Re: enable pvAccess by default

["Johnson, Andrew N. via Tech-talk" <tech-talk at aps.anl.gov>]

Hi William,

 

On 3/31/24, 3:53 PM, "Tech-talk" tech-talk-bounces at aps.anl.gov wrote:

I would like to know if you have already considered activating pvAccess

for softIOCs by default.

 

How is what you're asking for different than the softiocPVA executable that we already build in the pva2pva module?

 

I would probably adapt the Makefile template and simply copy the section

from the example IOC:

 

# Link QSRV (pvAccess Server) if available

ifdef EPICS_QSRV_MAJOR_VERSION

    _APPNAME__LIBS += qsrv

    _APPNAME__LIBS += $(EPICS_BASE_PVA_CORE_LIBS)

    _APPNAME__DBD += PVAServerRegister.dbd

    _APPNAME__DBD += qsrv.dbd

endif

 

Ultimately, this should not affect any old system, as pvAccess is only

loaded if it is also present in base?

 

PV Access has been part of Base since the first EPICS 7.0.1 release, but many sites aren't building it into all their IOCs — at the APS we use it in AreaDetector camera IOCs and our DAQ systems, but don't build it into our regular EPICS 7 IOCs yet. The extra libraries and threads that it starts would take up resources on our systems.

 

HTH,

 

- Andrew

 

-- 

Complexity comes for free, Simplicity you have to work for.

 

 

thanks in advance,

 

--

William Kirstaedter

PP&B Computer Support Group

Fritz-Haber-Institut Berlin