Thanks Stephen.

Is the Netvsc PMD selected by default or I'll need to specify it somewhere?

Since I'm running a proprietary UDP protocol, 3rd parties (e.g. Azure)
won't know how a flow is established. I'm curious how exactly Azure selects
which NIC to receive a given packet?

Yang

On Wed, Apr 13, 2022 at 8:58 AM Stephen Hemminger <
stephen@networkplumber.org> wrote:

> On Tue, 12 Apr 2022 13:09:51 -0700
> Yang Luan <luan.penny@gmail.com> wrote:
>
> > Hi,
> >
> > We have an application using DPDK on AWS and would like to port it to
> > Azure. What would be recommended PMD to use? If I understand correctly,
> we
> > can either use the Netvsc PMD or the vdev_Netvsc PMD. It seems the Netvsc
> > PMD is newer.
>
> Short answer:
>
> Netvsc PMD is faster and can handle events better.
> vdev_netvsc/failsafe/tap is slower but can emulate some types of rte_flow.
>
> >
> > An alternative is to use the mlx4 PMD by only attaching to the mlx NIC's
> > PCI address. As I understand it, the concern is the mlx nic may not
> receive
> > all the packets. We run a proprietary UDP based protocol on top of DPDK.
> > Are all UDP packets guaranteed to be received by the mlx NIC?
>
> That won't work. the MLX device only sees established flows.
>