Re: Freeze due to performance_cx_lowest=LOW

on 16/06/2006 22:09 John Baldwin said the following:
> On Friday 16 June 2006 07:39, Andriy Gapon wrote:
>> Maybe I will say something too ignorant for this list, but is it
>> possible to drive hardclock with two interrupts (I haven't thought yet
>> how, though) and use RTC as the second interrupt source ?
>> I think that RTC/IRQ8 (usually) doesn't have problems associated with
>> 8254 timer/IRQ0 and can be used without mixed mode.
> 
> Well, you could use the RTC instead of the lapic timer on CPU 0 and then use 
> IPIs to forward clock interrupts to all the other CPUs just as we did before 
> we used the lapic timer.
> 

Well, I think MP systems are "meant" to use lapic timer; anyway, I do
not care much for them now :-) But I am exploring possibilities to avoid
using lapic timer (or to augment it) on UP systems. And, as you confirm,
RTC seems to be a good candidate for that.

-- 
Andriy Gapon