Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt

Linus Torvalds
2005-07-14T18:22:03Z

On Thu, 14 Jul 2005, Jan Engelhardt wrote:
>
> >> >>> What does Windows do here?
> >> >> windows xp base rate is 100Hz... but multimedia apps can ask for almost
> >> > 83Hz
> >> Well, Windoes 98 (vmmon) shows very different ones:
> >Wow. Windows has been doing this since *98*?
>
> ...since Windows does multitask scheduling I suppose, which is since 95 or
> NT I suppose.

I wouldn't be surprised if windows did it from day 1.

Windows started out as a program loader and a somewhat graphical shell. I
think people forget the early trials, ie before Win-3.0, which ended up
mostly running DOS programs. With a timer frequency of 18.2Hz or something
like that.

So I wouldn't be surprised if Win-1.0 used to switch between different
frequencies..

Linus