[9] RFR (L): 8015774: Add support for multiple code heaps

[Tobias Hartmann]

Hi,

could I get another review for this?

Latest webrev is: http://cr.openjdk.java.net/~thartmann/8015774/webrev.07/

Thanks,
Tobias

On 28.08.2014 14:09, Tobias Hartmann wrote:
> Hi,
>
> the segmented code cache JEP is now targeted. Please review the final 
> implementation before integration. The previous RFR, including a short 
> description, can be found here [1].
>
> JEP: https://bugs.openjdk.java.net/browse/JDK-8043304
> Bug: https://bugs.openjdk.java.net/browse/JDK-8015774
> Implementation: http://cr.openjdk.java.net/~thartmann/8015774/webrev.03/
> JDK-Test fix: 
> http://cr.openjdk.java.net/~thartmann/8015774_jdk_test/webrev.00/
>
> Changes since the last review:
> - Merged with other changes (for example, G1 class unloading changes [2])
> - Fixed some minor bugs that showed up during testing
> - Refactoring of 'NMethodIterator' and CodeCache implementation
> - Non-method CodeHeap size increased to 5 MB
> - Fallback solution: Store non-method code in the non-profiled code 
> heap if there is not enough space in the non-method code heap (see 
> 'CodeCache::allocate')
>
> Additional testing:
> - BigApps (Weblogic, Dacapo, runThese, Kitchensink)
> - Compiler and GC nightlies
> - jtreg tests
> - VM (NSK) Testbase
> - More performance testing (results attached to the bug)
>
> Thanks,
> Tobias
>
> [1] 
> http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2014-April/014098.html
> [2] https://bugs.openjdk.java.net/browse/JDK-8049421