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  1. JDK
  2. JDK-8274615

Support relaxed atomic add for linux-aarch64

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Details

    • Enhancement
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • 18
    • 18
    • hotspot
    • None
    • b19
    • aarch64
    • linux

    Description

      Atomic::add and its variants are sometimes used in HotSpot C++ code with memory_order_relaxed, in places where an atomic RMW is needed but ordering is not. The linux-aarch64 platform currently ignores the memory order argument and always performs a conservative operation, possibly affecting performance. It should instead use a relaxed atomic add where requested. Other ordering variants for add operations aren't currently used, so don't need specialization.

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              kbarrett Kim Barrett
              kbarrett Kim Barrett
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                Updated:
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