Iperf[转]

原文链接：https://openmaniak.com/iperf.php

Iperf is a tool to measure the bandwidth and the quality of a network link. Jperf can be associated with Iperf to provide a graphical frontend written in Java.

The network link is delimited by two hosts running Iperf.

The quality of a link can be tested as follows:
- Latency (response time or RTT): can be measured with the Ping command.
- Jitter (latency variation): can be measured with an Iperf UDP test.
- Datagram loss: can be measured with an Iperf UDP test.

The bandwidth is measured through TCP tests.

To be clear, the difference between TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) is that TCP use processes to check that the packets are correctly sent to the receiver whereas with UDP the packets are sent without any checks but with the advantage of being quicker than TCP.
Iperf uses the different capacities of TCP and UDP to provide statistics about network links.

Finally, Iperf can be installed very easily on any UNIX/Linux or Microsoft Windows system. One host must be set as client, the other one as server.

Here is a diagram where Iperf is installed on a Linux and Microsoft Windows machine.
Linux is used as the Iperf client and Windows as the Iperf server. Of course, it is also possible to use two Linux boxes.

Iperf tests:

no arg.
-b
-r
-d
-w

Default settings
Data format
Bi-directional bandwidth
Simultaneous bi-directional bandwidth
TCP Window size

-p, -t, -i
-u, -b
-m
-M
-P
-h

Port, timing and interval
UDP tests, bandwidth settings
Maximum Segment Size display
Maximum Segment Size settings
Parallel tests
help

Jperf:

no arg.
-d
-u, -b

Default settings
Simultaneous bi-directional bandwidth
UDP tests, bandwidth settings

Default Iperf settings:
Also check "Jperf section.

By default, the Iperf client connects to the Iperf server on the TCP port 5001 and the bandwidth displayed by Iperf is the bandwidth from the client to the server.
If you want to use UDP tests, use the -u argument.
The -d and -r Iperf client arguments measure the bi-directional bandwidths. (See further on this tutorial)

Client side:

#iperf -c 10.1.1.1

------------------------------------------------------------
Client connecting to 10.1.1.1, TCP port 5001
TCP window size: 16384 Byte (default)
------------------------------------------------------------
[ 3] local 10.6.2.5 port 33453 connected with 10.1.1.1 port 5001
[ 3] 0.0-10.2 sec 1.26 MBytes 1.05 Mbits/sec

Server side:

#iperf -s

Data formatting: (-f argument)

The -f argument can display the results in the desired format: bits(b), bytes(B), kilobits(k), kilobytes(K), megabits(m), megabytes(M), gigabits(g) or gigabytes(G).
Generally the bandwidth measures are displayed in bits (or Kilobits, etc ...) and an amount of data is displayed in bytes (or Kilobytes, etc ...).
As a reminder, 1 byte is equal to 8 bits and, in the computer science world, 1 kilo is equal to 1024 (2^10).
For example: 100'000'000 bytes is not equal to 100 Mbytes but to 100'000'000/1024/1024 = 95.37 Mbytes.

Client side:

#iperf -c 10.1.1.1 -f b

------------------------------------------------------------
Client connecting to 10.1.1.1, TCP port 5001
TCP window size: 16384 Byte (default)
------------------------------------------------------------
[ 3] local 10.6.2.5 port 54953 connected with 10.1.1.1 port 5001
[ 3] 0.0-10.2 sec 1359872 Bytes 1064272 bits/sec

Server side:

#iperf -s

Bi-directional bandwidth measurement: (-r argument)

The Iperf server connects back to the client allowing the bi-directional bandwidth measurement. By default, only the bandwidth from the client to the server is measured.
If you want to measure the bi-directional bandwidth simultaneously, use the -d keyword. (See next test.)

Client side:

#iperf -c 10.1.1.1 -r

------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 10.1.1.1, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 5] local 10.6.2.5 port 35726 connected with 10.1.1.1 port 5001
[ 5] 0.0-10.0 sec 1.12 MBytes 936 Kbits/sec
[ 4] local 10.6.2.5 port 5001 connected with 10.1.1.1 port 1640
[ 4] 0.0-10.1 sec 74.2 MBytes 61.7 Mbits/sec

Server side:

#iperf -s

------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 8.00 KByte (default)
------------------------------------------------------------
[852] local 10.1.1.1 port 5001 connected with 10.6.2.5 port 54355
[ ID]   Interval          Transfer        Bandwidth
[852]   0.0-10.1 sec   1.15 MBytes   956 Kbits/sec
------------------------------------------------------------
Client connecting to 10.6.2.5, TCP port 5001
TCP window size: 8.00 KByte (default)
------------------------------------------------------------
[824] local 10.1.1.1 port 1646 connected with 10.6.2.5 port 5001
[ ID]   Interval          Transfer        Bandwidth
[824]   0.0-10.0 sec   73.3 MBytes   61.4 Mbits/sec

Top of the page

Simultaneous bi-directional bandwidth measurement: (-d argument)
Also check the "Jperf" section.

To measure the bi-directional bandwidths simultaneousely, use the -d argument. If you want to test the bandwidths sequentially, use the -r argument (see previous test).
By default (ie: without the -r or -d arguments), only the bandwidth from the client to the server is measured.

Client side:

#iperf -c 10.1.1.1 -d

------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 10.1.1.1, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 5] local 10.6.2.5 port 60270 connected with 10.1.1.1 port 5001
[ 4] local 10.6.2.5 port 5001 connected with 10.1.1.1 port 2643
[ 4] 0.0-10.0 sec 76.3 MBytes 63.9 Mbits/sec
[ 5] 0.0-10.1 sec 1.55 MBytes 1.29 Mbits/sec

Server side:

#iperf -s

------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 8.00 KByte (default)
------------------------------------------------------------
[852] local 10.1.1.1 port 5001 connected with 10.6.2.5 port 60270
------------------------------------------------------------
Client connecting to 10.6.2.5, TCP port 5001
TCP window size: 8.00 KByte (default)
------------------------------------------------------------
[800] local 10.1.1.1 port 2643 connected with 10.6.2.5 port 5001
[ ID]   Interval          Transfer       Bandwidth
[800]   0.0-10.0 sec   76.3 MBytes   63.9 Mbits/sec
[852]   0.0-10.1 sec   1.55 MBytes   1.29 Mbits/sec

Top of the page

TCP Window size: (-w argument)

The TCP window size is the amount of data that can be buffered during a connection without a validation from the receiver.
It can be between 2 and 65,535 bytes.
On Linux systems, when specifying a TCP buffer size with the -w argument, the kernel allocates double as much as indicated.

Client side:

#iperf -c 10.1.1.1 -w 2000

WARNING: TCP window size set to 2000 bytes. A small window size
will give poor performance. See the Iperf documentation.
------------------------------------------------------------
Client connecting to 10.1.1.1, TCP port 5001
TCP window size: 3.91 KByte (WARNING: requested 1.95 KByte)
------------------------------------------------------------
[ 3] local 10.6.2.5 port 51400 connected with 10.1.1.1 port 5001
[ 3] 0.0-10.1 sec 704 KBytes 572 Kbits/sec

Server side:

#iperf -s -w 4000

------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 3.91 KByte
------------------------------------------------------------
[852] local 10.1.1.1 port 5001 connected with 10.6.2.5 port 51400
[ ID] Interval Transfer Bandwidth
[852] 0.0-10.1 sec 704 KBytes 570 Kbits/sec

Top of the page

Communication port (-p), timing (-t) and interval (-i):

The Iperf server communication port can be changed with the -p argument. It must be configured on the client and the server with the same value, default is TCP port 5001.
The -t argument specifies the test duration time in seconds, default is 10 secs.
The -i argument indicates the interval in seconds between periodic bandwidth reports.

Client side:

#iperf -c 10.1.1.1 -p 12000 -t 20 -i 2

------------------------------------------------------------
Client connecting to 10.1.1.1, TCP port 12000
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.6.2.5 port 58316 connected with 10.1.1.1 port 12000
[ 3]    0.0- 2.0 sec    224 KBytes    918 Kbits/sec
[ 3]    2.0- 4.0 sec    368 KBytes    1.51 Mbits/sec
[ 3]    4.0- 6.0 sec    704 KBytes    2.88 Mbits/sec
[ 3]    6.0- 8.0 sec    280 KBytes    1.15 Mbits/sec
[ 3]    8.0-10.0 sec    208 KBytes    852 Kbits/sec
[ 3]   10.0-12.0 sec   344 KBytes    1.41 Mbits/sec
[ 3]   12.0-14.0 sec   208 KBytes    852 Kbits/sec
[ 3]   14.0-16.0 sec   232 KBytes    950 Kbits/sec
[ 3]   16.0-18.0 sec   232 KBytes    950 Kbits/sec
[ 3]   18.0-20.0 sec   264 KBytes    1.08 Mbits/sec
[ 3]    0.0-20.1 sec   3.00 MBytes   1.25 Mbits/sec

Server side:

#iperf -s -p 12000

------------------------------------------------------------
Server listening on TCP port 12000
TCP window size: 8.00 KByte (default)
------------------------------------------------------------
[852] local 10.1.1.1 port 12000 connected with 10.6.2.5 port 58316
[ ID] Interval Transfer Bandwidth
[852] 0.0-20.1 sec 3.00 MBytes 1.25 Mbits/sec

Top of the page

UDP tests: (-u), bandwidth settings (-b)
Also check the "Jperf" section.

The UDP tests with the -u argument will give invaluable information about the jitter and the packet loss. If you don't specify the -u argument, Iperf uses TCP.
To keep a good link quality, the packet loss should not go over 1 %. A high packet loss rate will generate a lot of TCP segment retransmissions which will affect the bandwidth.

The jitter is basically the latency variation and does not depend on the latency. You can have high response times and a very low jitter. The jitter value is particularly important on network links supporting voice over IP (VoIP) because a high jitter can break a call.
The -b argument allows the allocation if the desired bandwidth.

Client side:

#iperf -c 10.1.1.1 -u -b 10m

------------------------------------------------------------
Client connecting to 10.1.1.1, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 108 KByte (default)
------------------------------------------------------------
[ 3] local 10.6.2.5 port 32781 connected with 10.1.1.1 port 5001
[ 3] 0.0-10.0 sec 11.8 MBytes 9.89 Mbits/sec
[ 3] Sent 8409 datagrams
[ 3] Server Report:
[ 3] 0.0-10.0 sec 11.8 MBytes 9.86 Mbits/sec 2.617 ms 9/ 8409 (0.11%)

Server side:

#iperf -s -u -i 1

------------------------------------------------------------
Server listening on UDP port 5001
Receiving 1470 byte datagrams
UDP buffer size: 8.00 KByte (default)
------------------------------------------------------------
[904] local 10.1.1.1 port 5001 connected with 10.6.2.5 port 32781
[ ID]   Interval         Transfer        Bandwidth         Jitter        Lost/Total Datagrams
[904]   0.0- 1.0 sec   1.17 MBytes   9.84 Mbits/sec   1.830 ms   0/ 837   (0%)
[904]   1.0- 2.0 sec   1.18 MBytes   9.94 Mbits/sec   1.846 ms   5/ 850   (0.59%)
[904]   2.0- 3.0 sec   1.19 MBytes   9.98 Mbits/sec   1.802 ms   2/ 851   (0.24%)
[904]   3.0- 4.0 sec   1.19 MBytes   10.0 Mbits/sec   1.830 ms   0/ 850   (0%)
[904]   4.0- 5.0 sec   1.19 MBytes   9.98 Mbits/sec   1.846 ms   1/ 850   (0.12%)
[904]   5.0- 6.0 sec   1.19 MBytes   10.0 Mbits/sec   1.806 ms   0/ 851   (0%)
[904]   6.0- 7.0 sec   1.06 MBytes   8.87 Mbits/sec   1.803 ms   1/ 755   (0.13%)
[904]   7.0- 8.0 sec   1.19 MBytes   10.0 Mbits/sec   1.831 ms   0/ 850   (0%)
[904]   8.0- 9.0 sec   1.19 MBytes   10.0 Mbits/sec   1.841 ms   0/ 850   (0%)
[904]   9.0-10.0 sec   1.19 MBytes   10.0 Mbits/sec   1.801 ms   0/ 851   (0%)
[904]   0.0-10.0 sec   11.8 MBytes   9.86 Mbits/sec   2.618 ms   9/ 8409  (0.11%)

Top of the page

Maximum Segment Size (-m argument) display:

The Maximum Segment Size (MSS) is the largest amount of data, in bytes, that a computer can support in a single, unfragmented TCP segment.
It can be calculated as follows:
MSS = MTU - TCP & IP headers
The TCP & IP headers are equal to 40 bytes.
The MTU or Maximum Transmission Unit is the greatest amount of data that can be transferred in a frame.
Here are some default MTU size for different network topology:
Ethernet - 1500 bytes: used in a LAN.
PPPoE - 1492 bytes: used on ADSL links.
Token Ring (16Mb/sec) - 17914 bytes: old technology developed by IBM.
Dial-up - 576 bytes

Generally, a higher MTU (and MSS) brings higher bandwidth efficiency

Client side:

#iperf -c 10.1.1.1 -m

------------------------------------------------------------
Client connecting to 10.1.1.1, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.6.2.5 port 41532 connected with 10.1.1.1 port 5001
[ 3] 0.0-10.2 sec 1.27 MBytes 1.04 Mbits/sec
[ 3] MSS size 1448 bytes (MTU 1500 bytes, ethernet)

Here the MSS is not equal to 1500 - 40 but to 1500 - 40 - 12 (Timestamps option) = 1448

Server side:

#iperf -s

Top of the page

Maximum Segment Size (-M argument) settings:

Use the -M argument to change the MSS. (See the previous test for more explanations about the MSS)

#iperf -c 10.1.1.1 -M 1300 -m

WARNING: attempt to set TCP maximum segment size to , but got 536
------------------------------------------------------------
Client connecting to 10.1.1.1, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.6.2.5 port 41533 connected with 10.1.1.1 port 5001
[ 3] 0.0-10.1 sec 4.29 MBytes 3.58 Mbits/sec
[ 3] MSS size 1288 bytes (MTU 1328 bytes, unknown interface)

Server side:

#iperf -s

Top of the page

Parallel tests (-P argument):

Use the -P argument to run parallel tests.

Client side:

#iperf -c 10.1.1.1 -P 2

------------------------------------------------------------
Client connecting to 10.1.1.1, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.6.2.5 port 41534 connected with 10.1.1.1 port 5001
[ 4] local 10.6.2.5 port 41535 connected with 10.1.1.1 port 5001
[ 4]     0.0-10.1 sec   1.35 MBytes   1.12 Mbits/sec
[ 3]     0.0-10.1 sec   1.35 MBytes   1.12 Mbits/sec
[SUM]  0.0-10.1 sec   2.70 MBytes   2.24 Mbits/sec

Server side:

#iperf -s

Top of the page

Iperf help:

#iperf -h

Usage: iperf [-s|-c host] [options]
iperf [-h|--help] [-v|--version]

Client/Server:

-f
-i
-l
-m
-p
-u
-w
-B
-C
-M
-N
-V

--format
--interval
--len
--print_mss
--port
--udp
--window
--bind
--compatibility
--mss
--nodelay
--IPv6Version

[kmKM]
#
#[KM]

#

#[KM]
"host"

#

format to report: Kbits, Mbits, KBytes, MBytes
seconds between periodic bandwidth reports
length of buffer to read or write (default 8 KB)
print TCP maximum segment size (MTU - TCP/IP header)
server port to listen on/connect to
use UDP rather than TCP
TCP window size (socket buffer size)
bind to "host", an interface or multicast address
for use with older versions does not sent extra msgs
set TCP maximum segment size (MTU - 40 bytes)
set TCP no delay, disabling Nagle's Algorithm
Set the domain to IPv6

Server specific:

-s
-U
-D

--server
--single_udp
--daemon

run in server mode
run in single threaded UDP mode
run the server as a daemon

Client specific:

-b
-c
-d
-n
-r
-t
-F
-I
-L
-P
-T

--bandwidth
--client
--dualtest
--num
--tradeoff
--time
--fileinput
--stdin
--listenport
--parallel
--ttl

#[KM]
"host"

#[KM]

#
"name"

#
#
#

for UDP, bandwidth to send at in bits/sec (default 1 Mbit/sec, implies -u)
run in client mode, connecting to "host"
Do a bidirectional test simultaneously
number of bytes to transmit (instead of -t)
Do a bidirectional test individually
time in seconds to transmit for (default 10 secs)
input the data to be transmitted from a file
input the data to be transmitted from stdin
port to recieve bidirectional tests back on
number of parallel client threads to run
time-to-live, for multicast (default 1)

Miscellaneous:

-h
-v

--help
--version

print this message and quit
print version information and quit

Top of the page

JPERF

Jperf is a graphical frontend for Iperf written in Java.

1. Installation:

Download Jperf.

Linux

Uncompress the downloaded file:

#tar -xvf jperf2.0.0.zip

Launch Jperf.

#cd jperf2.0.0
#./jperf.sh

If you have the following message, it means that you need to install Iperf with: "apt-get install iperf"

Iperf is probably not in your Path!
Please download it here 'http://dast.nlanr.net/Projects/Iperf/'
and put the executable in your PATH environment variable.

Microsoft Windows

Uncompress the downloaded file with your favorite program.
Access the uncompressed folder called by default "jperf2.0.0" and double-click on "jperf.bat".
Note that the iperf utility is already present in the /bin folder.

2. Examples:

Default settings, bandwidth measurement:
Also check "Iperf" section for more details.

- Linux client:

- Windows server:

Top of the page Jperf

Simultaneous bi-directional bandwidth measurement:
Also check "Iperf" section for more details.

- Linux client:

- Windows server:

Top of the page Jperf

Jitter measurement:
Also check "Iperf" section for more details.

- Linux client:

- Windows server:

Iperf[转]的更多相关文章

mininet中iperf sever自动退出
使用iperf 在mininet进行吞吐量测试是常用的方法,之前结束iperf server的方法是运行os.system('pkill iperf')命令. 但是这种方式iperf server有可 ...
Linux 下测试网卡性能命令iperf 的用法
很多文件系统都自带iperf 命令,所以不用作多的移植工作. 如下查看他的帮助信息. Qt@aplex:~$ iperf -h Usage: iperf [-s|-c host] [options] ...
iperf交叉编译：
下载:http://sourceforge.net/projects/iperf 1. 先把iperf-2.0.4.tar.gz解压到你的目录下.2. cd iperf-2.0.43. ./confi ...
Ubuntu下iperf的安装
(1)下载链接:http://sourceforge.net/projects/iperf/files/?source=navbar 资源:iperf-2.0.5.tar.gz (2)解压 #t ...
利用netperf、iperf、mtr测试网络
1.netperf安装和使用 netperf安装 # tar -xzvf netperf-.tar.gz # cd netperf- # ./configure # make # make insta ...
网络性能测试工具iperf详细使用图文教程
Iperf是一个网络性能测试工具.Iperf可以测试TCP和UDP带宽质量.Iperf可以测量最大TCP带宽,具有多种参数和UDP特性. Iperf可以报告带宽,延迟抖动和数据包丢失.利用Iper ...
iperf测试
在服务端运行iperf,输入命令iperf –s –p 12345 –i 1 –M 以在本机端口12345上启用iperf 在客户端运行iperf,输入命令iperf –c server-ip –p ...
网络性能测试工具iperf详细使用图文教程【转载】
原文:http://blog.163.com/hlz_2599/blog/static/142378474201341341339314/ 参考:http://man.linuxde.net/iper ...
iPerf - The network bandwidth measurement tool
What is iPerf / iPerf3 ? iPerf3 is a tool for active measurements of the maximum achievable bandwidt ...
Iperf使用方法
Iperf使用方法 Iperf 是一个网络性能测试工具.Iperf可以测试TCP和UDP带宽质量.Iperf可以测量最大TCP带宽,具有多种参数和UDP特性.Iperf可以报告带宽,延迟抖动和数据包 ...

随机推荐

ios中mvc的FormsAuthentication.SetAuthCookie(cookieUserName, false)失败
如果楼主使用.net开发,要注意FormsAuthentication.SetAuthCookie 方法的使用会导致ios出现该问题.因为这个方法在ios设备上是把票据加入到url中,导致url和你的 ...
NET 类库
NET 类库研究必备参考扣丁格鲁 .NET 类库的强大让我们很轻松的解决常见问题,作为一个好专研的程序员,为了更上一层楼,研究CLR的基础类库实现是快速稳定的捷径. 一般场景下,采用 Reflect ...
c# 即使服务又是可执行程序的代码实现
先看下代码 namespace UpdaterServer { class Program { static void Main(string[] args) { ) { ServiceBase[] ...
dyld binding test
========================================================================= a.c ---------------------- ...
c语言，递归翻转一个单链表，c实现单链表
目的:主要是练习c里面单链表的实现,递归思想复习; #include <stdlib.h> #include <stdio.h> typedef struct _Node{// ...
MySQL的数据类型，MySQL增删改--添加主外键、添加属性、删除主外键、改表名、获取系统当前时间等
ls /etc/rc.d/init.d/mysql56service mysql56 start ps aux |grep "mysql"|grep "socket=&q ...
win32多线程-重写消息循环
最近正在学习<win32多线程程序设计>,这是其中一段重写消息循环的代码事例,以后可能用的上. while (!quit || gNumPrinting > 0) { // Wait ...
移动收入超PC端盛大文学战略转型初见成效
随着智能手机和平板电脑的普及,越来越多的互联网服务也开始向移动端拓展,除了传统的互联网服务如搜索.即时通信之外,网络文学这项新兴的互联网业务也没忽视对移动端的布局. 7月9日,中国最大的网络文学出版平 ...
java对数据库的操作
package com.DateSystem; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLEx ...
Python学习入门基础教程(learning Python)--2.3.3Python函数型参详解
本节讨论Python下函数型参的预设值问题. Python在设计函数时,可以给型参预设缺省值,当用户调用函数时可以不输入实参.如果用户不想使用缺省预设值则需要给型参一一赋值,可以给某些型参赋值或不按型 ...

Iperf[转]

Iperf[转]的更多相关文章

随机推荐

热门专题