[Xenomai] Xenomai/Cobalt on ARM64

[Xenomai] Xenomai/Cobalt on ARM64

[BREGARDIS Cedric]

Hi,

I'm studying the possibility to use xenomai/colbalt 3.x for arm64.  It
seems arm64 port of xenomai is not yet released and only available in
"next" branch. In this branch it is indicated (in file
kernel/cobalt/arch/arm64/patches/README) that the ipipe patch is
available in this repository:

git://git.xenomai.org/ipipe.git, branch devel/ipipe-3.18-linaro-arm64.

However it seems this repository does not provide this branch. Do you
know what version of ipipe should be used for arm64?

Furthermore do you have an idea of the stability of xenomai for arm64
and when it could be expected to be released as a stable version?

Best regards,
Cedric Bregardis

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Re: [Xenomai] Xenomai/Cobalt on ARM64

[Philippe Gerum]

On 06/09/2016 06:25 PM, BREGARDIS Cedric wrote:
> Hi,
> 
> I'm studying the possibility to use xenomai/colbalt 3.x for arm64.  It
> seems arm64 port of xenomai is not yet released and only available in
> "next" branch. In this branch it is indicated (in file
> kernel/cobalt/arch/arm64/patches/README) that the ipipe patch is
> available in this repository:
> 
> git://git.xenomai.org/ipipe.git, branch devel/ipipe-3.18-linaro-arm64.
> 
> However it seems this repository does not provide this branch. Do you
> know what version of ipipe should be used for arm64?

This branch should be used: ipipe-4.1.y.

> 
> Furthermore do you have an idea of the stability of xenomai for arm64

The architecture passes all Xenomai tests, but that won't mean much
until we have some perspective from production systems.

> and when it could be expected to be released as a stable version?
> 

The arm64 port will be part of the Xenomai 3.1 release, for which there
is no ETA yet.

-- 
Philippe.

Re: [Xenomai] Xenomai/Cobalt on ARM64

[Jorge Ramirez]

On 11/06/2016 11:29 AM, Vivien LEGER wrote:
> Thanks for this very fast anwser.
>
> I d love to say that i wish to bring my part to the edifice , still as a
> young father of two that would be unmanageable for now.
>
> I ll be using A53 series with xenomai a lot (running as an armv7), i
> quickly hope to jump to a A72 for work purpose.

even thought we haven't been able to make much progress on aarch64 - in 
terms of merging- please see the link below on some early demos
http://www.96boards.org/blog/xenomai-on-the-96boards/

During San Diego ELC-A 2016 I demonstrated Xenomai controlling motors on 
AOSP(Android) and Debian using the HiKey board (armv8) - basically 
having a service controlling the pwm signal to a number of servos using 
gpios. For the AOSP the service was using glibc (not bionic)
http://www.96boards.org/blog/servo-motor-control/

if you are looking for arm64 platforms to work these are two of the ones 
I use (HiKey and db410c)
http://www.96boards.org/products/ce/


>
> Thus there is some chance i end up diving in the ipipe patch for aarch64,
> be sure i ll keep in touch if i came close to something sharable.
>
> VL.
>
> Note : several of my colleague and Iare building a xenomai based distro as
> a side project, 3 of us are really arm enthousiasts, we hope to be able to
> contribute some day.

Re: [Xenomai] Xenomai/Cobalt on ARM64

[Vivien LEGER]

Thanks for this very fast anwser.

I d love to say that i wish to bring my part to the edifice , still as a
young father of two that would be unmanageable for now.

I ll be using A53 series with xenomai a lot (running as an armv7), i
quickly hope to jump to a A72 for work purpose.

Thus there is some chance i end up diving in the ipipe patch for aarch64,
be sure i ll keep in touch if i came close to something sharable.

VL.

Note : several of my colleague and Iare building a xenomai based distro as
a side project, 3 of us are really arm enthousiasts, we hope to be able to
contribute some day.

On Sun, Nov 6, 2016 at 10:35 AM, Philippe Gerum <rpm@xenomai.org> wrote:

> On 11/02/2016 02:19 PM, Vivien LEGER wrote:
> > Hello everyone.
> >
> > I understand that xenomai is not quite ready for ARM64 and that no ETA is
> > yet determined.
> >
> > Would you have a rough estimate of the target for this version. Is ARM64
> a
> > big thing to you or is it still considered nice to have?
>
> FWIW, I'm personally interested in using arm and arm64 as the reference
> architectures of a more "radical", lean and mean and scalable dual
> kernel implementation in the future than Xenomai has ever been. Having a
> stable arm64 port in Xenomai 3 would pave this way.
>
> Now, this is all wishful thinking until time can be invested in fixing
> up the I-pipe patch for the Linux 4.1 series as a starting point, and so
> far this did not happen.
>
> >
> > I have also a thought for Gilles, that wrote so many post.I ve rid him
> for
> > hours trying to understand what i was doing wrong. The page on the
> xenomai
> > website truly shook me.
> >
>
> Gilles was one of a kind; who is unique won't be forgotten.
>
> --
> Philippe.
>

Re: [Xenomai] Xenomai/Cobalt on ARM64

[Philippe Gerum]

On 11/02/2016 02:19 PM, Vivien LEGER wrote:
> Hello everyone.
> 
> I understand that xenomai is not quite ready for ARM64 and that no ETA is
> yet determined.
> 
> Would you have a rough estimate of the target for this version. Is ARM64 a
> big thing to you or is it still considered nice to have?

FWIW, I'm personally interested in using arm and arm64 as the reference
architectures of a more "radical", lean and mean and scalable dual
kernel implementation in the future than Xenomai has ever been. Having a
stable arm64 port in Xenomai 3 would pave this way.

Now, this is all wishful thinking until time can be invested in fixing
up the I-pipe patch for the Linux 4.1 series as a starting point, and so
far this did not happen.

> 
> I have also a thought for Gilles, that wrote so many post.I ve rid him for
> hours trying to understand what i was doing wrong. The page on the xenomai
> website truly shook me.
> 

Gilles was one of a kind; who is unique won't be forgotten.

-- 
Philippe.

Re: [Xenomai] Xenomai/Cobalt on ARM64

[Vivien LEGER]

Hello everyone.

I understand that xenomai is not quite ready for ARM64 and that no ETA is
yet determined.

Would you have a rough estimate of the target for this version. Is ARM64 a
big thing to you or is it still considered nice to have?

I m currently building a distro using yocto and target to use xenomai with
it. As i plan to use it on a ARM-A53 (among others) i was just wondering.

Thank you very much for your wonderfull work.

It is my first post on the mailling list, i ve been using xenomai for 6
years now, and i would like to thanks anyone that indirectly helped me by
replying to others.

I have also a thought for Gilles, that wrote so many post.I ve rid him for
hours trying to understand what i was doing wrong. The page on the xenomai
website truly shook me.

Best Regards.

Vivien.