RFR: 8351594: JFR: Rate-limited sampling of Java events [v8]

[Alan Bateman]

On Thu, 5 Jun 2025 09:41:10 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 two additional commits since the last revision:
> 
>  - Remove the mistakenly added file.
>  - Fix whitespace

src/jdk.jfr/share/conf/jfr/default.jfc line 845:

> 843:       <setting name="enabled" control="enable-exceptions">true</setting>
> 844:       <setting name="stackTrace">true</setting>
> 845:       <setting name="throttle" control="exceptions-throttle-rate">100/s</setting>

What was used to proposed 100/s as the default and 300/s in profile.jfc?

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PR Review Comment: https://git.openjdk.org/jdk/pull/25559#discussion_r2128442250