RFR: 8338440: Parallel: Improve fragmentation mitigation in Full GC [v4]

[Albert Mingkun Yang]

On Mon, 26 Aug 2024 15:24:54 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

>> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   review
>
> src/hotspot/share/gc/parallel/psParallelCompact.cpp line 129:
> 
>> 127: ParallelCompactData::RegionData::dc_completed = 0xcU << dc_shift;
>> 128: 
>> 129: bool ParallelCompactData::RegionData::is_clear() {
> 
> Do we call this anywhere outside #ifdef ASSERT?

No, it's only for assert. The name seems useful for non-verification, so I left it there.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20590#discussion_r1731551711