RFR: 8338977: Parallel: Improve heap resizing heuristics [v3]

[Albert Mingkun Yang]

On Sun, 18 May 2025 15:36:03 GMT, Guoxiong Li <gli at openjdk.org> wrote:

>> Albert Mingkun Yang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:
>> 
>>  - review
>>  - Merge branch 'master' into pgc-size-policy
>>  - review
>>  - Merge branch 'master' into pgc-size-policy
>>  - pgc-size-policy
>
> src/hotspot/share/gc/parallel/psYoungGen.cpp line 268:
> 
>> 266:   size_t original_committed_size = virtual_space()->committed_size();
>> 267: 
>> 268:   while (true) {
> 
> The `while` statement only runs once. May we find a better way to refactor the code?

@lgxbslgx I did some restructuring based on some offline discussion -- hopefully, the new style is more readable.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25000#discussion_r2154053199