JDK-8151775 : aarch64: add support for 8.1 LSE atomic operations
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 9
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: linux
  • CPU: aarch64
  • Submitted: 2016-03-13
  • Updated: 2021-02-01
  • Resolved: 2016-03-30
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JDK 9 Other
9 b115Fixed openjdk8u292Fixed
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Description
This issue proposes the addition of support for 8.1 LSE atomic operations.

There are 2 atomic operations which may be useful

ldadd which atomically adds a value to memory
swp which atomically swaps a value into memory

These new instructions offer performance advantages over the existing implementations using exclusive regions.