Re: What is cbLow?

[Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>]

On Tue, 3 Aug 2021 at 09:08, Wang, Andrew via Tech-talk <tech-talk at aps.anl.gov> wrote:

What exactly is cbLow? Noticed that it sometimes popped up in the IOC Shell after I specify TPRO in some records I quickly made to experiment with TPRO.

Record process tracing shows the thread that caused a record to process.

cbLow is the name of the EPICS IOC thread that handles callbacks for records that are configured for low priority (i.e., have their PRIO field set to "LOW").

See the chapter on "EPICS General Purpose Tasks" in the AppDevelopers Guide for more details.

In a standard IOC, cbLow does 2nd phase processing of asynchronous records, PINI processing and other things.

Cheers,
~Ralph