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

[Johannes Bechberger]

On Fri, 30 May 2025 09:04:44 GMT, Daishi Tabata <dtabata at openjdk.org> wrote:

>> Johannes Bechberger has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix tiny issue
>
> 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.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2115488808