[dpdk-users] KNI multi-queue example?

Andriy Berestovskyy aber at semihalf.com
Mon Apr 4 18:11:56 CEST 2016

Hi Jason,

On Fri, Mar 25, 2016 at 1:00 AM, Jason Kwon <m43kwon at gmail.com> wrote:
> Is there a KNI example for devices and
> drivers which support multiple queues per port?

I guess there is no such an example, please see below.

> Would such an implementation involve instantiating multiple KNI devices,
> each to be associated with a single RX/TX queue pair?  Or would it be
> possible to associate multiple RX/TX queues of a single port to a single
> KNI device?

Since KNI has just 1 RX/TX pair, for the NIC->KNI path you need to
modify kni_ingress() to iterate all the NIC RX queues and send all of
those packets to the KNI.

For the KNI->NIC path you need to modify kni_egress() to distribute
the packets received from the KNI to multiple NIC TX queues (say,
based on a hash).

Having said the above, most likely it will not get you any performance
gain, since I guess the bottleneck is KNI, not the NIC queues.

Andriy Berestovskyy

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