Re: [Xenomai] posix skin pthread_create issue

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On 09/12/2012 10:19 AM, Pierre.QUELIN@solystic.com wrote:
> 
> Dear all,
> 
> I have an application that is working fine with the standard Linux
> kernel API and don't works if I build it with Xenomai API.

What version of Xenomai? What I-pipe patch? What platform?

> 
> I have a strange issue. At the begining, the application creates 28
> threads and all the 33 next returns an error. pthread_create()
> returns 12 (ENOMEM).
> 
> I'm not sure to understand which memory is missing.
> 
> To solve this I have try :
> 
> 1) to fix the pthread stack size at PTHREAD_STACK_MIN. =>without
> effect

For the stack size issue, see:
http://www.xenomai.org/documentation/xenomai-2.6/html/TROUBLESHOOTING/#_my_application_reserves_a_lot_of_memory

But that is probably not your issue.

> 2) to change the RealTime sub-system options I increase the number of
> registry slots from 512 to 1024 I increase the size of the system
> heap from 256 to 1024 I increase the size of the private stack pool
> from 128 to 512 =>without effect
> 
> Could you please help me.

ENOMEM seems to be returned in case the stack pool is not large enough.
Maybe 512 is not enough? If using Xenomai 2.6.0 with gcc 4.7, you should
add '-fno-omit-frame-pointer' to the CFLAGS. This issue is fixed in
Xenomai 2.6.1.

> 
> Best regards
> 
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-- 
					    Gilles.