RFR: 8333446: Add tests for hierarchical container support [v11]

[Severin Gehwolf]

On Wed, 11 Sep 2024 14:13:50 GMT, Severin Gehwolf <sgehwolf at openjdk.org> wrote:

>> Please review this PR which adds test support for systemd slices so that bugs like [JDK-8217338](https://bugs.openjdk.org/browse/JDK-8217338) can be verified. The added test, `SystemdMemoryAwarenessTest` currently passes on cgroups v1 and cgroups v2 (since [JDK-8322420](https://bugs.openjdk.org/browse/JDK-8322420) is fixed now).
>> 
>> I'm adding those tests in order to not regress another time.
>> 
>> Testing:
>> - [x] Container tests on Linux x86_64 cgroups v2 and Linux x86_64 cgroups v1.
>> - [x] New systemd test on cg v1 and cg v2 (passes).
>> - [x] GHA
>
> Severin Gehwolf has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 20 additional commits since the last revision:
> 
>  - Remove test from problem list as the bug is fixed
>  - Merge branch 'master' into jdk-8333446-systemd-slice-tests
>  - Improve reliability of cpu quota test
>  - Adapt JDK-8339148
>  - Merge branch 'master' into jdk-8333446-systemd-slice-tests
>  - Merge branch 'master' into jdk-8333446-systemd-slice-tests
>  - Fix comment of WB::host_cpus()
>  - Handle non-root + CGv2
>  - Add nested hierarchy to test framework
>  - Revert "Add root check for SystemdMemoryAwarenessTest.java"
>    
>    This reverts commit 7e8d9ed46815096ae8c4502f3320ebf5208438d5.
>  - ... and 10 more: https://git.openjdk.org/jdk/compare/18576f5a...88298b99

Thanks all for the re-reviews!

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

PR Comment: https://git.openjdk.org/jdk/pull/19530#issuecomment-2344148032