[Xenomai-help] Xenomai PPC -> Disable FP : Bingo !

[smannori]

Hi:

---
Gilles Chanteperdrix <[EMAIL PROTECTED]>
Data:   Fri, Altro: 14, 2005 11:01 pm
A:  <[EMAIL PROTECTED]>
Cc: 
Priority:   Normal

[EMAIL PROTECTED] wrote:
 > Hi:
 >
 > thanks for the help. This is a short report of that happen.
 > (...)
 >
 > Konsole application is crashed with signal 11 SIGSEV
 > (...)

Ok, if you can, could you try to compile xenomai without FPU support ?
---


Yes Sir. And now works without glitch both in text and graphics.
Very good suggestion :) Sir.

I smell FPU/Altivec problems...May be Adeos is not fully G4 compliant for
the FP section ? Ok Real man don't need FP (see Linux/Linus in the kernel).
... but sometime a couple of FP ops could be very useful :)

Thanks again for the help: now the system go.

I'm looking forward for latest kernel support, Comedi, ecc..

Good Nigth :)

 Simone

Re: [Xenomai-help] Xenomai PPC -> Disable FP : Bingo !

[Gilles Chanteperdrix]

[EMAIL PROTECTED] wrote:
 > I smell FPU/Altivec problems...May be Adeos is not fully G4 compliant for
 > the FP section ? Ok Real man don't need FP (see Linux/Linus in the kernel).
 > ... but sometime a couple of FP ops could be very useful :)

This is probably a Xenomai bug. Adeos has not much to do about FPU,
except insuring that a domain may not preempt another while it is
switching its FPU context.

If you suspect the problem comes from Altivec (which is highly probable,
if not almost certain, since ppc FPU switching code does not seem to
switch Altivec contexts, actually), you may try choosing a processor
without altivec support in kernel configuration menu, re-compile kernel
and re-enable Xenomai FPU support.

-- 


Gilles Chanteperdrix.