[concurrency-interest] @Contended (JEP-142)

Alan Bateman Alan.Bateman at oracle.com
Fri Nov 30 09:26:03 EST 2012


On 30/11/2012 14:20, Kirk Pepperdine wrote:
> I might add that the object ID information in OpenJDK in the binary format corresponds to address in heap and there is sizing information in there. If the padding is a regular field, it should show up as it would be the GC threads that are asked to perform the dump.. so the dump should contain what they would naturally see.
>
> -- Kirk
>
It depends. For the built-in heap dumper then you are right as the ID is 
the object address and we've seen tools make use of that. For heap dumps 
generated by the hprof agent then it's just a generated number and so 
isn't too useful.

-Alan.


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