RFR: 8342818: Implement JEP 509: JFR CPU-Time Profiling [v24]

[Johannes Bechberger]

On Fri, 30 May 2025 09:19:47 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

>> src/hotspot/share/jfr/metadata/metadata.xml line 975:
>> 
>>> 973:   </Event>
>>> 974: 
>>> 975:   <Event name="CPUTimeSampleLoss" category="Java Virtual Machine, Profiling" label="CPU Time Method Profiling Lost Samples" description="Records that the CPU time sampler lost samples"
>> 
>> I'm not a reviewer, but I just wanted to comment something I noticed.
>> The JEP document says CPUTimeSampleLos'**t**', but the implementation says CPUTimeSampleLos'**s**'. Which one is correct?
>> A sentence from the JEP document:
>> 
>> Another new event, `jdk.CPUTimeSampleLost`, is emitted when samples are lost ...
>
> Thanks for catching this mistake. I'll fix it this afternoon.

I fixed it by changing the JEP.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2118825477