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  1. JDK
  2. JDK-8153224 Monitor deflation prolong safepoints
  3. JDK-8235795

replace monitor list mux{Acquire,Release}(&gListLock) with spin locks

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Details

    • Sub-task
    • Resolution: Fixed
    • P4
    • 15
    • 8u72, 9, 15
    • hotspot
    • b09

    Description

      A comment from the JDK-8153224 review thread:

      > Most of the comments in the CR8/v2.08/11-for-jdk14 code review cycle were
      > on the monitor list changes so I'm going to take a look at extracting those
      > changes into a standalone patch. Switching from Thread::muxAcquire(&gListLock)
      > and Thread::muxRelease(&gListLock) to finer grained internal spin locks needs
      > to be thoroughly reviewed and the best way to do that is separately from the
      > Async Monitor Deflation changes. Thanks to Coleen for suggesting doing this
      > extraction earlier.

      This subtask is split off from the Async Monitor Deflation project
      that is tracked by JDK-8153224.

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        Issue Links

          blocks

          Enhancement - null JDK-8225631 Consider replacing muxAcquire/Release with PlatformMonitor

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

          Enhancement - null JDK-8238370 ObjectSynchronizer::om_release() could be simplified

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

          Enhancement - null JDK-8238371 ObjectSynchronizer::om_alloc() does not have to be public

          • 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-8246676 monitor list lock operations need more fencing

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8238766 Perf regression on promo benchmark with 15-b9

          • P3 - Major loss of function.
          • Closed
          links to

          Commit Commit openjdk/panama-foreign/a7a82b0c

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              dcubed Daniel Daugherty
              dcubed Daniel Daugherty
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              Dates

                Created:
                Updated:
                Resolved: