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  1. JDK
  2. JDK-8195108

Automate or provide dynamic thread registration for SMR

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Duplicate
    • Affects Version/s: 10
    • Fix Version/s: None
    • Component/s: hotspot
    • Labels:

      Description

      Attempting to transition to using SMR techniques ran into the following problem:

      the _threads array inside my ThreadsListHandle stack local variable was destroyed / removed after removing the Threads_lock, which was covering the scope of using the ThreadsListHandle.

      It seems that it is not enough to take a SMR ThreadsListHandle for thread list interaction, but you also need to be registered as a thread that SMR will inspect when doing updates to the threads list (which it does under the exclusive Threads_lock).

      Currently, this “registration” is done using Threads::do(), which means this is a static registration of threads to scan for SMR, that is, it is not a dynamic one.

      We should figure out some means of providing automatic (ideal) and/or dynamic (ok) SMR thread registration.

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              • Assignee:
                dcubed Daniel Daugherty
                Reporter:
                mgronlun Markus Grönlund
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                • Created:
                  Updated:
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