RFR: 8315149: Add hsperf counters for CPU time of internal GC threads [v30]

[Aleksey Shipilev]

On Fri, 13 Oct 2023 01:38:13 GMT, Jonathan Joo <jjoo at openjdk.org> wrote:

>> 8315149: Add hsperf counters for CPU time of internal GC threads
>
> Jonathan Joo has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add call to publish in parallel gc and update counter names

FYI, 64-bit atomics fallbacks for 32-bit arches are developing here: #16252.

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PR Comment: https://git.openjdk.org/jdk/pull/15082#issuecomment-1769145084