On Sun, Feb 07, 2021 at 06:44:24AM +0000, Sean Ma wrote: > We are using a PTP GM connecting to Intel I350 as our PHC, running Centos OS. > > In the ptp4l, the master offset is always stable. > In the phc2sys sometimes we get spike up to 10000 once or more per minute, > command used: phc2sys -s <I350 NIC port> -w -m -n 44 > > Do we know the typical reason for this behavior?
Check if the "delay" value also jumps up. - If so, then phc2sys is being preempted during a measurement. You can mitigate this by using chrt. - If not, the problem may be in the device driver or hardware. Thanks, Richard _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
