DPDK¶

DPDK compilation steps

Download the dpdk git repositories from http://www.dpdk.org/browse.

Extract the downloaded dpdk files and download the required packages:

apt-get install libnuma-dev liblua5.3-dev libpcap-dev [for ubuntu]

Create the DPDK build tree:

Follow the steps mentioned at Compilation Steps to do DPDK compilation.

Post successful compilation, allocate hugepage and bind the PCI device to run testpmd:

a. Mount hugepages

mkdir /mnt/huge
mount -t hugetlbfs nodev /mnt/huge

b. Load VFIO or UIO Refer to the following link to install the Linux drivers for DPDK: https://doc.dpdk.org/guides/linux_gsg/linux_drivers.html.

Added below the example commands with igb_uio driver. For the igb_uio driver, the path for dpdk-kmod can be found at [http://git.dpdk.org/dpdk-kmods](http://git.dpdk.org/dpdk-kmods). After downloading, go to the following path and compile:

insmod /<dpdk-kmod>/src/igb_uio.ko

c. Ensure that the VF interface is down and unbound from sfc before binding it to the Linux driver:

ifconfig <U25eth0_VF> down
. /usertools/dpdk-devbind.py -u <pci_id> [inside dpdk directory]

f. Run the following command:

. /usertools/dpdk-devbind.py -b igb_uio <pci_id> [inside dpdk directory]

For example:

./usertools/dpdk-devbind.py -b igb_uio af:00.0

Command to run testpmd:

Refer to https://doc.dpdk.org/guides/testpmd_app_ug/run_app.html for more information about the testpmd runtime command. The following is an example command to run testpmd:

Note: Make sure the dpdk-testpmd for specific PCI devices is running on the same NUMA node.

Use the following command to get the numa node for a specific PCI device.
```
cat /sys/bus/pci/devices/0000\:<pci device id>/numa_node
```
The cores for the specific numa node could be found using the following command:
```
lscpu | grep NUMA
```
For example, lscpu | grep NUMA.
```
NUMA node(s): 2
NUMA node0 CPU(s): 0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30
NUMA node1 CPU(s): 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31
```