On Thu, Nov 08, 2001 at 11:30:52PM +0000, Alan Cox wrote:
> > Me thinks the real solution is the ACPI pm timer. 3 times the
> > resolution of the PIT and you can not stop it. The high-res-timers
> > patch will allow you to use this as the time keeper and just use the PIT
> > to generate interrupts.
>
> For awkward boxes you can use the PIT, for good boxes we can use rdtsc or
> eventually the ACPI timers when running with ACPI
The problem is that we use PIT even together with TSC because we need to
know how much time passed since last interrupt to be able to synchronize
the TSC with possibly delayed timer interrupts and TSC doesn't tell us
that ... but hopefully this can be done with some kind of PLL ...
-- Vojtech Pavlik SuSE Labs - 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/
This archive was generated by hypermail 2b29 : Thu Nov 15 2001 - 21:00:21 EST