Re: [Linuxptp-users] sanity_freq_limit

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

On Fri, Jun 19, 2015 at 07:43:01PM +0000, Daniel Le wrote:
> 
> PHC is not used in my system. I have a proprietary NIC FPGA-based
> MAC driver which has its own hardware clock, and in this scheme,
> synchronizes to the Linux system clock that in turn is synchronized
> to PTP Grandmaster via software timestamping mechanism. The
> timestamps of PTP packets are provided by the FPGA MAC driver may
> cause problem. It seems that the system clock fails to be stepped.

Okay, so you have a special custom setup.  I cannot really guess what
is wrong, but it does appear that whatever clock you are using is
failing to jump, or that the change in time is not reflected in the
subsequent time stamps.

Thanks,
Richard