RFR: 8342818: Implement JEP 509: JFR CPU-Time Profiling [v26]

[Johannes Bechberger]

On Sun, 1 Jun 2025 13:01:23 GMT, Markus Grönlund <mgronlun at openjdk.org> wrote:

>> Johannes Bechberger has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Refactoring
>>  - Remove convoluted native trace logic
>
> src/hotspot/share/jfr/periodic/sampling/jfrCPUTimeThreadSampler.cpp line 200:
> 
>> 198:   void sample_thread(JfrSampleRequest& request, void* ucontext, JavaThread* jt, JfrThreadLocal* tl);
>> 199: 
>> 200:   // sample all threads that are in native state (and requested to be sampled)
> 
> We are not really "sampling", but processing their queues, no?

You're correct.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2120450563