Experimental Physics and
Industrial Control System

Michael Davidsaver <[email protected]> · Thu, 12 Jan 2017 09:30:11 -0500

I only find one functional change to dbCa between .5 and .6 but I can't
see how it would cause this problem.

https://github.com/epics-base/epics-base/commit/c56091978c8d91c95742d49d1315acc478748e3f

If you are game for a little debugging, I'd be interested to know if
connectionCallback() and eventCallback() in dbCa.c are ever executed.

On 01/12/2017 07:38 AM, Mark Rivers wrote:
> Folks,
> 
> We are having problems with all of our vxWorks IOCs.  We recently upgraded from base 3.14.12.5 to 3.14.12.6.  We have not changed the version of vxWorks, which is 6.9.4.1.  We did update the Linux server on which we build and boot the IOCs from Fedora 15 to Centos 7.
> 
> The IOCs work fine as CA servers, all Linux and Windows clients can connect to them fine.  But the IOCs are not working as CA clients.   All records with CA links to other IOCs fail to connect, they have STAT=LINK.    SNL programs can connect to local PVs but not to PVs on other IOCs.  This is true whether the IOC hosting the target PV is running on Linux or VxWorks.
> 
> Here is an example where the DOL field points to a valid PV in another VxWorks IOC.  When I test the record it has STAT=LINK.
> 
> ioc13idc> dbtr "13IDC:filter:EnergyBeamline",10
> ACKS: INVALID       ACKT: YES           ADEL: 0
> ALST: 74.9806201550387                  AOFF: 0             ASG:
> ASLO: 0             BKPT: 00            DESC: 13-ID-C Filters beamline energy
> DISA: 0             DISP: 0             DISS: NO_ALARM      DISV: 1
> DOL:CA_LINK 13BMC:m1.RBV NPP NMS        DRVH: 0             DRVL: 0
> DTYP: Soft Channel  EGU:                EGUF: 0             EGUL: 0
> EOFF: 0             ESLO: 1             EVNT: 0
> FLNK:DB_LINK 13IDC:filter:Energy        HHSV: NO_ALARM      HIGH: 0
> HIHI: 0             HOPR: 0             HSV: NO_ALARM       HYST: 0
> INIT: 0             IVOA: Continue normally                 IVOV: 0
> LALM: 74.9806201550387                  LBRK: 0             LCNT: 0
> LINR: NO CONVERSION LLSV: NO_ALARM      LOLO: 0             LOPR: 0
> LOW: 0              LSV: NO_ALARM       MDEL: 0
> MLST: 74.9806201550387                  NAME: 13IDC:filter:EnergyBeamline
> NSEV: NO_ALARM      NSTA: NO_ALARM      OIF: Full           OMOD: 0
> OMSL: closed_loop   ORAW: 75            ORBV: 0             OROC: 0
> OUT:CONSTANT        OVAL: 74.9806201550387                  PACT: 0
> PHAS: 0             PINI: NO            PREC: 4             PRIO: LOW
> PROC: 1             PUTF: 0             PVAL: 74.9806201550387
> RBV: 0              ROFF: 0             RPRO: 0             RVAL: 75
> SCAN: Passive       SDIS:CONSTANT       SEVR: INVALID       SIML:CONSTANT
> SIMM: NO            SIMS: NO_ALARM      SIOL:CONSTANT       STAT: LINK
> TIME: 2017-01-11 18:11:02.007588962     TPRO: 0             TSE: 0
> TSEL:CONSTANT       UDF: 0              VAL: 74.9806201550387
> value = 0 = 0x0
> 
> However, that 13BMC:m1.RBV PV works fine from Linux caget:
> 
> corvette:~/support/CARS/iocBoot>caget 13BMC:m1.RBV
> 13BMC:m1.RBV                   -0.856875
> 
> The record above works fine with CP links as long as the PVs are local to that IOC.
> 
> This is on a different IOC where the SNL program connects fine to local PVs, but fails to connect to the 2 PVs that are in another IOC.
> 
> epics> seqShow BM13_Energy -
> State Program: "BM13_Energy"
>   thread priority = 50
>   number of state sets = 1
>   number of syncQ queues = 0
>   number of channels = 26
>   number of channels assigned = 26
>   number of channels connected = 24
>   number of channels monitored = 24
>   options: async=0, debug=0, newef=1, reent=0, conn=1
> 
>   State Set: "Energy"
>   thread name = BM13_Energy;  Thread id = 0x211e110
>   First state = "init"
>   Current state = "init"
>   Previous state = "init"
>   Elapsed time since state was entered = -Inf seconds
>   Wake up delay = Inf seconds
>   Get in progress = [00000000000000000000000000]
>   Put in progress = [00000000000000000000000000]
> 
> 
> epics> seqChanShow BM13_Energy -
> State Program: "BM13_Energy"
> Number of channels=26
> View: State set Energy
> 
> #14 of 26:
>   Variable name: "xt_ht"
>     type = double
>     count = 1
>   Value = 0
>   Assigned to "13BMD:m22.VAL"
>   Not connected
>   Monitored
>   Not sync'ed
>   Status = -2
>   Severity = -1
>   Message = disconnected
>   Time stamp = <undefined>
> Next? (+/- skip count)
> 
> 
> This is the output of epicsPrtEnvParams:
> 
> ioc13idc> epicsPrtEnvParams
> EPICS_AR_PORT: 7002
> EPICS_CAS_AUTO_BEACON_ADDR_LIST is undefined
> EPICS_CAS_BEACON_ADDR_LIST is undefined
> EPICS_CAS_BEACON_PERIOD is undefined
> EPICS_CAS_BEACON_PORT is undefined
> EPICS_CAS_IGNORE_ADDR_LIST is undefined
> EPICS_CAS_INTF_ADDR_LIST is undefined
> EPICS_CAS_SERVER_PORT is undefined
> EPICS_CA_ADDR_LIST is undefined
> EPICS_CA_AUTO_ADDR_LIST: YES
> EPICS_CA_BEACON_PERIOD: 15.0
> EPICS_CA_CONN_TMO: 30.0
> EPICS_CA_MAX_ARRAY_BYTES: 88000
> EPICS_CA_MAX_SEARCH_PERIOD: 300.0
> EPICS_CA_NAME_SERVERS is undefined
> EPICS_CA_REPEATER_PORT: 5065
> EPICS_CA_SERVER_PORT: 5064
> EPICS_CMD_PROTO_PORT is undefined
> EPICS_IOC_LOG_FILE_COMMAND is undefined
> EPICS_IOC_LOG_FILE_LIMIT: 1000000
> EPICS_IOC_LOG_FILE_NAME is undefined
> EPICS_IOC_LOG_INET: 164.54.160.182
> EPICS_IOC_LOG_PORT: 7004
> EPICS_TIMEZONE: CUS::360:031302:110602
> EPICS_TS_NTP_INET is undefined
> IOCSH_HISTSIZE: 50
> IOCSH_PS1: epics>
> value = 0 = 0x0
> 
> This is the output of the "version" and "coreRelease" commands on vxWorks.
> 
> ioc13bma> version
> VxWorks (for Motorola MVME2700 - MPC 750) version 6.9.4.1.
> Kernel: WIND version 2.13.
> Made on Jul 27 2015 17:59:12.
> Boot line:
> dc(0,0)corvette:/usr/local/vw/VX6941/mv2700-dev6-debug e=164.54.160.74:ffffff00 h=164.54.160.82 u=iocboot tn=ioc13bma s=/home/epics/support/CARS/iocBoot/ioc13bma/st.cmd
> value = 180 = 0xb4
> 
> ioc13bma> coreRelease
> ############################################################################
> ## EPICS R3.14.12.6
> ## EPICS Base built Jan  9 2017
> ############################################################################
> value = 0 = 0x0
> ioc13bma>
> 
> 
> Any ideas on what the problem could be and any diagnostics to run to track it down?
> 
> Thanks,
> Mark
> 
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System