RFR (XL): 8152664 - Support non-continuous CodeBlobs in HotSpot

[Andrew Dinn]

On 07/04/16 18:28, Christian Thalinger wrote:
> 
>> On Apr 7, 2016, at 2:25 AM, Andrew Dinn <adinn at redhat.com> wrote: 
>> Why do 'we want to be able to have pieces of compiled code and
>> metadata that are not located in one continuous piece of memory'?
>> Is there a motive for making this change?
> 
> Yes, there are two reasons:
> 
> 1)  We would like to separate metadata from code in the CodeCache so
> that we (potentially) get better CPU cache utilization:
> 
> https://bugs.openjdk.java.net/browse/JDK-7072317
> 
> 2)  As described in my last year’s JVMLS talk our AOT solution uses
> shared libraries as a container format and as you know code and data
> need to be separate.

Thanks for the explanation, Christian. Perhaps it might be a good idea
to add a link to indicate that 7072317 relates to (or even is a
dependency of?) 8152664?

> If you haven’t been at JVMLS here is the recording of my talk and the
> section about the container format:
> 
> https://youtu.be/Xybzyv8qbOc?t=10m41s

I did watch this just after the summit -- great talk, by the way -- but,
needless to say, failed to retain the relevant detail from that long ago.

regards,


Andrew Dinn
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