Li, Aubrey wrote: > Bill Holler wrote: > > >>>> You can probably take it from another CPU that's not in deep-c >>>> state (if there is one?) >>>> >>>> >>>> >>>> >>> Yes. Our initial thoughts are to sync up with a running CPU >>> via cross call. We need to run performance experiments with >>> different implementations to see what the costs are. >>> >>> >> Synching TSC/APIC with a running cpu is potentially much more >> accurate than using the HPET. However this will induce drift. >> >> > if all the cpus are in the deeper c-state,...? > An external source such as the HPET or platform pm timer needs to be used if all cpus are in deeper c-state. :-)
Bill
