On 01-May-2002 Jonathan Mini wrote:
> Andrew Gallatin [gallatin@cs.duke.edu] wrote :
>> > No, the interrupts seem to be round-robin, but each clock intr is only
>> > sent to one CPU unlike on alpha where they are broadcast.
>>
>> So each CPU gets (1/num_cpu) * hz clock interrupts/sec?
>
> Yes, but because the timer is set to num_cpu*hz, each CPU ends up getting
> the normal hz interrupts. That's why it runs round-robin but looks like a
> broadcast.
Eh, are you talking about the Alpha? On x86 we don't do this and have to use
IPI's to simulate a broadcast-type deal.
--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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