I do see that if I have other (non-ptp) traffic on the same network, the offsets move around much more and after a while ptp4l will start experiencing timestamp timeouts. ptp4l cannot recover from these timeouts unless I perform an ifconfig down/up.
-----Original Message----- From: Richard Cochran <richardcoch...@gmail.com> Sent: Thursday, February 11, 2021 10:16 AM To: Zuckerbrod, Daniel <dzuckerb...@textronsystems.com> Cc: Keller, Jacob E <jacob.e.kel...@intel.com>; linuxptp-users@lists.sourceforge.net Subject: Re: [Linuxptp-users] PTP4L Offset Jumps When Querying PMC On Thu, Feb 11, 2021 at 02:56:03PM +0000, Zuckerbrod, Daniel wrote: > These jumps wouldn't occur if ptp4l was preempted from the CPU? No. The estimation of the offset is computed based on time stamps generated in hardware. These input values are not affected by scheduling behavior in any way. (It is true that very large delays between time stamp generation and clock adjustment _can_ affect the control loop stability, but that is not the problem you reported.) Thanks, Richard _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
