RFR: 7903554: JMH: add Threads.HALF_MAX constant [v3]

[Aleksey Shipilev]

On Fri, 8 Sep 2023 19:57:48 GMT, Sergey Kuksenko <skuksenko at openjdk.org> wrote:

>> add Threads.HALF_MAX constant equals to "Runtime.getRuntime().availableProcessors()/2"
>
> Sergey Kuksenko has updated the pull request incrementally with one additional commit since the last revision:
> 
>   fix test

The code change looks good. But what is the use case for this?

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PR Review: https://git.openjdk.org/jmh/pull/118#pullrequestreview-1619497357