Aw: Re: Aw: Re: [RTnet-users] [Xenomai-help] rtnet / Xenomai: Kernel

["M. Koehrer" <mathias_koehrer@domain.hid>]

O.k,

I tried once more with the  NMI watchdog stuff.
However, it looks as if I do not understand the NMI watchdog correctly...
I passed nmi_watchdog=1 as kernel parameter.
Now, the NMI watchdog seems to be o.k.
I have set the kernel parameter "NMI watchdog latency threshold (us)" to 1000000 (1 second).
Now I do a modprobe xeno_nucleus.
This is o.k.
Then I do a modprobe xeno_native.
This leads to a watchdog NMI on the console after 1s.
"NMI watchdog detected timer latency above 100000us"
CPU 1
EIP is at mwait_idle 0x23/0x37

When I compile the Xenomai functionality directly into the kernel (no modules), I never reach
the login prompt at my PC as the NMI watchdog from above came first...

Well, somehow the NMI stuff seems to work. However, I am not able to start my application
as my systems gets the NMI before I have the chance to start the application...
What is wrong here? I think, I miss one piece in the puzzle...

Thanks for any support on that strange behaviour.

Regards

Mathias



----- Original Nachricht ----
Von:     Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
An:      "M. Koehrer" <mathias_koehrer@domain.hid>
Datum:   18.12.2006 15:29
Betreff: Re: Aw: Re: [RTnet-users] [Xenomai-help] rtnet / Xenomai: Kernel
 2.6.19.1

> M. Koehrer wrote:
> > Hi Jan,
> > 
> > I tried disabling SMP - but no success...
> > Unfortuantely, the SMI watchdog does not work on my machine.
> > After booting the PC, dmesg shows me the line
> > Xenomai: NMI watchdog not available.
> > 
> > Is the NMI watchdog support somehow configurable or is this a real
> hardware issue?
> > 
> > For patching the kernel, I used the adeos-ipipe-2.6.19-i386-1.6-02.patch
> which is
> > part of Xenomai.
> > 
> > As I do not see an easy way to get the 2.6.19.* running,  I think, I will
> switch back to 
> > the latest 2.6.17.* kernel (2.6.17.14) which works fine.
> 
> In order to get the NMI watchdog, you have to enable it on kernel
> command line, passing nmi_watchdog=2 or nmi_watchdog=1. Read linux
> Documentation/nmi_watchdog.txt for more details.
> 
> -- 
>                                                  Gilles Chanteperdrix
> 

-- 
Mathias Koehrer
mathias_koehrer@domain.hid


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