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  1. JDK
  2. JDK-8276887

G1: Move precleaning to Concurrent Mark From Roots subphase

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    • Enhancement
    • Resolution: Unresolved
    • P4
    • tbd
    • 18
    • hotspot
    • gc

    Description

      Currently, `Concurrent Mark` (in `G1ConcurrentMarkThread::phase_mark_loop`) consists of four subphases: 1. mark from roots, 2. preclean, 3. wait for remark, and 4. remark pause. "preclean" processes non-strong refs using a single gc thread.

      One can move precleaning inside the first subphase to make it parallel automatically.

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          is blocked by

          Enhancement - null JDK-8279456 Make ReferenceProcessor::_num_queues external immutable

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

          Review Review openjdk/jdk/6327

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              ayang Albert Yang
              ayang Albert Yang
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                Created:
                Updated: