[coreboot] Why does the Opteron 6328/6220 have two NUMA nodes?

[Robert Reeves]

Socket C32 uses a single die per package, G34 is always a dual die MCM, even if it's merely one of the 4 or 8 core SKUs. This is because it needs the dual channel memory controllers from two bulldozer dies in order to support the quad channel memory of G34 platforms.On Feb 2, 2018 8:35 PM, Taiidan at gmx.com wrote:
>
> I was under the assumption that they are a single CPU package like their 
> desktop FX-8100/8300 counterparts, however under linux the 6328 is 
> reported as two NUMA nodes (CPU 0-3 and 4-7) like the dual CPU 6386 
> package is. 
>
> This presents a serious performance issue. 
>
> I am not sure what is reported under the stock BIOS as I am unable to 
> reflash right now, does anyone know if this is a bug? 
>
>
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