PJ40836: ISSUE WITH USING NTP/STP TIMER SUPPORT

APAR status

• Closed as program error.

Error description

• See Problem Summary.
  

Local fix

• na
  

Problem summary

• APAR NUMBER:  PJ40836
  PRODUCT:  z/TPF
  FUNCTIONAL AREA:  CLOCKS
  SHIPPED IN PUT:  10
  
  ABSTRACT:
  Due to the special STP configuration APAR PJ39209, the TOD
  clock on a processor in a loosely coupled complex may not be
  confirmed.
  
  PACKAGE CONTENTS:
  Source Segments:
  (C) hpo/rt/cqak.asm
  
  Object Only Binaries:
  None.
  
  Configuration Independent Binaries:
  (C) hpo/obj/cqak.o
  (C) hpo/load/CQAK.so
  
  Support Files:
  hpo/lst/cqak.lst
  hpo/lst/CQAK.map
  
  OTHER BINARIES TO BUILD: NO
  None.
  
  COMMENTS:
  When the special STP configuration is used in a loosely coupled
  complex, there is only one processor whose entry in keypoint I
  (CTKI) shows that its TOD clock is confirmed. The processor
  where ZATIM xxxx TOD GOOD SSTP was input shows as TOD clock
  confirmed. The CTKI entry for all other processors show that
  the TOD clock is not confirmed.
  
  The processor where ZATIM xxxx TOD GOOD SSTP is input is the
  TOD clock master processor.
  
  When a processor in the loosely coupled complex is IPLed, the
  TOD clock must be confirmed. When the special STP configuration
  is used and when the CTKI entry for the IPLing processor does
  not show TOD clock confirmation, a SIPCC is done to all other
  processors in the complex requesting TOD clock confirmation.
  Because the TOD clock master processor is the only processor
  whose CTKI entry shows TOD clock confirmed, only the TOD clock
  master processor responds to the SIPCC request.
  
  If the TOD clock master processor is taken out of the complex
  and another processor IPLs, no processor will respond to the
  SIPCC request for TOD clock confirmation. As a result the
  processor that is IPLing will stop is restart waiting for TOD
  clock confirmation. In order to allow the processor to continue
  in restart, the operator will need to do ZATIM xxxx TOD GOOD
  SSTP BP on the processor. As a result the TOD clock master
  processor will change.
  
  When the special STP configuration is used, all processors in
  the loosely coupled complex should be shown as TOD clock
  confirmed in CTKI. This will eliminate the problem of having to
  do a ZATIM xxxx TOD GOOD SSTP BP when a processor is IPLed and
  the master TOD processor is not in the loosely coupled complex.
  

Problem conclusion

• SOLUTION:
  Program CQAK has been updated. The purpose of the change is to
  show the TOD clock as confirmed in CTKI for all processors and
  not just the TOD clock master processor.
  
  When the special STP configuration is used and a processor
  IPLs, a SIPCC is sent to all processors. When a response is
  received from a processor whose TOD clock is confirmed, program
  CQAK is entered. CQAK has been changed to not set indicator
  "incompatible with sync source" (SC0TACC) if the special STP
  configuration is in use. Because SC0TACC is not set CQAK will
  updates CTKI to show that this processor's TOD clock is
  confirmed.
  
  COREQS: NO
  None.
  
  MIGRATION CONSIDERATIONS: NO
  None.
  
  BUILD COMMANDS AND INSTRUCTIONS: YES
  #maketpf commands for linux
  maketpf -f CQAK cqak.o
  maketpf CQAK link
  
  UPDATED INFORMATION UNITS: NO
  None.
  
  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/PJ40836.htm
  

Temporary fix

Comments

APAR Information

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

  PJ40833

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

Fix information

• Fixed component name

  Z/TPF

• Fixed component ID

  5748T1501

Applicable component levels

• R110 PSY

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