John,
I created Mantis 338. I made the assumption that its CA because that's where
the symptoms are, but as this is tracked down we may find that it needs
re-assignment elsewhere. For example, device support's not delivering IO
interrupt processing events.
When this happens, does the time stamp in the record update?
Run also netstat on the IOCs host and look for a Send-Q which chronically
have bytes backed up. This indicates IP delivery issues upstream of the ca
server.
Also, make certain that a runaway thread isn't using all of the CPU and
starving out the CA server.
Also, if the above two diagnostics are ok, then send a stack trace for the
offending event thread in the ca server and I will have a look. Use the
"casr" diagnostic at higher interest levels to find out which thread it is
(thread <=> client IP address correlation).
Jeff
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> On Behalf Of John Sinclair
> Sent: Tuesday, April 28, 2009 8:27 AM
> To: Tech-talk
> Subject: linux ioc problem
>
> I have been having a problem with EPICS IOCs (3.14.9) on linux (fedora
> 2, fedora 8, rhel 4). Every once in awhile ( perhaps one to six months
> ), the IOC stops delivering events. Both caput and caget work in the
> sense that caget retrieves the new value set by caput, but no events are
> delivered.
>
> The IOC never prints any error messages and epicsThreadShowAll indicates
> all OK.
>
> Does anyone else see this behavior?
>
> John Sinclair
- References:
- linux ioc problem John Sinclair
- Navigate by Date:
- Prev:
Re: linux ioc problem John Sinclair
- Next:
RE: dbCaPutLinkCallback crash in 3.14.10 on cygwin; PROBLEM SOLVED Mark Rivers
- 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
2018
2019
2020
2021
2022
2023
2024
- Navigate by Thread:
- Prev:
Re: linux ioc problem John Sinclair
- Next:
OMS VME58 End of Life Ron Sluiter
- 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
2018
2019
2020
2021
2022
2023
2024
|