IBM Support

IV45369: EXPERIMENTAL JAVA JIT INLINING FOR METHOD INVOCATION VIA REFLECT ION

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
    .
    Stack Trace: N/A
    .
    This APAR adds an experimental option to speed up method
    invocation using reflection by performing additional inlining.
    This option is DISABLED by default in Java 6.0.1 and Java 7.
    The experimental code can be enabled by using:
    
    -Xjit:enableFastReflectMethodInvoke
    
    This option is UNSUPPORTED unless a customer is directed to use
    it by IBM JIT compiler support. This feature is planned to be
    enabled by default in the next major release of Java.
    

Local fix

Problem summary

  • Under extreme conditions the performance of a Java application
    can be limited by the cost of executing methods using
    reflection.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.1 SR7
    7.0.0 SR6
    .
    When the enableFastReflectMethodInvoke option is in effect the
    JIT will inline some aspects of method invocation using
    reflection.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV45369

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-07-08

  • Closed date

    2013-07-10

  • Last modified date

    2013-08-26

  • 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

  • R260 PSY

       UP

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Document Information

Modified date:
26 August 2013