Update frequency of Time Base reg?

[Chris Friesen]

Arrigo Benedetti wrote:
> Dear all,
> 
> I'm looking for information about the update frequency of the Time Base 
> register
> for the latest dual G5 Powermac and Xserve models.
> By the way, what is the best way to find this kind of information?

33.3 MHz, I think.

The most portable way to find it is to calibrate it against gettimeofday().  For 
our product kernels, I've exported it via /proc.

Chris