Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <2017 Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <2017
<== Date ==> <== Thread ==>

Subject: Re: time stamp on vxWorks jumping to the future
From: Dirk Zimoch <dirk.zimoch@psi.ch>
To: <tech-talk@aps.anl.gov>
Date: 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.

Replies:
Re: time stamp on vxWorks jumping to the future Michael Davidsaver
References:
time stamp on vxWorks jumping to the future Dirk Zimoch

Navigate by Date:
Prev: Re: areaDetector checkout fails Mark Rivers
Next: Re: time stamp on vxWorks jumping to the future Michael Davidsaver
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <2017
Navigate by Thread:
Prev: time stamp on vxWorks jumping to the future Dirk Zimoch
Next: Re: time stamp on vxWorks jumping to the future Michael Davidsaver
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <2017
ANJ, 24 Nov 2017 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·