Casper.Dik at Sun.COM wrote: >> Any plans in the pipeline to support the "older" AMD procs like Athlon 64 X2 >> 4850E? >> This feature does make a big difference in system power usage. When my >> system runs Solaris is cons > umes 90 watt, and when it runs an OS (windows or linux) which does support > this it consumes 68 watt > > Never. The powernow driver works for single CPU, single core. > Solaris uses the TSC for almost everything and "fixing" that and > making the wall clock sane is difficult.
Would there be a way to support single-socket dual core systems as a special case? I guess I'm not familar with whether a dual-core K8 chip changes frequency for all cores at the same time (the voltage certainly changes together). In which case, would a single socket dual-core case be easier to support as a specific (but common) special case, if the two cores change in lockstep? Easier, at least, than a multi-socket case where the different sockets will get out of sync. Or alternatively, would a DR-type solution work (drop all except one core when transitioning to low-speed idle modes; then use powernow in single-CPU mode)? On going back to full speed you'd re-enable the other core(s). Hugh. PS: Reply-To set to pm-discuss.