Re: [RTnet-developers] [Xenomai-help] [RFT] RTnet on x86_64

[Philippe G. <rp...@xe...>]

On Sat, 2007-02-24 at 10:42 +0100, Philippe Gerum wrote:
> On Sat, 2007-02-24 at 00:10 +0000, Paul wrote:
> > Hi Jan
> > 
> > On Friday 23 February 2007 23:30, Jan Kiszka wrote:
> > > recent development on Xenomai and the underlying I-pipe patch [1]
> > > reached a point where real experiments on yet another architecture for
> > > RTnet are starting to make sense.
> > >
> > > In fact, RTnet has been enabled to build over x86_64 already two weeks
> > > back, including a necessary fix to the RTDM layer. I just checked again:
> > > it still compiles fine. 8)
> > >
> > > I'm lacking a test platform, so _you_ have the unique chance to be the
> > > first person running RTnet on 64 bits! Grab a 2.6.19 kernel and the
> > > latest I-pipe patch [2], checkout Xenomai [3] and RTnet trunk [4]. Put
> > > everything on some native 64-bit Linux installation and give it hell.
> > 
> > As you probably know, I've already committed to running tests over the weekend 
> > on real hardware - Not being familiar with RTnet, are there any test suites 
> > that can be used on say i386<->AMD64<->ppc ?
> > 
> > > Ah, and don't forget to report your findings!
> > 
> > /me is good at breaking "stuff" and reporting the results ;)
> > 
> > 
> 
> Btw, to push SMP too hard for now, I've just discovered an instability
> under RT operations, and enabling the tracer over SMP does introduce
> another random issue here. UP still looks fine. I'm going to chase the
> SMP issues now.
> 

CONFIG_PREEMPT breaks the toy when enabled, so you should be able to
safely run the Xenomai stack over SMP/x86_64 without preemption for the
time being.

-- 
Philippe.