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  1. JDK
  2. JDK-8242088

Replace mutually exclusive lists with concurrent alternatives

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Details

    • Enhancement
    • Resolution: Fixed
    • P3
    • 15
    • 14
    • hotspot
    • jfr
    • b27

    Description

      The basic JFR data structure used to keep memory buffers are currently doubly-linked and are accessed mutually exclusive on writes. This can lead to stalls in certain situations where the lists are heavily traversed for space. This is especially the case when writing larger-than thread local sized events, which are rare in practice but there are currently some tests that provoke this situation. This can cause the VM to have to wait a long time to reach a safepoint.

      A mostly concurrent, although not necessarily non-blocking, implementation could avoid this bottleneck and improve overall levels of concurrency.

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          blocks

          Enhancement - null JDK-8198730 Improve detection of failure to reach a safepoint

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

          Sub-task - The sub-task of the issue JDK-8242071 JfrDoublyLinkedList very slow (fastdebug).

          • 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-8226691 Application times out writing JFR

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8226691 Application times out writing JFR

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8248485 Poor scalability in JfrCheckpointManager when using many threads after JDK-8242088

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8246770 Atomic::add() with 64 bit value fails to link on 32-bit platforms

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

          Enhancement - null JDK-8233705 Let artifact iteration running time be a function of incrementally tagged artifacts

          • P3 - Major loss of function.
          • Resolved

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              mgronlun Markus Grönlund
              mgronlun Markus Grönlund
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              Dates

                Created:
                Updated:
                Resolved: