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dpdk-configuration.md

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DPDK Configuration

The following steps are required to properly configure the devices to deploy the UPF in DPDK mode. Let's assume that interfaces ens801f0 and ens801f1 are the ones to be used for this purpose.

  • Get their MAC addresses
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
...
3: ens801f0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether b4:96:91:b1:ff:f0 brd ff:ff:ff:ff:ff:ff
4: ens801f1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether b4:96:91:b1:ff:f1 brd ff:ff:ff:ff:ff:ff
...
  • Download a copy of dpdk-devbind script

The dpdk-devbind script from DPDK is used for this purpose. To get a copy of it, execute the following command from the UPF's root directory:

$ wget https://raw.githubusercontent.com/DPDK/dpdk/main/usertools/dpdk-devbind.py -O dpdk-devbind.py
$ chmod +x dpdk-devbind.py
  • Get the PCI addresses of interest
$ ./dpdk-devbind.py -s
Network devices using kernel driver
===================================
0000:17:00.0 'Ethernet Controller X710 for 10GBASE-T 15ff' if=ens260f0 drv=i40e unused=vfio-pci *Active*
0000:17:00.1 'Ethernet Controller X710 for 10GBASE-T 15ff' if=ens260f1 drv=i40e unused=vfio-pci
0000:4b:00.0 'Ethernet Controller E810-C for QSFP 1592' if=ens785f0 drv=ice unused=vfio-pci
0000:4b:00.1 'Ethernet Controller E810-C for QSFP 1592' if=ens785f1 drv=ice unused=vfio-pci
0000:b1:00.0 'Ethernet Controller E810-C for QSFP 1592' if=ens801f0 drv=ice unused=vfio-pci
0000:b1:00.1 'Ethernet Controller E810-C for QSFP 1592' if=ens801f1 drv=ice unused=vfio-pci

No 'Baseband' devices detected
==============================

...
  • Bind devices to DPDK-compatible driver
$ sudo ./dpdk-devbind.py -b vfio-pci 0000:b1:00.0
$ sudo ./dpdk-devbind.py -b vfio-pci 0000:b1:00.1
  • Verify that the binding was successful
$ ./dpdk-devbind.py -s

Network devices using DPDK-compatible driver
============================================
0000:b1:00.0 'Ethernet Controller E810-C for QSFP 1592' drv=vfio-pci unused=ice
0000:b1:00.1 'Ethernet Controller E810-C for QSFP 1592' drv=vfio-pci unused=ice

Network devices using kernel driver
===================================
0000:17:00.0 'Ethernet Controller X710 for 10GBASE-T 15ff' if=ens260f0 drv=i40e unused=vfio-pci *Active*
0000:17:00.1 'Ethernet Controller X710 for 10GBASE-T 15ff' if=ens260f1 drv=i40e unused=vfio-pci
0000:4b:00.0 'Ethernet Controller E810-C for QSFP 1592' if=ens785f0 drv=ice unused=vfio-pci
0000:4b:00.1 'Ethernet Controller E810-C for QSFP 1592' if=ens785f1 drv=ice unused=vfio-pci

No 'Baseband' devices detected
==============================

...
  • Now, check the group that these two interfaces got assigned
$ ls /dev/vfio/
184  185  vfio