RFR: 8295156: G1: Improve constant other time calculation [v2]

[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 incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10654/files
  - new: https://git.openjdk.org/jdk/pull/10654/files/f4b3b5ab..f4b3b5ab

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10654&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10654&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 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