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  1. JDK
  2. JDK-8233189

[lworld] Flat array allocations are limited to 16 GB

    Details

    • Type: Bug
    • Status: Open
    • Priority: P4
    • Resolution: Unresolved
    • Affects Version/s: repo-valhalla
    • Fix Version/s: repo-valhalla
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
      gc

      Description

      Looking at our oop iterator code (at the core of our heap traversal for all GCs) [1]:

      "int oopDesc::oop_iterate_size(OopClosureType* cl, MemRegion mr)"

      It looks like hotspot has never allocated anything larger than 16 GB, i.e. MAX_VALUE(int32_t) * HeapWordSize (8 bytes).

      Look into removing this limitation for large flat arrays

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              • Assignee:
                dsimms David Simms
                Reporter:
                dsimms David Simms
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                Dates

                • Created:
                  Updated: