Re: [Xen-devel] [PATCH 0/2] Improve hpet accuracy

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 13/6/08 05:47, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> I wondered what was different between apic=1 vs 0. Using:
> 
> # cat /proc/interrupts | grep 'LOC|timer'; sleep 10; \
>      cat /proc/interrupts | grep 'LOC|timer'
> 
> you can see that there are always 1000 LOC/sec.  But
> with apic=1 there are also about 350 IO-APIC-edge-timer/sec
> and with apic=0 there are 1000 XT-PIC-timer/sec.
> 
> I suspect that the latter of these (XT-PIC-timer) is
> messing up your policy and the former (edge-timer) is not.

I think apic=0 is not a particularly useful configuration though, right?

 -- Keir



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