RFR: 8351594: JFR: Rate-limited sampling of Java events [v9]

[Alan Bateman]

On Thu, 5 Jun 2025 10:10:41 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

>> Could I have review of an enhancement that adds rate-limited sampling to Java events, including five events in the JDK (SocketRead, SocketWrite, FileRead, FileWrite, and JavaExceptionThrow).
>> 
>> Testing: test/jdk/jdk/jfr
>> 
>> Thanks
>> Erik
>
> Erik Gahlin has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Move the timestamp to before the try block, change bytes to bytesWritten and remove unnecessary code

src/java.base/share/classes/java/lang/Throwable.java line 124:

> 122:      * exceptions should be traced by JFR.
> 123:      */
> 124:     static boolean jfrTracing;

Are you sure this is okay?

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PR Review Comment: https://git.openjdk.org/jdk/pull/25559#discussion_r2128525269