RFR: 8265104: CpuLoad and SystemCpuLoad in OperatingSystem MXBean returns -1.0 [v2]

[Severin Gehwolf]

On Tue, 13 Apr 2021 06:55:20 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

>> I got -1.0 from both CpuLoad and SystemCpuLoad in OperatingSystem MXBean when I run the application on Fedora 33 x64 which is installed cgroups V2.
>> 
>> ![jconsole-cpuload](https://user-images.githubusercontent.com/7421132/114485721-6372a180-9c47-11eb-81d9-568324cba336.png)
>> 
>> I do not run the application in the container, nor do not run with resource limitation on cgroups, so JMX should report CPU load on host value in this case.
>
> Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Return host CPU load directly from getCpuLoad()

This looks reasonable to me.

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Marked as reviewed by sgehwolf (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/3447