RFR: 8252108: Modify nsk/stress/stack tests to check page size

[Harold Seigel]

Hi Nick,

The changes look good.

Thanks for doing this.

Harold

On 8/24/2020 11:21 PM, Nick Gasson wrote:
> Hi,
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8252108
> Webrev: http://cr.openjdk.java.net/~ngasson/8252108/webrev.1/
>
> As discussed on the review thread for JDK-8251490 [1], it's better to
> have these tests enabled conditionally on 4K page size, rather than
> always disabled on AArch64, since the original issue was only present on
> AArch64 systems configured with 64K pages.
>
> Added a new "vm.pageSize" jtreg property that can be used in @requires.
>
> stack018.java intermittently times out with the increased -Xss448K so
> I've lowered this to -Xss220k and added @requires vm.pageSize ==
> 4096 (the original value -Xss200k fails with "Maximal recursion depth:
> 0" on AArch64 fastdebug build).
>
> [1] https://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2020-August/041299.html
>
> --
> Thanks,
> Nick