Count metrics with JMH

[Suburban Squirrel]

Thanks for help. I try to write own counters.


2014-03-27 10:54 GMT+02:00 Dmitry Chuyko <dmitry.chuyko at oracle.com>:

> Hi,
>
> Currently you can use a tricky @AuxCounters state: it can do some
> measurements between iterations or between invokations. There are some
> diagnostic options provided by runtime and particularly by HotSpot. E.g.
> com.sun.management.OperatingSystemMXBean (CPU), java.lang.management.MemoryMXBean
> (memory).
> Anyway, the result is quite imprecise except maybe the average CPU usage
> for invocation.
> It's better for now to use OS tools for HW counters (perf, sar), while
> it's awaited JMH functionality. The same for process memory stats. And some
> external tool is necessary for java memory info (sampling of mxbeans or JFR
> or whatever), it would be nice to have sampling memory profiler in JMH that
> can cover vm memory counters.
>
> Dmitry
>
>
> On 03/27/2014 11:45 AM, Aleksey Shipilev wrote:
>
>> On 03/25/2014 09:18 PM, ALex wrote:
>>
>>> I can see the number of requests for time, the average time of the test,
>>> but do not see the average amount of CPU usage and memory usage. This
>>> can be done by means of JMH?
>>>
>> There are profilers (see -prof), but their functionality is sub-par at
>> this point. Anyhow, reporting CPU/memory usage is OS-specific, and so
>> may be out of scope for JMH.
>>
>> -Aleksey.
>>
>>
>