| Re: [hatari-devel] relative perf between 030 / DSP / CPU? |
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- Subject: Re: [hatari-devel] relative perf between 030 / DSP / CPU?
- From: Andreas Grabher <andreas_g86@xxxxxxxxxx>
- Date: Thu, 26 Jun 2025 18:04:23 +0200
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> Am 26.06.2025 um 17:45 schrieb Eero Tamminen <oak@xxxxxxxxxxxxxx>:
>
> Hi,
>
>> On 26.6.2025 10.01, Nicolas Pomarède wrote:
>>> Le 25/06/2025 à 22:34, Eero Tamminen a écrit :
>>>> On 25.6.2025 10.56, Nicolas Pomarède wrote:
>> ...
>> address translation, page swap in case physical page is available or not. Also I think the read/write functions themselves are not the cycle accurate "plain 68030" version when MMU is used, because MMU is not cycle accurate at the time and using CE memory access functions would just slow down everything for no real accuracy gain
>
> Enabling MMU emulation on top of CE slows Hatari noticeably, that's why I though that it least _tries_ to be cycle-accurate...
>
>
> - Eero
On a real machine the MMU does not slow down the CPU. If software does not use it, it does nothing. If software uses it, then the MMU will help speeding up memory management.