[Xenomai-help] Xenomai and Busybox

[Xenomai-help] Xenomai and Busybox

[Axel Beierlein]

Hello,

which minimal requirements are needed when i want to use Xenomai with  
Busybox?

In my present configuration i have Xenomai 2.3.1 and Busybox 0.60.5  
workin. But when I try to call xeno-info or xeno-config i get informations  
like this:

  --If some fields are empty or look unusual you may have an old version.
    Compare to the current minimal requirements in Documentation/Changes.

or i get a message like that:

unset: not found


Regards

Axel

Re: [Xenomai-help] Xenomai and Busybox

[Jan Kiszka]

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Axel Beierlein wrote:
> Hello,
> 
> which minimal requirements are needed when i want to use Xenomai with  
> Busybox?
> 
> In my present configuration i have Xenomai 2.3.1 and Busybox 0.60.5  
> workin. But when I try to call xeno-info or xeno-config i get informations  
> like this:
> 
>   --If some fields are empty or look unusual you may have an old version.
>     Compare to the current minimal requirements in Documentation/Changes.
> 
> or i get a message like that:
> 
> unset: not found
> 

xeno-test claims:

"BusyBox >= 1.1.3 with a make defconfig should provide all needed applets."

At the same time it includes checkUtilities(), a function to test for
all required tools and report what is missing. Could you dig deeper why
you don't get this?

Jan


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[Xenomai-help] Xenomai and Busybox

[Roderik_Wildenburg]

Does anyone use Busybox(www.busybox.net) on a xenomai-linux ?
Or does anyone experience one of these problems with busybox on xenomai
:
- yes > /dev/null stalls system completely (yes is a little program
returning 'y' continously; this does not happen using a normal bash
shell)
- "netstat -a" seems to delay realtime execution (periodic task produces
overruns). I have no idea how this could happen, as I thought xenomai
has highest priority and, as far as I have seen, netstat does not
anything else than reading /proc/net/netstat.

We experienced these problems on a PPC 2.4 xenomai-linux.

Any suggestions/ideas/explanations ?

Many thanks in advance
Roderik 

MAN Roland Druckmaschinen AG
Vorsitzender des Aufsichtsrates: Hanno C. Fiedler
Vorstand: Gerd Finkbeiner (Vorsitzender), Dr. Ingo Koch, Dr. Markus Rall, Paul Steidle    
Sitz der Gesellschaft: Offenbach am Main, Registergericht: Amtsgericht Offenbach HRB-Nr. 42592    
USt-Ident-Nr. DE 250200933

Re: [Xenomai-help] Xenomai and Busybox

[Jan Kiszka]

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Roderik_Wildenburg@domain.hid wrote:
> Does anyone use Busybox(www.busybox.net) on a xenomai-linux ?
> Or does anyone experience one of these problems with busybox on xenomai
> :
> - yes > /dev/null stalls system completely (yes is a little program
> returning 'y' continously; this does not happen using a normal bash
> shell)
> - "netstat -a" seems to delay realtime execution (periodic task produces
> overruns). I have no idea how this could happen, as I thought xenomai
> has highest priority and, as far as I have seen, netstat does not
> anything else than reading /proc/net/netstat.
> 
> We experienced these problems on a PPC 2.4 xenomai-linux.
> 
> Any suggestions/ideas/explanations ?

This sounds like busybox is just triggering a kernel issue. Maybe we are
leaking some lock into application context. Are there any special
(RT-)drivers running? Does this already happen with only I-pipe applied
and enabled, but not Xenomai? Please try to describe your scenario
precisely (including .config) so that someone with a similar setup can
try to reproduce it.

Jan


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Re: [Xenomai-help] Xenomai and Busybox

[Philippe Gerum]

On Tue, 2007-06-19 at 08:23 +0200, Roderik_Wildenburg@domain.hid wrote:
> Does anyone use Busybox(www.busybox.net) on a xenomai-linux ?
> Or does anyone experience one of these problems with busybox on xenomai
> :
> - yes > /dev/null stalls system completely (yes is a little program
> returning 'y' continously; this does not happen using a normal bash
> shell)
> - "netstat -a" seems to delay realtime execution (periodic task produces
> overruns).

You mean the standard latency test?

>  I have no idea how this could happen, as I thought xenomai
> has highest priority and, as far as I have seen, netstat does not
> anything else than reading /proc/net/netstat.
> 
> We experienced these problems on a PPC 2.4 xenomai-linux.
> 

I-pipe 2.4.25/ppc 1.2-01? 
Which kind of board?
Which Xenomai version?

> Any suggestions/ideas/explanations ?
> 

Let's try a simple setup with your environment if it is not already the
case: Xenomai 2.3.1 stock + 2.4.25-ppc 1.2-01, standard latency test in
user-space. If you could also boot and run your current kernel on a
vanilla glibc-based ELDK setup (likely 3.1.1 with 2.4/ppc kernels), we
could check whether busybox raises new issues or not. The latest setup
works perfectly fine here on an Icecube for instance, "yes" and
"netstat" tests included.

> Many thanks in advance
> Roderik 
> 
> MAN Roland Druckmaschinen AG
> Vorsitzender des Aufsichtsrates: Hanno C. Fiedler
> Vorstand: Gerd Finkbeiner (Vorsitzender), Dr. Ingo Koch, Dr. Markus Rall, Paul Steidle    
> Sitz der Gesellschaft: Offenbach am Main, Registergericht: Amtsgericht Offenbach HRB-Nr. 42592    
> USt-Ident-Nr. DE 250200933
> 
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
-- 
Philippe.