[ECOS] Performance measure on PowerPC

[ECOS] Performance measure on PowerPC

[Daniel.Lidsten]

Hi,

During the last week i have had a few performance problem with my MPC850.
Now that i understand that the real issue was that i had to many extern RAM
access then i have to do the best i can to avoid such during critical
sections. However, i need some performance measure function that is run
everytime the CPU is idle. My thought is that i create a low priority thread
together with the rest of all threads in my application. If i do so then i
will never get to the real idle_thread in eCos but always stay in the
application. 

Does anyone have a piece of code that by quite simple actions can measure
(and store?) the work load of a system? I have search through the archive
and found a "ping-pong" measurement method but i want some simpler...

Regards, Daniel

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Re: [ECOS] Performance measure on PowerPC

[Andrew Lunn]

> Does anyone have a piece of code that by quite simple actions can measure
> (and store?) the work load of a system? I have search through the archive
> and found a "ping-pong" measurement method but i want some simpler...

Are you referring to my code here? The calibration is a bit complex if
you are not so good at understanding threads etc, but the actual
measurement of load is very simple.

      Andrew 

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