IV29473: TEST FAILURES WITH LARGE OPENMP THREAD COUNTS.

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When running test cases in 32 bit mode that make use of large
    OpenMP thread counts, the resulting binary produces one of the
    following issues:
    
    * Illegal instructions
    * Segmentation violations
    * Internal errors reported by MPI
       (e.g. ERROR: 0032-117 User pack or receive buffer is too
    small  (22960) in MPI_Recv )
    * Internal errors reported by the application.
    

Local fix

  • n/a
    

Problem summary

  • Users Affected:
    Users who have test cases that make use of large OpenMP thread
    counts are potentially affected by this issue.
    
    Problem Description:
    The internal implementation of certain OpenMP tasks were missing
    a lock and was optimized incorrectly.
    

Problem conclusion

  • The OpemMP has been fixed.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV29473

  • Reported component name

    XL SMP AIX

  • Reported component ID

    5725C7401

  • Reported release

    310

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-03

  • Closed date

    2012-10-03

  • Last modified date

    2012-11-07

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

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

    LI77164

Fix information

  • Fixed component name

    XL SMP AIX

  • Fixed component ID

    5725C7401

Applicable component levels

  • R310 PSY U856059

       UP C



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Document information


More support for:

XL C/C++ for AIX

Software version:

12.1

Reference #:

IV29473

Modified date:

2012-11-07

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