Experimental Physics and
Industrial Control System

Dirk Zimoch <[email protected]> · Fri, 24 Nov 2017 08:50:23 +0100

On 20.11.2017 11:10, Dirk Zimoch wrote:

Hello everyone,

From time to time we see a strange problem with the timestamp on our
vxWorks 5.5 IOCs. The timestamp jumps to the future (e.g. 2071). I have
seen it happen on EPICS 3.14.12 as well as 3.14.8. Not all but more than
one IOC seem to be affected from such an incident. Not all jump to the
same future time.

Has anyone else seen this effect?
Can a corrupted NTP message cause this?

Dirk

Example:
ZPSAF15-VME > NTPTime_Report 1
NTP driver is synchronized with server
Syncronization interval = 60.0 seconds
Last synchronized at 2017-11-24 08:45:29.149741
OS tick rate = 100 Hz (nominal)
Measured tick rate = 100.024 Hz
NTP Server = 129.129.190.1
value = 0 = 0x0
ZPSAF15-VME > date
2073/05/20 11:20:31.396217
value = 27 = 0x1b

Time jumped this night, only on this IOC.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System