性能检测工具安装

# curl -O http://downloads.es.net/pub/iperf/iperf-3.0.6.tar.gz

# tar axf iperf-3.0.6.tar.gz

# cd iperf-3.0.6

# ./bootstrap.sh

# ./configure

# make -j $(nproc)

# make install

基本命令

### 网卡参数查询

# ethtool -k <dev>

### 网卡参数配置

# ethtool -K <dev> <tso/gso/gro/ufo> <on/off>

### 启动监听服务

# iperf3 -s

### 发送测试数据

# iperf3 -c <srv> -l <size>

### 网卡抓包

# tcpdump -i <dev> <udp/tcp> -v

测试

测试环境网络拓扑

br-ex用于ssh连接，br-mgmt上网卡用于测试

不启用GSO/GIO

网卡配置

Host A

选项 状态
tcp-segmentation-offload off
generic-segmentation-offload off
generic-receive-offload off
udp-fragmentation-offload off

Host B

选项 状态
tcp-segmentation-offload off
generic-segmentation-offload off
generic-receive-offload off
udp-fragmentation-offload off

测试步骤

### Host B

# tcpdump -i em1 tcp -v

# iperf3 -s

### Host A

# tcpdump -i eno1 tcp -v

# iperf3 -c 92.0.0.240 -l 2000

### 测试部分结果如下Host A & Host B相同

14:11:12.099562 IP (tos 0x0, ttl 64, id 35338, offset 0, flags [DF], proto TCP (6), length 1500)

    host-92-0-0-240.as43234.net.47050 > host-92-0-0-241.as43234.net.targus-getdata1: Flags [.], cksum 0xbfaf (incorrect -> 0x686c), seq 33370646:33372094, ack 1, win 229, options [nop,nop,TS val 13486141 ecr 13531163], length 1448

14:11:12.099563 IP (tos 0x0, ttl 64, id 35339, offset 0, flags [DF], proto TCP (6), length 1500)

    host-92-0-0-240.as43234.net.47050 > host-92-0-0-241.as43234.net.targus-getdata1: Flags [.], cksum 0xbfaf (incorrect -> 0x2b13), seq 33372094:33373542, ack 1, win 229, options [nop,nop,TS val 13486141 ecr 13531163], length 1448

14:11:12.099804 IP (tos 0x0, ttl 64, id 63470, offset 0, flags [DF], proto TCP (6), length 52)

    host-92-0-0-241.as43234.net.targus-getdata1 > host-92-0-0-240.as43234.net.47050: Flags [.], cksum 0xadf6 (correct), ack 33359062, win 1720, options [nop,nop,TS val 13531164 ecr 13486140], length 0

### 通过测试结果可以看出，2000字节的数据包被拆分成两个包

启用TSO/GSO/GIO

网卡配置

Host A

选项 状态
tcp-segmentation-offload on
generic-segmentation-offload on
generic-receive-offload on
udp-fragmentation-offload off

Host B

选项 状态
tcp-segmentation-offload on
generic-segmentation-offload on
generic-receive-offload on
udp-fragmentation-offload off

测试步骤

### Host B

# tcpdump -i em1 tcp -v

# iperf3 -c 92.0.0.240 -l 5000

### Host A

# tcpdump -i eno1 tcp -v

# iperf3 -s

### 测试部分结果如下

### Host B（发送端seq 41190502:41213670）

    host-92-0-0-241.as43234.net.43976 > host-92-0-0-240.as43234.net.targus-getdata1: Flags [.], cksum 0x1488 (incorrect -> 0x9555), seq 41190502:41213670, ack 1, win 229, options [nop,nop,TS val 15504851 ecr 15459784], length 23168

15:12:09.859303 IP (tos 0x0, ttl 64, id 62667, offset 0, flags [DF], proto TCP (6), length 52)

    host-92-0-0-240.as43234.net.targus-getdata1 > host-92-0-0-241.as43234.net.43976: Flags [.], cksum 0x3bc8 (correct), ack 40724246, win 16852, options [nop,nop,TS val 15459784 ecr 15504810], length 0

15:12:09.859553 IP (tos 0x0, ttl 64, id 62668, offset 0, flags [DF], proto TCP (6), length 52)

    host-92-0-0-240.as43234.net.targus-getdata1 > host-92-0-0-241.as43234.net.43976: Flags [.], cksum 0x3078 (correct), ack 40727142, win 16852, options [nop,nop,TS val 15459784 ecr 15504810], length 0

### Host A

14:44:05.781627 IP (tos 0x0, ttl 64, id 28209, offset 0, flags [DF], proto TCP (6), length 1500)

    host-92-0-0-241.as43234.net.43976 > host-92-0-0-240.as43234.net.targus-getdata1: Flags [.], cksum 0xc904 (correct), seq 41190502:41191950, ack 1, win 229, options [nop,nop,TS val 15504851 ecr 15459784], length 1448

14:44:05.781631 IP (tos 0x0, ttl 64, id 29535, offset 0, flags [DF], proto TCP (6), length 40)

    host-92-0-0-240.as43234.net.targus-getdata1 > host-92-0-0-241.as43234.net.43976: Flags [R], cksum 0x80af (correct), seq 1314350815, win 0, length 0

14:44:05.781872 IP (tos 0x0, ttl 64, id 28210, offset 0, flags [DF], proto TCP (6), length 2948)

    host-92-0-0-241.as43234.net.43976 > host-92-0-0-240.as43234.net.targus-getdata1: Flags [.], cksum 0xc557 (incorrect -> 0x9be3), seq 41191950:41194846, ack 1, win 229, options [nop,nop,TS val 15504851 ecr 15459784], length 2896

14:44:05.781876 IP (tos 0x0, ttl 64, id 29536, offset 0, flags [DF], proto TCP (6), length 40)

    host-92-0-0-240.as43234.net.targus-getdata1 > host-92-0-0-241.as43234.net.43976: Flags [R], cksum 0x80af (correct), seq 1314350815, win 0, length 0

### 可以看出接收端和发送端的length都超过了mtu 1500，说明GSO和GRO都生效了

启用GSO/GIO

网卡配置

Host A

选项 状态
tcp-segmentation-offload off
generic-segmentation-offload on
generic-receive-offload on
udp-fragmentation-offload off

Host B

选项 状态
tcp-segmentation-offload on
generic-segmentation-offload on
generic-receive-offload on
udp-fragmentation-offload off

测试步骤

### Host B

# tcpdump -i em1 tcp

# iperf3 -s

### Host A

# tcpdump -i eno1 tcp

# iperf3 -c 92.0.0.240 -l 5000

### 测试部分结果如下

15:32:41.857417 IP host-92-0-0-240.as43234.net.51572 > host-92-0-0-241.as43234.net.targus-getdata1: Flags [.], seq 59386070:59387518, ack 1, win 229, options [nop,nop,TS val 16691752 ecr 16736846], length 1448

15:32:41.857540 IP host-92-0-0-240.as43234.net.51572 > host-92-0-0-241.as43234.net.targus-getdata1: Flags [.], seq 59387518:59388966, ack 1, win 229, options [nop,nop,TS val 16691752 ecr 16736846], length 1448

15:32:41.857542 IP host-92-0-0-241.as43234.net.targus-getdata1 > host-92-0-0-240.as43234.net.51572: Flags [.], ack 59388966, win 1786, options [nop,nop,TS val 16736849 ecr 16691752], length 0

### 但是iperf显示的cwnd（拥塞窗口）比全部关闭是要大，但是小于全部开启

### Host B

# tcpdump -i em1 udp

# iperf3 -s

### Host A

# tcpdump -i eno1 udp

# iperf3 -c 92.0.0.240 -u -l 5000

最新文章

  1. 练习：使用nmcli 配置网络连接
  2. 【MVC】ASP.NET MVC Forms验证机制
  3. Discuz X2任务开发
  4. checkbox的三种状态处理
  5. Alpha阶段个人总结
  6. android source
  7. CF 579A Raising Bacteria
  8. ASP.net AJAX Toolkit —— DynamicPopulateExtender
  9. Laravel学习基础篇之--路由
  10. JS 循环遍历JSON数据 分类： JS技术 JS JQuery 2010-12-01 13:56 43646人阅读 评论(5) 收藏 举报 jsonc JSON数据如：{&amp;quot;options&amp;quot;:&amp;quot;[{
  11. JSP 基本语法
  12. Docker使用docker-compose.yml构建Asp.Net Core和Mysql镜像并与Mysql数据库通信
  13. 前端框架Vue.js——vue-i18n ，vue项目中如何实现国际化
  14. 【BZOJ2034】最大收益（贪心）
  15. AndroidStudio、gradle、buildToolsVersion关系
  16. SVProgressHUD在viewDidLoad里无法显示的bug
  17. HTTP协议和WEB框架
  18. 2.在Jenkins中配置及执行 maven + selenium + testng项目
  19. 1.2.4注意Sysyem.out.println与i--
  20. MySQL进程-状态等参数详解

热门文章

  1. css多余字符显示省略号
  2. 关于引用WebLogic.jar时遇到NoClassDefFoundError问题的解决方法
  3. linux下tar.xz结尾文件的解压方法
  4. 剑指Offer：对称的二叉树【28】
  5. MVC+Ext.net零基础学习记录（二）
  6. RQNOJ 169 最小乘车费用：水dp
  7. 分享知识-快乐自己：Hibernate中的 quert.list() 与 quert.iterate() 方法区别
  8. 深度学习在gilt应用——用图像相似性搜索引擎来商品推荐和服务属性分类
  9. 《java编程思想》：异常丢失
  10. Python 2.7获取网站源代码的几种方式_20160924