Re: [Linuxptp-users] linuxptp result doesn't match 1PPS measurement

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

On Thu, Sep 08, 2022 at 07:41:53PM +0800, Hamilton Alex wrote:

> however,  the 1pps time error is around 40 NS, which means my board is
> ahead of the reference for about 40NS, which doesn't match the result
> dumped by ptp4l.
> 
> anyone has met similar issue before?  how to debug such issue?

This is likely due to path asymmetry.

HTH,
Richard