RFR: 8289764: gc/lock tests failed with "OutOfMemoryError: Java heap space: failed reallocation of scalar replaced objects" [v2]

[Leonid Mesnik]

On Mon, 8 Aug 2022 15:49:51 GMT, Ramkumar Sunderbabu <rsunderbabu at openjdk.org> wrote:

>> ough, yes, I mean that loop was completed only once, so we have only one iteration per test, while the goal is to run a lot of lock/GC/unlock iterations.
>
> Loop won't run for just once. It will run for the duration of the test. If the test is configured to run, say, 2 mins, stresser.continueExecution() will be false after 2 mins.

exactly, however, the whole 'engageGC' method will be executed only once and always work in this loop.
So the combination of lock/engageGC()/unlock is executed only once and the test spends all it's time in 'engageGC' which is not the stress for lock/unlock and moreover could cause OOME if lock/unlock really locks GC.

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PR: https://git.openjdk.org/jdk/pull/9658