Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  <20132014  2015  2016  2017  2018  2019  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  <20132014  2015  2016  2017  2018  2019 
<== Date ==> <== Thread ==>

Subject: RE: asyn+streamDevice hangs with synchronousLock:Yes
From: Mark Rivers <rivers@cars.uchicago.edu>
To: Brian McAllister <mcallister@mit.edu>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Tue, 2 Jul 2013 18:27:16 +0000
When it is hung please do

epicsMutexShowAll 1

I think you have probably run into a deadlock, which can happen when multiple mutexes are taken/released in the wrong order.

If you simplfy your problem to a single record does the problem go away? 

I am not an expert on using I/O Intr scanned records with StreamDevice, particularly multiple records on the same port.  Dirk may be able to help with this.

Mark


________________________________________
From: brian@hotrats.mit.edu [brian@hotrats.mit.edu] on behalf of Brian McAllister [mcallister@mit.edu]
Sent: Tuesday, July 02, 2013 1:23 PM
To: Mark Rivers
Cc: tech-talk@aps.anl.gov
Subject: Re: asyn+streamDevice hangs with synchronousLock:Yes

What does it mean if synchronousLock is permanently "Yes" ?

I see it's a mutex and that it's used in many places.  Is there any way to
find out where it is being locked/not unlocked ?

- brian

Replies:
Re: asyn+streamDevice hangs with synchronousLock:Yes Dirk Zimoch
References:
RE: asyn+streamDevice hangs with synchronousLock:Yes Mark Rivers
Re: asyn+streamDevice hangs with synchronousLock:Yes Brian McAllister

Navigate by Date:
Prev: Re: asyn+streamDevice hangs with synchronousLock:Yes Brian McAllister
Next: caLab Pierrick Hanlet
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  <20132014  2015  2016  2017  2018  2019 
Navigate by Thread:
Prev: Re: asyn+streamDevice hangs with synchronousLock:Yes Brian McAllister
Next: Re: asyn+streamDevice hangs with synchronousLock:Yes Dirk Zimoch
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  <20132014  2015  2016  2017  2018  2019 
ANJ, 20 Apr 2015 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·