Re: [Linuxptp-users] ptp4l results in stable master offset, but phc2sys usually see some spike in o
PTP IEEE 1588 stack for Linux
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From: Richard C. <ric...@gm...> - 2021-02-07 15:15:34
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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 |