Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Mon, 14 Mar 2011 15:29:08 -0600

Hi Murali,

On Monday 14 March 2011 15:41:11 Shankar, Murali wrote:
>
>   We are seeing a couple of issues with caSnooper here at SLAC and I am
> trying to get to the bottom of these.
>
> 1)      Some network issues have been reported when using caSnooper with
> EPICS R3-14-8-2x. Using  R3-14-10 just for caSnooper in a R3-14-8-2x
> environment seems to be a workaround.

I disagree; there were several changes to the CAS code in between those 
releases to fix issues in the CAS.  If you've found that using a newer version 
of Base solves some problems then there are no changes that could be made in 
the caSnooper application code to fix them.  EPICS is *designed* so that 
different versions will inter-operate properly over the network; you shouldn't 
hold back the version of Base that one application like this is built against 
just because other parts of your system are using a different Base release 
(although that does matter when different pieces of code are going to be 
linked together into a single executable such as the support modules in an 
IOC).

> 2)      These seems to be an issue with the -c  (Check validity of top n
> requests) on Linux. We are working around this using a perl script to
> digest caSnooper output and then caget for the validity check.
>
> Is version caSnooper2_1_2_1 (10 Aug 2007) the latest? If this is being
> actively maintained, would there be a later version elsewhere? Are there
> any patches to caSnooper2_1_2_1 we are missing?

There have been no commits to CVS since the 2-1-2-1 release that I can see 
from the cvsweb view at
  http://www.aps.anl.gov/cgi-bin/epics/cvsweb/extensions/src/caSnooper/

Since Ken Evans retired we've not had to make changes to caSnooper here at APS 
— I suspect SLAC is using it more than APS now.  If you guys want to 
contribute patches we'd be happy to include them, but other than build issues 
on newer OSs I don't think we have the effort to actively work on it any more.

HTH,

- Andrew
-- 
An error is only a mistake if you don't learn from it.
When you learn something from it, it becomes a lesson.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System