[riot-devel] HotSpot JVM on RIOT-OS?

Joakim Gebart joakim.gebart at eistec.se
Thu Aug 13 09:01:47 CEST 2015


You misread.
https://en.wikipedia.org/wiki/Raspberry_Pi#Specifications
RPi2 has 1 Gigabyte RAM, not Megabyte.

/JG


On Thu, Aug 13, 2015 at 3:41 AM, Zac Harvey <zharvey at pobox.com> wrote:
> Kaspar & Adam,
>
> Thanks for the ideas (lejos and non-JVM langs).  I am already in touch with
> the lejos admin.
>
> All,
>
> An earlier suggestion was to investigate SOCs like Raspberry Pi or
> BeaglBoard.  At first I thought: OK this is exactly what I need! But now
> that I'm really thinking about it, there's something that leaves me feeling
> uneasy here.
>
> So the main argument against the ARM SAM3X8E for a JVM is that it only has
> 512KB ROM and 96KB RAM.  But after researching the RaspberryPi, the later
> models are using an ARM Cortex-A7 CPU that, according to Wikipedia it has
> 1MB RAM. So this doesn't make sense: why is RaspberryPi touted as a
> JVM-capable ARM-based SOC, whereas SAM3X8E is totally incapable of such a
> feat (nothing in the modern Java landscape will run on 1MB).
>
> Clearly I'm missing something here, but: what is the difference between
> RapsberryPi's ARM processor vs SAM3X8E that makes it capable of running a
> Java app?!?
>
> Thanks,
> Zac
>
>
>
>
> On 8/12/15 2:30 PM, Adam Hunt wrote:
>
> While I applaud the idea of getting something as heavyweight as a JVM to run
> on the type of devices that most of us on this list are targeting have you
> thought about non-JVM languages? I've often wondered how small of a system
> Erlang could be persuaded to running on.
>
> On Wed, Aug 12, 2015 at 4:47 AM Kaspar Schleiser <kaspar at schleiser.de>
> wrote:
>>
>> Hey,
>>
>> On 08/12/2015 01:36 PM, Zac Harvey wrote:
>> > still planning on using RIOT-OS if it all possible.
>>
>> When you're evaluating embedded JVMs, take a look at the VM used by
>> leJOS. It seems like it could rather easily be cut out of the OS, and it
>> is apparently very capable even on the lego NXTs (64kb RAM, 256kB
>> flash), and seems like more than a research proof-of-concept.
>>
>> Kaspar
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>
>
>
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