[Make-wifi-fast] pressure for better clocks

[Bob McMahon <bob.mcmahon@broadcom.com>]

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Hi All,

Iperf 2.0.14 provides end/end latency measurements but requires sync'ed
clocks. The lack of attention to end/end latency is a major deficit to the
networking industry and impairs user experience. Ping isn't the real deal
either.

I find one of the many problems with the tech industry is that cheap mass
market stuff proliferates.  An example of this is the oscillators used for
time keeping which run things like CPUs.  There are many ways to get better
time without spending too much. The GPS atomic clocks are basically
available for free over most of the planet. Cellular clocks, synced to GPS,
are available indoors.

Here is a good article:

https://www.pcworld.com/article/2891892/why-computers-still-struggle-to-tell-the-time.html



*But computer makers often use inexpensive crystals costing only a few
cents each, which can compromise accuracy. “If you buy server-class
hardware, you will get cheap crystal, and time will wander if you don’t do
something about it,” Neville-Neil said.The average crystal ends up being
about as accurate as a mechanical watch*

Bob McMahon

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