[time-nuts] Re: NTP Accuracy

[Hal Murray]

> But its supposed to be accurate to 500 ps and I want to verify that.

500ps is one cycle at 2GHz.  A cache miss is much longer.  Any timing 
involving software is unlikely to be that accurate.

Gigabit ethernet (1000BASE-T) runs at 125MHz - 8ns.  So even if you have 
hardware level timing, you will need sub-cycle accuracy if you are going to 
get near 500ps.

You might get more info if you tell us the make/model of your board.  Somebody 
might have one and have run some tests.  If you have a URL for the data sheet, 
that would help.


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