RFR: 8333446: Add tests for hierarchical container support [v3]

[Jan Kratochvil]

On Thu, 11 Jul 2024 09:23:58 GMT, Severin Gehwolf <sgehwolf at openjdk.org> wrote:

> > ```
> > * `CPUQuota` (changed it to `AllowedCPUs`) does not work for me - it properly distributes the load but JDK still sees all available CPU cores (4 of my VM).
> > ```
> 
> Could you elaborate on that? What does not work?

In the log there is (`/proc/cpuinfo` has 4 entries on this system):

[0.139s][trace][os,container] OSContainer::active_processor_count: 4 

and therefore it fails with:
```    
java.lang.RuntimeException: 'OSContainer::active_processor_count: 2' missing from stdout/stderr
        at jdk.test.lib.process.OutputAnalyzer.shouldContain(OutputAnalyzer.java:252)
        at SystemdMemoryAwarenessTest.testHelloSystemd(SystemdMemoryAwarenessTest.java:58)
        at SystemdMemoryAwarenessTest.main(SystemdMemoryAwarenessTest.java:43)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
        at java.base/java.lang.Thread.run(Thread.java:1575)

It is on Fedora 40 x86_64 (`systemd-255.8-1.fc40.x86_64`).

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PR Comment: https://git.openjdk.org/jdk/pull/19530#issuecomment-2223083324