RFR: 8326205: Grouping frequently called C2 nmethods in CodeCache [v6]

[Evgeny Astigeevich]

On Sat, 17 Jan 2026 20:36:34 GMT, Jan Kratochvil <jkratochvil at openjdk.org> wrote:

> I see a FAIL for `test/jdk/jdk/jfr/event/compiler/TestCodeCacheFull.java` on linux64 fastdebug:
> 
> ```
> Error occurred during initialization of VM
> HotCodeHeapSize requires HotCodeHeap enabled
> ```
> 
> But GHA does not report it.

Thank you, @jankratochvil. We will take a look.

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PR Comment: https://git.openjdk.org/jdk/pull/27858#issuecomment-3770292456