[Bloat] Steam In Home Streaming on ath9k wifi

[Hal Murray]

> 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. 

It should be reasonable to synchronize the clocks at both ends well enough.

If that doesn't work and/or is inconvient, you could post process one trace 
to adjust the time stamps.  The idea is to scan both traces in parallel to 
find the minimum transit times in each direction, then adjust the time stamps 
on one end to allocate half the total time to each direction.  It would 
obviously be handy to have a few pings during a period of low traffic for 
calibration.

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There are two dimensions to clocks.  One is the current time.  The other is 
the frequency.  If the frequency is off, the clock will drift.  (ntpd's drift 
correction is usually stored in someplace like /var/lib/ntp/ntp.drift)

Unless you are interested in long runs, the clock will not drift far enough 
to be a serious problem, so all you have to do is get the time right before 
starting a run.

You might want to kill ntpd on the wifi end so it doesn't get confused and yank the clock around.


-- 
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