RFR: 8334010: VM crashes with ObjectAlignmentInBytes > GCCardSizeInBytes [v2]

[Aleksey Shipilev]

On Tue, 15 Oct 2024 08:53:39 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> test/hotspot/jtreg/gc/TestObjectAlignmentCardSize.java line 43:
>> 
>>> 41:         "-XX:GCCardSizeInBytes=" + cardSize,
>>> 42:         "-Xmx32m",
>>> 43:         "-Xms32m",
>> 
>> I wonder if we are playing close to heap limits here, especially with large `ObjectAlignmentInBytes`. Do you have a feeling how much of the heap is used with `ObjectAlignmentInBytes=512`? Should this be `128m` instead, maybe?
>
> The gc+heap+exit memory usage shows <5m memory usage for all GCs (G1, Shenandoah, Serial, Parallel). We could go even lower to 16m easily.

Cool, nevermind then.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21515#discussion_r1800738320