[dpdk-users] eBPF in DPDK

[Avi Cohen]

I  know DPDK is in userspace. But i know there is also some talkings about
AF_XDP , in which xdp program is running in kernel and then w zero copy can
be fwd to dpdk app via the PMD AF_XDP

בתאריך יום ב׳, 8 באפר׳ 2019, 21:31, מאת Stephen Hemminger ‏<
stephen at networkplumber.org>:

> On Mon, 8 Apr 2019 21:16:53 +0300
> Avi Cohen <acohen at ves.io> wrote:
>
> > Stephen
> > I did not understand. Is this eBPF dpdk feature can run in the kernel or
> > userspace ?
> > Regards avi
> >
> > בתאריך יום ב׳, 8 באפר׳ 2019, 18:09, מאת Stephen Hemminger ‏<
> > stephen at networkplumber.org>:
> >
> > > On Mon, 8 Apr 2019 17:25:55 +0300
> > > Avi Cohen <acohen at ves.io> wrote:
> > >
> > > > Hi All,
> > > > can someone refer to the flow of a packet that is processed  in eBPF
> > > > program in the kernel . and then forwarded to DPDK-app in user space.
> > > > this was integrated into DPDK 18.05   but not documented. (
> > > > https://doc.dpdk.org/guides-18.05/prog_guide/bpf_lib.html)
> > > > what is the PMD type for this flow ? new socket ? what is the
> penalty ?
> > > > i thought to do some traffic filtering  there.
> > > > pros/cons ?
> > > > Best Regards
> > > > Avi
> > >
> > >
> > > Unlike Linux which has a predetermined set of steps in processing
> packets.
> > > DPDK is a raw toolkit where the processing is composed totally by the
> > > network application.
> > >
> > > Therefore DPDK has a raw eBPF library, it is up to the application to
> > > install it where
> > > it wants in the packet processing. One example is done via rx and tx
> > > callbacks
> > > as shown in the rte_bpf_ethdev.h.
> > >
>
> DPDK is all in userspace. The eBPF library is just another facility
> like LPM lookup, hash library and ACL.
>