logfile f               send output to a log file
  --forceflush              force flushing output at every interval
  -d, --debug               emit debugging output
  -v, --version             show version information and quit
  -h, --help                show this message and quit
Server specific:
  -s, --server              run in server mode
  -D, --daemon              run the server as a daemon
  -I, --pidfile file        write PID file
  -1, --one-off             handle one client connection then exit
Client specific:
  -c, --client    <host>    run in client mode, connecting to <host>
  -u, --udp                 use UDP rather than TCP
  -b, --bandwidth #[KMG][/#] target bandwidth in bits/sec (0 for unlimited)
                            (default 1 Mbit/sec for UDP, unlimited for TCP)
                            (optional slash and packet count for burst mode)
  --fq-rate #[KMG]          enable fair-queuing based socket pacing in
                            bits/sec (Linux only)
  -t, --time      #         time in seconds to transmit for (default 10 secs)
  -n, --bytes     #[KMG]    number of bytes to transmit (instead of -t)
  -k, --blockcount #[KMG]   number of blocks (packets) to transmit (instead of -t or -n)
  -l, --len       #[KMG]    length of buffer to read or write
                            (default 128 KB for TCP, dynamic or 1 for UDP)
  --cport         <port>    bind to a specific client port (TCP and UDP, default: ephemeral port)
  -P, --parallel  #         number of parallel client streams to run
  -R, --reverse             run in reverse mode (server sends, client receives)
  -w, --window    #[KMG]    set window size / socket buffer size
  -C, --congestion <algo>   set TCP congestion control algorithm (Linux and FreeBSD only)
  -M, --set-mss   #         set TCP/SCTP maximum segment size (MTU - 40 bytes)
  -N, --no-delay            set TCP/SCTP no delay, disabling Nagle's Algorithm
  -4, --version4            only use IPv4
  -6, --version6            only use IPv6
  -S, --tos N               set the IP 'type of service'
  -L, --flowlabel N         set the IPv6 flow label (only supported on Linux)
  -Z, --zerocopy            use a 'zero copy' method of sending data
  -O, --omit N              omit the first n seconds
  -T, --title str           prefix every output line with this string
  --get-server-output       get results from server
  --udp-counters-64bit      use 64-bit counters in UDP test packets

[KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga-

iperf3 homepage at: http://software.es.net/iperf/
Report bugs to:     https://github.com/esnet/iperf
[root@localhost ]#

iperf官网地址：

iPerf - The TCP, UDP and SCTP network bandwidth measurement tool

iperf特性：

测量带宽

报告MSS/MTU大小和观察到的读数大小。

通过套接字缓冲区支持TCP窗口大小。

UDP

客户端可以创建指定带宽的UDP流。

测量数据包丢失

测量延迟抖动

支持多播

跨平台：Windows、Linux、Android、MacOS X、FreeBSD、OpenBSD、NetBSD、VxWorks、Solaris，。。。

客户端和服务器可以同时具有多个连接（-P选项）。

服务器处理多个连接，而不是在一次测试后退出。

可以运行指定的时间（-t选项），而不是要传输的数据量（-n或-k选项）。

以指定的间隔打印周期性、中间带宽、抖动和损耗报告（-i选项）。

将服务器作为守护程序运行（-D选项）

使用具有代表性的流来测试链路层压缩如何影响可实现的带宽（-F选项）。

服务器同时接受单个客户端（iPerf3）多个客户端同时接受（iPerf2）