On 10/7/14, 2:26 PM, Poul-Henning Kamp wrote:
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In message <20141007200046.02aa9406...@ip-64-139-1-69.sjc.megapath.net>, Hal Mu
rray writes:
Timing on Ethernet is as good as RS-232 if you have a point to point link
rather than a huge network full of crappy software.
That is a "truth" with an almost uncountable number of footnotes...
If we're only talking about timing in 99% of the cases, then yes, but
that last one percent will make you tear your hair out.
We did 20 microsecond jitter on 10GE for the ESO ELT adaptive optics
prototype, and that was seriously pushing things near the edge.
Five microseconds is trivially possible with a good $20 RS232 cable.
Yes indeed..
And in my case, I have (or can make) a sync line, so I'd only trust
USB/Ethernet to "load the number" and want to have a hardware "execute now"
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