Re: [dpdk-dev] [RFC PATCH 0/1] Add l2reflect measurement application

["Moessbauer, Felix" <felix.moessbauer@siemens.com>]

> 03/07/2020 17:18, Felix Moessbauer:
> > Dear Maintainers,
> >
> > this patch adds a measurement application to benchmark the latency of
> > transmitting l2 packets via DPDK.
> 
> Are you using a real time system to reduce latency?

Yes, we use a Debian buster with preempt-rt patched kernel.
Additionally, we use isolcpus for the RT relevant threads.
Apart from achieving low latency, we use this tool to measure the maximum latency over a long period of time.
This gives a good estimate that the system behaves deterministically, even under high load.
The tool also has a built-in mechanism to set trace points when a threshold is hit, to later inspect the kernel logs.

> 
> > We add this application to the examples folder, as similar tools were
> > placed there as well.
> 
> No, the examples are not supposed to be tools.
> They demonstrate some APIs.
> 
> If it is a tool to measure performance, and can be used in a CI, I think it is better
> hosted in the directory apps/.
> 
Ok, got it. There were some issues reported by checkpatch. I'll fix them and move to apps.
Thanks for the hint!