being able to plot cleanly from the command line

[dtaht]

from this thread over here:

https://forum.openwrt.org/t/validating-nss-fq-codels-correctness/111123/33

I've longed to plot dynamically the output of a high resolution irtt sample, but the output has two problems in that it uses mixed units (us, ms, s), and the one way delay measurements require a sync'd clock. the rtt measurement does not. (ok, that's three problems).

The json output doesn't use mixed units but requires the test complete before plotting. four problems. A command line option to always use ns would help.

a typical test I do is:

irtt client -i3ms -d1m --dscp=0xfe

and then I parse that with tr, awk and gnuplot. There isn't a way to send the json output (-o whatever.json) to a stream either. I have some really cool plots of how starlink works but haven't twiddled it enough to do one way delay yet (five problems).

[heistp]

OWD will always require a sync'd clock, right?

The during-test output was intended for humans, and the json for programs. The data is collected first in memory then dumped in one big chunk. That would have to be re-worked, but it's possible.