Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 24 Mar 2004 16:20:45 -0600

Mark Rivers wrote:

At least 2 IOCs at Brookhaven, on the same subnet, just got lots of the
following errors:
iocx17b2> ../online_notify.c: CA beacon (send to "130.199.193.255:5065")
error was "S_errno_ENOBUFS"

So this looks OK?  Is there something else I should check?  Clearly
something is going on on the network there that is causing these
problems.

There are two different kinds of network buffers in vxWorks that can run
out. In Tornado 2.x mbufShow() is a synonym for netStackDataPoolShow()
which shows the buffers used by the IP stack for data packets. There is
another command netStackSysPoolShow() which is shows the state of the
system buffer pool - these buffers are used for the ARP cache, routing
tables and other system storage associated with the network.
However in the above case you might find there's nothing wrong with these
buffers either. I'm not quite sure what causes ENOBUFS errors when
sending CA beacons; I have seen similar errors on IOCs here that have
never run out of DataPool or SysPool buffers, and I don't yet know what
they're complaining about (any ideas Jeff?). They do appear to be benign
though, if my memory is correct - the loss of a beacon can cause some
unnecessary CA searches to occur, but nothing should break.
- Andrew
--
Dear God, I didn't think orange went with purple until I saw
the sunset you made last night.  That was really cool. - Caro

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System