Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Mon, 16 Mar 2009 13:22:23 -0400

On 3/16/09 12:03 PM, Oleg Makarov wrote:
> A small SNL test program strangely misbehaves when it being run on Soft
> IOC on LINUX.
> Under VxWorks this SNL test program program behaves as expected.

snip

> Any ideas on how to correct this problem with SNL test program running
> on Soft IOC under LINUX OS?

Hi, Oleg.

That's strange.  I tried it in a soft IOC on Mac OS X and it worked fine.

Environment:
* Processor: 2.16 GHz Intel Core Duo
* OS: Mac OS X 10.5.6
* EPICS 3.14.10 (+patches)
* SEQ 2.0.12
* GCC: 4.0.1
* GCC optimization level: -03

What version of EPICS, SEQ, and GCC are you using?

Does the Linux computer have more than one processor/core?  What
compiler optimization level are you using?  Just in case there is some
kind of compiler optimization problem where it is incorrectly reordering
instructions, what happens if you recompile your SNL program and soft
IOC with compiler optimizations turned off (i.e. -O0)?

Lewis

-- 
J. Lewis Muir
Software Engineer
IMCA-CAT/CARS

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System