Eric Saxe wrote: > Mark Haywood wrote: > >> Li, Aubrey wrote: >> >>> I guess Eric means P-state and C-state. >>> If so, _PSD describes P-State Dependency and _CSD describes C-state >>> Dependency. >>> >>> >>> >> Ah. Sorry. I'm familiar with the _CSD (and of course the _PSD), but >> didn't recognize what Eric was referring to. So, I assume that means >> _PSD defines the CPUs that share frequency change and C-state dependency >> defines the CPUs that share a voltage change? >> I believe _PSD describes CPUs which share P-state changes (voltage/frequency) and _CSD describes CPUs which share C-state changes - presumbly changes to C-state lower (larger number) than C1 (halt) - nothing to do with voltage.
>> >> > Right, this is what I'm wondering as well (and I didn't know that _CSD > and _PSD described those two domains...is that really so?). > We can have the dispatcher consider thread placement across both levels > if that makes sense. >
