JDK-8030957 - AIX: Implement OperatingSystemMXBean.getSystemCpuLoad() and .getProcessCpuLoad() on AIX

[suchismith1993]

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• JDK-8030957: AIX: Implement OperatingSystemMXBean.getSystemCpuLoad() and .getProcessCpuLoad() on AIX (Enhancement - P4)

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[MBaesken]

I noticed that we check for retval < 0 in os_perf_aix.cpp, should we align this in some way ?

[MBaesken]

Are you sure the perfstat functionality is always available ?
In HS we do dynamic resolution (see e.g. os_perf_aix.cpp), but maybe that was needed long time ago and is not really needed any more? But please check this .

[suchismith1993]

Are you sure the perfstat functionality is always available ? In HS we do dynamic resolution (see e.g. os_perf_aix.cpp), but maybe that was needed long time ago and is not really needed any more? But please check this .

I tried with a standalone program and did not face any issues.

[suchismith1993]

@MBaesken would it be possible for you to try this patch once to see if the load values are realistic / accurate ?
Else if you can provide some use case that I can try.

[MBaesken]

Are you sure the perfstat functionality is always available ? In HS we do dynamic resolution (see e.g. os_perf_aix.cpp), but maybe that was needed long time ago and is not really needed any more? But please check this .

I tried with a standalone program and did not face any issues.

I was more thinking about different AIX machines setups/OS levels/installations. Is the perfstat functionality always there 'these days' ?

[MBaesken]

would it be possible for you to try this patch once to see if the load values are realistic / accurate ?

Not 100% sure how, should we compare with values provided by other tools (system tools etc.) ?