RFR: 8327387: G1: Refactor region liveness processing after completion of concurrent marking [v3]

[Albert Mingkun Yang]

On Fri, 8 Mar 2024 09:49:06 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> The diff is not quite easy to follow. Instead, I'd recommend to read the new code directly, and the entry-point (and the gist) is in `G1OnRegionClosure::do_heap_region`.
>> 
>> While running BigRamTester, h2, and specjbb2015-fixed, a slight reduction in subphase time (approximately 0.01ms) was observed. However, it's important to note that these subphases are already quite brief in baseline.
>> 
>> Test: tier1-6
>
> Albert Mingkun Yang 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 five additional commits since the last revision:
> 
>  - Merge branch 'master' into g1-merge-remark
>  - review
>  - review
>  - Merge branch 'master' into g1-merge-remark
>  - g1-merge-remark

Thanks for review.

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PR Comment: https://git.openjdk.org/jdk/pull/18127#issuecomment-1987991028