OA43102: NEW FUNCTION - ZAAP ON ZIIP FUNCTION

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• new function
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of z/OS 1.13 (HBB7780) and         *
  *                 z/OS 1.12 (HBB7770)                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: z/OS no longer limits the zAAP on zIIP  *
  *                      function based on the number of zAAPs   *
  *                      and/or the number of zIIPs installed on *
  *                      the machine. The zAAP on zIIP function  *
  *                      continues to be limited to LPARs that   *
  *                      have no zAAP.                           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The ZAAPZIIP (or ZZ as its alias) parameter for IEASYSxx
  (system parameter list) is used to request that the system runs
  zAAP eligible work on zIIP when certain conditions are met.
  The zAAP on zIIP function is active only when all of the
  following conditions are true:
  (a) ZAAPZIIP=YES is specified or defaulted.
  (b) There are (or could be, through dynamic CPU addition)
      zIIP(s) defined to this LPAR.
  (c) No zAAPs are defined to this LPAR, whether online, offline
      or in the reserved state.
  (d) When there is at least one zAAP installed, the number of
      installed zAAPs plus the number of installed zIIPs does not
      exceed the number of installed standard CPs.
  (e) The LPAR is allowed to find out about the presence of
      zAAPs on the entire machine (this security protocol is
      controlled by the Global Performance Data Control setting)
  Conditions (d) and (e) are now removed from z/OS.
  The zIIP/zAAP ratio will be enforced by the ordering system.
  

Problem conclusion

Temporary fix

Comments

• IRASR204 has been updated to remove the following two conditions
  when enforcing the enablement requirements for the zAAP on zIIP
  function:
  - the LPAR is allowed to find out about the presence of zAAPs
    on the machine
  - the number of zAAPs and/or zIIPs is not greater than the
    number of standard CPs.
  All of the other required conditions must still be met in order
  for the the zAAP on zIIP function to be enabled.
  
  +--- Documentation to be updated ------------------------------+
  |                                                              |
  |   z/OS V1R13.0 MVS Initialization and Tuning Reference       |
  |                                                              |
  |   z/OS V1R12.0 MVS Initialization and Tuning Reference       |
  |                                                              |
  +--- Location in Publication ----------------------------------+
  |                                                              |
  | Statements/parameters for IEASYSxx - ZAAPZIIP                |
  |                                                              |
  | In the list of conditions for the zAAP on zIIP function      |
  | being active, following bullets are removed:                 |
  |                                                              |
  | - There are no zAAPs installed on the machine or, when       |
  |   there is at least one zAAP installed, the number of        |
  |   installed zAAPs plus the number of installed zIIPs         |
  |   does not exceed the number of installed standard CPs.      |
  |   The installed processors mentioned in the preceding        |
  |   sentence are those in the configured state only;           |
  |   processors in the standby or reserved state do not         |
  |   apply.                                                     |
  |                                                              |
  | - This LPAR is allowed to find out about the presence        |
  |   of zAAPs on the entire machine. This security protocol     |
  |   is controlled by the Global Performance Data Control       |
  |   setting                                                    |
  |                                                              |
  +--------------------------------------------------------------+
  +--- Documentation to be updated ------------------------------+
  |                                                              |
  |   z/OS V1R13.0 MVS System Messages, Vol 7 (IEB-IEE)          |
  |                                                              |
  |   z/OS V1R12.0 MVS System Messages, Vol 7 (IEB-IEE)          |
  |                                                              |
  +--- Location in Publication ----------------------------------+
  |                                                              |
  | Message IEE256I (msIEE256I):                                 |
  | IEE256I lists possible states for the ZAAPZIIP function,     |
  | including reasons why ZAAPZIIP is inactive.                  |
  | The following reasons are removed:                           |
  |                                                              |
  | - INACTIVE - ZAAP(S) INSTALLED ON THE MACHINE                |
  | - INACTIVE - TOO MANY ZAAPS+ZIIPS INSTALLED ON THE MACHINE   |
  | - INACTIVE - GLOBAL MACHINE DATA IS NOT AVAILABLE TO THIS    |
  |              LPAR                                            |
  |                                                              |
  +--------------------------------------------------------------+
  
  D/T2827   D/T2828   ZIIP/K   ZAAP/K
  

APAR Information

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

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

  UA70745 UA70746

Modules/Macros

•    IRASR204
  

Fix information

• Fixed component name

  SRM - SYS RSRCE

• Fixed component ID

  5752SC1CX

Applicable component levels

• R770 PSY UA70745

     UP13/09/25 P F309

• R780 PSY UA70746

     UP13/09/25 P F309

Fix is available

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