Shell bug(?)

[Gedare Bloom]

On Fri, Nov 1, 2019 at 10:52 AM Mathew Benson <mbenson at windhoverlabs.com>
wrote:

> So no matter what priority the shell task is initialized as, it preempts
> all other tasks?
>
> No.

With low priority (250) under the default scheduling (fixed priority
round-robin), the shell would only run when higher priority tasks are
blocked. This is typical, and the shell will be preempted when higher
priority tasks are made ready. The "TIME" state indicates your driver task
self-suspended on a timer, e.g., nanosleep or wake_after type call. It
should preempt the shell after the timeout. If it isn't then something is
going strangely.

As Joel hinted, if you're using POSIX threads, then 250 is higher priority
than 235.

Gedare


> On Fri, Nov 1, 2019 at 11:36 AM Joel Sherrill <joel at rtems.org> wrote:
>
>>
>>
>> On Fri, Nov 1, 2019, 11:24 AM Mathew Benson <mbenson at windhoverlabs.com>
>> wrote:
>>
>>> My shell task is set to priority 250.  I have another task that I've set
>>> to a priority of 235.  When I have the shell in the build, that priority
>>> 235 task appears to pend indefinitely with the shell reporting state =
>>> "TIME" and I don't know where it would be pending.  The task is accessing
>>> NOR drivers.  But just by running the shell command, releases that priority
>>> 235 task.  In fact, any command releases it.  Whether its a valid command
>>> or not.  But if I remove the shell from the build, everything is fine.  The
>>> task doesn't pend.  It executes as it should.  Did I miss something in the
>>> documentation regarding integration of the shell?  Is there something we
>>> are or are not supposed to do when the shell is integrated?
>>>
>>
>> I'm off today and this is from my phone.
>>
>> TIME should indicate that the task is sleeping. Assuming these are not
>> POSIX thread priority The priority 235 task has to be blocked or the shell
>> task won't run at all. So anytime your shell task runs, the others should
>> be blocked.
>>
>> --joel
>>
>>>
>>> --
>>> *Mathew Benson*
>>> CEO | Chief Engineer
>>> Windhover Labs, LLC
>>> 832-640-4018
>>>
>>>
>>> www.windhoverlabs.com
>>>
>>> _______________________________________________
>>> users mailing list
>>> users at rtems.org
>>> http://lists.rtems.org/mailman/listinfo/users
>>
>>
>
> --
> *Mathew Benson*
> CEO | Chief Engineer
> Windhover Labs, LLC
> 832-640-4018
>
>
> www.windhoverlabs.com
>
> _______________________________________________
> users mailing list
> users at rtems.org
> http://lists.rtems.org/mailman/listinfo/users
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