Experimental Physics and
Industrial Control System

Chip Watson <[email protected]> · Tue, 14 Mar 2000 14:39:41 -0500

Dave,

It is not difficult to make connections to and retrieve initial values from EPICS
at a rate of several hundred per second.  Once connections are made, thousands
of value changes per second can be handled, although a graphics program can
not, of course, paint that many.  If initial connection time is important (to launch
a complex screen), you may want to adjust the priority of the IOC task which
handles name resolution.  Jefferson Lab runs in this mode so that moderately
loaded IOC's respond quickly enough to new channel connections from MEDM.
Suggested additions to your boot script for this feature:

    taskPrioritySet(taskNameToId("CA TCP"),181)
    taskPrioritySet(taskNameToId("CA UDP"),182)

Chip

--
Chip Watson
High Performance Computing Group
Thomas Jefferson National Accelerator Facility
Tel: (757) 269-7101
http://www.jlab.org/~watson

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System