RFR: 8342818: Implement JEP 509: JFR CPU-Time Profiling [v27]
Markus Grönlund
mgronlun at openjdk.org
Mon Jun 2 11:51:27 UTC 2025
On Mon, 2 Jun 2025 11:32:27 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:
>> This is the code for the [JEP 509: CPU Time based profiling for JFR](https://openjdk.org/jeps/509).
>>
>> Currently tested using [this test suite](https://github.com/parttimenerd/basic-profiler-tests). This runs profiles the [Renaissance](https://renaissance.dev/) benchmark with
>> - ... different heap sizes
>> - ... different GCs
>> - ... different samplers (the standard JFR and the new CPU Time Sampler and both)
>> - ... different JFR recording durations
>> - ... different chunk-sizes
>
> Johannes Bechberger has updated the pull request incrementally with two additional commits since the last revision:
>
> - Tiny fixes
> - Minor changes
src/hotspot/share/jfr/periodic/sampling/jfrCPUTimeThreadSampler.cpp line 35:
> 33:
> 34: #include "jfr/recorder/jfrRecorder.hpp"
> 35: #include "jfr/recorder/service/jfrRecorderService.hpp"
The two includes above are not needed.
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2120890097
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