[graalvm-users] GraalVM native images in embedded IoT-context

[Samuel Audet]

Johan,

How do you guys create your images for aarch64?

Samuel

On 10/9/20 8:53 PM, Ramsey Gurley wrote:
> Someone can correct me if I am wrong, since I haven't tried.
> 
> According to what I've read, images built with jaotc are processor
> dependent and considered very beta quality. images built with
> native-image are not. There is no arm 32 bit native-image, because there
> is no graalvm for arm except for aarch64, but jaotc is included with
> java 10+.
> 
> I'm under the impression it is possible to cross compile a native image,
> but you would need a copy of the target graalvm as well as libc and
> other things. It is probably hard and you're better off compiling on
> aarch64 if you can :)
> 
> My guess is you would be okay building native-image on gravitons to
> deploy on whatever aarch64 device you want. Even with limited ram, you
> could build on device with enough swap, but that's just going to be
> really painfully slow.
> 
> 
> On 10/9/20 4:12 PM, Thorsten Schöning wrote:
>> Guten Tag Ramsey Gurley,
>> am Donnerstag, 8. Oktober 2020 um 12:44 schrieben Sie:
>>
>>> I haven't gotten to the point of deploying one yet, but I've built
>>> them on aarch64. It takes a lot of memory. A hello world vertx
>>> application built with native-image takes nearly 4GB of RAM to
>>> build. You will probably want to build your native images on AWS
>>> graviton2 instances for more speed and available memory.
>> Thanks for mentioning that, didn't have that in mind at all. :-)
>>
>> How identical need the build server be to the system where things get
>> deployed to in the end? Same CPU, but different amount of RAM only? Or
>> is a different CPU OK if it's the same ARM-architecture? Like all
>> aarch64 are OK, regardless model, number of cores or alike? Is there
>> any cross-compiling possible for aarch64 native images on x86-64?
>>
>> I'm wondering because the SoC discussed for me currently is only
>> available with 256 MiB of RAM at all, so one really would need to
>> build somewhere else. Besides the fact that it might not even be 64
>> Bit and might not work at all with native image. :-/
>>
>> Mit freundlichen Grüßen,
>>
>> Thorsten Schöning
>>