RFR: 8319373: Serial: Refactor dirty cards scanning during Young GC [v11]

[Kim Barrett]

On Mon, 20 Nov 2023 20:35:49 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Reading the new code directly is probably easier. The structure is quite similar to its counterpart in Parallel.
>> 
>> It's mostly perf-neutral, except when dirty cards are scarce. Using `card_scan.java` in [JDK-8310031](https://bugs.openjdk.org/browse/JDK-8310031), I observed ~40% reduction in young-gc pause time with `stride = 32 * 64`.
>
> 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 19 additional commits since the last revision:
> 
>  - Merge branch 'master' into s1-young-gc
>  - review
>  - review
>  - Merge branch 'master' into s1-young-gc
>  - review
>  - next-obj-card
>  - review
>  - Merge branch 'master' into s1-young-gc
>  - review
>  - Update src/hotspot/share/gc/serial/cardTableRS.cpp
>    
>    Co-authored-by: Thomas Schatzl <59967451+tschatzl at users.noreply.github.com>
>  - ... and 9 more: https://git.openjdk.org/jdk/compare/e77dc44a...aeae83cd

Changes requested by kbarrett (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/16492#pullrequestreview-1741306094