Experimental Physics and Industrial Control System
Hi Steven,
On 2011-05-23 Steven M. Hartman wrote:
> Dirk Zimoch wrote:
> > Second incident:
> > An other IOC lost CA connectivity. This time the error message was
> > different:
> > CA beacon (send to "...") error was "ENOBUFS"
>
> This one is similar to what SNS has seen over the years with mv2100
> and related boards with the DEC network driver. The precipitating
> event is a temporary loss of the physical network layer (i.e.
> unplugged network cable to IOC, or edge network switch powered
> down). It looks like a buggy network driver that cannot recover from
> this fault when there are lots of UDP packets queuing in the
> outgoing buffers. This one does not seem to be recoverable except by
> a reboot so we have taken steps to reduce the likelihood of loosing
> the physical link. We do not see this with other boards.
I found and fixed a few issues in the dec21x40End.c driver for vxWorks 5.5.x
in 2009. The main one was to make DMA underflow a recoverable event (which
might be relevant to this problem), but I also fixed the packet counting which
wasn't working properly in this driver. I believe I sent Dave Thompson my
fixes at the time, but whether they got into the SNS version or not I don't
know.
On a related question, have you ever heard of an mv2100 BSP for vxWorks 6.x?
I'm currently working on upgrading the mv2700 BSP from 6.4 to 6.8, but I can't
find an mv2100 BSP for any 6.x OS version at the Wind River website.
- Andrew
--
Optimization is the process of taking something that works and
replacing it with something that almost works, but costs less.
-- Roger Needham
- Replies:
- Re: vxWorks network problems Dirk Zimoch
- References:
- vxWorks network problems Dirk Zimoch
- Re: vxWorks network problems Steven M. Hartman
- Navigate by Date:
- Prev:
Re: caGateway crashes / use of *MustSucceed functions Benjamin Franksen
- Next:
Windows XP Cygwin difficulties for building EPICS base Cid, Florencio A
- 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: vxWorks network problems Steven M. Hartman
- Next:
Re: vxWorks network problems Dirk Zimoch
- 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