Re: Calculating processor usage (M68K)

[EMAIL PROTECTED] (42Bastian Schick) wrote in message news:<[EMAIL PROTECTED]>...
> On 25 Nov 2003 01:34:23 -0800, [EMAIL PROTECTED] (test) wrote:
> 
> >Could someone tell me know how to calculate MIPS being used by an
> >existing application, on an existing processor?
> >
> >I'm not looking for raw processor power available (so benchmark pgms
> >won't do). We have an application (real-time, infinte loop) running on
> >the processor, and want to know how busy the processor is on an
> >average. It would suffice even if we could only determine the
> >worst-case utilization. The application runs on pSOS on M68K.
> 
> 
> You may write a timer interrupt (period depends on how accurated your
> figures must be) and check which is the return address i.e. the
> interrupted function.
> Then count numbers of interrupts and number of times where you did
> interrupt the idle loop (or a self written low-prio task).
> 
This works well if you have a spare timer that can be programmed to
issue a non-maskable (level 7 on 68k) interrupt. You can use a buffer
to capture the value of  the program counter and use the data to
analyse the systems steady-state behaviour (if it has one!).

I have also used the abort button for this purpose but it made my
finger
tired. 
> ---
> 42Bastian
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