[Make-wifi-fast] Weird periodic latency

[Toke Høiland-Jørgensen]

Michael Yartys <michael.yartys at protonmail.com> writes:

> On Friday, January 15th, 2021 at 19:55, Toke Høiland-Jørgensen <toke at toke.dk> wrote:
>
>> Michael Yartys michael.yartys at protonmail.com writes:
>> 
>
>> > I assume that I got it right by running:
>> > 
>
>> > flent --test-parameter ping_hosts=1.1.1.1 -l 300 netperf-eu.bufferbloat.net tcp_8down
>> > 
>
>> > Either way, I think I'll have to do this test at another time since
>> > 
>
>> > someone is streaming TV downstairs (via Ethernet!) and it really
>> > 
>
>> > pollutes the results: https://imgur.com/a/F33LjeA
>> > 
>
>> > For what it's worth, the ping to 1.1.1.1 looks the same.
>> 
>
>> The extra ping flow is not shown by default on the plot with the regular
>> 
>
>> ping (for that test), so you'll have to use '-p ping_extra' to see it...
>
> Thanks for the tip! I use the GUI so I just selected ping_extra under
> the plot selector to confirm that they looked similar.

Ah, right, I see! OK, in that case it's likely actually something on
your networking causing those spikes... Hmm, if this is WiFi I guess it
could be periodic interference of some kind? A misbehaving device that's
blasting out RF at some interval?

-Toke