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<== Date ==> <== Thread ==>
Subject: Re: FLNK doesn't process
From: Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>
To: EPICS Tech Talk <tech-talk at aps.anl.gov>
Date: Tue, 18 Jan 2022 16:14:32 +0100
On Tue, 18 Jan 2022 at 12:06, William Kirstaedter via Tech-talk <tech-talk at aps.anl.gov> wrote:

[...]

we dont know whats wrong now...
(original code was without ".PROC CA" and with PREC "12")


Please note:
Targeting local FLNKs to .PROC and making them CA is only required in a few cases:
  • If the target record is scanned periodically.
  • If you need to override the loop protection in EPICS Base.
  • If you want to avoid putting too many records in the same lock set.
The regular cases (passive target record, "normal" use case, one-to-one FLNKing) can and should use database records.

Using database records is immediate, fast, directly coupled. Basically a call to the target record's process() routine.
Using CA to the .PROC field adds queueing, delay, thread switching. Think of it as a loosely coupled triggering of the target record "in the very near future".

Cheers,
~Ralph

Replies:
RE: [EXTERNAL] Re: FLNK doesn't process Pearson, Matthew via Tech-talk
References:
FLNK doesn't process Randall Cayford via Tech-talk
Re: FLNK doesn't process Hu, Yong via Tech-talk
Re: FLNK doesn't process Randall Cayford via Tech-talk
Re: FLNK doesn't process William Kirstaedter via Tech-talk
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