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  1. JDK
  2. JDK-8077144

Concurrent mark initialization takes too long

    Details

    • Subcomponent:
      gc
    • Resolved In Build:
      b116
    • Verification:
      Not verified

      Description

      Concurrent mark needs to clear internal data structures (in ConcurrentMark::clear_all_count_data()) every marking cycle.

      This data structure can get really huge (80G+ @ 3T heap with 800 threads), so it takes a long time to process that data structure by a single thread.

      Even startup is delayed by ~15mins by that on such machines

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              • Assignee:
                tschatzl Thomas Schatzl
                Reporter:
                tschatzl Thomas Schatzl
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                • Created:
                  Updated:
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