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Subject: RE: [PATCH v6 0/2] Add l2reflect measurement application
Date: Wed, 21 Sep 2022 11:43:13 +0200
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From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
To: "Felix Moessbauer" <felix.moessbauer@siemens.com>, <dev@dpdk.org>,
 <henning.schild@siemens.com>
Cc: <jan.kiszka@siemens.com>, <thomas@monjalon.net>,
 "Maxime Coquelin" <maxime.coquelin@redhat.com>,
 "Marcelo Tosatti" <mtosatti@redhat.com>
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> From: Felix Moessbauer [mailto:felix.moessbauer@siemens.com]
> Sent: Friday, 2 September 2022 10.46
>=20
> Dear DPDK community,
>=20
> this patch provides the l2reflect measurement tool
> which will be discussed in our 2022 DPDK Userspace Summit talk:
> "Using DPDK OVS for deterministic low latency communication"
>=20
> While the code still might need some polish, we believe it is
> a good starting point for discussions about low latency networking
> in DPDK.
>=20
> The tool can also be used in a CI environment to contineously
> measure latencies across the evolution of DPDK and Linux.
>=20
> Best regards,
> Felix Moessbauer
> Siemens AG

Dear Felix and Henning,

Great to meet you at the 2022 DPDK Userspace conference.

Have you considered using the Configuration Testing Protocol (CTP), =
described in chapter 8 of the Ethernet specification from 1984 [1], =
instead of your own packet format and the Local Experimental Ethertype?

[1]: http://decnet.ipv7.net/docs/dundas/aa-k759b-tk.pdf

The CTP an obsolete protocol, and not part of the IEEE standards for =
Ethernet, but I think Wireshark is able to parse such packets.

There might also be long term perspectives in building on top of a =
published (although obsolete) standard - e.g. the protocol could be =
revived and become part of the DPDK protocol library, along with LACP.

On the other hand, it might limit your ability to expand the protocol.


Med venlig hilsen / Kind regards,
-Morten Br=F8rup