On Tue, Jul 18, 2017 at 04:09:57PM +0200, Petr Kulhavy wrote:
> 1. GM using HW time stamping
Okay, so make sure the master has the correct UTC offset.
[global]
utc_offset 37
or
ptp4l --utc_offset=37
> The HW-timestamping slave is also running:
> /usr/sbin/phc2sys -s /dev/ptp0 -c CLOCK_REALTIME -S 1.0 -O 0
With '-O 0' you have set the UTC/TAI offset to zero by hand. That
explains the offset between your two slaves. Instead, use this:
phc2sys -a -r
> Log of the SW-timestamping slave is:
> ptp4l: [413741.946] running in a temporal vortex
> The log of the HW-timestamping device is:
> ptp4l: [252.634] running in a temporal vortex
These messages about "temporal vortex" mean that the GM is reporting a
UTC offset that is less than the hard coded default. Probably you are
running an older ptp4l version on the GM than on the slaves. I
recommend running the same version on all the nodes.
Thanks,
Richard
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