[9] RFR (S): 8068183: Add isTieredSupported method to c.o.j.t.Platforms

[Filipp Zhinkin]

Igor, thank you for review.

Regards,
Filipp.

On 12/24/2014 08:33 PM, Igor Ignatyev wrote:
> Filipp,
>
> looks good to me.
>
> Thanks
> Igor
>
> On 12/24/2014 05:47 PM, Filipp Zhinkin wrote:
>> On 12/24/2014 06:22 PM, Filipp Zhinkin wrote:
>>> Hi all,
>>>
>>> please review a new c.o.j.t.Platform's method "isTieredSupported"
>>> which is aimed to report whether or not JVM supports tiered compilation
>>> disregard to TieredCompilation flag's value.
>>>
>>> Such functionality is required for Segmented Code Cache CLI tests [1]
>>> and it would be useful in other cases too ([2] for instance).
>>>
>>> In order to check if tiered compilation is supported we simply look to
>>> "sun.management.compiler"property's valuewhich will contain
>>> "Tiered Compilers" substring only when tiered compilation is supported
>>> [3].
>>>
>>> Bug id: https://bugs.openjdk.java.net/browse/JDK-8068183
>>> Webrev: http://cr.openjdk.java.net/~fzhinkin/8068183/webrev.00/
>>> Testing: manual on localmachine using both client & server JVMs.
>> And using embedded VM too.
>>>
>>> Thanks,
>>> Filipp.
>>>
>>> [1]
>>> http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2014-December/016717.html 
>>>
>>>
>>> [2] https://bugs.openjdk.java.net/browse/JDK-8067823
>>> [3]
>>> http://hg.openjdk.java.net/jdk9/jdk9/hotspot/file/7f062b70a344/src/share/vm/prims/jvm.cpp#l366 
>>>
>>>
>>