IV01624: ALLOCATING A TLH IS SLOW AND BLOCKS OTHER THREADS ON THE SAME NU MA NODE WHEN RUNNING BALANCED GC POLICY

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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
    .
    

Local fix

Problem summary

  • The problem is observed when more than one thread on the same
    NUMA node tries to allocate a TLH (for object allocation) at the
    same time.  The bug causes them to slow each other down.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.1 GA FP1
    .
    An extraneous contention point between these threads has been
    removed so multi-threaded TLH allocation should cause minimal
    contention.
    .
    To obtain the fix:
    Install build 20110211 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV01624

  • Reported component name

    J9 COMMON CODE

  • Reported component ID

    620700127

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-06-10

  • Closed date

    2011-06-11

  • Last modified date

    2011-06-11

  • 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

    J9 COMMON CODE

  • Fixed component ID

    620700127

Applicable component levels

  • R260 PSY

       UP



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Document information


More support for:

Runtimes for Java Technology
Virtual Machine

Software version:

260

Reference #:

IV01624

Modified date:

2011-06-11

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