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  1. JDK
  2. JDK-7011379

G1: overly long concurrent marking cycles

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Details

    • Bug
    • Resolution: Fixed
    • P3
    • hs20
    • hs20
    • hotspot
    • gc
    • b07
    • generic
    • generic
    • Not verified

    Backports

      Description

        While running jbb2005 with G1 on a 16-core UltraSPARC IV+ I noticed that marking cycles would start but never complete. This will cause Full GCs and poor scores.

        The reason that is causing this is that the concurrent marking threads cannot keep up by the rate the mutator threads generate SATB buffers and are overwhelmed.

        It would be nice to reduce the number of SATB buffers generated by the mutator threads.

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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-2205644 G1: overly long concurrent marking cycles

            • P3 - Major loss of function.
            • Resolved

            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-2206212 G1: overly long concurrent marking cycles

            • P3 - Major loss of function.
            • Closed

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                tonyp Tony Printezis
                tonyp Tony Printezis
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