RFR: 8327884: JFR view: Improve time display accuracy to milliseconds

[Long Yang]

On Tue, 12 Mar 2024 07:45:37 GMT, Long Yang <lyang at openjdk.org> wrote:

> Could I have a review of this patch for [8327884](https://bugs.openjdk.org/browse/JDK-8327884) ?
> 
> Now the time display accuracy is seconds. It's better if we can display milliseconds, especially when printing original events.
> This is a break change, consider this is a command line utility, it's acceptable.
> 
> Testing:
> test/jdk/jdk/jfr/tool/TestView.java
> test/jdk/jdk/jfr/jcmd/TestJcmdView.java
> 
> All passed.
> 
> Thanks

In most cases, accuracy to seconds is sufficient.
If it is a custom event, and the event start time accurate to milliseconds is of special significance to the developer, for this scenario, display to milliseconds is what developers expected.

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PR Comment: https://git.openjdk.org/jdk/pull/18219#issuecomment-1991623151