Re: Interrupt frequency

[jdebert <jdebert@xxxxxxxxxx>]

jdebert wrote:
> Sahan Sanjeewa wrote:
>
> > Hi,
> >
> > Can somebody tell me the usage (or the meaning) of the constant HZ in
> > /usr/src/linux-2.4/include/asm/param.h. Does it relate to the interrupt
> > frequency ?
>
> The HZ constant started out as a locale-dependent variable, and could be 
> either 50 or 60. The purpose and history of this is in a kernel howto 
> somewhere. Perhaps in the kernel-developer's howto.
>
> It does relate to some critical timing, if I recall correctly.
>
> It's been a long time since I read the kernel how-to's (since 0.99?) and 
> they could explain much better than I ever could.

I recall also that HZ affects counters that will change how the system 
operates and keeps system time. That seems fairly critical in itself.

=-=


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