Netperf是一种网络性能的测量工具，主要针对基于TCP或UDP的传输。Netperf根据应用的不同，可以进行不同模式的网络性能测试，即批量数据传输（bulk data transfer）模式和请求/应答（request/reponse）模式。
工作原理
Netperf工具以client/server方式工作。server端是netserver,用来侦听来自client端的连接,client端是netperf,用来向server发起网络测试.在client与server之间,首先建立一个控制连接,传递有关测试配置的信息,以及测试的结果:在控制连接建立并传递了测试配置信息以后，client与server之间会再建立一个测试连接,进行来回传递特殊的流量模式,以测试网络的性能
软件安装
- 下载安装Netperf工具
下载链接：ftp://ftp.netperf.org/netperf/
[root@xiesshavip001 ~]# wget ftp://ftp.netperf.org/netperf/netperf-2.7.0.tar.gz- 安装依赖包gcc cc
[root@xiesshavip001 ~]# yum install gcc cc -y- 解压安装
发行版Linux（CentOS7等）下编译和安装步骤如下：
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[root@xiesshavip001 ~]# tar -zxvf netperf-2.7.0.tar.gz [root@xiesshavip001 ~]#cd ./netperf-2.7.0/ [root@xiesshavip001 netperf-2.7.0]# ./configure [root@xiesshavip001 netperf-2.7.0]# cd ./src/ [root@xiesshavip001 netperf-2.7.0]# make [root@xiesshavip001 netperf-2.7.0]# make install
麒麟操作系统Linux（银河麒麟，搭配的是飞腾1500A 64位处理器）下编译和安装步骤如下：
[root@xiesshavip001 ~]# tar -zxvf netperf-2.7.0.tar.gz
[root@xiesshavip001 ~]#cd ./netperf-2.7.0/
[root@xiesshavip001 netperf-2.7.0]# ./configure –build=alpha //注释：此处指定编译平台为alpha
[root@xiesshavip001 netperf-2.7.0]# cd ./src/
[root@xiesshavip001 netperf-2.7.0]# make
[root@xiesshavip001 netperf-2.7.0]# make install
命令参数介绍
命令行参数包括如下选项：
-H host ：指定远端运行netserver的server IP地址。
-l testlen：指定测试的时间长度（秒）
-t testname：指定进行的测试类型，包括TCP_STREAM，UDP_STREAM，TCP_RR，TCP_CRR，UDP_RR
-s size 设置本地系统的socket发送与接收缓冲大小
-S size 设置远端系统的socket发送与接收缓冲大小
-m size 设置本地系统发送测试分组的大小
-M size 设置远端系统接收测试分组的大小
-D 对本地与远端系统的socket设置TCP_NODELAY选项netperf 网络测试
1、TCP_STREAM Netperf缺省情况下进行TCP批量传输,即-t TCP_STREAM。测试过程中,netperf向netserver发送批量的TCP数据分组,以确定数据传输过程中的吞吐量：
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[root@xiesshavip002 ~]# netserver # 服务端启动netserver 服务 Starting netserver with host 'IN(6)ADDR_ANY' port '12865' and family AF_UNSPEC [root@xiesshavip001 ~]# netperf -H 192.168.130.20 -l 60 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.130.20 () port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 60.01 935.66 [root@xiesshavip001 ~]# [root@xiesshavip001 ~]# netperf -H 192.168.130.20 -l 60 -- -m 10240 # 修改发送的包的大小 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.130.20 () port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 10240 60.02 937.58
2、UDP_STREAM UDP_STREAM用来测试进行UDP批量传输时的网络性能。注意:此时测试分组的大小不得大于socket的发送与接收缓冲大小，否则netperf会报出错提示：
[root@xiesshavip001 ~]# netperf -t UDP_STREAM -H 192.168.130.20 -l 10 MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.130.20 () port 0 AF_INET Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec 212992 65507 10.01 131286 0 6874.75 212992 10.01 1 0.05 [root@xiesshavip001 ~]# [root@xiesshavip001 ~]# netperf -t UDP_STREAM -H 192.168.130.20 -l 10 -- -m 300000 # 超过socket的发送与接收缓冲大212992 MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.130.20 () port 0 AF_INET send_data: data send error: Message too long (errno 90) netperf: send_omni: send_data failed: Message too long
3、TCP_RR TCP_RR方式的测试对象是多次TCP request和response的交易过程
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[root@xiesshavip001 ~]# netperf -t TCP_RR -H 192.168.130.20 MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.130.20 () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 8228.63 16384 87380
我们可以通过测试相关的参数来改变request和response分组的大小，TCP_RR方式下的参数如下表所示：
参数 说明 -r req,resp 设置request和reponse分组的大小 -s size 设置本地系统的socket发送与接收缓冲大小 -S size 设置远端系统的socket发送与接收缓冲大小 -D 对本地与远端系统的socket设置TCP_NODELAY选项 -
[root@xiesshavip001 ~]# netperf -t TCP_RR -H 192.168.130.20 -- -r 64 64 MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.130.20 () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 64 64 10.00 8143.22 16384 87380
4、TCP_CRR 与TCP_RR不同,TCP_CRR为每次交易建立一个新的TCP连接。
[root@xiesshavip001 ~]# netperf -t TCP_CRR -H 192.168.130.20 MIGRATED TCP Connect/Request/Response TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.130.20 () port 0 AF_INET Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 899.38 # 数值明显比TCP_RR值小 16384 87380
5、UDP_RR UDP_RR方式使用UDP分组进行request/response的交易过程
[root@xiesshavip001 ~]# netperf -t UDP_RR -H 192.168.130.20 MIGRATED UDP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.130.20 () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 212992 212992 1 1 10.00 8425.86 212992 212992
6、netperf 的命令使用帮助：netperf --help
[root@xiesshavip001 ~]# netperf --help netperf: invalid option -- '-' Usage: netperf [global options] -- [test options] Global options: -a send,recv Set the local send,recv buffer alignment -A send,recv Set the remote send,recv buffer alignment -B brandstr Specify a string to be emitted with brief output -c [cpu_rate] Report local CPU usage -C [cpu_rate] Report remote CPU usage -d Increase debugging output -D time,[units] * Display interim results at least every time interval using units as the initial guess for units per second A negative value for time will make heavy use of the system's timestamping functionality -f G|M|K|g|m|k Set the output units -F lfill[,rfill]* Pre-fill buffers with data from specified file -h Display this text -H name|ip,fam * Specify the target machine and/or local ip and family -i max,min Specify the max and min number of iterations (15,1) -I lvl[,intvl] Specify confidence level (95 or 99) (99) and confidence interval in percentage (10) -j Keep additional timing statistics -l testlen Specify test duration (>0 secs) (<0 bytes|trans) -L name|ip,fam * Specify the local ip|name and address family -o send,recv Set the local send,recv buffer offsets -O send,recv Set the remote send,recv buffer offset -n numcpu Set the number of processors for CPU util -N Establish no control connection, do 'send' side only -p port,lport* Specify netserver port number and/or local port -P 0|1 Don't/Do display test headers -r Allow confidence to be hit on result only -s seconds Wait seconds between test setup and test start -S Set SO_KEEPALIVE on the data connection -t testname Specify test to perform -T lcpu,rcpu Request netperf/netserver be bound to local/remote cpu -v verbosity Specify the verbosity level -W send,recv Set the number of send,recv buffers -v level Set the verbosity level (default 1, min 0) -V Display the netperf version and exit -y local,remote Set the socket priority -Y local,remote Set the IP_TOS. Use hexadecimal. -Z passphrase Set and pass to netserver a passphrase For those options taking two parms, at least one must be specified; specifying one value without a comma will set both parms to that value, specifying a value with a leading comma will set just the second parm, a value with a trailing comma will set just the first. To set each parm to unique values, specify both and separate them with a comma. * For these options taking two parms, specifying one value with no comma will only set the first parms and will leave the second at the default value. To set the second value it must be preceded with a comma or be a comma-separated pair. This is to retain previous netperf behaviour.
参考链接：
1、源代码和帮助文档