RFR: 8342818: Implement JEP 509: JFR CPU-Time Profiling [v29]
Markus Grönlund
mgronlun at openjdk.org
Mon Jun 2 15:22:03 UTC 2025
On Mon, 2 Jun 2025 13:50:49 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 one additional commit since the last revision:
>
> Fix bug related to async stack walking
src/hotspot/share/jfr/periodic/sampling/jfrThreadSampling.cpp line 250:
> 248: break;
> 249: } else {
> 250: biased = false;
Not correct. There is a top_frame = *current - >biased = true below.
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2121482514
More information about the hotspot-dev
mailing list