RFR: 8315149: Add hsperf counters for CPU time of internal GC threads [v53]

[Stefan Johansson]

On Sat, 2 Dec 2023 01:22:33 GMT, Jonathan Joo <jjoo at openjdk.org> wrote:

>> I still think that a total counter is useful and I'd appreciate if you can keep it. To second what @caoman said before, it is GC agnostic, easy to use even for non GC experts and future proof with regards to implementation changes in the GCs. Please keep it.
>
> Put the closure in a scope, I think that should address the concern.

Yes, scoping it will work.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15082#discussion_r1413591437