jmx-dev RFR: 8269851: OperatingSystemMXBean getProcessCpuLoad reports Process CPU usage

[xpbob]

On Wed, 7 Jul 2021 01:11:00 GMT, xpbob <github.com+7837910+xpbob at openjdk.org> wrote:

> …ocess cpu usage inside a container

getProcessCpuLoad return jvm cpu load。
8 core in machine, set 1 core for container。
Run same program, the getProcessCpuLoad return the same value。

expected 
same program run in machine,value 0.12
run in  1 core container,value 0.99

ProcessCpuLoad  is associative container setting

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PR: https://git.openjdk.java.net/jdk/pull/4700