RFR: 8310994: Add JFR event for selection operations

[Alan Bateman]

On Wed, 22 Nov 2023 12:08:08 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

> It could also be interesting to provide the `timeout` that was given to the selection operation.

I've tried to work through issues, esp. around selector spinning, and being able to distinguish select from selectNow is important for all of them, so yes, the timeout is needed or else no emit when the timeout == 0 as that's the case you have to filter out when troubleshooting.

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PR Review Comment: https://git.openjdk.org/jdk/pull/16710#discussion_r1419979779