> -----Original Message----- > From: Jord Pool [mailto:jord.p...@outlook.com] > Sent: Friday, June 15, 2018 2:59 AM > To: Richard Cochran <richardcoch...@gmail.com> > Cc: Cliff Spradlin via Linuxptp-users <linuxptp-users@lists.sourceforge.net> > Subject: Re: [Linuxptp-users] Synchronisation > > Hi, an update here, > > So I found that when launching ptp4l it automatically assigns itself a > /dev/ptp* > device. One time it assigns /dev/ptp2, another time it assigns /dev/ptp4 etc > very > random. I have a total of 5 devices: /dev/ptp0, /dev/ptp1, /dev/ptp2, > /dev/ptp3 > and /dev/ptp4. Phc2sys is launched at the same time by using # phc2sys -c > /dev/ptp0 -s CLOCK_REALTIME -m -q -w. >
Are you passing only one ethernet device to ptp4l? Or changing? It seems very suspicious if it keeps changing /dev/ptpX devices for a given interface. This smells of a potential driver issue. > When letting ptp4l choose a device by just running # ptp4l -i enp0s25 -m -q > -4 -H > and letting phc2sys synchronise the /dev/ptp0 device to the system clock by > using # phc2sys -c /dev/ptp0 -s CLOCK_REALTIME -m -q -w, ptp4l does return the > message that it assumed the grandmaster role and phc2sys starts synchronising > /dev/ptp0 to the system clock (I also checked this with phc_ctl and this seems > perfectly fine). > > When specifying any other device in the phc2sys command (such as /dev/ptp4 or > /dev/ptp2 etc.) it does never reach servo 2 and always keeps returning the > message “Clock check: clock jumped forward or running faster than expected!” > Well, enp0s25 *seems* to indicate that it's using /dev/ptp4, according to your ethtool -T output. > This seems to me that /dev/ptp0 is the only device that is correctly able to > synchronize to the system clock, however I can never get ptp4l to distribute > the > time of /dev/ptp0 over the network.. > Well, /dev/ptp0 isn't connected to the network interface you are using ptp4l for. It is quite possible you have a driver issue going on here. Try Richard's suggestion of automated mode, and see what happens? Thanks, Jake ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
