Re: [dpdk-dev] KNI alternatives

[Stephen Hemminger <stephen@networkplumber.org>]

Last time I tried.
Virtio user was as fast as KNI and consumed less cpu. Was seeing 10mpps
Tap was much slower. Like 1mpps.

Vpp uses virtio user.

Sorry for top post. Only have phone internet

On Wed, Jan 13, 2021, 9:06 AM Thomas Monjalon <thomas@monjalon.net> wrote:

> Hi,
>
> As discussed today in the techboard meeting, KNI has probably
> better alternatives today without using an out-of-tree module.
> Virtio-user is a good candidate to replace KNI.
> What is the performance of TAP?
> Is there a way to leverage af_packet, af_xdp, or even pcap interfaces?
>
> In order to avoid using the KNI out-of-tree module,
> we should make the librte_kni compatible with an other interface.
> The big plan is then to move the KNI module out of the main DPDK repo,
> as we did for igb_uio.
>
> The first step of this plan might be to document pros & cons
> of the KNI alternatives inside the KNI documentation:
>         https://doc.dpdk.org/guides/prog_guide/kernel_nic_interface.html
>
> As a start, this doc should be better referenced:
>
> https://doc.dpdk.org/guides/howto/virtio_user_as_exceptional_path.html
>
> Note: I won't do this update myself, so feel free to step up!
> Thanks
>
>
>