JEP proposed to target JDK 24: 475: Late Barrier Expansion for G1

Mark Reinhold mark.reinhold at oracle.com
Wed Sep 25 13:27:26 UTC 2024


The following JEP is proposed to target JDK 24:

  475: Late Barrier Expansion for G1
       https://openjdk.org/jeps/475

  Summary: Simplify the implementation of the G1 garbage collector's
  barriers, which record information about application memory accesses,
  by shifting their expansion from early in the C2 JIT's compilation
  pipeline to later.

Feedback on this proposal from JDK Project Committers and Reviewers [1]
is more than welcome, as are reasoned objections.  If no such objections
are raised by 16:00 UTC on Wednesday, 2 October, or if they’re raised
and then satisfactorily answered, then per the JEP 2.0 process proposal
[2] I’ll target this JEP to JDK 24.

- Mark


[1] https://openjdk.org/census#jdk
[2] https://cr.openjdk.java.net/~mr/jep/jep-2.0-02.html


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