Andrew Lentvorski wrote:
> James G. Sack (jim) wrote:
>
> >After the system clock is initialized (eg, on boot), the hardware clock
> >has little to do with ongoing time operations.
>
> I don't believe that's true.
Trouble it, it is true.
> Using the kernel counters for timekeeping is pretty inaccurate (lots of
> interrupts can stall the kernel counters).
This is why they made NTP. And clockspeed.
> I believe that most things actually query the hardware clock when
> asked for time of day.
Nope. The hardware clock is just as bad.
-john
[EMAIL PROTECTED]:~]% man hwclock | grep -A1 -B4 DOS
The System Time is the time that matters. The Hardware Clock's basic
purpose in a Linux system is to keep time when Linux is not running.
You initialize the System Time to the time from the Hardware Clock
when Linux starts up, and then never use the Hardware Clock again.
Note that in DOS, for which ISA was designed, the Hardware Clock is
the only real time clock.
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