[Bloat] Steam In Home Streaming on ath9k wifi

[Dave Taht]

On Sun, Nov 19, 2017 at 2:03 PM, Caleb Cushing <xenoterracide at gmail.com> wrote:
>>
>> Right, no idea how Windows drivers behave. But odds are that the
>> bottleneck is at the client, since that often has worse antennas than
>> the AP. If you're in a position to take packet captures at both clients
>> and AP you may be able to figure it out; may require tightly
>> synchronised clocks to do properly, though.
>
>
> I could try running wireshark on both, it's a ton of packets, and I'll be
> honest, I don't know that *I* would know what to do with them.
>
>>
>> How do you see the latency spikes? An end-to-end ping? You could try
>> pinging the AP from both clients and see which one sees the latency
>> spike...
>
>
> steam homestreaming has an in game performance monitor, it shows you your
> ping, estimated bandwidth, and how fast it's currently streaming. So when
> the game stutters I also notice a recorded ping/latency increase. Sadly
> though, it doesn't include highly detailed logs to my knowledge.
>
>> Yeah, those are link-layer retransmissions. The ath9k driver sometimes
>> retries individual packets up to 30 times, which is obviously way too
>> much...
>
>
> that's fun...

Ideally we should retry at most, twice, at the lowest rate, and a bit
more as we go up.

> --
> Caleb Cushing
>
> http://xenoterracide.com
>
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-- 

Dave Täht
CEO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-669-226-2619