Re: RE: [Paparazzi-devel] LPC2148 performance

[Felix Ruess]

Hi,

I recently did this for Booz. If I did the calculations correctly I
had an average CPU load of around 50% and a max of just over 60% on
Booz.
For fixed wings this should be significantly lower.
You can check out what I did for Booz (in booz2_main.c) and define
CALC_CPU_LOAD in your airframe file.
Gautier was also thinking of doing a cpu load computation with a
module for fw and booz in the near future.

Cheers, Felix

On Wed, Dec 2, 2009 at 6:01 PM, Martin Mueller <address@hidden> wrote:
> Hi,
>
> some long time ago a measurement was done for the ATMEGA processor and showed 
> a maximum load of around 17% for that "old" 8bit 16MHz processor. Maybe that 
> stuff could help to implement a load monitor for the LPC.
>
> http://lists.gnu.org/archive/html/paparazzi-devel/2005-09/msg00001.html
>
> Martin
>
> ----- original Nachricht --------
>
> Betreff: RE: [Paparazzi-devel] LPC2148 performance
> Gesendet: Mi, 02. Dez 2009
> Von: Cédric Marzer<address@hidden>
>
>> Would it be possible to add an extra message that shows a percentage
>> telling
>> how much of the processing power one has left ? I think there is plenty of
>> processing power left for a normal flight but having some feedback would be
>> reassuring...
>>
>> Cédric
>>
>> -----Message d'origine-----
>> De : address@hidden
>> [mailto:address@hidden De la
>> part
>> de Steve Joyce
>> Envoyé : mardi, 1. décembre 2009 15:52
>> À : address@hidden
>> Objet : [Paparazzi-devel] LPC2148 performance
>>
>> Has anyone ever done any profiling on the airborne code to see how how many
>>
>> extra cycles are available in the various loops? I don't really have a good
>>
>> feeling for how much extra code you could sqeeze in there.  Are there tools
>>
>> available for that type of analysis?
>>
>> What would actually happen if you exceeded the available instructions
>> within
>>
>> a loop?
>>
>> /steve
>>
>>
>>
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>
> --- original Nachricht Ende ----
>
>
>
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