Installing Napatech DPDK

Before you begin

The Napatech driver and Napatech SmartNICs must be installed and started before Napatech DPDK PMD can be used.

About this task

This procedure describes commands to download, install Napatech DPDK and configure huge pages.

Procedure

Set the environment variable NAPATECH3_PATH to indicate where the Napatech driver is installed before compiling Napatech DPDK.
```
export NAPATECH3_PATH=/opt/napatech3
```
Note: /opt/napatech3 is the default installation directory. If the driver is installed elsewhere, the correct installation directory must be used.
Download the package or clone. In this example, the v21.05.0 release is used. You can find the latest release information at https://github.com/napatech/dpdk/releases.
```
wget https://github.com/napatech/dpdk/archive/dpdk-21.05.0_2.10.tar.gz
tar xvf v21.05.0_2.10.tar.gz
cd dpdk-21.05.0_2.10/
```
Or
```
git clone https://github.com/napatech/dpdk.git
```
Build libraries, drivers and test applications.
```
meson build
cd build
ninja
```
Enable and reserve memory for huge pages to run DPDK applications.
The following is an example to enable memory for huge pages while the kernel is running. The setting will not remain after a system reboot.
```
echo 32 > /proc/sys/vm/nr_hugepages
mkdir /mnt/huge
mount -t hugetlbfs nodev /mnt/huge
```
Memory can be reserved in a specific NUMA node. The following command example is to allocate 1 GB huge page memory on NUMA node 0.
```
echo 32 > \
/sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages
```
Run the following command to check memory for huge pages.
```
cat /proc/meminfo | grep Huge
```
An output example:
```
AnonHugePages:    251904 kB
HugePages_Total:      32
HugePages_Free:       32
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:    1048576 kB
```
Add the kernel parameters to the file /etc/default/grub as shown in the following example to enable memory for huge pages at boot time.
```
GRUB_CMDLINE_LINUX_DEFAULT="default_hugepagesz=1G hugepagesz=1G hugepages=32"
```
Run the following command after editing the file.
```
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
```
Use the following command if you are using UEFI based boot,
```
sudo grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg
```
Edit the file /etc/fstab and add the following entry to avoid remounting after a system restart.
```
nodev /mnt/huge hugetlbfs defaults 0 0
```
And reboot.
```
reboot
```