RFR: 8298173: GarbageCollectionNotificationContentTest test failed: no decrease in Eden usage

[Daniel D. Daugherty]

On Thu, 8 Dec 2022 11:55:20 GMT, Kevin Walls <kevinw at openjdk.org> wrote:

>> This bug appears to be a regression caused by the fix for:
>> 
>> [JDK-8297247](https://bugs.openjdk.org/browse/JDK-8297247) Add GarbageCollectorMXBean for Remark and Cleanup pause time in G1
>> 
>> so I've bumped the priority from P4 -> P2 since it appears to be a regression. I've
>> also retargeted the bug from '21' -> '20'.
>
> Thanks for the reviews, thanks @dcubed-ojdk  for the pointer to the other change - this did not start failing by coincidence, there are new notifications happening.
> 
> It is hard to reproduce the failure, and they are mostly on linux aarch64, but I've seen one locally on linux x64. 
>  The failures show an event where Eden size does not change: the test says that eden before size <= after size is a failure.
> 
> I cannot reproduce the problem with this change in mach5 or locally, in many runs.
> 
> Yes, the cleanup changes are distracting, but "count"?  That should be more meaningful. 8-)
> 
> Integrating now to be in jdk20.

@kevinjwalls - Thanks for getting the fix integrated into JDK20.
The CI will be less noisy today!

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PR: https://git.openjdk.org/jdk/pull/11572