robilad ([info]robilad) wrote,
@ 2008-09-30 17:30:00
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JVM Language Summit Roundup
I didn't make it to the JVM Language Summit myself, but the reports from Tim Bray, Ola Bini, Ted Leung, Cliff Click and the JavaPosse make it sound as if I missed a great little conference.

Fortunately, videos from talks have been recorded by InfoQ, and should be going up on the web sometime. Meanwhile the PDFs of presentations in the conference wiki offer some insight into what's been discussed. My favorite is John Rose's presentation on the Da Vinci VM, followed by the Scalify talk by Paul Phillips.

If you were reading the twitter feeds from the conference, you've already seen it: The JavaPosse podcast broke the news that Neal Gafter is now working for Microsoft, and Tim Bray and Ola Bini broke the news that Mark Reinhold is a big fan of getting invokedynamic into Java 7.

Interesting times ahead.

Update: Noch mehr Links dazu gibt's auf Deutsch bei JAXenter.

Update: More reports are coming in: Bryan Weber has a series of posts for each day of the summit, and an article by Gavin Clarke in The Register.



(8 comments) - (Post a new comment)

Any news about pointer compression?
[info]andersnorgaard.blogspot.com
2008-09-30 07:10 pm UTC (link)
Hi Dalibor,

Not being strictly multi-language specific - do you have any news about pointer compression in OpenJDK?

The last updates are a bit old, and the project seems abandoned?
http://blogs.sun.com/nike/entry/compressed_object_pointers_in_hotspot

Best
Anders

(Reply to this) (Thread)

Re: Any news about pointer compression?
[info]andersnorgaard.blogspot.com
2008-09-30 07:13 pm UTC (link)
Woops. Seems there was an update since I looked last

http://blogs.sun.com/nike/entry/leaving_sun

Pointer compression should be under review. Still, any news?

(Reply to this) (Parent)(Thread)

Re: Any news about pointer compression?
[info]robilad
2008-10-01 01:57 pm UTC (link)
Yes, see below. ;)

(Reply to this) (Parent)

Re: Any news about pointer compression?
[info]blog.juma.me.uk
2008-09-30 07:39 pm UTC (link)
There is some information here:

http://wikis.sun.com/display/HotSpotInternals/CompressedOops

I agree that it would be nice to get some information on how mature it is and what is the rough plan for integration in a released version of the JDK.

Ismael

(Reply to this) (Parent)(Thread)

Re: Any news about pointer compression?
(Anonymous)
2008-09-30 10:01 pm UTC (link)
Compressed pointer support was introduced in Java SE 6u6p, which is a
performance update. Support can be enabled by using the commandline
option -XX:+UseCompressedOops. The release is available from the
Performance page after a brief survey...

http://java.sun.com/javase/technologies/performance.jsp

This support is in JDK7, but it is off by default. Use the flag to
turn it on.

(Reply to this) (Parent)(Thread)

Re: Any news about pointer compression?
[info]blog.juma.me.uk
2008-09-30 11:23 pm UTC (link)
Thanks for the information. I downloaded the latest performance release and it's interesting that it already includes HotSpot 13.0-b04.

Ismael

(Reply to this) (Parent)

Another blog on the summit
(Anonymous)
2008-09-30 08:17 pm UTC (link)
Another few blog entries about the summit: http://www.nearinfinity.com/blogs/page/bweber/20080924


Cheers
Patrick

(Reply to this) (Thread)

Re: Another blog on the summit
[info]robilad
2008-10-01 02:41 pm UTC (link)
Thanks, Patrick, post updated accordingly.

(Reply to this) (Parent)


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