RE: asyn+streamDevice hangs with synchronousLock:Yes

[Mark Rivers <rivers@cars.uchicago.edu>]

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