Timekeeping oddities on MacMini G4s

[Gary E. Miller]

Yo Hal!

On Sun, 05 Feb 2017 19:47:37 -0800
Hal Murray <hmurray at megapathdsl.net> wrote:

> Stromeko at nexgo.de said:  
> >>     # ntpq -c 'rv 0 frequency'
> >>     frequency=-0.928558    
> > Make that number go into the loopstats file as well?  I don't
> > suppose I should log the output of ntpq to benefit from that extra
> > precision.     
> 
> Is anybody actually running gear where more than 3 fractional digits
> is interesting?  

I'm not saying this happens often, but this is from on one of my
RasPi's:

Local Clock Frequency Offset

Percitiles:
Min	-4.475 ppm
1%	-4.397 ppm
5%	-4.390 ppm
50%	-4.377 ppm
95%	-4.363 ppm
99%	-4.361 ppm
Max	-4.357 ppm

Ranges:
90% 	 0.027 ppm
95%	 0.036 ppm
StdDev	 0.009 ppm
Mean	-4.377 ppm

Notice the Standard Deviation: 9 ppb!

See attached.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin
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