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Added decimation filter, documentation and tests

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Andrew Johnson
2019-06-04 12:23:13 -05:00
parent 96259b7bdc
commit deb9dbcd77
7 changed files with 454 additions and 0 deletions
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documentation/RELEASE_NOTES.html
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@@ -16,6 +16,23 @@
<!-- Insert new items immediately below here ... -->
<h3>Added new decimation channel filter</h3>
<p>A new server-side filter has been added to the IOC for reducing the number
and frequency of monitor updates from a channel by a client-specified factor.
The filter's behaviour is quite simplistic, it passes the first monitor event it
sees to the client and then drops the next N-1 events before passing another
event. For example to sample a 60Hz channel at 1Hz, a 10Hz channel every 6
seconds, or a 1Hz channel once every minute:</p>
<pre> Hal$ camonitor 'test:channel.{"dec":{"n":60}}'
...</pre>
<p>More information is included in the
<a href="filters.html">filters</a><!-- href for the EPICS website -->
<a href="../html/filters.html">documentation</a><!-- href for install tree -->
file.</p>
<h3>Cleaning up with Multiple CA contexts in a Process</h3>
<p>Bruno Martins reported a problem with the CA client library at shutdown in a