Pktgen
===

###### tags: `Telecom` `QCT` `DPDK` `5G`

## HW Information
### NIC
| Interface | MAC | PCI Addr |VLAN |
| -------- | -------- | -------- | -------- |
| enp28s0f0 | 3c:fd:fe:a9:e5:00 | 0000:1c:00.0 | 480 |
| enp28s0f1 | 3c:fd:fe:a9:e5:01 | 0000:1c:00.1 | 480 |
### NUMA

$ cat /sys/class/net/enp61s0f0/device/numa_node
0
$ lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              88
On-line CPU(s) list: 0-87
Thread(s) per core:  2
Core(s) per socket:  22
Socket(s):           2
NUMA node(s):        2
Vendor ID:           GenuineIntel
CPU family:          6
Model:               85
Model name:          Intel(R) Xeon(R) Gold 6152 CPU @ 2.10GHz
Stepping:            4
CPU MHz:             1000.816
BogoMIPS:            4200.00
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            1024K
L3 cache:            30976K
NUMA node0 CPU(s):   0-21,44-65
NUMA node1 CPU(s):   22-43,66-87

## Prerequisite
* Install Lua

$ wget https://www.lua.org/ftp/lua-5.3.5.tar.gz
$ tar zxvf lua-5.3.5.tar.gz 
$ make linux
$ make test
$ make install

* [DPDK Setup Script](https://doc.dpdk.org/guides/linux_gsg/index.htm)
- [ ] Insert IGB-UIO module
- [ ] Setup hugepage mappings for NUMA systems
- [ ] Bind Ethernet device to IGB UIO module
:::info
setup hugepage 寫入 ```/sys/devices/system/node/node0或1/hugepages/hugepages-2048kB/nr_hugepages```，但重新開機後會失效。
:::

## Installation
* [Getting Started with Pktgen](https://pktgen-dpdk.readthedocs.io/en/latest/getting_started.html)
:::info
* sysctl - 用作檢視及修改執行中的Kernel參數，然而重新開機後便會失效，而只要將寫入/etc/sysctl.conf則可在開機時自動載入Kernel參數。
* /etc/fstab - [開機時會主動讀取/etc/fstab，並配置掛載磁碟](http://icodding.blogspot.com/2015/09/linux-etcfstab.html?m=1)。
* ```ls /dev/hugepages | wc -l``` = HugePages_Total - HugePages_Free
:::

## Commands

Pktgen:/> start all
Pktgen:/> set 0 rate 10
Pktgen:/> set 0 count 1000000
Pktgen:/> page pcap
Pktgen:/> page main