RE: [PATCH v6 0/2] Add l2reflect measurement application

["Morten Brørup" <mb@smartsharesystems.com>]

> From: Felix Moessbauer [mailto:felix.moessbauer@siemens.com]
> Sent: Friday, 2 September 2022 10.46
> 
> Dear DPDK community,
> 
> 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"
> 
> While the code still might need some polish, we believe it is
> a good starting point for discussions about low latency networking
> in DPDK.
> 
> The tool can also be used in a CI environment to contineously
> measure latencies across the evolution of DPDK and Linux.
> 
> 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 Brørup