[meta-freescale] Imx6q and linux-imx-rt status

[Jacob Kroon]

Hi Daiane,

On Tue, Jan 6, 2015 at 12:29 PM, Daiane Angolini <daiane.list at gmail.com>
wrote:

> On Mon, Jan 5, 2015 at 5:53 PM, Jacob Kroon <jacob.kroon at gmail.com> wrote:
> > Hi Simone,
> >
> > On Mon, Jan 5, 2015 at 8:16 PM, Simone <cjb.sw.nospam at gmail.com> wrote:
> >>
> >> Dear All,
> >> I discovered today that in meta-fsl-arm exist a recipe that apply
> realtime
> >> patch to kernel for imx6. Wow!
> >>
> >> I want to know in which status is it, and something about the
> performance
> >> compared to standard kernel (linux-imx).
> >> Which values of jitter and latency are guaranteed by the kernel?
> >> Does it work also with imx6q processor or only with single core?
> >>
> >
> > I've used the kernel on SabreSD and Wandboard-Solo/Dual/Quad boards.
> > Worst case "cyclictest" latency I've seen has been ~150 us, on average
> ~40
> > us.
> >
> >> Are there some known problems that I should know before start testing
> it?
> >> Are there some documentation I can read somewhere?
> >>
> >
> > I am not aware of any current issues with it so please go ahead and test,
> > however it is a community effort
> > as Freescale (at least to my knowledge) does not provide professional
> > support for the rt-patch.
>
> I have not documented anything about linux-imx-rt in #RN
>
> 1) because I don't really know it
> 2) because it's not a default kernel for any board, so the script does
> not "find" it when looking for the "default linux kernel providers"
>
> However, being a community effort makes it even more important to be
> documented.
>
> I would suggest for the first draft, include the kernel description
> and a small section with some more information such as external links
> and what to expect. What do you think?
>
> Would you mind to help me on that?
>
>
Sure, I can write something up, let me just locate the doc git repo, as I
haven't used it before.

Jacob
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