Integrated: 8358529: GenShen: Heuristics do not respond to changes in SoftMaxHeapSize

[Rui Li]

On Mon, 23 Jun 2025 21:42:36 GMT, Rui Li <duke at openjdk.org> wrote:

> Generational shenandoah currently doesn't pick up the changes of managed flag `SoftMaxHeapSize` when the app is running. This is because the value of `_soft_max_capacity` in `shenandoahGeneration` is never changed.
> 
> This change delegates the soft max heap size in `shenandoahGeneration` to `ShenandoahGenerationalHeap::heap()->soft_max_capacity()`, which does pick up the flag value changes.
> 
> Also, found `ShenandoahHeap:: initialize` uses `_num_regions * reg_size_bytes` rather than user input flag value. Updated to using actual flag value.

This pull request has now been integrated.

Changeset: fa32bfe1
Author:    Rui Li <ruiamzn at amazon.com>
Committer: William Kemper <wkemper at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/fa32bfe11300fdadb35f083037f6ab2a8985d210
Stats:     177 lines in 17 files changed: 78 ins; 32 del; 67 mod

8358529: GenShen: Heuristics do not respond to changes in SoftMaxHeapSize

Reviewed-by: wkemper

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PR: https://git.openjdk.org/jdk/pull/25943