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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | general purpose callback tasks : callbackRequest() |
| From: | John Dobbins <[email protected]> |
| To: | EPICS Tech-Talk <[email protected]> |
| Date: | Wed, 08 Jun 2011 09:01:31 -0400 |
Greetings,I have an IOC on which all records stopped updating for 5 seconds at a time followed by resumption of normal operation. The IOC would operate normally for hours at a time and then would suffer a burst of stop/go activity lasting several minutes.
The IOC has multiple thread implementing asynchronous device support and uses the general purpose IOC callback tasks. I think the problem is that callbackRequest(), which can fail silently, was overflowing the callback queue.
My problem appears to be fixed by increasing the callback queue size.My question: Is there a way to know about the callback queue status or otherwise avoid this situation?
John Dobbins Cornell Laboratory for Accelerator-based Sciences and Education Cornell University Ithaca, NY