Argonne National Laboratory

Experimental Physics and
Industrial Control System

2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020 Index 2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020
<== Date ==> <== Thread ==>

Subject: [Bug 1858826] [NEW] subArray record: prevent posting unneeded updates on CA
From: Martin Konrad via Core-talk <core-talk@aps.anl.gov>
To: core-talk@aps.anl.gov
Date: Wed, 08 Jan 2020 16:56:39 -0000
Public bug reported:

By default waveform records always post updates. The rationale behind
that is that the EPICS developers didn't want to keep another copy of
the array around for comparing (waveforms can be huge). However, in case
of the waveform record the IOC can also keep a 32-bit hash of the array
data around to determine if the data changed. This behaviour can be
controlled by the APST and MPST field. Let's add this feature to the
subArray record as well.

** Affects: epics-base
     Importance: Undecided
     Assignee: Martin Konrad (info-martin-konrad)
         Status: New


** Tags: codeathon

** Changed in: epics-base
     Assignee: (unassigned) => Martin Konrad (info-martin-konrad)

-- 
You received this bug notification because you are a member of EPICS
Core Developers, which is subscribed to EPICS Base.
Matching subscriptions: epics-core-list-subscription
https://bugs.launchpad.net/bugs/1858826

Title:
  subArray record: prevent posting unneeded updates on CA

Status in EPICS Base:
  New

Bug description:
  By default waveform records always post updates. The rationale behind
  that is that the EPICS developers didn't want to keep another copy of
  the array around for comparing (waveforms can be huge). However, in
  case of the waveform record the IOC can also keep a 32-bit hash of the
  array data around to determine if the data changed. This behaviour can
  be controlled by the APST and MPST field. Let's add this feature to
  the subArray record as well.

To manage notifications about this bug go to:
https://bugs.launchpad.net/epics-base/+bug/1858826/+subscriptions

Navigate by Date:
Prev: Re: EPICS 7, pvAccess & static build Torsten Bögershausen via Core-talk
Next: [Bug 1858829] [NEW] caget returns wrong data when used with subArray record Martin Konrad via Core-talk
Index: 2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020
Navigate by Thread:
Prev: Re: EPICS 7, pvAccess & static build Torsten Bögershausen via Core-talk
Next: [Bug 1858829] [NEW] caget returns wrong data when used with subArray record Martin Konrad via Core-talk
Index: 2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020
ANJ, 08 Jan 2020 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·