Re: [hatari-devel] Re: Profiler - long history

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 18/05/2015 20:33, Eero Tamminen a écrit :

> Could you add that before next release, so that we don't regress?

yes, I will do it, should be quick.

> > but this would need to be improved anyway, because this code
> > only counted instruction cache misses, but not data cache misses.
>
> Yes, that data cache misses would be good to have also.
> This will require some changes both to Hatari and profiler
> data post-processing tools.
>
> Btw. I thought old WinUAE core supported only icache, and only
> the new one supports data cache?  If I remember correctly, Douglas
> had mentioned that the old icache misses weren't accurate, real
> machine cached few instructions more (or less) than what Hatari
> claimed.

It depends on the cpu. 68020 only has one cache for instructions. 68030 
and 68040 have 2 caches, one for instructions and one for data.

I don't know if new winuae version is more accurate regarding number of 
cache hits/misses (I guess it is), but maybe doug will be able to check 
again and tell if there's some differences with real HW.

Nicolas