> > So when this happens I execute "ifdown eth0 && ifup eth0" and restart > chrony. The refclock is now working again
i'm using i211 with ublox neo 8T and it works well. is there any chance that something is downing the interface? The PHC will not work if the interface is not up. It may be worth checking to be sure the interface is still up (ip link or ifconfig) next time the problem occurs. -ch On Fri, Mar 25, 2022 at 4:37 AM Fabian <fabian.schoe...@gmail.com> wrote: > I have the following setup: > > Intel I210 with SDP0 as PPS input from a Ublox M8Q-MAX device. > The Ublox device is set to 1 Hz with 50% pulse width. > chrony 4.2, Debian 11 with Kernel 5.15, i5-8500T > > I have configured the refclock: > > refclock PHC /dev/ptp0:extpps:nocrossts:pin=0 width 0.5 poll 0 precision > 1e-9 pps refid GPS prefer trust > > I have attached the whole chrony config down below. > > After some time (which seems to be random, 1 - 24 hours) the PHC no > longer produces a PPS interrupt (my guess), leading chrony to no longer > chosing the PHC refclock. LastRx goes up, no longer recovering. > The Ublox module still outputs a 1 Hz pulse as measured by a logic > analyzer (also the LED still blinks). > > So when this happens I execute "ifdown eth0 && ifup eth0" and restart > chrony. The refclock is now working again, until the next failure. > Nothing shows up in dmesg regarding this event. > > What could be the issue here? I am not sure if this mailing list is the > correct one, as this might also be a kernel issue, or hopefully not a > hardware issue with the Intel NIC. > I have tried some things: different powersupply for the GPS device > aswell as the PC. Different CPU settings (powersafe, performance). > Different Kernels: 5.10, 5.16. > > I disconnected the serial output from the GPS. Tried with only PPS and > GND connected, as I thought maybe the serial port was somehow > interfering. Disabled EEE, which probably had no effect anyway as the > switch does not support EEE. > > I also tried disconnecting PPS output and reconnecting it again to see > if the pulse would be picked up again, it did. > > > I'll try to get a chrony debug log when this happens. > > Not sure what else I can try. Any hints? > > best regards > Fabian > > Some additional info: > > Time stamping parameters for eth0: > Capabilities: > hardware-transmit > software-transmit > hardware-receive > software-receive > software-system-clock > hardware-raw-clock > PTP Hardware Clock: 0 > Hardware Transmit Timestamp Modes: > off > on > Hardware Receive Filter Modes: > none > all > > 01:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network > Connection (rev 03) > > Settings for eth0: > Supported ports: [ TP ] > Supported link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > Supported pause frame use: Symmetric > Supports auto-negotiation: Yes > Supported FEC modes: Not reported > Advertised link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > Advertised pause frame use: Symmetric > Advertised auto-negotiation: Yes > Advertised FEC modes: Not reported > Speed: 1000Mb/s > Duplex: Full > Auto-negotiation: on > Port: Twisted Pair > PHYAD: 1 > Transceiver: internal > MDI-X: off (auto) > Supports Wake-on: pumbg > Wake-on: g > Current message level: 0x00000007 (7) > drv probe link > Link detected: yes > > phc_ctl[356709.285]: > capabilities: > 62499999 maximum frequency adjustment (ppb) > 0 programable alarms > 2 external time stamp channels > 2 programmable periodic signals > 4 configurable input/output pins > has pulse per second support > doesn't have cross timestamping support > > > chrony.conf: > > confdir /etc/chrony/conf.d > sourcedir /etc/chrony/sources.d > keyfile /etc/chrony/chrony.keys > driftfile /var/lib/chrony/chrony.drift > ntsdumpdir /var/lib/chrony > logdir /var/log/chrony > maxupdateskew 100.0 > rtcsync > makestep 1 3 > leapsectz right/UTC > hwtimestamp eth0 > allow 192.168/16 > log refclocks > peer 192.168.0.5 minpoll 2 maxpoll 6 iburst xleave key 1 extfield F323 > peer 192.168.0.84 minpoll 2 maxpoll 6 iburst xleave key 1 extfield F323 > refclock PHC /dev/ptp0:extpps:nocrossts:pin=0 width 0.5 poll 0 precision > 1e-9 pps refid GPS prefer trust > > -- > To unsubscribe email chrony-users-requ...@chrony.tuxfamily.org > with "unsubscribe" in the subject. > For help email chrony-users-requ...@chrony.tuxfamily.org > with "help" in the subject. > Trouble? Email listmas...@chrony.tuxfamily.org. > >
