RFR: 8295156: G1: Improve constant other time calculation [v3]

[Thomas Schatzl]

> Hi all,
> 
>   can I have reviews for this change from Ivan that improves current constant other time calculation, allowing for better predictions?
> 
> After many years of changes to the garbage collection algorithm, moving around phases, the current calculation of constant other time became just wrong. This change fixes this.
> 
> Depends on PR#10652, please review that one first if not done yet.
> 
> Testing: Testing: gha, local testing, tier1-5 with other changes in this patch series, perf testing with other changes in this patch series
> 
> Thanks,
>   Thomas

Thomas Schatzl has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains eight commits:

 - Merge branch 'master' of https://git.openjdk.org/jdk into submit/8295156-improve-constant-other-prediction
 - Initial version by walulyai
 - young gen revise trigger initial version
 - initial version
 - initial commit
 - initial version
 - initial version
 - initial version

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Changes: https://git.openjdk.org/jdk/pull/10654/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10654&range=02
  Stats: 17 lines in 3 files changed: 15 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/10654.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10654/head:pull/10654

PR: https://git.openjdk.org/jdk/pull/10654