Experimental Physics and
Industrial Control System

Christian Pauly <[email protected]> · Tue, 12 Jan 2016 13:45:40 +0100

Hi

I am setting up a measuerement setup consisting of three individual

devices, which i would like to control with EPICS, running the IOC on a

Raspberry Pi. Communication with each of the devices is done using

altogether three USB-Serial converter, and based on StreamDevice.

I already have working IOCs for each individual device.

Now:
If i would like to run the full setup simultaneously:

Is it better to run the three IOCs individual on the Raspberry, one for

each device ? And relying on Linux for the Multitasking ?

Or is it preferable to run only a single IOC, and load the three

database .dbd files into the same IOC, Initializing all three Serial

ports in the same st.cmd startup file ???

The Raspberry2 has a quadcore CPU, so I could imagine, that running

three individual IOCs might give better performance, since three cores

are used ? But isn't there a problem to run more than one IOC in parallel ?

Any advice welcome !

Best regards.
Christian