Timecounting issue

[Rui Paulo]

Rui Paulo wrote:
> Hi,
> I have a machine only knows to count time if I'm using TSC.
> 
> For example:
> # sysctl kern.timecounter.hardware=ACPI-fast && time sleep 1 && sysctl
> kern.timecounter.hardware=i8254 && time sleep 1 && sysctl
> kern.timecounter.hardware=HPET && time sleep 1 && sysctl
> kern.timecounter.hardware=TSC && time sleep 1
> 
> Gives:
> kern.timecounter.hardware: HPET -> ACPI-fast
> sleep 1  0.00s user 0.00s system 0% cpu 1.517 total
> kern.timecounter.hardware: ACPI-fast -> i8254
> sleep 1  0.00s user 0.00s system 0% cpu 1.516 total
> kern.timecounter.hardware: i8254 -> HPET
> sleep 1  0.00s user 0.00s system 0% cpu 1.516 total
> kern.timecounter.hardware: HPET -> TSC
> sleep 1  0.00s user 0.00s system 0% cpu 1.006 total
> 
> This happens if I enable SMP or not.
> 
> Any hint on how to debug this ?

I found the problem. My machine only works correctly with HZ=100.

-- 
Rui Paulo | PGP: F0E4 C7C7 1653 79B7 78DC  DD73 64FA B2C6 CF45 1F84