最近移植了Ralink的rt5370的USB wifi 驱动, ld要求测试一下性能,与先前的sdio wifi进行比较。
使用iperf工具。 ierf的用法如下所示:
Usage: iperf [-s|-c host] [options]
iperf [-h|--help] [-v|--version]Client/Server:
-f, --format [kmKM] format to report: Kbits, Mbits, KBytes, MBytes
-i, --interval # seconds between periodic bandwidth reports
-l, --len #[KM] length of buffer to read or write (default 8 KB)
-m, --print_mss print TCP maximum segment size (MTU - TCP/IP header)
-o, --output <filename> output the report or error message to this specified file
-p, --port # server port to listen on/connect to
-u, --udp use UDP rather than TCP
-w, --window #[KM] TCP window size (socket buffer size)
-B, --bind <host> bind to <host>, an interface or multicast address
-C, --compatibility for use with older versions does not sent extra msgs
-M, --mss # set TCP maximum segment size (MTU - 40 bytes)
-N, --nodelay set TCP no delay, disabling Nagle's Algorithm
-V, --IPv6Version Set the domain to IPv6Server specific:
-s, --server run in server mode
-U, --single_udp run in single threaded UDP mode
-D, --daemon run the server as a daemonClient specific:
-b, --bandwidth #[KM] for UDP, bandwidth to send at in bits/sec
(default 1 Mbit/sec, implies -u)
-c, --client <host> run in client mode, connecting to <host>
-d, --dualtest Do a bidirectional test simultaneously
-n, --num #[KM] number of bytes to transmit (instead of -t)
-r, --tradeoff Do a bidirectional test individually
-t, --time # time in seconds to transmit for (default 10 secs)
-F, --fileinput <name> input the data to be transmitted from a file
-I, --stdin input the data to be transmitted from stdin
-L, --listenport # port to recieve bidirectional tests back on
-P, --parallel # number of parallel client threads to run
-T, --ttl # time-to-live, for multicast (default 1)
-Z, --linux-congestion <algo> set TCP congestion control algorithm (Linux only)Miscellaneous:
-x, --reportexclude [CDMSV] exclude C(connection) D(data) M(multicast) S(settings) V(server) reports
-y, --reportstyle C report as a Comma-Separated Values
-h, --help print this message and quit
-v, --version print version information and quit
首先板子联网:
arm-linux$ mkdir /etc/Wireless
arm-linux$ mkdir /etc/Wireless/RT2870STA
arm-linux$ cp /mnt/RT2870STA.dat /etc/Wireless/RT2870STA/
arm-linux$ ifconfig ra0 inet 192.168.1.44 up
arm-linux$ iwpriv ra0 set SSID="NewNet"
arm-linux$ route add default gw 192.168.1.1arm-linux$ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: seq=0 ttl=64 time=9.709 ms
64 bytes from 192.168.1.1: seq=1 ttl=64 time=5.316 ms
64 bytes from 192.168.1.1: seq=2 ttl=64 time=3.661 ms
64 bytes from 192.168.1.1: seq=3 ttl=64 time=3.526 ms
--- 192.168.1.1 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 3.526/5.553/9.709 ms
无线AP已经通过RJ45接到公司内网,尝试ping一下内网的linux服务器(11.7.16.108):
arm-linux$ ping 11.7.16.108
PING 11.7.16.108 (11.7.16.108): 56 data bytes
64 bytes from 11.7.16.108: seq=0 ttl=63 time=10.555 ms
64 bytes from 11.7.16.108: seq=1 ttl=63 time=3.249 ms
64 bytes from 11.7.16.108: seq=2 ttl=63 time=3.118 ms
64 bytes from 11.7.16.108: seq=3 ttl=63 time=3.641 ms
64 bytes from 11.7.16.108: seq=4 ttl=63 time=6.906 ms
^Z[7]+ Stopped ping 11.7.16.108
OK, 通了,可以使用iperf工具了:
1, 工作电脑(WIN7)通过putty登录11.7.16.108,
$ iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
2, 开发板
arm-linux$ iperf -c 11.7.16.108
------------------------------------------------------------
Client connecting to 11.7.16.108, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.1.44 port 42700 connected with 11.7.16.108 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.1 sec 10.8 MBytes 8.95 Mbits/sec
arm-linux$ iperf -c 11.7.16.108 -i 2
------------------------------------------------------------
Client connecting to 11.7.16.108, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.1.44 port 42701 connected with 11.7.16.108 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 2.0 sec 2.12 MBytes 8.91 Mbits/sec
[ 3] 2.0- 4.0 sec 2.12 MBytes 8.91 Mbits/sec
[ 3] 4.0- 6.0 sec 2.00 MBytes 8.39 Mbits/sec
[ 3] 6.0- 8.0 sec 2.25 MBytes 9.44 Mbits/sec
[ 3] 8.0-10.0 sec 2.25 MBytes 9.44 Mbits/sec
[ 3] 0.0-10.1 sec 10.9 MBytes 9.08 Mbits/sec
测出来啦,带宽也就8-9M的样子。
上面测出来的是TCP的带宽,要测UDP带宽,在客户端要使用-b参数:
使用iperf的-b参数可以指定带宽大小,请注意这个指定的带宽大小并不是我们要测试的网络的带宽,我们测试的网络的带宽是最大值。
要获得带宽数据,需要通过-b不断在client端增加带宽值,直到server端出现轻微的丢包为止,此时server端显示的带宽就是被测系统的吞吐量。
不指定-b参数的话,默认是1M,所以测出来的结果会是1Mbps
例如: iperf -c 192.168.1.102 -u -b 5M 执行结果是,只有3Mbps
------------------------------------------------------------
Client connecting to 192.168.1.100, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 32.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.1.104 port 33027 connected with 192.168.1.100 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 3.59 MBytes 3.00 Mbits/sec
[ 3] Sent 2561 datagrams
[ 3] Server Report:
[ 3] 0.0-10.1 sec 3.59 MBytes 2.99 Mbits/sec 7.435 ms 0/ 2560 (0%)
[ 3] 0.0-10.1 sec 1 datagrams received out-of-order
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-------------------------------------------------------- More Infomation ----------------------------------------------------------------------------------------------------------
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perf是一个网络性能测试工具。可以测试TCP和UDP带宽质量,可以测量最大TCP带宽,具有多种参数和UDP特性,可以报告带宽,延迟抖动和数据包丢失。Iperf在linux和windows平台均有二进制版本供自由使用。
Iperf was developed by NLANRDAST as a modern alternative for measuring maximum TCP and UDP bandwidth performance. Iperf allows the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, datagram loss.
Iperf使用方法与参数说明
参数说明
-s 以server模式启动,eg:iperf -s
-c host以client模式启动,host是server端地址,eg:iperf -c 222.35.11.23
通用参数
-f [kmKM] 分别表示以Kbits, Mbits, KBytes, MBytes显示报告,默认以Mbits为单位,eg:iperf -c 222.35.11.23 -f K
-i sec 以秒为单位显示报告间隔,eg:iperf -c 222.35.11.23 -i 2
-l 缓冲区大小,默认是8KB,eg:iperf -c 222.35.11.23 -l 16
-m 显示tcp最大mtu值
-o 将报告和错误信息输出到文件eg:iperf -c 222.35.11.23 -o ciperflog.txt
-p 指定服务器端使用的端口或客户端所连接的端口eg:iperf -s -p 9999;iperf -c 222.35.11.23 -p 9999
-u 使用udp协议
-w 指定TCP窗口大小,默认是8KB
-B 绑定一个主机地址或接口(当主机有多个地址或接口时使用该参数)
-C 兼容旧版本(当server端和client端版本不一样时使用)
-M 设定TCP数据包的最大mtu值
-N 设定TCP不延时
-V 传输ipv6数据包
server专用参数
-D 以服务方式运行iperf,eg:iperf -s -D
-R 停止iperf服务,针对-D,eg:iperf -s -R
client端专用参数
-d 同时进行双向传输测试
-n 指定传输的字节数,eg:iperf -c 222.35.11.23 -n 100000
-r 单独进行双向传输测试
-t 测试时间,默认10秒,eg:iperf -c 222.35.11.23 -t 5
-F 指定需要传输的文件
-T 指定ttl值
应用实例
使用 iperf -s 命令将 Iperf 启动为 server 模式,在客户机上使用 iperf -c启动client模式。
iperf –s
————————————————————
Server listening on TCP port 5001
TCP window size: 8.00 KByte (default)
————————————————————
iperf -c 59.128.103.56
上面使用服务端和客户端的默认设置进行测试
iperf -s -w 300K
————————————————————
Server listening on TCP port 5001
TCP window size: 300 KByte
————————————————————
iperf -c 59.128.103.56 -f K -i 2 -w 300K 设定报告间隔为2秒,服务器端和客户端的TCP窗口都开到300KB
iperf -c 59.128.103.56 -f K -i 2 -w 300K –n 1000000 测试传输约1MB数据
iperf -c 59.128.103.56 -f K -i 2 -w 300K –t 36 测试持续36秒
iperf -c 59.128.103.56 -f K -i 2 -w 300K -n 10400000 –d 测试双向的传输
iperf -c 59.128.103.56 -f K -i 2 -w 300K –u UDP测试
其中 -i 参数的含义是周期性报告的时间间隔(interval),单位为秒;在上面的例子中,表示每隔2秒报告一次带宽等信息。
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