RFR: Implement JEP 509: JFR CPU-Time Profiling [v45]

[Zhengyu Gu]

On Mon, 5 May 2025 13:27:26 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

>> You certainly can use pre-allocated array as allocation pool, with additional `next` field. However, the challenge is how to deal with `ABA` problem (or does it have `ABA` problem?). I am not sure you can use `GlobalCounter` inside signal handlers.
>
> This is why I replaced it with a queue that doesn't have these problems.

Which queue implementation you were referring?

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PR Review Comment: https://git.openjdk.org/jdk/pull/20752#discussion_r2073459705