Re: [rvm-research] Why more heap required to finish Dacapo iteration runs?

Hi,

> Thank you for the explanation first!
> This becomes interesting, since I tested it with Hotspot 1.7 and Jikes
> 3.1.3. Dump the heap and compare what is changing is a good way.

not sure whether there is a way to dump the heap with Jikes RVM. Maybe
rdb [1] can do it or others on this list know of a way how.

> One question is will the compiled code after warmups be in the heap
> dumps? Or we can just compare real heap usage between two GCs (like, GC
> size_x -> size_y, and so size_x is the real heap usage for nursery)?

HotSpot doesn't include compiled code in its heap dumps.

That being said, I am not sure what you mean by the second question: Are
you referring to some kind of debug output like the one obtained with
-verbose:gc? And how does the nursery fit into this? So far, we have
been talking about the minimum total heap size growing over time, right?

Best wishes,

Andreas

[1] <http://sape.inf.usi.ch/rdb>


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