RFR: 8365880: Shenandoah: Unify memory usage accounting in ShenandoahFreeSet [v3]

[Kelvin Nilsen]

On Fri, 12 Sep 2025 17:37:01 GMT, Kelvin Nilsen <kdnilsen at openjdk.org> wrote:

>> src/hotspot/share/gc/shenandoah/heuristics/shenandoahAdaptiveHeuristics.cpp line 372:
>> 
>>> 370:       _last_sample_time = now;
>>> 371:       _last_sample_value = allocated;
>>> 372:     }
>> 
>> This was a bug.  If we don't update the average, we should not restart the time until next sample and we should not overwrite the value of _last_sample_value.
>
> Let's split this out into a different PR.

I reverted these changes, addressed this issue in separate PR https://github.com/openjdk/jdk/pull/27398, and merged from mainline.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26867#discussion_r2386423882