Re: [Xenomai-help] Maximum number of realtime tasks

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

Frits de Klark wrote:
> Hello everyone,
> 
> I'm thinking about implementing a tcp/ip socket server where I assign 
> each incoming connection 2 realtime tasks; 1 one for transmitting data 
> and 1 for receiving data. I'm aware of the fact that the tasks will lose 
> their realtime capacities, but I want to do some tests nonetheless.
> I was wondering if there is a limit on the number of realtime tasks I 
> can allocate and run at the same time. Is there any?
> And may there be other problems to expect?
> 
> Thanks very much for your help,

Pay attention to the stack size of the user-space tasks: the default of
8 Megabytes will exhaust your RAM rapidly. So, you should either :
- set the default stack size with ulimit;
- or set the the stack size of the created threads, but in this case the
main thread will have an 8 Megabytes stack.

In order to set the stack size of a thread, use
pthread_attr_setstacksize if using the POSIX skin or the stksize 
parameter of rt_task_create if using the native skin.

-- 
                                                  Gilles Chanteperdrix