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

Subject: Re: epics IOC and gun screen and copy/scrollback mode
From: Ralph Lange <Ralph.Lange@bessy.de>
To: "Allison, Stephanie" <saa@slac.stanford.edu>, John Dobbins <john.dobbins@cornell.edu>
Cc: EPICS Tech-Talk <tech-talk@aps.anl.gov>
Date: Fri, 18 Apr 2008 13:02:08 -0500
I'm right now working on final improvements of Dave Thompson's procServ application (replacing GNU screen with a thin, stable environment for running soft IOCs). I will be releasing this version within the next days. You can have a look at last week's core-talk messages to get a rough impression of what it will be doing.

Ralph (at the Codeathon)


Allison, Stephanie wrote:
Hi John,

There was a Nov 2007 thread on a similar topic:
http://www.aps.anl.gov/epics/tech-talk/2007/msg01376.php

We still use screen here and we still have the problem (I think sys$output is blocked while scrolling?) and I haven't found a workaround. I'd be interested if anyone knows of a solution.

At some point, we will look at Ralph Lange's setup:
http://epics.aps.anl.gov/epics/wiki/index.php/How_to_Set_Up_Console_Access_and_Logging_for_VME_and_Soft_IOCs

Stephanie Allison

-----Original Message-----
From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of John Dobbins
Sent: Friday, April 18, 2008 10:22 AM
To: EPICS Tech-Talk
Subject: epics IOC and gun screen and copy/scrollback mode


Dear All,

When running an EPICS IOC inside GNU Screen we have noticed that if one enters the copy/scrollback mode an odd thing happens. The IOC continues to serve channels access requests but the data acquisition itself appears to be suspended. When someone accidentally leaves a screen session in the copy/scrollback mode we see that the PVs in that IOC are effectively frozen. If you then go to the screen session and exit copy/scrollback mode normal behavior resumes.

Have others seen this behavior? If so is there a known fix?

Regards,

John Dobbins
Cornell University
Lab for Elementary Particle Physics

References:
epics IOC and gun screen and copy/scrollback mode John Dobbins
RE: epics IOC and gun screen and copy/scrollback mode Allison, Stephanie

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