> So if the
> number of hpet channels is greater/equal to the number of possible
> CPUs it's perfectly fine and does not need IPI at all.
That is only a stop gap then. I don't see this being
generally true in the future. e.g. Intel announced SMT will be soon
back so even a standard dual core would exceed it with
current southbridges.
Also I'm not sure but I suspect non Intel HPETs have less than
three timers. Certainly they generally miss the 64bitness.
-Andi
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