Re: [Gumstix-users] hard realtime behavior?

[David S. <da...@cs...>]

Another option is running the kernel at user level over a hypvervisor  
as done by the OKL4 guys. Probably more work than the RTAI option,  
but worth being aware of.

ERTOS is the research side of things, OK labs is the commercial  
support side of them.

http://ertos.nicta.com.au
http://www.ok-labs.com

Dave.

On 30/08/2007, at 2:23 AM, Miles Colman wrote:

> Hi Harald,
>
> Thanks alot for your reply!
> I tried to start with a vanilla kernel, and apply the corresponding  
> patch, but the closest hardware platform I could find was the  
> Marvell PXA270 board. Did you apply Ingo's patch
> to the gumstix sources?
>
> Thanks,
> Miles
>
> On 8/30/07, Harald Roeck <hr...@gm...> wrote: On 8/29/07,  
> Miles Colman <mc...@gm...> wrote:
> > Hi everyone,
> >
> > I'm interested in getting hard realtime behavior out of a verdex  
> 6LP. I'm
> > somewhat new to linux, so if there's a  
> CONFIG_ENABLE_HARD_REALTIME option
> > somewhere I may have overlooked it. Has anyone used the RTAI  
> Linux kernel
> > extensions ( www.rtai.org) successfully on a verdex? I see from  
> the RTAI
> > page that the ARM platform is supported on PXA25x, however there  
> is no
> > mention of the PXA270. Also it looks like RTAI recommends an  
> official kernel
> > source. I would be interested to hear from anyone who has a  
> realtime OS on a
> > verdex (before I try to get RTAI installed by myself).
> >
> > Thanks,
> > Miles
> >
>
> Miles,
>
> we use the rt-preempt patches (see
> http://people.redhat.com/mingo/realtime-preempt/) on our verdex
> boards. right now I have an uptime of ~40 days with kernel version
> 2.6.21-rt8.
>
> there is also an rt-wiki where you can find some info about the
> rt-preempt patches and real-time linux in general:
> http://rt.wiki.kernel.org/
>
> regards,
> -Harald
>
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