Experimental Physics and
Industrial Control System

John Dobbins <[email protected]> · Thu, 08 Aug 2013 10:32:06 -0400

Greetings,

I am wondering if anyone has experience setting database breakpoints on

large locksets?

I had not used dbb() until recently when someone here tried to use it on

a particular record and it failed. In particular the IOC stopped

communicating via Channel Access, though the console continued to

respond to for example dbl. If I then try the command dbstat the console

stops responding.

Further testing revealed that dbb worked for some records in the IOC but

not for others. In particular large linksets seemed to be a problem. I

tried a second IOC (different device types) and this was true there

also. I can't give a specific linkset size, it seems to work fine for a

few tens of records in a link set. I took a large linkset and trimmed it

until it worked. Adding back one record could reproducibly cause it to

then fail.

Any advice appreciated.

Regards,

John Dobbins

Cornell Laboratory for Accelerator-based Sciences and Education