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

[Johannes Bechberger]

On Sun, 1 Jun 2025 15:32:08 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 536:
> 
>> 534: }
>> 535: 
>> 536: volatile size_t count__ = 0;
> 
> unused?

Yes.

> src/hotspot/share/jfr/periodic/sampling/jfrCPUTimeThreadSampler.cpp line 586:
> 
>> 584:     JfrCPUTimeThreadSampling::trigger_async_processing_of_cpu_time_jfr_requests();
>> 585:   } else {
>> 586:     tl->set_do_async_processing_of_cpu_time_jfr_requests(false);
> 
> Was it true before and needed a reset?

I could check this before setting

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PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2119260755
PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2119261558