Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Mon, 13 Jun 2016 10:30:24 -0500

Hi Stefen,

On 06/13/2016 01:13 AM, Stefen Paul wrote:
> *Message-1:*
> 
> ld 0,0, "app1.munch"
> 
> BSP routine sysAtReboot() not found, epicsExit() will not be called by
> reboot.  For reduced functionality, call
> rebootHookAdd(epicsExitCallAtExits)

This is a message from the EPICS code warning you that if you want the
IOC to be able to close its network sockets nicely in response to a
Ctrl+X reboot, you need to make a minor change to your VxWorks source
code. The change is optional, the IOC will work fine without it, but
with it any CA clients will be notified about the IOC rebooting sooner,
and some older network-attached devices using Asyn might not recover
from the IOC rebooting without themselves needing a reboot unless you
add it.

The description of this change at
http://www.aps.anl.gov/epics/tech-talk/2005/msg00004.php was written for
older VxWorks versions; for recent VxWorks 6.x versions I copy the
attached apsRebootHook.c file to
  $(WIND_HOME)/vxworks-$(VXWORKS_VERSION)/target/config/comps/src
and then add the following components to my build:

Folder FOLDER_EPICS {
    NAME	EPICS Components and Configuration
    SYNOPSIS	Additional components for APS use. \
    _CHILDREN	FOLDER_ROOT
}

Component INCLUDE_EPICS_REBOOTHOOK {
    NAME	Early RebootHook capture
    SYNOPSIS	Run sysRebootHook before the network shuts down.
    CONFIGLETTES apsRebootHook.c
    INIT_RTN	rebootHookAdd(sysRebootHook);
    _INIT_ORDER	usrRoot
    INIT_AFTER	usrKernelExtraInit
    INIT_BEFORE	usrNetworkInit
    _CHILDREN	FOLDER_EPICS
    _DEFAULTS	FOLDER_EPICS
}

Copy the above component definitions into a new file
 $(WIND_HOME)/vxworks-$(VXWORKS_VERSION)/target/config/comps/vxWorks/50folder_epics.cdf
then close and reopen your VxWorks Image Project inside Workbench and
you should be able to see and add the above components to your the
Kernel Configuration.

> *Message-2:*
> 
> iocInit
> Starting iocInit
> ############################################################################
> ## EPICS R3.14.12.4 $Date: Mon 2013-12-16 15:51:45 -0600$
> ## EPICS Base built Oct 16 2014
> ############################################################################
> WARNING: OS Clock time was read before being set.
> Using 1990-01-02 00:00:00.000000 UTC
> iocRun: All initialization complete
> value = 0 = 0x0
> 
> Any clues regarding these messages .... may be we need to set the time
> properly for the second case.

Does the IOC ever get the correct time after that?

As Mark Rivers said unless you have configured it otherwise the EPICS
code will ask the boot host for the time using the NTP protocol, but you
can override that and specify a different host for NTP by setting the
environment variable EPICS_TS_NTP_INET with the IP address of the
correct server.

Recent versions of VxWorks also have a built-in time synchronization
task which you can configure while building the OS. In Base-3.15.4 and
later we don't start our own NTP sync task if the OS task is already
running, in which case the above environment variable will never be
used, so you'll want to make sure you have the OS configuration
variables set properly.

HTH,

- Andrew

-- 
Arguing for surveillance because you have nothing to hide is no
different than making the claim, "I don't care about freedom of
speech because I have nothing to say." -- Edward Snowdon

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System