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

[Severin Gehwolf]

On Thu, 11 Jul 2024 14:26:23 GMT, Jan Kratochvil <jkratochvil 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`).

Well yes, because the limit isn't properly detected (needs a JVM change that does that; imo https://github.com/openjdk/jdk/pull/17198).

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PR Comment: https://git.openjdk.org/jdk/pull/19530#issuecomment-2223109654