IV93884: PROBLEMS CAN OCCUR WITH THREAD_CPUTIME AND THREAD_CPUTIME_FAST APPLIES TO AIX 7100-03 17/04/21 PTF PECHANGE

APAR status

• Closed as program error.

Error description

• ****************************************************************
  * USERS AFFECTED:
  * Systems running the AIX 7100-03 Technology Level
  * with bos.mp64 at the 7.1.3.49 level.
  ****************************************************************
  * ERROR DESCRIPTION:
  * In the latest AIX Service Packs, using the thread_cputime or
  * thread_cputime_fast interfaces can cause
  * invalid data in the floating point and vector registers.
  *
  * This has been primarily seen to affect Oracle 11gR2 (11.2.0.3
  * and 11.2.0.4), which use this interface.
  * Multiple errors have been seen in these Oracle 11gR2 releases
  * as a result of this issue, including:
  * - ORA 600 errors
  * - oracle process core dump
  * - errors in redo logs and check sum errors in other blocks
  ****************************************************************
  * RECOMMENDATION:
  * Install APAR IV93884.
  * Prior to fix availability, an interim fix is available from
  * either
  * ftp://aix.software.ibm.com/aix/ifixes/iv93884/
  * https://aix.software.ibm.com/aix/ifixes/iv93884/
  * Installation of the ifix requires a reboot.
  ****************************************************************
  

Local fix

Problem summary

• The thread_cputime or thread_cputime_fast interfaces can
  cause invalid data in the FP/VMX/VSX registers if the thread
  page faults in this function.
  

Problem conclusion

• Remove potential for page fault.
  

Temporary fix

•   *********
    * HIPER *
    *********
  

Comments

APAR Information

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

  IV93845

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

  U876501

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U876501

     UP17/04/14 I 1000 Ž