On Tue, Jan 12, 2021 at 08:06:01PM +0200, Vladimir Oltean wrote:
>
> I'm looking for a way to block a shell script until phc2sys and ptp4l
> have reached within a certain offset from the grandmaster (say +/- 50 ns).
> Let's say I can write a program based on pmc which monitors the
> master_offset from TIME_STATUS_NP, but what about phc2sys?
We don't have any kind of management interface or IPC to phc2sys, but
you might try this from your shell script.
$ phc_ctl -q eth6 cmp
phc_ctl[326755.414]: offset from CLOCK_REALTIME is 111513ns
The script can evaluate that last word.
Thanks,
Richard
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