[Cerowrt-devel] [Bloat] Ubiquiti Launches a Speed Test Network

Toke Høiland-Jørgensen toke at toke.dk
Fri Sep 6 13:59:21 EDT 2019

Sebastian Moeller <moeller0 at gmx.de> writes:

> Hi Toke,
>> On Sep 6, 2019, at 10:27, Toke Høiland-Jørgensen <toke at toke.dk> wrote:
>> Mikael Abrahamsson <swmike at swm.pp.se> writes:
>>> On Wed, 4 Sep 2019, Matt Taggart wrote:
>>>> So an interesting idea but they have some things they could improve.
>>> I've been considering what one should run in parallel with the speed test 
>>> to get an impression if the speedtest impacts performance of other flows / 
>>> realtime flows, similar to what dslreports speedtest does.
>>> I've considered running one or several simulated voip calls (50pps) and 
>>> record RTT, PDV, packet loss etc for this session.
>>> It would be interesting to hear any suggestions people have for a fairly 
>>> simple codebase that does this that can be included in these kinds of test 
>>> clients (both server and client end, and of course one that protects 
>>> against reflection attacks etc).
>>> iperf3 can be used for this, but from what I can see the iperf3 server 
>>> code isn't very friendly to multiple parallel tests or even resilient 
>>> against hung clients that doesn't close the test nicely.
>>> I also considered using WebRTC or VoIP libraries, does anyone know what 
>>> RTT/PDV/packet loss data can be extracted from some common ones?
>> Pete coded up this wonderful tool for UDP-based latency testing; it's
>> even supported in Flent, and available on some (all?) the public-facing
>> servers:
>> https://github.com/heistp/irtt
> This reminds of a tangentially related question, do we/could we
> actually write the requested DSCP into the packet payloads so we could
> see/display dscp bleaching/remapping packets experience during
> transit? For irtt, ping and even netperf TCP/UDP flows?

irtt could definitely do this; not sure if it does. Ping and Netperf,
probably not...


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