RFR: 8365611: Throttle any JFR event [v2]

[Markus Grönlund]

On Mon, 18 Aug 2025 13:41:51 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> This patch prepares the way to throttle any JFR event, not only the three events for which we hard-code throttlers. It also cleans up the throttler code and replaces the switch construct with a lookup table.
>> 
>> The patch does not yet enable throttling for any other event, since that may be a contentious move, and I would like for this patch to go in without too much fuss. So I did not make any new events "throttleble".
>> 
>> If it turns out to be non-contentious, I am fine with just enabling throttling capability for all events.
>
> Thomas Stuefe has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Markus Feedback

Looks good.

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Marked as reviewed by mgronlun (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26801#pullrequestreview-3128764724