On 08/12/2013 05:51 AM, GP Orcullo wrote:
>
>> * Can anyone else running a BeagleBone system try using the mini
>> GUI and enabling the backplot while a program is running?  I'd like
>> to know I'm not the only one seeing this issue.
>
> I have noticed this issue on RPi as well, the motors would slowdown
> or pause whenever the graphics load is too high. Axis is prone to
> this problem and is not easily reproduced. For mini, performing a
> refresh on a complex backplot or manipulating the zoom slider will
> trigger this problem.
>
> Note that I'm using the rtos-integration-preview3 version and there
> are no realtime errors whenever this happens.
>
> Cheers

... snip

I haven't followed this thread very closely, but ... am I missing 
something? I thought the whole idea behind a real-time system is to 
provide and reserve enough resources for the real-time tasks to complete 
them on-time. All other tasks get what's left over. This has been my 
experience in the past. When resources get sparse, the display gets 
jumpy, but motion is not affected. If motion does get affected, you 
don't have a real-time system. If motion gets affected and there are no 
real-time errors, that seems worse.

I mention this because, from my perspective, there seems to be a 
disconnect between the stated problem and the areas being looked at to 
find the problem. The problem may be with my perspective?


-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/

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