Re: [Linuxptp-users] Master offset jumps

[Richard C. <ric...@gm...>]

On Mon, Dec 14, 2020 at 12:28:14PM +0100, Nils Hasler wrote:
> on the master I get these log messages:
> 
> Dec 12 04:05:44 nuc5 phc2sys[5688]: [69845.383] sys offset  -7786079 s2 freq -23999999 delay   9216
> Dec 12 04:05:45 nuc5 phc2sys[5688]: [69846.408] sys offset  -7786030 s2 freq -23999999 delay   9216
> Dec 12 04:05:46 nuc5 phc2sys[5688]: [69847.423] clockcheck: clock jumped forward or running faster than expected!
> Dec 12 04:05:46 nuc5 phc2sys[5688]: [69847.424] sys offset 1125899899056265 s0 freq -23999999 delay   9088

What MAC and kernel version is on the Nuc?

This sounds like that rare, bad gettime on one of the Intel chips.
Newer kernels have a retry in the driver as a workaround.

Thanks,
Richard