IV02042: JAXB UNMARSHAL PERFORMANCE REGRESSED DUE TO -XGCPOLICY:GENCON VS -XGCPOLICY:OPTTHRUPUT

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
    .
    Stack Trace: N/A
    .
    JAXB unmarshal performance regressed due to default GC policy
    change to -Xgcpolicy:gencon from -Xgcpolicy:optthruput in Java
    6.0.1.
    

Local fix

  • Depending on the application, a customer may elect to run with
    -Xgcpolicy:optthruput to alleviate the performance bottleneck.
    

Problem summary

  • Extra overhead is spent in write barrier helpers
    jitWriteBarrierStore* related to GC policy gencon.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.1 GA FP1
    .
    The JVM has been updated to reduce the overhead associated with
    the write barrier helper routines.
    .
    To obtain the fix:
    Install build 20110227 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV02042

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-06-16

  • Closed date

    2011-06-16

  • Last modified date

    2011-06-16

  • 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


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

260

Reference #:

IV02042

Modified date:

2011-06-16

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