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

[Douglas Little <doug694@xxxxxxxxxxxxxx>]

Ok thanks for explaining. Sounds sensible.

D.

On 18 May 2015 at 10:58, Nicolas Pomarède <npomarede@xxxxxxxxxxxx> wrote:

Le 18/05/2015 11:43, Douglas Little a écrit :

Hi,

    ...

    I could add something similar, but this would need to be improved
    anyway, because this code only counted instruction cache misses, but
    not data cache misses.


One thing I meant to ask about the new core - does it assume CPU cache
burst modes are available? Or have those been locked off for Falcon?
(since the signals are not implemented on the real machine). This could
upset timings in some interesting ways...

Hi

from what I see in cache for 68030, burst read will fetch 3 additional longs when the accessed memory is of type CE_MEMBANK_FAST32.

For now, memory type is not used in Hatari, and anyway the falcon doesn't have the equivalent of fast 32 bit ram IIRC, so I would say that there's no burst mode in Falcon mode with 68030 in Hatari (but there could be one later for TT mode with extra TT RAM (not implemented yet))

Nicolas