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  1. JDK
  2. JDK-8218922

SA: Enable best-effort implementation of live regions iteration for ZGC

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Details

    • Enhancement
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • None
    • 13
    • hotspot
    • b09

    Description

      The SA has functionally that relies on live heap region information from the GCs. This is problematic when dead objects are left in the heap, and their classes have been unloaded.

      Because of this ZGC has so far not implemented this feature. However, we could provide a best-effort implementation of this that works if class unloading is turned off, but would not report all regions if dead objects with dead classes are encountered.

      Maybe this is enough to enable a bit more SA debugging capabilities when running with ZGC.

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          duplicates

          Enhancement - null JDK-8207843 SA: Add support for Object Histogram with ZGC

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8221534 Incorrect copyright header in src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZPageTableEntry.java

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

          Enhancement - null JDK-8219003 SA: Refactor live regions iteration in preparation for JDK-8218922

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

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              stefank Stefan Karlsson
              stefank Stefan Karlsson
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              Dates

                Created:
                Updated:
                Resolved: