RE: [ECOS] Performance problem mpc8xx

[Daniel dot Andersson at combitechsystems dot com]

Hi again,

Is there any way in eCos to monitor what's happening in the CPU. For example
how much time we spend in my loop-function relative to the idle thread and
other processing like timer interrupt and so on.

Spontaniously - where do you think the problem lies? Is this a HW setup
problem or do we have a SW problem where we for example reacts on some
interrupt?

Regards, Daniel


>-----Original Message-----
>From: Christoph Csebits [mailto:christoph.csebits@frequentis.com]
>Sent: den 17 maj 2002 09:56
>To: Andersson Daniel
>Cc: ecos-discuss@sources.redhat.com
>Subject: Re: [ECOS] Performance problem mpc8xx
>
>
>Hi,
>
>On Fri, May 17, 2002 at 09:50:24AM +0200, 
>Daniel.Andersson@combitechsystems.com wrote:
>> I am having some performance problem on my MPC850 board. 
>When i setup a very
>> small main that only executes like 100 asm instruction then 
>it takes around
>> 6-7 times the teoretically time. My first thought was that 
>the caches wasnt
>> turned on but when i turned them off - before my short loop 
>- as a test,
>> then i got a further decrease of performance (3.5 times).
>> 
>> Does anybody have any ideas of what maight be wrong here?
>
>If you are you executing out of RAM, maybe your RAM isnt
>initialized at its optimum. (shot in the blue)
>
>good luck, christoph
>
>-- 
>

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