[Make-wifi-fast] Flent traffic direction convention

[Erkki Lintunen]

On 3/26/20 11:22 PM, Tim Higgins wrote:
> Second question: Is there any documentation that can help me figure out 
> exactly what traffic is running in each test type?

Not exactly an answer to the question.

I found following pages very helpful when three years ago I challenged 
myself with Flent to measure WiFi network performance and max it out 
with network devices I had at hand at the time.

(One ap blew up it's two capasitors. Visually and operationally the ap 
was working as normal but measurements showed drastic drop in 
performance. Light odor and inspection of el-capasitor burned tops did 
confirm the hard to believe experience.)

<https://www.bufferbloat.net/projects/bloat/wiki/RRUL_Chart_Explanation/>

The above page provides link to this page.

<https://burntchrome.blogspot.com/2016/12/cake-latest-in-sqm-qos-schedulers.html>

Experience showed up Flent's feature to compare data sets very educating 
and powerfull, not only with the box-plot chart as the pages show. Took 
time to get mentaly bend to read and interpret the Flent charts instead 
of only numbers I was used to with iperf and other tools.

In my quest I did a change, measured it, compared to the previous set 
and reviewed, if the change showed any measurable effect. Finally I 
compared the sets of the very first and the last. I was totally driven 
by measurements on my way myth busting many my beliefs for a performant 
network.

The quest changed my definition for "getting max out of a network". Now 
the max is all quantities in effect at any time: fairness, lowest 
possible latency and highest possible bitrate. Looking at many published 
benchmarks today, I still think, max seams to mean just a maximum 
bitrate and other qualities are _supposed_ to derive from it.

Hope this is for any help.

- Erkki