DPDK CPU settings

On the FortiGate-VM, a DPDK engine is attached to an IPS engine, which shares the same process and is mapped to a CPU. A processing pipeline of four stages handles a packet from RX to TX:

1. DPDK RX
2. vNP
3. IPS
4. DPDK TX

You can freely determine the CPUs enabled for each pipeline stage by running the following commands:

config dpdk cpus

set [X] [Y]

end

Here X is one of the pipeline stages: rx-cpus, vnp-cpus, ips-cpus, and tx-cpus.

Y is a string expression of CPU IDs, which contains comma-delimited individual CPU IDs or ranges of CPU IDs separated by a dash.

The example below enables CPUs 0, 2, 4, 6, 7, 8, 9. 10, and 15 to run the vNP pipeline stage:

set vnp-cpus 0,2,4,6-10,15

You must enable at least one CPU for each pipeline stage. Otherwise, DPDK early initialization fails.