RFR: JDK-8305506: Add support for fractional values of SafepointTimeoutDelay [v5]

[David Holmes]

On Fri, 5 May 2023 11:07:26 GMT, Wojciech Kudla <duke at openjdk.org> wrote:

>> As stated in https://bugs.openjdk.org/browse/JDK-8305506 this change replaces SafepointTimeoutDelay as integer value with a floating point type to support sub-millisecond SafepointTimeout thresholds.
>> This is immensely useful for investigating time-to-safepoint issues in low latency space.
>
> Wojciech Kudla has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Adjusted test case to verify integer value

Looks good. Thanks

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Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13373#pullrequestreview-1416205702