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  1. JDK
  2. JDK-8140326

G1: Consider putting regions where evacuation failed into next collection set

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    • gc

    Description

      A common case in evacuation failure is that only a very small subset of the original contents of the region experiencing the failure is live.
      We mark the region as old and basically completely full.

      This is a waste of space. A following GC could clean them out cheaply in many cases.

      May also be very interesting in case of pinned regions, i.e. clean the affected regions out in the next gc.

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          relates to

          Enhancement - null JDK-7162317 G1: Explicitly mark self-forwarded objects during marking cycles

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

          Enhancement - null JDK-8300770 G1: Allow optional code root memregions

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

          Enhancement - null JDK-8251288 G1: Young gen sizing should take short-living humongous object allocation into account

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

          JEP - Java Enhancement Proposal JDK-8276094 JEP 423: Region Pinning for G1

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

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              tschatzl Thomas Schatzl
              tschatzl Thomas Schatzl
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                Created:
                Updated: