Experimental Physics and
Industrial Control System

Michael Davidsaver <[email protected]> · Wed, 8 Aug 2018 16:07:02 -0700

On 08/08/2018 03:16 AM, Ricardo Cardenes wrote:
>     When things are (apparently) working, what does epicsThreadShowAll() show?
> 
> 
> I can't really tell. At that point I can't interact with the iocsh console without making the system crash (see point #3), and CA is lost.

In this case, you could put epicsThreadShowAll() at the end of your startup script.

On 08/08/2018 03:16 AM, Ricardo Cardenes wrote:
>     I can't explain this.  The "main" thread should be running with high priority (91).
>     It could hang if an iocsh function blocks locking a mutex held by a hung thread.
>     But simply pressing "return" shouldn't do this.
> 
> 
> I can't either, the high priority of the "_main_" thread flies in the face of the "something is hogging the CPU for everything low-priority". iocsh would need to stall itself in the same way for everything else to die, and I'm not sure what could cause this. I've had a look at the code that reads commands from the prompt and it's relatively straightforward.

I'm not sure if it is relevant, but which readline variant are you using?

> $ grep COMMANDLINE_LIBRARY configure/os/CONFIG_SITE.Common.RTEMS
> COMMANDLINE_LIBRARY = EPICS

It occurs to me that, while at NSLS2, I encountered a bad interaction between libtecla and RTEMS 4.10
which sounds similar.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System