RE: [discuss] Re: [LinuxBIOS] NUMA support for dual core Opteron - coreboot

14 Jul 2005


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On Thu, 2005-07-14 at 20:48 +0200, Andi Kleen wrote:
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AFIAK, for x86_64 kernel, it will try to read NUMA configuration 
from HW directory. We don't have to export any ACPI table.
It doesn't work for dual core or 8 sockets for some reason.
Since the
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SRAT code works fine and is in general more future proof we never 
tracked down why. Patches welcome.
Does each core has its own memory controller?
No.  Each processor has its own memory controller.  A processor
may have 1 or more cores.  (A processor is a physical package.
A core is a complete logic execution unit).  All cores in a processor
have equivalent access to the processor's memory controller.
-Mark Langsdorf
AMD, Inc.