RFR: 8276887: G1: Move precleaning to Concurrent Mark From Roots subphase [v3]

Thu Nov 11 14:22:43 UTC 2021

On Wed, 10 Nov 2021 21:09:10 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Simple change of moving the "Preclean" subphase into "Mark from roots" subphase so that precleaning becomes parallel automatically. Evaluation using a contrived java program shows that multiple GC threads do precleaning. More detailed testing results are available in the JBS ticket.
>> 
>> Test: hotspot_gc
>
> Albert Mingkun Yang has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - review
>  - Revert "worker_id"
>    
>    This reverts commit 0841db5c5c2b39372058b6ba0d8027aae3716669.

Approved, suggested improvements to logging will be addressed separately.

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Marked as reviewed by sjohanss (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6327