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  1. JDK
  2. JDK-8150364

Clear CT phase work distribution too fine-grained

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    • Subcomponent:
      gc

      Description

      In the Clear CT phase threads race to clean the card tables for regions. They claim regions using atomic operations.

      Testing found that the distribution granularity of the card table of a single region is too small: profiling with hardware counters indicate that the atomic operation is a significant part of the pause.

      Fix this by changing the way G1 remembers regions that need cleaning and improve the ratio between useful work and synchronization

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              • Assignee:
                Unassigned
                Reporter:
                tschatzl Thomas Schatzl
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