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  1. JDK
  2. JDK-8269128

C2: Avoid redundant memory barriers in Unsafe.copyMemory0 intrinsic

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    • Enhancement
    • Resolution: Duplicate
    • P4
    • None
    • 17
    • hotspot

    Description

      Unsafe::copyMemory0 intrinsic unconditionally inserts barriers arounds the call. It is conservative and barriers can be avoided in some cases (similar to what is done for scalar unsafe accesses; e.g., copying between on-heap arrays and off-heap is one of such cases).

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              vlivanov Vladimir Ivanov
              vlivanov Vladimir Ivanov
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                Updated:
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