[Xenomai-help] task switching logging

[Xenomai-help] task switching logging

[Johann Obermayr]

Hello,

we use follow function to report task switching.
     rt_task_add_hook(T_HOOK_SWITCH, (void(*)(void*))taskSwitchXenomai);
     sched_info_install_switch_hook(taskSwitchLinux);

we does not get a hook callback for switch from gatekeeper to primary 
domain.

we have a shadow task running in primary. on some function it switch 
back to secondary.
if we switch back the task with rt_task_set_mode(0,T_PRIMARY).
we only see the switching to gatekeeper and not the switch to primary ?

Any solution ?

Xenomai 2.5.6, linux kernel 2.6.32.15. gcc 4.3.3


   Jimmy

Re: [Xenomai-help] task switching logging

[Gilles Chanteperdrix]

Johann Obermayr wrote:
> Hello,
> 
> we use follow function to report task switching.
>      rt_task_add_hook(T_HOOK_SWITCH, (void(*)(void*))taskSwitchXenomai);
>      sched_info_install_switch_hook(taskSwitchLinux);
> 
> we does not get a hook callback for switch from gatekeeper to primary 
> domain.
> 
> we have a shadow task running in primary. on some function it switch 
> back to secondary.
> if we switch back the task with rt_task_set_mode(0,T_PRIMARY).
> we only see the switching to gatekeeper and not the switch to primary ?
> 
> Any solution ?
> 
> Xenomai 2.5.6, linux kernel 2.6.32.15. gcc 4.3.3

I am not sure I understand what you mean. Normally, with rt_task_hook,
the hook is called for all switches between Xenomai scheduler tasks.
So, when switching from secondary mode to primary mode, there should be
only one hook call: for the switch from "root thread", that is Linux, to
the real-time task itself. Are you sure this is not this call that you
are seeing?

-- 
					    Gilles.