[lworld] RFR: 8364464: [lworld] GCs do not process flat arrays by chunks [v3]

[duke]

On Tue, 24 Feb 2026 10:13:34 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

>> Hi,
>> 
>> Please review this change to add Array Chunking for flatArrays with oops across the G1, Parallel, and Serial GCs
>> 
>> This update addresses the regression reported in [JDK-8373029](https://bugs.openjdk.org/browse/JDK-8373029).
>> 
>> Results after the change:
>> 
>> 
>> jdk/bin/java BigArray 80000000
>> 
>> real    0m35.790s
>> user    5m38.042s
>> sys     0m1.666s
>> 
>> 
>> 
>> jdk/bin/java --enable-preview BigArray 80000000
>> 
>> real    0m18.865s
>> user    2m57.155s
>> sys     0m1.799s
>> 
>> 
>> Test: Tier 1-2 with` --enable-preview`
>
> Ivan Walulya has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains eight additional commits since the last revision:
> 
>  - Merge remote-tracking branch 'upstream/lworld' into flatArraySplits_Serial_v1
>  - use uintptr_t
>  - Axel Review
>  - space
>  - Serial-GC changes
>  - Parallel Changes
>  - G1 Changes
>  - FlatArrayOop::oop_iterate_elements_range

@walulyai 
Your change (at version df248b32e422eeae2cf5ad78d05b76f5d1ecd213) is now ready to be sponsored by a Committer.

-------------

PR Comment: https://git.openjdk.org/valhalla/pull/2142#issuecomment-3957683183