G5 timebase_frequency
Michal Ostrowski
mostrows at watson.ibm.com
Sun Feb 8 09:40:38 EST 2004
I've noticed that timebase_frequency on a G5 appears to be defined by OF
to be 33.3333MHz. OTOH, the specs for the 970 claim that timebase has a
frequency of 1/8 that of the CPU clock rate. So, on a 2.0GHz processor
timebase would be 250MHz.
Which one of these, if any is correct?
My guess would be to say 250MHz, but my experiments show that a clock
based on timebase, assuming that rate, appears to be about 10% slow.
--
Michal Ostrowski <mostrows at watson.ibm.com>
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