Hi Jacob, Here are the additional details you requested:
*ethtool -i eno1 OUTPUT:* driver: igb version: 5.6.0-k firmware-version: 3.25, 0x800005cc expansion-rom-version: bus-info: 0000:06:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: yes KERNEL Details: 3.10.0-1127.el7.x86_64 #1 SMP Tue Mar 31 23:36:51 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux *OS and Version:* CentOS Linux release 7.8.2003 (Core) Regards, Ankur On Thu, Jan 7, 2021 at 3:48 PM Jacob Keller <jacob.e.kel...@intel.com> wrote: > > > On 1/7/2021 2:58 PM, Ankur Sharma wrote: > > Hi, > > > > We are using PTP4L to synchronize the physical hardware clock on our > > intel interface from the external PTP master. Also we are using PHC2SYS > > to synchronize system clock using the Physical hardware clock on intel > > interface. However, we see that the phc2sys process shows an > > explosion of offset and frequency values periodically. > > > > There is no additional/other NTP process running on this system. Below > > are the way we are running PTP4L and PHC2SYS processes: > > > > ptp4l -i eno1 -m -s > > phc2sys -s eno1 -O -37 -S 5 > > > > Attaching the logs for PTP4L and PHC2SYS process for a sample duration > > where we observed explosion in PHC2SYS offset and frequency values. > > > > Any suggestions or pointers on what could be causing this? > > > > What device and driver are you using? > > $ ethtool -i eno1 > > Also what kernel version are you using? > > This sounds suspiciously like some bugs I've worked on in the past that > involved issues with how the frequency adjustments were done. If you're > using an e1000e-based device there are also several known bugs that have > workarounds applied, but if your kernel is too old they might not > contain these fixes. > > I would start here to make sure it's not something that has already been > fixed first. > > > Regards, > > Andy > > > > > _______________________________________________ > Linuxptp-users mailing list > Linuxptp-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linuxptp-users > -- ankurandy
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