>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 c
ons
>> umes 90 watt, and when it runs an OS (windows or linux) which does support 
>> this it consumes 68 w
att
>> 
>> 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?

Same problem, I think.

If someone have me a old 2 CORE CPU then I could make it work,
ossibly.  But not in "production" but only for my powernow driver.

>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.

Possibly, but the wall clock won't be accurate (if you are)

>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).

Don't know.

Anyway, for Sun/Solaris, I don't think it is worth it.  But for
powernow "non-production" hack, I might get it to "workish"

Casper


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