Dana H. Myers wrote: > Where I can see T-states being useful is on systems where there's no > P-state support, or to create intermediate levels between P-states.
Interesting. :) Aubrey, Powertop doesn't currently report on T-state statistics, is that right? >> It's also my understanding that the performance impact of the >> T-states are fairly severe, which begs the question if we would ever >> want the CPU to enter them when not idle. When the CPU is idle, I >> would wonder how T-states would compare to what we get from entering >> the C1 state. Since T-states don't change the voltage, I would guess >> that C1 would actually buy more. Maybe Aubrey or someone else can >> correct me if I'm mistaken... > I don't believe it makes sense to compare T-states to C-states - I'd > compare T-states to > P-states. The performance impact of a T-state is comparable to that > of a P-state which > runs at the same effective clock rate, while the power savings of a > P-state is greater. That makes sense. Thanks, -Eric
