Re: [dsdp-ercp-dev] Java 5 in devices

[Sebastian Mancke <s.mancke@xxxxxxxxx>]

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Hi Gorkem,

Gorkem Ercan schrieb:
> Hey Sebastian,
> Do you have any numbers what is the required hardware for having java
> 5 on a device.. Any CPU or memory requierements.
of course, this depends on the usage.

The storage size of the complete runtime: ~12 MB
A small java process: ~15 MB RAM
A bigger java process (SWT, some libraries, some images): ~30 MB RAM

On our Nokia n800 (TI OMAP 2420 @400 MHz) we have the following:
Start up speed Hello World: 3 seconds
Start up speed SWT Hello World: 10 seconds
Once the code bytecode is compiled, it runs *very* fast.

Even on the early linux mobile devices (e.g. yopy or zaurus with SA-1110
CPU @206 MHz) it is possible to run the the vms.

Currently our biggest problem is the start up speed. But we are hardly
working on a JIT-cache for cacao to improve this.

> By the way, did you already start doing a port of cacao for S60?
No. Just looked into it the APIs, somewhat. The Open C Layer should
provide the most parts, we need: libc, libz, libpthread, libdl. But
first we have to finish our JIT-cache. Currently jalimo fits our company
needs, so the next extensions will be mostly driven by our personal
interests ;-)

Regards,
  Sebastian

> --
> Gorkem
> 
> On Fri, Jun 6, 2008 at 11:11 AM, Sebastian Mancke <s.mancke@xxxxxxxxx> wrote:
> Hi,
> 
> we are also able to run the most 1.5 applications: http://www.jalimo.org
> My hope is also to get one of those vm's (e.g. cacao) to Symbian S60,
> this year.
> 
> Regards,
>  Sebastian
> 
> 
> Gaff, Doug schrieb:
>>>> Hi guys,
>>>>
>>>>
>>>>
>>>> I?m guessing you already know about this. Just thought I?d pass it on.
>>>>
>>>>
>>>>
>>>> Doug
>>>>
>>>>
>>>>
>>>> *From:* eclipse-incubator-e4-dev-bounces@xxxxxxxxxxx
>>>> [mailto:eclipse-incubator-e4-dev-bounces@xxxxxxxxxxx] *On Behalf Of
>>>> *Marcelo Paternostro
>>>> *Sent:* Wednesday, June 04, 2008 1:33 PM
>>>> *To:* E4 developer list
>>>> *Subject:* [eclipse-incubator-e4-dev] FYI: Java 5 in devices
>>>>
>>>>
>>>>
>>>> Hi,
>>>>
>>>> I've attended to a Sun event here in Toronto in which I've seen a Java 5
>>>> application running in an iPhone. Obviously I've asked what was the JVM
>>>> being used since JavaME is 1.4 based. The answer was
>>>> http://jamvm.sourceforge.net/. So perhaps adopting Java 5 in e4 may not
>>>> exclude folks that are currently developing for mobile devices.
>>>> Certainly is not keeping Sun developers and projects to move to a newer
>>>> level of the language ;-)
>>>>
>>>> Note for the curious ones: The "Java 5 application" is Grizzly
>>>> (https://grizzly.dev.java.net/) and the presenter was the project's team
>>>> leader, Jean François, a Sun Engineer.
>>>>
>>>> Best regards,
>>>>
>>>> Marcelo Paternostro
>>>> IBM Toronto Lab
>>>> 1-905-413-3942
>>>> marcelop@xxxxxxxxxx
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
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