Gavin Maltby <[EMAIL PROTECTED]> wrote:
> Hi
>
> On 08/25/05 17:19, Felix Schulte wrote:
>
> > What is the reason for having the cpuids 512 apart? Just bit mask
> > shifting?
>
> Well we already had single-core cpus for which the numbering
> scheme was established (depending on platform layout) and
> there was a need to keep the old cpuid namespace distinct
> from the additional part formed by adding multicore.
>
> So SB0 on a 6800 has "always" had cpuids 0,1,2,3.
> It nay have been nice to include the new sibling
> cores as 4,5,6,7 but those numbers were expected
> on SB1, by tradition. So, for these platforms
> (SF6800 family, SUNW,Sun-Fire) the 512 difference
> rule was established to jump over all possible
> exisiting cpuids.
What do you do when somebody make a machine that can hold
more than 512 CPU chips?
Jörg
--
EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin
[EMAIL PROTECTED] (uni)
[EMAIL PROTECTED] (work) Blog: http://schily.blogspot.com/
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