Hi, Follow up of my progress to this question:
I 'stepped inside' the important functions to make the observation that the flow of code is actually: ------------------------------------- _Scheduler_strong_APA_Node_initialize _Scheduler_Node_initialize _Thread_Initialize rtems_task_create _RTEMS_tasks_Initialize_user_task rtems_initialize_executive boot_card bsp_start_hook_0_done ------------------------------------- (So, the thread corresponding to the Init task gets created and assigned a scheduler node which is then initialized and the Init task is started by calling rtems_task_start on it) So, is it okay if I set the Affinity (defined here <https://github.com/richidubey/rtems/blob/03650c47c537c1acd584c5a9c3db588ab49634ef/cpukit/include/rtems/score/schedulerstrongapa.h#L75>) of a node to all processors when it gets initialized (here <https://github.com/richidubey/rtems/blob/03650c47c537c1acd584c5a9c3db588ab49634ef/cpukit/score/src/schedulerstrongapa.c#L739> ) because I remember Mr. Huber telling me earlier that by default a node/task/thread is allowed to execute on all the processors? On Fri, Aug 14, 2020 at 3:26 PM Richi Dubey <richidu...@gmail.com> wrote: > Hi, > > My code is failing because its logic assumed (code here > <https://github.com/richidubey/rtems/blob/03650c47c537c1acd584c5a9c3db588ab49634ef/cpukit/score/src/schedulerstrongapa.c#L315>) > that it would never get a node with an empty affinity (i.e. no affinity to > any processor or a 0 affinity). This assumption proved wrong as I can see > from the gdb and the current flow of code observed is: > > ------------------------------------------------ > _Scheduler_strong_APA_Get_lowest_scheduled > > _Scheduler_SMP_Enqueue > > _Scheduler_strong_APA_Enqueue > > _Scheduler_SMP_Unblock > > _Scheduler_strong_APA_Unblock > > _Scheduler_Unblock > > _Thread_Clear_state_locked > > _Thread_Start > > rtems_task_start > > _RTEMS_tasks_Initialize_user_task > > rtems_initialize_executive > > boot_card > > bsp_start_hook_0_done > ---------------------------------------------------- > > Why is this happening? The Affinity variable (defined here > <https://github.com/richidubey/rtems/blob/03650c47c537c1acd584c5a9c3db588ab49634ef/cpukit/include/rtems/score/schedulerstrongapa.h#L75>) > gets set whenever the Set affinity operation corresponding to Strong_APA > scheduler (defined here > <https://github.com/richidubey/rtems/blob/03650c47c537c1acd584c5a9c3db588ab49634ef/cpukit/score/src/schedulerstrongapa.c#L770>) > gets called. So, why wasn't this function called before this happened? Any > help would be appreciated. > > Thanks, > Richi. >
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