64-bit client VM
David.Holmes at oracle.com
Sat Jun 25 10:05:24 UTC 2011
Aekold Helbrass said the following on 06/25/11 19:37:
> Sorry if this is wrong mailing list to ask that question, but it's the
> only one that looks suitable by its description...
It's really a hotspot question so I've cc'ed that list.
> README file tells "64-bit client builds are not directly supported". So:
> 1) What is the reason of this? Does it mean that client vm source code
> was not adapted to 64-bit systems or just that Sun/Oracle don't want
> to provide technical support for this?
We don't build it nor test it on a regular basis internally. The code
was originally developed for a proprietary product - Sun Java Real-Time
System - and was then added to OpenJDK. We don't officially support it.
> 2) How badly unsupported it it? Will it work fine but possibly will
> have some bugs, will it work fine but not as efficient as 32-bit
> client, or it will hardly work at all?
I don't know where it stands regarding support for latest Java 7
features, but otherwise it should work ok. No idea how to compare
performance against 32-bit client.
Build it and see is all I can advise. The Makefiles will need some
tweaking to allow this when doing a full JDK build. Otherwise I think
you can just do:
make LP64=1 product1
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