RFR: 8316813: NMT: Using WhiteBox API, virtual memory tracking should also be stressed in JMH tests [v4]

[Gerard Ziemski]

On Tue, 13 Feb 2024 13:56:21 GMT, Afshin Zafari <azafari at openjdk.org> wrote:

>> After WhiteBox (`wb.jar`) is added to the lib-test, it is possible to use it in Java benchmarks. This PR uses WhiteBox to access and call directly NMT API and measure their performance in stressed circumstances.
>
> Afshin Zafari has updated the pull request incrementally with one additional commit since the last revision:
> 
>   rename missed variables from previous commit.

Marked as reviewed by gziemski (Committer).

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PR Review: https://git.openjdk.org/jdk/pull/17582#pullrequestreview-1880645841