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  1. JDK
  2. JDK-8221102

Allow GC threads to participate in threads claiming protocol

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    • gc
    • b15
    • generic
    • generic
    • Not verified

    Description

      JDK-8219613 introduced SATB queues for NonJavaThreads. In Shenandoah (and likely G1) the StringDedupThread needs SATB queues. Also, in Shenandoah, all threads' SATB queues get flushed at end of marking using the thread claiming protocol. Currently, only Java threads and the VMThread participate in this, which means that the StringDedupThread will not have its SATB queue flushed at the end.
      This change is proposing a mechanism to allow (some) GC threads to participate in thread claiming.

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          Enhancement - null JDK-8221435 Shenandoah should not mark through weak roots

          • P3 - Major loss of function.
          • Resolved
          relates to

          Enhancement - null JDK-8221785 Let possibly_parallel_threads_do cover the same threads as threads_do

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8221516 fatal error: Thread SATB queue has an unexpected active state

          • P2 - Crashes, loss of data, severe memory leak.
          • Resolved

          Enhancement - null JDK-8219613 Use NonJavaThread PtrQueues

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

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              kbarrett Kim Barrett
              rkennke Roman Kennke
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                Updated:
                Resolved: