OA51549: HIGHER THAN EXPECTED GENERAL PURPOSE CPU USAGE WITH ACCESS MONITOR WHEN ZIIPS ARE PRESENT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Higher than expected general purpose CPU usage is seen for
  applications whose workload is eligible for zIIP processing
  when Access Monitor is enabled.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of the zSecure Access Monitor (started *
  *                 task) exploiting the software on systems     *
  *                 with IBM z Systems Integrated Information    *
  *                 Processor(s) (zIIP).                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: The zSecure Access Monitor started task *
  *                      might consume an excessive amount of    *
  *                      the central processor time on systems   *
  *                      equipped with the IBM z Systems         *
  *                      Integrated Information Processor(s)     *
  *                      (zIIP).                                 *
  ****************************************************************
  * RECOMMENDATION: Apply the PTF provided and review the        *
  *                 documentation updates supplied.              *
  ****************************************************************
  When the zSecure Access Monitor started task is running on
  systems equipped with the IBM z Systems Integrated Information
  Processor(s) (zIIP), it still uses an excessive amount of the
  central processor time.
  

Problem conclusion

• zSecure Access Monitor started task has been modified so that
  the amount of central processor time used by the software is
  reduced on systems equipped with IBM z Systems Integrated
  Information Processor(s) (zIIP). Please note the documentation
  changes as provided by the APAR tracking comment data.
  

Temporary fix

Comments

APAR Information

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

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

  UA83287 UA91582

Modules/Macros

•    C2PACMON C2PAMSTS C2PCLEAN C2PENVLP C2PINIT
  C2POLICE C2PPRSRC C2PRACRT C2PRCY02 C2PRDY02 C2PRFY04 C2PRIY02
  C2PRPTHR C2PSMFPC C2PXINIT C2XACTV  HCKR220J HCKR221J
  

Fix information

• Fixed component name

  ZSEC BASE,ADMIN

• Fixed component ID

  5655T0100

Applicable component levels

• R220 PSY UA83287

     UP17/04/21 P F704

• R221 PSY UA91582

     UP17/04/21 P F704

Fix is available

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