PJ41138: PROVIDE TOD CLOCK VALIDATION MONITOR.

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APAR status

  • Closed as program error.

Error description

  • See Problem Summary.
    

Local fix

  • n/a
    

Problem summary

  • APAR NUMBER:  PJ41138
    PRODUCT:  z/TPF
    FUNCTIONAL AREA:  TOD CLOCK RPQ SUPPORT
    SHIPPED IN PUT:  10
    
    ABSTRACT:
    Provide TOD clock validation monitor.
    
    PACKAGE CONTENTS:
    Source Segments:
    (C) hpo/rt/ctdv.c
    
    Object Only Binaries:
    None.
    
    Configuration Independent Binaries:
    (C) hpo/obj/ctdv.o
    (C) hpo/load/CTDV.so
    
    Support Files:
    hpo/lst/ctdv.lst
    hpo/lst/CTDV.map
    
    OTHER BINARIES TO BUILD: NO
    None.
    
    COMMENTS:
    A need exists to determine if the time of day (TOD) clock is
    not synchronized between the processors in a loosely coupled
    complex.
    
    Currently, a TOD clock validation process exists. When a
    processor is IPLed, restart calls program CTDV. CTDV gets the
    current TOD clock value (TOD value 1) and sends a SIPCC to all
    processors in the loosely coupled complex. The other processors
    will get their current TOD clock value (TOD value 2) and sends
    a SIPCC back to the requesting processor. On return to the
    originating processor, the current TOD clock value (TOD value
    3) is obtained again. The three TOD clock values are compared.
    TOD value 1 must be less than TOD value 2 and TOD value 2 must
    be less than TOD value 3. If this is not true, then the TOD
    clock is not synchronized in the loosely coupled complex.
    
    The current TOD clock validation process in program CTDV is
    called only in restart. If an error happens when the processor
    is in norm state and the TOD clock loses synchronization, there
    is no monitor to report that the TOD clock is not synchronized.
    

Problem conclusion

  • SOLUTION:
    The current TOD clock validation process has been enhanced to
    be a monitor. Program CTDV continues to do the same TOD clock
    validation process except now this process is done every minute.
    
    In addition, if the TOD clock is no longer synchronized,
    warning message CTDV0005W now includes additional information.
    First, the amount of time that the TOD clock has not been
    synchronized is provided. Seconds, the three TOD clock values
    that were used in the compare is also provided. This added
    information provides an indication of how far out of synch the
    TOD clock is.
    
    The CTDV0005W warning message will be sent for the first five
    minutes after the loss of TOD synchronization is discovered.
    Afterwards, the message will be sent four times an hour or
    every 15 minutes.
    
    COREQS: NO
    None.
    
    MIGRATION CONSIDERATIONS: YES
    Functional, automation, and operation changes:
    CTDV0005W provides additional information.
    
    Coexistence, migration, and fallback considerations:
    Program CTDV is activated in restart.  This means that the TOD
    clock validation monitor is started in restart.  When program
    CTDV is loaded, you can start the monitor in norm state with
    the following ZACRT command:
    
    ==> ZACRT TYPE-MINUTE PGM-CTDV TIME-1 STATE-1052 PARM-FE000000
    
    
    
    BUILD COMMANDS AND INSTRUCTIONS: YES
    #maketpf commands for linux
    maketpf -f CTDV ctdv.o
    maketpf CTDV link
    
    UPDATED INFORMATION UNITS: YES
    z/TPF Messages (Online, SQLCODEs, and errno Values)
    
    See your IBM representative if you need additional information.
    
    DOWNLOAD INSTRUCTIONS:
    http://www.ibm.com/software/htp/tpf/maint/maintztpf.html
    
    APAR URL:
    http://www.ibm.com/software/htp/tpf/ztpfmaint/put10/PJ41138.htm
    

Temporary fix

Comments

APAR Information

  • APAR number

    PJ41138

  • Reported component name

    Z/TPF

  • Reported component ID

    5748T1501

  • Reported release

    110

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-04-08

  • Closed date

    2013-04-19

  • Last modified date

    2013-04-19

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Publications Referenced
SK2T8062        

Fix information

  • Fixed component name

    Z/TPF

  • Fixed component ID

    5748T1501

Applicable component levels

  • R110 PSY

       UP



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Document information


More support for:

TPF
z/TPF

Software version:

110

Reference #:

PJ41138

Modified date:

2013-04-19

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