RFR: JDK-8267371: Concurrent gtests take too long

[Stefan Karlsson]

On Wed, 19 May 2021 09:27:51 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> This looks good to me. I was kinda wondering the last time I looked at that test if 30 threads is excessive for the test as well.
>
>> This looks good to me. I was kinda wondering the last time I looked at that test if 30 threads is excessive for the test as well.
> 
> I'm honestly not sure why these tests are run concurrently; it looks to me like there is no VM internal synchronization involved which we could test, this is basically just a bunch of parallel mmap()s. I may miss something here.
> 
> Had been introduced (as jtreg-started whitebox test) with https://bugs.openjdk.java.net/browse/JDK-8027237. The associated RFR thread does not discuss the run parameters.
> 
> @stefank Stefan, do you think we could reduce the number of Threads for these tests too?

@tstuefe Do whatever you think is appropriate for this test. I'm not particularly fond of having stress tests in our gtest suite, and would have preferred to not have them here.

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PR: https://git.openjdk.java.net/jdk/pull/4110