[Make-wifi-fast] Weird periodic latency

[Toke Høiland-Jørgensen]

Michael Yartys via Make-wifi-fast <make-wifi-fast at lists.bufferbloat.net>
writes:

> Hi
>
> I decided to run a couple of flent 8-stream TCP downloads from
> netperf-eu.bufferbloat.net to my Fedora 33 laptop, and I noticed some
> weird periodic latency in the resulting graphs. My router is the
> NETGEAR R7800 running OpenWrt with an ath10k radio. Here's a graph
> that's representative of the results that I got:
> https://imgur.com/a/BOKNzht
>
> This looks similar to the latency spikes you would get from channel
> scans, but I have specified the BSSID in the Gnome network settings,
> which means that background scanning should be disabled. In addition,
> the test ran for 30 minutes, and channel scans are much more frequent
> than the latency spikes seen in the graph above. Here's what channel
> scans look like in a 15 minute long test: https://imgur.com/a/YJepfcp
>
> Does anyone here know what could be causing this behaviour?

Hmm, your email reminds me that the server you are testing against was
having some issue before the holidays. So it may just be that it's
crapping out and it has nothing to do with your connection.

You could try adding a secondary ping flow (--test-parameter
ping_hosts=one.one.one.one should do it) and see if that secondary flow
also shows the same spikes. If it does, it's likely your connection, if
not it's likely the server...

-Toke