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  1. JDK
  2. JDK-8014233

java.lang.Thread should have @Contended on TLR fields

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 8
    • None
    • core-libs
    • b98
    • Not verified

    Description

      After ThreadLocalRandom state was merged into Thread, we now have to deal with the false sharing induced by heavily-updated fields in Thread. TLR was padded before, and it should make sense to make Thread bear @Contended annotation to isolate its fields in the same manner.

      See the discussion http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-June/018090.html for steps to reproduce.

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          relates to

          Enhancement - null JDK-8005926 (thread) Merge ThreadLocalRandom state into java.lang.Thread

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

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              shade Aleksey Shipilev
              shade Aleksey Shipilev
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                Created:
                Updated:
                Resolved: