[ovs-dev] [PATCH] Docs: Add DPDK AF_XDP PMD use case.

William Tu u9012063 at gmail.com
Thu Aug 22 14:43:49 UTC 2019


On Thu, Aug 22, 2019 at 1:33 AM David Marchand
<david.marchand at redhat.com> wrote:
>
> On Thu, Aug 22, 2019 at 10:30 AM Stokes, Ian <ian.stokes at intel.com> wrote:
> >
> >
> > On 8/22/2019 7:00 AM, David Marchand wrote:
> > > On Thu, Aug 22, 2019 at 12:49 AM William Tu <u9012063 at gmail.com> wrote:
> > >> Add command lines for using DPDK's AF_XDP PMD driver.
> > >>
> > >> Signed-off-by: William Tu <u9012063 at gmail.com>
> > >> ---
> > >>   Documentation/intro/install/afxdp.rst | 36 +++++++++++++++++++++++++++++++++++
> > >>   1 file changed, 36 insertions(+)
> > >>
> > >> diff --git a/Documentation/intro/install/afxdp.rst b/Documentation/intro/install/afxdp.rst
> > >> index 820e9d993d8f..c3e03b40f3b5 100644
> > >> --- a/Documentation/intro/install/afxdp.rst
> > >> +++ b/Documentation/intro/install/afxdp.rst
> > >> @@ -426,6 +426,42 @@ In the namespace, run drop or bounce back the packet::
> > >>     ip netns exec at_ns0 ./xdp_rxq_info --dev p0 --action XDP_TX
> > >>
> > >>
> > >> +Using DPDK's AF_XDP PMD driver
> > >> +------------------------------
> > >> +Another way to use AF_XDP is to enable DPDK and use DPDK's AF_XDP
> > >> +driver. First, enable the AF_XDP PMD config at DPDK's
> > >> +config/common_base file by::
> > >> +
> > >> +  CONFIG_RTE_LIBRTE_PMD_AF_XDP=y
> > >> +
> > >> +and recompile the DPDK source. Then, compile OVS with DPDK::
> > > The AF_XDP pmd went in dpdk 19.05.
> > >
> > > OVS master uses dpdk 18.11.2.
> > > - https://github.com/openvswitch/ovs/commit/446a2a7ede1f377687e8c0d848d63eb5e9988cfa
> > > is required to build against 19.05,
> > > - https://github.com/openvswitch/ovs/commit/75e5e39e5468cb9f15114f7d8b367d39bc26756c
> > > is required to build against 19.08,
> > >
> > > If you want to have a note in this doc in the master branch, you must
> > > properly explain this, or users will be disappointed and complain on
> > > the ml :-)
> >
> >
> > +1, also I think we shouldn't reference commits in the docs that
> > reference the dpdk-latest branch (I was burned by this before in commit
> > messages myself), the reason is I intend to rebase dpdk-latest on master
> > after the 2.12 release and as such the commit  IDs will change due to
> > the rebase.
> >
> > I'm not so sure we should even add documentation to master regarding the
> > AF_XDP PMD until master moves to 19.11? Possibly the 'dpdk-latest' might
> > be a better candidate for this doc change?
>
> Yes, this was my thought too.
>

Hi David, Ian, and Eelco,

Thanks for your comments.
Do you suggest me to resubmit the patch to dpdk-latest now?
Or do you mean wait until master moves to dpdk 19.11, and then
submit to master?

Regards,
William


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