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

[Goetz Lindenmaier]

On Sat, 4 Dec 2021 17:35:01 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit e49e5b5a from the openjdk/jdk repository.
> 
> The commit being backported was authored by Sergey Bylokhov on 28 Sep 2021 and was reviewed by Phil Race.
> 
> The new tests are passed. See more details [here](https://github.com/openjdk/jdk/pull/5671).
> 
> Thanks!

Please redo this PR against jdk17u-dev.

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PR: https://git.openjdk.java.net/jdk17u/pull/318