[jdk25u] RFR: 8343340: Swapping checking do not work for MetricsMemoryTester failcount [v2]

[SendaoYan]

> Hi all,
> 
> This pull request contains a backport of commit [7e068cc8](https://github.com/openjdk/jdk/commit/7e068cc8d572e61cf2f4203f66fe0175a541209d) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by SendaoYan on 20 Oct 2025 and was reviewed by Severin Gehwolf.
> 
> Thanks!

SendaoYan 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. The pull request contains two additional commits since the last revision:

 - Merge branch 'openjdk:master' into backport-sendaoYan-7e068cc8-master
 - Backport 7e068cc8d572e61cf2f4203f66fe0175a541209d

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

Changes:
  - all: https://git.openjdk.org/jdk25u/pull/325/files
  - new: https://git.openjdk.org/jdk25u/pull/325/files/48818bca..4036d715

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk25u&pr=325&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk25u&pr=325&range=00-01

  Stats: 340 lines in 26 files changed: 272 ins; 11 del; 57 mod
  Patch: https://git.openjdk.org/jdk25u/pull/325.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/325/head:pull/325

PR: https://git.openjdk.org/jdk25u/pull/325