> -----Original Message-----
> From: Lyle Coder [SMTP:x_coder@hotmail.com]
> Sent: Thursday, March 02, 2000 10:16 PM
> To: frank.butter@otto.de; linux-kernel@vger.rutgers.edu
> Subject: RE: 32-cpu box
>
> I dont think Linux can boot on more than 8 way system because it
programs
> the local APIC in the flat model which has support for only upto 8
local
> apics
this system is is able to build "partitions" of ressources
(processors, memory, I/O-channels).
using these you are able to boot multiple operating systems at the
same time with
dynamically ressource-management (during runtime, you can move a
processor
from one to another partition, if both the operating system support
the dynamic
ressource allocation). so even if you can support only 4 or 8
processors it's still
very usefull (imagine 4 LINUXes as a high availability solution in
one box,
beeing able to communicate via a shared memory area...)
what about multiple kernels? I think not long ago I read something
about this here...
on the other hand, they had to change something in Win2K, NetWare
and
UnixWare in order to run on this box - so it should be possible for
LINUX as well.
unfortunately the guys at UNISYS have a very close "strategic"
connection to M$ ;-(
what they do with this machine is what they call "cellular multi
processing".
every "cell" is running smp with up to four processors and they
connect them
via a "crossbar". there might be something necessary to adjust in
the OS...
interresting: in one cell the processors have to match, but in
different cells
there can be different types (e.g. IA32 / IA64, even unisys
proprietary "CMOS" processor).
frank
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