RFR: 8317538: access to shared variable was removed [v2]

[Vladimir Ivanov]

> To fix scalability issue usage of the shared variable was removed. According to specjvm2008::crypto.rsa workload one thread performance drop for less than 1% while score for the 224 threads increased in ~2 times.
> Numbers for my run on 2 socket server with the Xeon 8480+ looks as:
> 1 thread runs: score drop from ~646 for original build to ~644 for patched build;
> 224 threads:  score increase from ~22553 for original to ~46633 for patched build.
> 
> The micro benchmark RSABench show no difference for the 1 thread run and report average ~2.4% improvement for the 224 threads.

Vladimir Ivanov has updated the pull request with a new target base due to a merge or a rebase.

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Changes: https://git.openjdk.org/jdk/pull/21573/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21573&range=01
  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21573.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21573/head:pull/21573

PR: https://git.openjdk.org/jdk/pull/21573