RFR: 8318608: Enable parallelism in vmTestbase/nsk/stress/threads tests

[Leonid Mesnik]

On Mon, 23 Oct 2023 22:30:42 GMT, Elif Aslan <duke at openjdk.org> wrote:

> The commit includes changes to unblock parallelism for more `hotspot:tier4` tests. in `test/hotspot/jtreg/vmTestbase/nsk/stress/thread `tests.
> 
> Below are the before and after test run comparisons:
> 
> Before:
>  time,count
>    15,    1
>    33,    1
>    48,    1
>    66,    1
>    72,    1
>    77,    1
> 
> Mean                51.83s
> Standard deviation  22.24s
> Total elapsed time 1m 17s
> 
> After:
>  time,count
>    19,    1
>    23,    1
>    29,    1
>    34,    1
>    48,    1
>    53,    1
> 
> Mean                34.33s
> Standard deviation  12.43s
> Total elapsed time 0m 53s

Looks good. Testing passed.

-------------

Marked as reviewed by lmesnik (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/16327#pullrequestreview-1693754613