On Tue, Jun 17, 2003 at 11:21:13PM +0100, Russell King wrote:
> On Tue, Jun 17, 2003 at 11:11:46PM +0100, Riley Williams wrote:
> > On most architectures, the said timer runs at 1,193,181.818181818 Hz.
>
> Wow. That's more accurate than a highly expensive Caesium standard.
> And there's one inside most architectures? Wow, we're got a great
> deal there, haven't we? 8)
Well, it's unfortunately up to 400ppm off on most systems. Nevertheless
this is the 'official' frequency, actually it's a NTSC dotclock (14.3181818)
divided by 12.
> > > Please do not add CLOCK_TICK_RATE to the ia64 timex.h header file.
> >
> > It needs to be declared there. The only question is regarding the
> > value it is defined to, and it would have to be somebody with better
> > knowledge of the ia64 than me who decides that. All I can do is to
> > post a reasonable default until such decision is made.
>
> If this is the case, we have a dilema on ARM. CLOCK_TICK_RATE has
> been, and currently remains (at Georges distaste) a variable on
> some platforms. I shudder to think what this is doing to some of
> the maths in Georges new time keeping and timer code.
-- Vojtech Pavlik SuSE Labs, SuSE CR - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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