Hey Aubrey, Li, Aubrey wrote: > It's different from P-state, I think. P-state will not change when we > get P-state initial state > To get the current idle state, CPU must be in C0. So if it's in C1, the > obtaining changed it. > So I think we can just ignore the initial gap. It is not bigger than > 10ms. As for the default > and reasonable sampling period, it's less than 0.2%. > What do you think? ;-) The idle state could be obtained by reading a kstat on a given CPU...and that could be done without disturbing the CPU about which the kstat is being published. The gap is no bigger than 10ms on the clock CPU, but on other CPUs it could be much longer.
Thanks, -Eric
