RFR: 8310994: Add JFR event for selection operations [v2]

[Daniel Fuchs]

On Wed, 13 Dec 2023 18:58:40 GMT, Tim Prinzing <tprinzing at openjdk.org> wrote:

>> src/java.base/share/classes/jdk/internal/event/SelectorSelectEvent.java line 41:
>> 
>>> 39: public class SelectorSelectEvent extends Event {
>>> 40: 
>>> 41:     public int selectionKeyCount;
>> 
>> I still believe we should record the timeout parameter in the event.
>
> Good point about the wakeup.  I'll add the field.

Thanks!

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PR Review Comment: https://git.openjdk.org/jdk/pull/16710#discussion_r1502695847