Experimental Physics and
Industrial Control System

Chip Watson <[email protected]> · Wed, 19 Feb 1997 08:48:01 -0500

Nick,

>Thus I seem to have a problem relating to R3.13, and one of the symptoms
>is likely to be caused by Channel Access messages not being delivered for
>substantial perods of time.

Are you getting "dropped events" messages on that IOC's console?  If
so, the messages are being lost, most likely due to insufficient CPU
resources.  Channel access is starved first (reference: the "warm"
discussion of last month on priorities), and events are then discarded.

However, to loose 20 Hz signals for several seconds would require a rather
severe CPU load (infinite loop).

Get an operator to go to that console and run "spy" and look for the
offending task before pushing the reset button.

Chip

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System