Re: [hatari-devel] profiler cycles (was New WinUAE core issue with Bad Mood)

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 12/12/2014 10:22, Douglas Little a écrit :
> It is possible for an opcode to take 0 real cycles on 68030, depending
> on how it is being 'measured'.
>
> Most ops have a fixed execution time but they can overlap to a small
> degree with one another (a complete occlusion is rare) and with
> effective address calculation and memory writes.
>
> But if you're seeing 0-cycle opcodes in bulk it is much more likely to
> be a bug :)
>
> D

Hi

yes, I agree that with the head/tail cycles in 68020, some overlap can 
and will occur, but I doubt it's the case here, that's why I think it 
would be better the have the trace of one run through the reported piece 
of code than to have only the sum/average.

Nicolas