Question/Extension proposal: references to off-heap objects and support for multiple heaps

[Leo Romanoff]

Hi Kris,

Thanks a lot for this link about GCIH and other JVM extensions done at
Taobao. Very interesting! 
The GCIH use-cases are almost identical to what I had in mind.
 

Krystal Mok wrote:
> 
> We made deep modifications to the HotSpot VM to implement the features. As
> you stated, it's unlikely to implement such feature without modifying the
> internals of the VM, at least with the current standard APIs.
> 

Very interesting. Is any general (or even better - detailed) information
about those deep modifications available anywhere? It would be interesting
to better understand which parts of the HotSpot are affected or impacted by
such an extension and to which extent.

Thanks again,
  Leo

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