Re: [Xenomai-help] Marvell sheeva support

[Philippe Gerum <rpm@xenomai.org>]

On Thu, 2010-08-12 at 16:45 +0100, Tim Cussins wrote:
> Hi all,
> 
> On Wed, 2010-08-11 at 15:58 +0100, Tim Cussins wrote:
> 
> > I took the mv88f6290 patch and bullied it into applying to vanilla
> > 2.6.29. Built ok, but was at home and no way to test, so I just got on
> > with migrating it to 2.6.33. That seems to be done - check the 2.6.33
> > boot output:
> >   
> >    ...
> >   I-pipe: Domain Xenomai registered.
> >   Xenomai: hal/arm started.
> >   Xenomai: scheduling class idle registered.
> >   Xenomai: scheduling class rt registered.
> >   Xenomai: real-time nucleus v2.5.4 (Sleep Walk) loaded.
> >   Xenomai: starting native API services.
> >   Xenomai: starting POSIX services.
> >   Xenomai: starting RTDM services.
> >    ...
> 
> Just a status update - I think I'm pretty much were Sergey was back here
> (+ some):
> 
> vanilla 2.6.33 kernel +
> adeos-ipipe-2.6.33-arm-1.17-02.patch +
> kirkwood specific stuff (taken from adeos-ipipe-2.6.29-mv88f6290.patch)
> 
> I can run all the xenomai apps. As with Sergey I'm seeing negative
> values for the minimum latency, which seems odd. See Sergey's post if
> interested:

Negative values are ok, they just mean that the timer shot is too much
anticipated for your hardware, which has better latency than defined by
the default calibration value.

Try reducing the value in /proc/xenomai/latency (i.e. echo (ns)
> /proc/xenomai/latency), until the latency test shows a minimum latency
slightly above 0.

> 
> http://www.mail-archive.com/xenomai@xenomai.org
> 
> Cheers,
> Tim
> 
> 
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-- 
Philippe.