Experimental Physics and
Industrial Control System

Sean Leavey via Tech-talk <tech-talk at aps.anl.gov> · Wed, 7 Sep 2022 11:05:41 +0100

Hi Mark,

Thanks, that worked (mostly - see below)!

For anyone else interested, here is everything I did to create an app

with iocStats support after compiling EPICS Base 7 and iocStats as a

support module (hope I didn't miss anything):

$ mkdir /path/to/new/ioc
$ makeBaseApp.pl -t ioc myioc
$ makeBaseApp.pl -t ioc -i myioc
$ cd configure
$ nano RELEASE  # define paths to EPICS_BASE and IOCSTATS
$ cd ..

$ nano myiocApp/src/Makefile # add `myioc_DBD += devIocStats.dbd` and

`myioc_LIBS += devIocStats`

$ make
$ cd iocBoot/iocmyapp

$ nano st.cmd # add

`dbLoadRecords("/path/to/iocStats/db/iocAdminSoft.db", "IOC=MYIOC")`

$ ../../bin/linux-x86_64/myioc st.cmd  # runs softIOC

One thing that didn't work for me were the variables $(DEVIOCSTATS) and

$(PREFIX), so I had to hard-code them above. When I start the IOC I get

the following errors:

macLib: macro DEVIOCSTATS is undefined (expanding string

dbLoadRecords("$(DEVIOCSTATS)/db/iocAdminSoft.db", "IOC=$(PREFIX)"))

macLib: macro PREFIX is undefined (expanding string

dbLoadRecords("$(DEVIOCSTATS)/db/iocAdminSoft.db", "IOC=$(PREFIX)"))

I guess I need to do something to ensure these are defined?

Another thing is the steps in [1] mention to compile MSI support, but I

found this was already available on my path after installing EPICS Base.

I skipped editing CONFIG_SITE to define MSI and it all appeared to still

work.

Cheers,
Sean

[1] https://www.slac.stanford.edu/grp/ssrl/spear/epics/site/devIocStats/

On 02/09/2022 14:48, Mark Rivers wrote:

Hi Sean,

To load the iocStats records in your IOC you just need to build your

application with the iocStats dbd and library files like this:

     $(DBD_NAME)_DBD += devIocStats.dbd
     PROD_LIBS        += devIocStats

And add a command like this to your IOC startup script:

dbLoadRecords("$(DEVIOCSTATS)/db/iocAdminSoft.db", "IOC=$(PREFIX)")

Mark

------------------------------------------------------------------------

*From:* Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Sean

Leavey via Tech-talk <tech-talk at aps.anl.gov>

*Sent:* Friday, September 2, 2022 8:25 AM
*To:* tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
*Subject:* Basic iocStats database
Hi all,

Following on from my first question a couple weeks ago about the
feasibility of setting up EPICS for a small lab, I've provisioned a
Debian 11 VM and gotten EPICS Base set up. While I wait for the arrival
of the Modbus-based sensors I plan to use EPICS to read, I thought I'd
set up iocStats

(https://www.slac.stanford.edu/grp/ssrl/spear/epics/site/devIocStats/

<https://www.slac.stanford.edu/grp/ssrl/spear/epics/site/devIocStats/>)

so I have some real world values to play with - CPU usage, etc.

Following various guides I've managed to compile the example application
with iocStats module support. However, I don't actually have any of the
records provided by iocStats configured, and that's where I've gotten
stuck. What I'd really like to see are examples of databases others have
made that make use of the various records provided by iocStats (if such
an example is provided with iocStats itself, I missed it). Ultimately I
want to be able to caget my VM's CPU load, so I can play with archiving
and plotting it later. Google has failed me so I thought I'd ask here.
So, is anyone willing to share their iocStats configurations with me?

Cheers,
Sean

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System