RTEMS in AMP mode

[Alan Cudmore]

Is the POSIX API preferred for RTEMS applications moving forward?

Thanks,
Alan

On Wed, Oct 17, 2018 at 5:20 AM Sebastian Huber <
sebastian.huber at embedded-brains.de> wrote:

> On 15/10/2018 14:23, Thawra Kadeed wrote:
> >
> > Thanks a lot Sebastian for referring me to the git master.
> >
> > Actually, I cloned the current git master and I was looking for the
> > RTEMS kernel (source code) and I have found it in this path:
> >
> > "rtems-master/cpukit/rtems"
> >
> > I think this is the RTEMS library which constitutes the RTEMS kernel
> > in general irrespective to other features and modules attached to it.
> > Is that right?
>
> This directory contains the Classic API implementation which I would not
> use in new applications. The core operating system parts are in
> cpukit/score.
>
> >
> > On the other hand, RTEMS supports dynamic memory allocation (DMA) and
> > priority inheritance. However and as I understood from you, if we
> > choose priority-based scheduling (which is another scheduling policy)
> > and static memory allocation by the App, then the executable file will
> > automatically have only these features without by example the DMA, so
> > I think it is all the App dependent, right?
>
> RTEMS uses currently dynamic memory (the so called workspace) internally
> for some things. This was also the case 20 years ago. Maybe we can get
> rid of using dynamic memory in some time. By default, it is only used by
> the operating system during system initialization.
>
> Only the services used by the application and the operating system are
> included in the executable. For example, if you don't use the FAT file
> system, then the stuff for the FAT file system is not in your executable
> even though the FAT file system support is in the librtemscpu.a which
> you used to link your executable.
>
> --
> Sebastian Huber, embedded brains GmbH
>
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone   : +49 89 189 47 41-16
> Fax     : +49 89 189 47 41-09
> E-Mail  : sebastian.huber at embedded-brains.de
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>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>
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