[jdk17u-dev] RFR: 8273972: Multi-core choke point in CMM engine (LCMSTransform.doTransform)

[Sergey Bylokhov]

Hi all,
This pull request contains a backport of commit [e49e5b5a](https://github.com/openjdk/jdk/commit/e49e5b5a7ed9e493380fb73100057898c707b31b) from the [openjdk/jdk](https://git.openjdk.java.net/jdk) repository.
The commit being backported was authored by Sergey Bylokhov on 28 Sep 2021 and was reviewed by Phil Race.

See more details [here](https://github.com/openjdk/jdk/pull/5671)

Thanks!

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Commit messages:
 - Backport e49e5b5a7ed9e493380fb73100057898c707b31b

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/47/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=47&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273972
  Stats: 358 lines in 5 files changed: 317 ins; 25 del; 16 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/47.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/47/head:pull/47

PR: https://git.openjdk.java.net/jdk17u-dev/pull/47