RFR: 8339979: VirtualThreadSchedulerMXBeanTest.testReduceParallelism fails intermittently [v2]

[Kevin Walls]

On Thu, 3 Oct 2024 09:03:06 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> This is a test only change. VirtualThreadSchedulerMXBeanTest.testReduceParallelism can fail when getMountedVirtualThreadCount over estimates the number of mounted virtual threads.
>> 
>> The test is changed from using getMountedVirtualThreadCount to sample the result until it reads the expected value.
>> 
>> As part of the change, the awaitXXX supporting methods are refactored to take a predicate and the trace message.
>
> Alan Bateman has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Bring back Gte/Lte methods, reduces changes to one test

Hi, looks really good.

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Marked as reviewed by kevinw (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/21310#pullrequestreview-2345117198