[jdk17u-dev] RFR: 8315692: Parallelize gc/stress/TestStressRSetCoarsening.java test [v3]

[Soumadipta Roy]

> The commit includes backporting a564d436c722f14041231158f21c4ad3a2f6a3a5 from upstream tp jdk17u-dev. The hunks were applied cleanly. Below are the results upon running in AL2_x86_64:
> 
> * before_release: 1564.96s user 70.36s system 593% cpu 4:35.47 total
> * before_debug: 9727.35s user 5080.61s system 2332% cpu 10:34.74 total
> * after_release: 1662.45s user 57.04s system 1204% cpu 2:22.76 total
> * after_debug: 11742.37s user 2687.01s system 3985% cpu 6:02.06 total

Soumadipta Roy has updated the pull request incrementally with one additional commit since the last revision:

  Rever commit 925ee25e as backport is clean.

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

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1985/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1985/files/925ee25e..66d442bf

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1985&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1985&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1985.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1985/head:pull/1985

PR: https://git.openjdk.org/jdk17u-dev/pull/1985