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  1. JDK
  2. JDK-8077144

Concurrent mark initialization takes too long

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    • gc
    • b116
    • Not verified

      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

        1. 8077144-concurrent-mark-thread-init-fix
          11 kB
        2. gclog.150403-142811.log.zip
          6.88 MB

            tschatzl Thomas Schatzl
            tschatzl Thomas Schatzl
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              Created:
              Updated:
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