Low perf with smp

[Mark Kirkwood]

Petri Helenius wrote:
> Mark Kirkwood wrote:
> 
>>
>> As I understand it, when you activate SMP a more accurate, but slower 
>> timecounter is chosen (typically 'i8254' instead of 'TSC' on intel HW).
> 
> 
> ACPI-fast should be the default with SMP. It's significantly faster than 
> i8254
> 

Yeah - if his Dell has ACPI enabled. However, ACPI-fast is still slower 
than say TSC.

Eric, do you want to show us the output of

$ sysctl kern.timecounter

with and without SMP?

Cheers

Mark