RFR: 8295156: G1: Improve constant other time calculation [v4]

[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 incrementally with one additional commit since the last revision:

  Botched merge

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10654/files
  - new: https://git.openjdk.org/jdk/pull/10654/files/aee4436e..92823188

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10654&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10654&range=02-03

  Stats: 12 lines in 1 file changed: 0 ins; 12 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