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Tool/software:
Hi.
I am working to upgrade our project from version 6 to 9 of the linux rt sdk.
Using the new file systems running on target (bb x15) I get new and interesting behavior.
Every 600 seconds or so, time jumps backwards?
root@am57xx-evm:~# [ 1296.309570] systemd-journald[112]: Time jumped backwards, rotating. [ 1897.645996] systemd-journald[112]: Time jumped backwards, rotating. [ 2499.001068] systemd-journald[112]: Time jumped backwards, rotating. [ 3100.349639] systemd-journald[112]: Time jumped backwards, rotating. [ 3701.700286] systemd-journald[112]: Time jumped backwards, rotating. [ 4303.054473] systemd-journald[112]: Time jumped backwards, rotating. root@am57xx-evm:~# timedatectl Local time: Thu 2024-10-31 14:18:32 UTC Universal time: Thu 2024-10-31 14:18:32 UTC RTC time: Thu 2024-10-31 14:18:33 Time zone: UTC (UTC, +0000) System clock synchronized: yes NTP service: active RTC in local TZ: no root@am57xx-evm:~# timedatectl timesync-status Server: 104.131.155.175 (0.pool.ntp.org) Poll interval: 1min 4s (min: 32s; max 34min 8s) Leap: normal Version: 4 Stratum: 2 Reference: 408E7A25 Precision: 0 (-30) Root distance: 6.141ms (max: 5s) Offset: -5.470ms Delay: 59.254ms Jitter: 216.963ms Packet count: 36 Frequency: -500.000ppm
I am not sure if this is an issue or not and I did not find anything about it on the forum, so I'm asking.
Thanks,
Nathan
Hello Nathan,
This is a systemd service that was added to the meta-tisdk layer in order to synchronize system clock from hardware clock.
See the following commit: https://git.ti.com/cgit/ti-sdk-linux/meta-tisdk/commit/?h=am57x-9.x&id=ae87f156b750fbfb520f318ca290d0be0491fab6
best,
Josue