[ECOS] Performance problem mpc8xx

Christoph Csebits christoph.csebits@frequentis.com
Fri May 17 00:57:00 GMT 2002


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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