From: Avi Cohen <acohen@ves.io>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: users@dpdk.org
Subject: Re: [dpdk-users] eBPF in DPDK
Date: Mon, 8 Apr 2019 21:37:21 +0300 [thread overview]
Message-ID: <CAJGSrbO4fcpc=68xmURP7dByXB6b_o_95-T_wY9pSrq1VMncjw@mail.gmail.com> (raw)
In-Reply-To: <20190408113138.23c5d334@shemminger-XPS-13-9360>
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@networkplumber.org>:
> On Mon, 8 Apr 2019 21:16:53 +0300
> Avi Cohen <acohen@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@networkplumber.org>:
> >
> > > On Mon, 8 Apr 2019 17:25:55 +0300
> > > Avi Cohen <acohen@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.
>
prev parent reply other threads:[~2019-04-08 18:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-08 14:25 Avi Cohen
2019-04-08 15:09 ` Stephen Hemminger
2019-04-08 18:16 ` Avi Cohen
2019-04-08 18:31 ` Stephen Hemminger
2019-04-08 18:37 ` Avi Cohen [this message]
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