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  1. JDK
  2. JDK-8221360

Eliminate Shared_DirtyCardQ_lock

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    • gc
    • b12

    Description

      G1SharedDirtyCardQueue is lock-based, using Shared_DirtyCardQ_lock, which needs to have access-related rank. It could be made lock-free.

      Making it lock-free involves some additional complexity. There is a tradeoff between that complexity vs having an access-related rank lock. The situation where the shared queue is needed is extremely rare, so contention for the lock isn't an issue.

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          Enhancement - null JDK-8272480 Remove Mutex::access rank

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

          Enhancement - null JDK-8139652 Mutator refinement processing should take the oldest dirty card buffer

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8214997 Crash holding 'access' lock can deadlock in JVMCI compiler thread

          • 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-8279957 Main refinement thread tries to wake up itself when re-enqueuing causing assertion failure

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

          Enhancement - null JDK-8220240 Refactor shared dirty card queue

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

          Commit Commit openjdk/jdk/0597cde8

          Review Review openjdk/jdk/5118

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              kbarrett Kim Barrett
              kbarrett Kim Barrett
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                Updated:
                Resolved: