RFR: 8308995: Update Network IO JFR events to be static mirror events [v4]

[Tim Prinzing]

On Tue, 22 Aug 2023 07:31:36 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> > https://bugs.openjdk.org/browse/JDK-8310979 - better exception handling https://bugs.openjdk.org/browse/JDK-8310978 - missing code paths for event generation https://bugs.openjdk.org/browse/JDK-8310994 - non-blocking, event for select ops
> 
> Do you have a sense yet on events when the channel is configured non-blocking? I realise the threshold is 20ms so they are probably not recorded today but I wonder if these code paths will eventually include `|| !blocking` or if it useful to record data on all socket read/write ops.

I think it's useful if trying to trace the calls (i.e. set to 0ms).  Apparently the security manager was being used for that by some.

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PR Comment: https://git.openjdk.org/jdk/pull/14342#issuecomment-1708657617