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  1. JDK
  2. JDK-6849716

BitMap: performance regression introduced with G1

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    • Bug
    • Resolution: Fixed
    • P2
    • hs16
    • hs14
    • hotspot
    • gc
    • b06
    • b05
    • generic
    • generic

    Backports

      Description

        The G1 integration (6711316: Open source the Garbage-First garbage collector) introduced a large performance regression in BitMap operations which are used heavily by parallel compaction. A synthetic benchmark shows a 50% increase in full gc time w/parallel compaction after 6711316.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-2179585 BitMap: performance regression introduced with G1

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-2180647 BitMap: performance regression introduced with G1

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed
            relates to

            Enhancement - null JDK-6814552 par compact - some compilers fail to optimize bitmap code

            • P3 - Major loss of function.
            • Resolved

            Enhancement - null JDK-6711316 Open source the Garbage-First garbage collector

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

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                jcoomes John Coomes (Inactive)
                jcoomes John Coomes (Inactive)
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