Event based scheduling and USB.

[Alexander Motin]

Takanori Watanabe wrote:
> In message <4CC732C7.50409 at FreeBSD.org>, Alexander Motin wrote:
>> Most likely you should be able to avoid interrupt sharing using some
>> additional HPET options, described at hpet(4).
> 
> Try to disable using shared IRQ with uhci, the IRQ used by HPET become cpu: 
> interrupt and certainly load average goes quite low, 

If you mean "cpuX:timer" - then probably you did something wrong and
system fallen back to LAPIC timer.

> but never transit to C3 state. Using legacy route, it works quite well.

C3 state is blocked when LAPIC timer used.

-- 
Alexander Motin