[Xenomai] Support of Beagleboard xm rev C on 3.14-ipipe

Arnaud Degroote arnaud.degroote at isae.fr
Mon Jun 30 10:16:30 CEST 2014


On 27/Jun - 18:27, Gilles Chanteperdrix wrote:
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> On 06/27/2014 09:22 AM, Arnaud Degroote wrote:
> > On 26/Jun - 19:27, Gilles Chanteperdrix wrote:
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> >> On 06/26/2014 01:19 PM, Arnaud Degroote wrote:
> >>> On 26/Jun - 13:08, Gilles Chanteperdrix wrote:
> >>>> switchtest is another story. Does switchtest hang, or does
> >>>> the system completely freeze?
> >>> 
> >>> switchtest hangs, but the system is still responsive. I can
> >>> ctrl-c it and restart it. On C-c, it prints "properly" a number
> >>> of ctx switches done (which is far from other "normal"
> >>> values).
> >>> 
> >> You mean it is as if switchtest had continued switching contexts
> >> but had not printed anything? Do you see counters incrementing
> >> in /proc/xenomai/stat ?
> > 
> > I just meant that switchtest seems to respond properly to C-c, even
> > if it does not progress. But counters from /proc/xenomai/stat
> > stops incrementing at some point.
> > 
> You are running switchtest alone, after booting, nothing else is
> running in the background, right? If yes, then that would mean that an
> error in FP handling was detected. Do you get a message in the kernel
> logs, or a message by switchtest itself?

Well, there is a few thing in the background running (such as dhclient,
nfsd, sshd, ...). I disabled them all but the behaviour does not change. 

I try to run switchtest --no-fpu and I observe the same behaviour (i.e.
it hangs after a number of context switch), so I don't think it is FP
related.
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