Since my plug mount / by NFS on a server which has ntpd when I build software I get warning about files in the future, etc... I didn't install ntpd on the plug so I run ntpdate by hand from time to time.
However I noticed something funny:
gcc55 ~ # ntpdate pool.ntp.org
23 Apr 11:01:48 ntpdate: step time server 18.104.22.168 offset 28.554061 sec
gcc55 ~ # uptime
11:01:54 up 14 days, 16:56, 2 users, load average: 0.04, 0.32, 0.41
The drift is 2 seconds per day.
Boot, run ntpdate, wait a few days and do ntpdate again, could someone report too?