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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | How to share asyn's queue thread among ports? |
| From: | Klemen Vodopivec via Tech-talk <[email protected]> |
| To: | "[email protected]" <[email protected]> |
| Date: | Thu, 30 May 2019 10:55:42 -0400 |
Hi,in a fast data-acquisiting application that also controls hundreds of neutron detectors we are using asynPortDriver interface for detector configuration and status communication which results in many asynPortDriver params. The communication is fast (less than 1ms for request/response round trip) but is probably still considered blocking. Especially because there's approx 500 params per port, many are written/read in groups and if every request blocks for 1ms it could block CA thread significantly. Our workaround so far was done in database but is overly complex. The obvious solution is to use asyn's blocking mode, but there's up to 500 ports resulting in as many threads.
Ideally there would be an asynPortDriver interface to manage queue threading, which we could then overload and do custom thread management. Is there any other approach to keep number of threads low while providing blocking mode? Would asyn patch that allows asynPortDriver do queue thread management be of broader interest?
-- Klemen