Experimental Physics and
Industrial Control System

"Shankar, Murali" <[email protected]> · Thu, 13 Oct 2011 11:27:44 -0700

Thank you. I tried this out on my dev box and /proc/cpuinfo happily reports only one CPU. 

The test with CA alone performs better in that it succeeds about 50% of the time. But a little less than 50% of the time, I still get monitors that have not received callbacks. 

The original test with sequence programs performs much better. So far, I have been able to reproduce the issue only once in about 10 tests. But the issue still occurs.

I have attached the thread dumps as well. 

Regards,
Murali

-----Original Message-----
From: J. Lewis Muir [mailto:[email protected]] 
Sent: Thursday, October 13, 2011 7:52 AM
To: Shankar, Murali
Cc: Jeff Hill; [email protected]
Subject: Re: Sequence monitor not getting callback

On 10/12/11 7:15 PM, Shankar, Murali wrote:
> Ernest says he'll help me run this on an single core RTEMS box
> and if possible, a single core VXworks box tomorrow morning.
> I'll post the results here. If I can find a single core linux
> box somewhere, I'll try this out there as well.

Hi, Murali.

I haven't tried it, but I think many SMP Linux kernels support
the 'maxcpus' boot parameter (or the older 'nosmp' boot
parameter).  So perhaps you could use this option to effectively
change your Linux box into a single CPU box for your test?

See

http://www.kernel.org/doc/Documentation/kernel-parameters.txt

and the bootparam(7) man page.

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System