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

[Filipp Zhinkin]

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