Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Wed, 08 Aug 2007 17:46:10 +0200

More observations from me:
I can also see the faulty behaviour against a Linux 3.14.9 IOC.
Including the statistical behaviour that Steven was reporting. Some of
the caget calls get the unexpected "no read", others don't. On the same
Linux host, caget fails about 20%. Cross to vxWorks mv2100 IOC, caget
fails 100%. Camonitor works all the time, against all type IOCs.
Rebuilding Base 3.14.9 with the as subdirectory from 3.14.8.2 does not
change the faulty behaviour at all. The as parser cleanup things got away.

More observations from Steven:
I already have optimization turned off for the cross compiler (have been
bit by that on VxWorks before) but have host optimization on. I tried
turning off host optimization and recompiling caget on linux, but the
problem remained.
Now, I just rebuilt all of base on linux with HOST_OPT=NO. Even stranger.

Using optimized build on linux, caget failed with an unexpected read
access error 19 out of 20 times just tested. Using non-optimized build
on linux, caget failed 2 out of 20 times!

Houston, we have a problem.
Ralph

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System