RFR: 8342382: Implement JEP 522: G1 GC: Improve Throughput by Reducing Synchronization [v54]

[Thomas Schatzl]

On Mon, 8 Sep 2025 09:47:10 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   * sort includes
>
> We would like to finally wrap up this PR as we are about to Propose To Target [JEP 522](openjdk.org/jeps/522) to JDK 26, so it would be nice to get re-reviews from the reviewers that already signed it off if you think it is useful.
> 
> Nothing much changed actually for months now, particularly in the area of target-specific support, but maybe one more rerun on the more exotic platforms (AIX/PPC, RISC-V) just in case would be fine.
> 
> Internally it went through Oracle's tier1-8 without any issue again (that is revision https://github.com/openjdk/jdk/pull/23739/commits/b3873d66cd43518d5dc71e060fc52a13372dbfa5, but the changes since then were very cosmetic).

> Hi @tschatzl : I witnessed some conflicts when applying this on latest jdk head. Maybe you can do another merge and rebase? I can help rerun the tests on RISC-V. (Note that there is one failing test: `test/hotspot/jtreg/gtest/GTestWrapper.java` if I use the same base as in your repo, and that issue has been resolved by [JDK-8366897](https://bugs.openjdk.org/browse/JDK-8366897))

Merged. Thanks for another round of testing (also to @TheRealMDoerr).

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PR Comment: https://git.openjdk.org/jdk/pull/23739#issuecomment-3273765120