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hi,Guennadi:<br>
<br>
Guennadi Liakhovetski wrote:
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<pre wrap="">On Thu, 8 May 2008, Nevo wrote:
</pre>
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<pre wrap="">Guennadi Liakhovetski wrote:
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<pre wrap="">On Thu, 8 May 2008, Nevo wrote:
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<pre wrap=""> There has been a crazy idea for me to embed kaffe VM or phoneme CDC vm
to
Linux kernel as a separate module to speed up vm execution,so vm can
directly
access hardware. But you know,that should break up the role of JVM as a
sandbox...... and we chould not prove the feasibility yet...
</pre>
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<pre wrap="">Yeah, don't think the kernel crowd would be particularly inspired by this
idea:-)
</pre>
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<pre wrap=""> Maybe Java OS might be more specific and practical :) . Anyway ,it is on my
ToDO list.
</pre>
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<pre wrap=""><!---->
You are late (at least on AVR):
<a class="moz-txt-link-freetext" href="http://www.harbaum.org/till/nanovm/index.shtml">http://www.harbaum.org/till/nanovm/index.shtml</a>
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nanovm ? :) that's too hardware dependent. But the overview concept
is approaching my idea . Thank you very much.<br>
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<pre wrap="">
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<pre wrap=""> Now I saw your idea, I guess you mean JIT on AVR32 ?
</pre>
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<pre wrap="">Well, in "Java Technical Reference" from Atmel they call it "Java Extension
Module (JEM)".
</pre>
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<pre wrap=""> if you wanna do hardware acceleration ,we could consider libJIT which is
mentioned Kaffe document.
</pre>
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<pre wrap=""><!---->
Well, I'm not an expert in this, but I don't know if this really would
make any improvement. With hardware acceleration you "just" throw your
bytecode at the CPU and it processes it just as if it were native code.
So, I don't see how JIT could be useful here. Also, it is unlikely to make
our work easier, or would it? I'd go as simple as possible to start with.
</pre>
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You mignt mean Jazelle like technology actually. <br>
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<pre wrap="">I've been as a JVM developer for mobile & CE devices. Maybe I would be
glad to help you make you do a port to AVR32 ,but I am in China,the AVR
board might not be easy to find in public market ..
</pre>
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<pre wrap="">That sounds very good! Now, after I've written my first email to the kaffee
ML, I found JamVM, which is smaller, and is already ported to AVR32! In pure
software mode, of course. So, I think, we could start with that one. If you
prefer kaffee, you are certainly most welcome to try to port it over too! We
anyway have ti first get it run in software mode, before implementing
hardware acceleration.
</pre>
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<pre wrap=""> Yep,both Kaffe and JamVM are good thing to learn. What kind of applications
would you want to run on AVR32?
</pre>
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Ideally none:-) As I said, I'm just interested in the idea per se. Will
see how it comes out.
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Hardware accelerated jvm for embedded device would be promising and
much interesting . We could see on that day.<br>
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<pre wrap="">
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<pre wrap="">On low-end devices,enable JIT would be expensive.
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Ok, then we better forget it (for now at least).
</pre>
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<pre wrap=""> Now that JamVM is working on AVR32,maybe we need some benchmark or
something.
I have said that I would be glad and interested to help a fresh port on
AVR32 ,so i think JamVM would be fine..:)
</pre>
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<pre wrap=""><!---->
Good! Then I would suggest to move further discussion to the jamvm list
(<a class="moz-txt-link-freetext" href="https://lists.sourceforge.net/lists/listinfo/jamvm-general">https://lists.sourceforge.net/lists/listinfo/jamvm-general</a>). I'll write
there with CC you and attach a very slightly cleaned up avr32 patch for
JamVM from Leen Toelen.
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<pre wrap="">As for the hardware - as I said, as soon as I get the board, I can provide
an ssh login to it to you or any other interester parties. I could even
provide a serial console, if that will be needed too. I think, this should
be enough for the beginning.
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<pre wrap=""> That would be great.... There should be many experts here.....:)
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<pre wrap=""><!---->
I'll let you know when the board arrives.
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Thank you :) . Maybe I should find some emulator first :)<br>
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<pre wrap="">
Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
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