RFR: 8349213: G1: Clearing bitmaps during collection set merging not claimed by region [v4]

[Ivan Walulya]

On Sat, 8 Feb 2025 10:35:06 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>>   please review this change that makes (optional) bitmap clearing during merging remembered sets claim regions. Otherwise every thread will do the (currently little) work themselves over and over again.
>> 
>> Testing: tier1-3
>> 
>> Thanks,
>>   Thomas
>
> Thomas Schatzl has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains six commits:
> 
>  - * fix botched merge
>  - Merge branch 'master' into 8349213-bitmapclear-merging-not-claiming-regions
>  - Merge branch 'master' into 8349213-bitmapclear-merging-not-claiming-regions
>  - * ayang review
>  - * move commenty
>  - 8349213: G1: Clearing bitmaps during collection set merging not claimed by region
>    
>    Hi all,
>    
>      please review this change that makes (optional) bitmap clearing during merging remembered sets claim regions. Otherwise every thread will do the (currently little) work themselves over and over again.
>    
>    Testing: tier1-3
>    
>    Thanks,
>      Thomas

LGTM!

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

Marked as reviewed by iwalulya (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23419#pullrequestreview-2608121652