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IV12259: JAVA JIT - POSSIBLE PERFORMANCE REGRESSION IN ARRAY COPY

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
    .
    Stack Trace: N/A
    .
    Problem in LinuxPPC 32/64 only, customer may observe a higher
    fluctuation in performance on test cases that performs array
    copy
    

Local fix

  • N/A.
    

Problem summary

  • The problem is caused by the build compiler for LinuxPPC 32/64
    bit misinterpreting a simplified version of an assembly
    instruction.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.0 SR10
    6.0.1 SR2
    7.0.0 SR1
    .
    The JIT compiler is updated by replacing the offending assembly
    instruction to the full form, allowing the build compiler to
    produce the correct code.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV12259

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-12-17

  • Closed date

    2011-12-17

  • Last modified date

    2011-12-17

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

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

Fix information

  • Fixed component name

    JIT

  • Fixed component ID

    620700124

Applicable component levels

  • R600 PSY

       UP

  • R260 PSY

       UP



Document information

More support for: Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version: 6.0

Reference #: IV12259

Modified date: 17 December 2011