On Tue, Aug 22, 2017 at 06:11:49PM +1000, David Mirabito wrote:
> Would a patch to only sanity check the offset when in ptpTimescale make
> sense?
Looking into 1588:
8.2.4.2 timePropertiesDS.currentUtcOffset
In PTP systems whose epoch is the PTP epoch, the value of
timePropertiesDS.currentUtcOffset is the offset between TAI and
UTC; otherwise the value has no meaning.
So, yes, when ptpTimescale==ARB the "temporal vortex" warning is not
meaningful, strictly speaking. Still it does help one to realize that
the GM is borken, don't you think?
I mean, already in 2006 the TAI-UTC offset was 33 seconds, and
everybody should know this, especially people who manufacture GM
clocks.
Thanks,
Richard
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