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<== Date ==> <== Thread ==>

Subject: Prioritizing Channel Access per Record?
From: Brian Bevins <[email protected]>
To: EPICS Techtalk <[email protected]>
Date: Tue, 18 Mar 2014 11:47:04 -0400
Is there any way to specify that CA delivery of updates from certain records should be prioritized over other records on the same ioc?

I've got an application where a bunch of ai's are processed at 10Hz and some relatively big (for us) waveforms are processed at about 0.3-0.5 Hz. The ioc is not heavily loaded and all record processing seems to happen in a timely way, but from the client end (EDM) the "fast" records all pause for ~0.5 sec whenever the waveforms push out their CA updates.

The ai's are already being processed at a higher priority, but this doesn't seem to help their updates get pushed out with higher priority.

Is there some tinkering I can do with the priorities of the CA threads to get what I want? How can I tell which thread will get which record updates? Is there something more obvious I'm missing?

Thanks,
--Brian

--
Brian S. Bevins, PE
Computer Scientist / Mechanical Engineer
Thomas Jefferson National Accelerator Facility

     "The urge to save humanity is almost always only a false-face
      for the urge to rule it."
                                     -- H. L. Mencken


Replies:
Re: Prioritizing Channel Access per Record? Ralph Lange
RE: Prioritizing Channel Access per Record? Mark Rivers

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