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

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
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---

• References:
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: George Anzinger <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Vojtech Pavlik <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Bill Davidsen <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: David Lang <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Vojtech Pavlik <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Linus Torvalds <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Lee Revell <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Dmitry Torokhov <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Lee Revell <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Andrew Morton <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Chris Wedgwood <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: dean gaudet <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Petr Vandrovec <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Jan Engelhardt <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Lee Revell <[email protected]>
  • Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    • From: Jan Engelhardt <[email protected]>

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