DPDK--pdump测试实例

一、安装准备

1. 加载环境变量

dpdk安装目录

export RTE_SDK=/home/sword/dpdk-17.08
export RTE_TARGET=x86_64-native-linuxapp-gcc

2. 安装libelf-dev

sudo apt  install libelf-dev

以前安装过，也重新更新安装否则会出错

/usr/src/linux-headers-4.15.0-46-generic/Makefile:975: "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel"

3. 修改配置文件

在DPDK安装目录下，CONFIG文件夹中的common_base下修改，将n改为y，之后重新编译DPDK

CONFIG_RTE_LIBRTE_PMD_PCAP=y
CONFIG_RTE_LIBRTE_PDUMP=y

4. 安装pdump

cd dpdk-17.08/app/pdump
make
make install

二、运行pdump

1. 运行testpmd

pdump需要依附testpmd之类的主进程才可以运行
首先运行DPDK脚本，实现网卡绑定、设置大页内存等

./dpdk-17.08/usertools/dpdk-setup.sh

运行testpmd

/dpdk-17.08/app/test-pmd/build/app
./testpmd -c 0x03 -n 4 -- -i --port-topology=chained

2. 运行pdump

此处的rx-dev即文件保存目录和保存文件名
这里有个大坑！！！！
就是不能在build/app/目录下运行，会一直卡在初始化PMD驱动阶段

dpdk-17.08/app/pdump
./build/app/dpdk-pdump -- --pdump 'port=0,queue=*,rx-dev=/tmp/capture1609.pcap'

运行结果：

root@sword:/home/sword/dpdk-17.08/app/pdump# ./build/app/dpdk-pdump -- --pdump 'port=0,queue=*,rx-dev=/tmp/capture1609.pcap'
EAL: Detected 2 lcore(s)
EAL: Probing VFIO support...
EAL: WARNING: Address Space Layout Randomization (ASLR) is enabled in the kernel.
EAL:    This may cause issues with mapping memory into secondary processes
EAL: PCI device 0000:06:00.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:10d3 net_e1000_em
EAL: PCI device 0000:0b:00.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:10d3 net_e1000_em
PMD: Initializing pmd_pcap for net_pcap_rx_0
PMD: Creating pcap-backed ethdev on numa socket 4294967295
Port 1 MAC: 00 00 00 01 02 03
^C

Signal 2 received, preparing to exit...
##### PDUMP DEBUG STATS #####
 -packets dequeued:			10
 -packets transmitted to vdev:		10
 -packets freed:			0

此处收到的10个数据包是在另外的主机A上使用pktgen，设定发送数据包数量为10，发过来的。

3. 使用wireshark打开pcap文件

//wireshark安装
sudo apt install wireshark
//查看现有用户组
cat /etc/group |grep wireshark
//将当前用户添加进wireshark用户组
usermod -a -G wireshark $USER
//打开
wireshark

结果显示为：