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Posted to dev@harmony.apache.org by Thorbjørn Ravn Andersen <th...@gmail.com> on 2005/05/18 13:33:35 UTC
[arch] VM Candidate : JNode
I would like to mention the JNode VM. It is written in Java with a
platform specific nanokernel (currently a stable x86 and a development
X86_64) with the direct aim of running a full Java enviroment on the
bare metal.
The performance figures show that the JIT gives performance higher than
50% of the 1.4.2 hotspot.
http://jnode.sourceforge.net/portal/node/51
It is currently rather hungry for memory and has a suboptimal GC. A
patched GNU Classpath is used.
--
Thorbjørn
RE: [arch] VM Candidate : JNode
Posted by Renaud BECHADE <re...@numerix.com>.
＞＞However, a generic JIT-plugin framework would be quite interesting.
Yes!!!!
(as it could enable to separate java five base libraries support + some
runtime stuffs [JNI/CNI and co] from pure JIT concerns...)
-----Original Message-----
From: Thorbjørn Ravn Andersen [mailto:thunderaxiom@gmail.com]
Sent: Thursday, May 19, 2005 2:47 AM
To: harmony-dev@incubator.apache.org
Subject: Re: [arch] VM Candidate : JNode
shudo@computer.org wrote:
> Those scores seems to be produced by HotSpot Client VM.
>
>If HotSpot Server VM was used, the score of Sun J2SDK 1.4.2
>will be higher than 7500.
>
>
I have not verified the numbers myself, since I do not currently have a
machine where it runs out of the box (network drivers are quite limited).
>(*1) TYA: a JIT compiler, http://sax.sax.de/~adlibit
>
>
However, a generic JIT-plugin framework would be quite interesting.
--
Thorbjørn
Re: [arch] VM Candidate : JNode
Posted by Thorbjørn Ravn Andersen <th...@gmail.com>.
shudo@computer.org wrote:
> Those scores seems to be produced by HotSpot Client VM.
>
>If HotSpot Server VM was used, the score of Sun J2SDK 1.4.2
>will be higher than 7500.
>
>
I have not verified the numbers myself, since I do not currently have a
machine where it runs out of the box (network drivers are quite limited).
>(*1) TYA: a JIT compiler, http://sax.sax.de/~adlibit
>
>
However, a generic JIT-plugin framework would be quite interesting.
--
Thorbjørn
Re: [arch] VM Candidate : JNode
Posted by sh...@computer.org.
> I would like to mention the JNode VM.
> The performance figures show that the JIT gives performance higher than
> 50% of the 1.4.2 hotspot.
>
> http://jnode.sourceforge.net/portal/node/51
Those scores seems to be produced by HotSpot Client VM.
If HotSpot Server VM was used, the score of Sun J2SDK 1.4.2
will be higher than 7500.
JNode is a great effort, I respect it and performance will not be
the primary target of the harmony. But Sun's runtime performes better
than the page shows.
Sorry for being off-topic a little.
P.S.
I found One of benchmark programs, Sieve.java in jnodesources-0.2.0.tar.gz
looks same as Sieve.java distributed with TYA (*1).
The Sieve.java has been distributed with TYA since 1999 at least,
but one with JNode 0.2.0 has a line "Copyright (C) 2005 JNode.org".
Is Sieve.java in public domain?
(*1) TYA: a JIT compiler, http://sax.sax.de/~adlibit/
Kazuyuki Shudo shudo@computer.org http://www.shudo.net/
Re: [arch] VM Candidate : JNode
Posted by "Geir Magnusson Jr." <ge...@apache.org>.
On May 19, 2005, at 3:37 PM, Thorbjørn Ravn Andersen wrote:
> Geir Magnusson Jr. wrote:
>
>
>> Can the VM be tweaked to work on standard OSs?
>>
>
> Not immediately. I have raised the Harmony issue on the
> development forums, so I hope that they show interest in the issue
> here, and may be able to elaborate on whether JNode might be a
> suitable starting spot for Harmony.
>
Please let us know how it goes. Thanks :)
geir
>
>
--
Geir Magnusson Jr +1-203-665-6437
geirm@apache.org
Re: [arch] VM Candidate : JNode
Posted by Thorbjørn Ravn Andersen <th...@gmail.com>.
Geir Magnusson Jr. wrote:
> Can the VM be tweaked to work on standard OSs?
Not immediately. I have raised the Harmony issue on the development
forums, so I hope that they show interest in the issue here, and may be
able to elaborate on whether JNode might be a suitable starting spot for
Harmony.
Re: [arch] VM Candidate : JNode
Posted by "Geir Magnusson Jr." <ge...@apache.org>.
Can the VM be tweaked to work on standard OSs?
On May 18, 2005, at 7:33 AM, Thorbjørn Ravn Andersen wrote:
> I would like to mention the JNode VM. It is written in Java with a
> platform specific nanokernel (currently a stable x86 and a
> development X86_64) with the direct aim of running a full Java
> enviroment on the bare metal.
>
> The performance figures show that the JIT gives performance higher
> than 50% of the 1.4.2 hotspot.
>
> http://jnode.sourceforge.net/portal/node/51
>
> It is currently rather hungry for memory and has a suboptimal GC.
> A patched GNU Classpath is used.
>
> --
> Thorbjørn
>
>
>
>
--
Geir Magnusson Jr +1-203-665-6437
geirm@apache.org