Experimental Physics and
Industrial Control System

"LYNCH, Damien" <[email protected]> · Tue, 17 Nov 2009 11:20:47 +1100

Hi Tim,

It looks like the modified sscanRecod.c file has fixed the problem. I
started the IOC 500 times and could not reproduce the problem. Thanks
for that, and thanks to Mark as well.

Damien

> -----Original Message-----
> From: Tim Mooney [mailto:[email protected]]
> Sent: Tuesday, 17 November 2009 10:18 AM
> To: LYNCH, Damien
> Cc: [email protected]
> Subject: Re: sscan, asyn and mutexes [SEC=UNCLASSIFIED]
> 
> Damien,
> I think the problem might that version 2-6-5 of the sscan module is
not
> ready for a 64-bit architecture. sscanRecord.c contains some
structures
> that are supposed to match exactly the record structure defined in the
> sscanRecord.h include file, which is generated by the EPICS build from
> sscanRecord.dbd. But the definitions in sscanRecord.c do not match
> exactly anymore, and the code must be modified. Mark Rivers did this,
> but I haven't published a version of the sscan module with Mark's
fixes.
> I'm sending you a copy of the most recent sscanRecord.c, but I'll not
> blast it to all tech-talk recipients. Please try this and see if the
> problem goes away or at least changes.
> 
> Tim
> 
> LYNCH, Damien wrote:
> > Has anyone run into the following mutex locking failure before? I
have
> > only seen the problem when drvSerialPortConfigure is called and a
sscan
> > record is loaded. In the example below there is only the sscan
record
> > specified in sscantest.db. Occasionally the IOC will start fine.
> > We have been running an IOC using base 3.14.9, asyn 4.9 and sscan
2-5-6
> > and never seen this problem.
> >
> >
> > dly@antares14:~/sscantest/iocBoot/iocsscantest>
> > ../../bin/linux-x86_64/sscantest st.cmd
> > #!../../bin/linux-x86_64/sscantest
> > ## You may have to change sscantest to something else
> > ## everywhere it appears in this file
> > < envPaths
> > epicsEnvSet("ARCH","linux-x86_64")
> > epicsEnvSet("IOC","iocsscantest")
> > epicsEnvSet("TOP","/home/dly/sscantest")
> > epicsEnvSet("ASYN","/usr/local/src/EPICS/asyn/4-12")
> > epicsEnvSet("SSCAN","/usr/local/src/EPICS/sscan/2-6-5")
> > epicsEnvSet("EPICS_BASE","/usr/local/src/EPICS/base-3.14.11")
> > cd /home/dly/sscantest
> > ## Register all support components
> > dbLoadDatabase "dbd/sscantest.dbd"
> > sscantest_registerRecordDeviceDriver pdbbase
> > drvAsynSerialPortConfigure("src", "/dev/ttyr07")
> > ## Load record instances
> > dbLoadRecords("db/sscantest.db","user=dlyHost")
> > cd /home/dly/sscantest/iocBoot/iocsscantest
> > iocInit
> > Starting iocInit
> >
########################################################################
> > ####
> > ## EPICS R3.14.11 $R3-14-11$ $2009/08/28 18:47:36$
> > ## EPICS Base built Nov 16 2009
> >
########################################################################
> > ####
> >
> >
> >
> > A call to 'assert(status == epicsMutexLockOK)'
> >     by thread '_main_' failed in ../dbPvdLib.c line 90.
> > EPICS Release EPICS R3.14.11 $R3-14-11$ $2009/08/28 18:47:36$.
> > Local time is 2009-11-16 14:24:25.500100161 EST
> > Please E-mail this message to the author or to [email protected]
> > Calling epicsThreadSuspendSelf()
> >
> >
> > Thanks,
> > Damien Lynch
> > Accelerator IT Systems Engineer
> > Institute of Environmental Research
> > Australian Nuclear Science and Technology Organisation
> > PMB 1, Menai NSW 2234
> >
> > Important: This transmission is intended only for the use of the
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> >
> >
> >
> >
> 
> 
> --
> Tim Mooney ([email protected]) (630)252-5417
> Beamline Controls & Data Acquisition Group (www.aps.anl.gov/aod/bcda)
> Advanced Photon Source, Argonne National Lab

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System