RFR: 8295267: Improve G1 scan to merge ratio calculation [v3]

[Thomas Schatzl]

On Thu, 13 Oct 2022 12:57:05 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Thomas Schatzl has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 15 commits:
>> 
>>  - Merge branch 'master' of https://git.openjdk.org/jdk into submit/8295267-improve-merge-to-scan-ratio
>>  - ayang review, merge_to_scan_ratio -> scan_to_merge_ratio
>>  - Improve naming, comments
>>  - Remove debug code
>>  - Fix test
>>  - initial version
>>  - ayang reviews
>>  - Initial version cost sample threshold
>>  - Initial version by walulyai
>>  - young gen revise trigger initial version
>>  - ... and 5 more: https://git.openjdk.org/jdk/compare/dfcd9d53...7fe993a9
>
> Some renaming suggestions, very subjective.
> 
> 
> merged_cards_from_log_buffers -> cards_in_log_buffers
> merged_cards_from_rs          -> cards_in_remset
> total_cards_merged            -> total_cards
> total_cards_scanned           -> scanned_cards

Thanks @albertnetymk @walulyai for your reviews

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

PR: https://git.openjdk.org/jdk/pull/10694