Hi Hal,
On 31/01/2017 15:54, Hal Murray wrote:
30 Jan 19:46:40 ntpd[3773]: frequency error 2712 PPM exceeds tolerance 500 PPM
clock : 1416.666661MHz
If the clock really is 1.42 GHz but the system thinks it is 1.416...
My calculations say it's off by 2400 ppm
That's the sort of glitch I've been looking for.
The next question is where does 1416 come from?
I think that's Open Firmware, but I don't know my way around there (yet?).
That's some excellent detective work - my guess is the 1.42GHz number
Apple publicise is marketing rather than actual (ie they've rounded up
to make the machine seem faster) but it's a good datapoint and maybe
there is a correlation. Interesting.
When I get some time later today/tonight I'll summarise what we have so
far into a single email and send that off to the linux-ppc crew for
comment, will copy you and list of course.
What's odd to me (though perhaps I misunderstand the finer points still)
- is this presumably means that in the absence of ntp, Mac Mini G4s
would, at least running this kernel, routinely have their system clocks
running wrong (fast, I guess?)
Bear with me, will get a summary together once I finish a couple of work
items.
Cheers,
Hugh
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